| 摘要 |
PURPOSE:To maintain the car room temperature distribution at a comfortable state by constructing to control the blow-off air distribution to compute proportionally and integrally the difference between a target value of car room temperature distribution and an actual value and reduce the difference in accordance with the sum thereof. CONSTITUTION:The difference DELTAT between a target temperature T set at an operation part 4 and an average car room temperature Tr are inputted in a control part 3 to obtain the sum of results of proportional and integral computations in a PI computation part, and each part of a heat-exchanging part 1 is controlled to send a heat amount Q proportional to a result thereof X into a car room. Meanwhile, a blow-off control door 31 is controlled for operation to keep the difference between an upper blow-off port temperature Tu and a lower blow-off temperature TL at the optimum value for distributing the heat amount Q to upper and lower blow-off ports. This construction permits to maintain the car room always at a comfortable temperature distribution. |
