Transcript Leopard Valve

Leopard Valve
Electronic Ratio Valve
ERV
Leopard valve
ERV - Dimensions:
ERV - Functionality
The ERV is a post-mix valve that uses a
combination of sensors, stepper motors and a
PC board to control flow rate and ratio.
When the valve is actuated, a signal is sent to
the PC board to start flow. The syrup and water
modules open allowing soda (or water) and
syrup to enter the mixing body. The PC board
monitors water flow rate based on information
sent by a small flow turbine. Syrup flow is
monitored by two transducers (pressure sensors)
located on the syrup module.
The PC board calculates actual ratio and
compares that to the programmed ratio. The PCB
then adjusts the stepper motor positions as
needed to regulate the flow rate and ratio. When
the activation signal is released, the stepper
motors close on both the syrup and water sides,
completing the drink cycle.
ERV - Functionality
The valve is programmed using a PDA or
TomCat device to set flow rate, and ratio.
In addition, the PDA ( only ) can be used to
obtain the following Diagnostic information
1.
2.
3.
4.
5.
Valve Serial Number
Current Flavor
Finished Drink Ratio
Flow Rate
Total, syrup and water dispense volumes
Since the valve is opened and closed using
stepper motors, it has a backup power supply
system that will not activate the valve until it is
fully charged.
This can take several (3-4) minutes upon initial
dispenser power up.
If there is a power failure, the back up system
provides power for the valve to close.
ERV - Features
IMPROVED QUALITY:
Electronically adjusts to provide correct water/syrup
ratio on every dispense
Ratio not affected by syrup temperature or system
pressure changes
Detects, indicates, & stops dispense when syrup or
water are depleted to limit waste and poor served
drink
Excellent casual drink temperature performance
ERV - Features
OPERATIONAL IMPROVEMENTS
Ratio re-adjustments are not necessary
Re-adjustments of volume portions are not necessary
True volume controlled portions resulting in less crew
intervention
System information stored within valve memory
Improved drink customer perception due to visual
pouring without pulsating water and then syrup,
continuous, quiet flow stream
ERV - Technical specifications:
Power requirements
Flow range
Flow Control
Ratio Range
Ratio Control
Supply Sold-Out
24V, 50 or 60 Hz, 1A
1.5 oz/sec to 6.0 oz/sec
45 ml/sec to 180 ml/sec
Constant volume feedback loop
for water and syrup.
3.5:1 to 10:1
Ratio priority feedback loop
for water and syrup.
Indicator LED on front panel
for water and syrup depletion
automatic return to normal operation
on replenishment of supply
ERV - Literature
Brochure
Installation Manual
Service Manual
Operator Manual
Crew Training Manual
Trouble Shooting Guide
Illustrated Parts List
TomCat Manual
Presentations:
Commercial introduction
Technical training
ERV - Approvals
TCCC Authorization
since June 2007
McDonald’s Global release
since April 2008
Agency listings
ERV - Issues
Initial ERV Set-up device:
Windows Pocket PC – HP iPAQ
Serial Communication Port
2008 – coming obsolete
US Investigates:
New Software based on Windows XP - Laptop
New Software based on Windows Mobile - Handheld
Enhance TomCat device with diagnostics
Coca-Cola “Red Brick” device (?)
Technician device:
IMI-Cornelius development “TomCat”
Cheap and very easy to use
No Diagnostics feature
ERV - Issues
Open issue: Cleaning Syrup lines
Solution: New development of Cleaning Plug
Timeline:
Field-test device available
Production release
June 2008
July 2008
2“
PN: 620xxxxxx
1“
Mini USB connector
What is a STEPPER MOTOR ?
Stepper Motor
Measures and
controls water flow
through the valve
Flow Turbine
Stepper Motor
Case contains
rotor and
bearings
Linear Stepper
Motor
Shaft moves up
and down to
regulate flow
through the
V-Groove
V – Groove Technology
Stepper Motor
Shaft
Patented
V-Groove
Flow
Rate
V-Groove gives
linear flow control
Cornelius Patent
Position
V - Groove
Needle
Valve
Flow Turbine
Water
Guide Vane
Optical
IR beam is
Transmitter interrupted
by the
rotor
Optical Digital
Device
6 pulses / ml
Water
Flow
Rotor
Optical
Receiver
Pressure Transducer
Syrup
Pressure
Transducer
Differential
pressure
measured across
an orifice plate
Syrup Orifice
Plate
Valve Setup
Syrup Settings
Syrup Type
None Sugar
Sugar
Flow
Curve offset sets flavor
+ offset
Flow
- offset
Differential Signal from
pressure transducer
Differential Signal from
pressure transducer
RTD Flow Rate
ONZ / sec
ML / sec
1.50
44
1.75
52
2.00
59
2.25
67
2.50
74
2.75
81
3.00
89