Planting summer vegetables to prevent high temperature barriers
Many vegetable farmers who planted summer vegetables reported that due to the high temperature in the shed (the highest temperature in the shed reached 40 °C at noon), the vegetables grown in the shed grew poorly, like the burning edge of the leaves of tomato leaves, the phenomenon of falling flowers and falling fruits. Severe, peppers have a large number of sunburn fruit and umbilical rot fruit, beans and vegetables are characterized by serious flowering and falling pods, etc., and these are caused by high temperature barriers caused by excessive temperature in the shed. So how should vegetable farmers reduce the temperature in the shed to prevent the occurrence of high temperature barriers in the shed? First, strengthen ventilation and reduce the temperature of the shed. When planting the summer vegetables, the vegetable farmers should pay attention to the high temperature obstacles in the vegetables in the shed. It is necessary to open all the upper and lower air outlets of the greenhouse, so that the cold air outside the shed enters the shed and form convection with the hot air in the shed to accelerate The discharge of hot air is conducive to the reduction of the temperature inside the shed. It is necessary to remind the vegetable grower that when the wind is released, a windshield film should be placed under the air outlet to prevent the cold wind from blowing directly onto the fruit surface of the vegetable, causing the fruit to appear as a skin, a crack, and the like. Second, use a shade net to cool down. When the temperature in the shed cannot be controlled within the requirements of suitable vegetable growth by the method of air release, the vegetable farmer preferably uses a shade net to cool down. The vegetable grower should put down the sunshade net when the temperature in the shed is close to the highest temperature suitable for vegetable growth. When the temperature in the shed is lower than the highest temperature for growing vegetables, the sunshade net can be rolled up, but pay attention to put the sunshade net down. Do not block the air outlet. When purchasing a shade net, the vegetable grower can choose a shading rate of about 60%, because the shade net can play the role of shading and cooling, preventing the sunburn fruit, and allowing some of the light to shine inside the greenhouse, which is beneficial to The improvement of photosynthesis in vegetable leaves. Again, the spray is cooled at noon. At noon in summer, because the temperature in the shed is high, the evaporation of the leaves is large, and the water absorbed by the roots cannot meet the needs of vegetable transpiration, and the tomato leaves appear to be rolled up. The vegetable grower can install the micro-sprinkler spray in the shed to reduce the temperature of the shed. This can also increase the humidity of the air in the shed, prevent the dryness of the stigma of the vegetable style, promote pollination, and prevent the fruit from falling and falling. Finally, the vegetable farmers can also spray foliar fertilizer such as chitin, amino acid and alginic acid on the leaves of the vegetable in the shed to promote the healthy growth of the vegetables and improve their resistance to high temperature.
About high speed Door Accessories:
1.Driving system: High Speed Door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box
2.Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light
For some main accessories, here is detain introduction:
1).24G radar sensor:
Brand: Hofic
Technology: Microwave processor
Maintain time: 0.5s
Protection: IP54
Transmitting frequency: 24.125GHz
Maximum installation height: <5meter
Transmitting power density: <5mw/cm2
Power consumption: <1W(VA)
Installation angle: 0-90°(lengthways) -30-30°(crosswise)
Supply voltage: AC&DC 12V-30V
2).Photocell:
Approval CE & ISO9001
Power supply AC/DC 12-30V
Static current 25A
Action current 40mA
Mounting distance Max 10m
NO or NC contact Done by NO./NC. contact selection
Working environment temperature -42℃ to +45℃
Working environment humidity 10 to 90%RH
Appearance dimensions( controller) 123*50*32mm(L*W*H)
Appearance dimensions(Magic eye head) 19*13mm(L*D)
3). Remote control
Operating Voltage: AC220V/50HZ+-20%
Transmit power:≤100mW;Super regenerative module, strong anti-interference
Operating temperature:-30℃-+70℃
Working frequency: 433MHZ;transmitter 1527, millions of encoding chip
Accept sensitivity:≤110dB
Manipulation method: electric remote control
Configure the quantity: Wireless number; factory configuration transmitter two. Can be equipped with PT2272 digital decoder chip
Configure the function: Up, down, stop, anti-lock full-featured reproduction
4). Magnetic loop
Voltage: 12V AC/DC +-10% 24V 115V AC+-10% 230V
Power: <2VA
Continued electrical output: 7A / 250V AC
Frequency range: 20 to 200K Hz
Response time: infinity (factory setting) or adjust maintain time
Sensitivity: 0.01% to 0.1% divided into 3 levels
Protection level: IP30
Electromagnetic compatibility (EMC) Complies with EM50081-1 and EN50082-2
Detection loop inductance: the limit of 40uH to 100uH ideal value 80uH to 300uH
Operating temperature: -25 ℃ to 70 ℃
Storage temperature: -40 ℃ to 85 ℃
Relative humidity: <90% non-condensing
Temperature compensation: automatic compensation up to 50 ℃ / h
Connection type: 11 pin DIN rail socket
Dimensions: 41 * 78 * 85 mm (width * height * length)
Weight: 250 grams
5). manual push button
This exit switch button is made of ABS and has built-in indicator light make it looks more elegant and fashionbale. It can be widely used in public entrance gates, public door, home, office, hotel, etc.
Door Exit Button Push To Exit Switch Door Opener For Access Control Security
Main Feature
Fashionable appearance
Made of ABS Plastic
Easy to install and operate
Used for access control
Specification
Mechanical Life: 500,000 test
Material: Plastic
6). Limit switch encoder
Voltage: DC5V-24V
Output voltage: high voltage≥85%Vcc, low voltage≤0.5V
Maximum mechanical speed:6000rpm
Anti-vibration: 50m/s,10-200HZ,XYZeach way 2 times.
Current consumption:≤30mA
Response frequency: 0-100KHZ
Protection: waterproof,oil proof,dust prevention, IP54
The output code system: binary code
Operating life: MTBF≥30000(+25℃,2000rpm)
Rotational inertia:4.0x10-8kgm²
Maximum load:radial direction20N
Axial direction:10N
Weight: about 0.4kg
High Speed Door Accessories,High Speed Door,Electronic High Speed Door Accessories
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffastdoor.com