Why does the Blood products low temperature sealed box keep coolant bays apart from the cavity?

Answer: A 4.0 mm wall splits a 490 × 330 × 310 mm cavity from four bays inside the 580 × 420 × 400 mm shell. The frame keeps the 20 mm panel off the cold bay wall.

What sets the 28% lip compression?

Answer: The outer lip cuts off water and the inner lip takes pressure. 28% keeps rebound in the cold without crushing the lip over 4000 cycles; below it a 1.0 m / 30 min immersion finds a corner path.

Which probes decide the 2–8 °C hold over 48 h?

Answer: The Blood products low temperature sealed box takes the point nearest the upper bound across centre, corners and rim. Any point outside the band at 48 h fails, and bay temperature is reference only.

When is the ≤0.4 kPa/min leak rate read?

Answer: After the φ16 mm valve equalises, with a static pressure reading first. It is filed apart from the 48 h hold readings, not merged into one curve.

Does immersion or drop come first in factory tests?

Answer: Immersion at 1.0 m for 30 min comes first, then the lid opens without drying; the 1.0 m drop and rim compression recheck follow, with IP67 and 4000 cycles last.

Blood products low temperature sealed box

Quick answer: The Blood products low temperature sealed box separates a 490 × 330 × 310 mm cavity from four coolant bays, holding 2–8 °C for 48 h.

Coolant bays separated from the cavity in the Blood products low temperature sealed box
Lip compression and the condensate path
Bonding the vacuum insulation panels and their thickness margin
Probe layout for the 48 h temperature hold
Factory test order for immersion and leak rate
FAQ

1. Coolant bays separated from the cavity in the Blood products low temperature sealed box

The Blood products low temperature sealed box sets aside a 490 × 330 × 310 mm cavity and four coolant bays inside a 580 × 420 × 400 mm shell, with a 4.0 mm wall between them. Bays open toward the lid, so the side wall keeps only a fill seam. A drainage slope carries condensate to the outside of the rim lip, away from the cavity. Humidity and pressure get separate jobs: the bays hold the zone, the rim holds the seal. A 20 mm vacuum panel lines the cavity, kept off the bay wall by a frame so its edge is not cracked by direct cold.

Four bays sit in symmetric pairs along the long edges, so no single bay biases the shell to one side.

Hold phase	Bay state	Verdict
At lid close	4 bays even	baseline logged
Mid hold	no condensate on bay wall	no seep
End of 48 h	2–8 °C band	no excursion
After opening	drainage slope dry	no backflow

2. Lip compression and the condensate path

A 28% compression on the twin lip lets the Blood products low temperature sealed box stop condensate and pressure at once. The outer lip meets the lid fold and cuts off water; the inner lip presses a second land and takes the pressure difference across the valve. Below 28% the gasket loses rebound in the cold and a 1.0 m immersion for 30 min finds a corner path; beyond it the lip crushes early over 4000 cycles and the ≤0.4 kPa/min leak rate fails.

Blood products low temperature sealed box angled open, grey foam divided into many rectangular cavities, side pressure valve and carry handle visible

The Blood products low temperature sealed box chooses the gasket for long compression in the 2–8 °C band, validated against a method with no certificate numbers or test-grade codes in the sheet. A φ16 mm valve sits outside the inner lip, so equalising pressure never crosses the seal face.

Seal stage	Working face	Value or verdict
Outer lip	lid fold	28% compression
Inter-lip gap	between the lips	water stays out of cavity
Inner lip	second land	takes pressure difference
Pressure valve	φ16 mm port	leak rate ≤0.4 kPa/min

3. Bonding the vacuum insulation panels and their thickness margin

The Blood products low temperature sealed box bonds a 20 mm vacuum panel around the cavity; the margin comes from the 580 × 420 × 400 mm outer size minus the 490 × 330 × 310 mm cavity, less the 4.0 mm wall and four bays. Bonding is full-area, not spot: a void becomes a local thermal bridge in the 48 h hold, and the 2–8 °C lower bound fails there first. Cut edges are foil-sealed before a batten fixes them.

The 20 mm panel and 4.0 mm wall are listed apart, so changing either means recalculating the cavity.

4. Probe layout for the 48 h temperature hold

For the 2–8 °C band held 48 h, the Blood products low temperature sealed box reads three probe groups: cavity centre, four corners, and just inside the rim. The verdict comes from the point nearest the upper bound, not an average, and any point outside the band at 48 h fails the run. No probe sits inside a bay.

Blood products low temperature sealed box empty and open, stepped grey foam cavities in lid and base, front handle and twin latches in view

After 48 h the lid opens and the inner lip is checked for water marks before the leak rate is read again. The ≤0.4 kPa/min value after the φ16 mm valve equalises is filed apart from the hold readings. Both the 9.2 kg empty shell and four empty bays are run.

Zone reading	Probe position	Verdict
Start	cavity centre	baseline logged
Mid hold	four corners	within 2–8 °C
End of 48 h	inside rim	highest point taken
After opening	inner lip	no water mark

5. Factory test order for immersion and leak rate

Factory tests run in a fixed order: the 580 × 420 × 400 mm outer size, 490 × 330 × 310 mm cavity, 4.0 mm wall and 20 mm panel are measured, then immersion at 1.0 m for 30 min, a 1.0 m drop, a ≤0.4 kPa/min leak rate, IP67 and 4000 cycles follow. Water on the inner lip or drainage slope after immersion fails the unit; the drop is followed by a rim compression check so 28% does not drift. Leak rate is read after the φ16 mm valve equalises. JUNZHIJIA logs each item so every lot of the Blood products low temperature sealed box traces to a figure; KeXin New Materials (Guangdong) Co., Ltd. validates against methods.

Conclusion

The Blood products low temperature sealed box splits zone and seal into two shell lines: four bays parted from a 490 × 330 × 310 mm cavity by a 4.0 mm wall, 20 mm vacuum panels around the cavity, a twin lip at 28% and a φ16 mm valve holding leak rate to ≤0.4 kPa/min. A 2–8 °C band over 48 h, immersion at 1.0 m for 30 min, a 1.0 m drop, IP67 and 4000 cycles form the fixed order; outer 580 × 420 × 400 mm and 9.2 kg empty bound the shell.