1. According to the classification of greenhouse light-transmitting covering materials

(1) Glass greenhouse A greenhouse with glass as the main light-transmitting covering material. A greenhouse covered with single-layer glass is called a single-layer glass greenhouse, and a greenhouse covered with double-layer glass is called a double-layer hollow glass greenhouse.

 

(2) Thin film greenhouse All greenhouses covered with light-transmitting plastics are collectively called film greenhouses. According to the properties of plastic materials, plastic greenhouses are further classified into plastic film greenhouses and rigid board plastic greenhouses. Plastic film greenhouses are divided into small and medium-sized plastic sheds, plastic greenhouses and large plastic film greenhouses according to the size of the greenhouses (usually the latter are directly referred to as plastic film greenhouses or plastic greenhouses)

 

It should be noted that if the light-transmitting covering material of a greenhouse is not a single material, but is covered by two or more materials, the division of the greenhouse according to the light-transmitting covering materials should be carried out according to the roofing light-transmitting materials, and the materials used on the roof The material with the largest area will be the basis for final division.

 

2. According to the classification of the main structure material of the greenhouse

(1) Reinforced concrete structure greenhouse A greenhouse in which reinforced concrete members are used as the load-bearing structure of the greenhouse roof. Greenhouses with reinforced concrete members as indoor columns and bamboo and wood as roof structural members are still classified as bamboo and wood structure greenhouses.

 

(2) Steel structure greenhouse A greenhouse with steel structure materials such as steel bars, steel pipes, steel plates or section steel as the main load-bearing structure of the greenhouse.

 

(3) Aluminum alloy greenhouse A greenhouse in which all load-bearing structures of the greenhouse are made of aluminum alloy profiles. The roof load-bearing components are aluminum alloy profiles, but the greenhouses that use steel structures such as beams, trusses, and columns supporting the roof are still classified as steel structure greenhouses.

 

(4) Greenhouses made of other materials Due to the continuous emergence of new building materials, greenhouses using these materials as load-bearing structures are also emerging, such as glass fiber reinforced cement (GRC) skeleton solar greenhouses, steel-plastic composite plastic greenhouses, etc.

 

3. Classification according to the performance of the greenhouse

(1) Film shed A single-story shed with plastic film as the light-transmitting covering material is called a plastic shed. According to the size of the shed, it can be divided into plastic greenhouses and small and medium sheds. Generally, those with a span of more than 6 meters are called plastic greenhouses. Those with a span of less than 6 meters are called small and medium sheds. Plastic sheds are generally not equipped with heating equipment. Due to poor thermal insulation performance in northern areas, they cannot be used for overwintering cultivation. They are mainly used for early spring and late autumn. Generally, spring can be earlier and autumn can be delayed by about one month compared with open field cultivation. . In most areas of southern my country where the climate is relatively warm in winter, plastic sheds can be used for overwintering production. If equipped with sunshade nets, they can also be used as rainproof sheds and sunshades to realize the annual production of plastic sheds.

 

(2) Solar Greenhouse It is a single-roof greenhouse consisting of thermal insulation and thermal storage walls on the east, west and north sides, the rear insulation roof (north orientation), the daylighting front roof (south orientation), and the active insulation quilt on the front roof.

 

(3) Multi-span greenhouse The length of the greenhouse is not limited, but the greenhouse with a span of only one span is called a single-span greenhouse. Plastic greenhouses and solar greenhouses are all single-span greenhouses. 2-span and more than 2-span greenhouses connected by gutters are called continuous-span greenhouses, also known as multi-span greenhouses. A large number of modern production greenhouses are multi-span greenhouses. Multi-span greenhouses are divided into pointed roof greenhouses, arched roof greenhouses, zigzag roof greenhouses, flat roof greenhouses and shaped roof greenhouses according to the roof form.

 

① Peaked roof greenhouse. Also known as “human” character roof greenhouse or ridge greenhouse. Greenhouses covered with rigid light-transmitting covering materials such as glass and polycarbonate hollow panels are basically pointed roof greenhouses. This kind of greenhouse can have one pointed roof per span, such as a portal steel frame structure glass greenhouse, or two or more pointed roofs. A typical Venlo-type greenhouse has 2 or 3 or even 4 pointed roofs per span. A small pointed roof.

 

② Arched roof greenhouse. The roof is in the form of a vaulted greenhouse. A pointed roof greenhouse consisting of two semicircular arcs is also classified as a domed roof greenhouse. Plastic film greenhouses are basically round arch roof greenhouses.

 

③ Zigzag roof greenhouse. Greenhouses with vertical vents on the roof are collectively referred to as zigzag roof greenhouses, or zigzag greenhouses for short. The vents of the zigzag greenhouse can be directly from the roof to the gutter, which is called full sawtooth, or from the ridge to a certain part of the roof or from a certain part of the roof to the gutter, called half sawtooth, the former is pointed sawtooth, The latter are crenellated. Each roof of the crenellated greenhouse generally has 2 gutters. The roof on one side or both sides of the vertical vent can be a sloping roof, called a sloping roof sawtooth greenhouse, or a round arch roof, called an arch roof sawtooth greenhouse,

 

④ Flat roof greenhouse. A greenhouse with a horizontal or nearly horizontal roof. Insect-proof net rooms and shade sheds are often made in this form. The flat curtain movable roof greenhouse recently implemented in Europe is also a typical flat roof greenhouse. However, if the roofing material is a waterproof sealing material, the drainage of the roof and the bearing capacity of the structure should be fully considered.