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 right location for your chilly frame. To be able to increase warmth and sunlight and your cold frame, choose an optimal area to put your structure. Choose a south-facing spot that offers plenty of sunlight. Avoid spots near trees or additional structures where snow or leaves can put on your cold body. This could result in damage to your structure or sunlight blockage.
Allow ventilation upon hotter days. Too much warmth is not always a good thing – and that’s the benefit of a cold frame greenhouse. Since outdoor sunlight and temperature influence a cold frame’s inner temperature, easily change your cold framework during unseasonable temperature waves. During these occasions, open up your structure and allow sufficient airflow to provide plants desired warmth without suffocating them.
Use your cold framework for growing within your means. As mentioned previously, cold frames are excellent for extending the growing season of cool-time of year vegetables in the spring and winter season. When hardening off tender vegetation and seedlings, cool frames also enable an easier transition for vegetation from inside to outside. Stick to choices that survive inside your location’s current climate range, not completely out-of-season plant types. The internal temperatures are just slightly warmer and more controlled compared to the outdoors. So, plant life should deal with the highs and the lows of your region fairly well while guarded in your chilly frame.
The rack and pinion drive system is for the mult-span agriculture venlo greenhouse ventilation system, it can be used for the side window openingh or the roof widoiw opening system. The rack and pinion system move smoothly and reliable. and may be control automaticly.
Extend the season for cool-time of year crops. Because cool frames provide a slightly warmer and more controlled environment than external temps, these models help gardeners start plants without worry of frost or frozen ground. Plants won’t be suffering from unseasonably cold or hot weather we often encounter during springtime and fall. Chilly frames work great for cool-season plants because they can withstand the lower evening temperatures.
Overwinter dormant plants. While a cold framework greenhouse won’t enable tender plants to continue growing through winter season, these structures can protect them during dormancy. When overwintering plants, minimize sunlight and maintain adequate soil dampness. This ensures plant life won’t attempt to grow but don’t completely dry either.
Harden off delicate plant life and seedlings. Cold framework greenhouses help plants make the transition from indoor vegetation to outdoor vegetation. Whether you started seedlings in your home or a greenhouse, vegetation must gradually change to the alter in temperature, sunlight, dampness, and exposure outside. With a cold body, plants are controllably subjected to 
these changes, while still remaining sufficiently safeguarded. Once plants adapt to the climate alter in your cold frame, after that gear rack for automobile transplant them to your garden.
Cold body greenhouses are relatively simple to use for just about any or all the reasons listed above. However, keep these few tips in mind in order to maximize the advantages of your structure.