HOW MANY GREENHOUSE TYPES IN CHINA

5. Classification based on whether the greenhouse is connected across

1. Single-span greenhouse. The length of the greenhouse is not limited, but the span is only 1 span. It is also called a single-span greenhouse. Plastic greenhouses, solar greenhouses, etc. are all single-building greenhouses.
2. A multi-span greenhouse with two or more spans connected by gutters is also called a multi-span greenhouse. A lot of cash
Modern production greenhouses are all multi-span greenhouses. Multi-span greenhouses have high land utilization rate, high degree of mechanization of indoor operations, low energy consumption per unit area, and uniform indoor temperature and light environment.

6. Classification based on the number of lighting surfaces on the roof
1. Single-roof greenhouse: The roof is divided by the roof ridge, with one side as the lighting surface, the other side as the insulated roof, and a greenhouse with insulated walls. Single-roof greenhouses are generally single-span, running east-west, facing north and south. There can be light-transmitting vertical windows (walls) on the south side of the greenhouse, or the roof can be extended directly to the foundation wall without vertical windows. Greenhouses with lighting vertical windows are divided into two types: vertical windows and inclined vertical windows. According to the proportion of the horizontal projection area of ​​the lighting roof to the indoor area of ​​the entire greenhouse, single-roof greenhouses are divided into 1/2 type, 2/3 type, 3/4 type and full slope type. According to the shape of the lighting surface, single-roof greenhouses are also divided into slope-roof greenhouses and arch-roof greenhouses. Among slope-roof greenhouses, there are also one-slope, two-fold and three-fold greenhouses. From the perspective of architectural form, the solar greenhouse is the most typical single-roof greenhouse; the single-window greenhouse and the sloped greenhouse are two extremely deformed single-roof greenhouses. The former has no lighting roof and only has vertical windows for lighting; the latter has no lighting roof. Insulated roof.
2. Double-roof greenhouse A greenhouse with lighting surfaces on both sides of the roof is also called a full-light greenhouse. Multi-span greenhouses are basically double-roofed greenhouses.
7. Classification according to greenhouse heating methods

1. Continuously heated greenhouse is a greenhouse equipped with heating facilities to keep the indoor temperature above 10°C in winter. This kind of greenhouse must always be manned or have a temperature alarm system to provide a timely alarm in case of heating system failure; in addition, the thermal resistance value R of the greenhouse roof material must be less than 0.35 (m°·K)/W. 2. Unheated greenhouse A greenhouse without heating facilities is called an unheated greenhouse.
3. Temporary heating greenhouse. A greenhouse that is equipped with heating facilities but does not meet the conditions of a continuously heated greenhouse is called temporary heating.
Greenhouse is also known as intermittent (intermittent) heating greenhouse. This classification is not only to distinguish whether the greenhouse is equipped with heating facilities, but also to facilitate the calculation of snow load on the greenhouse roof.