4. Rack installation connecter
3. Bearing block: coopersleeve or nylon Sleeve
2. Rack and pinion: curved or directly rack, nylon or cooper sleeve for the pinion
1. Gear motor : 550W/750W
Choose the best location for your cool frame. In order to increase warmth and sunlight and your cold frame, choose an optimal area to put your structure. Select a south-facing spot that provides lots of sunlight. Avoid areas near trees or other structures where snow or leaves can put on your cold body. This could result in damage to your structure or sunshine blockage.
Allow ventilation on hotter days. Too much warmth isn’t always a good thing – and that’s the advantage of a cold framework greenhouse. Since outdoor sunlight and temperature influence a cold frame’s inner temperature, easily modify your cold framework during unseasonable high temperature waves. Of these occasions, open your structure and invite sufficient airflow to give plants desired warmth without suffocating them.
Use your cold frame for growing within your means. As stated previously, frosty frames are great for extending the growing season of cool-time of year vegetables in the springtime and winter season. When hardening off tender plants and seedlings, chilly frames also enable an easier transition for vegetation from inside to outdoors. Stick to options that survive inside your location’s current environment range, not totally out-of-season plant types. The internal temperatures are only somewhat warmer and more managed compared to the outdoors. So, vegetation should manage the highs and the lows of your area fairly well while secured in your frosty frame.
The rack and gear rack for Greenhouse pinion drive system is for the mult-span agriculture venlo greenhouse ventilation system, it can be used for the medial side window openingh or the roof widoiw opening system. The rack and pinion system move smoothly and dependable. and may be control automaticly.
Extend the season for cool-period crops. Because chilly frames provide a somewhat warmer and more controlled environment than external temperatures, these systems help gardeners start plant life without worry of frost or frozen ground. Plants won’t be suffering from unseasonably cold or warm weather we often experience during spring and fall. Frosty frames work 
great for cool-season plants because they can withstand the low evening temperatures.
Overwinter dormant plants. While a cold framework greenhouse won’t allow tender plants to keep growing through winter season, these structures can protect them during dormancy. When overwintering plant life, minimize sunlight and keep maintaining adequate soil dampness. This ensures plants won’t attempt to develop but don’t completely dry out either.
Harden off delicate plant life and seedlings. Cold frame greenhouses help plants make the changeover from indoor plants to outdoor vegetation. Whether you started seedlings in your home or a greenhouse, vegetation must gradually adapt to the change in temperature, sunlight, dampness, and exposure outdoors. With a cold framework, plants are controllably subjected to these adjustments, while still remaining sufficiently safeguarded. Once plants adjust to the climate modify in your cold framework, after that transplant them to your backyard.
Cold frame greenhouses are relatively simple to use for any or all of the reasons listed above. However, keep these couple of tips in mind to be able to maximize the benefits of your structure.