When diesel generator for home use runs, on the one hand, it draws part of the fresh air into the combustion chamber so that it is evenly mixed with the fuel in the combustion chamber for work, thus driving the diesel generator for home use group to run continuously, the amount of heat generated by diesel generator for home use must be released from the engine room in time to consume large amounts of cool air.

Therefore, in addition to having a good water or oil cooling structure, the cooling and ventilation systems in the diesel generator are also essential to ensure adequate air flow through the machine room, to supplement the air consumed in the combustion of the engine and to drain the heat from the diesel generator for home use out of the engine room through the radiator core, keep the temperature in the computer room as close as possible to the ambient temperature and keep the diesel generator temperature in the normal working range. When the condition of the machine room can not meet the requirement of the net area of the air inlet and outlet, the forced air inlet and outlet must be considered to ensure the normal combustion and cooling of the diesel generator.

When calculating the size of the air inlet, the invalid area occupied by the shutter and the metal mesh curtain must be considered. During the winter, when the diesel generator for home use group is used in standby mode, the diesel generator is only sporadically running, with standby downtime most of the time. Proper temperature should be kept in the engine room at all times to avoid affecting the normal starting capacity of the diesel generator or freezing the cooling water and causing damage to the diesel generator. This requires that all ventilation openings in the machine room must be adjustable so that the unit can be shut down automatically or manually. It is also recommended that the diesel generator be fitted with a water jacket heater and that it be kept in working order at all times.