Honeywell International Inc.

Honeywell G.m.b.h.

Jeffrey M Hammer

Mark E Stout

Tracy L Lentz

Timothy J Kensok

Michael Andrew Pouchak

Richard N Metzger

Jon W Orr

J Ward MacArthur

Timothy M Tinsley

Leisha J Rotering

Thomas John Olson

David C Ullestad

Russell A Straate

Stephen J Wesoloski

Paul A Anderson

Methods and Systems for controlling boiler systems are disclosed. In one illustrative embodiment, a derivative action control is used reduce the likelihood of overshoot from a newly activated boiler. When a newly activated boiler becomes active, the boiler is held at a low firing rate for a predetermined period of time. The predetermined period of time may be cut short or even entirely eliminated under certain conditions. The methods and devices are further adapted for use in multi-stage boiler systems. In one embodiment, only the first stage of a multi-stage boiler system that becomes active is held at the low firing rate.

Multi-stage boiler system control methods and devices

A system and method for controlling operation of an ultraviolet air treatment device including an ultraviolet lamp positioned to treat air within an air handling system that operates in either an on state or an off state. The method includes activating the ultraviolet lamp, and determining the operational state of the air handling system. The ultraviolet lamp is deactivated upon expiration of a predetermined time period during which the air handling system remains in the off state. The predetermined time period is preferably 30-60 minutes, preferably 40 minutes for residential applications.

System and method for controlling an ultraviolet air treatment device for return air duct applications

Devices and methods for controlling a boiler system. One illustrative method includes controlling the bypass temperature by increasing the firing rate of the boiler. Further methods include bypass temperature control methods wherein both regular and fast control methods are used, where the regular method operates to control bypass temperature by using, first, a bypass valve, and second, possible increases in firing rate. The fast control method responds to particular situations suggesting potential condensation in a primary heat exchanger to increase firing rate without waiting for a bypass valve to fully open. Further embodiments include controllers programmed for or containing programming for performing steps of the method embodiments, as well as systems incorporating such controllers.

Forward calculation energy augmentation method

An airflow sensor including a housing, a flexible substrate, and electrical components. The housing defines an internal compartment and a top face opening. The substrate includes circuitry traces, and defines a front and a back. The substrate is disposed within the compartment such that the back is exposed relative to the opening. The electrical components are electrically connected to the circuitry traces, extending from the front of the substrate opposite the opening, and include a heated temperature sensor spaced from a baseline temperature sensor. During use, airflow interfaces with the substrate back to cool the heated temperature sensor. The extent of this cooling as compared to the baseline temperature sensor is indicative of airflow. The system and method include detecting the presence or absence of airflow based upon a temperature differential between the temperature sensors as well as a rate of change in the temperature differential.

Airflow sensor, system and method for detecting airflow within an air handling system

A humidity control system for an enclosure requiring heat from a furnace and having one or more windows, includes sensors for the enclosure temperature and humidity, and a means for measuring the percentage of time which the furnace is operating (load factor). The system estimates the interior window temperature based on these parameters and controls humidity added to the enclosure air to prevent the enclosure air dew point temperature from rising above the estimated window temperature. This prevents condensation on the window surfaces. The estimation can be adjusted to compensate for different insulation characteristics of the window. In a preferred embodiment, the enclosure air temperature and humidity are derived from sensors conveniently located in the return air duct.

Humidity control based on an estimation using heating plant cycle, of inside window surface temperature

An apparatus for power load-shedding is disclosed which has an auxiliary thermostat disposed in the conditioned space for controlling the CN-OFF cycling function of a space conditioning apparatus during a load-shedding interval. The auxiliary thermostat includes an external communication signal receiver and a transmitter for transmitting control signals to a space conditioner control which controls the connection of available power to the space conditioner. The thermostat utilized during normal operation of the space conditioning means is disconnected during the load-shedding interval. The auxiliary thermostat is adapted to be supplied with line voltage as by plugging into a conventional outlet.

Apparatus for power load-shedding with auxiliary commandable thermostat

A condition control system adapted to supply a working fluid that has been modified by transferring energy to or from the working fluid is disclosed wherein a minimum energy loss is accomplished in operating the control system. The control system adjusts the setpoint of the system in response to parameters measured around the system and further provides for a minimum on/off cycling of the system in the event that the system is applied to a device which alters the working fluid between a fixed lower rate and an upper rate as would be typical in a burner-boiler configuration.

Condition control system for efficient transfer of energy to and from a

The present invention contemplates a method and apparatus for load-shedding duty cycling which overrides the normal thermostat control in a space conditioning system, upon receipt of an external signal as from the power company, in a manner such that the consumed power does not rise above the level that persisted just prior to the initialization signal. The present invention monitors the thermostat-controlled cycling pattern of a space conditioning system such as an air conditioner. Normally, the last thermostat-controlled cycle is then caused to become the reference or control cycle for the load shedding interval. That is, the ON portion of the reference cycle is caused to become the maximum allowable ON interval and the OFF portion of the reference cycle is caused to become the minimum OFF interval for the entire load shedding interval. The device may be started by a single radio command or other means. The release from load control may be automatically timed or based on other signals. A radio receiver or other such means is provided to receive the signal from the power utility company which starts the load control function. Unique features are also provided to prevent the undesirable effects of tampering with the thermostat setpoint just prior to the load shedding interval or to compensate for any cycle pattern of unusually long duration. This is done by compensating for the effect of these events by modifying the reference or control cycle when the appear.

Method and apparatus for power load shedding

A method and apparatus for the control of power consumption in individual space-conditioning loads fed by an electric power network utilizes a commandable, programmable temperature control device which gradually, substantially continually changes the control setpoint in response to an external signal to reduce power consumption such that temperature changes go relatively unnoticed by the occupants. A radio receiver or the like is utilized to receive a signal from the power utility company and, in response to the signal, the setpoint function of the thermostat associated with the load becomes an electronically simulated function in accordance with the invention and the user-control setpoint is removed from the control loop. The effective load shedding is also greatly enhanced by the provision of an integral reset function in addition to the conventional proportional control within the temperature control system. The use of a plurality of such systems enables the power utility to control electric power network peak load with a minimum impact on the comfort of individuals in the conditioned spaces.

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Maple Plain, MN, United States of America

Jeffrey M Hammer