An intercooling heat pump combined system for a hybrid vehicle and a cooling and heating method thereof

Abstract

The invention discloses an intercooling heat pump combined system for a hybrid vehicle and a cooling and heating method thereof. The combined system includes an intercooling system and a heat pump system. The intercooling system includes an electronic water pump, an intercooler, a low-temperature radiator, a liquid storage Kettle, second three-way solenoid valve and temperature sensor, heat pump system including liquid receiver, compressor, condenser, damper, evaporator, fan, first controllable expansion valve, second controllable expansion valve, external heat exchange of heat pump The heat exchanger and the first three-way solenoid valve, the external heat exchanger of the heat pump is a water-cooled heat exchanger; when the heat pump system is cooling or heating, the coolant in the intercooling system is used for cooling or heating, and the coolant is controlled according to the engine speed circuit. The invention can avoid frosting on the surface of the external heat exchanger of the heat pump when heating in a low-temperature environment, and at the same time meet the dual requirements of the engine intake temperature and the comfort of the passenger compartment.

Description

technical field [0001] The invention relates to an engine cooling system and an air-conditioning system of a hybrid electric vehicle, in particular to an intercooler heat pump combination system for a hybrid electric vehicle and a cooling and heating method thereof. Background technique [0002] Traditional car heating usually uses the temperature of the engine coolant to heat through the warm air core. In extremely cold areas, PTC electric heating is also used for heating. Cooling uses condensing agents to cool through the refrigeration cycle. At present, some automobiles start to use heat pumps for heating and cooling to reduce heating energy consumption, such as a heat pump type automobile air conditioner disclosed in CN205403231U. The outdoor heat exchanger of this heat pump type automotive air conditioner is an air-cooled heat exchanger. When heating in a low-temperature environment, its surface is prone to frost, which reduces the heat exchange efficiency between it an...

AI Technical Summary

Problems solved by technology

In order to improve power, reduce knocking tendency, and reduce fuel consumption, water-cooled intercooler system is adopted by many enterprises as an important measure, but water-cooled intercooler system requires a low-temperature radiator (air-cooled radiator) to be arranged in the engine room In the front, the outdoor heat exchanger (that is, the heat pump external heat exchanger) of the heat pump air conditioner (that is, the heat pump system) is also arranged in the cabin. If the low-temperature radiator is arranged after the heat pump external heat exchanger, the low temperature The air inlet temperature of the radiator will be higher than 10°C, which will seriously affect the heat transfer performance of the water-cooled intercooler system and affect the intake air temperature of the engine. The effect is not good, the power consumption of the compressor increases, the air temperature of the external heat exchanger of the heat pump is higher than 5°C, and the comfort of the passenger compartment is poor; The problem with competing for top position with heat pump external heat exchangers

Images