Greenhouse Greenhouse heating devices are based on the presence or absence of a greenhouse type, ie without heating greenhouses. Mainly rely on natural daylight and night warm insulation equipment to maintain the indoor temperature. Generally use relatively simple facilities, full use of solar heating in cold regions generally do not carry winter vegetable cultivation and the production of fresh vegetables in greenhouse cultivation facilities with distinctive Chinese characteristics, China's unique facilities. Greenhouse structures vary from city to classification will be more. Wall material points by playing the main barrier of dry soil greenhouse, greenhouse masonry, composite structures greenhouses; press after the length of the roof, with long and short in the back slope and slope greenhouse greenhouse; by the structure, there is wood structure, steel wooden structure, reinforced concrete structure, all reinforced concrete structure, cable structure, hot dip galvanized steel assembly structure. Cover material available solar panels and single film, and its characteristics are: low cost, structural stability, good light, and heat resistance, suitable for planting-season crops, space, land utilization, ease of planting, breeding, mechanization teaching visits. The company developed a portable greenhouse has applied for national patents.