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Hitachi Original Advanced Vacuum Compartment

This revolutionary Made In Japan refrigerator comes with a Fresh Cassette with Wasabi Essence that maximises efficiency in odour deodorisation and food preservation. And with an additional LED Light that boosts Photocatalyst Preservation*1 in the Vacuum Compartment, carbon dioxide generation is increased by 3 times which means that food stays fresh for longer and essential nutrients are retained.

Freseh cassette

Vacuum Preservation In Vacuum Compartment

The uniquely designed Vacuum Preservation can achieve approximately 0.8 atm capability through the use of a vacuum pump to extract air from the compartment. This function reduces the action of enzymes in their surroundings and suppresses the oxidation thus ensuring the freshness in food while retaining food nutrients. Furthermore, moisture that is trapped in the compartment prevents dryness in food.

Small Vacuum pump


*1 Photocatalyst Preservation refers to an action of enzymes in fish, meat and vegetables. It delays the loss of freshness by suppressing vegetable breathing and controls the action of enzyme that resolves proteins (inhibiting the action of oxygen on the surface of fish and meat).

Photocatalyst Preservation In Vacuum Compartment

Photocatalyst Preservation is now enhanced with 3 LED Lights that has a greater effect when it comes to the generation of carbon dioxide. The LED Lights generate 3 times more carbon dioxide*2 to control the atmosphere in which fish, meat, fruits and vegetables are kept to enable successful deodorisation and suppression of microbes growth. Together with the powerful Deodorant by Photocatalyst Preservation, 6 kinds of odours are effectively dissolved and food keep its natural good taste.

photocatalyst-preservation-in-vacuum-compartment

High Speed Defrost With Aluminum Tray

An Aluminum Tray of high heat conductivity is placed at the bottom of the case. It controls and prevents dripping from meat and defrosts the meat efficiently at a higher speed without affecting the taste.

High Speed Defrost With  Aluminum Tray


*2 Carbon Dioxide is a useful component in Preservation Technology. It delays the loss of freshness by suppressing vegetable breathing and controls the action of an enzyme that resolves proteins (inhibiting the action of oxygen on the surface of fish and meat).

Optimum Temperature In Vacuum Compartment

The Vacuum Compartment with an Optimum Temperature setting of approximately -1°C/+1°C can be adjusted to suit the type of food and amount of CO2 present in the fridge. Together with the Sub-zero Mode and Chiller Mode in the Vacuum Compartment, food items can be stored for longer without freezing. This ensures that the food items will not lose its original taste and texture.

Freshness retention

*3K value indicates the degree of freshness. The lower the value, the fresher the food. Generally any values above 60% are not suitable for consumption.
*4Inosinic Acid is one of the components that preserves good taste and is found in sliced bonito.
*5Measurement and test method by Hitachi: A force is exerted on top of the salmon from a distance of 5mm away using a tooth-mark rod.
*6Vegetables cannot be preserved, as they will freeze. The test data is based on test conducted by Hitachi in a room temperature of 20ºC. Items in the compartment are wrapped with PVC wrapping which allows permeation of moisture and gas. It does not affect the effectiveness of Vacuum Preservation and Photocatalyst Preservation. The level of effectiveness differs according to the types of food and its degree of freshness. It does not extend the foods’ shelf life or guarantee the preservation period indicated.

Convenient Storage In Vacuum Chiller Compartment

Food items can be kept in its original state without losing their freshness, taste and nutrient levels. The Vacuum Chiller Compartment with its air-tight structure preserves and curbs the dryness in food whilst reducing the odourous components*7 of food stored. Food that has been opened does not need to be wrapped for storage and this saves the hassle of wrapping*8.

Convenient Storage In Vacuum Chiller Compartment

Seasoning Absorb Faster Into Food

The vacuum function in the Vacuum Compartment removes air from food which allows food seasoning to absorb at a faster rate*9 so that lesser time is required for food preparation.Seasoning Absorb

*7 Odourous components: Methyl Mercaptan (odours of onion and garlic), Trimethylamine (odours of raw food), Hexanal (odours of meat), Acetaldehyde (fermentation odours of miso and soy sauce), Propanel (odours of grilled fish) and Acetic Acid (odours of vinegared food).
*8 It is recommended that food with high odorosity be wrapped up.
*9 After soaking a 5mm thick radish in 10% brine solution#1, the time taken for the radish in brine concentration to reach 1.3% compared between Refrigerator Compartment (Atmospheric Pressure) and Vacuum Chiller Compartment. Refrigerator Compartment: 240 minutes, Vacuum Chiller Compartment: 108 minutes. The permeation speed varies according to ingredients and seasoning liquid. Now, complicated menus can be served quickly. (#1 The solution has been dyed red for easy visualisation.)

Energy Saving Technology

Following Hitachi’s continual efforts in pioneering green initiatives, this fridge has an array of the latest technological advantages that thrives towards a sustainable environment. With the introduction of a Dual Fan Cooling System, the cooling process is much faster. Together with the Advanced Frost Recycling Cooling, high-efficiency Compressor and Insulation system, this refrigerator is able to run effectively with greatly reduced electricity consumption.

Annual Energy Consumption Chart

convenient-storage-in-vacuum-chiller-compartment

* kWh energy consumption comparison between the 7 models. The figures vary according to the temperature settings in different compartments, its surrounding temperature and humidity, frequency of doors opening and closing, amount and temperature of food newly added into the fridge and the method of usage.
** Figures extracted from NEA website.
# Litres based on Gross Capacity.

Dual Fan Cooling System

The Refrigerator and Freezer Compartment are able to chill independently with the flaps and new Dual Fan Cooling System. The original cooling fan in the Freezer Compartment is designed to effectively cool the whole refrigerator system. However, as the Refrigerator Compartment is opened and closed more frequently, warm air tends to penetrate easily. Now, the Refrigerator Compartment comes with an additional fan that chills the compartment faster to reduce wasted energy consumption.

Dual Fan Cooling System

Hitachi Original Advanced Flexible Vacuum Insulation Panel (VIP)

Hitachi Original Advanced Flexible  Vacuum Insulation Panel (VIP)
An Advanced Flexible VIP with powerful insulation increases its surface coverage of Fluid-urethane by using a 3D reinforced double bag for enhanced cooling efficiency. The insulation layer are specially moulded to fit the inner wall structure, thus taking up less space that can otherwise be utilised for storage functions.

Advanced Frost Recycling Cooling Technology

In conventional cooling systems, frost formed on the evaporator would simply be melted and discarded. With Hitachi’s Advanced Frost Recycling Cooling, the cool air generated by the frost is recycled by sending it through the Refrigerator and Vegetable Compartments to cool the compartments even when the Compressor is not running. Through this function, power consumption is reduced*10.       

Advanced Frost Recycling Cooling  Technology

Inverter, Intelligent Flaps and CFC-FREE

Inverter

Inverter

A highly efficient Inverter-controlled Compressor ensure operation in both low and high speed operations.

Intelligent Flaps and Sensors

The Intelligent Flats and Sensors in the Refrigerator, Freezer and Vegetable Compartments detect temperature atmosphere on the upper and middle shelves separately based on the food items stored to achieve an ideal cooling atmosphere at all times.

Inverter 2

CFC-FREE Urethane / CFC-FREE Refrigerant

Most of the insulation materials used by Hitachi are CFC-free. Hitachi also uses a CFC-free refrigerator (R600a) that has less impact on global warming as compared to Chlorofluorocarbon


 


*10  When in a room temperature of 15ºC, the power efficiency is about 8%, and in a room temperature of 30ºC, the power efficiency #2 is about 5%. (#2 Comparisons are carried out with the temperature settings set to “medium” without opening or closing of door. The power efficiency changes according to different usage and conditions. When the temperature setting is set to “minimum”, power efficiency cannot be obtained.)

Convenient Eco Intelligent Control

With Hitachi’s Eco Intelligent Control, which gives you a choice of energy-saving modes most suitable for your lifestyle, you can now save on electricity bills with less energy wastage. The new Travel Mode will also put your mind at ease when the whole family travels overseas for long periods of time. In addition to the Energy Saving Mode, Dual Fan and Frost Recycling Cooling, this refrigerator has reached an unprecedented level of eco capability.

Convenient Eco Intelligent Control

Travel Mode and Energy Saving Mode

Introducing the Travel Mode that balances cooling power with usage frequency to prevent over-cooling when the fridge has not been opened or closed over a long period, thus greatly reducing power consumption*11. In conjunction, Energy Saving Mode also minimises electricity usage when turned “On”, by decreasing cooling power till it switches "Off" when the fridge is not in used over a long period.

Power Saving Mode

Power Saving Mode
As each compartment cools individually, it reduces the energy wastage of powering the entire fridge just to cool one compartment. When Power Saving Mode is activated, an alarm will sound when the door is left opened for more than 30 seconds, after which the LED Lights will dim. As such, the cooling speed will decrease to minimise the revolution of the Compressor and power efficiency*12 is achieved.
Power Saving
ecoSign is turned “on” when the Compressor runs in a stable condition. When there are less door movements, the refrigerator will defrost automatically.


*11 When in a room temperature of 15ºC, the power efficiency is about 8%, and in a room temperature of 30ºC, the power efficiency #3 is about 5%. (#3 Comparisons are carried out with the temperature settings set to “medium” without opening or closing of door. The power efficiency changes according to different usage and conditions. When the temperature setting is set to “minimum”, power efficiency cannot be obtained. )

*12 In normal operation, the power saving efficiency of about 12% and 8% is achieved when the room temperature is 15ºC and 30ºC respectively.

Bigger Capacity Refrigerator With Easy Storage

This refrigerator comes with a flexible storage capacity of approximately 722-litres*13. The newly designed one-piece Tempered Top-Glass Shelf increased storage capacity in the Refrigerator Compartment to approximately 363-litres*13. With more space*14 you can easily store larger items and more food neatly. The thicker shelves can also bear much heavier loads than before.Bigger Capacity Refrigerator With Easy Storage*13  Only for models R-D6800XS and R-D6800S (ISO Gross Capacity).
*14  Comparison between Hitachi models R-C6800S and R-D6800S.

Perfect Moisture Vegetable Compartment

The Vegetable Compartment of approximately 126-litres capacity*15 which is equivalent to 4.1 shopping baskets*16 has upper and lower layers that are perfect for storing the vegetables easily and neatly within. By using the Flap for separate chilling during Frost Recycling Cooling, moist cool air from the frost are sent to the compartment, enabling vegetables to retain its original moisture level and suppress dryness even after a long storage period. The Temperature Sensor detects and controls the temperature to maintain the ideal atmosphere.

Perfect Moisture Vegetable Compartment
*15  Only for models R-D6800XS and R-D6800S (ISO Gross Capacity).
*16  Each shopping basket capacity is approximately 22-litres nett.
*17  Store plastic bottles with a maximum height of 310mm.
*18  Based on tests conducted by Hitachi. After 7 days storage without wrapping at an ambient temperature of 20ºC outside the refrigerator without opening or closing the doors. The number of days of storage and degree of freshness vary depending on the type of vegetables and condition of items before they were stored in the refrigerator.
*19  Comparison between Hitachi models R-D6800S and R-Z6200.

Freezer Compartment

With a large capacity of approximately 206-litres*20 which is equivalent to 5 shopping baskets*21, storage of large items is so much easier. All your items can also be stored neatly and retrieved easily.

Freezer Compartment
Freezer Compartment

3-Layer Freezer Case

Storing and retrieving items is now easier with the 3-Layer Freezer Case. Designed with Glass Fibre Plastic with lesser “rib” increased the storage space*22, which means the Freezer Case can now accommodate up to approximately 5 shopping baskets*21. It even allows beverage bottles to be stored in an upright position with extended storage height of about 23.5cm in the bottom tray.

*20 Only for models R-D6800XS and R-D6800S (ISO Gross Capacity).
*21 Each shopping basket capacity is approximately 22-litres nett. Freezer Compartment nett capacity excludes Ice Compartment.
*22 Comparison between Hitachi models R-B6800S and R-D6800S.

Quick and Powerful Freezing

During Quick Freezing cool air is generated in the compartment to chill the atmosphere at high speed. Together with the Aluminium Tray, food placed on it chills faster due to the fast conductivity nature of the material. You can even place hot steamed rice directly into the compartment.

Quick and Powerful Freezing
Quick and Powerful Freezing
Quick and Powerful Freezing

Low Temperature Freezing

Preservation at low temperature through normal freezing by setting the Freezer Compartment temperature to maximum

Automatic Ice-Maker Compartment

Ice cubes can be made automatically simply by filling up the water tank in the Ice-Maker Compartment. To ensure cleanliness of the ice cubes, the water tank is enhanced with a filter that traps suspended particles that are present in the water. The Ice-Making tray can also be easily removed for washing. And with Quick Ice-Making, it takes just 70 minutes for ice cubes to form as compared to 120 minutes with conventional Ice-Making.       

Automatic Ice-Maker Compartment


*23  Compared to normal freezing operation, the power consumption level is 20% higher, based on tests conducted by Hitachi.
*24  Please use water with a hardness level of 100 or less. When using mineral water, you can see white suspended particles mixed inside the ice cubes. These white suspended particles are indication of the mineral components of mineral water and is safe for consumption.

Other Features

Touch Control Panel

The digital display touch control panel is superbly crafted for friendly usage.

Other Features

Tempered Glass Surface

Made of tempered glass finishes, the ultra-glossy doors are scratch-proof and easy to clean.

Other Features

Hitachi's Original Auto Door*25

The automatic drawers slide out effortlessly with a touch of a button even when it is full and heavy.

Other Features

Triple Power Deodorisation

This refrigerator comes empowered with a Triple Deodorant Filter that can catch and dissolve more germs and odours in the atmosphere. Combining the properties of Activated Carbon, Zeolite and Manganese Oxide (Catalyst), the percentage of odours present is reduced tremendously over time*26.

Other Features


 
*25  Only for models R-D6800XS, R-D6800S & R-D6200S.
*26  Odourous components can be reduced in the Vacuum Chiller Compartment by Photocatalyst. Eg. Odourous components: Methyl Mercaptan (odours of onion and garlic), Trimethylamine (odours of raw food), Hexanal (odours of meat), Acetaldehyde (fermentation odours of miso and soy sauce), Propanel (odours of grilled fish) and Acetic Acid (odours of vinegared food). It is recommended that food with high odorosity be wrapped in wrapper.
© Hitachi, Ltd. 1994, . All rights reserved.