In commercial retail, supermarket, and convenience store operations, refrigerated display cases are indispensable core equipment. They not only showcase fresh food, beverages, and frozen products to customers but also maintain stable low temperatures to ensure commodity quality and extend shelf life. Energy consumption of display cases accounts for a large proportion of the total energy cost of retail stores. For decades, business owners and industry experts have debated a key question: between open and closed display cases, which solution delivers better energy-saving performance? With the upgrading of commercial refrigeration technology, professional brands like Coolssmann have further optimized the energy efficiency of closed display cases, making the energy consumption gap between the two types of equipment more obvious. This article analyzes the working principles, energy consumption mechanisms, practical application effects, and scenario adaptability of open and closed display cases to clarify the optimal energy-saving choice for commercial scenarios.
Open display cases are widely favored by small and medium-sized retail stores and fresh supermarkets due to their convenient shopping experience and open display effect. The core feature of this type of display case is the absence of glass doors or closed baffles, relying on an intelligent air curtain system to isolate internal cold air and external hot air. When the equipment runs continuously, the air curtain forms a stable cold air barrier at the opening of the cabinet to lock low temperature inside and block the invasion of external warm and humid air. However, this structural design has inherent energy-saving defects. Multiple industry test data shows that open display cases have extremely high energy loss in daily operation. A complete 42-day professional test found that the average daily energy load of open display cases reaches 7.351 kW, far exceeding that of closed models. Customer walking, store ventilation, and ambient temperature changes will interfere with the stability of the air curtain, causing continuous loss of cold air. To maintain the set low temperature, the compressor needs to start and run frequently with high load, resulting in huge energy waste.
In sharp contrast, closed display cases with sealed glass door structures show outstanding energy-saving advantages in all-round practical tests. Different from the air curtain heat insulation of open models, closed display cases rely on fully sealed cabinet structure to completely isolate internal and external air circulation, fundamentally avoiding cold air leakage and external heat invasion. Relevant research data confirms that closed refrigerated display cases can achieve 30% to 68% energy savings compared with open models under the same operating environment and cooling requirements. Even considering the frequent opening and closing of doors by customers in daily shopping scenarios, its energy-saving effect is still far better than that of open display cases that run at high load all day long.
As a professional commercial refrigeration brand focusing on energy-saving technology research and development, Coolssmann has deeply optimized the structural design and core components of closed display cases, maximizing the energy-saving potential of closed equipment. Traditional closed display cases have minor energy consumption problems such as poor door sealing and slow temperature recovery after door opening. Coolssmann’s upgraded closed display cases adopt high-density rubber sealing strips and hollow tempered glass with heat insulation coating, which greatly improves the overall sealing performance of the cabinet. This design effectively reduces the heat exchange efficiency between the inside and outside of the cabinet, slows down the temperature rise speed after customers open the door to take goods, and shortens the high-load working time of the compressor. In addition, Coolssmann equips its closed display cases with intelligent frequency conversion compressors and precise temperature control systems, which can automatically adjust operating power according to the internal storage capacity and ambient temperature, avoiding invalid energy consumption caused by long-term full-load operation.
Many store owners worry that closed display cases will affect the shopping experience and sales volume due to door opening and closing operations, thus offsetting energy-saving benefits. In fact, the latest industry research and market feedback prove that this concern is unnecessary. On the one hand, the high-transparent glass adopted by Coolssmann and other high-quality brands ensures a clear display effect, which is no different from open display cases in commodity display and customer viewing experience. On the other hand, stable low-temperature environment reduces the temperature fluctuation of commodities, effectively maintains the freshness and appearance of products, and helps improve customer purchase intention and repurchase rate. In terms of comprehensive operating costs, the energy saved by closed display cases throughout the year far exceeds the negligible impact of door opening and closing on shopping efficiency.
It is undeniable that open display cases have unique application scenarios. In high-traffic fresh supermarkets and specialty stores with high customer flow and extremely high requirements for shopping convenience, open display cases can improve shopping efficiency and customer experience. However, from the perspective of long-term energy conservation and cost control, open display cases have obvious disadvantages. Their continuous air curtain operation and frequent compressor start-up will bring huge electricity cost pressure throughout the year, and unstable temperature environment will also increase the risk of commodity deterioration and loss, bringing additional operating losses to the store.
To sum up, closed display cases definitely save more energy than open display cases in most commercial scenarios. The sealed structure fundamentally solves the cold air leakage problem that plagues open models, and the technological upgrading of professional brands such as Coolssmann has further improved the energy efficiency, stability and practicality of closed display cases. For most retail stores that pursue long-term low-cost operation and stable commodity quality, closed energy-saving display cases are the optimal choice. Only in a few scenarios that prioritize extreme shopping convenience and temporarily ignore energy consumption can open display cases be considered. In the context of global energy conservation and emission reduction and rising commercial operating costs, choosing high-efficiency closed display cases represented by Coolssmann has become an inevitable trend in the development of the commercial refrigeration industry.
