Chapter 1343

You think I don't understand anything. I come from later generations. Of course, I know the professional term in the field of air conditioning. In later generations, air conditioning is almost a necessary household product. Now, the Han country has just begun to develop. When it is hot in summer, sit in the shade of a tree, and then pick up a fan and shake it hard. It's quiet and cool.

Not only the air conditioner, but also the refrigerator. In the water well, hang the watermelon down. After a few hours, lift it up and cut it. It's called a fire.

Therefore, no one cares about the air conditioner. What are you afraid of when it's hot? Can it be called summer if it's not hot? It's an old saying to practice three volts in summer.

However, many places still need air conditioning. For example, in some large computer rooms, the computers are constantly running, and overheating will crash. Therefore, refrigeration is necessary. For example, tanks exported to desert countries also need air conditioning, otherwise they will be hot in summer.

In terms of advanced technology in the field of air conditioning, Lingsan heavy industry is quite powerful. In the history of parallel time and space, Lingsan heavy industry first appeared around the ordinary people in the Han Dynasty as a benchmark in the air conditioning industry.

The technology of the island country is cattle.

Now, for Qin Guan, to develop the country, he must have all walks of life. If he can introduce advanced air-conditioning technology into China, it is also good. However, if the other party is so arrogant and thinks that their own technology is the most advanced, Qin Guan is not happy, especially in front of these people.

Our Han technology is the best. We should instill such a view into the world.

Hearing what Qin Guan said, the experts of the air conditioning plant were stunned. They didn't expect that Qin Guan would ask such a question. Is Qin Guan really omniscient and omnipotent?

Qin Guan looked at the crowd with a smile on his face.

Nowadays, air conditioners are fixed frequency, which can also be called fixed speed. In short, the refrigeration of air conditioners is a certain power. If you want to turn it on, you can turn it on at once to provide refrigeration capacity, or you can turn it off.

For example, the temperature in the room should be kept to 18 degrees, and the external temperature is 30 degrees. Then close the window and the air conditioner will start cooling. Keep cooling down until it reaches 18 degrees, and the air conditioner will stop working.

After the air conditioner stops, the temperature in the room will continue to rise and rise. When it rises to 20 degrees, the air conditioner will continue to start, cool to 18 degrees and shut down. This cycle goes back and forth. Therefore, when using this air conditioner, it will start and shut down continuously.

What's the harm? First of all, people feel uncomfortable. They keep closing and opening. The temperature in the room is floating, not a specific value. It's cold and hot.

Secondly, when the air conditioner starts, it will have an impact on the power grid. If you put the computer plug directly on the same socket as the air conditioner plug, you can find that the computer will restart immediately when the air conditioner starts, because the power grid fluctuates too much.

Therefore, in later generations, variable frequency air conditioning gradually rose.

Frequency conversion first explains who is changing, so we should know why the previous air conditioner can not change. This change is the motor, which drives the compressor to provide pipeline pressure, so that the refrigerant can take away heat through the cycle process of evaporation and liquefaction.

The power of the motor is certain, that is, constant frequency. If the motor can change the speed and power, this is frequency conversion. In contrast, of course, frequency conversion has more advantages. It can adjust the load by changing the power supply frequency, reduce power consumption, reduce loss and prolong the service life of the equipment. At the same time, the user is more comfortable.

This technology is the technology that these people are studying. Of course, they have not made a technological breakthrough. It was 1988 that the real variable frequency air conditioner appeared in the island market.

Now, when Qin Guan asked, Koizumi couldn't help saying, "President Qin, I didn't expect you to know so much. Yes, our air conditioner doesn't have frequency conversion capability. However, we are conducting research in this field and introducing the frequency converter in the industrial field into our air conditioning control system to make it have frequency conversion capability."

Koizumi would never say that if he did not have this R & D capability, but he did not succeed in R & D. the principle of this frequency conversion is also very simple. It changes the power frequency through the frequency converter, so as to change the speed of the compressor. Specifically, it is a two-time conversion. First, the AC to DC conversion is carried out through the frequency converter, and then the DC to AC conversion is carried out through the frequency converter. This conversion changes the constant AC into the AC with variable frequency, so as to control the speed of the AC motor. Qin Guan nodded: "it's good that you can adopt such technology. It's within your technical scope."

Listening to Qin Guan's voice, it was like standing on the top of the mountain overlooking the people. The technicians of the island country on one side were not satisfied.

"Mr. Qin, listen to what you say, our technology is still unsatisfactory?" Koizumi asked with a smile. As a senior manager, we must control our emotions.

"Of course, this technology is not the most advanced." Qin Guan said, "your technology can be called AC frequency, which is also careless. More advanced than it is DC frequency conversion."

Hearing Qin Guan's words, a man immediately said, "I've never heard of DC and frequency?"

Alternating current and current change. The number of changes in a second is the frequency, but direct current and current are constant. Where is the frequency and frequency conversion?

This is just the words of a layman.

Qin Guan said with a smile: "yes, I have a misunderstanding about this abbreviation. DC frequency conversion is separate. DC, it means using DC motor and frequency conversion. It means that the speed of the motor is adjustable, not that DC has frequency."

As a former science student, this most basic problem is difficult for Qin Guan. The technology of air conditioning has developed from fixed frequency to frequency conversion. In the dispute over the route of frequency conversion, DC frequency conversion has defeated AC frequency conversion. With the continuous progress of technology, Qin Guan knows the route clearly.

Although they are all frequency conversion, the energy consumption ratio is also different, which depends on whose technology is more advanced.

Qin Guan said that when he saw a technician next to him holding a marker, he reached for it and began to draw a block diagram on the other party's clean and tidy ground.

"If you want to change the control circuit, you need to change the AC into DC first. This is the first step of inverter. However, the two frequency conversion technologies are different next." Qin Guan said, drawing a beautiful box, which is exactly the width of a floor tile. This is a marker pen. As long as it is written, it can't be erased.