The first figure you see a miniature a greenhouse with its own heating plant. With a greenhouse you can grow radishes, green onions, parsley, lettuce and other fresh greens. Externally it is a small-sized wooden cabinet with a sloping glazed side frames. It's easy to raise these frames, because they hinge connected with frame closet then opens access wooden mailboxes filled underground. Total inside greenhouses 12 boxes: on bottom tier their 8 at upper - 4. Such placing chosen with so that acted peculiar green conveyor. If in first four drawers installed on bottom tier and in the less illuminated part of the greenhouse, the seeds are sown yet, in the second quartet in the same tier, they sprouted, and in boxes at the top, very lit tier Soon it will be possible to harvest their crops.
size and production technology of greenhouse cabinet we do not give - to put together it from the well-matched one to one and thick plywood boards were not working. Not cause difficulties and work related to the glazing frames. Starting points for determining the dimensions of the greenhouse can serve: the size of boxes (they can adopt, such as those: 25X25X15 or 30X30X15 cm - in any case, whatever took length and width height should be least 15 cm) spacing tiers and dimensions heating installation. About this installing worth telling specially.
noticed long ago that photosynthesis and associated accumulation organic mass attending sooner than more sunlight falls on plants than above surrounding temperature. With regard to sunlight, beginning in mid-March is already quite enough, even at mid-latitudes our country. But there is no heat. During the day, but especially at night the temperature can drop, so the greenhouse cabinet made of wood, available material low conductivity heat.
Töplitz has automatic regulator temperature inside cabinet - the control is over the two sensors: one mounted outside the cabinet, another - inside. Temperature inside always follows maintain interval +18 ... +25 ° C and below +10 ° With she should not fall. Attained it multiple paths. In clear day sunbeams heated inner volume greenhouses and if stacked thermometer rises behind mark + 25 ° C can reveal ventilation windows envisaged for lateral parts cabinet. In overcast days but especially at nights More frosts are possible, then the temperature inside the greenhouse could fall so that plants will die. To avoid this, a case should be moved in a heated room.
And if such facilities do not, then we can proceed differently. Land in the boxes, the air inside the greenhouse will not be rapidly cooled, if cupboard all sides conceal insulating mats eg from porolone or compatitors. Mats effectively retain heat only if inside the cabinet is the source of heat. So the heat source is a steel pipe, .. bent to form a rectangular frame. The frame is fixed under the platform of the upper tiers. The pipe ends are connected to the small steel Backa capacity of 2 - 3 liters installed on the outer side of the greenhouse enclosure. Tank and pipe filled with water and form a heating system. Water in the tank can be heated with a kerosene lamp or an electric kettle with 100 Tues
WARNING: Sources of heat thermal energy should be properly braced. The figure kerosene lamp mounted on a hinged steel housing. In the enclosure should provide the ventilation holes of small diameter. All combustible insulation materials should not touch with housing.
The second figure shows a general view of another greenhouse enclosure. Frame it assembled from parts made of duralumin sheet 3 mm thick or steel sheet 1 mm thick and the window glass.
main advantage of this framework is that it is easily assembled and disassembled and folded flat parts do not occupy too much space. Species, explaining the construction of locks, which tie flat details are shown in the figures. Dimensions of the cabinet may be the same as the first, wooden. Then all the internal equipment - the number of boxes, bunk their location, heating system - remains unchanged.
B. Krivonosov. Magazine Junior Technician.
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