US20120100797A1 - Remote zone balancing damper and air flow sensor system - Google Patents
Remote zone balancing damper and air flow sensor system Download PDFInfo
- Publication number
- US20120100797A1 US20120100797A1 US12/925,562 US92556210A US2012100797A1 US 20120100797 A1 US20120100797 A1 US 20120100797A1 US 92556210 A US92556210 A US 92556210A US 2012100797 A1 US2012100797 A1 US 2012100797A1
- Authority
- US
- United States
- Prior art keywords
- air flow
- damper
- flow sensor
- actuator
- remote terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
- G01F15/063—Indicating or recording devices for remote indication using electrical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Definitions
- the invention relates to a remote zone balancing damper and air flow sensor system, and more particularly, to a remote zone balancing damper and air flow sensor system having a detachable controller for calculating an air flow rate and for powering a damper actuator.
- Air-handling systems have traditionally been used to condition buildings or rooms.
- An air-handling system can include a system that includes components designed to work together in order to condition air as part of the primary system for ventilation of structures.
- the air-handling system may contain components such as cooling coils, heating coils, filters, humidifiers, fans, sound attenuators, controls, and other devices functioning to meet the needs of the structures.
- U.S. Pat. No. 5,450,999 (1995) discloses a controller for a variable air volume terminal of a variable air volume air conditioning system which comprises a temperature sensing circuitry for generating a temperature process value, a setpoint determining circuitry for establishing a temperature setpoint, an airflow signal circuitry for generating an airflow setpoint in response to the temperature process value and the temperature setpoint.
- the damper control circuitry comprises a fuzzy logic control mechanism for implementing a set of fuzzy logic rule-based instructions in generating the damper motor operating signal.
- the primary aspect of the invention is to provide a remote zone balancing damper and air flow sensor system having a detachable controller for calculating an air flow rate and for powering a damper actuator.
- the invention comprises a remote zone balancing damper and air flow sensor system comprising a differential pressure air flow sensor, a damper having an actuator, a remote terminal connected to the air flow sensor and the actuator, the remote terminal disposed a predetermined distance from the duct, the air flow sensor and damper mounted in a duct, and a detachable controller that is connectable to the remote terminal, the detachable controller configured to receive a signal from the remote terminal and to provide power to the actuator and thereby position the damper according to the calculated air flow.
- FIG. 1 is a schematic diagram of the system.
- FIG. 2 is a section view A-A of the air flow sensor and damper assembly in FIG. 3 .
- FIG. 3 is a front view of the air flow sensor and damper assembly.
- FIG. 4 is a perspective view of the air flow sensor and damper assembly.
- FIG. 5 is a perspective view of the air flow sensor and damper assembly.
- FIG. 6 is a side view of an alternate damper actuator.
- FIG. 1 is a schematic diagram of the system.
- the system comprises the air flow sensor and damper assembly 100 , the wall terminal 200 , and the hand held control 300 .
- the air flow sensor and damper assembly 100 comprises an air flow sensor 120 which is installed within a duct 110 .
- Air flow sensor 120 measures a differential pressure as is known in the art.
- a damper 140 is also disposed within duct 110 .
- Damper 140 is actuated by a known actuator 141 .
- Actuator 141 may comprise any suitable actuator known in the art, including an electric, pneumatic or manual device.
- Actuator 141 and air flow sensor 120 are connected to wall terminal 200 .
- Actuator 141 is connected to the wall terminal 200 by control cable 142 .
- Air flow sensor 120 is connected to the wall terminal by tubes 131 , 132 at fittings 1310 and 1320 .
- Wall terminal 200 comprises an RJ11 connector 3100 , a total pressure fitting 1320 and a static pressure fitting 1310 .
- the hand held controller 300 comprises a microprocessor 210 an LCD screen 220 , a pressure transducer 230 , a 9v battery terminal 240 , a PC terminal block 250 and a FCC connection receptacle 260 .
- the LCD screen can be used to display information relating to air flow.
- PC terminal block 250 is used to connect the controller to the actuator.
- Pressure transducer 230 coverts the differential pressure received from the air flow sensor 120 into an electrical signal.
- Microprocessor 210 includes software for calculating an air flow rate in feet per minute based upon the signal received from the pressure transducer 230 . Controller 300 also provides power to the actuator 141 by which the damper 140 is positioned.
- a user will select the proper position for the damper based upon the desired airflow rate for the duct in which the system is located. If the desired airflow rate matches the air flow rate calculated from the signal, then the user does not reposition the damper. If the desired air flow rate does not match the desired air flow rate, then the user will use the controller to send a signal to the remote terminal and thereby to the actuator to move the damper until the desired air flow rate is achieved.
- the damper can be “parked” in any position between 100% open and 100% closed.
- the power used to energize the actuator is onboard the controller 300 .
- the preferred power source is a 9 volt battery, however, any battery or combination of batteries known in the art may be used with equal success.
- Hand held controller 300 comprises a display 301 for displaying air flow information in cubic feet per minute. Controller 300 also comprises keys 302 whereby a user can input information into the controller or to change or manipulate resident information.
- the hand held controller 300 can be connected to the wall terminal 200 by a cable 310 used to engage the RJ11 port 3100 .
- Cable 310 comprises a known RJ11 cable.
- FIG. 2 is a section view A-A of the air flow sensor and damper assembly in FIG. 3 .
- Air flow sensor 120 is disposed upstream of the damper 140 in duct 110 .
- damper 140 comprises a single blade, however, a damper comprising two or more blades may be used as well.
- FIG. 3 is a front view of the air flow sensor and damper assembly.
- the air flow sensor 120 comprises two tubes that cross at a right angle, centered in duct 110 . Each tube has a single hole 122 on the upstream side of each tube. Pressure tubes 131 , 132 , extend from sensor 120 through duct 110 .
- Damper 140 comprises a shaft 145 to which a damper blade 146 is attached.
- Actuator 141 is attached to shaft 145 .
- FIG. 4 is a perspective view of the air flow sensor and damper assembly. Air flow sensor is disposed upstream of the damper blade 140 . Actuator 141 is mounted to the exterior of duct 110 .
- FIG. 5 is a perspective view of the air flow sensor and damper assembly. Pressure tubes 131 , 132 protrude from duct 110 . Damper 140 meters the flow of air through duct 110 .
- FIG. 6 is a side view of an alternate damper actuator.
- a cable drive worm gear actuator 150 , 151 , 152 is shown.
- Worm gear 150 is connected to the damper.
- Cable 151 is connected between the worm gear 150 and the remote driver 152 .
- a user operates driver 152 which turns worm gear 150 , thereby opening or closing the damper.
- An example device is RototwistTM 200 worm gear system.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
- Fluid-Pressure Circuits (AREA)
- Flow Control (AREA)
Abstract
Description
- The invention relates to a remote zone balancing damper and air flow sensor system, and more particularly, to a remote zone balancing damper and air flow sensor system having a detachable controller for calculating an air flow rate and for powering a damper actuator.
- Air-handling systems have traditionally been used to condition buildings or rooms. An air-handling system can include a system that includes components designed to work together in order to condition air as part of the primary system for ventilation of structures. The air-handling system may contain components such as cooling coils, heating coils, filters, humidifiers, fans, sound attenuators, controls, and other devices functioning to meet the needs of the structures.
- Representative of the art is U.S. Pat. No. 5,450,999 (1995) which discloses a controller for a variable air volume terminal of a variable air volume air conditioning system which comprises a temperature sensing circuitry for generating a temperature process value, a setpoint determining circuitry for establishing a temperature setpoint, an airflow signal circuitry for generating an airflow setpoint in response to the temperature process value and the temperature setpoint. A flow sensing circuitry for generating a flow process value in response to a predetermined set of flow sensing inputs and damper control circuitry for generating a damper motor operation signal to control the damper motor in response to the flow process value and the airflow setpoint. The damper control circuitry comprises a fuzzy logic control mechanism for implementing a set of fuzzy logic rule-based instructions in generating the damper motor operating signal.
- What is needed is a remote zone balancing damper and air flow sensor system having a detachable controller for calculating an air flow rate and for powering a damper actuator. The present invention meets this need.
- The primary aspect of the invention is to provide a remote zone balancing damper and air flow sensor system having a detachable controller for calculating an air flow rate and for powering a damper actuator.
- Other aspects of the invention will be pointed out or made obvious by the following description of the invention and the accompanying drawings.
- The invention comprises a remote zone balancing damper and air flow sensor system comprising a differential pressure air flow sensor, a damper having an actuator, a remote terminal connected to the air flow sensor and the actuator, the remote terminal disposed a predetermined distance from the duct, the air flow sensor and damper mounted in a duct, and a detachable controller that is connectable to the remote terminal, the detachable controller configured to receive a signal from the remote terminal and to provide power to the actuator and thereby position the damper according to the calculated air flow.
- The accompanying drawings, which are incorporated in and form a part of the specification, illustrate preferred embodiments of the present invention, and together with a description, serve to explain the principles of the invention.
-
FIG. 1 is a schematic diagram of the system. -
FIG. 2 is a section view A-A of the air flow sensor and damper assembly inFIG. 3 . -
FIG. 3 is a front view of the air flow sensor and damper assembly. -
FIG. 4 is a perspective view of the air flow sensor and damper assembly. -
FIG. 5 is a perspective view of the air flow sensor and damper assembly. -
FIG. 6 is a side view of an alternate damper actuator. -
FIG. 1 is a schematic diagram of the system. The system comprises the air flow sensor anddamper assembly 100, thewall terminal 200, and the hand heldcontrol 300. - The air flow sensor and
damper assembly 100 comprises anair flow sensor 120 which is installed within aduct 110.Air flow sensor 120 measures a differential pressure as is known in the art. - A
damper 140 is also disposed withinduct 110. Damper 140 is actuated by a knownactuator 141.Actuator 141 may comprise any suitable actuator known in the art, including an electric, pneumatic or manual device. - Actuator 141 and
air flow sensor 120 are connected towall terminal 200.Actuator 141 is connected to thewall terminal 200 bycontrol cable 142.Air flow sensor 120 is connected to the wall terminal by 131, 132 attubes 1310 and 1320.fittings -
Wall terminal 200 comprises anRJ11 connector 3100, a total pressure fitting 1320 and astatic pressure fitting 1310. - The hand held
controller 300 comprises amicroprocessor 210 anLCD screen 220, apressure transducer 230, a9v battery terminal 240, aPC terminal block 250 and a FCCconnection receptacle 260. The LCD screen can be used to display information relating to air flow.PC terminal block 250 is used to connect the controller to the actuator.Pressure transducer 230 coverts the differential pressure received from theair flow sensor 120 into an electrical signal. -
Microprocessor 210 includes software for calculating an air flow rate in feet per minute based upon the signal received from thepressure transducer 230.Controller 300 also provides power to theactuator 141 by which thedamper 140 is positioned. - Using the controller, a user will select the proper position for the damper based upon the desired airflow rate for the duct in which the system is located. If the desired airflow rate matches the air flow rate calculated from the signal, then the user does not reposition the damper. If the desired air flow rate does not match the desired air flow rate, then the user will use the controller to send a signal to the remote terminal and thereby to the actuator to move the damper until the desired air flow rate is achieved. The damper can be “parked” in any position between 100% open and 100% closed.
- The power used to energize the actuator is onboard the
controller 300. The preferred power source is a 9 volt battery, however, any battery or combination of batteries known in the art may be used with equal success. - Hand held
controller 300 comprises adisplay 301 for displaying air flow information in cubic feet per minute.Controller 300 also compriseskeys 302 whereby a user can input information into the controller or to change or manipulate resident information. - The hand held
controller 300 can be connected to thewall terminal 200 by acable 310 used to engage theRJ11 port 3100. Cable 310 comprises a known RJ11 cable. -
FIG. 2 is a section view A-A of the air flow sensor and damper assembly inFIG. 3 .Air flow sensor 120 is disposed upstream of thedamper 140 induct 110. In thisembodiment damper 140 comprises a single blade, however, a damper comprising two or more blades may be used as well. -
FIG. 3 is a front view of the air flow sensor and damper assembly. Theair flow sensor 120 comprises two tubes that cross at a right angle, centered induct 110. Each tube has asingle hole 122 on the upstream side of each tube. 131, 132, extend fromPressure tubes sensor 120 throughduct 110. -
Damper 140 comprises ashaft 145 to which adamper blade 146 is attached.Actuator 141 is attached toshaft 145. -
FIG. 4 is a perspective view of the air flow sensor and damper assembly. Air flow sensor is disposed upstream of thedamper blade 140.Actuator 141 is mounted to the exterior ofduct 110. -
FIG. 5 is a perspective view of the air flow sensor and damper assembly. 131, 132 protrude fromPressure tubes duct 110.Damper 140 meters the flow of air throughduct 110. -
FIG. 6 is a side view of an alternate damper actuator. A cable drive 150, 151, 152 is shown.worm gear actuator Worm gear 150 is connected to the damper.Cable 151 is connected between theworm gear 150 and theremote driver 152. A user operatesdriver 152 which turnsworm gear 150, thereby opening or closing the damper. An example device isRototwist™ 200 worm gear system. - Although a form of the invention has been described herein, it will be obvious to those skilled in the art that variations may be made in the construction and relation of parts without departing from the spirit and scope of the invention described herein.
Claims (5)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/925,562 US20120100797A1 (en) | 2010-10-25 | 2010-10-25 | Remote zone balancing damper and air flow sensor system |
| CA2755031A CA2755031A1 (en) | 2010-10-25 | 2011-10-13 | Remote zone balancing damper and air flow sensor system |
| MX2011011235A MX2011011235A (en) | 2010-10-25 | 2011-10-24 | Remote zone balancing damper and air flow sensor system. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/925,562 US20120100797A1 (en) | 2010-10-25 | 2010-10-25 | Remote zone balancing damper and air flow sensor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20120100797A1 true US20120100797A1 (en) | 2012-04-26 |
Family
ID=45973422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12/925,562 Abandoned US20120100797A1 (en) | 2010-10-25 | 2010-10-25 | Remote zone balancing damper and air flow sensor system |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20120100797A1 (en) |
| CA (1) | CA2755031A1 (en) |
| MX (1) | MX2011011235A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130337736A1 (en) * | 2012-06-14 | 2013-12-19 | Honeywell International Inc. | Hvac damper system |
| US20170176043A1 (en) * | 2015-12-21 | 2017-06-22 | Dwyer Instruments, Inc. | System, method, and apparatus for balancing an hvac system |
| WO2018164682A1 (en) * | 2017-03-08 | 2018-09-13 | Arzel Zoning Technology, Inc. | System and method for wireless environmental zone control with positioning feedback |
| US10119721B2 (en) | 2012-06-14 | 2018-11-06 | Honeywell International Inc. | Standoff for use with an insulated HVAC duct |
| US10295215B2 (en) | 2013-12-18 | 2019-05-21 | Ademco Inc. | HVAC actuator with range adjustment |
| EP3611437A1 (en) * | 2018-08-13 | 2020-02-19 | CH Vent AB | Method and system for balancing a ventilation system |
| US10697554B2 (en) | 2012-06-14 | 2020-06-30 | Ademco Inc. | Spring loaded HVAC damper |
| US10941960B2 (en) | 2013-12-18 | 2021-03-09 | Ademco Inc. | HVAC actuator with position indicator |
| US11280513B2 (en) * | 2017-07-31 | 2022-03-22 | Ilmastointimittaus Lind Oy | Arrangement and method for determination of adjustment parameters of an HVAC system |
| WO2025036969A1 (en) * | 2023-08-15 | 2025-02-20 | Belimo Holding Ag | Drive unit for a damper to control a flow of gas in a duct |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5970801A (en) * | 1997-12-30 | 1999-10-26 | Bear Medical Systems, Inc. | Variable orifice flow sensor |
| US6364211B1 (en) * | 2000-08-30 | 2002-04-02 | Saleh A. Saleh | Wireless damper and duct fan system |
| US6659359B2 (en) * | 2002-02-19 | 2003-12-09 | Young-Yeal Kwak | Grille controlling apparatus for indoor ventilator |
| US6991177B2 (en) * | 2004-02-06 | 2006-01-31 | Fred George | Multi-valve damper for controlling airflow and method for controlling airflow |
| US7258280B2 (en) * | 2004-04-13 | 2007-08-21 | Tuckernuck Technologies Llc | Damper control in space heating and cooling |
| US20080009237A1 (en) * | 2006-07-05 | 2008-01-10 | Mouxiong Wu | Air vent cover controller & method |
| US7344089B1 (en) * | 2003-03-24 | 2008-03-18 | Sutterfield Bill R | Wireless air-volume damper control system |
| US20090181611A1 (en) * | 2007-10-12 | 2009-07-16 | Metropolitan Air Technology | Motorized gear and coupling system |
-
2010
- 2010-10-25 US US12/925,562 patent/US20120100797A1/en not_active Abandoned
-
2011
- 2011-10-13 CA CA2755031A patent/CA2755031A1/en not_active Abandoned
- 2011-10-24 MX MX2011011235A patent/MX2011011235A/en not_active Application Discontinuation
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5970801A (en) * | 1997-12-30 | 1999-10-26 | Bear Medical Systems, Inc. | Variable orifice flow sensor |
| US6364211B1 (en) * | 2000-08-30 | 2002-04-02 | Saleh A. Saleh | Wireless damper and duct fan system |
| US6659359B2 (en) * | 2002-02-19 | 2003-12-09 | Young-Yeal Kwak | Grille controlling apparatus for indoor ventilator |
| US7344089B1 (en) * | 2003-03-24 | 2008-03-18 | Sutterfield Bill R | Wireless air-volume damper control system |
| US6991177B2 (en) * | 2004-02-06 | 2006-01-31 | Fred George | Multi-valve damper for controlling airflow and method for controlling airflow |
| US7258280B2 (en) * | 2004-04-13 | 2007-08-21 | Tuckernuck Technologies Llc | Damper control in space heating and cooling |
| US20080009237A1 (en) * | 2006-07-05 | 2008-01-10 | Mouxiong Wu | Air vent cover controller & method |
| US20090181611A1 (en) * | 2007-10-12 | 2009-07-16 | Metropolitan Air Technology | Motorized gear and coupling system |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130337736A1 (en) * | 2012-06-14 | 2013-12-19 | Honeywell International Inc. | Hvac damper system |
| US9664409B2 (en) * | 2012-06-14 | 2017-05-30 | Honeywell International Inc. | HVAC damper system |
| US10760816B2 (en) | 2012-06-14 | 2020-09-01 | Ademco Inc. | HVAC damper system |
| US10119721B2 (en) | 2012-06-14 | 2018-11-06 | Honeywell International Inc. | Standoff for use with an insulated HVAC duct |
| US10190799B2 (en) | 2012-06-14 | 2019-01-29 | Honeywell International Inc. | HVAC damper system |
| US10697554B2 (en) | 2012-06-14 | 2020-06-30 | Ademco Inc. | Spring loaded HVAC damper |
| US10941960B2 (en) | 2013-12-18 | 2021-03-09 | Ademco Inc. | HVAC actuator with position indicator |
| US10295215B2 (en) | 2013-12-18 | 2019-05-21 | Ademco Inc. | HVAC actuator with range adjustment |
| US10671098B2 (en) * | 2015-12-21 | 2020-06-02 | Dwyer Instruments, Inc. | System, method, and apparatus for balancing an HVAC system |
| US20170176043A1 (en) * | 2015-12-21 | 2017-06-22 | Dwyer Instruments, Inc. | System, method, and apparatus for balancing an hvac system |
| WO2018164682A1 (en) * | 2017-03-08 | 2018-09-13 | Arzel Zoning Technology, Inc. | System and method for wireless environmental zone control with positioning feedback |
| US11408623B2 (en) | 2017-03-08 | 2022-08-09 | Arzel Zoning Technology, Inc. | System and method for wireless environmental zone control with positioning feedback |
| US11906181B2 (en) | 2017-03-08 | 2024-02-20 | Arzel Zoning Technology, Inc. | System and method for wireless environmental zone control with positioning feedback |
| US11280513B2 (en) * | 2017-07-31 | 2022-03-22 | Ilmastointimittaus Lind Oy | Arrangement and method for determination of adjustment parameters of an HVAC system |
| EP3611437A1 (en) * | 2018-08-13 | 2020-02-19 | CH Vent AB | Method and system for balancing a ventilation system |
| WO2025036969A1 (en) * | 2023-08-15 | 2025-02-20 | Belimo Holding Ag | Drive unit for a damper to control a flow of gas in a duct |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2755031A1 (en) | 2012-04-25 |
| MX2011011235A (en) | 2012-04-24 |
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