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Vehicle air-conditioning system employing tube-fin-type evaporator using hfo 1234yf material refrigerant

a technology of evaporator and tubefin, which is applied in the direction of indirect heat exchangers, light and heating apparatus, transportation and packaging, etc., can solve the problems of affecting the performance of the air conditioning system, restricting its use, and affecting the use of the system

Inactive Publication Date: 2011-04-14
HANON SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]An embodiment of the present invention is directed to providing an air conditioning system with a tube-fin type evaporator using HFO 1234yf refrigerant having totally different physical properties from conventional refrigerant containing R-134, CO2 or the like, which has an optimal design corresponding to a physical property of the used refrigerant.
[0011]In other words, even though the 1234yf refrigerant is an environment friendly material compared to the R-134a refrigerant, there is a problem that the performance of the air conditioning system using the 1234yf refrigerant is lower than that using the R-134a refrigerants. In order to solve the problem, considerable research and development is required. Meanwhile, it is possible to selectively optimize various parameters in the air conditioning system so as to overcome the different in performance. When considering a problem of cost increases with a change in the system, it is preferable to improve the performance without massive design change. The present invention intends to optimize a dimension range of each construction element of the evaporator and thus improve the performance without the massive design change.

Problems solved by technology

Especially, in case of refrigerant which is essentially used in an air conditioning and cooling system, for example, since CFC-based refrigerant containing chlorine destroys the earth's ozone layer, restrictions on its use are being spread.
In case of the conventional CFC-based refrigerant and the like, it has the excellent heat transfer characteristic, but since it has a harmful effect on the environment, its use is restricted.
In this case, the pressure drop of the refrigerant occurs excessively in the whole air conditioning system as well as the evaporator due to the increased flow rate, and thus the performance of the air conditioning system is considerably deteriorated.
In other words, even though the 1234yf refrigerant is an environment friendly material compared to the R-134a refrigerant, there is a problem that the performance of the air conditioning system using the 1234yf refrigerant is lower than that using the R-134a refrigerants.

Method used

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  • Vehicle air-conditioning system employing tube-fin-type evaporator using hfo 1234yf material refrigerant
  • Vehicle air-conditioning system employing tube-fin-type evaporator using hfo 1234yf material refrigerant
  • Vehicle air-conditioning system employing tube-fin-type evaporator using hfo 1234yf material refrigerant

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Embodiment Construction

[0033]100: evaporator[0034]10: header tank[0035]20: tube[0036]30: fin

DESCRIPTION OF SPECIFIC EMBODIMENTS

[0037]The advantages, features and aspects of the invention will become apparent from the following description of the embodiments with reference to the accompanying drawings, which is set forth hereinafter.

[0038]FIG. 2 is a perspective view of a general tube-fin type evaporator. The general tube-fin type evaporator includes a plurality of tubes 20 which are arranged in parallel along an air-blowing direction to be spaced apart from each other at regular intervals; a fin 30 which is interposed between the tubes 20 so as to increase a heat exchange surface area with respect to air flowing between the tubes 20; and a pair of header-tanks 10 which are coupled to both ends of the tube 20 so that a heat exchange medium is flowed therethrough.

[0039]Generally, in the tube-fin type evaporator, refrigerant flow is divided into four passes or six passes. FIG. 3A is a schematic view showing ...

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Abstract

Provided is an air conditioning system with a tube-fin type evaporator which obtains optimal performance The air conditioning system with the tube-fin type evaporator using HFO 1234yf refrigerant, which has totally different physical properties from conventional refrigerant containing R-134, CO2 or the like, has an optimal design corresponding to a physical property of the used refrigerant.

Description

CROSS-REFERENCE(S) TO RELATED APPLICATIONS[0001]The present invention claims priorities of Korean Patent Application Nos. 10-2008-0054190, filed on Jun. 10, 2008, 10-2009-0051426, filed on Jun. 10, 2009, and 10-2009-0051436, filed Jun. 10, 2009, which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a tube-fin type evaporator using HFO 1234yf refrigerant; and, more particularly, to an air conditioning system with a tube-fin type evaporator which obtains optimal performance when using HFO 1234yf refrigerant having entirely different physical properties from conventional refrigerant.[0004]2. Description of Related Art[0005]Recently, according to the rise of environmental issues, use of materials detrimental to the environment are prohibited or restricted. Especially, in case of refrigerant which is essentially used in an air conditioning and cooling system, for example, since CFC-based refrigerant con...

Claims

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Application Information

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IPC IPC(8): F25B1/00
CPCB60H1/00335F28D1/05391F28D2021/0085F25B2400/121F28F9/0209F25B9/002F25B39/02
Inventor LIM, HONG-YOUNGJEON, YOUNG-HAOH, KWANG HUNPARK, CHANG HOJEE, YONG JUN
Owner HANON SYST
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