FUJI ELECTRIC JOURNAL Vol.88-No.3 (Sep/2015)

 
FUJI ELECTRIC JOURNAL Vol.88-No.3 (Sep/2015) Heating and Cooling Technology and Global Solutions for Food Distribution


Heating and Cooling Technology and Global Solutions for Food Distribution

[Purpose]

In the field of food distribution, there has been an increasing demand for vending machines with enhanced energy saving, transportation and storage equipment for delivering food safely and securely, store related equipment, and solutions that combine these machines and equipment with IT. Fuji Electric has been responding to these demands through its research and development efforts in related technologies based on the concepts of “high quality,” “diversification,” “environment” and “globalization” in order to expand into markets with products that meet the exact needs of its customers.
In this issue of Fuji Electric Review, we will introduce heating and cooling technology, which is indispensable for energy saving, products that utilize this technology, and unique products for the global market, as well as element technologies, such as product vending mechanisms and currency identification.

Heating and Cooling Technology and Global Solutions for Food Distribution: Current Status and Future Outlook
SUGIMOTO, Koji
The food distribution industry has been facing new requirements as a consequence of changes in various market factors. Fuji Electric has been responding to these requirements through its R&D efforts based on the four concepts of “high quality,”“diversification,” “environment” and “globalization.” The concepts of high quality and diversification have inspired the development of products such as an ultra-compact cup-type vending machine and a drink showcase equipped with inverter freezer. In response to environmental needs, we have developed products including a heat pump vending machine equipped with CO2 ejector refrigerating cycle and the zero-heating-power vending machine “Hybrid ZERO.” Furthermore, we have been advancing our global platform through the development of products such as currency identification devices for global markets and a can and bottle dispensing mechanism that utilizes a DC gear motor.
Heat Pump Vending Machine Equipped with CO2 Ejector Refrigerating Cycle
TSURUHA, Takeshi; YAMAGAMI, Yuhei; MATSUBARA, Takeshi
Fuji Electric has been utilizing CO2 refrigerants and hydrofluorocarbon refrigerants in the refrigeration units used in its beverage vending machines. However, compared with hydrofluorocarbon refrigerants, CO2 refrigerants have a higher operating pressure and thus require a larger amount of power to drive the compressor. To solve this issue, We have adopted an ejector to recover the lost energy by using the high operating pressure, developed a refrigeration unit that optimally control the ejector, and fitted it into our vending machines. Coefficient of performance (COP) improvement in the refrigeration unit has enabled the vending machine to reduce power consumption by 25% compared with conventional ones.
ZERO Heating Power Vending Machine “Hybrid ZERO”
ISHIDA, Shin
Fuji Electric has adopted the concept of achieving extensive energy savings while reducing peak power consumption to decrease environmental burdens, and based on this, it has developed the ZERO Heating Power Vending Machine “Hybrid ZERO,” which does not utilize an electric heater. Conventional models heated a part of the storehouse using an electric heater, the Hybrid ZERO, however, heats all heating chambers using a heat pump. We have achieved this functionality by increasing the efficiency of heat exchangers and compressors while newly developing a refrigerant channel switching valve. These enhancements enable the Hybrid ZERO to achieve a 15% reduction in yearly power consumption based on estimated actual usage in operation mode, as well as a maximum reduction of 55% in power consumption in winter operation mode.
Office-Use Ultra-Compact Cup-Type Vending Machine “FJX10”
KUROYANAGI, Yasuhiko; ITO, Shuichi; NISHIKAWA, Yohei
Fuji Electric has developed an office-use ultra-compact cup-type vending machine “FJX10” in collaboration with Japan Beverage Holdings Inc., a cup beverage operator. The unit has been designed to be installed in offices, being characterized by its compact size and low power consumption, allowing it to dispense delicious coffee within the premises of an office. Moreover, the unit utilizes a cup mixing system that achieves a superior level of sanitation and ease of cleaning by adopting the industry’s first horizontal uniaxial conveyance mechanism. Furthermore, it also achieves an industry top-class low power consumption of 849 kWh/y by means of equipping the unit with a highefficiency energy-saving ice maker, as well as an energy-saving hot water tank that adopts a vacuum heat insulating structure.
Cold Storage Container “Chilled Type D-BOX”
ONZUKA, Shojiro; ISHINO, Yuji; TOGASHI, Hajime
In recent years, there has been increasing awareness concerning the need for food safety and security, and as a result, the food distribution industry has become more strictly required to manage the temperature of food products throughout all of the stages of the supply chain. Fuji Electric has developed the cold storage container “Chilled type D-BOX” in its efforts to reduce the cost of distribution processes and completely meet the needs of managing the temperature of food products. The Chilled type D-BOX is capable of keeping food products in the chilling temperature range for 5 hours without a power supply, even in environments with an ambient temperature of 32 ℃ . Furthermore, it can freeze 4 refrigerants simultaneously in 3 hours.
Drink Showcase Equipped with Inverter Freezer
MURABAYASHI, Kenji; KAGEYAMA, Toshiyuki; CHOU, Ikou
In recent years, the impact of earthquake disaster has increased the demand for replacing products with more energy-saving alternatives. Meanwhile, convenience stores are also requiring open showcases that increase the product display area. Fuji Electric has developed an 8-shelf showcase that utilizes an inverter freezer and has a display area 1.57 times greater than previous products. The unit makes use of a new scroll compressor while also adopting a new cooling system that utilizes segmented airflow, thus enabling the unit to achieve optimal inverter control that saves energy and stabilizes temperatures inside the showcase. We have also developed a mechanism that uses the evaporation fan to implement forced evaporation of drain water with the aim of saving energy and reducing unit operation. The unit achieves a 67% reduction in power consumption per unit area.
Energy Saving Control System for Freezing-Refrigerating Warehouse
KATO, Hiroshi; SHIRAKI, Takashi
Freezing-refrigerating warehouses, which are designed for storing and sorting products in food distribution processes, are being required to be more energy efficient due to increasing electricity costs. Fuji Electric has developed an energy-saving control system for centrally controlled freezing-refrigerating warehouses that optimizes the operation of the freezing-refrigerating equipment inside warehouses while also making it possible to carry out effi cient operation control. It has been confi rmed that yearly power consumption in warehouses can be reduced by 12.3% through the adoption of enhancements such as optimized control of a unit cooler and pressure control of the low-pressure side of a refrigerator unit using a unique algorithm for responding to load conditions inside a warehouse.
Product Dispensing Mechanism for Vending Machines for Global Market
FUKUDA, Katsuhiko; IWAKO, Tsutomu; NAKAJIMA, Norio
The expansion and popularization of beverage vending machines in markets outside Japan has required stable power supply voltage that is not affected by different power supply voltages and unstable power conditions in some areas. To comply with the law and regulations without being affected by power conditions, Fuji Electric has adopted a low DC voltage power supply for the product-dispensing mechanism. It can supply sufficient drive energy at a low voltage by utilizing the configuration that combines a DC gear motor with a cam-linkage mechanism for the driving source used in the product-dispensing mechanism. Furthermore, we have greatly reduced the number of purchase issues that arise during product sales by developing sold-out detection structure compatible with various product shapes, as well as a malfunction detection function with detection switches.
IEC Standard Compliant Glass Front Vending Machine “Twistar”
SAKA, Mitsuhiro; MATSUMOTO, Masahiro; WATANABE, Tadao
To meet the needs for China and ASEAN region, where needs of vending machines are increasing in retail business, Fuji Electric should acquire international certifications and deal with diversity of sales products. In light of this, we have developed the IEC Standard Compliant Glass Front Vending Machine “Twistar.” This product utilizes an energy-saving panel housing structure suitable for overseas production and achieves simple control through the integration of the control board and software individually. Furthermore, Mounting 4 types of sales module mechanisms can sell all products by one vending machine. We have also developed a soft-handling mechanism for the conveyance elevator to prevent the deformation of products.
Currency Identification Device for Global Markets “FGC Series” and “FGB Series”
OIWA, Takeshi; TANAKA, Nobuyuki; YAMANE, Takuya
Fuji Electric has developed the “FGC Series” and “FGB Series” currency identification devices for global markets such as China and Association of Southeast Asian Nations (ASEAN) region. To speed up the commercialization of the devices according to the various kinds of size and design of currencies by modifying a portion of the components and software, we have implemented a common design, in which base components and configuration are standardized. Furthermore, we have met an identification performance to ensure reliability by equipping a coin handling device (coin mechanism) with a coin escrow function and new inspection algorithm that enhances the identification of material, as well as equipping a paper currency identification device (bill validator) with a line sensor and identification algorithm.
Cooling Technology for Global Vending Machine Installed in High-Temperature High-Humidity Environments
MURASE, Takao
We have been working on the development of a global vending machine capable of operating in environments with an ambient temperature of 40 °C and relative humidity of 75% in consideration of the maximum temperatures and humidity of major cities in China. Along with an increase of target ambient temperatures, we have developed an efficient operating control technology, as well as a heat insulating and cooling technology for efficiently cooling increased heat loads. With regard to the effect of frost formed on the evaporator under the environment of high temperatures and high humidity, we have focused on the evaporation temperature setting level from the result of the observation of the frost formation process, and by readjusting the setting, we have controlled the amount of frost formation. These measures have enabled the model to reduce a required cooling capability and shorten an initial cooling time even in high-temperature high-humidity environments.


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