Cluster-type water temperature control system for floating tobacco seedling growing pond

Abstract

A cluster-type water temperature control system for a floating tobacco seedling growing pond comprises an external heat exchange type water pond heating device, a plurality of independent water pond water temperature controllers, a control bus and a central control computer, wherein the external heat exchange type water pond heating device is used for heating a water pond; as an external heat exchange type heating mode is adopted, all parts are mounted outside the seedling growing pond, and the modifying and mounting operations are convenient on the basis of a conventional seedling growing pond; the independent water pond water temperature controllers are used for accurately controlling the water temperature of a single seedling growing pond by controlling a combined action of an electromagnetic valve and a circulating water pump; and the independent water pond water temperature controllers are connected with the central control computer through the control bus to form a cluster-type control system for achieving centralized monitoring. By using the system, the water temperature of the floating seedling growing pond can be adjusted to an optimal seedling growth temperature, so that the seedling growing time is shortened, the tobacco seedling quality is improved, and the purposes of improving productivity and efficiency are achieved; and the system has the advantages of convenience for mounting and use, preciseness for control, high automation level and the like.

Description

Technical field [0001] The invention relates to a cluster type tobacco floating nursery pond water temperature control system. Background technique [0002] The purpose of tobacco seedling cultivation is to provide timely, sufficient, robust and neat tobacco seedlings for field production. Floating seedling is a soilless seedling raising method in which seeds are sown in a seedling tray equipped with a substrate, and the seedling tray floats on the surface of the nutrient solution in the nursery pond to complete the entire seedling process. It is in terms of intensive management, production efficiency and quality of tobacco seedlings. , Has the management and technical advantages that conventional seedlings can't compare, its successful research is a major change in the history of tobacco seedlings. Floating seedlings technology has been widely used in my country. In 2009, the floating seedlings area was 1.1182 million hectares, accounting for 97.02% of the total area. [0003] F...

AI Technical Summary

Problems solved by technology

During this period, most tobacco areas had problems such as low temperature, large temperature difference between day and night, and low temperature of nutrient solution in seedling ponds, which seriously affected the emergence time of tobacco seedlings and the cultivation of strong seedlings.

[0004] At present, the temperature control of tobacco seedlings is mainly achieved through plastic sheds or greenhouse insulation, and it is difficult to reach the optimum temperature for seed emergence and growth when the ambient temperature is low

The use of modern greenhouse seedlings can heat the greenhouse as a whole and perform precise temperature control, but this will greatly increase the cost of seedling cultivation

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