Cooling device with fan and wet curtain and control method thereof

Abstract

The invention discloses a cooling device with a fan and a wet curtain and a control method thereof. The device comprises a water pump, a wet curtain, a water supply pipe, a sprayer, a water recycling pond, a vent fan, a side window, a controller, a temperature sensor, a humidity sensor and an illuminance sensor, wherein one side of a greenhouse of the device is provided with the fan, the other side of the greenhouse is provided with the horizontally arranged wet curtain, and the wet curtain is provided with water through the water pump and the sprayer; since an included angle is formed by the wet curtain and the vertical surface of the device, the sun-shielding effect of the wet curtain on the wet curtain side in the greenhouse is reduced, and the effective utilization area of the greenhouse is improved; since the wet curtain is provided with water through the sprayer in an atomized mode, the threshold of the outer air humidity is improved when the wet curtain achieves the cooling effect because the wet curtain needs absorbing heat for gasification, and the cooling performance and efficiency of the wet curtain cooling device is improved; since the control method adopts fore-feedback type control, the precision of the temperature control and the cooling efficiency of energy are improved. The device can be widely used in the greenhouse which requires high environment control precision, high illuminance conditions and a good cooling effect.

Description

technical field [0001] The invention relates to the technical field of greenhouse cooling, in particular to a fan wet curtain cooling device and a control method. Background technique [0002] At present, in the design of the fan wet curtain cooling device, the wet curtain is installed vertically. In order to obtain a good cooling effect, the wet curtain is designed with a large area and a height of 1-1.5 meters, which blocks the sunlight from entering the greenhouse. The lighting on the side of the wet curtain in the greenhouse is affected, and the growth of plants within 4 meters from the side of the wet curtain in the greenhouse is seriously affected due to insufficient light. At present, in the control of the wet curtain, it is only opened or stopped according to the outdoor humidity or the indoor temperature, without considering the actual cooling effect; in the control of the fan, it is generally only a simple start and stop control based on the indoor and outdoor temp...

AI Technical Summary

Problems solved by technology

[0002] At present, in the design of the fan wet curtain cooling device, the wet curtain is installed vertically. In order to obtain a good cooling effect, the wet curtain is designed with a large area and a height of 1-1.5 meters, which blocks the sunlight from entering the greenhouse. The lighting on the side of the wet curtain in the greenhouse is affected, so that the growth of plants within 4 meters from the side of the wet curtain in the greenhouse is seriously affected due to insufficient light

At present, in the control of the wet curtain, it is only opened or stopped according to the outdoor humidity or the indoor temperature, without considering the actual cooling effect; in the control of the fan, it is generally only a simple start and stop control based on the indoor and outdoor temperature , can not obtain the appropriate cooling ventilation

The current wet curtain fan control method has low energy cooling efficiency, and causes repeated rises and falls of indoor temperature, sudden start and stop of air flow, which makes the environment in the greenhouse less stable and affects the operation and operation of the equipment. Growth of plants in the greenhouse

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