Vehicular air-conditioning system

a technology of air-conditioning system and vehicle, which is applied in the direction of indirect heat exchangers, machines/engines, light and heating apparatus, etc., can solve the problem of insufficient raising of air temperature, and achieve the effect of reducing temperature differences and easy guidan

Inactive Publication Date: 2012-07-19
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]According to this, the first heat exchange part uses the cooling water which cooled the cylinder block as the heat source to heat the blown air, then the second heat exchange part uses the cooling water after cooling the cylinder block, which is higher in temperature than the cooling water after cooling the cylinder head, as the heat source to further heat the blown air which was heated by the first heat exchange part, so it is possible to sufficiently raise the air temperature after passing through the heating-use heat exchanger.
[0034]According to this, it is possible to raise the flow velocity of the second liquid which flows into the inlet side tank part after passing through the flow velocity raising means (92) compared with before passing through it, so compared with the case of not providing means for raising the flow velocity of the cooling water, it is possible to run the cooling water to the side of the inlet side tank part away from the second liquid inlet. Accordingly, according to the present invention, it is possible to reduce the temperature difference of the cooling water flowing through the plurality of tubes and possible to reduce the temperature difference in the left-right direction occurring in the air-conditioned air after passing through the heating-use heat exchanger.

Problems solved by technology

As shown in the art described in U.S. Pat. No. 5,337,704, if heating the air blown into the passenger compartment using as a heat source only the cooling water which cooled the cylinder head, the problem arises that the air temperature cannot be sufficiently raised.

Method used

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Examples

Experimental program
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Effect test

first embodiment

[0059]FIG. 1 shows the schematic configuration of a vehicular air-conditioning system in the present embodiment. The vehicular air-conditioning system of the present embodiment is mounted in a hybrid vehicle which obtains drive power for driving the vehicle from an engine (internal combustion engine) and driving-use electric motor.

[0060]The vehicular air-conditioning system 1 of the present embodiment is provided with a heating-use heat exchanger 2 which exchanges heat between cooling water of an engine 30 and air blown into a passenger compartment so as to heat the air blown into the passenger compartment. Note that, the cooling water is water or water containing added ingredients.

[0061]The heating-use heat exchanger 2 has a first heater core 10 and a second heater core 20. The two are integrally formed. The first heater core 10 and the second heater core 20 respectively correspond to the first heat exchange part and the second heat exchange part of the heating-use heat exchanger i...

second embodiment

[0107]FIG. 6 is a cross-sectional view of the heating-use heat exchanger 2 in the present embodiment. FIG. 6 is a view seen along the same direction as FIG. 2.

[0108]In the present embodiment as well, as shown in FIG. 6, the second heater core 20 is slanted, so a liquid storage part 71 is formed in the region of the inlet side tank part 22 above the inlet side ends 21a of the tubes 21.

[0109]Furthermore, in the present embodiment, the positional relationship between the cooling water inlet 20a and the tubes 21 at the inlet side tank part 22 of the second heater core 20 is as follows: That is, as shown in FIG. 6, when projecting the cooling water inlet 20a at the longitudinal direction of the inlet side tank part 22, part of the cooling water inlet 20a (not hatched region in FIG. 6) is positioned below the inlet side ends of the tubes 21 (bottom end face) 21a.

[0110]Further, the majority of the cooling water inlet 20a (hatched region in FIG. 6) is positioned outside from between two im...

third embodiment

[0112]FIG. 7 is a cross-sectional view of a heating-use heat exchanger 2 in the present embodiment. FIG. 7 is a view seen along the same direction as FIG. 2.

[0113]In the present embodiment as well, as shown in FIG. 7, the second heater core 20 is slanted. In the same way as the first and second embodiments, a not shown liquid storage part is formed in the inlet side tank part 22 in the region above the inlet side ends 21a of the tubes 21.

[0114]Further, the positional relationship between the cooling water inlet 20a and the tubes 21 at the inlet side tank part 22 of the second heater core 20 is as follows:

[0115]That is, as shown in FIG. 7, when projecting the cooling water inlet 20a in the longitudinal direction of the inlet side tank part 22, part of the cooling water inlet 20a (non-hatched region in FIG. 7) is positioned right under the inlet side ends (bottom end faces) 21a of the tubes 21. The rest of the cooling water inlet 20a (hatched part in FIG. 7) is positioned other than r...

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Abstract

A heating-use heat exchanger which includes a first heater core which exchanges heat between a first liquid and air blown into a passenger compartment and a second heater core which exchanges heat between a second liquid which is higher in temperature and smaller in flow rate than the first liquid and blown air which is heated by the first heater core is held in an air-conditioning case so that an inlet side tank part is at the bottom and an exit side tank part is at the top and the tube longitudinal direction is slanted. Due to this, the high temperature second liquid flowing into the second heater core is stored inside of the inlet side tank part in a region above the tube inlet side ends over the entire stacking direction of the plurality of tubes, then flows into the plurality of tubes.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a vehicular air-conditioning system comprising a heating-use heat exchanger which heats air which is blown into a passenger compartment.[0003]2. Description of the Related Art[0004]As such vehicular air-conditioning systems, there are the ones described in U.S. Pat. No. 5,337,704 and European Patent Application Publication No. 1008471.[0005]In the system described in U.S. Pat. No. 5,337,704, as cooling water channels inside of the engine, there are the cylinder head-side channel which cools the cylinder head and the cylinder block-side channel which cools the cylinder block. The cooling water which passes through the cylinder head-side channel is designed to flow into a single heating-use heat exchanger.[0006]In the system described in European Patent Application Publication No. 1008471, two heating-use heat exchangers are provided for heating air. The cooling water which flows out from ...

Claims

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Application Information

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IPC IPC(8): F28D15/00
CPCB60H1/00328F01P3/02F01P2003/027F28D1/05366F28F9/02F28D1/0435F28D2001/026
InventorOTA, KOJINISHIKAWA, MICHIOKAKEHASHI, NOBUHARU
OwnerDENSO CORP