I found the following: "Car air conditioners are about 30 years more advanced than home air conditioners."

I found the following: "Car air conditioners are about 30 years more advanced than home air conditioners."
First, I would like to announce again that I will be giving a talk in Himeji this weekend. If you would like to attend, please make a reservation!
http://www.matsuosekkei.com/kengakukai.html
It's a fairly old book, but it's about a car critic I love named Reiichiro Fukuno.
He has a book called "This is how cars are made." It was published in 2001, so it's already 13 years old.
The book is different from other car critics in that he actually visited most of the car parts factories.
I am currently studying the mechanisms behind this and digging deeper enough that I can understand the logic behind it to a certain extent.
While there are many car critics who make careless comments, he is one of the few who make bold comments.
I think that's the way to go.
As I read his book carefully,
I found a post about a tour of an air conditioner factory, and a description of what it was like when they visited Denso.
The mechanism of air conditioners can be a little difficult even for people who understand heat, but the explanation is very easy to understand.
It was probably the most easy to understand explanation I've ever seen.
I would like to write about some of the parts that I found particularly interesting.
・Car air conditioners are much more powerful than home air conditioners. For example, if we compare cooling capacity, home air conditioners generally use 2.2kW (this is a bit of a mistake, it's actually 10kW) for a XNUMX tatami room, and XNUMXkW (XNUMXkW) for a XNUMX tatami room, but in the case of a car, it's XNUMXkW for the XNUMX tatami mat floor space inside the car. (XNUMXkW cooling capacity is equivalent to a XNUMX tatami room) That's XNUMX times the power in simple terms. Unlike a house, the body of a car is not insulated, so the inside of the car quickly becomes XNUMX degrees Celsius in hot weather.
℃ 60 ℃. To cool it down in a few minutes, it is completely useless unless it is a large capacity one.
.
- Car air conditioners should be only one-third or one-quarter the size and weight of home air conditioners.
・"What is the technical secret behind car air conditioners being so compact yet so much more powerful than home air conditioners?"
"Well, it's the efficiency of each component, so to speak. Evaporators, condensers, compressors, over the last 20 years.
Air conditioners are rapidly progressing, becoming smaller, lighter and more efficient.
In other words, it's at the level of the 1970s." (This book was written in 2001, so it's 30 years behind the times.)
・"Recently, home air conditioners have finally come out with electric heaters installed downstream of the evaporator that warm the cool air before blowing it out in 'dehumidification mode'" (reheat dehumidification, which is what I always do, because 'dry operation consumes more energy than cooling operation') "Oh, I see, they advertise it vigorously, saying that it can dehumidify so that it doesn't get cold at night..." "But cars have been doing that for a long time."
That's about it. The actual book has plenty of photos of parts and factories, and the explanations are really detailed. It's worth reading just for the page on air conditioners.
Japan is far behind Germany in terms of home insulation and energy-saving technology in general, but when it comes to car air conditioners, it seems that Denso products are used by such prestigious manufacturers as Opel, BMW, Audi, Porsche, and VW. This shows that Japan's technological capabilities are number one in the world when it comes to equipment.
It is said that the average number of parts in a car is 30,000. Even if one car costs 3 million yen, the average unit price of each part is
The price is 100 yen. Thanks to the mass production effect, ultra-high performance parts are used at ultra-low cost.
It seems that cars are too cheap for the quality of their construction.
You could say it's a completely opposite industry.
That's why people in the automotive industry are shocked when they visit the factories of major housing manufacturers by their low productivity.