Several scientific researchers stepped aside and looked at Li Qingming respectfully, waiting for his guidance.

Regarding the range hood, Li Qingming naturally has it at home. This is a must-have for Chinese restaurants and Chinese families. Without it, you're sitting in the house with smoke and you can't see anything.

And about this range hood, this initially, there was another rumor that was not a rumor. It is said that the range hood is not as good as the exhaust fan. This exhaust fan was originally used by every household.

In ancient China, there were naturally no exhaust fans, so every household had a chimney that could allow the smoke to be dispersed outside. Of course, this is also called cooking smoke. In ancient times, if you see a line of cooking smoke rising, it means that even if there is not enough food and clothing here, it is also worry-free. That's a good thing. Of course, in the West, you can't experience this kind of smoke-curling scene. Because everyone's cooking style is different, you can't see the cooking smoke.

In modern times, the former houses have been turned into apartment buildings, and naturally there are no more chimneys like this. But this family has to cook. Stir-frying will form cooking smoke. So, in the beginning, in that era when it was not wealthy, everyone was cooking outside the fire and inside the corridor.

At that time, apartment buildings were all corridors, not only for walking, but also for cooking for each family. However, due to the narrowness of the corridor, the smoke is billowing out, and once the fire is burned, the whole building seems to be on fire.

In addition, if you want to make a fire for cooking, you must have firewood or coal, so it is really easy to form a fire. But in those days, there was no way. With the progress of material civilization, everyone is slowly getting rich.

Of course, it is mainly the vigorous promotion of real estate developers, and this family lives in a modern commercial and residential building with two families in one corridor. In this case, it is naturally even more impossible to come out to cook on the fire again. Don't want to live in the whole building.

So, there are smart people who invented the small kitchen. The so-called small kitchen, that is, in the kitchen, has an extra protruding piece on the outside, and this protruding piece is the stove, on which are placed various electronic stoves.

Then, on either side, there are two exhaust fans. That is, the fan blades similar to the electric fan, when cooking, the exhaust fan is turned on to extract the smoke generated. So is the effect good?

As far as Li Qingming is concerned, this effect is really average. Most of it can be discharged, but a small half will still float into the house. But there is no way, the exhaust fan can only be like this. What's more, at this time, they all use gas or liquefied gas, so it is naturally impossible to go outside to cook with firewood.

Everyone can only endure it.

Later, with the unremitting efforts of real estate developers, they continued to launch a variety of more modern real estate, so the exhaust fan was too unsightly, and the small kitchen was also unsightly.

Therefore, someone has researched the range hood.

When this range hood first came out, it was slandered a lot. It is said that its effect is not as good as that of the exhaust fan. The exhaust fan has a strong wind, which can extract all the fumes, but the range hood is not, and after installation, there are still all kinds of fume stains at home.

At first, many people believed this statement. Coupled with the price of the range hood at that time, it was indeed far better than the exhaust fan. Therefore, everyone is like this, and they are all saying that the range hood is not good, and it is not as good as the exhaust fan.

Including Li Qingming's family, they used to think so. But when your room type is no longer suitable for installing an exhaust fan, then you can only choose a range hood. And once installed, it was found that the effect of this range hood is far better than that of the exhaust fan.

This exhaust fan itself can't take away all the fumes, even if a small kitchen is installed, the whole room is a puff of fumes, and when stir-frying, the kitchen door must be closed. At the same time, the whole kitchen, after a long time, is also a variety of oil stains, how difficult to wipe is, how difficult to wipe.

After installing the range hood, basically, the oil smoke can be extracted. And all the oil stains will only be in the range hood, not anywhere else, as long as it is cleaned regularly and simply, it can be disposed of.

Therefore, many rumors are driven by the interests behind them.

The so-called hustle and bustle of the world is all for profit, and the hustle and bustle of the world is for profit. What is not profitable, no one will do. Any rumors, rumors, or rumors are driven by profits.

The topic of this range hood, about this range hood, whether it is good or not, in fact, is very simple, there are two hard standards for range hoods: first, large air volume, can ensure that all oil fumes can be extracted;

Li Qingming stood in front of him, looked at it carefully, brought a pot, and then tried to make a mock stir-fry.

"Open!" Li Qingming said simply.

Again, the range hood turns on, humming for inhalation.

Li Qingming felt it, nodded, and signaled that it could be turned off.

"Mr. Li, is there anything that needs to be improved?" the crowd asked.

Li Qingming pondered for a moment.

"I'll start with the first point, which is that the air intake must be large to ensure that the fumes are pumped away. Otherwise, the smoke of Chinese cuisine is very scary, and the entire federation will not be able to stand it. Li Qingming said.

The crowd nodded and recorded it.

"So, increase the pumping volume and then make sure it's quiet. Be as quiet as possible. This ensures that the person stir-frying will not be disturbed by the noise. Although this is a small matter, it is crucial for everyone's stir-fry experience. In this regard, I can only put forward my opinion, how to solve it, is your problem!" Li Qingming said.

This is also a point that the range hood must pay attention to. Otherwise, no matter how large your air intake is, there is no oil smoke, but it is too noisy. This is definitely not going to work.

Everyone nodded. It's just a bit too annoying. People didn't pay attention to that. After all, if you think about it, that is, when you fry rice, it will open for a short while, so the impact should not be too big.

But now when Li Qingming said this, it was abrupt. If you're going to be too annoying, then you won't want to open it if you buy it. Because it's so noisy, there is a limit to how much people can tolerate noise. You're so noisy, no one can stand it.

But if you can't buy it, then if the reputation continues, naturally no one will buy it. Because it's useless to buy it. Not only that, but this also affects the popularity of Chinese cuisine as a whole. The scope of this is wide-ranging.

"Secondly, it is about the setting of the flue. At this point, you have to set the flue according to the type of apartment building in the current federation. Li Qingming said.

In Huaxia, all buildings have flue settings, so the kitchens are fixed. But the Federation did not, because without the emergence of Chinese cuisine, then naturally there would be no flue setting. There's no way around that.

Only Chinese cuisine will form a curling smoke.

"We see, thanks for the advice!" several researchers thanked gratefully.

Li Qingming paused, but didn't say much in the end.

"Do you have anything else to say? If so, just say it. They are all people who focus on scientific research, as long as it is related to design and development, you can say it clearly!" Qin Heluo saw that Li Qingming didn't seem to have finished speaking.

Li Qingming thought for a moment.

"That's not really critical. However, it is also directly related to the experience of every stir-fry person. Li Qingming pondered, "But I'm afraid it will be in cost, which will lead to an increase in cost!"

"Cost isn't something you're going to think about, and it's not something they're going to consider. This is what the marketing department needs to consider!" Qin Heluo said domineeringly, "All you have to do is to give the best advice and make the best product! As for the rest, that's what the marketing department needs to consider!"

Scientific research is scientific research! regardless of cost. As for whether the cost is too high and affects the market after the research comes out. That is, the marketing department will give suggestions after conducting research. Then the production department will weigh it, and finally come up with a new set of plans after consultation with various departments.

But before that, the Ministry of Scientific Research was only testing scientific research, just scientific research.

"What I'm trying to say is that the height of each stir-fry person is different, and the optimal distance for this air intake is fixed, about 50 centimeters. Li Qingming said this, but did not say it.

The rest of the people understood.

It's easy to understand. For example, a person with a height of 150 cm and a person with a height of 190 cm stir-fry vegetables, the height of the stove is naturally different for them. So, in this case, how to balance.

How to fix it?

"Do you have any suggestions?" Qin Heluo asked.

In fact, this problem also exists in Huaxia. It's just that most of the time, it's people who self-regulate. After all, the stove is fixed, the range hood is fixed, and the only thing that can change is that people find a way to adapt to it. Of course, in most cases, it's the median value used. That is, it is most suitable for people with a height of about 170 to cook on a fire. Therefore, the height of the cooktop is generally 70 cm high.

It's short, and it's more uncomfortable. It's high, and it's uncomfortable. But it can't be helped, you have to take into account the majority of people.

The only change is that the range hoods, which were originally straight-through, have been changed to side-draft, because this does not touch the heads of those tall people. However, this feeling is still not very good.

The taller you are, the more uncomfortable it is. But how to solve it, Li Qingming doesn't know.

After all, no one is going to think about solving it.

It's always the same, and the stove is 70 centimeters high. The optimal intake distance for a range hood is 50 cm, which is a fixed formula. So can the federation solve it? Of course, it's not impossible, but once it is adjusted, then the intermediate cost will be too high.

Therefore, Li Qingming was also helpless. I didn't say anything about it just now.

"This problem is really difficult to solve! But it actually has nothing to do with us!" the scientific researcher thought for a while and said, "Because the height of the stove is determined by every family in the Federation, not us!"