PLC intelligent temperature control greenhouse

Abstract

The invention relates to a full-automatic temperature and humidity self-control greenhouse, in particular to a PLC intelligent temperature control greenhouse which comprises a semiconductor refrigerating and heating piece temperature control greenhouse membrane, a greenhouse internal circulating and humidifying device, an indoor environment monitoring greenhouse frame and an automatic air exhaustdevice. The humidity and temperature required indoors are preset through a PLC, when the indoor temperature and humidity change, the direction and intensity of currents between refrigerating pieces and heating pieces are controlled through the PLC to achieve the indoor heating and heat dissipating, the indoor temperature is rapidly balanced, the PLC controls a humidifier to spray mist or an air exhaust fan to suck air so as to adjust the humidity in the greenhouse, and the humidity balancing is achieved.

Description

technical field [0001] The invention relates to a greenhouse with temperature and humidity self-control, in particular to a PLC-controlled intelligent temperature-control greenhouse. Background technique [0002] With the emergence of high molecular polymers - polyvinyl chloride and polyethylene, plastic films are widely used in agriculture. In the early 1950s, Japan, European and American countries successfully applied greenhouse films to cover hotbeds, and then covered small sheds and greenhouses with good results. my country introduced polyvinyl chloride agricultural film in the autumn of 1955. It was first used to cover vegetables in small sheds in Beijing, and achieved the effect of early maturity and increased production. The greenhouse was originally a special equipment for vegetable production. With the development of production, the application of greenhouses has become more and more extensive. At present, greenhouses have been used for potted flower and cut flowe...

AI Technical Summary

Problems solved by technology

[0004] The greenhouse scaffolding in the prior art either adopts a steel frame or a bamboo frame. For the test greenhouse with high temperature and humidity control requirements, the single structure of the steel frame and the bamboo frame can no longer meet the demand. At the same time, the greenhouse film in the prior art Both are single-layer or double-layer polyolefin films, which have good thermal insulation properties, but for greenhouses with high temperature control requirements, a single polyolefin film cannot play a constant temperature role

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