Abstract: A dehumidifier apparatus including a frame defining an air inlet, the air inlet configured for receiving unconditioned air, an evaporator unit connected to the frame and in communication with the air inlet, a condenser unit connected to the frame and in communication with the air inlet, and a condensation collection tray connected to the frame, wherein the air inlet has an evaporator air inlet portion and a bypass air inlet portion directing a bypass airflow away from the evaporator unit to the condenser unit so that the bypass airflow flows to the condenser unit bypassing the evaporator unit, wherein the condensation collection tray is disposed in the air inlet in contact with the bypass air inlet portion.

Abstract: A system and related method are disclosed for controlling condensation in a space. The system includes a fan and one or more sensors for sensing environmental conditions such as temperature and relative humidity associated with the space and/or objects within the space. For instance, the sensors may sense a surface temperature of an object within the room. The system also includes a controller capable of receiving measurements from the sensor(s) and controlling the fan based on the sensed information. The system may additionally include a heater and/or a damper for transferring outside air into the space, either of which may be controlled by the controller based on the measurements.

Abstract: A method for controlling heater ventilation fan operation increases fan speed from low to high after a short delay after turn-on, and continues fan operation for a period of time based on duration of operation, after turn-off. The higher fan speed improves heat transfer and efficiency while the heating system is operating. Continuing fan operation after turn-off maximizes recovery of additional heat from the heat exchanger. Known methods do not provide sufficient air flow to efficiently transfer heat from the heat exchanger to the air, and leave high temperature air (i.e., 110 to 200° F.) in the heat exchanger after turn-off.

Abstract: A method for efficient control of a heater ventilation fan. The method includes switching the heater ventilation fan from low speed to high speed after a brief period P1 following starting, and continuing heater ventilation fan operation for a variable period of time P2 after the heat source has stopped. The period P1 is preferably about four minutes, and the period P2 is determined by the duration of heating and is generally between two and four minutes. Operating the heater ventilation fan at high speed improves heat transfer and efficiency while the heating system is operating, increases warm air movement to the space, satisfies the thermostat set point temperature in less time, reduces heating system operation, and reduces energy use. Continuing heater ventilation fan operation after turn-off maximizes recovery of additional heat from the heat exchanger to improve overall efficiency, extend the off cycle time, and save energy.

Abstract: A system and method for controlling cooling an engine involve an engine coolant circuit with a radiator and an engine, a fan and a coolant pump are provided. The fan and pump may be electrically driven, driven by a variable speed clutch, hydraulically driven, or driven by some other actively controllable means. When an increase in heat transfer rate is indicated, the fan speed or the coolant pump speed may be increased. The choice of increasing the fan speed or increasing the pump speed is determined so that the power consumed is minimized. dQ/dP, the gradient in heat transfer rate to power, is determined for both the fan and the pump at the present operating condition. The one with the higher gradient is the one that is commanded to increase speed.

Abstract: An assembly of computer peripherals, which has the functions of (temperature control and fan rotation speed regulation, includes a host casing, a temperature sensing circuit, a fan driver circuit, a liquid crystal display (LCD) driver circuit, an alarm circuit, a fan rotation regulating device for regulating the fan rotation speed within a safe range, a control device for selectively showing the location of the host casing, the hard disk and the microprocessor on the LCD, and a control circuit, all of which are connected to one another. The user controls the fan rotation speed regulating device according to the fan rotation speed value shown on the LCD to optimize the rotation speed of the fan used for the microprocessor and then minimize the noise. Furthermore, the location of the heat source to be sensed can be changed.

Abstract: In a heating system, when a high limit opens a predetermined number of times in a single call for heat by the thermostat, the system provides for operating the circulator blower at the cool speed rather than at the heat speed.