JPH03215223A - Pressure vessel for electronic range - Google Patents

Abstract

PURPOSE:To enable pressure cooking to be performed with an electronic range, and enable a device to be economically manufactured with injection molding by heaping up a main body vessel and a cover body manufactured with the thermoplastic heat- proof resin of the permittivity of 5.0 or less including glass fibers, to be engaged with each other, and by sealing the device via a packing. CONSTITUTION:A main body vessel 1 manufactured with the thermoplastic heat-proof resin of the permittivity of 0.5 or less including glass fibers, and an internal vessel 6 inside the main body vessel are arranged, and have a cover body 11 provided with a pressure regulating valve 12 and a safety valve 13, and a packing 14 set inside the cover body and the main body vessel. A metallic band 7 is fitted on the cover body 11, and the engaging piece 5 of the main body vessel 1 and the engaging piece 9 of the metallic band are engaged with each other, and a pressure vessel is formed via the packing 14. For the pressure vessel, the thermoplastic heat-proof resin of the permittivity of 0.5 or less is used, and so, when a food including water (permittivity 80) in particular is microwave-heated, the pressure vessel is not so much heated while the water is heated, and pressure cooking can be performed. Besides, as the thermoplastic heat-proof resin is used, the device can be economically produced with injection molding.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is an electronic container used in a microwave oven, which can be used for cooking at high temperature and pressure by increasing the internal pressure of the main container, and can also be used for sterilization. This invention relates to a pressure vessel for microwave ovens.

2. Description of the Related Art Various heating containers have been proposed for cooking food by placing it in a microwave oven, but there are few that can cook food at high temperatures and pressures. However, this does not mean that there are no such products at all, and products such as those manufactured by Nordic Ware in the United States are gaining popularity due to their short cooking time. This product uses unsaturated polyester resin reinforced with glass fibers to construct the container body and lid.

Problems that the invention aims to solve Conventional technology had three basic problems.

One is the problem of cooking time.The cooking time is set using a timer, but pressure vessels and microwave ovens are not specialized.
It is necessary to determine the cooking time by trial and error depending on the power of the microwave oven, and there may actually be undercooking. Since there was a lot of over-the-counter cooking, it was difficult to determine the optimal cooking time.

Since this point is not directly related to the present invention, it will not be discussed further. The second point is that since the container is BMC molded using glass fiber reinforced unsaturated polyester resin, productivity is poor and it is expensive. Third, since the glass fibers are exposed on the surface of the container, the surface is permeable to liquid and is easily contaminated with seasonings and other substances. In fact, when various types of cooking are repeated, the container becomes contaminated and odors are transferred.

In addition, there was also the problem that water vapor was likely to diffuse into the interior, resulting in a decrease in strength.

Means for Solving the Problems In order to solve the above problems, the present invention includes a main body container made of a thermoplastic heat-resistant resin containing glass fiber and a dielectric constant of 5.0 or less, and a glass fiber inside the main container. A lid body comprising an inner container containing no filler, a pressure regulating valve and a safety valve, and a packing disposed inside the lid body and the main container, and the main container and the lid body are overlapped. Then, the retaining piece and the front locking piece are engaged by relative rotational displacement between the two, and the main body container and the lid body are hermetically sealed via the packing, thereby forming a pressure vessel for a microwave oven. use

Function The pressure vessel of the present invention uses a thermoplastic heat-resistant resin with a dielectric constant of 5.0 or less, so food, especially water (water has a dielectric constant of 8.
When 0) is placed inside and heated in the microwave, the water is heated without heating the pressure vessel too much, allowing pressure cooking. Furthermore, even if the container is misused without food being put inside, the container itself will not be heated to a very high temperature, making it safe.

Since the pressure vessel of the present invention uses a thermoplastic heat-resistant resin, it can be produced at low cost by injection molding. By selecting the molding conditions when injection molding the thermoplastic heat-resistant resin, it is also possible to form a resin skin layer on the surface of the glass fiber reinforced molded product. BM of thermosetting resin
Although the surface is much smoother than that of the C-molded product, it is still free from food stickiness, so the provision of an inner container completely protects against contamination from food, seasonings, etc. The inner container does not need to maintain mechanical strength, so it can be selected based on ease of use, such as non-adhesiveness. Therefore, the problem of odor transfer is solved.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. 1st
The figure shows a pressure vessel according to the present invention, including a main container 1 and an inner container 6 housed within the main container 1 and into which food to be cooked is placed.
and a lid l2 that seals the opening 2 of the container. The main container 1 and the lid 12 are made of thermoplastic heat-resistant resin containing glass fiber, such as polyphenylene sulfide resin, polysulfone resin, polyether sulfone resin, polyether ether ketone resin, various liquid crystal polymers, and alloys thereof. It is molded with. The inner container 6 is made of a molded resin such as polyether sulfone resin or fluororesin, which is less likely to contaminate seasonings and foods and is heat resistant. Thereby, there is no concern that the main container 1 will be contaminated by food or the like. The wall thickness of the inner container 6 may be 1/5 to 1/10 of the wall thickness of the main container 1. From the viewpoint of dirt retention, it is desirable that the inner container 6 be made of fluororesin. The main body container I is provided with a handle 3.4 on the upper outer wall, and a plurality of retaining pieces 5 are provided on the periphery of the opening 2 at intervals in the circumferential direction. The lid body 11 is provided with a flange 10 for stopping the flange 8 of the metal band 7, a pressure regulating valve l2, and a safety valve 13.

With the ring-shaped packing 14 arranged inside the main container 1 and the metal band 7 attached to the lid 11, the lid I1
By overlapping the main body container 1 and rotating them relatively, the engaging piece 5 of the main body container 1 and the retaining stop 9 of the metal band are engaged, and the pressure vessel is formed. The height of the inner container 6 is lower than that of the main container 1, and has no relation to the attachment of the packing 14. safety valve l3
As the pressure regulating valve 12, those conventionally used in pressure cookers can be used. Although not described in the present invention, an indicator, a safety tube, etc. may also be arranged on the lid 1l, if necessary. Put the food into the inner container of this pressure container, put it in the microwave oven with the container in the stent state,
When heated with microwaves, the food is heated and boils because the dielectric constant of the food is much higher than that of the main container. As heating continues, the internal pressure inside the pressure vessel increases. Pressure cooking is performed at a temperature where the pressure of the pressure regulating valve and the internal pressure are balanced. This point is exactly the same as a conventional pressure cooker.

Effects of the Invention As explained above, the pressure vessel of the present invention has the same functions as a normal pressure cooker. In other words, the cooking time is faster. The food is cooked right down to the inside, allowing fish and other foods to be eaten with their bones intact, making it possible to provide a very healthy cooking menu for modern people who are deficient in calcium. Benefits include: Also, although not related to the present invention, by combining a microcomputer and sensor system commonly used in recent microwave ovens, it is possible to automatically cook food even during difficult cooking times using pressure cooking. Pressure cooking can be a little scary since steam is emitted during cooking, but doing this inside the microwave oven has the advantage of giving you a sense of security. The above are the general effects of pressure cooking in a microwave oven.

In particular, with the present invention, the food comes into contact with the inner container, which has less contamination, so there is no food sticking and cleaning up after cooking is easy. There are no problems with odor transfer, and it is extremely hygienic. In addition, pressure vessels are made by injection molding, which makes it possible to obtain high-quality products at low cost and with high dimensional accuracy.

In addition, even if microwave heating is performed without a load due to misuse, the container is safe and will not be heated to harmful high temperatures, so you can rest assured.

[Brief explanation of drawings]

The figure is an exploded perspective view of a pressure vessel for a microwave oven according to an embodiment of the present invention. 1... Main container, 2... Opening, 3, 4
...Handle, 5...Engagement piece, 6...
...Inner container, 7...Metal band, 9...
-Latching piece, 11... Lid, 12... Pressure adjustment valve, 14... Bassokin.

Claims (2)

[Claims] (1) A main container made of thermoplastic heat-resistant resin with a dielectric constant of 5.0 or less that contains glass fiber, an inner container that does not contain glass fiber or filler provided in the main container, and a pressure A lid body including a regulating valve and a safety valve, a packing disposed inside the lid body and the main body container, and the main body container and the lid body are overlapped and engaged, and through the packing. A pressure container for a microwave oven that seals the main container and the lid. (2) The pressure vessel for a microwave oven according to claim 1, wherein a fluororesin is used as the inner container.