2results about How to "Control work status" patented technology

This invention relates to the field of multi-split air conditioning system technology, specifically to a disturbance control method for the outer loop electronic expansion valve of an air conditioning system. The problem this invention addresses is how to actively eliminate oil and refrigerant blockage and reduce exhaust temperature during defrosting or oil return processes through forced disturbance control of the outer loop electronic expansion valve. To solve this problem, this invention provides a control method comprising: acquiring the operating status parameters of the air conditioning system; determining whether the air conditioning system has triggered a disturbance program based on the status parameters; correcting the reference setting based on the exhaust temperature, compressor return superheat, and oil separator return oil temperature during the execution of the disturbance mode; determining whether to exit the disturbance program based on the exhaust temperature and the execution duration of the disturbance program during defrosting and oil return modes; and automatically exiting the disturbance program when the air conditioning system exits the defrosting or oil return mode.

This utility model discloses an audible and visual alarm device, comprising: a monitoring unit for converting acquired image data into digital signals; a switching unit connected to the monitoring unit to generate a first electrical signal or a second electrical signal; a control unit connected to the switching unit to generate a low-frequency alarm signal based on the first electrical signal; and an alarm unit connected to both the switching unit and the control unit to generate a light signal based on the first electrical signal and a low-frequency buzzer based on the low-frequency alarm signal, or, the alarm unit generating a light signal and a low-frequency buzzer based on the second electrical signal. This utility model controls the warning states of three indicator lights and the operating states of the low-frequency and high-frequency buzzers by controlling the corresponding on / off states of a control relay module, thereby enabling the classification of alarm events based on alarm indications and improving event processing efficiency.