Mitsubishi Electric Corporation

Matthew Wesley Smithson

Rodney Alan Olson

Lebbeous Alexander Fogle-Weekley

Haruhiko Ishida

Hiroaki Kotake

Hiroaki Ushirosako

Masato Tanigawa

Asa Paul Freedman

A computer-implemented method is provided of controlling a heating, ventilation, and air-conditioning (HVAC) system having a heat pump and an auxiliary heater to heat an inside zone, the method comprising: setting values for an economic balance point and a temperature set point; setting a capacity balance point to be equal to the economic balance point; measuring an initial inside temperature in the inside zone and an outside temperature outside of a structure containing the inside zone; determining that the initial inside temperature is lower than the temperature set point; determining that the outside temperature is greater than the capacity balance point; activating the heat pump to heat the inside zone; waiting a heating interval while the heat pump is active; determining that the heat pump is not effective in heating the inside zone; and setting the capacity balance point to be equal to the outside temperature.

Method for controlling an air conditioning system using an economic balance point and a capacity balance point

A heating, ventilation, and air conditioning (HVAC) system, comprising: an indoor HVAC unit configured to operate a first HVAC zone in accordance with an HVAC control signal; at least one piece of environmental equipment configured to control at least one environmental parameter in accordance with at least one environmental control signal; and an HVAC adapter configured to receive operational parameters over a communication network at system setup, provide the at least one environmental control signal to the at least one piece of environmental equipment.

System and method for controlling an HVAC system

A computer-implemented method of controlling an operational mode of an outdoor unit connected to a plurality of indoor units, the method including: determining an operational mode of an outdoor unit; determining, at a master decision unit, a target outdoor mode for the outdoor air-conditioning unit based on the priority, the current area mode, the current area temperature, and the set point for each of the indoor units, the maximum actual standby duration and the maximum allowable standby duration of each of the indoor units, and the minimum active duration and the current active duration for the outdoor unit; and systematically controlling the operational mode to become the target outdoor mode when the target outdoor mode is different from the operational mode.

System and method for switching a multiple-zone heat pump refrigerant system between cooling and heating modes

A system and method for provisioning multiple devices including a commissioning device, one or more endpoints, and a server. The system and method includes the following. The commissioning device accepts user-input network credentials of a wireless network from a user. The commissioning device searches for one or more endpoints unconnected to the wireless network. The commissioning device then verifies the ownership of the one or more endpoints. In response to a positive verification, the commissioning device securely the network credentials to the one or more endpoints. After receiving the network credentials, the one or more endpoints verify the integrity and authenticity of the communication from the commissioning device. After the one or more endpoints verifies the communication, the one or more endpoints access the wireless network based on the securely transferred wireless credentials.

Network provisioning system and method for collection of endpoints

A method is provided for controlling an HVAC unit, including: receiving input signals from a thermostat; setting a mode of the HVAC unit to a heating mode when a heating signal is enabled, or to a cooling mode when a cooling signal is enabled; setting a capacity of the HVAC unit to a set capacity based on the input signals; calculating a heating/cooling change rate based on temperature data received from the HVAC unit; comparing the heating/cooling change rate with a threshold; maintaining the HVAC unit at the set capacity percentage if the heating/cooling change rate is equal to the threshold; lowering the current capacity by a first cooling increment, to a minimum of 0%, if the heating/cooling change rate is above the threshold; and raising the current capacity by a second cooling increment, to a maximum of 100%, if the heating/cooling change rate is below the threshold.

Growing community of inventors

Atlanta, GA, United States of America

Matthew Wesley Smithson