4℃ blood bank refrigerators are specifically designed to store blood products at a precise temperature of 4°C, which is essential for maintaining the viability and safety of blood components. These refrigerators feature advanced temperature control systems, alarms for temperature deviations, and energy-efficient designs. They are equipped with interior shelves and drawers for organized storage and are often used in hospitals, blood banks, and research laboratories.

Safety

• Safety door lock and controller sting password to prevent unauthorized access.
• Build-in back-up battery to display temperature and to operate audible and visual alarm system for up to 72 hours without AC power.
• Inner doors and auto on/off the cooling fan to prevent cold air from leaking out when the door is opening when a controller or two sensors failed.
• Visual and audible alarm system: High/low temperature, power failure, sensor error, door ajar, low battery.
• Power failure protection: turn-on delay of the cooling system after power failure.
• Controller error protection: the cooling system will remember the normal working cycle and keep working depending on this memory when a controller or two sensors failed.
• Temperature printer: print current inside temperature automatically per 10 minutes.

Humanized Design

• 4 casters, and 2 casters with stopper for easy moving and fixation.
• 12 adjustable shelves and 36 blood baskets for easy use.
• Special designed service-free drainage system ensures no water in the cabinet.
• Standard 25mm test hole for easy connecting to temperature monitoring systems.
• Automatic on/off LED light with manual switch on the control panel.

Golden Rules for 4°C Blood Storage

Precision Temperature Management

1. Dual Monitoring: Use an NIST-certified thermometer (error < ±0.5°C) alongside built-in sensors, with data logged at ≤15-minute intervals (compliant with AABB standards).
2. Alarm Thresholds: Set high-temperature alerts (>6°C) and low-temperature alerts (<1°C) to prevent RBC hemolysis or plasma freezing.

Blood Layering Strategy

1. Upper Shelves: Whole blood and red cell suspensions (minimize door-opening disruptions).
2. Middle Shelves: Fresh frozen plasma (label thaw dates to avoid refreezing).
3. Lower Shelves: Backup ice packs or isolation trays (prevent blood bags from contacting condensation).
4. Prohibit Mixed Storage: Separate blood from vaccines/ reagents to avoid cross-contamination!

Door Opening Control

1. Single door opening ≤30 seconds; total daily access time <10 minutes (temperature recovery ≤2°C).
2. Pre-plan retrieval lists for bulk operations to minimize repeated access.

Why is 4°C the “Gold Standard” for Blood Preservation?

1. Red Cell Viability: 

4°C slows metabolism, extending shelf life to 42 days (temperatures >6°C accelerate ATP depletion, causing hemolysis).

2. Bacterial Suppression:

Below 4°C risks RBC membrane damage.

Above 4°C promotes bacterial growth (e.g., platelets require separate 22°C storage).

3. Regulatory Basis:

FDA 21 CFR 606: Mandates documentation and safety assessment for temperature deviations.

AABB Standards: Allow ±2°C fluctuations but recommend tighter control (±1°C).

Blood Bank Refrigerator Display

Other Refrigerator & Freezer