JP6709673B2 - Gas cooker - Google Patents
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- JP6709673B2 JP6709673B2 JP2016087693A JP2016087693A JP6709673B2 JP 6709673 B2 JP6709673 B2 JP 6709673B2 JP 2016087693 A JP2016087693 A JP 2016087693A JP 2016087693 A JP2016087693 A JP 2016087693A JP 6709673 B2 JP6709673 B2 JP 6709673B2
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- 241000209094 Oryza Species 0.000 claims description 95
- 235000007164 Oryza sativa Nutrition 0.000 claims description 95
- 235000009566 rice Nutrition 0.000 claims description 95
- 230000002093 peripheral effect Effects 0.000 description 15
- 238000010411 cooking Methods 0.000 description 12
- 239000002244 precipitate Substances 0.000 description 9
- 238000009835 boiling Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 239000013049 sediment Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000002028 premature Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940100486 rice starch Drugs 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000013555 soy sauce Nutrition 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Description
本発明は、ガス炊飯器、特に、炊飯釜の釜底下面に接触して釜底の温度を検出する感熱部材を備えたガス炊飯器に関する。 TECHNICAL FIELD The present invention relates to a gas rice cooker, and more particularly to a gas rice cooker including a heat-sensitive member that comes into contact with a bottom surface of a bottom of a rice cooker to detect a temperature of the bottom.
図６に示すように、炊飯釜(4)の下方に感熱部材(3)が設けられているガス炊飯器では、感熱部材(3)による検知温度が設定温度に達すると、ガスバーナ(5)の燃焼が自動停止して消火される構造となっている。この種の感熱部材(3)は、炊飯釜(4)の釜底下面中央部(41)に接触してその部分の温度のみを検知するもので、検知された温度が前記設定温度を超えた時点で、炊飯釜(4)内の米飯は炊き上がったと判断されて、炊飯加熱が停止される。 As shown in FIG. 6, in the gas rice cooker in which the heat sensitive member (3) is provided below the rice cooker (4), when the temperature detected by the heat sensitive member (3) reaches the set temperature, the gas burner (5) Combustion is automatically stopped and extinguished. This type of heat-sensitive member (3) contacts the central bottom surface (41) of the bottom of the rice cooker (4) and detects only the temperature of that portion, and the detected temperature exceeds the set temperature. At this point, it is determined that the cooked rice in the rice cooker (4) has been cooked, and the heating of the cooked rice is stopped.
一回の炊飯量が多い場合、炊飯釜(4)内にて全体的に熱が均一に対流しにくい状態となるから、炊飯の進行に伴なって、炊飯中に、米の澱粉質が凝固しておねばと称される粘度の高い澱粉糊が多量に生じたり、洗米不足の米や無洗米に糠が付着していたり、さらには、割れ米が混ざっていたりした場合、これらが沈殿物(44)として、炊飯釜(4)の釜底中央部に滞留することがある。
炊飯釜(4)の釜底下面はガスバーナ(5)によって熱せられるが、炊飯中に、上記したような沈殿物(44)が、釜底、特に、釜底上面中央部に沈殿し堆積すると、炊飯釜(4)内の釜底中央部における熱の対流が悪くなると共に、沈殿物(44)が断熱層として機能することから、釜底下面中央部(41)が局部的に昇温する。このような場合、釜底下面中央部(41)の温度を検知する感熱部材(3)の検知温度が急上昇して設定温度に達すると、米飯が炊き上がっていないにも関わらず、ガスバーナ(5)が早切れしてしまうことがある。このようなガスバーナ(5)の早切れにより、米飯に炊き上がりむらや炊き上がり不良が生じさせてしまうと、米飯の品質を低下させる問題がある。
If the amount of rice cooked at one time is large, it will be difficult for the heat to uniformly convection in the rice cooker (4), so the rice starch will coagulate during the rice cooking as the rice cooks. If a large amount of high-viscosity starch paste called soy sauce is produced, or if bran is adhered to rice that has not been washed enough or that has not been washed, and if cracked rice is mixed, these precipitates. As (44), the rice cooker may stay in the center of the bottom of the cooker (4).
The lower surface of the bottom of the rice cooker (4) is heated by the gas burner (5), but during rice cooking, if the above-mentioned precipitate (44) settles and accumulates on the bottom of the rice cooker, especially at the center of the upper surface of the cooker bottom, The convection of heat in the central portion of the bottom of the rice cooker (4) becomes worse, and the precipitate (44) functions as a heat insulating layer, so that the central portion (41) of the lower surface of the bottom of the rice cooker locally heats up. In such a case, when the temperature detected by the heat-sensitive member (3) that detects the temperature of the central portion (41) of the bottom of the pot bottom suddenly rises to the set temperature, the gas burner (5 ) May end prematurely. If the gas burner (5) is cut off prematurely to cause uneven cooking or defective cooking, the quality of the cooked rice may be deteriorated.
そこで、本出願人は、同図に示すように、炊飯釜(4)の底部と僅かな隙間(S)を介して、均熱板(40)を設置する構成のものを先に提案した。このものでは、均熱板(40)を、炊飯釜(4)の釜底下面に対して非接触状態に配設させることにより、炊飯釜(4)の釜底下面は、ガスバーナ(5)の炎孔(50)からの火炎によって直接加熱させられず、均熱板(40)からの輻射熱によって熱せられる上に、隙間(S)に生じる空気流によって、炊飯釜(4)の釜底下面中央部(41)は冷却される（特許文献２参照）。
これにより、炊飯釜(4)の釜底上面中央部に、おねばや糠や割れ米等からなる沈殿物(44)が堆積して熱の対流が悪くなっても、釜底下面中央部(41)における急激な温度上昇するのを緩和させることができ、感熱部材(3)の検知温度が急上昇することを抑制して、ガスバーナ(5)の早切れを防止している。
Therefore, the present applicant previously proposed a structure in which the heat equalizing plate (40) is installed through a slight gap (S) from the bottom of the rice cooker (4) as shown in the figure. In this case, by disposing the soaking plate (40) in a non-contact state with the bottom surface of the bottom of the rice cooker (4), the bottom surface of the bottom of the rice cooker (4) can be connected to the gas burner (5). It is not directly heated by the flame from the flame hole (50) but is heated by the radiant heat from the heat equalizing plate (40), and due to the air flow generated in the gap (S), the bottom center of the bottom of the rice cooker (4) The part (41) is cooled (see Patent Document 2).
As a result, even if the convection of heat deteriorates due to the sediment (44) consisting of the oneba, bran, broken rice, etc. accumulated in the central portion of the upper surface of the bottom of the rice cooker (4), the central portion of the lower surface of the bottom ( It is possible to mitigate a rapid temperature rise in 41), suppress a sharp rise in the temperature detected by the heat-sensitive member (3), and prevent premature disconnection of the gas burner (5).
しかしながら、同図の矢印に示すように、炊飯釜(4)の下方から送られてくるフレッシュエアーの殆どは、ガスバーナ(5)のバーナヘッド(51)の中央孔を通過した後、その上方開放端から炎孔(50)へ二次空気として送られてしまうため、前記した隙間(S)へ流れる空気はごく少量となる。その結果、釜底下面中央部(41)を含む釜底下面をフレッシュエアーで効果的に空冷することは期待できず、釜底下面の温度上昇を積極的に抑制することは困難であった。 However, as shown by the arrow in the figure, most of the fresh air sent from below the rice cooker (4) passes through the central hole of the burner head (51) of the gas burner (5) and then opens upward. Since the air is sent from the end to the flame hole (50) as secondary air, the amount of air flowing into the gap (S) is extremely small. As a result, it cannot be expected that the bottom surface of the bottom of the furnace, including the central portion (41) of the bottom surface of the bottom, is effectively air-cooled with fresh air, and it is difficult to positively suppress the temperature rise of the bottom surface of the bottom.
本発明は、上記問題点に鑑みてなされたものであり、炊飯時にて、炊飯釜の釜底下面に接触させた感熱部材が設定温度を検知したとき、ガスバーナが自動消火するガス炊飯器において、炊飯釜の釜底下面の温度が局部的に急上昇することにより、ガスバーナが早切れする不都合を防止するとともに、炊飯釜の釜底下面全体を均一に加熱して、良質な炊き上がりの米飯を提供することをその課題とする。 The present invention has been made in view of the above problems, when cooking rice, when the heat-sensitive member in contact with the bottom surface of the bottom of the rice cooker detects the set temperature, the gas burner in which the gas burner automatically extinguishes fire, The temperature of the bottom of the bottom of the rice cooker suddenly rises locally to prevent the gas burner from prematurely cutting off, and to uniformly heat the entire bottom of the bottom of the rice cooker to provide high quality cooked rice. The task is to do.
上記目的を達成するために講じた本発明に係るガス炊飯器は、炊飯釜と、前記炊飯釜の下方に設置され且つ中央孔が開設された環状のバーナヘッドを有するガスバーナと、前記中央孔内に位置し且つ前記炊飯釜の釜底下面に接触して釜底下面の温度を検知する感熱部材とを具備するガス炊飯器において、
前記炊飯釜の釜底下面中央部に、前記感熱部材が接触する被感熱部が下方に突設されており、
前記中央孔の周縁又はその近傍から、前記感熱部材を囲むように遮熱体が上方に向かって延設され、
前記遮熱体は、前記感熱部材と前記被感熱部との接触部を包囲するように設けられており、
前記感熱部材の上端に設けられる感熱素子は、前記遮熱体に包囲される高さに位置し、
前記遮熱体の上端は前記炊飯釜の釜底下面よりも下方に位置するように設定されていると共に、前記中央孔の開放端近傍に対応する前記遮熱体の所定位置には空気通過部が設けられている。
A gas rice cooker according to the present invention, which has been devised to achieve the above object, includes a rice cooker, a gas burner having an annular burner head installed below the rice cooker and having a central hole, and the inside of the central hole. A gas rice cooker which is located at and which is in contact with the bottom surface of the bottom of the rice cooker and detects the temperature of the bottom surface of the bottom of the rice cooker,
In the central portion of the bottom surface of the bottom of the rice cooker, a heat-sensitive part with which the heat-sensitive member comes into contact is projected downward.
From the periphery of the central hole or in the vicinity thereof, a heat shield is extended upward so as to surround the heat sensitive member,
The heat shield is provided so as to surround the contact portion between the heat sensitive member and the heat sensitive portion,
The heat sensitive element provided at the upper end of the heat sensitive member is located at a height surrounded by the heat shield,
The upper end of the heat shield is set to be located below the bottom surface of the bottom of the rice cooker, and an air passage portion is provided at a predetermined position of the heat shield near the open end of the central hole. Is provided.
上記技術的手段は次のように作用する。
炊飯時には、環状のバーナヘッドの上面に形成されている炎孔からの火炎によって炊飯釜の釜底下面が加熱されると共に、バーナヘッドの中央孔内に位置させた感熱部材によって釜底下面の温度が検知される。
前記バーナヘッドの中央孔は、前記炎孔に二次空気として送られるフレッシュエアーの通過口となるが、中央孔の周縁又はその近傍には、感熱部材を囲むように遮熱体が上方に延設されているから、下方から中央孔内へ送られて来るフレッシュエアーは、中央部の開放端から直ちにバーナヘッドの上面側へ拡散されることなく、遮熱体の上方へ流れていき、炊飯釜の釜底下面にぶつかった後、釜底下面に沿って周囲へ拡散される。これにより、感熱部材の周囲及び感熱部材が接触する釜底下面はフレッシュエアーで冷却される。なお、フレッシュエアーは釜底下面を冷却した後、前記炎孔へ送られる。
また、前記遮熱体のうち、前記中央孔の開放端近傍に対応する所定位置には、空気通過部が形成されているから、前記フレッシュエアーの一部は、前記中央孔の開放端から、この空気通過部を通って、バーナヘッドの上面へ流れて行く。これにより、バーナヘッドの上面の炎孔にフレッシュエアーを二次空気として送ることができる。
また、遮熱体を、感熱部材の上端に設けられている感熱素子が接触する被感熱部を覆うように設ければ、遮熱体内を流れるフレッシュエアーによって、被感熱部を含む炊飯釜の釜底下面及び感熱部材の周囲を全域的に冷却できる。
また、遮熱体で感熱部材の感熱素子及び感熱素子が接触する被感熱部を覆うことにより、外風によって火炎が動いた場合でも、感熱素子及び感熱素子が接触する被感熱部に火炎が流れるのを防止できる。
The above technical means act as follows.
During rice cooking, the lower surface of the bottom of the rice cooker is heated by the flame from the flame hole formed on the upper surface of the annular burner head, and the temperature of the lower surface of the bottom of the cooker is adjusted by the heat-sensitive member located in the central hole of the burner head. Is detected.
The central hole of the burner head serves as a passage for fresh air sent as secondary air to the flame hole, and a heat shield extends upward to surround the heat sensitive member at or near the periphery of the central hole. Since it is installed, the fresh air sent into the central hole from below does not immediately spread from the open end of the central part to the upper surface side of the burner head, but flows over the heat shield to cook rice. After hitting the bottom of the pot bottom of the pot, it is diffused to the surroundings along the bottom of the pot bottom. As a result, the periphery of the heat-sensitive member and the bottom surface of the bottom of the kettle with which the heat-sensitive member contacts are cooled with fresh air. The fresh air is sent to the flame holes after cooling the bottom surface of the pot bottom.
Further, in the heat shield, at a predetermined position corresponding to the vicinity of the open end of the central hole, since an air passage portion is formed, part of the fresh air, from the open end of the central hole, Through this air passage, it flows to the upper surface of the burner head. As a result, fresh air can be sent to the flame holes on the upper surface of the burner head as secondary air.
Further, if the heat shield is provided so as to cover the heat-sensitive part that is in contact with the heat-sensitive element provided at the upper end of the heat-sensitive member, the fresh air flowing through the heat-shield will cause fresh air to flow through the heat-shielding part. The bottom bottom surface and the periphery of the heat-sensitive member can be cooled entirely.
Further, by covering the heat-sensitive element of the heat-sensitive member and the heat-sensitive part with which the heat-sensitive element is in contact with the heat shield, the flame flows to the heat-sensitive element and the heat-sensitive part with which the heat-sensitive element is in contact even when the flame moves due to outside wind. Can be prevented.
上記ガス炊飯器において、好ましくは、前記遮熱体は、前記感熱部材よりも大径で且つ上下に開放する筒体と、前記筒体の下端縁から下方へ延設された複数の係止片とを有し、
前記係止片は前記中央孔の周縁又はその近傍に係止されると共に、隣接する前記係止片間に前記空気通過部が形成されるものとする。
遮熱体は、ガスバーナと別体で設けられており、炊飯釜を設置する前のガスバーナのバーナヘッドの中央孔に上方から嵌め込み、中央孔の周縁又はその近傍に複数の係止片を係止させることにより装着される。筒体の下端と中央孔との間に隙間を有する装着態様とすることにより、筒体の下方で且つ複数の係止片間に設けられる隙間を前記空気通過部として機能させることができる。
In the gas rice cooker, preferably, the heat shield is a tubular body having a diameter larger than that of the heat-sensitive member and opened up and down, and a plurality of locking pieces extending downward from a lower end edge of the tubular body. Has and
The locking piece is locked to the periphery of the central hole or its vicinity, and the air passage portion is formed between the adjacent locking pieces.
The heat shield is provided separately from the gas burner, and is fitted from above into the central hole of the burner head of the gas burner before installing the rice cooker, and multiple locking pieces are locked at the periphery of the central hole or in the vicinity thereof. It is installed by making it. By adopting a mounting mode in which there is a gap between the lower end of the cylinder and the central hole, the gap provided below the cylinder and between the plurality of locking pieces can function as the air passage portion.
本発明は上記構成により、感熱部材及び感熱部材が接触している炊飯釜の釜底下面をフレッシュエアーで積極的に冷却することができるから、炊飯中に、炊飯釜の釜底上面中央部に、おねばや糠や割れ米等からなる沈殿物が堆積して熱の対流が悪くなっても、釜底下面の局部的な温度の急上昇を緩和させることができる。これにより、炊飯が完了する前に、感熱部材で検知される温度が設定温度を超えてしまい、ガスバーナが自動消火により早切れするといった不都合を防止することができる。
また、前記遮熱体のうち前記中央孔の開放端近傍の所定位置には、バーナヘッドの上面に向かってフレッシュエアーを流すための空気通過部が形成されているから、燃焼不良を生じさせることなく、炊飯釜下面全体を均一に加熱できる。このように、ガスバーナの早切れを防止するとともに、炊飯釜下面全体を均一に加熱することにより、一回の炊飯量が多くても、良質な炊き上がり状態の米飯を提供することができる。
With the above-described configuration, the heat-sensitive member and the bottom surface of the bottom of the rice cooker in contact with the heat-sensitive member can be positively cooled by fresh air. Even if a sediment such as a bed of rice bran, rice bran, or broken rice accumulates and heat convection deteriorates, it is possible to mitigate the local temperature sharp rise at the bottom of the pot bottom. Accordingly, it is possible to prevent the inconvenience that the temperature detected by the heat-sensitive member exceeds the set temperature before the rice cooking is completed and the gas burner is prematurely cut off due to automatic fire extinguishing.
In addition, an air passage portion for flowing fresh air toward the upper surface of the burner head is formed at a predetermined position near the open end of the central hole in the heat shield, which may cause combustion failure. Without, the entire bottom surface of the rice cooker can be heated uniformly. As described above, by preventing the gas burner from prematurely cutting and uniformly heating the entire bottom surface of the rice cooker, it is possible to provide cooked rice of good quality even if the amount of rice cooked at one time is large.
以下、本発明を実施するための形態について添付図面を参照しながら説明する。
本発明の実施の形態に係るガス炊飯器は、図１に示すように、本体ケース(31)内に炊飯釜(32)とガスバーナ(2)が収容されてあり、炊飯釜(32)の釜底下面(32a)の中央部から円柱状の被感熱部(33)が下方に突設されたものを採用する。この被感熱部(33)の突出端面(33a)に、感熱素子(30)が接触する態様で、炊飯釜(32)の下方に感熱部材(3)が設けられている。
Embodiments for carrying out the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the gas rice cooker according to the embodiment of the present invention has a rice cooker (32) and a gas burner (2) housed in a main body case (31), and the cooker of the rice cooker (32) is A columnar heat-sensitive portion (33) is projected downward from the center of the bottom surface (32a). A heat-sensitive member (3) is provided below the rice cooker (32) in such a manner that the heat-sensitive element (30) contacts the protruding end surface (33a) of the heat-sensitive portion (33).
ガスバーナ(2)は、環状のバーナヘッド(21)を備えており、炊飯釜(32)の下面の下方に位置している。また、バーナヘッド(21)の中央部には二次空気通過口となる中央孔(20)が形成されており、中央孔(20)を囲むように、バーナヘッド(21)には、内向き炎孔(22)と外向き炎孔(23)が形成されている。これら内向き炎孔(22)と外向き炎孔(23)の各々から、火炎(F)が内向きに又は外向きに噴出するように設定する。 The gas burner (2) includes an annular burner head (21) and is located below the lower surface of the rice cooker (32). Further, a central hole (20) serving as a secondary air passage opening is formed in the center of the burner head (21), and the burner head (21) faces inward so as to surround the central hole (20). A flame hole (22) and an outward flame hole (23) are formed. The flame (F) is set to be ejected inward or outward from each of the inward flame hole (22) and the outward flame hole (23).
感熱部材(3)は、バーナヘッド(21)の中央孔(20)内に位置するように設置されてあり、上述したように、その上面の感熱素子(30)が、炊飯釜(32)の釜底下面(32a)の中央部から下方に突出している被感熱部(33)の突出端面(33a)に接触して、被感熱部(33)の温度を検知する。 The heat-sensitive member (3) is installed so as to be located in the central hole (20) of the burner head (21), and as described above, the heat-sensitive element (30) on the upper surface of the heat-sensitive member (3) of the rice cooker (32). The temperature of the heat-sensitive portion (33) is detected by contacting the protruding end surface (33a) of the heat-sensitive portion (33) protruding downward from the central portion of the bottom surface (32a) of the pot bottom.
バーナヘッド(21)の中央孔(20)の開放端の周縁には、遮熱体(1)が、上方へ突出するように装着されている。
遮熱体(1)は、図２に示すように、感熱部材(3)の感熱素子(30)と、被感熱部(33)の突出端面(33a)との接触部を周方向に全域にわたって包囲する筒体(10)と、筒体(10)の下端から周方向に９０度間隔で下方に突出させている４つの係止片(11)とから構成されている。
係止片(11)は、筒体(10)の下端から筒体(10)の外周面よりも外方へ突出するように折り曲げられて、係止片(11)の最大突出部(11a)で、中央孔(20)の上端領域の内周縁を押圧する態様で中央孔(20)内に嵌め込まれ、最大突出部(11a)の下方に設けた段部(11b)で、バーナヘッド(21)の中央孔(20)内にて内方へ張り出している張り出し片部(24)に係止させている。
このように、遮熱体(1)は、バーナヘッド(21)の上方から着脱自在にセットされる。
A heat shield (1) is attached to the peripheral edge of the open end of the central hole (20) of the burner head (21) so as to project upward.
As shown in FIG. 2, the heat shield (1) has a contact portion between the heat sensitive element (30) of the heat sensitive member (3) and the projecting end face (33a) of the heat sensitive portion (33) over the entire area in the circumferential direction. It is composed of a cylindrical body (10) that surrounds it, and four locking pieces (11) that project downward from the lower end of the cylindrical body (10) at intervals of 90 degrees in the circumferential direction.
The locking piece (11) is bent from the lower end of the tubular body (10) so as to project outward from the outer peripheral surface of the tubular body (10), and the maximum projecting portion (11a) of the locking piece (11). Then, the burner head (21) is fitted in the central hole (20) in a manner of pressing the inner peripheral edge of the upper end region of the central hole (20), and at the stepped portion (11b) provided below the maximum protruding portion (11a). ) Is locked to the projecting piece (24) projecting inward in the central hole (20).
Thus, the heat shield (1) is detachably set from above the burner head (21).
遮熱体(1)を、上記要領で中央孔(20)に装着させた状態にて、筒体(10)の外周面と中央孔(20)の内周縁との間には、筒体(10)の外周面と係止片(11)の最大突出部(11a)の外面との差異に相当する幅の隙間(S1)が形成される。また、隣接する係止片(11)の間には、中央孔(20)からバーナヘッド(21)の上面へ向かう空気流路を形成する空気通過部(10a)が形成される。 With the heat shield (1) attached to the central hole (20) as described above, the cylindrical body (10) is provided between the outer peripheral surface of the cylindrical body (10) and the inner peripheral edge of the central hole (20). A gap (S1) having a width corresponding to the difference between the outer peripheral surface of 10) and the outer surface of the maximum protruding portion (11a) of the locking piece (11) is formed. Further, an air passage portion (10a) that forms an air flow path from the central hole (20) to the upper surface of the burner head (21) is formed between the adjacent locking pieces (11).
ガスバーナ(2)の下方から送られてくる外部からのフレッシュエアーは、図２の二点鎖線に示す矢印のように、中央孔(20)の内周面と感熱部材(3)の円筒ケースの外周面との間に形成される環状の空間部分(S2)を通って、筒体(10)内へ流れていき、その上方の釜底下面(32a)に向かう。特に、この実施の形態では、被感熱部(33)は、釜底下面(32a)の中央部から下方に突設されており、感熱部材(3)の感熱素子(30)が接触する被感熱部(33)の突出端面(33a)の周囲を覆うように筒体(10)が設けられているから、被感熱部(33)と感熱部材(3)の感熱素子(30)との接触部分、及び、被感熱部(33)に連続する釜底下面(32a)の中央近傍域をフレッシュエアーで全域的に積極的に冷却することができる。その後、フレッシュエアーは、バーナヘッド(21)上の内向き炎孔(22)及び外向き炎孔(23)へ二次空気として送られていく。
また、筒体(10)は、上記したように、感熱部材(3)の感熱素子(30)が接触状態にある被感熱部(33)を包囲しているから、外風によって火炎が内向きに流れた場合でも、被感熱部(33)と感熱素子(30)との接触部に火炎が流れるのを防止できる。
The fresh air from the outside sent from below the gas burner (2), as shown by the arrow indicated by the chain double-dashed line in Fig. 2, is discharged from the inner peripheral surface of the central hole (20) and the cylindrical case of the heat-sensitive member (3). It flows into the cylindrical body (10) through an annular space (S2) formed between itself and the outer peripheral surface, and goes to the bottom surface (32a) of the pot bottom above it. In particular, in this embodiment, the heat-sensitive portion (33) is provided so as to project downward from the central portion of the bottom surface (32a) of the pot bottom, and the heat-sensitive element (30) of the heat-sensitive member (3) contacts the heat-sensitive portion. Since the cylindrical body (10) is provided so as to cover the periphery of the protruding end surface (33a) of the portion (33), the contact portion between the heat-sensitive portion (33) and the heat-sensitive element (30) of the heat-sensitive member (3). Further, the area near the center of the bottom surface (32a) of the bottom of the pot that is continuous with the heat-sensitive portion (33) can be positively cooled entirely by fresh air. Thereafter, the fresh air is sent to the inward flame holes (22) and the outward flame holes (23) on the burner head (21) as secondary air.
Further, as described above, since the tubular body (10) surrounds the heat-sensitive part (33) in contact with the heat-sensitive element (30) of the heat-sensitive member (3), the flame is directed inward by the outside wind. Even when it flows to the inside, it is possible to prevent the flame from flowing to the contact portion between the heat-sensitive portion (33) and the heat-sensitive element (30).
また、筒体(10)の外周面と中央孔(20)の内周縁との間には、隙間(S1)が形成されているから、空間部分(S2)を通ったフレッシュエアーの一部は、隣接する係止片(11)間に形成される空気通過部(10a)から、隙間(S1)を通って、バーナヘッド(21)の上面へ流れる。特に、隙間(S1)から外方へ流れ出たフレッシュエアーは、内向き炎孔(22)へ直接流れていくから、内向き炎孔(22)に、二次空気として確実に送ることができる。これにより、バーナヘッド(21)に均一な火炎を形成することができ、釜底下面(32a)を均一に加熱することができる。
なお、隙間(S1)は、筒体(10)の内周面と感熱部材(3)との間に形成される隙間よりも狭いから、フレッシュエアーは、筒体(10)の上方へ、より多く流れていく。隙間(S1)から内向き炎孔(22)の二次空気用としてフレッシュエアーの一部を流しても、感熱部材(3)の感熱素子(30)が接触する被感熱部(33)や、釜底下面(32a)のフレッシュエアーによる冷却が妨げられることはない。
Further, since a gap (S1) is formed between the outer peripheral surface of the cylindrical body (10) and the inner peripheral edge of the central hole (20), a part of the fresh air passing through the space portion (S2) is , Through the gap (S1) from the air passage portion (10a) formed between the adjacent locking pieces (11) to the upper surface of the burner head (21). In particular, the fresh air flowing out from the gap (S1) flows directly to the inward flame holes (22), so that it can be reliably sent to the inward flame holes (22) as secondary air. As a result, a uniform flame can be formed on the burner head (21), and the bottom surface (32a) of the bottom of the pot can be heated uniformly.
Since the gap (S1) is narrower than the gap formed between the inner peripheral surface of the tubular body (10) and the heat-sensitive member (3), the fresh air is more likely to rise above the tubular body (10). Many flows. Even if a part of the fresh air is used as the secondary air for the inward flame hole (22) from the gap (S1), the heat-sensitive part (33) with which the heat-sensitive element (30) of the heat-sensitive member (3) contacts, or Cooling of the bottom surface (32a) of the pot bottom with fresh air is not hindered.
図３は、ガスバーナ(2)の燃焼時間と感熱部材(3)の感熱素子(30)が検知する検知温度との関係を示すグラフであり、検知温度１３３℃を炊き上がり温度としてガスバーナ(2)を消火させる構成としたときの温度変化を示している。
図中、一点鎖線は、炊飯中、炊飯釜(32)の釜底上面中央部におねばや糠等による沈殿物(44)を殆ど堆積させない正常な状態で加熱したときの温度変化を、二点鎖線は、遮熱体(1)が装着されていないバーナヘッド(21)を用い、炊飯釜(32)の釜底上面中央部に多量の沈殿物(44)を堆積させて加熱したときの温度変化を、実線は、本実施の形態の遮熱体(1)が装着されているバーナヘッド(21)を用い、炊飯釜(32)の釜底上面中央部に多量の沈殿物(44)を堆積させて加熱したときの温度変化を示す。
なお、遮熱体(1)は、筒体(10)の内周面と感熱部材(3)との間の隙間を７ｍｍ、筒体(10)の外周面と係止片(11)の最大突出部(11a)の外面との差異が1．８ｍｍに設定したものを用いた。
FIG. 3 is a graph showing the relationship between the combustion time of the gas burner (2) and the detection temperature detected by the heat-sensitive element (30) of the heat-sensitive member (3). The detection temperature of 133° C. is used as the heating temperature for the gas burner (2). It shows the temperature change when it is configured to extinguish.
In the figure, the alternate long and short dash line indicates the temperature change during rice cooking, when the rice cooker (32) is heated in a normal state in which almost no sediment (44) due to sticks or bran is accumulated on the center of the upper surface of the bottom of the rice cooker. The dashed-dotted line indicates the value obtained when a large amount of precipitate (44) is deposited and heated in the center of the upper surface of the bottom of the rice cooker (32) using the burner head (21) without the heat shield (1) attached. For the temperature change, the solid line uses the burner head (21) equipped with the heat shield (1) of the present embodiment, and a large amount of sediment (44) is formed in the central portion of the upper surface of the bottom of the rice cooker (32). 3 shows the temperature change when the is deposited and heated.
In the heat shield (1), the gap between the inner peripheral surface of the cylindrical body (10) and the heat sensitive member (3) is 7 mm, and the maximum distance between the outer peripheral surface of the cylindrical body (10) and the locking piece (11). The difference between the protrusion (11a) and the outer surface was set to 1.8 mm.
炊飯中、炊飯釜(32)の釜底上面中央部に沈殿物の堆積が少なければ、炊飯中の炊飯釜(32)内で円滑な対流が生じるから、図３の一点鎖線に示すように、沸騰までゆっくりと温度が上昇し、また炊き上がり前の炊飯釜(32)内に水がある間、水の沸騰温度の１００℃近傍で一定時間、加熱される。このため、感熱部材(3)の感熱素子(30)で検知される検知温度に基づいてガスバーナ(2)が消火されるように設定しておくことにより、一定の加熱時間を確保できる。 During rice cooking, if there is little accumulation of sediment in the central portion of the upper surface of the bottom of the rice cooker (32), smooth convection will occur in the rice cooker (32) during rice cooking, as shown by the chain line in FIG. While the temperature rises slowly until boiling and there is water in the rice cooker (32) before cooking, it is heated for a certain time at around 100° C., which is the boiling temperature of water. Therefore, by setting the gas burner (2) so as to extinguish the fire based on the temperature detected by the heat sensitive element (30) of the heat sensitive member (3), a constant heating time can be secured.
これに対し、炊飯中の炊飯釜(32)内の対流によって、おねばや糠等による沈殿物(44)が炊飯釜(32)の釜底上面中央部に大量に堆積すると、この部分で対流が妨げられ、局部加熱状態となり易い。その結果、感熱部材(3)の感熱素子(30)が接触する被感熱部(33)の温度が、釜底下面(32a)の他の部分の温度よりも高くなって、図３の二点鎖線に示すように、短時間で、検知温度が炊き上がり温度まで上昇する。このため、ガスバーナ(2)の燃焼が自動停止してしまい、早切れの問題が生じる。特に、大型のガス炊飯器である場合、沈殿物(44)の堆積が多くなるために、上記問題が顕著となり易い。 On the other hand, due to convection in the rice cooker (32) during rice cooking, when a large amount of sediment (44) due to bean or rice bran accumulates in the central part of the upper surface of the bottom of the rice cooker (32), convection occurs in this part. Is likely to be disturbed and local heating is likely to occur. As a result, the temperature of the heat-sensitive portion (33) with which the heat-sensitive element (30) of the heat-sensitive member (3) comes into contact with the heat-sensitive member (3) becomes higher than the temperature of other portions of the bottom surface (32a) of the pot bottom, and the two points in FIG. As indicated by the chain line, the detected temperature is cooked and rises to the temperature in a short time. Therefore, the combustion of the gas burner (2) is automatically stopped, which causes a problem of premature disconnection. In particular, in the case of a large-sized gas rice cooker, the above-mentioned problem is likely to be remarkable because the sediment (44) is often accumulated.
しかしながら、バーナヘッド(21)に遮熱体(1)が装着されたガスバーナ(2)を用いた場合、図３の実線に示すように、炊飯釜(32)の釜底上面中央部に多量の沈殿物(44)が堆積しても、遮熱体(1)が設けられていない場合に比べて、沸騰までの時間を長くすることができる。これは、筒体(10)と感熱部材(3)の間の空間部分(S2)を流れるフレッシュエアーによって、感熱部材(3)の感熱素子(30)が接触する被感熱部(33)が冷却されるためである。 However, when the gas burner (2) having the heat shield (1) attached to the burner head (21) is used, as shown by the solid line in FIG. Even if the precipitate (44) is deposited, the time until boiling can be lengthened as compared with the case where the heat shield (1) is not provided. This is because the fresh air flowing through the space (S2) between the tubular body (10) and the heat-sensitive member (3) cools the heat-sensitive part (33) with which the heat-sensitive element (30) of the heat-sensitive member (3) contacts. Because it is done.
また、遮熱体(1)を用いた場合、沈殿物の堆積の少ない場合よりも沸騰温度に短時間で達するが、沸騰温度を超えると、一旦温度降下が生じ、炊き上がり温度までは一定時間、加熱されることが分かる。これは、釜底上面中央部に大量の沈殿物(44)が堆積すると共に、釜底下面(32a)の中央部が局部加熱状態となると、沈殿物(44)の固形化が進み、温度上昇が促進されるが、遮熱体(1)を設けて感熱部材(3)の感熱素子(30)が接触する被感熱部(33)をフレッシュエアーで積極的に冷却することにより、沈殿物(44)の固形化が遅れ、沸騰中に釜底上面から発生する気泡で沈殿物(44)の膜が破壊されるためである。その結果、釜底下面(32a)の中央部での局部加熱状態が低減され、炊き上がり温度まで一定の加熱時間を確保できる。しかも、遮熱体(1)には、中央孔(20)からバーナヘッド(21)の上面に流れる空気流路も形成されているから、内向き炎孔(22)及び外向き炎孔(23)への二次空気も確保でき、釜底下面(32a)全体を均一に加熱できる。これにより、良質な炊き上がりの米飯を提供できる。 In addition, when the heat shield (1) is used, the boiling temperature is reached in a shorter time than in the case where the amount of deposits is small, but once the boiling temperature is exceeded, a temperature drop occurs once and the boiling temperature reaches a certain time. You can see that it is heated. This is because a large amount of precipitate (44) accumulates in the central part of the upper surface of the bottom of the kettle, and when the central part of the lower surface (32a) of the bottom of the kettle becomes locally heated, solidification of the precipitate (44) progresses and the temperature rises. However, the heat shield (1) is provided to positively cool the heat-sensitive part (33) with which the heat-sensitive element (30) of the heat-sensitive member (3) is in contact with fresh air, so that the precipitate ( This is because the solidification of 44) is delayed, and the film of the precipitate (44) is destroyed by the bubbles generated from the upper surface of the bottom of the kettle during boiling. As a result, the local heating state in the central portion of the bottom surface (32a) of the pot bottom is reduced, and a constant heating time can be secured up to the cooked temperature. Moreover, since the heat shield (1) is also formed with an air flow path flowing from the central hole (20) to the upper surface of the burner head (21), the inward flame hole (22) and the outward flame hole (23 Secondary air to (3) can be secured, and the entire bottom surface (32a) of the bottom of the pot can be uniformly heated. This makes it possible to provide high-quality cooked rice.
なお、図３では図示していないが、特許文献２の均熱板を用いた場合、遮熱体(10)を用いなかった二点鎖線と同様に短時間内に検知温度が炊き上がり温度まで上昇し、早切れの問題が生じた。
Although not shown in FIG. 3, when the heat equalizing plate of
なお、上記実施の形態では、遮熱体(1)は、バーナヘッド(2)と別体で設けられているが、バーナヘッド(21)の中央孔(20)の周縁に一体的に設ける構成としても良い。 In the above embodiment, the heat shield (1) is provided separately from the burner head (2), but it is provided integrally with the peripheral edge of the central hole (20) of the burner head (21). Also good.
図４及び図５は、他の実施形態を示す概略構成図である。
図４の遮熱体(1)は、上記実施の形態と同様な形状を呈しているが、炊飯釜(320)の釜底下面(320a)は平面状に形成されており、その中央部に感熱部材(3)の感熱素子(30)を接触させている。このため、筒体(10)は、感熱部材(3)の感熱素子(30)が接触する被感熱部(330)を覆っていないが、このような炊飯釜(320)を用いる場合でも、バーナヘッド(21)の中央孔(20)から遮熱体(1)の筒体(10)の上方へ流れるフレッシュエアーで、感熱部材(3)の感熱素子(30)が接触する炊飯釜(320)の釜底下面(320a)の被感熱部(330)を冷却できる。
4 and 5 are schematic configuration diagrams showing another embodiment.
The heat shield (1) of FIG. 4 has the same shape as that of the above-mentioned embodiment, but the bottom surface (320a) of the bottom of the rice cooker (320) is formed in a flat shape, and its central portion is formed. The heat sensitive element (30) of the heat sensitive member (3) is in contact. Therefore, the tubular body (10) does not cover the heat-sensitive part (330) with which the heat-sensitive element (30) of the heat-sensitive member (3) comes into contact, but even when such a rice cooker (320) is used, Rice cooker (320) in which the heat-sensitive element (30) of the heat-sensitive member (3) comes into contact with fresh air flowing from the central hole (20) of the head (21) to above the cylindrical body (10) of the heat shield (1) The heat-sensitive part (330) on the bottom surface (320a) of the pot bottom can be cooled.
また、図５の遮熱体(12)は、中央孔(20)の内周縁よりも外側に位置するバーナヘッド(21)の上面所定位置から上方に延設された筒体(13)と、筒体(13)の下方に延設された４つの係止片(14)とからなり、係止片(14)を、バーナヘッド(21)の上面所定位置に設けた４つの係止孔(25)に各々係止させることにより、装着可能としたものである。
このものでは、筒体(13)の下端とバーナヘッド(20)の中央孔(20)の開放端との間に、前記第２の空気流路となる隙間(S3)が形成される構成としている。このような、遮熱体(12)を用いる場合でも、中央孔(20)から筒体(13)の上方に流れるフレッシュエアーにより感熱部材(3)の感熱素子(30)が接触する被感熱部(330)を冷却できる。また、隙間(S3)からバーナヘッド(21)の上面に二次空気を流すことができる。
また、図示しないが、係止片を設けない筒体を、遮熱体としてバーナヘッド(20)の中央孔(20)に設置してもいいが、この場合、中央孔(20)の上方開放端に対応する筒体の所定個所に、複数の貫通孔を形成して、空気通路部としておけばよい。
The heat shield (12) of FIG. 5 includes a tubular body (13) extending upward from a predetermined position on the upper surface of the burner head (21) located outside the inner peripheral edge of the central hole (20). It is composed of four locking pieces (14) extending below the cylindrical body (13), and the locking pieces (14) are provided at four predetermined positions on the upper surface of the burner head (21). It can be attached by locking it to 25).
In this structure, a gap (S3) serving as the second air flow path is formed between the lower end of the cylindrical body (13) and the open end of the central hole (20) of the burner head (20). There is. Even when such a heat shield (12) is used, the heat-sensitive part where the heat-sensitive element (30) of the heat-sensitive member (3) comes into contact with the fresh air flowing from the central hole (20) to the upper side of the cylindrical body (13). Can cool (330). In addition, secondary air can flow from the gap (S3) to the upper surface of the burner head (21).
Although not shown, a cylinder without a locking piece may be installed in the central hole (20) of the burner head (20) as a heat shield, but in this case, open the central hole (20) upward. A plurality of through holes may be formed in a predetermined portion of the cylindrical body corresponding to the end to serve as an air passage portion.
(1) ・・・・・・・・・遮熱体
(10a) ・・・・・・・・空気通過部
(2) ・・・・・・・・・ガスバーナ
(20)・・・・・・・・・中央孔
(21)・・・・・・・・・バーナヘッド
(3) ・・・・・・・・・感熱部材
(32)・・・・・・・・・炊飯釜
(32a) ・・・・・・・・釜底下面
(1) ・・・・・・・Heat shield
(10a) ・・・・・・Air passage part
(2) ・・・・・・・Gas burner
(20)・・・・・・Center hole
(21)・・・・・・・・Burner head
(3) ・・・・・・・Heat sensitive material
(32)・・・・・・・・Steel cooker
(32a) ・・・・・・Bottom bottom surface
Claims (2)
前記炊飯釜の釜底下面中央部に、前記感熱部材が接触する被感熱部が下方に突設されており、
前記中央孔の周縁又はその近傍から、前記感熱部材を囲むように遮熱体が上方に向かって延設され、
前記遮熱体は、前記感熱部材と前記被感熱部との接触部を包囲するように設けられており、
前記感熱部材の上端に設けられる感熱素子は、前記遮熱体に包囲される高さに位置し、
前記遮熱体の上端は前記炊飯釜の釜底下面よりも下方に位置するように設定されていると共に、前記中央孔の開放端近傍に対応する前記遮熱体の所定位置には空気通過部が設けられているガス炊飯器。 A rice cooker, a gas burner having an annular burner head installed below the rice cooker and having a central hole, and a lower surface of the cooker bottom located in the central hole and in contact with the lower bottom of the rice cooker In a gas rice cooker having a heat-sensitive member for detecting the temperature of
In the central portion of the bottom surface of the bottom of the rice cooker, a heat-sensitive part with which the heat-sensitive member comes into contact is projected downward.
From the periphery of the central hole or in the vicinity thereof, a heat shield is extended upward so as to surround the heat sensitive member,
The heat shield is provided so as to surround the contact portion between the heat sensitive member and the heat sensitive portion,
The heat sensitive element provided at the upper end of the heat sensitive member is located at a height surrounded by the heat shield,
The upper end of the heat shield is set to be located below the bottom surface of the bottom of the rice cooker, and an air passage portion is provided at a predetermined position of the heat shield near the open end of the central hole. Gas rice cooker equipped with.
前記係止片は前記中央孔の周縁又はその近傍に係止されると共に、隣接する前記係止片間に前記空気通過部が形成されるガス炊飯器。 The gas rice cooker according to claim 1, wherein the heat shield is a tubular body having a diameter larger than that of the heat-sensitive member and opening vertically, and a plurality of engaging members extending downward from a lower end edge of the tubular body. Has a stop,
The gas rice cooker in which the locking piece is locked at or near the periphery of the central hole, and the air passage portion is formed between the adjacent locking pieces.
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