Providence, RI, United States
Providence, RI, United States

Nortek is a subsidiary of Nortek Group Limited that produces peripheral devices for personal computers, such as speakers, mice, keyboards and webcams as well as mp3 players, DVD players and televisions. The company operates under the tagline of "Italian Design", based on their usage of shaping and colouring. Wikipedia.

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Patent
Nortek | Date: 2017-06-28

A liquid to air membrane energy exchanger (LAMEE) can be used as part of a heating and cooling system to transfer heat and moisture between a liquid desiccant and an air stream to condition the temperature and humidity of the air flowing through the LAMEE. The membrane can be a non-porous film having selective permeability for water, but not for other constituents that form the liquid desiccant. The non-porous membrane can allow for use of liquid desiccants, such as glycols, that had been previously determined to be unacceptable or undesirable in these types of applications. In an example, the membrane can be an ion-exchange membrane or pervaporation membrane.


Patent
Nortek | Date: 2017-02-13

A wearable device for detecting a user state is disclosed. The wearable device includes one or more of an accelerometer for measuring an acceleration of a user, a magnetometer for measuring a magnetic field associated with the users change of orientation, and a gyroscope. The wearable device also includes one or more microphones for receiving audio. The wearable device may determine whether the orientation of the wearable device has changed and may designate or re-designate microphones as primary or secondary microphones.


A heat pump system (10) comprises a compressor (16), at least one expansion valve (22; 36), an accumulator (18) for storing a volume of liquid refrigerant therein, a liquid refrigerant indicator connected to the accumulator (18) to indicate an appropriate refrigerant charge in cooling and heating modes, and a controller (28). The controller (28) is configured to determine a target compressor discharge pressure based on measured outdoor air temperature and control the compressor discharge pressure by modulating the position of the at least one expansion valve (22; 36), wherein the higher the target discharge pressure target, the less liquid refrigerant is left in the accumulator (18). The accumulator (18) can be sized to always have capacity to hold excess refrigerant during heating operations, and can include a charge level indicator so as to allow proper charge of the system (10) in the field without additional tools.


Systems and methods for controlling temperature in an enclosed space can include an air-to-air heat exchanger (AAHX) and a direct evaporative cooler (DEC). The DEC can be located in a scavenger or outdoor air stream such that the DEC cools the outdoor air, which is then used to cool or reject heat from a process air stream passing through the AAHX. In an example, the AAHX can be a sensible wheel. In another example, the AAHX can be a counter-flow flat plate. The system can operate in various modes, including an economizer mode and an evaporation mode, depending, in part, on the outdoor air conditions and a load on the system. In some examples, the system can include a DX coil to provide additional cooling to the process air in another operating mode.


Patent
Nortek | Date: 2015-01-27

A security system control panel or home automation control panel including an end-user replaceable cellular telephony module that is removable from the control panel without disassembling the control panel. The cellular module includes a body, a cellular telephony circuit coupled to the body, a cellular telephony antenna coupled to the body and the cellular telephony circuit, and a first connector coupled to the cellular telephony circuit and the body, wherein the first connector is sized and shaped or otherwise configured to be removably engaged by the end-user with a second connector in the control panel.


Patent
Nortek | Date: 2016-12-19

A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units at peak efficiency by computing the power consumed in various configurations and selecting the configuration requiring minimum power to operate.


Heat pumps that heat or cool a space and that also heat water, refrigerant management systems for such heat pumps, and methods of managing refrigerant charge. Various embodiments remove idle refrigerant from a heat exchanger that is not needed for transferring heat by opening a refrigerant recovery valve and delivering the idle refrigerant from the heat exchanger to an inlet port on the compressor. The heat exchanger can be isolated by closing an electronic expansion valve, actuating a refrigerant management valve, or both. Refrigerant charge can be controlled by controlling how much refrigerant is drawn from the heat exchanger, by letting some refrigerant back into the heat exchanger, or both. Heat pumps can be operated in different modes of operation, and various components can be interconnected with refrigerant conduit. Some embodiments deliver refrigerant gas to the heat exchanger and drive liquid refrigerant out prior to isolating the heat exchanger.


Embodiments of the present disclosure provide a system and method for providing conditioned air to at least one enclosed structure. The system may include at least one conditioning module configured to provide conditioned air to the at least one enclosed structure. The conditioning module(s) may include a conditioning energy exchanger. The conditioning module(s) is configured to circulate desiccant through a desiccant circuit to condition air passing through the conditioning energy exchanger. The conditioning module(s) may be configured to receive at least one of concentrated desiccant or diluted desiccant in order to vary temperature or concentration of the desiccant circulating through the desiccant circuit.


Certain embodiments provide an energy exchange system that includes a supply air flow path, an exhaust air flow path, an energy recovery device disposed within the supply and exhaust air flow paths, and a supply conditioning unit disposed within the supply air flow path. The supply conditioning unit may be downstream from the energy recovery device. Certain embodiments provide a method of conditioning air including introducing outside air as supply air into a supply air flow path, pre-conditioning the supply air with an energy recovery device, and fully-conditioning the supply air with a supply conditioning unit that is downstream from the energy recovery device.


Patent
Nortek | Date: 2015-08-19

A liquid to air membrane energy exchanger (LAMEE) can be used as part of a heating and cooling system to transfer heat and moisture between a liquid desiccant and an air stream to condition the temperature and humidity of the air flowing through the LAMEE. The membrane can be a non-porous film having selective permeability for water, but not for other constituents that form the liquid desiccant. The non-porous membrane can allow for use of liquid desiccants, such as glycols, that had been previously determined to be unacceptable or undesirable in these types of applications. In an example, the membrane can be an ion-exchange membrane or pervaporation membrane.

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