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In modern agricultural production, edible mushrooms, especially shiitake mushrooms, have become highly sought-after high-value agricultural products in the market. However, the production of edible mushrooms is very sensitive to environmental conditions, especially the control of temperature, humidity and carbon dioxide concentration, which is directly related to their yield and quality. In order to achieve stable production in all seasons, agro-technology enterprises have gradually started to adopt more refined and intelligent temperature control solutions. In this paper, we will analyze how to provide an ideal growing environment for shiitake mushrooms through inverter thermostatic heat pump units and solve the pain points of traditional temperature control systems.
Shiitake mushrooms have very specific environmental needs. The ideal fruiting temperature for Shiitake mushrooms should be strictly controlled between 18-22°C, with a day-night temperature variation of no more than 2°C. Temperature fluctuations beyond this range can cause uneven growth of mushroom buds, affecting both yield and quality, and may even lead to diseases. In addition, humidity control is crucial, with the required humidity level between 85%-95%. If the temperature control system disrupts the humidity too much, it will affect the growth of the mushrooms.
Traditional temperature control solutions, such as a combination of air conditioners and boilers, while capable of controlling temperature, have several significant drawbacks:
High Energy Consumption and Cost: Ordinary air conditioners have poor cooling performance during summer, with a COP value of only 2.5-3.5. During winter, the boiler's heating efficiency is low, and fuel costs are high, leading to poor overall energy efficiency. Electricity and fuel costs make up a large proportion of operational expenses.
Temperature and Humidity Fluctuations, Inconsistent Quality: Air conditioners excessively dehumidify when cooling, leading to a rapid decrease in humidity; while heating, they dry the air. The frequent start-stop cycles cause temperature fluctuations that often exceed ±2°C, resulting in problems like thin-shelled mushrooms, deformed mushrooms, and yellow mushrooms, which lowers the percentage of top-grade mushrooms.
Low Temperature Control Precision, Uneven Fruiting: Traditional systems have slow responses and cannot maintain precise, stable temperatures. This leads to uneven bud development, resulting in unstable batch yields and quality.
Winter Operation Risks: Boilers have safety risks and require dedicated staff to monitor, increasing management costs and risks.
A certain agricultural technology company in Jiangsu, China, with dozens of standardized mushroom growing rooms, faced the challenges described above. Their core demands included:
Precise Constant Temperature: Stable temperature control within ±0.5°C to meet the optimal growth requirements of Shiitake mushrooms (18-22°C).
Energy Efficiency: Significantly reduce energy consumption in the temperature control process, improving overall economic efficiency.
Humidity Coordination: Minimize the impact on humidity control during the temperature regulation process, maintaining humidity levels between 85%-95%.
Safety and Stability: Ensure reliable operation, with high automation to reduce manual intervention and eliminate safety hazards.
Intelligent Management: Support remote monitoring and data recording for precise production management.
To address the client’s needs and pain points, KAYDELI tailored and deployed multiple variable frequency heat pump units specifically designed for edible fungus cultivation. The core advantages of this solution are as follows:
KAYDELI’s variable frequency heat pump units use advanced frequency conversion technology, which adjusts the compressor output and electronic expansion valve opening in real-time according to the heat load of the growing room. This enables rapid response to temperature changes and ensures precise temperature control within the ±0.5°C range. This effectively prevents temperature stress and improves the consistency of mushroom quality and yield.
The units make full use of air heat, with a COP value of up to 3.8 in winter, far exceeding the efficiency of electric boilers or coal-fired boilers. In summer, the high-efficiency compressors and optimized heat exchange design achieve a COP value of 4.2 or higher. In actual tests, the overall energy savings rate compared to traditional solutions is about 40%, effectively reducing energy costs.
The system is fully electric-driven, with no combustion or emissions, meeting green production requirements. It includes multiple protection mechanisms (such as high/low pressure, overcurrent, and anti-freeze protections) to ensure the stable and long-term operation of the equipment.
The system is equipped with an advanced control system, allowing staff to remotely control temperature, humidity, CO₂ concentration, and light intensity. This enables precise environmental regulation within the growing room, ensuring the most suitable conditions for Shiitake mushrooms. This solution breaks the limitations of relying on external factors like weather, overcoming seasonal, land, and labor constraints, ensuring 365-day continuous mushroom production.
With the application of KAYDELI’s variable frequency heat pump units, the agricultural technology company in Jiangsu was able to resolve the issues related to temperature control. Stable temperature control in the growing rooms ensured high-quality Shiitake mushrooms, while energy consumption was significantly reduced, and overall operating costs were cut down. Additionally, the intelligent management system improved production efficiency and provided detailed management data.
As technology continues to improve and upgrade, KAYDELI’s variable frequency heat pump units will play an increasingly important role in agricultural production. In the future, more mushroom growers will adopt this advanced technology to achieve year-round stable production, green production, and efficient management.
The application of variable frequency heat pump units in Shiitake mushroom cultivation solves the problems of high energy consumption, temperature and humidity fluctuations, and low control precision associated with traditional systems. This technology ensures year-round stable production, improves production efficiency and quality, reduces costs, and enhances sustainability. KAYDELI’s solutions not only meet the client's needs but also break the limitations of traditional agricultural production, providing broader opportunities for the future development of the mushroom industry.
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