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6.1 SELF LEARNING -ENERGY SAVING
6.1.1 LEARNING ALGORITHM
The JEA observes the usage behaviour of the cooler and constructs a daily pattern. Each day is represented by 48 slots,
of 30-minute duration. Each slot is then assigned a mode, either DAY-mode or NIGHT-mode, depending on the cooler’s
usage level during that slot. The JEA learns 7 days’ worth of operation (336 slots) to reflect one week worth of cooler’s
usage pattern.
Example Pattern: In the following sample, 8AM to 9PM is the coolers busy period.
Slot:1-2
Slot:3-4
Slot:5-6
Slot:7-8
Slot:29-30
Slot:31-32
Slot:33-34
Slot:35-36
NIGHT
NIGHT
DAY
DAY
DAY
DAY
NIGHT
NIGHT
6AM
7AM
8AM
9AM
8PM
9PM
10PM
11PM
Week Array
When 24hour elapses, the 24hour array will be transferred to a Week-Array. After this, the pattern is saved in non-volatile
memory after each full week of learning.
Note: During the first week of operation the JEA controller will remain in DAY mode while it observes the coolers
operation pattern. After 7 days, the JEA will begin switching from DAY to NIGHT mode based on what it has learned
and saved in the week array.
6.1.2 ADVANCED LEARNING FEATURES
6.1.2.1 BREAK-OUT OF LEARNING:
Break out is when the JEA is in NIGHT mode and there is a door opening. If the accumulated door opening is >threshold,
the lights will turn on and the temperature settings will switch to DAY mode for this slot and the next two slots. The slot
is learned as DAY mode for the next week. Those extra slots however will not be learnt as day mode unless there are door
openings in them. If door openings occur in following slot, then the breakout period is extended by 2 slots from that slot.
6.1.2.2 REFILL PERIOD:
The Refill period is introduced to ignore times when the cooler is being refilled with products before the shop opens. If
the JEA is in NIGHT mode, door open = 1 and door open time > 3 Minutes, then this specific door opening is ignored by
the learning timers and scheme, so the slot will remain learnt as NIGHT.
6.1.2.3 LOOK-AHEAD:
The Look-ahead is added to allow setting the temperature of the cooler products in order for the products to reach the
correct temperature at the shop opening time. The Look-Ahead value is set to 3 hours (6 slots).
The JEA will take the cooler pattern and then switch into DAY mode from NIGHT mode 3hours (6 slots) earlier than the
learning pattern.
6.1.2.4 SOFTWARE IRREGULARITIES FILTRATION:
A software filter is added to change periods of NIGHT less than Look-Ahead value to DAY in order to overcome
irregularities.
For example, Look-Ahead = 6, then if the 24-hour array is found to be:
[D D D D N N N N N N D D D] this will be changed to [D D D D D D D D D D D D D]. Every 24hour the filter will be applied
to the 24hour array elements that have been saved
6.1.3 MANUAL MODE CHANGE:
The JEA will change from the current DAY/NIGHT mode to the opposite mode. It will then stay in the new mode until
the controller is due to change modes from the current/new mode to the opposite mode.
Example: Current learning pattern:
Slot#1
Slot#2
Slot#3
Slot#4
Slot#5
Slot#6
Slot#7
Slot#8
Slot#9
…
DAY
DAY
DAY
DAY
NIGHT
NIGHT
NIGHT
DAY
DAY
…
If the JEA mode is manually switched at slot#1, then the controller will change from DAY to NIGHT mode immediately
and remain in night mode until slot#8 where the JEA will change to Day mode.
Note: The unit will not save this change of modes in its learning pattern.
SOLL AT EK
INTELLIGENT CONTROL S
6.
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