What do you mean by matching each other?

What is the meaning of phase in three-phase and two-phase motors?

A three-phase motor is called a three-phase motor, and the stator coil is wound into three pairs of poles with a phase difference of 120 degrees, so as to adapt to the use of a three-phase AC power supply with an electrical angle difference of 120 degrees above 380 V. A two-phase motor must use a two-phase power supply consisting of one of the three-phase power supplies and a neutral line, that is, a 220V power supply. The stator coil is composed of two groups of main coils corresponding to each other as working coils and a starting coil with a difference of 90 degrees, and of course, it also includes an excitation motor, so it is called a two-phase motor.

What does sexual orientation mean?

Earthly branches (harmony): Harmony means assimilation, but it is called harmony with earthly branches. There are two kinds of combinations of earthly branches: the first is the combination of twos and twos, and the plan is: ugly children (rats and cows) combine soil, yin and sea (tigers and pigs) combine wood, Mao and Xu (rabbits and dogs) combine fire, Chen and You (dragons and chickens) combine alloy, and Shen (snakes and monkeys) combine water. The second triad branch: * * four groups: Shenzichen (monkey, mouse and dragon) water bureau, Haimaowei (pig, rabbit and sheep) wood bureau, Yinwuxu (tiger, horse and dog) fire bureau and Youyouchou (snake, chicken and cow) alloy bureau. Because everything belongs to the earth, ugly things (dragons, dogs, cows and sheep) combine to form the earth.

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There are three boxes of apples, A, B and C, which are 56 kg, 52 kg and 50 kg respectively. Which basket is the heaviest

A+B+C =(56+52+50)÷2=79 kg

The mass of A is 79-50=29 kg.

The mass of B is 79-52 = 27kg.

The mass of c is 79-56 = 23kg.

So A is the heaviest, with a mass of 29 kilograms.

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I want to ask, what do you mean by one air conditioner and two air conditioners?

The number of air conditioners indicates the cooling capacity of air conditioners, that is, the cooling capacity. The cooling capacity of one air conditioner is about 2500W, which is suitable for a room of 12 square meters, and the cooling capacity of two air conditioners is about 5000W, which is suitable for a room of 25 square meters.

Room area and air conditioning model selection

In general, the cooling capacity per square meter of family bedroom is 1 15- 145W, and that of living room and dining room is 145- 175W. If the room is well insulated and sealed, and it is not sunny, a small value is desirable, otherwise a large value is desirable, and it should be appropriately increased when the floor is high. Generally, you can take the middle value, such as bedroom 130 and living room 160. For example:

bedroom

15m2:130 *15 =1950 (w), because there is no air conditioner with corresponding cooling capacity, type 22 is selected nearby;

20 square meters: 130*20=2600(W), choose type 26;

25m2: 130*25=3250(W), choose type 32;

28 square meters: 130*28=3640 (width), choose type 35.

living room

30 square meters: 160*30=4800 (width), type 50 is selected;

40 square meters: 160*40=6400 (width), and type 60 is selected;

45 square meters: 160*45=7200(W), type 72 is selected;

In addition, we should also consider room power supply. Generally, there is a difference between two-phase power supply and three-phase power supply for air conditioners over 50 types. If there is a three-phase power supply, try to choose a three-phase air conditioner, and each phase current is small, which is conducive to electricity safety.

Energy efficiency ratio

When buying air conditioners, we should not only consider the cooling capacity (number of air conditioners), but also consider the energy efficiency ratio EER of air conditioners. It represents the cooling capacity per unit power of air conditioner. The higher the EER value, the more heat absorbed by evaporation in the air conditioner or the less electric energy consumed by the compressor, that is, the cooler effect can be obtained by using less electricity. This is the parameter we really need to consider.

EER= cooling capacity/cooling power consumption.

Example: 2 air conditioners with power of 1500 watts.

Then: eer = 2/1500 = 2 * 2500/1500 = 3.3.

EER= cooling capacity/cooling power consumption

From: Shanghai Xiaolintong Community Service

Why was the ancient emperor called the Ninth Five-Year Plan? What does this mean?

In ancient China, numbers were divided into positive numbers and negative numbers, odd numbers were positive and even numbers were negative. In Yang numbers, nine is the largest and five is in the middle, so "nine" and "five" symbolize the authority of the emperor and are called "the supreme of the ninth five-year plan". It has also been said that in ancient China, people regarded the Ninth Five-Year Plan as an auspicious number, just as westerners regarded seven as an auspicious number. Now people regard eight as an auspicious number, so it is a common idea to regard the Ninth Five-Year Plan as a noble person.

Nine is the biggest, five is the middle, and the "Ninth Five-Year Plan" refers to the biggest middle person among ten thousand people, of course, only the emperor.

What are gossip and time?

Gossip is also called classics. The eight basic figures in Zhouyi are marked with "one" and "-",and each hexagram consists of three hexagrams; Take "one" as yang and "-"as yin. Gan, Kun, Zhen, Xun, Kan, Li, Gen, Dui and Bagua. See the "Eight Diagrams Symbol" below for specific symbols. The sixty-four hexagrams in the Book of Changes are all composed of eight diagrams. Gossip originated from the divination of primitive religion. The author of Yi Zhuan thinks that gossip mainly symbolizes eight natural phenomena: heaven, earth, thunder, wind, water, fire and mountains and rivers, and each letter symbolizes many things. He also believes that the two hexagrams "Gan" and "Kun" occupy a particularly important position in the Eight Diagrams and are the source of all phenomena in nature and human society.

Analysis of gossip symbols

Gossip symbol:

Gan: Gan Sanlian Kun: Kun Liu breaks the earthquake: shakes the bowl: covers the bowl.

Separation: separation from the empty ridge: full exchange in the ridge: lack of exchange: separation from the bottom.

(A) the formula of gossip songs

Gansanlian, Duan, Genfu Bowl,

From the virtual, full of mountains, against the lack, lost.

Bagua algebra

Do one, two, three, four,

Xunwu, Liu Kan, Gendi and Kumba.

(3) Eight Diagrams Orientation

Dry: Northwest. C: North. Root: Northeast China. Earthquake: East.

Xun: Southeast. From: South. Kun: Southwest. Exchange: West.

(4) Gossip belongs to

Drying and exchange (gold); Earthquake, earthquake (wood); Kun and gen (earth); Leave (fire); Kans (water).

(5) Gossip begets resentment.

Dry, against (gold) gives birth to ridge (water), ridge (water) gives birth to earthquake, Xun (wood), earthquake, Xun (wood) gives birth to separation (fire), separation (fire) gives birth to Kun, Gen (earth), Kun, Gen (earth) gives birth to dry, exchange (.

Gan dui (gold) grams, Xun (wood) grams, Xun (wood) grams, Gen (soil) grams, Gen (soil) grams (water), Gen (water) grams.

Gossip has ups and downs.

Dry, autumn, winter; Earthquake, Wang Xun in spring, the decline in summer;

Kun, Wang Gen in the four seasons, declined in autumn; From midsummer, decline to four seasons;

Wang Can grows in winter and declines in spring. (Four seasons refer to the last month of each season)

(seven) the five elements correspond to gossip:

Gold-dry, dry for the sky, dry for ze.

Wooden earthquakes and Xun earthquakes are thunder, Xun is wind.

Tukun and Genkun are land, and Genkun is a mountain.

Water.-Kan Kan is water.

Fire separation is fire.

Coexistence of five elements: golden water, wood, fire and earth.

The five elements are harmonious: Jin Mu, earth, fire and water.

From 1 1 in the afternoon to 1 in the morning.

Rat rat jumped up at this time.

Ugly 65438+ 0 am to 3 am

Niu Niu ate grass at this time and prepared to plow the field.

Yin from 3: 00 to 5: 00 a.m.

Tiger tiger is the fiercest at this time.

5 a.m.-7 a.m.

Rabbit Moon, also known as Jade Rabbit, is still in the sky during this time.

From 7 am to 9 am.

According to legend, this is the time to "rain with dragons"

9: 00 a.m. to 1 1 p.m.

The snake is hiding in the grass at this time.

1 1 am to 1 pm.

At this time, the sun is the fiercest among the horses. According to legend, at this time, the yang will reach its limit and produce yin, while the horse is a yin beast.

Not 1 3 pm.

Sheep eat grass during this time.

Shen 3: 00 pm to 5: 00 pm

Monkeys like to crow at this time.

From 5 pm to 7 pm

Chickens begin to return to their nests at night.

7: 00 pm to 9: 00 pm

The dog began to watch the door.

9: 00 pm to 0: 00 pm

Pigs sleep at night ... >>

What is extroversion and introversion?

Externality comes from both internal and external cultivation, that is, paying attention to both internal knowledge and wisdom and external appearance temperament, and combining the two. Simply speaking, it is also external beauty and extraordinary temperament.

Introversion has two meanings: personality, deep thoughts and feelings are not exposed; (artistic style) subtle and intriguing.

Extrinsic introversion: a person with beautiful appearance, extraordinary temperament and deep feelings who is difficult to open his heart. (referred to as the flower of Gaoling)