In 1984, GoldStar, the predecessor of LG Electronics, and Daewoo introduced early dedicated kimchi refrigerators. They did not catch on. It took another eleven years for a version of the same basic idea to catch on so completely that a Korean government cultural publication reported in 2021 that more than 98% of Korean homes had one.

What makes that story worth telling is not the failure. It’s the gap. A product can be technically useful and commercially dead because the surrounding habits, homes and economics are not yet ready for it. So what changed between the early models and the phenomenon?

Why the 1984 models struggled

Traditionally, Koreans packed kimchi into earthenware crocks, often called onggi or kimchittok, and buried them in the ground during winter. The surrounding earth kept the temperature low and relatively stable, slowing fermentation and helping preserve the kimchi.

The first dedicated refrigerators were already aimed at the growing problem of storing kimchi in apartments and other urban homes. But they asked households to find room and money for a second appliance devoted largely to something still associated with crocks, insulated boxes and established storage habits. The academic history says separate kimchi refrigerators were unpopular because of their space and cost, while later 1988 designs also failed to displace traditional methods.

The 1984 appliances were not simply products for a problem nobody had. They were early answers to a real urban problem, but the market was not yet willing to accept the cost, size and change in habit.

What changed by 1995

As Korea’s cities grew, apartment living became much more common and detached houses declined. In the KOREA webzine, a cultural publication from the Korean government, the writer Yu Pureum put the shift plainly: “The proliferation of apartments and subsequent decline in detached houses, particularly after the Seoul Olympics of 1988, meant burying kimchi was no longer so easy.”

I’d read that as one push among several, not a single cause, but the direction is clear. Once traditional storage became less practical, families relied more heavily on ordinary refrigerators and found that fluctuating temperatures and circulating air were not ideal for a wet, fermenting food. The same webzine article says kimchi kept in a regular fridge could go bad after about a month.

Into that gap came Mando Machinery, later Winia Mando, with an appliance called Dimchae, launched in 1995. It sold slowly at first. According to The Korea Times, Dimchae sold around 5,000 units in its first year, then sales rose to 530,000 in 1999. Similar idea, wildly different outcome. The market had finally arrived to meet it.

The problem an ordinary fridge cannot solve as well

An ordinary refrigerator commonly cools by circulating cold air. That creates temperature variation and removes moisture from food. This works well for many foods, but it is less suitable for wet, fermenting kimchi, whose acidity and taste continue to change with temperature.

Winia Mando’s approach was to copy the ground rather than the ordinary fridge. A product planning manager at the company, Sung Kyoweon, said its engineers measured underground temperatures several hundred times and found that they remained within about one degree Celsius on average. That is the company’s account of what its engineers were trying to reproduce, rather than an independent measurement, but it explains the design.

Sung explained that the company adopted direct cooling instead of the regular refrigerator’s wind-based method. Rather than merely chilling and circulating air, cooling pipes around the storage compartment cooled it directly, helping maintain a steadier temperature and higher humidity. The whole point was to make an appliance behave more like a crock surrounded by cold earth.

From niche second fridge to national default

The payoff was fast. From roughly 11% of households in 2000, ownership climbed to 81.3% by 2011. By 2021, the government put the figure above 98%. 

What strikes me about the whole arc is how little the winning appliance had to invent. Dimchae did not create a desire for well-kept kimchi. That desire was centuries old, and it already had a trusted solution: the buried crock. What Mando did was study that old solution and rebuild it as a plug-in box for people whose homes no longer accommodated it easily.

The early models struggled because a separate kimchi refrigerator still felt too costly, bulky and unfamiliar. The 1995 model succeeded because urban living had made the old storage method harder, while the design offered tighter control over the temperature and humidity of a food people already cared about.

Get the physics of an existing habit right, at the moment that habit needs a new home, and you do not have to invent the desire.