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 frosty frame. In order to maximize warmth and sunlight as well as your cold frame, pick an optimal location to put your structure. Choose a south-facing spot that offers lots of sunlight. Avoid spots near trees or additional structures where snow or leaves can pile on your cold framework. This may result in damage to your structure or sunshine blockage.
Allow ventilation upon hotter days. An excessive amount of 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 body during unseasonable heat waves. Of these occasions, open your structure and invite sufficient airflow to provide plants desired warmth without suffocating them.
Use your cold frame for growing inside your means. As mentioned previously, cold frames are great for extending the growing season of cool-period vegetables in the springtime and wintertime. When hardening off tender plant life and seedlings, cold frames also allow for a less strenuous transition for plant life from inside to outdoors. Stick to choices 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 managed than the outdoors. So, plants should deal with the highs and the lows of your area fairly well while guarded 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 side window openingh or the roof widoiw opening system. The rack and pinion system move smoothly and dependable. and can be control automaticly.
Extend the growing season for cool-season crops. Because cool frames provide a somewhat warmer and more controlled environment than external temperatures, these devices help gardeners start plant life without worry of frost or frozen floor. Plants won’t be suffering from unseasonably cold or hot weather we often encounter during spring and fall. Frosty frames work ideal for cool-season plants because they can withstand the lower evening temperatures.
Overwinter dormant plant life. While a cold framework greenhouse won’t allow 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 plants won’t attempt to grow but don’t completely dry out either.
Harden off delicate vegetation and seedlings. Cold body greenhouses help plant life make the transition from indoor vegetation to outdoor plants. Whether you started seedlings in your house or a greenhouse, plant life must gradually change to the change in temperature, sunlight, moisture, and exposure outdoors. With a cold body, plants are controllably gear rack for automobile exposed to these adjustments, while still keeping sufficiently protected. Once plants change to the climate alter in your cold body, then transplant them to your backyard.
Cold frame greenhouses are not at all hard to use for any or all the reasons in the above list. However, keep these few tips in mind in order to maximize the advantages of your structure.