On-board air conditioning system

An on-board air conditioning system, comprising:

• an air conditioner configured to air condition a vehicle compartment;
• an air conditioner controller configured to control the air conditioner so as to match a vehicle compartment temperature to a desired temperature;
• at least one illumination light emitter mounted on at least one of a driver seat door, a front passenger seat door, and a center cluster;
• and
• an illumination light controller configured to control the at least one illumination light emitter, the illumination light controller having a memory that stores a set temperature, wherein
• the air conditioner controller is further configured to regularly or irregularly notify the illumination light controller of a value of the desired temperature, and when the value of the desired temperature is set by a user, transmit a change signal to the illumination light controller,
• the illumination light controller, in response to receipt of the change signal, compares the value of the set temperature stored in the memory with the notified value of the desired temperature, and when the notified value of the desired temperature differs from the value of the set temperature stored in the memory, updates the memory to change the stored value of the set temperature to the notified value of the desired temperature, and
• under a condition that air conditioning is performed by the air conditioner, the illumination light controller causes the at least one illumination light emitter to illuminate in a first color when the vehicle compartment temperature is lower than the set temperature by a predetermined degree or more, and causes the at least one illumination light emitter to illuminate in a second color different from the first color when the vehicle compartment temperature is higher than the set temperature by the predetermined degree or more.