Carrier Corporation

Other

Temic Telefunken Microelectronic Gmbh

Thomas L DeWolf

Thomas R Phillips

Robert P Dolan

Ronald W Bench

Mark A Hill

Aryn Shapiro

Daniel L Waser

Paul W James

Josef J Schon

Gayatri Chaturvedi

Brian D Inman

Mark Morelli

Michael J Zirngibl

Roger S Bankus

Victor C Edozien

Graham Wright

A transport refrigeration system including a method for fault tolerant power management. The system includes a first sensor identified as required for operation of the transport refrigeration system and a second sensor operable as a backup for the first sensor. The system also includes a first power supply operably connected to the first sensor and configured to operate the first sensor and a second power supply operably connected to the second sensor and configured to operate the second sensor. The system further includes a controller operably connected to at least the first power supply as well as the first sensor and the second power supply as well as the second sensor, the controller configured to monitor at least the first power supply and the second power supply, if a fault is detected in the first power supply, operate the transport refrigeration system from the second sensor.

Power distribution for end-point failure detection and recovery for a transport refrigeration system

A system for remotely monitoring and controlling an HVAC device includes a server which receives queries from an entry device and data from the HVAC device. Databases with information regarding the location and status of the HVAC devices reside on the server, as does a user name/password file, instead of in the entry device or the HVAC controller. Connection is provided over various communications links including the Internet, POTS, and GSM networks. A user with an entry device such as a handheld computer or cell phone using wireless access protocol (WAP) can change settings, obtain diagnostic information, and receive alarm messages about a plurality of HVAC devices.

Method and apparatus for connecting to HVAC device

A system for verifying the operability of one or more HVAC devices in a communication network includes a network control device that sends a particular type of message to the HVAC devices. Each HVAC device receiving the message will initiate a clearly visible display on the HVAC device if the message is appropriately processed within the receiving HVAC device. Each HVAC device may be visually checked to confirm that it is in fact responding to the message from the network control device.

HVAC network verification system

An electronic system for monitoring the condition of the filter in an HVAC unit includes a controller which issues at least one command to a circuit for the motor of the fan producing airflow through the filter. The command to the driver circuit is associated with a desired run speed for the fan. The controller is operative to compute the speed of the fan following issuance of the command to the motor drive circuit. This computed speed is compared to a predetermined fan speed that would normally occur when the filter is dirty. The electronic system is operative to generate a warning in the event that the computed fan speed does not compare favorably with the predetermined fan speed.

Air filter monitor for HVAC units

An HVAC system is assigned a network identification for subsequent use within a communication network upon receipt of a formatted signal containing the network identification. The HVAC system stores the network identification in nonvolatile memory. The HVAC system also preferably stores a verification image of the communicated network identification so that any reading back of the network identification can be validated through comparison with the stored verification image.

Identification of HVAC systems in a communication network

HVAC control information is stored in a memory associated with a programmable processor in such a manner as to be recallable in a potentially high electrical noise environment. The HVAC control information is stored along with corresponding verification images in particular memory locations. The verification images for at least some of the HVAC control information have unique mathematical relationships with respect to the stored pieces of HVAC control information.

Noise tolerant HVAC system

HVAC control information is written in a particular manner to a memory associated with a programmable processor. The processor generates verification images of the information and stores the same along with the information in addressable memory locations. The stored information and its corresponding verification images is read back for verification as to having been correctly stored in addressable memory locations. A rewriting and rereading of the information and the respective verification images can occur up to a predetermined number of times if necessary to verify that the information and respective verification images have been correctly stored.

System for processing HVAC control information

A device for reading and transmitting control parameter selections to a control system for an HVAC system is disclosed. The device is activated by the control system which receives the encoded control parameter selections. The activation is preferably accomplished by switching a power supply on and off that is associated with the reading and transmitting device.

System for receiving HVAC control information

System and process are disclosed for selecting a range or configuration of refrigerants that may thereafter be used by a refrigerant recovery system in the recovery of one or more of the refrigerants. The recovery of refrigerants may occur at anytime after a range has been selected including a time during which the refrigerant recovery system has been switched off and back on again.

Refrigerant configuration system

A Network Management Control System for a multi-space building having individual space heating and cooling units in each space that ties the individual heating and cooling units together with a central computer which allows the remote computer to interrogate and overwrite parameters set at each local heating and cooling unit.

Network management control

A defrost cycle for a heat pump system which optimizes the efficiency of the heat pump by initiating defrost depending upon the relationship of both the outdoor coil ambient temperature and the outdoor coil refrigerant temperature with a predetermined temperature reference level.

Defrost control

A space temperature control which prevents overshoot and undershoot of a desired space temperature by adjusting a subsequent sensed space temperature as a function of a previous sensed maximum space temperature to deenergize a space conditioning device at the adjusted temperature to maintain the desired space temperature.

Active anticipatory control

A adjustable defrost cycle for a heat pump system which ensures that the outdoor coil is maintained free of frost by adjusting a defrost initiation reference level for the initiation of the next subsequent defrost cycle depending upon the time period of the previous defrost cycle.

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Liverpool, NY, United States of America

Thomas L DeWolf