Low-power wireless inflatable bladder damper for forced air heating, ventilation, and air conditioning systems

• US 7,302,959 B2
• Filed: 09/01/2004
• Issued: 12/04/2007
• Est. Priority Date: 09/01/2004
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Gonia, Patrick S.
• Primary Examiner(s): Krishnamurthy; Ramesh
• Application Number:
  US10/933,148
• Publication Number:
  US 20060042695A1
• Time in Patent Office: 1,189 Days
• Field of Search: 137/12, 137/14, 137/487.5, 251/61, 251/61.1, 92/92, 236/49.1, 236/49.2, 236/49.3, 236/49.4, 236/51, 454/257, 454/258, 454/333
• US Class Current: 137/2
• CPC Class Codes: B60H 1/00664 Construction or arrangement of damper doors control systems or circuits for damper doors B60H1/00835
• CPC Class Codes: B60H 1/00857 characterised by the means connecting the initiating means, e.g. control lever, to the damper door
• CPC Class Codes: F24F 11/75 for maintaining constant air flow rate or air velocity
• CPC Class Codes: F24F 2013/087 using inflatable bellows
• CPC Class Codes: Y10T 137/0324 With control of flow by a condition or characteristic of a fluid
• CPC Class Codes: Y10T 137/0396 Involving pressure control
• CPC Class Codes: Y10T 137/7761 Electrically actuated valve

Abstract

A low-power, wireless, inflatable bladder damper device for controlling the flow of air through an airflow channel, and a method of operation for the same. Rather than requiring power supply and/or control wiring for operation of a wireless damper device, a low-power inflatable bladder damper device that requires no external wiring for operation can be used. A completely wireless damper device can reduce the cost of installation of damping devices in airflow channels, as well as the complexity of installation, while at the same time providing improved control of airflow throughout an airflow system.

Claims

1. A damper device for restricting airflow in an HVAC airflow channel, the damper device comprising:

an inflatable bladder having an inflation level, wherein the inflatable bladder is located in the HVAC airflow channel;

a valve coupled to the inflatable bladder;

a pump co-located with and coupled to the valve, wherein the pump and the valve adjust the inflation level of the inflatable bladder to restrict varying amounts of airflow in the airflow channel;

a wireless device for receiving control information; and

a self-contained power source for powering the valve, the pump, and the wireless device, wherein the damper device houses the valve, the pump, the wireless device, and the self-contained power source, and wherein the damper device is secured to the airflow channel.

2. The damper device of claim 1 wherein an increase in the inflation level of the inflatable bladder increases the restriction of air through the airflow channel caused by the inflatable bladder.

3. The damper device of claim 1 wherein a decrease in the inflation level of the inflatable bladder decreases the restriction of air through the airflow channel caused by the inflatable bladder.

4. The damper device of claim 1 wherein the inflation level may be increased by operation of the pump.

5. The damper device of claim 1 wherein the inflation level may be decreased by moving the valve to an at least partially open position.

6. The damper device of claim 5 wherein the inflation level may be further decreased by operation of the pump.

7. The damper device of claim 1 wherein in response to receiving a wireless signal, the inflation level of the inflatable bladder is adjusted.

8. The damper device of claim 1 wherein the inflatable bladder is fabricated from a rubberized material.

9. The damper device of claim 1 wherein the valve has a closed position requiring a first amount of power, and an open position requiring a relatively higher amount of power.

10. The damper device of claim 1 wherein the wireless signal device is further arranged to transmit wireless signals.

11. The damper device of claim 10 wherein the wireless device is further arranged to transmit damper operation information.

12. The damper device of claim 1 wherein the self-contained power source comprises at least one battery.

13. The damper device of claim 12 wherein the at least one battery comprises at least one AA battery.

14. The damper device of claim 1 further comprising at least one inflation sensor for determining the inflation level of the inflatable bladder.

15. The damper device of claim 14 wherein the at least one inflation sensor comprises a pressure sensor.

16. The damper device of claim 14 wherein the inflatable bladder has a maximum inflation level to prevent over-inflation.

17. The damper device of claim 14 wherein the inflatable bladder has a minimum inflation level to prevent unproductive damper operation.

18. The damper device of claim 1 wherein the damper can be installed in the airflow channel by inserting the inflatable bladder through a hole in the airflow channel.

19. The damper device of claim 1 wherein the damper device is used in an HVAC system for controlling airflow.

20. An airflow control system comprising:

a damper device comprising;

an inflatable bladder having an inflation level, wherein the inflatable bladder is located in an airflow channel;

a valve coupled to the inflatable bladder;

a pump co-located with and coupled to the valve, wherein the pump and the valve adjust the inflation level of the inflatable bladder to restrict varying amounts of airflow in the airflow channel;

a wireless device for receiving control information;

a self-contained power source for powering the valve, the pump, and the wireless device, wherein the damper device houses the valve, the pump, the wireless device, and the self-contained power source, and wherein the damper device is secured to the airflow channel;

a programmable device for programming a desired level of at least one air property measure; and

a sensing device comprising;

at least one sensor for measuring at least one air property; and

a wireless transmitter for sending control information to the wireless device for use in controlling the damper device;

wherein the airflow channel is an HVAC air duct for heating or cooling a room.

21. The airflow control system of claim 20 wherein the programmable device and the sensing device are integrated into a single control apparatus.

22. The airflow control system of claim 20 wherein the damper device and the programmable device are integrated into a single apparatus.

23. The air flow control system of claim 20 wherein the wireless device is further arranged to transmit damper operation information and the wireless transmitter further comprises a wireless receiver for receiving the damper operation information from the wireless device.

24. The airflow control system of claim 20 wherein the wireless transmitter is arranged to transmit specifically designated coded wireless signals to be acted upon only by a damper device arranged to receive the specifically designated wireless signals.

25. The airflow control system of claim 24 wherein the designation is coded identifier information carried as part of the specifically designated coded wireless signals.

26. The airflow control system of claim 24 wherein the designation is a frequency of the specifically designated wireless signals.

27. The airflow control system of claim 20 wherein the at least one sensor comprises a sensor selected from the group consisting of a temperature sensor, a humidity sensor, a carbon monoxide sensor, a carbon dioxide sensor, and a volatile organic compound sensor.

28. The airflow control system of claim 20 wherein the programmable device further comprises:

a processing unit;

data storage; and

control logic stored in the data storage and executable by the processing unit to control the inflation level of the inflatable bladder.

29. In an HVAC system having a damper device, the damper device including a bladder located in an airflow channel, a valve coupled to the inflatable bladder, a micro-pump co-located with and coupled to the valve, a wireless device for receiving damper control information, and a self-contained power source for powering the valve, the micro-pump, and the wireless device, wherein the damper device houses the valve, the pump, the wireless device, and the self-contained power source, and wherein the damper device is secured to the airflow channel a method for controlling airflow comprising the steps of:

powering the wireless device using the self-contained power source so as to enable the wireless device to receive the control information;

receiving at the wireless device the control information; and

powering the micro-pump and the valve using the self-contained power source so as to effect an adjustment in the inflatable bladder to control air flow in the channel, wherein the channel is an HVAC air duct for heating or cooling a room.

30. The method of claim 29 further comprising the step of programming at least one air property measure for use in generating the control information.

31. The method of claim 30 further comprising the step of measuring at least one air property for use in generating the control information.

32. The method of claim 31 wherein the at least one air property is temperature.

33. The method of claim 31 wherein the at least one air property is a level of carbon dioxide.

34. The method of claim 31 further comprising the step of comparing the at least one programmed air property measure to the corresponding at least one measured air property for use in generating the control information.

35. The method of claim 34 wherein the step of comparing includes applying at least one algorithm to the at least one programmed air property measure and the corresponding at least one measured air property to generate the control information.

36. The method of claim 34 wherein the at least one programmed property is temperature and the corresponding at least one measured air property is temperature.

37. The method of claim 29 wherein the steps are performed iteratively.

38. The method of claim 29 further comprising the step of causing the damper device to enter a low-power mode for a period of time.