4. Rack installation connecter
3. Bearing prevent: 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 cool frame. To be able to increase warmth and sunlight as well as your cold frame, pick an optimal location to place your structure. Choose a south-facing spot that provides lots of sunlight. Avoid spots near trees or other structures where snow or leaves can put on your cold frame. This could result in damage to your structure or sunlight 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 effect a cold frame’s inner temperature, easily change your cold framework during unseasonable temperature waves. Of these occasions, open your structure and allow sufficient airflow to provide plants preferred warmth without suffocating them.
Use your cold framework for growing inside your means. As stated previously, chilly frames are excellent for extending the growing season of cool-period vegetables in the spring and wintertime. When hardening off tender plants and seedlings, chilly frames also allow for a less strenuous transition for vegetation from inside to outside. Stick to choices 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, plant life should manage the highs and the lows of your region fairly well while secured in your frosty frame.
The rack and pinion drive system is for the mult-span agriculture venlo greenhouse ventilation system, it can be utilized for the medial side window openingh or the roof widoiw opening system. The rack and pinion system move smoothly and reliable. and will be control automaticly.
Extend the growing season for cool-time of year crops. Because cold frames provide a slightly warmer and more managed environment than external temps, these devices help gardeners start vegetation without worry of frost or frozen floor. Plants won’t be suffering from unseasonably cold or hot weather we often experience during springtime and fall. Frosty frames work great for cool-season plants as they can withstand the low evening temperatures.
Overwinter dormant vegetation. 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 vegetation won’t attempt to develop but don’t completely dry either.
Harden off delicate vegetation and seedlings. Cold body greenhouses help plant life make the changeover from indoor vegetation to outdoor plants. Whether you started seedlings in your house or a greenhouse, plant life must gradually adjust to the alter in temperature, sunlight, moisture, and exposure outside. With a cold frame, plants are controllably subjected to these adjustments, while still remaining sufficiently safeguarded. Once plants change to the climate alter in your cold body, then transplant them to your backyard.
Cold frame greenhouses are gear rack for Greenhouse relatively simple to use for any or all of the reasons in the above list. However, keep these couple of tips in mind in order to maximize the benefits of your structure.