Livestock and poultry house summer wet curtain cooling automatic control system and control method thereof

Abstract

The invention relates to the technical field of cooling devices, in particular to a livestock and poultry house summer wet curtain cooling automatic control system and a control method of the livestock and poultry house summer wet curtain cooling automatic control system. By means of the livestock and poultry house summer wet curtain cooling automatic control system and the control method of the livestock and poultry house summer wet curtain cooling automatic control system, a wet curtain draught fan cooling system is made to automatically control the temperature inside a livestock and poultry house. When an existing cooling system of the livestock and poultry house is refitted, a user only needs to add or change positions of sensors and adjust the control system, the body structure of the livestock and poultry house does not need to be refitted, and therefore refitting cost is low, and generalizability is high.

Description

technical field [0001] The invention relates to the technical field of cooling equipment, in particular to an automatic control system and a control method for cooling a wet curtain in livestock and poultry houses in summer. Background technique [0002] The general high temperature in summer in my country, especially the continuous high temperature and high humidity in the south of the Yangtze River, has a great impact on my country's house breeding industry. The high temperature in the house can cause heat stress to animals, which will change various physiological and biochemical reactions of animals, which will lead to serious problems such as decreased feed intake, decreased production performance, and decreased disease resistance of livestock and poultry. Events leading to mass deaths of livestock and poultry have also been reported from time to time. Excessive humidity in the house can exacerbate heat stress in animals. How to overcome the troubles caused by high tem...

AI Technical Summary

Problems solved by technology

This simple "on-off" control method has the following problems: ① When this control method is used, the water pump will not stop once it is started, the wet curtain paper will be completely wetted quickly, and the temperature in the house will drop rapidly

Studies have shown that this sudden drop in temperature has adverse effects on the health of livestock and poultry, especially livestock and poultry near the wet curtain are prone to respiratory diseases such as colds

②The manual opening or closing of the wet curtain is generally judged by the manager based on his own feeling or experience. Human feeling is different from that of animals, and there are great differences between different people's feelings. Therefore, this kind of control The way has a lot of sensory and randomness, it is difficult to provide a relatively stable and comfortable environment for animals

③The water curtain system using timer switch has a certain degree of automation compared with the artificially opened or closed water curtain system, but the temperature changes every day. When the weather is hot, it may cause the water curtain to open The house is still at a higher temperature before or after closing, putting the animals in a more severe heat stress state

④Using this "on-off" controlled wet curtain cooling system, during operation, the water pump is always on, continuously supplying water to the wet curtain paper, which will cause high humidity in the house

When the weather is sultry, the humidity in the house is unfavorable. For example, the animals dissipate heat through the evaporation of water vapor in the skin or respiratory tract, which will aggravate the heat stress of the animals and have adverse effects on the animals.

⑤Using this "on-off" controlled wet curtain cooling system, once the cooling system is started, the cooling degree will not be controlled by humans, but will be determined by the wet bulb temperature of the air on the day and the cooling efficiency of the wet curtain cooling system. Therefore, it cannot It is adjusted according to the desired temperature of the animal's growth, so it is difficult to achieve fine control of the environment

⑥In this way, it is difficult to realize the automation and real-time control of the environment

③The number of fans to be turned on in different temperature ranges and time periods needs to be set by the production manager. A small number of fans will lead to high temperatures in the house or a large temperature difference between the head and the tail. If too many fans are turned on, it will not only cause waste of power , It will also cause the wind speed passing through the cooling pad paper to be too high, and the air and the water on the cooling pad paper cannot perform sufficient heat exchange, which will affect the cooling effect of the cooling pad cooling system

④ This control system uses the average temperature in the house as the target temperature for cooling. This temperature regulation method will inevitably cause some animals to be in a state of heat stress

⑤ When using this control method, the position of the sensor should have a significant impact on the operation of the system. For example, if the sensor position is set unreasonably, the temperature and humidity collected by it cannot represent the actual average temperature in the house, which will affect The operation effect of the whole system

In addition, there is a big difference in climate between the north and the south of my country, and the personnel engaged in related work are relatively lacking in environmental control technology and knowledge. The breeding environment control technology has become a major bottleneck restricting the large-scale livestock and poultry breeding in my country.

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