U.S. patent application number 11/696552 was filed with the patent office on 2007-08-02 for remote autonomous intelligent air flow control system and network.
Invention is credited to Peter S. Aronstam, Charles Saron Knobloch.
Application Number | 20070178825 11/696552 |
Document ID | / |
Family ID | 36387023 |
Filed Date | 2007-08-02 |
United States Patent
Application |
20070178825 |
Kind Code |
A1 |
Aronstam; Peter S. ; et
al. |
August 2, 2007 |
REMOTE AUTONOMOUS INTELLIGENT AIR FLOW CONTROL SYSTEM AND
NETWORK
Abstract
The present invention provides one or more autonomous in-duct or
register grill mounted flow control devices, each of which has the
capability to restrict or boost air flow through the duct or vent
to which it is attached. The individual flow control devices may be
in communication with other flow control devices in the duct works,
having an ability to adapt in a cooperative fashion to optimize the
environment served by the ductwork. In a preferred embodiment, each
of the flow control devices provides its own power and does not
require changing the existing ductwork or register boxes for
installation.
Inventors: |
Aronstam; Peter S.;
(Houston, TX) ; Knobloch; Charles Saron; (Katy,
TX) |
Correspondence
Address: |
CHARLES S. KNOBLOCH
1519 MISSION SPRINGS DRIVE
KATY
TX
77450
US
|
Family ID: |
36387023 |
Appl. No.: |
11/696552 |
Filed: |
April 4, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
10987476 |
Nov 12, 2004 |
|
|
|
11696552 |
Apr 4, 2007 |
|
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|
Current U.S.
Class: |
454/290 |
Current CPC
Class: |
F24F 11/30 20180101;
F24F 11/0001 20130101; F24F 11/62 20180101 |
Class at
Publication: |
454/290 |
International
Class: |
F24F 13/08 20060101
F24F013/08 |
Claims
1. A device for controlling air flow through a duct, the device
comprising: a flow control member configured to selectively control
air flow through the device; a controller member configured to
autonomously control the flow control member; and a power member
for supplying power to the device.
2. The device of claim 1, further including a communication device
operatively attached to the controller member, the communication
device is configured to enable remote programming of the controller
member.
3. The device of claim 1, wherein the controller member comprises a
timer configured to control a time cycle of the flow control
member.
4. The device of claim 1, further including at least one sensor
configured to measure a parameter in the duct.
5. The device of claim 4, wherein the parameter is a pressure in
the duct.
6. The device of claim 1, wherein the flow control member is
configured to retard air flow through the device.
7. The device of claim 1, wherein the flow control member is
configured to enhance air flow through the device.
8. The device of claim 1, wherein the flow control member comprises
a fan or a blower.
9. The device of claim 1, wherein the flow control member comprises
a generator configured to enhance or retard air flow through the
device.
10. The device of claim 1, wherein the flow control member is
configured to selectively control air flow through the device by
enhancing air flow or retarding air flow based on an environmental
condition.
11. The device of claim 1, wherein the flow control member
comprises an array of fans.
12. The device of claim 1, wherein the flow control member
comprises at least one device selected from the group consisting of
gates, louvers, a butterfly valve, or petals.
13. The device of claim 1, wherein the controller member comprises
an internal program memory.
14. The device of claim 1, wherein the controller member is capable
of controlling the flow control member based upon an environmental
condition.
15. The device of claim 1, wherein the controller member is
configured to receive data, analyze the data, and control the flow
control member as a result of the analyzed data.
16. The device of claim 15, wherein the controller member is
configured to store the data in a memory member.
17. The device of claim 1, wherein the power member comprises a
replaceable battery.
18. The device of claim 1, wherein the power member is configured
to generate power based upon airflow through the device.
19. The device of claim 18, wherein the generated power is stored
in a power storage member.
20. The device of claim 19, wherein the power storage member is a
capacitor.
21. The device of claim 1, wherein the power member is configured
to generate data regarding a parameter in the duct by utilizing the
airflow through the device.
22. The device of claim 21, wherein the parameter is a pressure in
the duct.
23. The device of claim 21, wherein the parameter is an air
pressure or a temperature in the duct.
24. A method of using one or more flow control devices in a system
of ducts, the method comprising: placing at least one flow control
device at a selected location in the system of ducts, the at least
one flow control device comprising an air flow control member, a
controller member, and a power member; controlling the airflow
through a portion of the system of ducts by selectively
manipulating the at least one flow control flow device through the
execution of a series of program instructions within the controller
member; and modifying an environmental condition in an area
adjacent the selected location by an autonomous decision process
within the at least one flow control device.
25. The method of claim 24, further comprising generating energy
for the flow control device by utilizing the air flow through the
system of ducts.
26. The method of claim 24, wherein the series of program
instructions is generated by a conventional algorithm.
27. The method of claim 24, wherein the series of program
instructions is generated by adaptive programming.
28. The method of claim 24, wherein the series of program
instructions is generated by utilizing a look-up table.
29. The method of claim 24, wherein the environmental condition is
modified for reducing energy consumption.
30. The method of claim 24, wherein the environmental condition is
modified to substantially prevent mold or stale air from residing
in the area.
31. The method of claim 24, wherein the series of program
instructions is used to substantially prevent system damage due to
over restriction of airflow in the system of ducts.
32. An apparatus for controlling an environmental condition in an
area, the apparatus comprising: an air flow control member
configured to selectively control air flow through the apparatus; a
controller member configured to autonomously control the air flow
control member based upon the environmental condition; a power
member for supplying power to the device; and a sensor member
configured to measure and send data to the controller member
regarding the environmental condition in the area.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional of co-pending U.S. patent
application Ser. No. 10/987,476, filed Nov. 12, 2004, which is
herein incorporated by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates generally to the control of
fluid movement through a duct or conduit. More particularly, the
present invention relates to the use of one or more autonomous flow
control devices, able to operate independently of an existing
environmental control system.
[0004] 2. Description of the Related Art
[0005] The typical air vents in commercial and residential settings
consist of louvers which may be manually opened or closed in
varying degrees. These air vents provide a limited ability to
adjust the amount of air flow into a room or area, the air coming
from a central environmental control unit, such as a furnace,
central air conditioner, or dehumidifier. There may be several such
vents connected, via ducts, to the central environmental control
unit, each vent providing air flow to a room or area. Since these
vents are generally connected to a central unit, the opening or
closing of one or more vents affects the air flow to the other
vents. If it is desired to restrict the flow of air in single area
or room, then the other rooms or areas are affected. To restrict
the flow to a room or area, the vent for that room or area must be
manually adjusted. Furthermore, a single thermostat typically
controls the operation of the environmental control unit. If that
thermostat is in the room or area where the air flow is adjusted,
then the temperature and climate of the other rooms or areas are
affected. The temperature and climate of the other rooms or areas
are affected even if the thermostat is not in the room or area were
the air flow is adjusted, owing to the fact that the ratios of air
flow between the remaining vents are altered by the opening or
closing of any of the vents. This usually leads to the need to
readjust all vents if any one of the vents is opened or closed, a
process which may require several iterations to perfect, and then
only for the specific conditions at the time the adjustment was
made. Further, if one overly restricts airflow by closing too many
vents, damage to the environmental control unit may occur.
[0006] An additional inconvenience occurs in cases where the vent
to be adjusted resides in a tall ceiling. The user must climb a
ladder or use a stick to open and close the vent. An additional
inconvenience occurs in situations where a user wishes to open or
close a vent at a certain time during the day to account for
changes in solar influx or room use pattern. In one example, a user
wishes to keep certain vents restricted during the night to
conserve energy, such as to emphasize the vents in the sleeping
quarters, and then close them during the day. A further
complication occurs when a user wishes to boost the heating or
cooling in a specific room. With a conventional installation, the
only way to boost a given room is to restrict flow in other rooms,
requiring that the user change multiple vent controls in other
rooms to accomplish the users goals.
[0007] This problem has been partially addressed with various
remote-controlled vent louvers. A user may install a vent louver
that is powered by being wired to a source of electricity or by
batteries. The remote control allows the user to point at the vent
to open or close the vent. Such a configuration reduces the need
for manually adjusting the vent, but either requires wiring to the
mains or periodic battery replacement. A further restriction of
these devices is that they can only retard flow; they cannot boost
the local air flow, limiting their ability to increase cooling,
heating, humidity, or to control complex multi-room issues.
SUMMARY OF THE INVENTION
[0008] What I am about to describe here is a new way to control the
air flow through a duct or duct works system. The present invention
provides one or more autonomous in-duct or register grill mounted
flow control devices, each of which has the capability to restrict
or boost air flow through the duct or vent to which it is attached.
The individual flow control devices may be in communication with
other flow control devices in the duct works, having an ability to
adapt in a cooperative fashion to optimize the environment served
by the ductwork. In a preferred embodiment, each of the flow
control devices provides its own power and does not require
changing the existing ductwork or register boxes for
installation.
[0009] The in-duct or register grill mounted flow control devices
of the present invention are inserted into the ductwork served by
the environmental control unit. In a preferred embodiment, these
flow control devices comprise a means to restrict flow, a means to
supply power, a means to communicate, and a means to provide
adaptive control enabling cooperation with other similar devices.
The flow restriction provided in the present invention is a
substantial improvement over previous turbine and louver designs in
that it is capable of operating safely over a broader range of
flow, typically up to 100%. Each flow control device has a
communications means which allows it to be cognizant of the status
of the other devices in the ductwork, the local environmental
conditions, such as temperature or humidity, in the room it is
serving, and the functional requests of the user which may be input
from time to time via a remote hand held controller. The adaptive
control and cooperation is provided by a series of electronic
circuits, with appropriate microcontroller and drivers to activate
the functions of the flow control device in accordance with
functional requests entered by the user from time to time. The
combination of these means gives the flow control device the
capability to regulate the environment in the served room while at
the same time cooperating with other devices in the ductwork to
optimize meeting the functional request of the user.
[0010] In operation, when a plurality flow control device is placed
in the ducts, register boxes, or on register grills a greater
measure of improvement can be effected. Each flow control device
collects the local environmental conditions. Each flow control
device also collects its operational status and makes available
through the communications means such operational status and local
environmental conditions to other flow control devices, thereby
creating an information matrix. Each flow control device applies
its adaptive control means using the information matrix to adjust
the amount of flow restriction with consideration of the other flow
control devices, thus maintaining the functional request of the
user.
[0011] The flow control device does not need the environmental
control unit to be circulating air to effect local environmental
conditions. By incorporating a flow reversing means such as a fan
or turbine, the flow control device is able to move air through the
ductwork. In this manner if a room becomes too cold or hot, the
flow control device can circulate hot or cold air out of the room
towards a room capable of actuation the environmental control unit
such as a room with a thermostat connected to the environmental
control unit.
[0012] Even in a single flow control device installation, the
device with its flow reversing means is capable of providing a
level of control. Monitoring its internal operational status and
local environmental conditions, a flow control device can either
accelerate or retard flow to meet the user's functional
request.
BRIEF SUMMARY OF THE INVENTION--OBJECTS AND ADVANTAGES
[0013] It is an object of the present invention to enable a
plurality of flow control devices capable of both increasing and
decreasing the delivered air flow to a given room or rooms.
[0014] An advantage of the present invention is that the individual
flow control devices through out the ductwork can communicate with
each other providing a collective intelligence enabling of managing
the interdependence of air flow on each other.
[0015] It is a further object of the present invention to enable
the flow control devices to determine the best independent behavior
to satisfy the overall environmental control goals.
[0016] It is a further object of the present invention to eliminate
the need for a central controller or central processing unit to
achieve overall environmental control goals. An advantage of this
configuration is that even if one or more flow control devices
fail, the remaining collective of devices adapt and continue to
operate towards the overall environmental control goals. Further,
if the communications means between flow control devices partially
or totally fail, the flow control devices still continue to operate
independently, or partially independently towards achieving the
overall environmental control goals. Thus, there is no central
processing unit to cause complete system failure.
[0017] It is a further object of the present invention to have the
ability to increase the local flow by either boosting flow or
influencing other flow control devices in the ductwork to restrict
flow.
[0018] It is a further object of the present invention to enable a
flow control device to automatically adjust, regulating an area to
a desired temperature.
[0019] It is a further object of the present invention to enable
installation of one or more flow control devices without the need
for electrical wiring, modification of the duct work, or register
boxes, or connecting to the environmental control unit.
[0020] An advantage of the present invention is that the user does
not have to physically go to the duct or vent in order to manually
adjust the vent, program new instructions or goals, or to perform
battery replacement.
[0021] It is an advantage of the present invention to provide
limited environmental regulation even when the environmental
control unit system is in the off state.
[0022] It is an object of the present invention to enable flow
restriction beyond the typical 5% to 35% range.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The present invention and its advantages will be better
understood by referring to the following detailed description and
the attached drawings in which:
[0024] FIG. 1 shows a 3-D perspective view illustrating a typical
application of an environmental control unit;
[0025] FIG. 2 shows a diagrammatic view illustrating the present
invention in the context of a typical application;
[0026] FIG. 3 shows a 3-D perspective view illustrating the use of
sensors 8 and positioning of flow control devices 5;
[0027] FIG. 4 shows a 3-D perspective view illustrating flow
control device 5 as installed in ductwork 2 with a schematic view
of intelligent controller 70;
[0028] FIG. 5 shows a 3-D perspective view illustrating a
single-fan embodiment of flow control device 5 as installed in
ductwork 2 with a schematic view of intelligent controller 70';
[0029] FIG. 6 shows a 3-D perspective view illustrating a multi-fan
embodiment of flow control device 5 as installed in ductwork 2 with
a schematic view of intelligent controller 70'';
[0030] FIG. 7 shows a 3-D perspective view illustrating use of
remote programming device 42 to change programming instructions in
flow control device 5;
[0031] FIG. 8 shows a 3-D perspective view illustrating use of
remote polling unit 43 to extract parameters from flow control
device 5;
[0032] FIG. 9 shows a diagrammatic view illustrating the present
invention in the context of transmitting environmental control unit
commands 104 to central controller 80';
[0033] FIG. 10 shows a 3-D perspective view illustrating
communications device 40 with a schematic view of sensor 8;
[0034] FIG. 11 shows a 3-D perspective view illustrating
communications device 40 with a schematic view of sensor-network
module 8', a network interface embodiment of sensor 8;
[0035] FIG. 12 shows a 3-D perspective view illustrating a method
of installing the present invention in a circular duct;
[0036] FIG. 13 shows a 3-D perspective view illustrating a method
of installing the present invention in a register box;
[0037] FIG. 14 shows a 3-D exploded perspective view illustrating a
method of installing the present invention in a register grill;
[0038] FIG. 15 shows a 3-D perspective view illustrating a method
of installing the present invention in a register grill as placed
into a register box;
[0039] FIG. 16 shows a side view illustrating an AC line network
embodiment of sensor-network module 8';
[0040] FIG. 17 shows a front view illustrating an AC line network
embodiment of sensor-network module 8';
[0041] FIG. 18 shows a schematic view illustrating an AC line
network embodiment of sensor-network module 8';
[0042] FIG. 19 shows a front view illustrating an inductive coupler
AC line network embodiment of sensor-network module 8';
[0043] FIG. 20 shows a side view illustrating an inductive coupler
AC line network embodiment of sensor-network module 8';
[0044] FIG. 21 shows a schematic view illustrating an inductive
coupler AC line network embodiment of sensor-network module 8';
[0045] FIG. 22 shows a diagrammatic view illustrating operation of
a plurality of flow control devices 5 with environmental control
unit 100 in the on state;
[0046] FIG. 23 shows a flow chart view illustrating the operation
of the present invention;
[0047] FIG. 24 shows a diagrammatic view illustrating operation of
a plurality of flow control devices 5 with environmental control
unit 100 in the off state; and
[0048] FIG. 25 shows a tabular view of operations status table
101.
REFERENCE NUMERALS IN DRAWINGS
[0049] The following elements are numbered as described in the
drawings and detailed description of the invention: [0050] 1 Air
Flow 42 Remote Programming Unit [0051] 2 Ductwork 43 Remote Polling
Unit [0052] 2a, 2b, 2c Ductwork Branches 44 Sensor Communications
Device [0053] 3 Register Box 50 Microcontroller [0054] 4, 4a, 4b,
4c Register Grill 51 Sensor Microcontroller [0055] 5, 5a, 5b, 5c
Flow Control Device 52 Analog To Digital Converter [0056] 7
Adjustable Size Bracket 54 Temperature Sensor [0057] 6 Grill
Mounting Bracket 55 Room Temperature Sensor [0058] 8, 8a, 8b, 8c
Sensor 56 Room Proximity Sensor [0059] 8'Sensor-Network Module 57
Room Humidity Sensor [0060] 9 AC Line Network 60 Petal Valve [0061]
9'Network 62 Flow Restriction Control [0062] 10, 10'Rotating
Structure 64 Stepper Motor [0063] 11 Petal Valve Bracket 70, 70',
70'' Intelligent Controller [0064] 12 Network Interface 71
Intelligent Controller Housing [0065] 21 Switch Plate 80, 80'
Central Controller [0066] 22 Wall 100 Environmental Control Unit
[0067] 23 Electrical Box 101, 101a, Operational Status Table [0068]
101b, 101c [0069] 30 Power Storage 102, 102a, Environmental Status
102b, 102c Table [0070] 31, 31'' Motor-Dynamo 103 Remote Program
Instructions [0071] 33, 33'' Motor-Dynamo Bus 104 Environmental
Control Unit Command [0072] 35 Power Manager 105 Requested
Parameters [0073] 36, 36'' Load Controller 121, 122, 123 Rooms
[0074] 37 Power Regulator 441 Infra-Red Photo Diode [0075] 38 Power
Source 442 Infra-Red LED [0076] 39 Power Bus 443 Driver [0077] 40
Communications Device 1201 AC Modem [0078] 41 Communications
Driver
DETAILED DESCRIPTION
[0079] The common configuration for environmental control in use
today is shown in FIG. 1. Environmental control unit 100 delivers
heated or cooled air through ductwork 2 into rooms 121, 122, 123.
Ductwork 2 can be any system of conduits capable of transferring
conditioned air from an environmental control unit to rooms. Rooms
121, 122, 123 can be any space or zone where environmental control
is desired. Environmental control unit 100 can be any one of a
number of devices such as a HVAC unit, a dehumidifier, and furnace,
evaporative cooling unit, or other such air conditioning devices.
Central controller 80, as shown by example to be located in room
123, regulates the operation of environmental control unit 100.
Central controller 80 can be a thermostat, humidity controller,
timer, or any of many devices typical of controlling an
environmental control unit. An inhabitant of room 123 with the
central controller 80 enjoys a measure of comfort due to the
proximity of central controller 80; however, any inhabitants of the
other rooms 121, 123 are subject to the variations caused by
differing environmental sources or conditions which are not sensed
by central controller 80. If for example, an inhabitant of room 121
has afternoon sun heating room 121, then room 121 will be
substantially hotter than the temperature set on central controller
80. This illustrates the problem addressed by the present
invention.
[0080] FIG. 2 illustrates the present invention as installed in a
typical configuration. Environmental control unit 100 is connected
to ductwork 2. Ductwork branches 2a, 2b, 2c extend from ductwork 2
to one or more rooms 121, 122, 123. Central controller 80 may be
placed in one room 123 and is in communication with environmental
control unit 100. One or more flow control devices 5a, 5b, 5c are
installed in respective ductwork branches 2a, 2b, 2c. Register
grills 4a, 4b, 4c attach to the termination of ductwork branches
2a, 2b, 2c, respectively. Flow control devices may be installed as
shown within the ductwork, ductwork branches, or alternatively
installed at the termination of the ductwork branches.
Communications devices 40a, 40b, 40c are mounted on register grills
4a, 4b, 4c, respectively, and electrically connected to respective
flow control devices 5a, 5b, 5c. Communications devices may be any
typical wireless or wired system using infra red, 802.11 spread
spectrum, digital cable, RS-232, modem, AC line network,
ultrasonic, .times.10, Zigbee, Bluetooth, instrumentation bus, or
other wire or wireless methods and protocols and any combination
thereof. These communications means may also include use of one or
more relays to move information through out the installation.
Sensors 8a, 8b, 8c are located within rooms 121, 122, 123 and are
in communication with communications devices 40a, 40b, 40c. Sensors
8a, 8b, 8c capture the rooms' environmental condition which may
include temperature, humidity, date, day, time of day, use,
proximity of inhabitants, or user desired environmental condition,
such as desired temperature. Environmental status tables 102a,
102b, 102c are passed from sensors 8a, 8b, 8c to the flow control
devices 5a, 5b, 5c by way of the communications devices 40a, 40b,
40c, respectively. Environmental status tables contain summaries of
all data collected by the sensors regarding the environmental
condition of the room. Operational status tables 101 may be passed
amongst flow control devices 5a, 5b, 5c by way of communications
devices 40a, 40b, 40c. The operational status table may be any
combination of data regarding the current operating status,
internal workings of the flow control devices, or local
environmental conditions and will be described further in
subsequent paragraphs.
[0081] FIG. 3 illustrates an alternate embodiment of the
communications means. Operations status tables 101 may be passed
amongst flow control devices by way of sensors 8a, 8b, and 8c. This
is accomplished by connecting sensors 8a, 8b, 8c to AC line network
9, as is detailed in FIG. 11 and FIGS. 16, 17, and 18. An AC line
network uses the existing AC distribution wiring to allow
communications. This is accomplished using various technologies
such as AC modems or X10.
[0082] FIG. 4 is a detailed illustration of the flow control device
5 as mounted in duct 2. Flow control device 5 contains rotating
structure 10. Rotating structure 10 can be a propeller, turbine, or
any structure which is capable of being moved by the air flow
passing through the unit. Rotating structure 10 is axially
connected to motor-dynamo 31. The motor dynamo is a brush, or
brushless motor, or any device providing the means of generating
power and driving the rotating structure. The combination of the
rotating structure and the motor dynamo provides the flow control
device with the means to generate power, means to boost flow, and a
means to restrict flow. Motor-dynamo 31 is axially connected to
intelligent controller housing 71. Stepper motor 64 is axially
connected to intelligent controller housing 71. The stepper motor
64 can be any device capable of actuating an additional flow
restricting device. The stepper motor 64 is axially connected to
petal valve 60. Petal valve 60 could be any valve structure capable
of reducing flow though flow control device 5. The petal valve
provides additional means of flow restriction. These means to
restrict flow enable various intermediate values between full open
and full closed, allowing partial restriction of air flow through
the duct. The whole assemblage of flow control device 5 is firmly
fit within duct 2.
[0083] Within intelligent controller housing 71 are located
intelligent controller 70 and power storage 30. Communications
device 40 is connected by wires to intelligent controller 70 and is
situated preferably downstream of flow control device 5. Flow
control device 5 is preferably oriented such that petal valve 60 is
located upstream of rotating structure 10. Intelligent controller
70 comprises multiple electrical subsystems providing the means to
adaptively control flow in duct 2. Intelligent controller 70 is
typically a printed circuit card or integrated electronic chip.
Motor dynamo 31 is electrically connected to motor dynamo bus 33 of
intelligent controller 70. The Motor dynamo bus 33 allows multiple
circuit subsystems to transfer electrical energy to or from the
motor dynamo as required for proper functioning. Motor dynamo bus
33 is electrically connected to power manager 35. Power manager 35
is electrically connected to power bus 39. Power bus 39 is
connected to power storage 30. The power manager acts as a
bidirectional switch and power regulator between the motor dynamo
bus 33 and the power bus 39. The power bus 39 provides a delivery
conduit for electrical energy to all circuit subsystems in
intelligent controller 70. Alternatively, the circuit subsystems
may be powered by independent means. Stepper motor 64 is
electrically connected to flow restriction control 62. The flow
restriction control 62 is electrically connected to power bus 39.
Flow restriction control 62 controls the flow of electrical energy
to stepper motor 64 and actuating petal valve 60. Communications
device 40 is electrically connected to communications driver 41.
Communications driver 41 is electrically connected to power bus 39.
Power bus 39 is electrically connected to the microcontroller 50.
Microcontroller 50 is logically connected to and controls the
operation of communications driver 41. Communications driver 41
manages the data sent to or received from communications device 40.
Microcontroller 50 is logically connected to and controls the
operation of flow restriction control 62. Microcontroller 50 is
logically connected to and controls the operation of load control
36. Microcontroller 50 is logically connected to and controls the
operation of power manager 35. Microcontroller 50 is logically
connected to and controls the operation of analog to digital
converter 52. The analog to digital converter returns data to the
microcontroller 50. Analog to digital converter 52 receives a data
signal from temperature sensor 54 indicating the current
temperature of the air in duct 2. Analog to digital converter
receives a data signal from power bus 39 representing the charge
level of the power storage 30. Analog to digital converter 52
receives a data signal from power manager 35. Analog to digital
converter 52 receives a data signal from motor dynamo bus 33
indicative of the flow in duct 2. Alternatively analog to digital
converter 52 functions could be distributed into the various
circuit subsystems allowing digital signals to be presented
directly to micro controller 50.
[0084] FIG. 5 is a detailed illustration of an alternate of
embodiment flow control device 5. Flow control means is implemented
with a single rotating structure 10'. Rotating structure 10 can be
a propeller, turbine or any structure which is capable of being
moved by the air flow passing through the unit. The rotating
structure serves as both a power generation means and as a flow
control means. Rotating structure 10 is axially connected to
motor-dynamo 31. The motor dynamo is a brush, or brushless motor,
or any device providing the means of generating power and driving
the rotating structure. The combination of the rotating structure
and the motor dynamo provides the flow control device with the
means to generate power, means to boost flow, and a means to
restrict flow. Motor-dynamo 31 is axially connected to intelligent
controller housing 71. Within intelligent controller housing 71 are
located intelligent controller 70' and power storage 30.
Communications device 40 is connected by wires to intelligent
controller 70, and is situated preferably downstream of flow
control device 5. Intelligent controller 70' comprises multiple
electrical subsystems providing the means to adaptively control
flow in duct 2. Intelligent controller 70 is typically a printed
circuit card or integrated electronic chip. Motor dynamo 31 is
electrically connected to motor dynamo bus 33 of intelligent
controller 70'. The motor dynamo bus 33 allows multiple circuit
subsystems to transfer electrical energy to or from the motor
dynamo as required for proper functioning. Motor dynamo bus 33 is
electrically connected to power manager 35. Power manager 35 is
electrically connected to power bus 39. Power bus 39 is connected
to power storage 30. The power manager acts as a bi-directional
switch and power regulator between the motor dynamo bus 33 and the
power bus 39. The power bus 39 provides a delivery conduit for
electrical energy to all circuit subsystems in intelligent
controller 70'. Alternatively the circuit subsystems may be powered
by independent means. Communications device 40 is electrically
connected to communications driver 41. Communications driver 41 is
electrically connected to power bus 39. Power bus 39 is
electrically connected to the microcontroller 50. Microcontroller
50 is logically connected to and controls the operation of
communications driver 41. Communications driver 41 manages the data
sent to or received from communications device 40. Microcontroller
50 is logically connected to and controls the operation of load
control 36. Microcontroller 50 is logically connected to and
controls the operation of power manager 35. Microcontroller 50 is
logically connected to and controls the operation of analog to
digital converter 52. The analog to digital converter returns data
to the microcontroller 50. Analog to digital converter 52 receives
a data signal from temperature sensor 54 indicating the current
temperature of the air in duct 2. Analog to digital converter
receives a data signal from power bus 39 representing the charge
level of the power storage 30. Analog to digital converter 52
receives a data signal from power manager 35. Analog to digital
converter 52 receives a data signal from motor dynamo bus 33
indicative of the flow in duct 2. Alternatively analog to digital
converter 52 functions could be distributed into the various
circuit subsystems allowing digital signals to be presented
directly to micro controller 50.
[0085] FIG. 6 is a detailed illustration of another alternate
embodiment flow control device 5 as mounted in duct 2. Flow control
device 5 contains rotating structure 10. Rotating structure 10 can
be a propeller, turbine, or any structure which is capable of being
moved by the air flow passing through the unit. Rotating structure
10 is axially connected to motor-dynamo 31. The motor dynamo is a
brush, or brushless motor, or any device providing the means of
generating power and driving the rotating structure. The
combination of the rotating structure and the motor dynamo provides
the flow control device with the means to generate power, means to
boost flow, and a means to restrict flow. Motor-dynamo 31 is
axially connected to intelligent controller housing 71. A second
rotating structure 10'' is axially connected to intelligent
controller housing 71. Rotating structure 10'' can be a propeller,
turbine, or any structure which is capable of being moved by the
air flow passing through the unit. Here an active flow restriction
means is used in conjunction with the fan/generator to control the
amount of flow through the duct. Either of the rotating structures
10 or 10'' can be switched between generating and obstructing
functions, or the two in combination by independent power managers
35 and 35' and load controls 36 and 36' under the supervision of
microcontroller 50, all contained within intelligent controller
70''. Rotating structures 10 and 10'' can also be driven by current
from electrical energy stored in power storage 30 by way of
independent power managers 35 and independent buses 33 and 33'.
Alternately, the rotating structures 10 and 10'' can be rotated
such that each is out of phase the with other to cause controllable
flow restriction. The multiple rotating structures of this
embodiment have the advantage of preventing the complete closure of
all vents, which may lead to damage of the central blower of the
heating or cooling unit, while also enabling infinitely variable
settings other than just open and closed. Although FIG. 9 only
represents two rotating structural elements, one can envision a
larger number of devices to either increase generation or improve
restriction of the unit.
[0086] Each of the flow control devices behaves according to
preprogrammed instructions in microcontroller 50. Many of these
scenarios or behaviors are programmed in on manufacture and only
need to be selected by the user. Others may require uploading by
the user. FIG. 7 shows a user using a remote programming device 42
to transmit remote program instructions 103 to flow control device
5 in room 123. This method could also be used to select the target
operating environmental conditions the user wishes to maintain.
Alternately, input of the functional requests of the user can be
built in to sensor unit 8.
[0087] In an alternate embodiment illustrated in FIG. 8, the means
to communicate, such as communications device 40, further comprises
a polling means whereby a user or technician may request one or
more parameters from operational status table 101 and the
environmental control table 102. Intelligent controller 70 sends
the requested parameters 105 of operational status table 101 and
the environmental control table 102 to communications device 40.
Communications device 40 transmits requested parameters 105 to a
remote polling unit 43. Remote polling unit 43 may additionally be
used to collect requested parameters 105 periodically over time,
thereby providing the ability to monitor overall performance.
[0088] In an alternate embodiment, not illustrated, the means to
communicate, such as communications device 40, further comprises a
status indication means to indicate operational status to the user.
This may include indicating low power reserve, amount of flow
restriction, amount of flow boost, failure conditions, or other
parameters from operational status table 101 or environmental
control table 102. The means to communicate may be transmitted in a
wide variety of ways, typically as data through a wireless
transceiver or indicated by lighting a light emitting diode, which
can be seen at register grill 4.
[0089] In an alternate embodiment, as illustrated in FIG. 9, at
least one flow control device 5b sends an environmental control
unit command to its communications device 40b. Communications
device 40b transmits environmental control unit command 104, which
is received by central controller 80'. Central controller 80'
responds to the received environmental control unit command 104,
thereby modifying the operation of environmental control unit 100.
This allows the plurality of flow control devices to effectuate a
request to the environmental control unit to change states if
preprogrammed conditions occur.
[0090] FIG. 10 illustrates sensor 8. Sensor 8 comprises sensor
communications device 44. Sensor communications device 44 transmits
environmental status table 102 to communications device 40 of a
flow control device 5. Sensor communications device 44 may be any
typical wireless or wired system using infra red, 802.11 spread
spectrum, digital cable, RS-232, modem, AC line network,
ultrasonic, X10, Zigbee, Bluetooth, instrumentation bus, or other
wire or wireless methods and protocols and any combination thereof,
which is able to communicate with communications device 40. Sensor
communications device 44 electrically connects to sensor
microcontroller 51, which is powered by power source 38 by way of
power regulator 37. Sensor microcontroller 51 is connected to one
or more sensor devices, such as room temperature sensor 55, room
proximity sensor 56, room humidity sensor 57, and user preference
sensor 58. These various sensor devices may be based on any of a
number of sensing means, such as infrared, acoustic, resistive,
semiconductor junctions, capacitive, inductive, received timing
signals, switch setting, or position. A user preference sensor may
be a settable thermostat, digital keypad, or other means of user
input. Sensor microcontroller 51 converts the signals sensed by the
various sensor devices, populating environmental status table 102
for transmission to communications device 40 by way of sensor
communications device 44.
[0091] In a further alternate embodiment, the means to communicate,
such as communications device 40, further comprises sensing means,
such as an infra-red or laser environmental sensor capable of
scanning the served room for the necessary data to fill
environmental status table 102. This reduces the need for a
separate sensor 8, separately installed in the room.
[0092] FIG. 11 illustrates sensor-network module 8', which is an
alternative embodiment of sensor 8, incorporating a means to
communicate operational status tables between flow control devices.
Sensor-network module 8' comprises sensor communications device 44.
Sensor communications device 44 transmits environmental status
table 102 to communications device 40 of a flow control device 5.
Flow control device 5 communicates operational status table 101 to
communications device 40 which, in turn, transmits operational
status table 101 to sensor communications device 44. Sensor
communications device 44 electrically connects to sensor
microcontroller 51, which is powered by power source 38 by way of
power regulator 37. Sensor microcontroller 51 is connected to one
or more sensor devices, such as room temperature sensor 55, room
proximity sensor 56, and room humidity sensor 57. Sensor
microcontroller 51 converts the signals sensed by the various
sensor devices, populating environmental status table 102 for
transmission to communications device 40 by way of sensor
communications device 44.
[0093] Sensor microcontroller 51 is electrically connected to
network interface 12, which is connected to network 9'. Operational
status table 101 is relayed to network 9' by way of sensor
microcontroller 51 and network interface 12. Network interface 12
receives operational tables 101' from other flow control devices
which are in communication with network 9'. Operational status
tables 101' are relayed to sensor communications device 44 by way
of sensor microcontroller 51. Sensor communications device 44
transmits operational status tables 101' to flow control device 5
by way of communications device 40. This allows operational status
tables 101' to be reliably sent between flow control devices via
their corresponding sensor-network modules.
METHOD OF APPLICATION
[0094] As illustrated in FIG. 12, flow control device 5 of the
present invention may be constructed to fit into a standard
circular air duct of, say 4'' or 6'' or 8'' diameter. With this
configuration, register grill 4 may be removed to expose register
box 3 and a flow control device 5 inserted within the interior of
the duct 2. Flow control device 5 may be placed within the air duct
by means of a friction fit, adhesive, Velcro, or other affixing
means. Register grill 4 may be reattached, thus not changing the
exterior decorative style. In the preferred embodiment, no wires
need be attached or connected to the air vent of the present
invention, as the signals to open or restrict air flow will be sent
to the communication interface means by use of wireless signals.
Some installations may require that communications device 40 be
attached to the front of register grill 4 using a simple extension
cable.
[0095] As illustrated in FIG. 13, adjustable size bracket 7 is used
to affix flow control device 5 within register box 3. This method
of installation may be used in the event there are obstructions in
duct 2 near its termination into register box 3.
[0096] A third method of installation is illustrated in FIG. 14.
Flow control device 5' is affixed to register grill 4. Flow control
device 5' has all the same components as the duct version, arranged
in a different geometry. Grill mounting bracket 6 is affixed to the
interior side of register grill 4. One or more parallel rotating
structures 10 are mounted side by side into grill mounting bracket
6, effectively covering the vent area of register grill 4. Power
storage 30 is placed within grill mounting bracket 6. Petal valve
bracket 11 is affixed to grill mounting bracket 6. One or more
petal valves 60 are mounted side by side into petal valve bracket
11 such that they are axially oriented coincident to rotating
structures 10. Once mounted in register box 3, FIG. 15 illustrates
grill mounting bracket 6 with communications device 40 and rotating
structures 10 of flow control device 5', with register grill 4 not
shown for clarity.
[0097] FIGS. 16, 17, and 18 illustrate one embodiment of
sensor-network module 8'. FIG. 16 illustrates a side view of
sensor-network module 8' and FIG. 17 is the front view.
Sensor-network module 8' in this embodiment is designed to be
installed in a standard AC outlet. FIG. 18 shows the specific
internal workings of the sensor-network module 8' embodiment. In
this embodiment, sensor communications device 44 includes infra-red
photo diode 441 and infra-red LED 442 driven by driver 443. In this
embodiment, network interface 12 includes an AC modem 1201. AC
modem 1201 is connected to AC line network 9, which also serves as
power source 38. This allows sensor-network module 8' to provide
all the capabilities of the embodiment shown in FIG. 11.
[0098] FIGS. 19, 20, and 21 illustrate another embodiment of
sensor-network module 8'. FIG. 19 illustrates a front view of
sensor-network module 8' and FIG. 20 is a side view showing
sensor-network module 8' affixed to a switch plate 21 on wall 22
adjacent to electrical box 23. Such a configuration is typical of a
standard wall mounted light switch. FIG. 21 shows the specific
internal workings of the sensor-network module 8' embodiment. In
this embodiment, network interface 12 includes an AC modem 1201. AC
modem 1201 is connected to inductive coupler 1202, which also
serves as power source 38. Inductive coupler 1202 may be any of a
number of devices capable of exchanging electrical energy and
communication signals by inductive means. This allows
sensor-network module 8' to provide all the capabilities of the
embodiment shown in FIG. 11.
OPERATION
[0099] FIG. 22 illustrates an example of the operation of a
plurality of flow control devices 5a, 5b, 5c in operation while
environmental control system 100 is in the on state. FIG. 23
illustrates the operation as steps in flow chart form. Each flow
control device 5a, 5b, 5c receives its respective environmental
status table 102a, 102b, 102c from their respective sensors 8a, 8b,
8c representing the local environmental conditions of their
respective rooms 121, 122, 123. In this example, a user in room 121
desires a different environmental condition, such as temperature,
than a user in either room 122 or room 123. In order to accomplish
this goal, different amounts of air flow need to be delivered to
the respective rooms, differing from that which would normally have
been delivered by environmental control unit 100 through ductwork
2.
[0100] In this example of operation, respective user preference
sensors 58 (FIG. 10) with sensors 8a, 8b, and 8c are set to the
desired environmental conditions for each respective room. Central
controller 80 signals environmental control unit 100 to transition
to the on state, step S1 of FIG. 23. Environmental control unit 100
causes air flow 1 to flow through ductwork 2, 2a, 2b, and 2c and
into flow control devices 5a, 5b, and 5c. In room 121, air flow 1
causes rotating structure 10 (shown in FIG. 4) of flow control
device 5a to rotate, step S2, causes generation of electrical
energy by motor-dynamo 31 (shown in FIG. 4) which is detected by
the microcontroller 50, step S3, by way of analog to digital
converter 52 and motor dynamo bus 33. Microcontroller 50 requests,
by way of communications device 40, the environmental status table
102 from sensor 8a in steps S4 and S5. Microcontroller 50
constructs operational status table 101 (as will be detailed in
FIG. 25), containing data reflecting the environmental conditions
of room 121 and internal data reflecting the operation of flow
control device 5a, for instance, the temperature within flow
restriction device 5a as measured by temperature sensor 54, step
S6. Microcontroller 50 sends the operational status table 101 a to
flow control devices 5b and 5c by way of communications driver 41
and communications device 40, step S7. In a like manner, flow
control devices 5b and 5c also transmit their respective
operational status tables to the other flow control devices.
Microcontroller 50 of flow control device 5a receives, by way of
communications device 40, operational table 101b of flow control
device 5b, step S8. Microcontroller 50 adds the information
contained in operational table 101b to its operational table 101a.
In a like manner, microcontroller 50 of flow control device 5a
receives, by way of communications device 40, operational table
101c of flow control device 5c. Microcontroller 50 adds the
information contained in operational table 101c to its operational
table 101a, step S9.
[0101] In this manner, each respective flow control device 5a, 5b,
5c now has complete knowledge of the operational status parameters
of all flow control devices. Using this information contained in
operational status table 101, each flow control device uses
microcontroller 50, acting upon its program instructions, to
determine the appropriate flow restriction response it should
implement, step S10. Continuing with the current example of
operation, for each flow restriction device, operational status
table 101 includes the actual temperature, requested temperature,
and flow restriction device temperature as measured by temperature
sensor 54.
[0102] By restricting air flow in one or more flow control devices,
more air flow is available to other ducts in the system. This
provides the ability to use flow restriction means to boost the
amount of air flow into certain rooms. A boost in the amount of air
flow serves to decrease the time needed to bring those rooms to
their respective desired environmental condition.
[0103] Continuing with this operational example, program
instructions use the actual temperature, requested temperature, and
flow restriction device temperature to determine whether to invoke
a means to restrict flow. Two conditions may exist. In the first
condition, if the actual temperature is greater than the requested
temperature and the flow restriction device temperature is less
than the actual temperature, or the actual temperature is less than
the requested temperature and the flow restriction device
temperature is greater than the actual temperature, then
microcontroller 50 calculates the amount of flow restriction to
invoke. This amount of flow restriction to invoke may be zero to
maximum possible flow restriction and is calculated according to
the program instructions.
[0104] There are a great variety of ways to calculate the amount of
flow restriction to invoke. In one typical embodiment, an inverse
linear relationship between the difference between the actual
temperature and the requested temperature (delta T) and the amount
of flow restriction to invoke can be used. More complex
calculations can be implemented. For example, piecewise linear
equations, linear optimization techniques, or continuous functions
may be applied.
[0105] In the second condition, if the actual temperature is less
than or equal to the requested temperature or the flow restriction
device temperature is greater than or equal to the actual
temperature, and the actual temperature is greater than or equal to
the requested temperature or the flow restriction device
temperature is less than or equal to the actual temperature, then
microcontroller 50 sets the amount of flow restriction to invoke to
the maximum possible flow restriction. In this example, these same
program instructions apply without regard to whether environmental
control unit 100 is heating or cooling.
[0106] As shown in FIG. 4, microcontroller 50 signals flow
restriction control 62, step S11. Flow restriction control 62
actuates stepper motor 64. Stepper motor 64 closes petal valve 60.
Depending upon the embodiment of the flow restriction device
installed, other flow restriction means are possible. If the flow
control device comprises both a petal valve and rotating structure,
or dual rotating structures, then the multiple devices can be used
additively to create additional restriction. Microcontroller 50 may
signal load control 36 to extract electrical energy from
motor-dynamo bus 33, which in turn causes motor-dynamo 31 to use
rotating structure 10 to extract electrical energy from the kinetic
energy of the air flow. The extraction of electrical energy from
the kinetic energy causes a reduced flow to the room. Load control
36 absorbs the collected electrical energy, typically by using a
resistive load.
[0107] In the event microcontroller 50 detects depletion of power
storage 30 by way of power bus 39 and analog to digital converter
52, then microcontroller 50 invokes means to replenish power by
signaling power manager 35 to draw electrical energy from
motor-dynamo bus 33, which in turn causes motor-dynamo 31 to use
rotating structure 10 to extract electrical energy from the kinetic
energy of the air flow. Power manager 35, in turn, deposits the
electrical energy to power storage 30. The extraction of electrical
energy from the kinetic energy also causes reduced flow to the
room. Typically, replenishment of power storage 30 has precedence
over the amount of flow restriction to invoke.
[0108] At this point, the system is fully functional and the flow
control devices may continue unchanged until the environmental
control unit returns to the off state, causing an improved
performance of the overall system, step S12. The entire process,
steps S1 to S12, repeats itself when the environmental control unit
returns to the on state.
ADAPTIVE EMBODIMENT
[0109] A greater measure of improvement of the performance of the
flow control devices can be implemented by adding adaptive control
means. If adaptive means are turned on, step S13, the program
instructions are allowed to repeat. At appropriate intervals, step
S14, microcontroller 50 of flow control device 5a repeats the above
described sequence, steps S4 to S13. The intervals between
repetitions may be governed by several means, including changes in
environmental status table 102, operational status table 101, timed
interval, delay interval, and updated operational status tables
from other flow control devices. Microcontroller 50 requests, by
way of communications device 40, environmental status table 102
from sensor 8a. Microcontroller 50 sends operational status table
101a to flow control devices 5b and 5c by way of communications
driver 41 and communications device 40. Microcontroller 50 updates
operational status table 101a, containing data reflecting the
environmental conditions of room 121 and internal data reflecting
the operation of flow control device 5a. Microcontroller 50 sends
operational status table 101a to flow control devices 5b and 5c by
way of communications driver 41 and communications device 40. In a
like manner, flow control devices 5b and 5c also transmit their
respective operational status tables to the other flow control
devices. Microcontroller 50 of flow control device 5a receives, by
way of communications device 40, operational table 101b of flow
control device 5b. Microcontroller 51 updates the information
contained in operational table 101b to its operational table 101a.
In a like manner, microcontroller 50 of flow control device 5a
receives, by way of communications device 40, operational table
101c of flow control device 5c. Microcontroller 50 uses the
information contained in operational table 101c to update its
operational table 101a.
[0110] In this manner, each respective flow control device 5a, 5b,
5c again has complete knowledge of the operational status
parameters of all flow control devices. These parameters may have
changed due to changes in the amount of flow restriction at each
flow control device. Once again, using this information contained
in operational status table 101, each flow control device uses
microcontroller 50, acting upon its program instructions, to
determine the appropriate flow restriction response it should now
implement. By repeating the above described sequence at appropriate
intervals, flow control devices 5a, 5b, 5c are able to adapt the
amount of flow restriction to changes in user requests,
environmental conditions, and unequal distribution of air flow in
the ducts. The program instructions themselves may be adaptively
modified, which effectuates a complex adaptive system.
[0111] The adaptive process is repeated as long as environmental
control system 100 is in the on state.
[0112] In this example, only three parameters from operational
status table 101 have been used by the program instructions,
namely: actual temperature, requested temperature, and flow
restriction device temperature. The relative differences in these
parameters between the flow control devices provide the information
required to determine the amount of flow restriction to invoke.
Other embodiments of these adaptive means are possible by using
other environmental and operational parameters as well as more
sophisticated program instructions. They include, but are not
limited to: humidity, proximity, priority, air duct pressure,
historical observations, time, day, date, and environmental control
unit status.
[0113] In a further operational example, room 123 is closer to
environmental control system 100, receiving more air flow from
ductwork 2 than room 121, due to shorter distance and therefore
less resistance to air flow in ductwork 2. Room 123 being closer to
environmental control system 100 will typically receive greater air
flow. It is likely that room 123, which contains central controller
80, will reach the desired temperature set on central controller 80
and shut environmental control unit 100 to the off state well
before room 121 reaches the same temperature. This will occur even
if rooms 121, 122, and 123 have similar heat sources and sinks.
Flow control devices 5a, 5b, 5c adapt to this situation by
dynamically adjusting their respective flow restriction using the
parameters available in operating status table 101.
OPERATION DURING FAILURE
[0114] The present invention eliminates the need for a central
controller or central processing unit to achieve overall
environmental control goals. When one or
[0115] more flow control devices 5 fail, operational status table
101 will not have parameter updates from those failed flow control
devices. In a similar failure situation,
[0116] communications means between flow control devices may
partially or totally fail resulting in operational status table 101
not having parameter updates from those flow control devices that
are not in communication. The functional flow control devices still
continue to operate independently or partially independently
towards achieving the overall environmental control goals. Flow
restriction decisions will be made from the remaining information
available. If necessary, a single functioning flow control device
may continue to operate to meet environmental control goals for the
room it serves. Therefore, the present invention is not subject to
the risk complete system failure caused by a failed central
controller, central processing unit, or failed communications
network.
OPERATIONAL STATUS TABLE EMBODIMENT
[0117] Operational control table 101 includes the parameters
necessary to execute the previously described embodiments, such as
temperature, requested temperature, and flow restriction device
temperature. Operational control table 101 also includes parameters
which enable more advanced adaptive program instructions. For
example, by tracking whether a given room reaches its goal during
an on state cycle of the environmental control unit, the parameters
associated with the inverse linear relationship between the
difference between the actual temperature and the requested
temperature .DELTA.T and the amount of flow restriction can be
adjusted.
[0118] In another example, in order to protect the environmental
control unit from damage due to excessive restriction of flow, the
duct air pressure upstream of the flow control device may be
calculated knowing the temperature and the rotation rate of the
rotating structure, as deduced from the potential voltage presented
by motor- dynamo upon the motor-dynamo bus. Operational status
table 101 makes the duct air pressure at each flow control device
available to all flow control devices. Each flow control device may
review these duct air pressures and adapt its flow restriction in
accordance with these duct air pressures.
[0119] In any particular installation, users have different needs
for the various rooms. This can be expressed as a priority
parameter. For example, a room may be unused for a period of time.
A user assigns a lower priority to those rooms which are not in use
to allow greater operating latitude to those flow control devices
which are serving these other rooms which are in use.
Alternatively, a proximity sensor detects the use or non use of the
room which may be used by the program instructions to appropriately
control the environmental conditions of that room.
[0120] FIG. 24 illustrates a typical embodiment of operational
status table 101. Operational status table 101 is structured so as
to contain one or more data elements for each flow control device
in the system. Operational status table 101 may be constructed as a
collection of data objects, one data object for each flow control
device. Each object of operational status table 101 may include a
variety of data elements, which may also be called parameters.
Classes of parameters include Energy parameters, Valve parameters,
Environmental Control Unit Status Parameters, Flow Control Device
Parameters, and Environmental Status Parameters.
[0121] Energy Parameters relate to the status of rotating structure
10 and the energy state of flow control device 5. The
microcontroller of the flow control device adapts the program
instructions to account for the values of these parameters.
Examples of energy parameters include: charging, battery charge,
and flow control. The charging parameter is a flag that the
rotating structure is currently supplying power to recharge the
battery. If the flag is set, this signals that the flow control
device will be limited in its ability to restrict flow. Maintaining
power source charge is almost always given precedence over other
functions of the rotating structure in instances where a battery is
used for the power source. The battery charge parameter is a
numeric value which represents the current charge level of the
power source. This allows the various systems to estimate the time
remaining to full charge, at which time more restriction will be
available to the system. In the event a wired source is used for
the power source, battery charge is set to maximum. The "flow
control" parameter is a multi-valued parameter which describes the
current use of the rotating structures in the flow control device
for activities other than charging and the magnitude of those
activities. In the event of multiple rotating structures, the
variables have indexes which allow the program instructions to
access the values sequentially, i.e. Rotation (1), Rotation (2).
Rotation (n)=(x, magnitude) where n is the index to the specific
structure and x is a numeric flag where:
[0122] 1=Boost mode
[0123] 2=Restriction mode
[0124] 3=Reverse flow mode
[0125] Flow control devices calculate total restriction any device
that is producing in its leg of the system as well as the overall
effects of that restriction on other legs of the system using the
flow control flag and current position data described below.
[0126] Valve Parameters relate to the status of any passive
restriction used in the flow control device. An example of a valve
parameter is the "current position" parameter in the event the flow
control device is equipped with a petal valve or other passive flow
restriction device, the "current position" parameter represents the
current amount of restriction which is being provided. In many
embodiments this variable is calibrated to actual flow restriction
percentage. Flow control devices assess the full system response of
their individual and collective actions based on the value of the
"current position" and the "flow control" parameter.
[0127] Environmental Control Unit Status Parameters relate to the
status of any environmental control units in the system. Examples
of Environmental Control Unit Status Parameters include: On_off,
Heat_cooldry, "presence of central controller," and "recent cycle
length." The On off parameter is a flag which represents the
current state of the environmental control unit. The flow control
unit switches operation instructions based on the value of this
flag. The Heat_cool_dry parameter is multi-value flag which
represents the current mode of the environmental control unit. In
most installations this flag represents whether the environmental
control unit is supplying air which is warmer, cooler, wetter, or
drier than the room being serviced. In certain operating scenarios,
flow control units alter their actions based on the value of this
flag. The flag is set by the flow control device by comparing the
values of its internal sensors and the corresponding sensor 8 in
the room being serviced. The "presence of central controller"
parameter is a single value flag which is used to alert the flow
control devices in the installation of which room or rooms have
central controllers. This enables such rooms to be treated
differently. In one embodiment for example, rooms which have the
central controller will purposely delay satisfying their user
environmental preference to allow other rooms in the system time to
reach their goals. In another example, in the case where the
environmental unit is in the off state, flow control devices push
air back through the duct system towards the central controller
using the value of this flag. The "recent cycle length" parameter
contains the length of time that the environmental control unit
remained in the on state during the last several on states. The
flow control devices use this parameter to predict the total
available air conditioning that may be provided during the next on
state in order to improve flow restriction performance.
[0128] Flow Control Device Parameters relate to internal
measurements and calculations taken by the flow control device.
Examples of Flow Control Device Parameters include: type of device,
duct temperature, duct pressure, historical rate of change table,
and historical performance table. The type of device parameter is a
multi-valued parameter which represents the type and capabilities
of a specific flow control device. This may include the version or
model number of the physical device, the version number of the
program instructions, and the adaptive code mode being used. A flow
control device may have one or more types of restriction devices or
rotating structures, which are represented by the values of this
parameter. Flow control devices calculate the range of possible
responses to a given situation by using this flag. The duct
temperature and duct pressure is a dual-valued parameter which
contains the current temperature in the flow control device and the
upstream pressure in the ductwork. The flow control device
calculates the upstream pressure using a measured energy output of
the rotational structure by way of the motor-dynamo, motor dynamo
bus, and analog to digital converter, and the air temperature to
correct for density effects. This parameter is important in
preventing the collective group of flow control devices from overly
restricting flow in the ductwork and causing damage to the
environmental control unit. The historical rate of change table is
an object which is used to store parameters relating to how rapidly
the environmental changes occurred in the room due to operating
parameters of the flow control device. The program instructions use
this data to adapt the operating strategy for the device in a
specific room. This provides a means for devices to sense the
relative differences in the rooms serviced and adjust operating
parameters appropriately. The historical performance table is an
object which is used to store parameters relating to how well the
flow control device was able to satisfy past user environmental
requests. Using knowledge of past performance the flow control
device alters its program instructions. This object captures
changes in heat sources and sinks in a given room such as the
effect of afternoon sun. Although a given flow control device may
have had no problem reaching user environmental requests in the
morning, the added influx of heat will cause the flow control
device to lag in the afternoon, and the program instructions detect
this change through this object and response accordingly.
[0129] Environmental Status Parameters relate to data received from
environmental status table 102. Examples of Environmental Status
Parameters include: requested environmental conditions, actual
environmental conditions, and assigned device priority. The
requested environmental conditions parameter contains the requested
environmental parameters set by the user. This is used by the flow
control devices as a primary input to determine operating
parameters using program instructions. An example is the requested
temperature. The actual environmental conditions parameter contains
various readings as measured by sensor 8, for example data gathered
from room temperature sensor 55, room proximity sensor 56, or room
humidity sensor 57. Using program instructions, the flow control
device compares this parameter to the requested environmental
conditions to determine action. The assigned device priority
parameter captures the user's planned use of a given room. The flow
control device selects the appropriate action using this variable.
In a typical embodiment this parameter would have values such
as:
[0130] 1=Heavy use room
[0131] 2=Occasional use room
[0132] 3=Timed use room
[0133] 4=Unused room
BOOST EMBODIMENT
[0134] In the preceding embodiments, flow control devices restricte
air flow. In an alternative embodiment, rotating structure 10 is
operated in such a manner as to boost the air flow through the flow
control device. Microcontroller 50 signals power manager 35 to
transfer electrical energy from power bus 39 to motor-dynamo bus
33, causing rotating structure 10 to accelerate propulsion of air
into the room. Program instructions may account for boost
capability by treating boost capability as a negative amount of
flow restriction.
REVERSING FLOW EMBODIMENT
[0135] In another embodiment, the flow control devices operate
during periods when the environmental control unit is in the off
state. Referring to FIG. 24, in this example of operation, room 121
is not at the desired environmental condition, while at the same
time room 123 is at its desired environmental condition. Central
controller 80 does not signal environmental control unit 100 to
transition to the on state. Flow control device 5a, serving room
121, activates rotating structure 10 in the reverse direction,
thereby reverse flowing air through ducts 2 and 2a. Air flow 1
exhausts into duct 2c, entering room 123, and altering the
environmental condition of room 123. In the case of room 121 being
too hot, the withdrawal of air from room 121 serves to cause cooler
air from other locations to enter room 121. Additionally, air from
duct 2, which is typically too hot, enters room 123 causing the
environmental condition of room 123 to no longer be at its desired
environmental condition. Central controller 80 thereby signals
environmental control unit 100 to transition to the on state.
[0136] Flow control device 5b, in room 122, detects air flow caused
by the operation of flow control device 5a. From information
received in operational status table 101, flow control device 5b
joins in by restricting or even reversing air flow. Flow control
device 5c, in room 123, also detects air flow caused by the
operation of flow control devices 5a and 5b. From information
received in operational table 101, flow control device 5c joins in
by boosting flow into room 123. In this way, the flow control
devices act cooperatively to cause central controller 80 to signal
environmental control unit 100 to the on state.
[0137] Even if flow control device 5b does not activate upon
detection of air flow, the sending of operational status table 101
from flow control device 5a serves to activate flow control device
5b.
[0138] Although the description above contains many specifications,
these should not be construed as limiting the scope of the
invention but as merely providing illustrations of some of the
presently preferred embodiments of this present invention. Persons
skilled in the art will understand that the method and apparatus
described herein may be practiced, including but not limited to,
the embodiments described. Further, it should be understood that
the invention is not to be unduly limited to the foregoing which
has been set forth for illustrative purposes. Various modifications
and alternatives will be apparent to those skilled in the art
without departing from the true scope of the invention, as defined
in the following claims. While there has been illustrated and
described particular embodiments of the present invention, it will
be appreciated that numerous changes and modifications will occur
to those skilled in the art, and it is intended in the appended
claims to cover those changes and modifications which fall within
the true spirit and scope of the present invention.
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