4. Rack installation connecter
3. Bearing prevent: 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 chilly frame. To be able to maximize warmth and sunlight and your cold frame, choose 
an optimal location to place your structure. Select a south-facing spot that offers plenty of sunlight. Avoid areas near trees or various other structures where snow or leaves can pile on your cold framework. 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 frame greenhouse. Since outdoor sunlight and temperature influence a cold frame’s internal temperature, easily modify your cold framework during unseasonable high temperature waves. Of these occasions, open your structure and invite sufficient airflow to give plants preferred warmth without suffocating them.
Use your cold body for growing within your means. As mentioned previously, cool frames are great for extending the developing season of cool-season vegetables in the spring and winter season. When hardening off tender plant life and seedlings, frosty frames also enable an easier transition for plants 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 just slightly warmer and more controlled compared to the outdoors. So, plants should manage the highs and the lows of your region fairly well while shielded 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 gear rack for automobile 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 cold frames provide a somewhat warmer and more managed environment than external temperatures, these products 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 encounter during spring and fall. Chilly frames work ideal for cool-season plants as they can withstand the lower evening temperatures.
Overwinter dormant plant life. While a cold frame 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 keep maintaining adequate soil dampness. This ensures plant life won’t attempt to grow but don’t completely dry either.
Harden off delicate plants and seedlings. Cold body greenhouses help plants make the transition from indoor plants to outdoor vegetation. Whether you began seedlings in your house or a greenhouse, plants must gradually adjust to the modify in temperature, sunlight, dampness, and exposure outside. With a cold frame, plants are controllably exposed to these adjustments, while still staying sufficiently safeguarded. Once plants modify to the climate modify in your cold body, after that transplant them to your backyard.
Cold body greenhouses are not at all hard to use for just about any or all the reasons in the above list. However, keep these few tips in mind to be able to maximize the advantages of your structure.