Local heating method and device for multi-span greenhouse

Abstract

The invention discloses a local heating method and a device for a multi-span greenhouse. The method is characterized by converting electric energy into heat energy to directly and continuously heat the roof gutter and arching rack of the greenhouse to rapidly melt snow on the greenhouse roof. The device comprises a protective plate (4), heating wires (3), locking clamps (2), a temperature sensor (10), an electric leakage protector (5), an intelligent temperature control switch (6), a power switch (7) and an external power source (8). The heating wires (3) are mounted inside the protective plate (4) where U-shaped grooves are formed, are horizontally arranged on two sides of a roof gutter (1) of the multi-span greenhouse through the locking clamps (2) and tightly contacts the roof gutter. The control over the heating process is achieved by controlling circuit on/off and power-on time. The device has a high heating speed, an obvious effect and a target heating region, is convenient for installation and maintenance and easy to operate, and high a high performance-price ratio.

Description

Technical field [0001] The invention belongs to the field of greenhouse facilities, and particularly relates to a method and device for local heating of a multi-span greenhouse. Background technique [0002] With the development of facility agriculture technology and equipment, the construction area of ​​multi-span greenhouses in my country has leapt to the forefront of the world. At present, the anti-snow disaster design of the greenhouse structure is mainly based on the basic snow pressure determined by statistical meteorological data within a certain number of years in the area. This design can meet the structural safety requirements of the multi-span greenhouse under normal circumstances. However, with the greenhouse effect and global warming, the number of severe weather such as winter blizzards in my country, especially in southern China, has increased significantly in recent years. Under severe weather conditions such as sudden and continuous snowfall in winter, the load ...

AI Technical Summary

Problems solved by technology

In this invention, the heating wire is installed in the roof arch pipe, the heating area is relatively small, and it is not easy to install and maintain daily after the greenhouse is completed; Generally, it cannot work normally to provide continuous power supply for heating wires. At present, the price of solar panels is high, the utilization rate of photoelectric conversion is low, and the power is difficult to achieve. It cannot achieve continuous power supply in snowy weather and cannot meet the requirements of ensuring the safety of greenhouses.

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