Design Explained –
Micom Intelligence

“Inspirations from everyday life” is at the core of our business. And for the large majority of Japanese, cooking rice is at the center of their daily activities, a task that involves sourcing, washing, soaking, cooking, steaming, fluffing and serving short-grained, perfectly cooked Japanese rice.

We’ve created an amazing line up of rice cookers to help with this everyday task, and this month in our Design Explained series, we talk about the benefits of our Micom rice cookers.

First of all, what is a rice cooker? A rice cooker is an electric machine that automates parts of the process for cooking rice. Traditionally, rice has been cooked in a pot, with water, over a flame. With a rice cooker, the steps that convert the hard rice kernel into a fluffy, edible staple is automated. Conventional rice cookers, which are the most basic type of rice cookers, simply boil rice, managing turning off when there is no water left in the pot. Our Micom rice cookers, however, automate soaking, cooking and steaming. Our Micom rice cooker that include induction heating and a combination of induction heating and pressure apply additional technologies to prepare perfect rice.

But what really is Micom and how does it work?

Micom is an abbreviation of “microcomputer”, meaning that a microcomputer is built into the rice cooker to control the rice cooking process.

The microcomputer, in this instance, works to automate as much of the cooking process as possible, so that only washing before and fluffing after are manual tasks. With a conventional rice cooker, the cook would have to manage washing the rice, the soaking time, monitor how it steams after boiling, and fluff prior to serving as well. In fact, there is a Japanese saying that explains the benefit of the microcomputer’s work:

Hajime choro-choro Naka pa-ppa Akago naite mo Futa toruna!” meaning “At first it bubbles, and then it hisses. Even if the baby cries, don’t open the lid!” It’s so much easier to let the Micom rice cooker do the work, and better yet, do it on a timer, so that it’s done in one efficient shot.

Our Micom rice cookers also create ideal cooking environments for various types of rice and rice dishes. For example, many of our rice cookers have a setting for sushi rice, which the microcomputer knows to cook for a specific time and at a specific temperature so that it cooks to the required firmness. Some of our rice cookers also have a setting for GABA Brown Rice, which adjusts the soaking time and temperature to increase GABA (gamma-aminobutyric acid) in brown rice. And they have a setting for porridge, which ensures that the extra water needed to make the soupy rice doesn’t boil over.

Which Zojirushi rice cooker do you have? And have you made the two main staples of Japanese cuisine – White Rice and Brown Rice – following our recipes? Let us know in the comments below!

Design Explained –
Our Easy-Release Magnetic Power Cord

Our Gourmet d’Expert® Electric Skillets (EP-RAC50 and EP-PBC10) and our water boilers are designed with a unique feature that keeps them powered up and safe: our magnetic power cord.

Magnetic power cords are ubiquitous when it comes to laptops, mobile devices and other tech products, but we’ve used these types of power cords in our products since 1982, when we introduced them in a new water boiler for the Japanese market.

Since then, we realized that adding magnetic power cords to most of our water boilers and electric skillets was the smart thing to do, because both of these categories of products tend to contain large amounts of heated liquid. Imagine if you walked by a full water boiler that was resting on a countertop, snagged your foot on the power cord, and toppled the water boiler over. The result would be quite scary. Same goes for our skillets, which are so convenient for cooking at the table. In the event of a snag by a foot or chair, the power cord would detach, preventing the skillet from being pulled from the table.

So convenient is this design that we even get phone calls from customers saying “My power cord is broken!” While the magnets that hold the power cord attached to the skillets or water boilers are strong, they’re made to detach easily. No tugging is required, making this design both smart and safe. As an added bonus, the magnet also makes the power cord easy to attach too!

Check out our water boilers, skillets and other great products in the Products section of our website, and be sure to comment with any questions you might have.

Design Explained –
Our Steam Vent Caps

Do you know that most of our rice cookers have a cap on the steam vent? Compared to conventional rice cookers, our advanced rice cookers – the ones that utilize a microcomputer – are sleeker, with tight-fitting components and lids. We make these rice cookers with steam venting systems that consists of three components – a vent, a vent cap, and a vent cap receptacle.

This is the Steam Vent Cap!

Each piece of the venting system has a purpose. The vent is a tube-like opening that goes through the cover and inner lid, into the body of the rice cooker where the inner pan rests. The vent is covered by the steam vent cap, which rests in the steam vent cap receptacle, keeping it securely on the cover of the rice cooker. The entire system is built to seamlessly blend into the top of the rice cookers. One customer even brought his appliance into our office inquiring about the system because he didn’t realize it was there!

Can you spot the Steam Vent Cap?

The steam venting system works in conjunction with good rice prep. The first step is to correctly measure the right amount of rice and water. Then, it’s important to wash the rice correctly, removing excess starch and bran or dust from the rice kernels. Once the rice begins cooking, the rice cooker releases excess steam through the vent, and the steam vent cap catches any foamy substances that come out with the steam. The rice cooks better this way because the steam vent cap allows the rice cooker to cook your rice at a higher heat, without worrying about overflow because the steam vent cap can capture excess moisture and bubbles that may foam up.

Yay for delicious rice!

As long as the vent cap is washed under running water and the steam vent cap receptacle area is wiped with a soft cloth to remove any moisture, the steam venting system in your Zojirushi advanced rice cooker should work wonderfully. Remember to remove and clean the inner lid and you’ll have perfectly cooked rice every time!

Don’t forget to remove and clean the Inner Lid!

Check out our full line up in the Products section, and be sure to comment with any questions you might have.


Design Explained – Our Superior Vacuum Insulation

Zojirushi has been in the vacuum insulation business for over 100 years! The company opened its doors in Osaka as the Ichikawa Brothers Trading Company in 1918 manufacturing vacuum liners, and began manufacturing vacuum bottles in 1948. We’ve been designing vacuum insulated products since then!

Vacuum insulation is a specific type of insulation that uses a man-made vacuum between two panels of materials, such as glass or stainless steel, so that the temperature of the fluids or gases on either side of the panels are isolated and don’t affect each other. The concept of a vacuum insulated flask was originally developed in the West in 1892 by James Dewar, a scientist who was interested in cryogenics and in developing supercooled substances like liquid hydrogen. Dewar needed a way to keep the liquid hydrogen cool, so that it wouldn’t evaporate, and came up with a vacuum insulated flask made of two walls of glass. Vacuum insulated glass containers were at the heart of Zojirushi’s technology, until 1981, when we created our TUFFBOY line and patented the process to make vacuum insulated stainless steel containers.

Vacuum insulation has many benefits, which we’ve incorporated into our bottles, mugs, food jars, and lunch jars since the first vacuum bottle. The first benefit is the superior insulation. Vacuum insulation prevents heat loss through conduction. Since the air which is a conductor  – is removed between the inner and outer layers of stainless steel, heat isn’t transferred. In fact, a gap as small as 1 mm for the air can insulate the food or drink inside your container!

If you remember from your school days, there are 2 other ways heat can transfer: radiation and convection. In a Zojirushi bottle, heat transfer is also prevented by insulating against radiant heat transfer. A thin sheet of aluminum or copper is wrapped around the outer surface of the inner layer to help reflect radiant heat.

And finally, heat transfer through convection is blocked by tightly sealing the lids on each of the products. For bottles, mugs, and food jars, the lid itself is equipped with a gasket to seal it onto the container, whereas lunch jars use a foam-insulated inner lid. Each of these three ways keeps food and beverages hot or cold for hours.

Along with managing heat transfer, using vacuum insulation makes all of our products lighter. Many thermal vessels use polystyrene foam or the addition of other materials to insulate, adding weight and bulk. Our vacuum insulation makes our products lighter and more compact.

Our superior vacuum insulation makes it easy to choose your favorite bottle, mug, food jar, or lunch jar. Pick between a non-stick coated or SlickSteel® interior. Choose the right size and capacity. And select your favorite color. Check out our full line up in the Products section, and be sure to comment with any questions you might have.

Design Explained – Mesh Safety Nets in Our Water Boilers

When designing our products, we choose our materials very carefully. We also consider how these materials are put together, with an eye towards functionality, practicality, ease of use, and maintenance. We’ve designed a mesh Safety Net into our water boilers, and this small component protects the dispensing mechanism in a smart way.

The Safety Net is a small, basket-shaped piece of metal mesh, fixed to the bottom of the inner containers of our water boilers upside-down. It prevents pieces of limescale or other debris from entering the dispensing mechanism, which pumps water so it can be dispensed. Limescale, which is generally comprised of calcium and other minerals naturally found in water, can build up inside the water boiler through normal use. Over time, limescale flakes off into small pieces that can get into the dispensing mechanism of the water boiler, preventing the machine from working properly. The machine makes a “grinding” sound when water is dispensed and eventually breaks. The mesh Safety Net acts as a filter that blocks rogue flakes of limescale from entering the water boilers’ dispensing mechanisms, and as a result, protects it.

Aside from making sure the filter is always in place when in use, we recommend treating your water boiler with our Citric Acid Cleaner once every three months. Doing so will remove limescale even before they flake off. Simply dissolve one packet of the Citric Acid Cleaner in a cup of warm water. Pour the mixture into your empty water boiler and fill the inner container with water. Close the lid and turn the machine onto the cleaning cycle, as per the instruction manual. Once the cycle finishes – usually about an hour later – unplug the machine and empty out the water. The final step is to rinse and dispense resulting in your water boiler becoming just like new! Check out our instructional video and if you ever lose your Safety Net, remember that a replacement can always be purchased from our Parts & Accessories store!

Stay tuned for next month’s Design Explained, where we talk about more smart and innovative features built into our products!