The summer in Yangjia Zhuangzi is really hot.

Hot springs make Zhuangzi a little warmer in winter, but in summer, the opposite is true.

Especially when the sun is scorching, the hot springs in the backyard are always steaming up with mist, and if there is no wind, the whole backyard is like a big steamer.

The men said that after getting off work in the afternoon, they stripped off their clothes and swam back and forth in the vortex river, and they felt comfortable all over.

But the women were not so lucky, although Yang Huairen had already shared the hot spring water with the villagers, and built a bathhouse outside the wall of the backyard to bring the hot spring water over, which was both convenient and practical.

At first, the women in Zhuangzi liked it very much, but later the population in Zhuangzi increased, and the original bathhouse became crowded, and they had to sweat more when they lined up outside to take a bath on a hot day.

It is not difficult to understand that the current population size of the Yang family Zhuangzi is more than double the number when Yang Huairen first came.

In the past two years, Yang Huairen brought a lot of people, as well as those government soldiers and their families, the children of the Zhuangzi who married wives and had children or found sons-in-law, plus the children they gave birth to, so that the population in the Zhuangzi expanded rapidly.

I have to say that Chinese people like to have children, and every man is born with a psychological pressure to pass on the lineage, especially after life is rich, he wants to have more children, and the imperial court is also encouraged.

There was no way, the bathhouse could only continue to expand, and in order to meet the needs of the future, Yang Huairen directly instructed the craftsmen to directly expand the original bathhouse by four times.

Yang Huairen has always been very afraid of heat, but he doesn't dare to ask the sky for rain. The vortex river does not look like a big river, but in a year with abundant rain, it is also necessary to lose its temper, and most of the grain fields in Yangjiazhuang are river flats, which are easy to suffer from flooding.

Although the farmers no longer rely on those fields to watch the sky for food, in their hearts, the harvest seems to be the most important thing.

But even if an adult like Yang Huairen can bear it, the children and the big-bellied women can't bear it, these days, the big officials are always crying irritably, and the little fish who is usually very well-behaved is always sad, which makes Yang Huairen feel distressed when he looks at it.

Tie Xiangyu and Lan Ruoxin opened all the doors and windows of their rooms, but they still felt that it was a torment to stay in the house, and they wiped a layer of sweat with a hand towel soaked in cold water, and another layer came out in a blink of an eye.

The maids and mothers who took care of the two of them were very anxious, and copied the pu fan around them to fan the wind vigorously, but the wind that came out was still stuffy and unbearable, and Tie Xiangyu and Lan Ruoxin did not feel cool.

When the two pot-bellied women wiped their faces until they turned red, Yang Huairen couldn't bear it anymore.

It's useless to curse God, and Yang Huairen can't learn from Houyi to shoot down the scorching sun one by one, so he has to find another way to make his family cooler.

It is certainly unrealistic to make air conditioners in this era, but the fan, Yang Huairen thinks that it can be a try, although there is no electricity, but through other ways, it seems that it is not impossible to make the fan turn.

All Yang Huairen could think of was to use the flow of water to learn the way of the waterwheel used for irrigation and let the fan spin.

The first is to build a water tower outside the house, not too big, higher than the house you live in, and use the air pressure and the pressure pump invented by Mr. Lian's disciples to fill the water tower with water, or you can also use natural rainwater to replenish the water storage of the water tower in the future.

Then use the potential energy left by the water from the water tower to promote the waterwheel to rotate, and the waterwheel outside the house is connected to the large and small gears, and finally connected to the ceiling fan in the house, as long as the design is reasonable to ensure the efficiency of energy utilization, then as long as the waterwheel outside rotates slowly, the fan in the house can rotate quickly.

It's just that the ceiling fan is dry, and the air coming out of the fan is still hot, but it doesn't matter, such a complex fan system has been built, and the problem of hot air is not difficult to solve.

A copper basin can be hung under the main shaft of the ceiling fan, and ice cubes can be placed in the copper basin, so that the wind from the fan becomes cool.

In this way, the outside water surrounds the house with an open channel, which slightly reduces the temperature of the whole room, and the whole room quickly becomes comfortable with a fan that can fan the cool breeze inside the house.

The first to install this fan system was naturally the room of the two pot-bellied women, and then the room of Yang Mu and Yun'er Lian'er, because the craftsmen worked carefully and quickly, and the whole process only took five days.

Of course, the cost of this water fan system is also quite high, regardless of the cost of the water tower outside the house, but those large and small gears and transmission parts are worth a lot of money.

But in order for the family to be comfortable in such a hot day, money is certainly not an issue.

The experimental fan system has achieved experimental success, Yang Huairen felt that it should be promoted, and the gentlemen's large office in the college should naturally be there, in order to exercise the students' spirit of hardship and hard work, the dormitory should be forgotten, but there should still be a large classroom.

In Zhuangzi, Yang Huairen also ordered a set for his brothers, which is obviously unrealistic to popularize in the whole Zhuangzi, but if the design is more mature in the future and the cost is reduced, it is not impossible in the future.

As a big profiteer, Yang Huairen naturally did not forget to use this new idea to make money, and Zhao Xu, Zhao Ji and Jiawangfu naturally wanted to send a set each, so that these royal people could do publicity for free.

When those princes and ministers and the wealthy people in the city discovered the benefits of this set of water-powered fans, they would naturally come to Yang Huairen to order at a high price, and Yang Huairen would naturally not set the price low.

In line with the basic principle that rich people's money is not earned in vain, and if it is earned, it is also earned in vain, Yang Huairen feels that the price of a fan system is still reasonable, and the cost is close to 100 yuan.

Yang Huairen originally thought of a relatively simple power source, such as designing a power source similar to a bicycle, and providing the energy for the fan to rotate through manual means.

But later, when he considered that if he sold it to those rich people, it would become a means for them to bring disaster to the servants in the family, Yang Huairen dispelled this idea, thinking that they were not short of money anyway, so they would build a water tower for them, and at the same time increase the business volume of Renxin Construction Bank, why not?

So this summer, although the imperial court snubbed Yang Huairen, Yang Huairen became popular with his own life wisdom, selling fans and ice drinks, not only making a lot of money, but also allowing the people in the city to spend this hot summer more comfortably.

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