Heavy truck cooling and heat dissipation know how much coolant is the most critical.

The function of automobile cooling system is to dissipate the heat in time to make the engine work at the most suitable temperature. The ideal automobile cooling system should not only meet the needs of engine cooling, but also reduce heat loss and energy consumption, so that the engine can have better energy-saving effect on the basis of ensuring good power performance.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

First, the working principle of the cooling system

The cooling system plays a very important role in the automobile. The engine cooling system generally adopts water cooling. The typical cooling system consists of radiator, radiator hose, thermostat, water pump, cooling fan and fan belt.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

It relies on the cooling water pump, flows through the oil cooler and crankcase cooling water jacket, enters the cylinder head, and takes away the excess heat of the engine.

Great cycle:When the engine works under normal thermal state, that is, the water temperature is higher than 80℃, the cooling water should all flow through the radiator to form a large cycle. The main valve of the thermostat is fully opened, while the control valve completely closes the bypass hole.

Small cycle:When the cooling water temperature is lower than 70℃, the steam pressure in the expansion tank is very small, and the cooling water does not flow through the radiator, but only circulates between the water jacket and the water pump.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Second, the role of coolant

Coolant plays a very important role in the normal operation of the engine. Too high or too low coolant temperature will have an adverse impact on the engine. If the engine coolant temperature is too high and the viscosity of lubricating oil decreases, the friction loss of engine parts will increase.

If the engine coolant temperature is too low, the viscosity of lubricating oil will increase and the fluidity will deteriorate, which is also not conducive to lubrication, thus reducing the power output of the engine and affecting the mechanical efficiency of the engine.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Coolant is the heat transfer medium in the cooling system, which has the functions of cooling, anti-corrosion, anti-scaling and anti-freezing. It is composed of water, antifreeze and various additives.

1. Water is an important part of cooling liquid, which has large specific heat capacity and fast heat conduction, and the heat absorbed by water is easy to dissipate.

2. Antifreeze is used to reduce the freezing point of coolant. Because of the high freezing point of water, it is easy to freeze when used in cold and low temperature weather. Adding a certain amount of antifreeze can reduce its freezing point and meet the harsh working conditions.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

3. Other additives

Additives generally do not exceed 5%, mainly corrosion inhibitors, buffers, scale inhibitors, defoamers and colorants.

(1) Corrosion inhibitor:It can effectively prevent the corrosion of metal substances in the cooling system, because the cooling pipeline is mainly composed of metal parts, and it is easy to corrode under the conditions of high pressure, thermal load and corrosive medium, which will damage the cooling system.

(2) Scale inhibitor:It can effectively remove the scale and improve the heat dissipation capacity. During the use of cooling liquid, scale often forms on the inner surface of the cooling system, and the thermal conductivity of scale is lower than that of metal, which seriously affects the normal heat dissipation.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

(3) Defoamer:It can effectively prevent foaming. When the coolant is forced to circulate under the high speed of the water pump, it usually produces foam. A large amount of foam not only affects the heat transfer efficiency, but also aggravates the cavitation corrosion of the water pump.

(4) Colorant:In the process of using coolant, it is generally required to add certain coloring agent to make the coolant have eye-catching color. In this way, when the cooling system fails, the location of leakage can be easily judged by observing the external pipeline of the cooling system.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Third, the classification of coolant

Engine coolant is divided into ethylene glycol coolant and propylene glycol coolant according to antifreeze:

1. The specific heat capacity, thermal conductivity, viscosity and boiling point of ethylene glycol are all important parameters that affect the heat transfer performance of ethylene glycol aqueous solution. The specific heat capacity and thermal conductivity of ethylene glycol aqueous solution decrease with the increase of concentration, while the viscosity increases with the increase of concentration.

2. The performance of propylene glycol in reducing freezing point is basically the same as that of ethylene glycol, and it is less toxic and more expensive than ethylene glycol.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Fourth, the maintenance of the cooling system

1. Selection of coolant

(1) In order to prevent the cooling system from freezing, appropriate antifreeze can be selected. Generally, the freezing point of antifreeze should be 5℃ lower than the lowest temperature in the use area.

(2) Different types of antifreeze cannot be mixed.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

2. Replacement cycle and dosage

(1) Replacement cycle:Generally, the coolant needs to be replaced once every 2-3 years, specifically according to the instruction manual.

(2) Addition dosage:The antifreeze should be added between the marks F(MAX) and L(MIN) of the expansion tank in the engine cooling state.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

3. Daily maintenance:

(1) Pay more attention to daily observation. Once the coolant is insufficient, the surface of the water pipe shows signs of whitening or there is white emulsion in it, the coolant leaks.

(2) Check the connection position and state of all cooling system hoses and heater hoses, and replace them in time if they swell or deteriorate.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Summary: The cooling system plays a very important role in the car. In daily use, Ying Qin should take care of it to prevent problems before they happen and keep the car in a good state. Always check whether the engine coolant is sufficient, and add or replace the appropriate coolant in time when necessary.

Guilin Fenglanda price reduction news, special price 92,800! limited in number

[car home Guilin Preferential Promotion Channel] At present, we are enjoying preferential treatment in Guilin, with the highest preferential rate reaching 33,000 yuan and the lowest starting price being only 92,800 yuan. If you want to buy a friend of Fenglanda, you may wish to click "Check the car price" in the quotation form to get a higher discount.

桂林锋兰达降价消息，特价9.28万！数量有限

Feng Landa’s design is fashionable and dynamic, and the front face adopts family-style design language, with large air intake grille and sharp headlight group, showing a strong visual impact. The body lines are smooth, and the overall style is simple without losing the sense of strength, which shows the sporty atmosphere of Feng Landa.

桂林锋兰达降价消息，特价9.28万！数量有限

Flanders have a compact and dynamic body with a length, width and height of 4485mm, 1825mm and 1620mm respectively and a wheelbase of 2,640 mm.. The side lines of the car body are smooth, showing a sporty atmosphere. With 17-inch rims and 215/60 R17 tires, the visual effect of the whole car is even better. Flananda’s rim style is simple and fashionable, which enhances the sense of movement and fashion of the whole vehicle.

桂林锋兰达降价消息，特价9.28万！数量有限

Feng Landa’s interior design is simple and modern, with practical layout and high-quality materials. The central control area is equipped with a 10.25-inch central control screen, which provides clear multimedia and navigation display, improving the convenience of the driver’s operation. The steering wheel is made of plastic and equipped with manual up-and-down and forward-and-backward adjustment functions, which can be adjusted according to the driver’s needs. In terms of seats, Flanders is equipped with fabric seats, which provides good comfort and support. The main driver’s seat has the functions of fore-and-aft adjustment, backrest adjustment and height adjustment, while the co-pilot seat has the functions of fore-and-aft adjustment and backrest adjustment. The second row of seats supports backrest adjustment and proportional reclining, which is convenient for passengers to adjust their riding posture and load luggage. In addition, the car is equipped with a number of USB/Type-C interfaces, including one Type-C interface in the front row and two USB interfaces in the back row, which facilitates the charging of passengers’ electronic equipment.

桂林锋兰达降价消息，特价9.28万！数量有限

Fenglanda is equipped with a 2.0L naturally aspirated engine with a maximum power of 126kW and a maximum torque of 205N·m, which is full of power. With CVT continuously variable transmission (simulating 10 gears), it can bring a smooth and comfortable driving experience.

The owner of car home spoke highly of the appearance of Fenglanda, and he mentioned, "I like this pearl white color very much in appearance. The design of the whole car is also very good. The front part of the car adopts a brand-new optimized design, and the large-area lattice blackened middle net and full LED headlight group leave a deep impression on people. The lines of the front of the car are very tough, showing a design concept of low center of gravity, showing a very tough and tough image. The design of the side and rear of the car also emphasizes the sense of strength. The wide chrome trim and the full taillight shape increase the visual effect. "

Great Wall Euler released the right to buy a car in October： the good cat starts at 95,800 yuan, and the lightning cat has a maximum discount of 60,000 yuan.

On October 5 th, Great Wall Motor’s Euler brand released its car purchase rights in October on the 4 th, including 2024 Euler Good Cat/GT Mulan Edition, Euler Ballet Cat, Euler Lightning Cat and other models.

The specific benefits of IT House are summarized as follows:

According to the previous report of IT House, the sales volume of 108,398 vehicles of Great Wall Motor in September dropped by 10.88% year-on-year, including 44,105 overseas vehicles and 30,129 new energy vehicles, with a total of 211,492 vehicles from January to September. Among them, the sales volume of Euler brand in the month was 5486, compared with 10021 in the same period last year.It fell by 45.25% year-on-year.

GAC Trumpchi E9 super fast charging version listed, priced 32.28-39 2,800

On November 12, the GAC Super Fast Charge Edition was officially launched. The new car is positioned as a medium and large MPV, equipped with a new generation of magazine batteries with a capacity of 25.5kWh. The official said that it can charge the power to 80% in 8 minutes, and the pure electric cruising range of CLTC working conditions is 136km. The new car launched a total of 3 models, priced at 32.28-39 2,800 yuan. At the same time, from now until November 30, the purchase of the car can enjoy six gifts.




The appearance of the GAC Trumpchi E9 super fast charging version adopts the same design style as the current model. The front face has a "Lion Dance" shape, and it is matched with the Zhentian Wing 2.0 front grille to create a magnificent visual effect. The "7" shape headlight group is slender, and the internal light strip is quite complicated, which has a strong sense of refinement. In terms of body size, the length, width and height are 5212mm*1893mm*1823mm, and the wheelbase is 3070mm.

The side profile of the car has a traditional MPV styling style. The creased waist line is matched with a dense spoke rim, which greatly enhances the sense of design and effectively avoids the stupid feeling caused by the huge body size. The rear design emphasizes stability, and the tail light design adopts a horizontal through + vertical cut criss-cross design, which has excellent visual effect after lighting.


The interior design is quite advanced, and the overall layout adopts the "T" shaped floating shape, which strengthens the sense of hierarchy. In terms of configuration, the new car will provide 12.3-inch combined full LCD meters, 14.6-inch multimedia central control screen, 12.3-inch co-pilot entertainment screen, 7.1.4 surround sound system, integrated smart ceiling screen, etc., to meet the diverse needs of consumers today.

In terms of power system, the GAC Trumpchi E9 Super Fast Charge Edition will be equipped with a plug-in hybrid system composed of a Trumpchi hot topic efficiency 2.0TM engine, with a maximum horsepower of 190Ps, a peak torque of 330 · m; 134kW, and a total torque of 300N · m. The matching transmission system is a hybrid dedicated 2-speed DHT gearbox, a new generation of magazine batteries with a battery pack of 25.5kWh, and a CLTC pure electric range of 136km. It only takes 8 minutes to charge from 30% to 80% using DC fast charging.

Summarize:The Trumpchi E9 Super Fast Charge Edition is equipped with a new generation of magazine batteries, which makes it use DC fast charging. It only takes 8 minutes to charge from 30% to 80%, solving the problem of charging time efficiency that many users care about. At the same time, the new car has also been upgraded in terms of intelligent and comfortable configuration. Whether it is home or commercial, this car is a good choice.

Foshan qichen V DD-i super hybrid price reduction information, with a discount of 26,000! There are plenty of cars.

[car home Foshan Preferential Promotion Channel] Recently, the model launched a price reduction promotion activity in Foshan market, with the highest preferential amount reaching 26,000 yuan, which reduced the minimum starting price to 95,900 yuan. If you are interested in this model, you may wish to click "Check the car price" in the quotation form to get a higher discount.

佛山地区启辰大V

The super-hybrid design of Qichen V DD-i is eye-catching. The front face adopts a family-style design language, and the front grille presents a wide V-shape, which echoes the brand logo and highlights its unique identity. The overall lines are smooth, and the body presents a dynamic posture. With streamlined roof lines and sharp headlights, it shows a sense of technology and sports. The overall style is simple without losing the atmosphere, which shows the innovative spirit and design strength of Qichen brand.

佛山地区启辰大V

Qichen V DD-i super hybrid has a body size of 4607*1917*1624 mm and a wheelbase of 2700 mm, which gives it spacious interior space. The side lines of the car are smooth and dynamic, forming a natural extension from the front face to the rear of the car, outlining a compact and powerful visual effect. The front and rear wheel tracks are 1640 mm, which ensures the stability and handling of the vehicle during driving. With 19-inch rims, the tyre size is 235/55 R19. Its unique rim design not only enhances the visual impact of the whole vehicle, but also provides good grip and comfort for driving.

佛山地区启辰大V

Qichen V DD-i super hybrid interior design is based on simplicity and sense of technology. The center console adopts a 12.3-inch central control screen, which supports voice recognition control system and brings convenient operation experience. The steering wheel is wrapped in leather, which makes it feel comfortable. At the same time, it supports manual adjustment up and down and back and forth to meet the individual needs of different drivers. The front row is equipped with mobile phone wireless charging function, which is convenient for drivers to charge at any time. In terms of seats, Qichen V DD-i super hybrid seat is made of imitation leather, and the main driving seat has the functions of front and rear adjustment, backrest adjustment and 2-way height adjustment, providing a comfortable driving experience. The co-pilot seat also supports front and rear adjustment and backrest adjustment, which brings passengers a comfortable riding experience. The rear seats can be laid down in proportion, providing more storage space to meet the needs of different scenes.

佛山地区启辰大V

Qichen V DD-i super hybrid system is equipped with a 1.5T turbocharged engine with a maximum power of 120kW and a maximum torque of 230 N m.. The matching E-CVT continuously variable transmission makes the power output smoother and more efficient, providing excellent driving experience for drivers.

The owner of car home spoke highly of Qichen V DD-i super hybrid, saying that it was his first electric car, and the experience was very satisfactory, much better than that of a pure oil car. He particularly emphasized the power feeling, pointing out that the motor started vigorously and smoothly, and there was no sense of shifting, which was the main reason why he chose this car. In addition, as his first SUV, Qichen V DD-i super hybrid has performed very well in sitting posture, vision and space, and the rear seats are spacious and suitable for home use. In terms of appearance, the white body looks atmospheric and fashionable, while the green is fresh and special. In terms of fuel consumption, Qichen V DD-i super hybrid has performed well on urban roads, especially in traffic jams, which can significantly reduce fuel consumption and save users a lot of costs.

Fenglanda in Tianjin is on sale! The latest offer is 95,800, so don’t miss it.

On the [car home Tianjin Preferential Promotion Channel], a car that has attracted much attention is giving back to consumers with amazing discounts. At present, consumers in Tianjin can enjoy a cash discount of up to 30,000 yuan, making Fenglanda, which was originally close to the people, more affordable. The starting price has dropped to 95,800 yuan, which undoubtedly provides a rare opportunity for car buyers. If you want to seize this preferential opportunity, you may wish to click the "Check Car Price" button in the quotation form, so that professional car consultants can provide you with more targeted preferential information and make your dream of buying a car come true.

天津地区锋兰达特价出售！最新报价9.58万，不容错过

Feng Landa’s design combines dynamic and fashion, showing unique charm. In the front part, it adopts an integrated design, and the air intake grille adopts exquisite chrome-plated elements, which set off with LED headlights to create a sharp and powerful visual impact. The overall style is elegant without losing the sense of strength, and the lines are smooth, which shows the consistent sense of high quality and dynamic aesthetics of Toyota brand. The proportion of the car body is coordinated, and the details are exquisite, so that people can identify their unique identity at a glance.

天津地区锋兰达特价出售！最新报价9.58万，不容错过

Flananda shows its side charm with its unique body design and proportion. The body size is 4485mm*1825mm*1620mm, and the wheelbase is 2640mm, which realizes a compact and stable body layout. The lines on the side of the car are smooth, which shows the combination of strength and dynamics. The front wheel track of 1565mm and the rear wheel track of 1580mm ensure good driving stability. The exquisite tyre size 215/60 R17 with rim design not only enhances the visual effect, but also ensures the comfort and grip during driving. On the whole, the side design of Fenglanda reflects its balanced aesthetics and practicality.

天津地区锋兰达特价出售！最新报价9.58万，不容错过

The interior design of Fenglanda is characterized by its exquisiteness and practicality. The center console uses a 10.25-inch large screen, which is clear and easy to operate, and integrates multimedia functions to facilitate drivers to grasp vehicle information and entertainment needs at any time. The steering wheel is made of plastic. Although it is not high-grade leather, it feels stable and easy to hold. In the humanized design, the steering wheel supports manual adjustment up and down and back and forth to meet the needs of different drivers. The car is equipped with a Type-C interface, including one in the front row and two in the rear row, which is convenient for passengers to charge and connect electronic equipment. The seats are mainly made of fabric, and the seats are rich in functions. The main seat supports front and back, backrest and height (2-way) adjustment, and the auxiliary seats also support front and back and backrest adjustment, while the second row of seats are equipped with backrest adjustment function to provide passengers with a comfortable riding experience. The overall interior pays attention to practicality and comfort, taking into account the various needs of family travel.

天津地区锋兰达特价出售！最新报价9.58万，不容错过

The car is equipped with a 2.0L engine of Fenglanda, with a maximum power of 126 kW, which outputs surging power. The maximum torque of this L4 engine is 205 Nm, and with the efficient CVT continuously variable transmission (simulating 10th gear), it ensures the smooth and strong power performance of the vehicle during driving.

To sum up, car home car owners are full of praise for Fenglanda. He said that the exterior design of Fenglanda is not only atmospheric, but also full of domineering, and the spacious interior space is impressive, so even tall passengers can ride comfortably. What impressed him most was the fuel economy of Fenglanda, which undoubtedly brought great convenience to his daily travel. Generally speaking, Fenglanda has won the satisfaction and trust of car owners with its excellent performance in many aspects.

Extreme Fox Alfa T5 Car Purchase Manual is the first choice for new middle-class families.

For a car, you can’t talk about heroes purely by the quality of dynamic performance, just like other aspects of performance are also worth talking about. Let’s get to know each other.

First look at the appearance of the polar fox Alpha T5. The front face design of the polar fox Alpha T5 is very clean and unforgettable. Coupled with the headlights, the momentum is quite sufficient. The car is equipped with LED daytime running lights, automatic opening and closing, adaptive far and near light, delayed closing and so on. Coming to the side of the car body, the size of the car body is 4690MM*1936MM*1650MM, and the car adopts simplified lines, which gives people a very dignified feeling. With large-sized thick-walled tires, the overall visual effect is very exquisite. In the rear part, the rear looks younger, and the taillights show exquisite design style, which is very hard-core.

Coming into the Extreme Fox Alfa T5 car, the interior looks very domineering and soft. The steering wheel of the car is very in line with the interior style, using imitation leather material, and the shape is very fighting. Take a look at the central control, decorated with a 15.6-inch central control screen, which makes the interior style impressive and looks unique. The interior feels good. Let’s take a look at the dashboard and seats. The car is equipped with a concise dashboard and the shape takes the sports route. The car adopts imitation leather seats, which are wide and thick, and the overall comfort and wrapping are not bad.

Extreme Fox Alpha T5 matches the gearbox, with an acceleration time of 7.5s per 100 kilometers, and the power is completely OK for daily use.

Equipped with car networking, driving mode selection, remote control key, Bluetooth key, interior atmosphere light, traction control (ASR/TCS, etc.) and other configurations, it has rich functions and greatly improves its convenience.

I wonder if you are excited about this car introduced today? If you are going to buy a car, you might as well think about it.

Esther Yu’s way of speaking is too artificial, but he succeeded in attracting enough attention.

Esther Yu speaks.

Original title:"Youth has you 2" Esther Yu speaks. Is Esther Yu’s family rich?

Are Esther Yu and Zhao Zhiwei still together?
Now, the second season of "Youth with You" has finally begun, and several program-related entries are not surprisingly listed in Weibo hot search, and Qing 2, who has been saving her strength for so long, can be regarded as a good start.

However, the draft is always accompanied by controversy. This time, the tone of Esther Yu, a junior 2 player, became the biggest topic of the first program.

In this program, Xiao Bian’s first impression of her actually comes from the sentence "This practice is less than a month" said by Ella’s tutor.

I believe many people have such a question, are you sure this is not for soy sauce or eyeballs?

After all, as an actress, coupled with the just-hit film and television drama, it is hard not to make people think so.

Although other trainees will not spend four or five years, they will not stand on this stage in just one month, will they?

Esther Yu speaks.

Although Xiao Bian likes Cai Minmin, who plays her role in "The Next Stop is Happiness", as the saying goes, interlacing is like a mountain. For this draft, Xiao Bian does not have much expectation for her.

But what people didn’t expect was that Esther Yu’s next interaction was surprising.

Some people may think that this is a kind of cuteness that belongs to her, but more people still think that it is too artificial, and they have given her a new name "Xiaozuojing", which is unbearable to listen to, and this sense occupies the vast majority of the audience.

As far as Xiaobian is concerned, I also think it is a little small.

From her entrance to the interaction with the tutor, to being next to Jony J on her own initiative, her deliberate performance is still a bit too obvious, no matter her eyes, tone or movements.

This way of speaking may attract enough attention, but it is obviously not understood and accepted by the public.

Especially after expressing the position of wanting to be JONY J’s teacher, it gives people a very rude feeling.

Esther Yu speaks.

Dongfeng Warrior 917 made a shocking debut on the market, a new choice for luxury electric off-road vehicles.

It is a large and medium-sized luxury electric off-road vehicle owned by Dongfeng Motor, which is produced by Dongfeng Technology. Warrior 917 was officially listed at Chengdu Auto Show on August 25th, 2023, and then listed in Switzerland in April, 2024, and opened the pre-sale of Jiaolong Armor.

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Warrior 917 offers two models: pure electric version and extended range version. The specific price is as follows: pure electric basic version: the price is 697,700 yuan, reaching 800kW and the cruising range is 505 kilometers. Extended range basic version: the price is 637,700 yuan, and it adopts the combination of three motors and 1.5T range extender, with a comprehensive horsepower of more than 800 horses and a comprehensive cruising range of more than 800km. In addition, the pre-sale price of Warrior 917 Xiaolong armor is 768,000-868,000 yuan.

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Appearance design, body size: 4987mm long, 2080mm wide, 1935mm high and 2950mm wheelbase. Design concept: the overall design adopts the design concept of male soul, and the front face is designed in the east. The design elements such as trapezoidal lion-roaring array grille, cross target headlights, and sword-finger rear taillights show their temperament. The car body color offers a variety of choices, such as matte paint, matte paint, matte paint and so on.

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Interior and configuration, interior style: Wan Li Jiangshan theme style, beacon air conditioning air outlet design, pistol armrest design and other unique. The cockpit is equipped with a five-screen intelligent interactive system, and a multi-functional aircraft shift handle with functions such as shifting, chassis lifting and off-road mode adjustment. Sound system: equipped with Dana Confdence confidence series sound, providing high-quality hearing enjoyment. Science and technology configuration: The Eagle Eye UAV system carried by Warrior 917 has the function of road monitoring, which can survey environmental information such as road topography, slope and angle, and support synchronous intelligent path planning.

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Power and performance, pure electric version: driven by front and rear four motors, it can achieve power output of more than 1000 horsepower, with excellent performance of zero acceleration. Extended range version: the combination of three motors and 1.5T range extender is adopted, with comprehensive horsepower exceeding 800 horsepower and comprehensive endurance exceeding 800km.

Since its listing, Warrior 917 has attracted the attention of many consumers with its unique design and powerful performance. Users gave it a high rating, showing the market’s recognition of this model. To sum up, as a luxury electric off-road vehicle owned by Dongfeng Motor, Warrior 917 has outstanding performance in design, interior configuration and power performance, and has high market competitiveness.

Ding ~ all the knowledge about soybean oil is here!

Last week,

We told you a little knowledge about soybeans.

Today, small farmers continue to talk to you about soybean oil.

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As we all know, soybean is a frequent visitor to people’s dining table because of its rich nutrition, and soybean oil is also an important cooking material that many families like. So, how is soybean oil extracted? What are the nutritional values of soybean oil? Today, we invited Liu Changsheng, an expert from the Institute of Oil Crops, Chinese Academy of Agricultural Sciences, to answer your questions one by one.

I don’t know if you are as curious as a small farmer,

Delicious soybeans,

How did it "change" into oil?

Extraction of soybean oil

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According to experts, as the name implies, soybean oil is extracted from soybeans, and there are many extraction methods, among which squeezing and leaching are common.

Squeezing mode:By adopting the physical squeezing process, the oil is produced by physical squeezing in the production process, and there is no additional additive, so the crude oil is of high quality, complete in color, fragrance and taste, and retains various nutritional components in soybean, with high nutritional value.

Leaching mode:Soybean leaching oil was obtained by the principle of oil leaching with oily solvent.

Because of the low oil content of soybean, soybean oil can be extracted well by one-time leaching process, and the residual oil of soybean meal after leaching is below 1%. Leaching method is common in large processing plants.

Nutrition of soybean oil

After soybeans are made into soybean oil,What is the nutritional content?

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Soybean oil has a long edible history and rich nutrition, especially the fatty acid composition in soybean oil. In soybean oil, linoleic acid content is prominent, which can reach 50% ~ 60%. Linoleic acid is an essential fatty acid, which is beneficial to human health. In soybean oil, the content of oleic acid (unsaturated fatty acid) is 20%, and the content of saturated fatty acid is low, only 15%.

Secondly, there are trace elements in soybean oil (also known as lipid companion), which is rich in vitamin E, phytosterol and lecithin, which is very beneficial to human health.

Is soybean oil suitable for everyone?

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Experts say that the human body needs three nutrient elements (carbohydrate, protein and fat), and we need them every day in our life, so a proper intake of soybean oil (fat) can meet human needs.

However, excessive intake of soybean oil is not recommended for people with basic diseases, such as biliary tract diseases (gallstones, cholecystitis, etc.); People with "three highs" (hyperlipidemia, hypertension and hyperglycemia) should not take too much; People with intestinal system deviation should not take too much.

What is the best way to eat soybean oil?

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Soybean oil is suitable for any cooking method of Chinese food.

If it is used for high-temperature frying, you can buy soybean oil specially used for frying.

However, the soybean oil squeezed physically has more comprehensive nutrition retention and is more suitable for cold salad. If it is used for cooking, it is necessary to control the oil temperature and not stir-fry at high temperature to avoid nutrient loss caused by too high oil temperature.

How to choose soybean oil?

1, look at the quality level

According to Soybean Oil (GB/T 1535—2017), the finished soybean oil is divided into three grades according to its quality index.

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Source: GB/T1535-2017 Soybean Oil

The first-class edible oil fume has high point, clear color, light fragrance and taste, and less oil fume when cooking, which is suitable for high-temperature stir-frying and deep-frying.

The third-grade edible oil is just the opposite, because it is moderately processed, so it has a strong flavor and taste.

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2, look at the processing technology

Squeezing oil separates oil from raw materials by physical method, which retains more nutrients, but the cost of squeezing process is higher and the price is more expensive. The extracted oil has high oil yield, low production cost and relatively cheap price.

3, look at the color depth

The color of soybean oil is not directly related to the quality of oil, but to the variety of soybean. Basically, the color of soybean oil is light yellow to golden yellow, and the color of soybean oil squeezed by some varieties is relatively dark. If the color of soybean oil is very light, it may be decolored.

It is worth noting that do not buy bulk oil of unknown origin.

Is it a rumor that soybean oil contains trans fats?

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Whether trans fat is contained in oil is related to the processing technology. If oil is pressed at low temperature, there is basically no trans fat. If it is treated at high temperature during processing, a small part of polyunsaturated fatty acids in soybean oil may change from cis to trans fatty acids, so it may change during this processing.

Of course, you don’t have to worry. In fact, except soybean oil, most vegetable oils will have this possibility during processing, but the trans-fatty acid content is not high. The study found that the trans-fatty acid content in refined first-grade soybean oil is mostly below 0.2%, which will not affect the body.

Edible oil consumption suggestion

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Control total intake

According to the recommendation of Dietary Guidelines for China Residents (2022 Edition), the daily edible oil intake of residents needs to be controlled between 25 and 30 grams. For health reasons, this recommended value is recommended to be strictly observed.

Control cooking oil temperature

Don’t wait until the oil smokes before putting the ingredients into cooking, because the edible oil rich in polyunsaturated fatty acids is not recommended for high-temperature cooking to avoid excessive oxidation.

Control cooking methods

Excessive intake of edible oil may cause metabolic diseases, and delicious dishes can be cooked with less oil. The cooking method should be mainly steaming, boiling, stewing, stewing and frying, with less frying and frying, and air fryer can be used instead of frying.

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