Abstract:
A display system includes an acquirer, an estimator, and a controller. The acquirer acquires a first detection value and a second detection value from a temperature sensor and a humidity sensor, respectively. The temperature sensor and the humidity sensor are both included in a ventilator that ventilates a room. The estimator estimates, based on the first detection value and the second detection value that are acquired by the acquirer, a predicted mean vote distribution representing a distribution of predicted mean votes in a height direction in the room. The controller makes a display device present the predicted mean vote distribution estimated by the estimator.
Abstract:
A building controller includes a controller that is operatively coupled to a motion sensor and provides one or more control signals based at least in part on the motion sensed by the motion sensor. A lens member includes a HDPE (high density polyethylene) lens and a lens mounting structure that includes a lens retention hook. A bracket defines an aperture in registration with the motion sensor and further defines a lens securement aperture configured to accommodate the lens retention hook. The bracket may also define a lens securement spring configured to provide a biasing force to the lens retention hook of the lens mounting structure.
Abstract:
A system and method for analyzing an HVAC/R system includes a receiver for receiving signals from sensors, a memory for storing a pressure-enthalpy relationship for refrigerant of the HVAC/R system, a processor in communication with the receiver and the memory, the processor configured to determine a first energy transfer value associated with an air handler of the HVAC/R system based on the received signals from the sensors, determine a second energy transfer value associated with the refrigerant of the HVAC/R system based on the pressure-enthalpy relationship and the received signals from the sensors; and verify the determined first and second energy transfer values by comparing the first energy transfer value with the second energy transfer value.
Abstract:
A superheat sensor includes a housing, a pressure sensor mounted within the housing, and a processor. A fluid passageway connects the pressure sensor to a source of superheat fluid. An external temperature sensor is located outside the housing of the superheat sensor and is electrically connected to the processor. The external temperature sensor is also electronically connected to a component of a fluid system to which the superheat sensor is attached and is configured to provide one of an internal temperature of the component, an external temperature of the component, and a temperature of fluid in the component.
Abstract:
A combination valve includes an isolation shutoff valve to prevent a fluid flow; a check valve to prevent backflow and gravity circulation of fluid flow; a pressure sensor to sense a pressure measurement of fluid flow and determine pressure sensor signaling containing information about a sensed pressure measurement; a temperature sensor to sense a temperature measurement of fluid flow and determine temperature sensor signaling containing information about a sensed temperature measurement; and a flow measurement sensor to sense a flow measurement of fluid flow and determine flow measurement signaling containing information about a sensed flow measurement. The pressure sensor, temperature sensor and flow measurement sensor are all embedded and preassembled in the combination valve with the isolation shutoff valve and the check valve as part of one integral composite unit or component, so as to form a combination isolation valve and check valve with integral flow rate, pressure and/or temperature measurement.
Abstract:
A monitoring system for monitoring operation of a refrigerant-cycle system is disclosed. A condenser unit sensor measures an operating characteristic of a condenser unit, the condenser unit including a condenser and a compressor. An evaporator unit sensor measures an operating characteristic of an evaporator unit, the evaporator unit including an evaporator and a fan. An electrical sensor measures an electrical quantity indicative of power consumption of the refrigerant-cycle system. A processing system calculates an efficiency of the refrigerant-cycle system based on the power consumption of the refrigerant-cycle system, the operating characteristic of the condenser unit, and the operating characteristic of the evaporator unit.
Abstract:
A monitoring system for monitoring operation of a refrigerant-cycle system is disclosed. A first temperature sensor measures a first temperature of air at a first location downstream of an evaporator. A second temperature sensor measures a second temperature of air a second location upstream of the evaporator. A processing system determines a temperature drop across the evaporator based on the first temperature, the second temperature, and a humidity of air. The processing system that determines whether airflow through the evaporator is restricted based on the temperature drop across the evaporator.
Abstract:
A method of sensing superheat includes the steps of: (a) connecting a fluid inlet member of a superheat sensor to one of a plurality of fluid systems; (b) allowing fluid to flow from the fluid system to which the superheat sensor is connected to the superheat sensor; (c) sensing a temperature of the fluid in the fluid system with one of an internal temperature sensor mounted within a housing of the superheat sensor and an external temperature sensor mounted outside of the housing of the superheat sensor; and (d) calculating a superheat of the fluid in the fluid system.
Abstract:
A power monitoring system includes a plurality of current sensors suitable to sense respective changing electrical current within a respective conductor to a respective load and a conductor sensing a respective voltage potential provided to the respective load. A power monitors determines a type of circuit based upon a signal from at least one of the current sensors and a signal from the conductor, wherein the type of circuit includes at least one of a single phase circuit, a two phase circuit, and a three phase circuit. The power meter configures a set of registers corresponding to the determined type of circuit in a manner such that the configuring is different based upon each of the single phase circuit, two phase circuit, and three phase circuit suitable to provide data corresponding to the determined type of circuit.
Abstract:
A monitoring system for monitoring operation of a refrigerant-cycle system is disclosed. A differential pressure sensor measures a pressure difference between: (i) air at a first location upstream of an evaporator of the refrigerant-cycle system; and (ii) air at a second location downstream of the evaporator of the refrigerant-cycle system. An electrical sensor measures an electrical quantity indicative of power consumption of the refrigerant-cycle system. A processing system determines whether airflow through the evaporator is restricted based on the pressure difference. The processing system calculates an efficiency of the refrigerant-cycle system based on the power consumption of the refrigerant-cycle system.