York Guangzhou Air Conditioning and Refrigeration Co., Ltd.

Johnson Controls Technology Company

Tyco Fire + Security Gmbh

Demao Yu

Shuang Wu

Disclosed is a refrigeration system, comprising refrigeration system components, a connecting pipeline, a switch structure, and discharging channels (). The refrigeration system components comprise three heat exchangers (). The refrigeration system components can be connected via the connecting pipeline, and are combined into different working systems via the switch structure. When two heat exchangers are selected by the switch structure to form one working system and the saturation temperature corresponding to the internal pressure of the unselected heat exchanger is higher than the medium or environment temperature of the heat exchanger, a liquid refrigerant accumulates inside the non-working heat exchanger. According to the refrigeration system, the switch structure is arranged at either end of the non-working heat exchanger, so that the non-working heat exchanger is isolated from a working system cycle, and under the condition where the pressure at a low-pressure side (C; Q) of the working system is less than the internal pressure of the non-working heat exchanger, additional discharging channels () communicate with the non-working heat exchanger and the low-pressure side (C; Q) of the working system, so that the refrigerant accumulating in the non-working heat exchanger is transferred to the system cycle, avoiding a lack of refrigerant in the system cycle.

Refrigeration system

The present disclosure is directed to a method for controlling a system that includes a modular set having a plurality of variable frequency modular units. The method includes setting a load ratio range for the plurality of variable frequency modular units, inputting an energy adjustment amount, and setting different operations for the modular set based on the energy adjustment amount. During a first operation, a first frequency adjustment amount of a corresponding variable frequency modular unit is determined based on the energy adjustment amount and an operating position of the corresponding variable frequency modular unit. During a second operation, a second frequency adjustment amount of a corresponding variable frequency modular unit is determined based on the energy adjustment amount and the operating position of the variable frequency modular unit. The first operation or the second operation causes the variable frequency modular units to operate within the load ratio range.

Growing community of inventors

Wuxi, China

Demao Yu