JPS5585839A - Air conditioning control system - Google Patents

Abstract

PURPOSE: To perform automatic air conditioning control by defining the upper limit and lower limit with a setting value as medium and making performance control within that range so that when the room temperature exceeded the upper limit after device stoppage for a given period of time, cooling is effected, and when the room temperature dropped below the lower limit, heating is effected.

CONSTITUTION: Setting temperature tS is input (101) at the start of the operation, and when parameter s is 0 (s=0 at the time of start and switch-over), room temperature tR is input (103) to judge whether s=0 by a step 104, and in the case of YES, the system line proceeds to the left to judge whether tR>tS by a step 106, thereby deciding the cooling mode or heating mode. The cooling mode is judged by a step 109, and when tR is between tRH, which is higher by C than tS, and tRL which is lower by C than tS (that is, when tRL≤tR≤tRH), an operation order is sent, and in the other times, a stop order is sent. During shutdown the shutdown, time is measured by a step 118, and when it lasts longer than Δt, the operation mode (wether the cooling mode or not) is judged (121) and when tRL≤tR≤tRH, input is given from line A₃ to continue operation, and in other times, input is given from line A₂ to change the operation mode.

COPYRIGHT: (C)1980,JPO&Japio