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Air conditioning system for vehicle

Inactive Publication Date: 2009-08-20
CALSONIC KANSEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]Therefore, an object of the present invention is to provide an air conditioning system for a vehicle that achieves air-heating and air-cooling by using waste heat of a heat-pump type cooling unit and waste heat from a heating element in a vehicle driving system and can achieve a simple structure of the heat-pump type cooling unit.
[0032]According to this configuration, sufficient heating performance can be achieved under a very low temperature condition in a vehicle with little heat source because heat from the heat-pump type cooling unit and the heater can be used for air-heating during the air-heating operation.

Problems solved by technology

As a result, structure of the heat-pump type cooling unit C must be complex.

Method used

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  • Air conditioning system for vehicle
  • Air conditioning system for vehicle
  • Air conditioning system for vehicle

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first embodiment

[0052]an air conditioning system for a vehicle according to the present invention will be explained with reference to FIGS. 1 to 3. As shown in FIG. 1, the air conditioning system is combined of a heat-pump type cooling unit A and an air-heating circulation unit B1.

[0053]The heat-pump type cooling unit A includes a first circulation path 1. The first circulation path 1 is filled with first refrigerant (CO2). A compressor 2, a water-cooled condenser 3, an expansion valve (expansion unit) 4, an evaporator 5 and a accumulator 6 are provided on the first circulation path 1 in this order.

[0054]The compressor 2 inhales the relatively low-temperature and pressure first refrigerant and discharges the high-temperature and pressure first refrigerant after compressing it.

[0055]The water-cooled condenser 3 is arranged within an after-mentioned unit container 14 on the second circulation path 10. The first refrigerant output from the compressor 2 is cooled by the second refrigerant. Specifically...

second embodiment

[0092]Since other configurations in the present embodiment is equal or similar to those in the second embodiment, redundant explanations will be omitted by allocating identical numerals to the identical or similar configurations.

[0093]As shown in FIG. 8, operations during air-heating are almost the same as the second embodiment. As shown in FIG. 9, operations during air-cooling are almost the same as the second embodiment.

[0094]In the present embodiment, the heat-pump type cooling unit A can be simplified in the air-conditioning system that achieves air-heating and air-cooling by using the waste heat of the heat-pump type cooling unit A and the engine 22 as similarly as the second embodiment.

[0095]In the present embodiment, the internal heat exchanger 13A includes the heat exchanger 13c through which the third refrigerant flows and the heat exchanger 13c is provided on (within) the flowing path of the second refrigerant, more specifically within the unit container 14. Therefore, thi...

third embodiment

[0098]Specifically, a branching path 31, a fifth flow-path changeover valve (fifth flow-path changeover unit) 32 and a third pump 33 are further provided on the third circulation path 20. The branching path 31 divides the third circulation path 20 into a circulation system of the engine 22 and another circulation system of the heater core 24. The fifth flow-path changeover valve 32 changes over whether or not to flow the third refrigerant to the branching path 31. The third pump 33 is provided for the branching path 31. The branching path 31 is interposed between the fourth flow-path changeover valve 30 and the fifth flow-path changeover valve 32. It can be controlled by changing over the fourth flow-path changeover valve 30 and the fifth flow-path changeover valve 32 whether or not to flow the third refrigerant to the branching path 31. Although the fourth flow-path changeover valve 30 is used to close or open the flowing path in the above third embodiment, it is used to change ove...

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Abstract

An air conditioning system includes an air-cooling unit and an air-heating unit. On a first path in the cooling-unit, provided are a compressor for first refrigerant, a condenser for the first refrigerant, an expansion unit for the first refrigerant, and an evaporator to cool air. On a second path in the air-heating unit, provided are an air-conditioning radiator for second refrigerant, and a first valve for the second refrigerant (whether or not into the air-conditioning radiator) On a third path in the air-heating unit, provided are a driving-system heating element to heat third refrigerant, an internal heat exchanger to heat the third refrigerant, a heater core to heat air, a driving-system radiator for the third refrigerant, and a second valve for the third refrigerant (whether or not into the driving-system radiator). The air passing through the evaporator or the heater core is selectably sent into a vehicle compartment.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an air conditioning system for a vehicle that can achieve air-heating and air-cooling.[0003]2. Description of Related Art[0004]A conventional air conditioning system is disclosed in Japanese Patent Application Laid-Open Number 2002-98430. As shown in FIG. 18, the air conditioning system includes a heat-pump type cooling unit C and an air-heating circulation unit D. The heat-pump type cooling unit C has a first circulation path 100 along which first refrigerant circulates. The air-heating circulation unit D has a second circulation path 110 along which second refrigerant (water) circulates and a third circulation path 120 along which third refrigerant (water) circulates.[0005]A compressor 101, a heat-radiating side of an internal heat exchanger 102, an in-compartment heat exchanger 103, an expansion valve 104, an external heat exchanger 105 and an accumulator 109 are provided on the first...

Claims

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Application Information

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IPC IPC(8): F25B13/00
CPCB60H1/00899B60H2001/00928B60H1/3213
Inventor TAKAHASHI, TORAHIDE
Owner CALSONIC KANSEI CORP