Clinical laboratories rely on cold storage equipment to store patient specimens for extended periods of time. Dependable ultra-low freezers are essential for safeguarding their integrity. Therefore, quality and performance should be key characteristics at the foundation of how an ultra-low freezer is designed.
Protecting samples from unnecessary exposure to warmer temperatures is critical to ultra-low freezer performance. When developing i.Series® Ultra-Low Freezers, Helmer Scientific recognized the importance of keeping heat out. The Heat Barrier System™ was developed to provide multiple levels of heat containment.
The Heat Barrier System™ combines specially designed components that work together to prevent the intrusion of warmer air and moisture. These design elements include the outer door, the door frame and cabinet, and the inner doors.
Outer Door
The outer door is robust with three heavy-duty adjustable hinges. Premium insulation is used in all outer doors. A specially designed single-handed door handle provides smooth operation for easy opening and secure closing to prevent door leaks.
Frame and Cabinet
An ice-resistant door frame maintains a better seal that improves temperature uniformity and minimizes interior frost formation. An energy efficient hot gas loop surrounds the frame, resulting in a virtually frost-free sealing surface. Advanced composite panels reduce the amount of heat transfer.
Inner Doors
One element that is particularly important to the performance of an ultra-low freezer is the design of the inner doors. It is typical for ultra-lows to have an inner door for each shelf within the unit, in addition to a heavy-duty outer door. This creates enclosed storage compartments inside the freezer. The inner doors should be designed to prevent warm air from entering the closed compartments and affecting the temperature of the samples inside. There are three important considerations for the design of the inner doors:
- Are they well insulated?
- Are they structurally rigid to prevent sagging?
- Do they utilize gaskets to seal the space around the inner doors?
The i.Series® line of ultra-low freezers features structurally reinforced, insulated inner doors that provide tight closure, minimizing change in compartment temperature during routine door openings. In addition, dual-blade gaskets prevent the intrusion of warm air, sealing out heat and moisture.
Learn more about how the Heat Barrier System™ helps protects your critical samples.
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Visit our website for more information on ultra-low temperature freezers designed for quality and performance.
