Vehicle air conditioning system

Abstract

To provide a vehicular air conditioner which achieves both the improvement of antifogging performance of vehicle window glass and the reduction of energy consumed for heating.SOLUTION: In an air-conditioning case 31, there are formed a first air passage 31a, a second air passage 31b, an upper layer-side air passage 31c, a lower layer-side air passage 31d, an external air bypass passage 31e, and an internal air bypass passage 31f. During a heating mode, internal air from which heat is absorbed by a refrigerant of a heat pump cycle 10 in a first heat exchange part 15a arranged in the first air passage 31a, and external air from which heat is absorbed by the refrigerant in a second heat exchange part 15b arranged in the second air passage 31b are caused to flow out of a cabin. Further, external air guided to the upper layer-side air passage 31c through the external air bypass passage 31e is caused to flow out to a vehicle window glass 51 side in the cabin. Internal air guided to the lower layer-side air passage 31d through the internal air bypass passage 31f is caused to flow out to an occupant side in the cabin.SELECTED DRAWING: Figure 7

Claims

1. An air passage forming section (30) that forms an air passage for circulating air, It includes a heat pump cycle (10) that adjusts the temperature of the air blown into the vehicle cabin, The heat pump cycle includes a compressor (11) that compresses and discharges a refrigerant, heating units (12, 20) that heat the air blown into the vehicle interior using the refrigerant discharged from the compressor as a heat source, a first pressure reducing unit (14a) that reduces the pressure of the refrigerant flowing out from the heating unit, a first heat exchange unit (15a) that exchanges heat between the refrigerant flowing out from the first pressure reducing unit and the air, a second pressure reducing unit (14b) that reduces the pressure of the refrigerant flowing out from the first heat exchange unit and the air, and a second heat exchange unit (15b) that exchanges heat between the refrigerant flowing out from the second pressure reducing unit and the air. The air passage forming section includes a first air passage (31a) where the first heat exchange section is located, a second air passage (31b) where the second heat exchange section is located, an upper air passage (31c) that guides the air heated in the heating section toward the vehicle window glass (51) side of the passenger compartment, a lower air passage (31d) that guides the air heated in the heating section toward the passenger side of the passenger compartment, an outside air bypass passage (31e) that bypasses the first and second heat exchange sections and guides the outside air, which is the air outside the passenger compartment, toward the inlet side of the upper air passage, and an inside air bypass passage (31f) that bypasses the first and second heat exchange sections and guides the inside air, which is the air inside the passenger compartment, toward the inlet side of the lower air passage. When the vehicle interior is heated, A vehicle air conditioning system that allows the interior air to flow into the first air passage, the interior air that has passed through the first heat exchange unit to flow out of the vehicle compartment from the first air passage, the outside air to flow into the second air passage, the outside air that has passed through the second heat exchange unit to flow out of the vehicle compartment from the second air passage, the outside air to flow into the outside air bypass passage, and the interior air to flow into the interior air bypass passage.

2. The air passage forming section has an interior air blowing section (37) that blows the air into the vehicle interior, The vehicle air conditioning system according to claim 1, wherein the indoor air supply unit has a first fan (37a) that draws in the outside air that has flowed through the outside air bypass passage and blows it toward the inlet side of the upper air passage, a second fan (37b) that draws in the inside air that has flowed through the inside air bypass passage and blows it toward the inlet side of the lower air passage, and a drive unit (37c) that drives both the first fan and the second fan in conjunction.

3. The vehicle air conditioning system according to claim 1, wherein the air passage forming section comprises an outside air blowing section (46a) that blows outside air to at least one of the inlet side of the second air passage and the inlet side of the outside air bypass passage, and an inside air blowing section (46b) that blows inside air to at least one of the inlet side of the first air passage and the inlet side of the inside air bypass passage.

4. An air passage forming section (30) that forms an air passage for circulating air, It includes a heat pump cycle (10) that adjusts the temperature of the air blown into the vehicle cabin, The heat pump cycle includes a compressor (11) that compresses and discharges a refrigerant, heating units (12, 20) that heat the air blown into the vehicle interior using the refrigerant discharged from the compressor as a heat source, a first pressure reducing unit (14a) that reduces the pressure of the refrigerant flowing out from the heating unit, a first heat exchange unit (15a) that exchanges heat between the refrigerant flowing out from the first pressure reducing unit and the air, a second pressure reducing unit (14b) that reduces the pressure of the refrigerant flowing out from the first heat exchange unit and the air, and a second heat exchange unit (15b) that exchanges heat between the refrigerant flowing out from the second pressure reducing unit and the air. The air passage forming section includes a first air passage (31a) where the first heat exchange section is located, a second air passage (31b) where the second heat exchange section is located, an upper air passage (31c) that guides the air heated in the heating section toward the vehicle window glass (51) side of the passenger compartment, a lower air passage (31d) that guides the air heated in the heating section toward the passenger side of the passenger compartment, and an outside air bypass passage (31e) that bypasses the first and second heat exchange sections and guides the outside air, which is the air outside the passenger compartment, toward the inlet side of the upper air passage. In the heating mode that provides heating to the vehicle interior, A vehicle air conditioning system that allows the interior air, which is the air inside the vehicle cabin, to flow into the first air passage, the interior air that has passed through the first heat exchange unit to flow out to both the outside of the vehicle cabin and the inlet side of the lower air passage, the outside air to flow into the second air passage, the outside air that has passed through the second heat exchange unit to flow out to the outside of the vehicle cabin, and the outside air to flow into the outside air bypass passage.

5. The air passage forming section has an interior air blowing section (37) that blows the air into the vehicle interior, The vehicle air conditioning system according to claim 4, wherein the indoor air supply unit has a first fan (37a) that draws in the outside air that has flowed through the outside air bypass passage and blows it toward the inlet side of the upper air passage, a second fan (37b) that draws in the indoor air that has flowed through the first air passage and blows it toward the inlet side of the lower air passage, and a drive unit (37c) that drives both the first fan and the second fan in conjunction.

6. The vehicle air conditioning system according to claim 4, wherein the air passage forming section has an outside air blowing section (46a) that blows outside air to at least one of the inlet side of the second air passage and the inlet side of the outside air bypass passage, and an inside air blowing section (46b) that blows inside air to at least the inlet side of the first air passage.

7. The air passage forming section has an exhaust air blowing section (45) that blows the air out of the vehicle compartment, The vehicle air conditioning system according to any one of claims 1 to 6, wherein the exhaust air blower unit draws in at least one of the air flowing out from the first air passage and the air flowing out from the second air passage and blows it out to the outside of the vehicle.

8. An air passage forming section (30) that forms an air passage for circulating air, It includes a heat pump cycle (10) that adjusts the temperature of the air blown into the vehicle cabin, The heat pump cycle includes a compressor (11) that compresses and discharges a refrigerant, heating units (12, 20) that heat the air blown into the vehicle interior using the refrigerant discharged from the compressor as a heat source, a first heat exchange unit (15a) that exchanges heat between the refrigerant flowing out of the heating unit and the air, a second pressure reducing unit (14b) that reduces the pressure of the refrigerant flowing out of the first heat exchange unit, and a second heat exchange unit (15b) that exchanges heat between the refrigerant flowing out of the second pressure reducing unit and the air. The air passage forming section has a first air passage (31a) in which the first heat exchange section is located, and a second air passage (31b) in which the second heat exchange section is located. When the vehicle interior is heated, A vehicle air conditioning system that allows outside air, which is the air outside the vehicle compartment, to flow into the first air passage, reheats the outside air heated in the first heat exchange unit in the heating unit and guides it to at least the vehicle window glass (51) side inside the vehicle compartment, allows at least one of the outside air and the inside air, which is the air inside the vehicle compartment, to flow into the second air passage, and discharges the air that has passed through the second heat exchange unit to the outside of the vehicle compartment from the second air passage.

9. The vehicle air conditioning system according to claim 8, wherein in the heating mode, the proportion of the internal air in the air flowing into the second air passage is increased as the internal temperature (Tr), which is the temperature of the air inside the vehicle, rises.

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