Carrier Corporation

Catexel Limited

Xiaohong Wang

Guangyu Shen

Hui Zhai

Liang Chang

Jian Ni

Qing Lu

Ronald Hage

Wei Zhao

Jean Hypolites Koek

Jianrong Zhang

Stephen William Russell

Lodewijk Van Der Wolf

A heat cycle system and a control method. The heat cycle system includes: driving devices, one or a plurality of outdoor units, and a plurality of indoor units, which are connected by pipelines; a bypass pipeline for the plurality of indoor units, a bypass valve being disposed in the bypass pipeline; a pressure sensor that senses a pressure difference &#x394;Pacross the plurality of outdoor units; and a controller that is preset with a pressure difference set value &#x394;P, wherein the controller calculates a pressure offset parameter &#x394;P=&#x394;P&#x2212;&#x394;Pand adjusts an opening degree of the bypass valve based on the pressure offset parameter &#x394;P so that the pressure offset parameter &#x394;P approaches zero, and wherein the controller is preset with a first pressure offset threshold P, and the controller is configured such that closed indoor units enter a bypass mode one by one when &#x394;P&#x3e;P, until &#x394;P&#x2264;P.

Thermal cycling system and control method of the thermal cycling system

An air conditioning system and a control method thereof. The air conditioning system includes: a plurality of indoor units connected in parallel; a plurality of outdoor units connected in parallel; and a coolant circulation circuit which circulates coolant through each of the indoor units connected in parallel and each of the outdoor units connected in parallel respectively, and which exchanges heat with each of the indoor units and each of the outdoor units; wherein the air conditioning system further includes a controller which, based on a number of actively operating indoor units, a total number of the indoor units and a total number of the outdoor units, defines an upper limit of a number of actively operating outdoor units, so that the flow rate of the coolant flowing through the actively operating outdoor units is not lower than a preset flow rate.

Air conditioning system and control method therof

The present invention provides improved processes for the synthesis of 1,4-ditosyl-1,4,7-triazacyclonone, comprising deprotecting a compound of formula (C): wherein P is tosylate or arylsulfonate, with an acidic medium to form 1,2-bis(1,4,7-triazacyclonon-1-yl)-ethane; and subsequently adding formaldehyde and formic acid to the acidic medium to form 1,2-bis-(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)-ethane (Me-DTNE). The syntheses of intermediates are also disclosed.

1,2-bis-(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)-ethane and intermediate for the synthesis of same

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Shanghai, China

Xiaohong Wang