Simple analysis of size types and condensation problems of cotton tents1

To put it simply, in a cold environment, the cotton tent is good with a single layer or with inner and outer tents. If the ventilation cover is not well designed, this problem cannot be avoided. Why? First understand where the water comes from. For sleep, one is the water vapor evaporated from the body, and the other is the water vapor exhaled from the mouth. The words qi and vapor are very different. The water vapor can be permeated by the coated fabric with breathable function, and the exhalation from the mouth starts with water vapor. Since the exhalation volume is relatively large, it becomes water vapor when the mouth is cold. The white flower is already tiny water droplets. , is larger than the pores of the breathable coating fabric, and rarely penetrates out. The fabrics with more than 100 pieces of one-meter microporous membranes like Goretex will appear inside the environment where the temperature difference between inside and outside is large.“It mists”The problem, not to mention the airtight PU fabric tent? If the function of the breathable cover is low, and the speed of water vapor drying is lower than the speed of exhalation, it will definitely condense on the inner layer of the fabric, and the fog and frost on the window are the same. Due to cost issues, tent fabrics are all cheap PU coatings. This coating is not breathable at all. Like plastic sheets, it will condense. The price of tent PU coated fabric is 4 to 8 yuan per meter, and the cheap and breathable PU coated fabric for clothing, the so-called low permeability (below 3000 breathable) price is 12 to 18 yuan per meter, cotton tent material As little as ten meters, as many as tens of meters, the cost of using breathable materials is amazing! Ferrino's MonsterLite alpine tents use breathable fabrics for more than a few thousand dollars. Commonly used cotton tent specifications 3*2 cotton tent, 2 people construction cotton tent, with excellent thermal insulation performance, can be equipped with heater or stove in winter, and can be used with air conditioner in summer. The tent is 2 meters long and 3 meters wide, with a wall height of 1.8 meters and a ceiling height of 2.1 meters. 3*4 cotton tent, 4-6 people construction cotton tent, three-layer tent, suitable for use in four seasons, warm in winter and cool in summer. The tent size is 3*4 meters, the galvanized square tube, and the rainproof canvas workmanship is subject to the military standard. 5*4 cotton tent, tent length 4 meters, width 5 meters, wall height 1.8 meters, ceiling height 3.1 meters, usable area 20 square meters (other specifications can be customized). 5*6m cotton tent, 5m wide*6m long. Three rooms with 6 windows, there are screen windows in the windows, the side height is 1.8 / the top height is 3.1 meters, and the bed can be placed. It can put 12 bed boards, 12 people can live, and 24 people can live up and down. 5*8 cotton tent, 5 meters wide * 8 meters long. Three rooms with 8 windows, there are screen windows in the windows, the side height is 1.8 / the top height is 3.1 meters, and the bed can be placed. It can put 12 bed boards, and it can also accommodate 12 people, and it can accommodate 24 people up and down. 5*10m cotton tent, the tent is 10 meters long, 5 meters wide, 1.8 meters high, 3.1 meters high, and has a usable area of ​​50 square meters (other specifications can be customized). There are galvanized square tubes and round tube supports. So how to avoid the condensation problem of cotton tents? In fact, there are many methods: 1. Choose tents with breathable fabrics in an environment where there will be no exhaled water vapor (cotton tents are used in the absence of weight requirements, which are breathable and breathable), and choose good water repellency, To prevent the lowering of the air permeability after the surface cloth is wet, this method will increase the cost; 2. Choose a double-layer tent with a breathable inner tent at the bottom of the bag, and the condensed water will flow down the outer tent. We should pay attention here. The ventilation capacity of the inner tent is very dangerous if the ventilation is not good, so it is only condensed water. In a cold environment, if the condensed water continues to frost on the inner tent, it will cause a hidden inner tent to cause hidden dangers. ; 3. Keep ventilation, this depends on the design of cotton tents, each has its own merits, especially the single-layer bottom (the floor and the tent are sewn together), the top should be well ventilated, otherwise the condensation water will flow down; 4. The big tent There can be a fire inside, but there is a structural design that does not fire, but the problem needs to always be in place. The key to a good use experience is not only the durable cotton tent, but also the careful handling of the tent's location, reinforcement and storage during use. And solving these three problems can effectively ensure the stability and comfort of the tent, and provide people with a comfortable resting environment. In order to provide people with a comfortable resting place, the site selection of engineering tents is particularly important. Therefore, cotton tents should be built in an area with open and flat terrain that will not accumulate rainwater, so as to prevent the tent from being soaked by water and unable to keep dry, and such areas are generally mud or sand suitable for construction. Require. After deciding to station, a drainage ditch should be dug around the tent to avoid the accumulation of rainwater and affect the drying of the resting environment in the tent.