Daikin Industries, Ltd.

Daikin Manufacturing Company, L.p.

Hiroyuki Imada

Junichi Shimoda

Masahiro Oka

Chris Bellshaw

David Palazzolo

Joseph Kelly Hearnsberger

Sriram Venkat

Takashi Shimamura

Yuuji Yamada

John Clements

Hideyuki Nakagawa

Masahiro Honda

Cheng Li

Takahiro Yamada

Kazuki Ikari

Naoyuki Ohta

Akinori Nakai

A refrigerant flow path switching device includes: a first header pipe that is connected to a high-and-low-pressure gas connection pipe of a heat source unit in an air conditioner; a second header pipe that is connected to a sucked-gas connection pipe of the heat source unit; a third header pipe that is connected to a liquid connection pipe of the heat source unit; switching units that each correspond respectively to utilization units in the air conditioner and include valves that control refrigerant flows; and a casing accommodating the first header pipe, the second header pipe, the third header pipe, and switching units. The refrigerant flow path switching device switches among refrigerant flow paths, each of which is between the heat source unit and one of the utilization units.

Refrigerant flow path switching device and air conditioning system

An HVAC system is provided. Embodiments of the present disclosure generally relate to an HVAC system in which a first controller is configured to provide a communicating protocol to a first HVAC component and a second controller is configured to receive a communicating protocol from the first controller and output an on/off protocol to a second HVAC component.

System and method for heating and cooling

An HVAC system is provided. Embodiments of the present disclosure generally relate to an HVAC system in which multiple indoor units are coupled to central outdoor unit, where at least one of the indoor units is configured to provide conditioned air through ductwork and at least one indoor unit is configured to provide conditioned air without ductwork. Moreover, a gas furnace can be provided in the system, for harsher environments that benefit from more robust heating. Additional systems, devices, and methods are also disclosed.

An air conditioning system includes an outdoor unit, indoor units, a controller that controls the outdoor unit, and an equipment controller. The equipment controller stores a set lower limit value that is set to maintain a pressure difference between the high pressure and the low pressure in the outdoor unit at a predetermined value or greater. The lower limit value is set to be smaller as a minimum cooling capacity increases. The minimum cooling capacity is the minimum value of a cooling capacity of an indoor unit arrangement formed by the indoor units. When starting a cooling operation, the equipment controller determines whether or not to perform pressure difference control for limiting decreases in the pressure difference of the outdoor unit based on whether or not the temperature of water flowing into the outdoor unit is less than the set lower limit value.

Air conditioning system

Growing community of inventors

Osaka, Japan

Hiroyuki Imada