JPH0281205U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a vehicle air conditioner according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... Differential circuit section for vehicle interior temperature control, 20... AND circuit section, 30... Clutch-off circuit section, 40... Monostable multivibrator circuit section, 50... Differential circuit section for off-time switching control, 60... Time constant switching circuit section.

Claims (1)

[Claims for Utility Model Registration] 1. A clutch-off request circuit section that outputs a clutch-off request signal over the off-time based on the acceleration state of the vehicle; a clutch-off circuit section that turns off a clutch that drives a compressor for temperature adjustment; an off-time switching control circuit section that outputs an off-time switching signal based on a set temperature for vehicle air conditioning; and the off-time switching signal. and an off-time reduction circuit section that reduces the off-time according to the invention. 2. A monostable multivibrator circuit section that includes an RC circuit having a time constant and outputs a clutch-off request signal over an off time specified by the time constant when the vehicle is once accelerated; and the clutch-off request signal. a clutch-off circuit section that receives the signal and turns off a clutch that drives a compressor for regulating the vehicle interior temperature during the off time; a differential circuit section for off-time switching control whose reference voltage is a voltage value corresponding to the reference temperature for off-time switching, and a differential output signal from the differential circuit section for off-time switching control; and a time constant switching circuit section that switches the time constant of the RC circuit to a smaller time constant than when the differential output signal is "0" to shorten the off time when the differential output signal is "1". An acceleration off device featuring: 3 In-vehicle temperature where the first input voltage is a detected temperature voltage value based on the temperature detected by a temperature sensing element installed in the vehicle, and the first reference voltage is a set temperature voltage value based on the set temperature value for the vehicle. It includes a control differential circuit section and an RC circuit having a time constant, and once the vehicle is accelerated, it outputs a clutch-off request signal of logic "0" over an off time specified by the time constant. a monostable multivibrator circuit section for output; an AND circuit section for ANDing the output signal from the in-vehicle temperature control differential circuit section and the output signal from the monostable multivibrator circuit; Output signal is logic
0'', a clutch-off circuit unit that turns off a clutch that drives a compressor for adjusting the temperature inside the vehicle over the off-time; a voltage value corresponding to the set temperature is set as a second input voltage; A differential output signal from an off-time switching control differential circuit section that uses a set off-time switching reference voltage value as a second reference voltage, and a differential output signal from the off-time switching control differential circuit section. and a time constant switching circuit section that switches the time constant of the RC circuit to a smaller time constant than when the differential output signal is "0" to shorten the off time when the differential output signal is "1". 4. The vehicle air conditioner according to claim 3, wherein the resistor that defines the time constant in the RC circuit is of a variable type. harmonization device.