According to the end-user, the reason for choosing Shanghai Yicheng was their professional performance within the industry. The end-user was also deeply impressed by the high quality of the refrigeration units. Mushroom growth is very delicate. If the temperature is too high, then unwanted fungus will sprout and diminish its commercial value. Temperatures that are too low will suppress growth and lengthen the growth cycle. Excessively low humidity will cause edible fungus to shrink and bags to fall off, with low yields and deformities. Insufficient moisture inhibits growth, but too much moisture will cause rot and even death. An excessively high concentration of CO2 will inhibit the growth of the fruiting body. It is necessary to reduce the CO2 concentration by supplying fresh air through ventilation. But if it is too low, fruiting bodies will become loose and soft. Thus, high-performance, high-reliability equipment is the foundation for project success.
"Shanghai Yicheng chose Danfoss for the recognized superiority of the Danfoss refrigeration compressors and valve products”, says Mr. Liu Weidong, General Manager Shanghai Yicheng. Mushroom growing buildings constitute an environment that presents severe challenges to the reliability of compressors and valves. The system's evaporating temperature is not very low, but the temperature accuracy requirements are very high. Long-term operation and humidity control in an environment where lines and components easily corrode place very high expectations on all parts of the refrigeration system.
Danfoss scroll compressor MLM has been optimized for freezing and cooling conditions and offers below benefits:
• Highest efficiency in the industry: under EN12900 HBP condition, COP of MLM076 is at least 3% above other alternative scrolls and 8% above semi-hermetic.
• High reliability: very simple press-fit assembly technique contributes to 1/3 less components and half the hermetic welds of competitive scrolls, thus achieving less risk of compressor failure.
• Compact design: with hybrid scroll profile, the displacement of MLM076 increase by 13% without enlarging scroll set size.
• Less weight: MLM076 only weighs 45kg, 26% and 68% lighter than alternative scrolls and semi-hermetic respectively.
Danfoss’ valve parts have always been the best in the entire refrigeration and air-conditioning industry. Its expansion valves make use of stainless steel capillary tubing and temperature sensors which are to a certain extent corrosion resistant. Patent laser welding technology, unique double-diaphragm design, precise control curves, and perfect manufacturing processes—all of these ensure regulated flow results and system reliability.
Lucky king oyster mushrooms! With such professional care, they are sure to grow healthy! Li Zhiwei has already made an appointment with his hometown. The next time he comes to visit, he will definitely be carrying a large bamboo basket on his back in the expectation of becoming a modern-day “mushroom picker”! Let us continue to care for the oyster king mushroom refrigeration project of this customer.
Danfoss components selected for Shanghai Yicheng Refrigeration Equipment
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Mycelium culture period |
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Fruiting body growth period |
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Temperature |
Relative humidity% |
Co2 volume fraction% |
Temperature |
Relative humidity% |
Co2 volume fraction % |
King oyster mushrooms |
20-22 |
60-70 |
≤ 2.2 |
14-18 |
80-90 |
0.2 |
Enoki mushrooms |
18-20 |
60-70 |
≤0.2 |
8-12 |
80-90 |
0.06-0.2 |
Oyster mushrooms |
24-26 |
80 |
|
13-15 |
85-90 |
≤2.2 |
Lion's mane mushroom |
21-24 |
70-80 |
|
15-17 |
80-90 |
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Champignon mushroom |
22-24 |
60-65 |
≤1 |
13-16 |
80-90 |
≤2.2 |
Shiitake |
24-26 |
60-70 |
|
18-21 |
80-90 |
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