Foods and beverages: apparatus – Electric – radiant or vibrational treating means
Patent
1997-02-07
1999-01-19
Simone, Timothy F.
Foods and beverages: apparatus
Electric, radiant or vibrational treating means
99331, 99333, 99340, 99358, 99403, 99468, 99473, 99483, A23L 100, A47J 2700, A47J 2704, F27D 1102
Patent
active
058603590
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
It is generally difficult, although desirable, to provide an apparatus for selectively control oxygen concentration and steam in the atmosphere gas within a food preserving container, indoors or the like. There remains room undeveloped as a method of keeping boiled rice although the art of cooking the rice is considerably improved. For example, the rice cooker for cooking the rice and keeping it warm is developed in recent years in rice cooking.cndot.warming mechanism applying Neuro Fuzzy theory so that rice can be cooked as tasty as possible and thereafter, the cooked rice can be kept in a tasty condition. The rice can be cooked tasty, kept tasty by the warming pot by the application of the induction heater (I.multidot.H). The cooked rice enters into a warmth keeping condition. Thereafter, the cooked rice is taken cut after the cover has been opened, and the remaining rice is retained again in a warm keeping condition. When the cooked rice is taken out after several hours, the rice becomes often yellow in tint, causing the unplesant smells. The cooked rice becomes untasty because of oxidization caused in it although in the keeping condition.
A direct oxidizing prevention of the cooked rice is not realized although a method of keeping the cooked rice in a condition as good as possible by the adjustment of the warmth keeping temperature is considered. A means for removing the oxygen of the warmth keeping pot is proposed in Japanese Patent Application (unexamined) No. 5-154039 as shown in FIG. 9 wherein 1 denotes an rice boiler, 32 a lid, 33 an inner pot, 34 an angle, 35 a heater, 38 an inner lid, 39 an intake pipe, 40 an opening, 41 a valve, 42 a separating film, 43 an opening and 44 a vacuum device. The means is composed of gas separating films through which only oxygen is transmitted, and a pressure reducing apparatus (mechanical pump). A method of discharging the oxygen existing within the warmer pot out of the warmer is proposed. However, the rice cooker proposed above has the following problems. A valve apparatus, gas separating films, a pressure reducing apparatus are provided within the cover body, resulting in bigger cover body, increasing the weight thereof, thus interfering with the opening, closing operations of the cover body. There are problems such as performance deterioration due to dewing on the gas separating films, the operation noises of the pressure reducing apparatus and so on. Further, it is difficult to put the apparatuses into practical use without provision of a means for taking measures with respect to the pressure reducing condition in the case of the oxygen discharging. Also, although an oxygen pump using a perovskite type of oxide is proposed in Japanese Laid-Open Patent Application Tokkaisho No. 56-134502, a system to be driven by optical application is not much practical.
SUMMARY OF THE INVENTION
A first object of the present invention is to provide a gas-permselective gas pump which selectively transmits oxygen gas in an atmosphere containing several kinds of gas to control the oxygen gas concentration, if necessary, oxygen gas and steam in the atmosphere to control the oxygen and the steam concentration in the atmosphere.
The inventors have found, after serious researches that oxide ions (O.sup.2-) are selectively permeated to one side of the solid electrolyte (the anode side) from the other side (the cathode side) through the solid electrolyte, while protons (H.sup.+) are selectively permeated to the cathode side from the anode side through the solid electrolyte when the solid electrolyte is heated to a constant operating temperature. Therefore, we have found that the oxygen gas is electrolytically reduced on the cathode side by using a pair of electrodes placed on both sides of the solid electrolyte, the oxide ions produced are permeated from the anode to the cathode through the solid electrolyte, and thereafter, are oxidized on the anode side to return to the oxygen gas again. That is, as a result, the oxygen gas can be selectively discharg
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Gamou Takaharu
Mori Kunihito
Takahashi Yasuhito
Taniguchi Noboru
Yasumoto Eiichi
Matsushita Electric - Industrial Co., Ltd.
Simone Timothy F.
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