But it's an antique after all. What makes it occupy a place in today's various heating methods? Today, Bian Xiao will tell you what benefits it has and make people flock to it!
First, the advantages of fire resistance
1, Kang has a good thermal insulation effect, and it is the main means of heating in Northeast China. Hot kang warms the bed, which makes people feel sleepy as soon as they lie down, and bored until dawn, which is very comfortable! It is an excellent method to treat insomnia. People who have never slept in an overheated kang can never imagine that feeling. Just look at Wang Xingren's expression!
2, it is the inheritance of traditional etiquette! In the northeast, when guests come, they always make way for the hot kang. If the elders are on the kang, that position is etiquette, respect and filial piety!
3, can cure diseases! Lying on the kang can promote blood circulation, prevent and relieve the pain of rheumatism and arthritis, and may even be cured after long-term use! If you have a backache and stomachache and lie on the hot kang, the warm hot air will pass through your skin and reach the kidney and spleen of the grain ear. Not to mention that all diseases will disappear, but it will definitely make people feel Shu Tai!
4, you can exercise, the fire kang in the northeast is wider, not as narrow as the bed now, you can do yoga somersaults and be free. It is not only good for the health of adults, but also good for children to play and avoid catching a cold.
Second, the structure of the kang
Before the popularization of red bricks, kang was mostly adobe, usually with a stove. The heat of boiling water and cooking on the stove is used to heat the kang for warmth. But the disadvantage of this method is-what if you don't need to boil water for cooking, but you need to heat it ... so this form of kang is still relatively rare at present.
In terms of materials, adobe is basically eliminated by kang at present, and cement boards and red bricks are used.
Formally, the current fire kang was born out of the stove kang, but it began to become an independent heating system!
Third, the principle of fire prevention
Simply put, the principle of fire-resistant kang is to heat the surface of fire-resistant kang by using the heat generated by wood or coal combustion, and the flue gas after temperature reduction is discharged from the chimney through the flue.
A kang consists of a kang surface and a flue, and the structure of the flue is several lines, which will form what the northeast people call a kang head and a kang point. The entrance of flue gas is kang, at the end of one kang channel, and the exit of the beginning of the other kang channel is kang tip, which is the place where smoke comes out, which is slightly cooler than kang. Flue gas enters the kang channel from the kang head, transfers heat to the panel through the fire channel and flue, and is finally discharged out of the room through the chimney.
In the layout of kang, the position of burner is very important. The traditional stove is connected with the kang, and the stove chamber is the burner. After the stove disappeared, the layout of the stove mouth was much freer. Can be placed indoors or outdoors, and the indoor burner can independently open a small compartment for the burner. But where is the best place to put the crater?
▲ Indoor crater
The advantage of putting it indoors is that it is easy to operate, and you don't have to brave the cold wind to add firewood outdoors. There is a heat source in the house, and more heat radiates indoors. However, the disadvantage is that the outside of the crater is easy to be blackened, which affects the appearance, and there is a risk that smoke will flow back into the room, and it is not hygienic to remove the fire ash. More importantly, fuel combustion will consume indoor oxygen, release carbon dioxide and carbon monoxide, and there is a risk of gas poisoning! Therefore, no matter from the point of view of hygiene or safety, it is not suitable to put the crater indoors.
If you make an independent fireplace compartment indoors, this compartment is equivalent to replacing the position of the stove. But inevitably, there will be a lot of heat loss in this carriage, which is not good.
▲ Indoor independent crater
If you put the fireplace outdoors, although you have to walk a few more steps when adding firewood, both safety and hygiene can be fully guaranteed, which can be said to be the best choice! At present, in practical use, this crater arrangement is also the mainstream.
▲ Outdoor life.
Fourth, a new type of fire kang-hanging kang
Generally speaking, the height of the panel of a kang is between 50 cm and 60 cm. In the traditional kang, the flue is directly connected with the ground, which not only increases the space for hot air to be heated, but also absorbs a lot of heat from the ground and leads it into the underground, wasting energy.
Hanging kang, a new generation of fire kang, uses red brick and cement board as overhead floor, which isolates the contact between flue and ground. It avoids the heat being absorbed by the ground, reduces the heating space and greatly improves the utilization rate of heat, which can be said to be an energy-saving structure.
▲ Overhead floor
▲ hanging kang
In the next article, Bian Xiao will explain in detail how to make an energy-saving and practical new hanging kang in combination with the specific construction process of the kang! Please look forward to friends who like Kang!