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Trane International Inc patents


Recent patent applications related to Trane International Inc. Trane International Inc is listed as an Agent/Assignee. Note: Trane International Inc may have other listings under different names/spellings. We're not affiliated with Trane International Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "T" | Trane International Inc-related inventors


 new patent  Sound level control in an hvac system

A system and method for controlling a sound level in a heating, ventilation, and air conditioning (hvac) system are disclosed. The system includes a refrigeration unit including a compressor, a condenser fan, a controller, and a sound controller. ... Trane International Inc

Blower housing labyrinth seal

A heating, ventilation, and/or air conditioning (hvac) system includes a blower assembly having a blower housing, a motor disposed at least partially within the blower housing, and an impeller comprising a plurality of blades disposed about the impeller that is connected to the motor by a shaft. The blower assembly includes a labyrinth seal that provides a tortuous leakage airflow path between the blower housing and the impeller to substantially reduce the amount of air that escapes from the blower housing between the blower housing and the impeller to provide an increased blower efficiency as compared to traditional blower assemblies.. ... Trane International Inc

Automated peripheral power management

A building automation system (bas) controller includes a power supply, a primary controller, and plurality of usb ports for connection to a set of supported peripherals. The primary controller identifies the inserted usb device type and, based on device type, estimates a current draw of the usb device. ... Trane International Inc

Control of residential hvac equipment for dehumidification

Systems and methods are disclosed that include providing a heating, ventilation, and/or air conditioning (hvac) system with a system controller and an indoor air handling unit comprising an auxiliary heat source, whereby the system controller is configured to employ a hysteresis control algorithm to operate the hvac system in a cooling mode while simultaneously operating the auxiliary heat source to provide a dehumidified, temperature-conditioned airflow to a zone conditioned by the hvac system.. . ... Trane International Inc

Automated system to determine variable frequency drive skip frequency bands for vibration control

A vibration control system for a variable speed cooling system includes a programmable controller in communication with a variable frequency drive (vfd). The programmable controller is programmed to command the vfd to operate at frequencies only outside of one or more frequency lockout bands automatically calculated by the programmable controller based on a comparison of newly acquired variable speed cooling system vibration data with previously stored variable speed cooling system vibration specification data.. ... Trane International Inc

Variable orifice for a chiller

A refrigerant circuit is disclosed. The refrigerant circuit includes a compressor, a condenser, a first expansion device, an economizer, a second expansion device, and an evaporator fluidly connected. ... Trane International Inc

Rolling element bearings for an oil-free liquid chiller

A refrigeration chiller employs a centrifugal compressor the impellers of which are mounted on a shaft which is itself mounted for rotation using rolling element bearings lubricated only by the refrigerant which constitutes the working fluid of the chiller system. Apparatus is taught for providing liquid refrigerant to (1.) the bearings immediately upon chiller start-up, during chiller operation and during a coastdown period subsequent to shutdown of the chiller and (2.) the drive motor of the chiller's compressor for motor cooling purposes. ... Trane International Inc

Leak detection in a fluid compression system

Methods and systems for leak detection in a fluid compression system using a purge system are disclosed herein. In an embodiment, a method for detecting leaks includes determining, during a period of vacuum, a purge exhaust rate of non-condensables from a purge system integrated with a chiller unit. ... Trane International Inc

Enhanced tubular heat exchanger

A heating, ventilation, and/or air conditioning (hvac) system may include a heat exchanger comprising at least one heat exchanger tube. The heat exchanger tube may include multiple passes: a first pass, a second pass having an elliptical portion with ribs disposed in the elliptical portion, a third pass having an elliptical portion with ribs disposed in the elliptical portion, and a fourth pass having an elliptical portion with ribs disposed in the elliptical portion. ... Trane International Inc

Device and method for automatic switching of communication protocol of network devices based on user action

A computer implemented method for automatically switching communication protocols. The method includes detecting a user input, determining, based on the user input, a first communication protocol needed to address the user input, and creating a virtualized network wherein devices that use a second communication protocol are represented via virtualized devices according to the first communication protocol.. ... Trane International Inc

System for measuring fluid flow in a fluid passage of an hvac system

Methods and systems to measure a volumetric fluid flow rate through a fluid flow passage, such as an air handler of a hvac system, are described. The method may include obtaining a flow rate measurement in a measuring section, and calculating a total flow rate based on a correlation between the obtained flow rate measurement and the total flow rate. ... Trane International Inc

Thermostat temperature compensation modeling

Systems and methods for configuring a temperature control system of a heating, ventilation, and air conditioning (hvac) system controller are described. The hvac system controller includes a processor in communication with a memory and a user interface. ... Trane International Inc

System and method for detecting refrigerant contamination in an hvacr system

A system for detecting if a refrigerant in an hvacr system is contaminated. The system includes a detector that detectes a property of a refrigerant gas in a vapor space and compares the detected property with a reference property for uncontaminated refrigerant gas. ... Trane International Inc

Method of extracting diagnostic information from an hvac system

The present disclosure is directed to a method for determining the operational state of an hvac system. The method includes transmitting diagnostic data and/or commissioning settings to and from an hvac system and server by means of a mobile device, comparing the data to a predetermined condition, and transmitting updated system information back to the hvac system if needed.. ... Trane International Inc

03/29/18 / #20180087509

Active clearance management in screw compressor

A compressor includes a housing defining a working chamber. The housing further includes a bore and an endplate disposed toward a discharge end. ... Trane International Inc

03/29/18 / #20180087498

System and method for controlling a system that includes variable speed compressor

A system and method for controlling a system that includes a variable speed compressor are described. The method can provide improved accuracy in the control of a system, for example, a heating, ventilating, and air condition (hvac) system that includes a variable speed compressor, and can reduce a compressor cycling frequency of the compressor when a required capacity is below a minimum capacity of the compressor.. ... Trane International Inc

03/15/18 / #20180073787

Cooling circuit for a variable frequency drive

Systems and methods for controlling a cooling circuit for a variable frequency drive (vfd) in an hvacr system are disclosed. The method includes determining, by a controller, an operating condition of a heat sink associated with the vfd. ... Trane International Inc

03/15/18 / #20180073760

Sleep enhancement in an hvac system

Improvements to an hvac thermostat include a sleep-enhancing feature which regulates the target temperature of the hvac system according to a temperature profile which complements the natural changes in body temperature of a person during sleep. The timing of the temperature profile is advanced to cause room temperature to decrease before the natural decrease in body temperature is expected to occur, thereby helping lead a person into sleep without the use of pharmaceuticals or other artificial sleeping aids. ... Trane International Inc

03/01/18 / #20180061212

System and method to assist building automation system end user based on alarm parameters

Disclosed are systems and methods for operating a building automation system (bas) that communicates with end devices via a master-slave token passing network (mstp), e.g., bacnet, a local operating network (lon), or any other suitable communications protocol to receive alarm messages. The bac enables a user to rapidly and effectively respond to an alarm by providing an alarm assistance message that provides the user with detailed remediation procedures concerning the current alarm. ... Trane International Inc

03/01/18 / #20180058741

Variable fan speed control in hvac systems and methods

Generally, a variable fan speed control in an hvac system is described. Such methods and systems to control fan speed can in turn improve efficiency of the hvac system by minimizing power consumption, for example of the compressor. ... Trane International Inc

02/22/18 / #20180051698

Compressor noise reduction

A scroll compressor is disclosed. The compressor includes an enclosure including a compression mechanism that compresses a working fluid. ... Trane International Inc

02/15/18 / #20180045470

Refrigerant outlet device of a condenser

A condenser equipped with a refrigerant outlet configured to receive and store liquid refrigerant during an off-cycle is described. The refrigerant outlet may include an outflow pipe surrounded by a weir. ... Trane International Inc

02/15/18 / #20180045429

Hvac system with selective flowpath

A heating, ventilation, and/or air conditioning (hvac) system includes: a furnace having a furnace heat exchanger; and an indoor hvac unit having a refrigerant heat exchanger. At least one of a component of the furnace and a component of the indoor hvac unit are selectively removable from an airflow path of the hvac system.. ... Trane International Inc

02/08/18 / #20180038618

Lubricant separator

A cyclonic type lubricant separator with various features that reduces pressure losses, manages local gas velocities which may contribute to entrainment of liquid(s) (e.g. Oil), maintains and/or improves oil separation (e.g. ... Trane International Inc

01/25/18 / #20180023895

Enhanced tubular heat exchanger

A heating, ventilation, and/or air conditioning (hvac) system may include a heat exchanger comprising at least one heat exchanger tube. The heat exchanger tube may include multiple passes: a first pass, a second pass having an elliptical portion with dimples disposed in the elliptical portion, and a third pass having an elliptical portion with dimples disposed in the elliptical portion. ... Trane International Inc

01/25/18 / #20180023569

Scallop step for a scroll compressor

A scroll member for a scroll compressor is disclosed. The scroll member includes a base member and a wrap member formed on a major surface of the base member. ... Trane International Inc

01/18/18 / #20180017296

Cooling fan for refrigerant cooled motor

An electric motor for a vapor compression system is disclosed. The electric motor is provided with a working fluid. ... Trane International Inc

01/18/18 / #20180017283

Air handling unit with integral inner wall features

An air handling unit has an interior wall configured to selectively retain a removable component of the air handling unit. An air handling unit has an interior wall configured as a drain pan. ... Trane International Inc

01/18/18 / #20180017059

Variable economizer injection position

A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, and a compressor outlet. The compressor further includes a compression chamber defined between the bore and the rotor, wherein a volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. ... Trane International Inc

01/11/18 / #20180010858

Return waterbox for heat exchanger

A return waterbox for a heat exchanger, such as a shell-and-tube heat exchanger, is provided. The return waterbox may include an insert configured to direct a fluid flow(s) in the return waterbox. ... Trane International Inc

01/11/18 / #20180010833

Accumulator for charge management

Embodiments of an accumulator for charge management are described. A fluid compression system, comprising an accumulator fluidly connected to an evaporator via a spillover port. ... Trane International Inc

01/04/18 / #20180004178

Occupancy sensing and building control using mobile devices

Apparatus, systems and methods for ascertaining the occupancy of a building are presented. The building is divided into one or more control zones which correspond to physical areas of the building associated with controllable modules, such as hvac units, lighting, irrigation, or other environmental features such as fountains, music, video, and the like. ... Trane International Inc

12/28/17 / #20170373564

Electric motor with harmonic shunting

Disclosed is a hermetic ac electric motor that includes harmonics shunting such that high frequency harmonics are shunted from the ac electric motor without the use of one or more high frequency filters in the associated motor drive. A related method of operating an ac electric motor includes shunting high frequency harmonics to a fluid passing through the ac electric motor. ... Trane International Inc

12/21/17 / #20170364106

Systems and methods for provisioning components of an hvac system

Systems and methods for provisioning a component of an hvac system are presented. A provisioning device, such as a smartphone, is used to scan hvac component information obtained from a tag on each component and wirelessly transfers the information to a thermostat or hvac system controller. ... Trane International Inc

12/14/17 / #20170356684

Methods and systems for controlling a chiller system having a centrifugal compressor with a variable speed drive

Methods and systems for controlling a chiller system to achieve control stability while maintaining optimum efficiency. Particularly, methods and systems for controlling a centrifugal compressor speed and an inlet guide vane position that establishes three distinct regions in the control path: (i) during initial unloading from full load, the inlet guide vane position is kept at a fully open position while the centrifugal compressor speed is changed to achieve the desired cooling capacity; (ii) between an inflection point and a transition point, keeping the centrifugal compressor speed constant while the inlet guide vane position is changed to achieve the desired cooling capacity; and (iii) between the transition point and zero cooling capacity, changing both the inlet guide vane position and the centrifugal compressor speed to achieve the desired cooling capacity.. ... Trane International Inc

12/07/17 / #20170350398

Intermediate discharge port for a compressor

A screw compressor includes a compressor housing defining a working chamber, the housing including a plurality of bores; a first rotor having helical threads, the first rotor being housed in a first of the plurality of bores; a second rotor having helical threads intermeshing with the helical threads of the first rotor, the second rotor being housed in a second of the plurality of bores; an inlet port that receives a fluid to be compressed; an outlet port that receives a compressed fluid; and an intermediate discharge port disposed between the compression chamber and the outlet port, the intermediate discharge port including a sealing member and a biasing mechanism, fluid flow being prevented between the compression chamber and the intermediate discharge port when in a flow-blocked state, and fluid flow being enabled from the compression chamber through the intermediate discharge port when in a flow-permitted state.. . ... Trane International Inc

11/30/17 / #20170347291

Method of fragmenting a message in a network

Embodiments described herein provide a method of fragmenting a large message into, for example, numbered packets for sending the message in a packet based communication system, such as in a zigbee wireless network. Each packet may have a predetermined size and may include a mac address, a network header of a variable size, and fragmented message data. ... Trane International Inc

11/30/17 / #20170343261

Screw compressor drive control

An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. ... Trane International Inc

11/23/17 / #20170336096

Heat exchanger refrigerant drain

A combination refrigeration displacement and drain device is disclosed that can be mounted within a heat exchanger, such as a shell and tube heat exchanger, which may be used for example as a heat exchanger in a chiller unit, which may be used in an hvac or refrigeration system. One example of such components can include heat exchangers, such as for example a condenser employing a gravity drain. ... Trane International Inc

11/16/17 / #20170328618

Lubricant blends to reduce refrigerant solubility

Compositions, methods, systems, and applications herein are directed to lubricant blends that balance solubility and viscosity of a refrigerant, where in some cases the lubricant blends herein help reduce solubility of a refrigerant. A lubricant blend includes a mixture of two or more different types of lubricants to reduce refrigerant solubility.. ... Trane International Inc

11/09/17 / #20170321907

Dehumidifier for high airflow rate systems

An hvac system includes a dehumidifier having an evaporator, a condenser, a compressor, and an expansion device. The dehumidifier is disposed in at least one of a main supply duct, a main return duct, and an indoor unit of the hvac system. ... Trane International Inc

10/26/17 / #20170310100

Sleep current failure detection

Hvac components having improved efficiency are described. In one embodiment, excessive sleep current draw in a battery-powered device having a microcontroller is detected by measuring a voltage drop across a mosfet device coupled in a forward-conducting orientation in series between the battery and the microcontroller, causing a transistor to conduct when the voltage drop exceeds a predetermined threshold to generate a first trigger signal, integrating the first trigger signal to generate a second trigger signal, and generating an interrupt to the microcontroller. ... Trane International Inc

10/05/17 / #20170284749

Heat exchanger coil with offset fins

Apparatuses, systems and methods are directed to heat exchangers that are made of microchannel tubes and that have offset fins of various geometries and density. The heat exchanger coils can be implemented in various refrigeration and/or heating, ventilation, and air conditioning (hvac) units or systems thereof.. ... Trane International Inc

09/21/17 / #aligning a motor shaft in a fan assembly is described. aligning a centerline of a motor shaft in a direct drive fan assembly includes selecting a motor from among a plurality of motors and matching a motor-plate from among a plurality of motor plates to the motor, the matched motor plate is based on the selected motor.

Trane International Inc.

. . ... Trane International Inc

09/21/17 / #20170268807

Refrigerant management in a hvac system

Methods and systems to manage refrigerant levels in a chiller system are provided. An evaporator of the chiller system may be configured to have a spill over port allowing oil containing refrigerant to spill over through the spill over port. ... Trane International Inc

08/31/17 / #20170248349

Heat pump

Embodiments as disclosed herein are directed to a heat pump that employs at least two different refrigerants, each of which is optimized for either a cooling operation mode or a heating operation mode. The embodiments as disclosed herein can help increase the capacity and/or efficiency of a heat pump in both the cooling operation mode and the heating operation mode. ... Trane International Inc

08/31/17 / #20170248340

Methods of controlling fan capacity and coil capacity in hvac systems

Methods to regulate a discharge fan and a coil of a hvac system are described. The method may include regulating a discharge air temperature of the cooling/heating coil of the hvac system while maintain the discharge fan at a low capacity setting. ... Trane International Inc

08/17/17 / #20170234585

Refrigerant cooling and lubrication system with refrigerant vapor vent line

Generally, apparatuses, systems, and methods are described to vent refrigerant vapor from the refrigerant pump line using a vent line, such as during priming of the pump and/or during a startup of the compressor, directed to a relatively reduced volute casing mass of the refrigerant pump, and/or directed to returning refrigerant to an economizer or chiller component other than the condenser.. . ... Trane International Inc

08/10/17 / #20170227273

Controls and operation of variable frequency drives

Unique apparatuses, methods, and systems of opposing, limiting, and/or preventing undesired or un-commanded compressor rotation are disclosed. One exemplary embodiment is an hvacr system comprising a variable frequency drive configured to drive an electric motor to rotate a screw compressor or scroll compressor. ... Trane International Inc

08/10/17 / #20170227268

Lubricant separator for a heating, ventilation, and air conditioning system

A lubricant separator is disclosed. The lubricant separator can cause lubricant which is entrained with a heat transfer fluid (e.g., a lubricant—heat transfer fluid mixture) to coalesce and fall (e.g., via gravity) into a bottom portion of a lubricant tank assembly. ... Trane International Inc

08/10/17 / #20170227266

Multi-coil microchannel evaporator

Apparatuses, systems and methods implementing a multi-coil heat exchanger are directed to providing good heat transfer performance, capacity, and efficiency, and while reducing pressure drop through multi-coil microchannel evaporators. The multi-coil heat exchanger in some examples is a multi-coil microchannel evaporator. ... Trane International Inc

08/03/17 / #20170223520

Device and method for setting network and channel information in a network device

Devices and methods use an extended permanent account number identification (epid) of a mesh network (e.g., zigbee) to include in the epid a network information, a network channel information (e.g., 802.15.4 channel), and/or other data. The devices and methods allows a node to use the epid to identify a desired network to join and join the network on the predetermined channel for that network.. ... Trane International Inc

08/03/17 / #20170222595

Increasing component life in a variable speed drive with stator heating

An apparatus and method for extending component life in a motor drive having a stator heating mode is disclosed. The current supplied to stator windings is cycled through a set of primary stator power transistors to increase the overall lifespan of the drive, thus preventing premature failure of the stator power transistors by splitting the workload between them, rather than having a single transistor supply the bulk of the stator heating current.. ... Trane International Inc

08/03/17 / #20170219255

Multi-split hvac system

A heating, ventilation, and/or air conditioning (hvac) system has a first variable refrigerant flow outdoor unit, a first ducted variable speed indoor unit configured to selectively exchange refrigerant with the first variable refrigerant flow outdoor unit, and a second indoor unit configured to selectively exchange refrigerant with the first variable refrigerant flow outdoor unit.. . ... Trane International Inc

07/06/17 / #20170191479

Double-ended scroll compressor lubrication of one orbiting scroll bearing via crankshaft oil gallery from another orbiting scroll bearing

A scroll compressor orbiting scroll bearing lubrication system includes a scroll compressor crankshaft having a lubricating fluid gallery extending therethrough between a first stage orbiting scroll and a second stage orbiting scroll. The first stage employs an orbiting scroll radial bearing and an orbiting scroll hydrodynamic thrust bearing, while the second stage employs an orbiting scroll radial bearing and an orbiting scroll hydrostatic thrust bearing. ... Trane International Inc

07/06/17 / #20170191475

System and method for controlling a system that includes fixed speed and variable speed compressors

A system and method for controlling a system that includes fixed speed and variable speed compressors are described. The method generally allows the system, for example, a heating, ventilating, and air condition (hvac) system that includes fixed speed and variable speed compressors, to maximize unit modulating capability. ... Trane International Inc

06/22/17 / #20170179859

Magnet degradation and damage controls and diagnostics for permanent magnet motors

Techniques for motor magnet degradation controls and diagnostics are disclosed. An exemplary technique determines q-axis current, d-axis current, q-axis voltage, and/or d-axis voltage of a permanent magnet motor based upon sensed current and voltage information of the motor. ... Trane International Inc

06/22/17 / #20170176076

System and method for dynamically determining refrigerant film thickness and dynamically controlling refrigerant film thickness at rolling-element bearing of an oil free chiller

Methods are directed towards dynamically determining refrigerant film thickness at the rolling-element bearing and for dynamically controlling refrigerant film thickness at the rolling-element bearing. Further, an oil free chiller system is configured for dynamically determining refrigerant film thickness at the rolling-element bearing of the oil free chiller system, wherein the oil free chiller system is also configured for dynamically controlling refrigerant film thickness at the rolling-element bearing of the oil free chiller system.. ... Trane International Inc

06/22/17 / #20170176074

Suction conduit flow control for lubricant management

A system includes first and second compressors arranged in parallel, a condenser, expansion device, evaporator, and flow control device fluidly connected. The first compressor includes a first lubricant sump and the second compressor including a second lubricant sump. ... Trane International Inc

06/22/17 / #20170176068

Electronic expansion device

An electronic expansion device includes a main body having inlet and outlet side faces; an inlet disposed on the inlet side face; an orifice formed in the main body between the inlet side face and the outlet side face; a flow path fluidly connecting an inlet side of the orifice and an outlet side of the orifice, the flow path configured to redirect an inlet flow and provide an outlet flow; an outlet disposed on the outlet side face, the outlet being in fluid communication with the inlet via the orifice and the flow path; and a flow control device including an electric motor and a sealing member, the sealing member extending through the main body between the inlet and the outlet, wherein the sealing member is movable into and out of the main body to control the outlet flow of a fluid.. . ... Trane International Inc

06/15/17 / #20170167769

Axial thrust control for rotary compressors

Systems and methods are used to control operation of a rotary compressor of a refrigeration system to limit or prevent movement of rotors due to axial thrust loading resulting from rapid changes in speed of the rotors of the compressor. The operational profile of the motor is controlled to maintain acceleration torque and deceleration torque within predefined limits. ... Trane International Inc

05/18/17 / #20170137681

Refrigerant compositions

Refrigerant compositions are described, which can be used for example, in refrigeration, air conditioning, and/or heat pump systems which for example, can be incorporated into a heating, ventilation and air conditioning (hvac) system or unit. The refrigerant composition includes an amount of a r125 refrigerant, an amount of a r32 refrigerant, and an amount of a r1234yf refrigerant, where the r32 refrigerant has higher flammability than the r125 refrigerant, and the r1234yf refrigerant has higher flammability than the r125 refrigerant.. ... Trane International Inc

04/20/17 / #20170108293

Crimp joint with o-rings enhanced with adhesive and incorporated to manifold feeder tubes

Systems and methods are disclosed that include providing a heating, ventilation, and/or air conditioning (hvac) system with a spine fin heat exchanger comprising elliptical heat exchanger tubes joined to elliptical feeder tubes extending from the heat exchanger manifold by a crimp joint that is configured such that the heat exchanger tubes are inserted into corresponding feeder tubes. The crimp joint includes at least two o-rings disposed between an outer diameter of each of the heat exchanger tubes and an inner diameter of each of the feeder tubes. ... Trane International Inc

04/13/17 / #20170102723

Hvac thermostat

Improvements to an hvac thermostat include a fuel control module that estimates a rate of fuel usage by the hvac system and issues a warning and optionally schedules a fuel delivery or solicits a fuel delivery bid when the on-site fuel supply drops beneath a predetermined level, a nightlight module that illuminates a touchscreen in accordance with at least one nightlight parameter, and a user interface mode control module that selects for display on the touchscreen display, a primary user interface from among a plurality of potential user interfaces based at least in part upon the frequency of use of each of the plurality of potential user interfaces.. . ... Trane International Inc

04/06/17 / #20170097182

Fluid management in a hvac system

Embodiments of a spill over tank for an evaporator of a hvac system are described. The spill over tank may be configured to receive a refrigerant directed out of the evaporator. ... Trane International Inc

03/30/17 / #20170089620

Refrigerant cooling and lubrication system

Generally, apparatuses, systems, and methods are described to prime a refrigerant pump by decoupling or shielding from a condenser operation, such as for example the condenser water pump, so that liquid refrigerant can be appropriately sourced from the condenser and/or the evaporator using flow control device(s) such as a source valve on a source line of the condenser and/or on a source line of the evaporator and the control of such valve(s).. . ... Trane International Inc

03/02/17 / #20170059188

Inclined heat exchanger with tapered ends

Systems and methods are disclosed that include providing a heating, ventilation, and/or air conditioning (hvac) system with a tapered end heat exchanger (tehe) having a first tapered end disposed at a lower end of the tehe with respect to an incoming airflow and on the downstream face of the tehe and having a second tapered end disposed at an upper end of the tehe with respect to an incoming airflow and on the upstream face of the tehe. A drain pan having louvers is disposed about the lower end of the tehe and configured to restrict airflow through narrow portions of the first tapered end of the tehe. ... Trane International Inc

02/23/17 / #20170050193

Air cleaning systems and methods

An hvac system having an air cleaner, a fan that selectively generates an air flow at least partially through the air cleaner, and a controller that establishes a functional relationship between an air flow related criterion and a correlated power level setting of the air cleaner, determines an air flow related criterion value, determines a correlated power level setting value using the determined air flow related criterion value and the functional relationship, and controls the air cleaner as a function of the determined correlated power level setting value is disclosed.. . ... Trane International Inc

02/16/17 / #20170046766

Enhanced selection tool for hvac system components

A product selection tool is disclosed that utilizes input from consumers and third party data sources to dynamically enhance the selection of hvac components. Specific and estimated data characterizing existing hvac components is used to identify suitable replacement hvac components based on type, size, energy efficiency, and other system requirements in view of regional climate data.. ... Trane International Inc

02/16/17 / #20170045257

Heat exchange assembly in an air to air heat exchanger

A heat exchange assembly in an air to air heat exchanger includes an arrangement, construction, and/or configuration of a combination of latent heat exchangers and sensible heat exchangers. The heat exchange assembly can minimize footprint required for the air to air heat exchanger, e.g. ... Trane International Inc

02/09/17 / #20170038167

Heat exchanger with enhanced airflow

Systems, apparatuses, and methods described herein are directed to a heat exchange tube structure and an arrangement of heat exchange tubes that enhance or help promote fluid flow through a heat exchanger. Bend portions of heat exchange tubes may be structured and configured to allow for gaps so that fluid may pass an assembly of the heat exchange tubes. ... Trane International Inc

02/02/17 / #20170030623

Multi-stage control for electromechanical heating, ventilation, and air conditioning (hvac) unit

A control system for a heat transfer circuit, an hvac unit containing a heat transfer circuit, and a method of retrofitting an hvac unit are described. The control system includes a thermostat having a first cooling stage signal output terminal and a second cooling stage signal output terminal; a controller electrically connected to the thermostat; a sensor electrically connected to the controller; and a switch electrically connected to the controller, and that receives a first cooling stage signal output from the thermostat. ... Trane International Inc

01/26/17 / #20170023955

Hvac system with improved control switching

An hvac switching circuit may comprise a current source circuit charging a capacitor used to power an hvac dc power relay coil. The power relay coil terminal is connected to an activation control circuit which comprises at least one of (1) each of (a) a threshold circuit which activates a first transistor to energize the power relay coil when the voltage across the threshold circuit reaches a first threshold value and (b) a regenerative feedback circuit configured to lower the first threshold value to a second threshold voltage, and (2) a voltage divider connected between a first terminal on the power relay coil and the negative dc supply, and a programmable shunt regulator, configured as a level triggered switch, programmed by the voltage divider and connected between the second power relay coil terminal and the negative dc supply.. ... Trane International Inc

01/19/17 / #20170016869

Energy management for sensors

The present disclosure is directed to a method for reducing power consumption of a sensor. The method includes determining if a predetermined condition has been met to change at least one of a sensing rate or a sensor resolution, and changing at least one of the sensing rate or sensor resolution if it is determined that the predetermined condition has been met.. ... Trane International Inc

01/12/17 / #20170010017

Systems, aparatuses, and methods of air circulations using compact economizers

An air circulation circuit including components that are in fluid communication. An air return connection is disposed downstream of the indoor space wherein the air return connection is configured to deliver an air stream from the indoor space to an economizer. ... Trane International Inc

01/05/17 / #20170006111

Active device management for use in a building automation system

A building automation system (bas) comprising a plurality of end devices, at least one communication network, and a server engine comprising a communication state manager for actively managing the state of various devices in building automation system and an associated reconnect manager to reestablish communication with off-line devices. The communication manager and the reconnect manager coordinate the interaction between the server engine and the devices in order to minimizing the load on the communication network, while also working to establish the working state of any of the end devices and to transition off-line to an on-line state.. ... Trane International Inc








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