4. Rack installation connecter
3. Bearing block: coopersleeve or nylon Sleeve
2. Rack and pinion: curved or straight rack, nylon or cooper sleeve for the pinion
1. Gear motor : 550W/750W
Choose the best location for your chilly frame. In order to increase warmth and sunlight and your cold frame, pick an optimal area to place your structure. Select a south-facing spot that offers plenty of sunlight. Avoid areas near trees or additional structures where snow or leaves can put on your cold framework. This may result in harm to your structure or sunlight blockage.
Allow ventilation upon hotter days. Too much warmth is not always a very important thing – and that’s the benefit of a cold framework greenhouse. Since outdoor sunshine and temperature impact a cold frame’s inner temperature, easily adjust your cold framework during unseasonable temperature waves. During these occasions, open your structure and invite sufficient airflow to give plants desired warmth without suffocating them.
Use your cold framework for growing within your means. As stated previously, frosty frames are excellent for extending the developing season of cool-season vegetables in the spring and winter season. When hardening off tender plant life and seedlings, chilly frames also enable a less strenuous transition for plant life from inside to outside. Stick to options that survive inside your location’s current weather range, not totally out-of-season plant varieties. The internal temperatures are only somewhat warmer and more managed than the outdoors. So, plant life should deal with the highs and the lows of your region fairly well while protected in your frosty frame.
The rack and 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 program move smoothly and reliable. and can be control automaticly.
Extend the season for cool-season crops. Because chilly frames provide a slightly warmer and more controlled environment than external temperature ranges, these devices help gardeners start plant life without worry of frost or frozen ground. Plants won’t be suffering from unseasonably cold or hot weather we often gear rack for automobile encounter during spring and fall. Frosty frames work great for cool-season plants as they can withstand the lower evening temperatures.
Overwinter dormant vegetation. While a cold frame greenhouse won’t enable tender plants to keep growing through winter, these structures can protect them during dormancy. When overwintering plants, minimize sunlight and maintain adequate soil moisture. This ensures plant life won’t attempt to develop but don’t completely dry out either.
Harden off delicate 
vegetation and seedlings. Cold frame greenhouses help plants make the changeover from indoor plant life to outdoor vegetation. Whether you started seedlings in your home or a greenhouse, plants must gradually adjust to the change in temperature, sunlight, dampness, and exposure outside. With a cold frame, plants are controllably exposed to these adjustments, while still keeping sufficiently guarded. Once plants adjust to the climate change in your cold body, then transplant them to your backyard.
Cold framework greenhouses are not at all hard to use for any or all the reasons listed above. However, keep these few tips in mind to be able to maximize the benefits of your structure.