Convection based temperature assured packaging system
A packaging system for a temperature sensitive payload is provided. The system includes side panels and end panels forming a product compartment. Cooling layers within the product compartment are located below and above the products. Channel members located between the side panels and the payload and between the end panels and the payload create vertical channels having rectangular cross sectional areas for convective air movement.
1. A packaging system for shipping a temperature sensitive payload, the packaging system comprising:
a housing comprising a bottom panel, a top panel located above and in spaced vertical alignment with the bottom panel, side panels extending vertically between the bottom panel and the top panel, and end panels extending vertically between the bottom panel and the top panel, the housing defining a product compartment for holding the payload; and
a plurality of channel members located within the product compartment and affixed to at least two of the side panels or end panels, each channel member comprising a channel member housing, the channel member housing comprising a planar inner facing panel and a planar outer facing panel adjacent one of the side panels or end panels and connected to the inner facing panel by planar channel side panels, each channel member further comprising one or more internal panels arranged in a rectilinear configuration and disposed within the channel member housing, wherein
the channel member housing has an open top end and an open bottom end spaced apart from the housing top panel and housing bottom panel; and
the channel member housing and the internal panels define a series of adjacent, laterally spaced outer channels having a rectangular cross sectional area and a series of adjacent, laterally spaced inner channels located on a side of the outer channels away from the housing and having a rectangular cross sectional area.
2. The packaging system of claim 1 wherein:
the outer channels have a larger cross sectional area than the inner channels.
3. The packaging system of claim 2 wherein:
each outer channel has a lateral dimension greater than the lateral dimension of each inner channel.
4. The packaging system of claim 3 wherein:
each outer channel has a width at least twice the width of each inner channel.
5. The packaging system of claim 1 further comprising:
one or more bottom cooling layers located between the bottom panel and the payload; and
one or more top cooling layers located between the payload and the top panel.
6. The packaging system of claim 5 wherein:
a lower portion of each channel member is interposed between the bottom cooling layers and either a side panel or an end panel.
7. The packaging system of claim 1 wherein:
each channel member housing includes an outer layer of material wrapped around the inner facing panel, the outer facing panel and the channel side panels.
8. The packaging system of claim 1 wherein:
each channel member is spaced from the top panel and from the bottom panel a sufficient distance to allow air to flow through the outer channels and the inner channels.