According to the temperature change of the
working environment, the thermostat will have some physical deformations within
the switch, resulting in some special effect. The thermostat will cause a
series of automatic control element of turning off and turning on, which is
also called temperature control switch, temperature controller, temperature protector,
referred to the thermostat. Through thermal protector, the temperature
protector will send the temperature to the thermostat and the thermostat will
send the commands to control the operation of the device in order to achieve
the desired temperature and the energy saving effect. Now the thermostat are
widely used in thermostat application appliances, motors, cooling, heating and
many other products.
The working principle of the thermostat is
automatically sampling, real-time monitoring through the temperature sensor.
The control circuit starts when the ambient temperature is higher than the
control set point. If the temperature still rise, when the temperature rose to
over-limit alarm set point, the thermostat start limit alarm function. When
temperature control can not be effectively controlled in order to prevent
destruction of the device also can be stopped by the trip device features
continue to run.
According to the function of the working,the thermostat have different types:intelligent thermostat,remote controlled thermostat,programmable thermostat,wireless Room Thermostat.
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First, the onset of symptoms at the beginning of the leaves, branches or fruit, the appearance of gray and black mold on the surface, after gradually expanding, and finally the formation of gray, dark brown or black mold layer.
Second, control methods
1, timely control of whitefly, aphids, scale insects. In particular, it is timely to prevent and control pests that cause severe soot disease in whiteflies such as citrus mealybugs and blackthorn mealybugs.
2, remove the coal pollution in the sunny days spray 10? 12 times flour or rice soup. Flour flour with flour 1 kilograms of water 3-4 kilograms and stir into the pot boiled Serve, when used in proportion to add water; spraying oil emulsion 200 to 250 times, or after the rain on the leaves of lime powder The mold layer can come off.
3, to strengthen the cultivation and management, reasonable pruning, improve the orchard ventilation and light conditions, help reduce the incidence of the disease.
Citrus orange tobacco disease prevention and control method
Cigarette and soot disease, also known as coal pollution and coal disease, is extremely common in citrus production areas across the country and is caused by a variety of fungi. The coal layer covers the citrus leaves, branch shoots, and fruit surfaces. When the coal seams are severely formed, they hinder the photosynthesis, weaken the tree vigor, cause less flowering, and have inferior fruit quality.