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Evaporator for a refrigeration appliance

a technology for refrigeration appliances and evaporators, which is applied in the field of evaporators for refrigeration appliances, can solve the problems of system loss efficiency and high load loss, and achieve the effects of less load loss, improved performance and low cos

Inactive Publication Date: 2006-10-12
MULTIBRAS SA ELETRODOMESTICOS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is about an evaporator for a refrigeration appliance. It has a tube extension with two different sized parts that are arranged in series. This design ensures that the refrigerant fluid flows through the tube at a uniform speed, without affecting the flow rate between the inlet and the outlet. This results in improved efficiency of the evaporator."

Problems solved by technology

In order to maintain the flow rate, the refrigerant fluid significantly accelerates and the high speed tends to produce a higher load loss, making the system lose efficiency.

Method used

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  • Evaporator for a refrigeration appliance
  • Evaporator for a refrigeration appliance

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Embodiment Construction

[0012] In order to comply with the proposed objects, the evaporator of the present invention comprises a tube extension 10, presenting an inlet 11 for the refrigerant fluid in liquid state and an outlet 12 for the refrigerant fluid in gaseous state, said tube extension 10 being formed by at least two tube portions 10a, 10b with different diameters and which are connected in series, in order to conduct a refrigerant fluid from the refrigerating system to which the evaporator is operatively associated, the different diameters being dimensioned to guarantee, to the refrigerant fluid flow, a more uniform speed along the different tube portions, without altering the flow rate of this refrigerant fluid between the inlet 11 and the outlet 12 of the tube extension 10.

[0013] The dimensioning of the diameter for each tube portion 10a, 10b is determined so that said diameter is progressively increased as the refrigerant fluid is conducted from the inlet 11 to the outlet 12 of the tube extensi...

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Abstract

An evaporator for a refrigeration appliance comprising a tube extension presenting an inlet (11) for the refrigerant fluid in liquid state and an outlet (12) for the refrigerant fluid in gaseous state, said tube extension (10) comprising at least two tube portions (10a, 10b) arranged in series and having different diameters which are dimensioned to guarantee, to the refrigerant fluid flow, a more uniform speed in the interior of the evaporator, without altering the flow rate of this refrigerant fluid between the inlet (11) and the outlet (12) of the tube extension (10).

Description

FIELD OF THE INVENTION [0001] The present invention refers to an evaporator for a refrigeration appliance, for example of the type used in a refrigeration circuit of refrigerators and freezers and other refrigeration appliances. The invention is particularly related to an evaporator comprising an assembly of tubes arranged in series, through which a refrigerant fluid is forced to pass. PRIOR ART [0002] Several evaporators known in the art use tubes made of steel, aluminum, copper or plastic material to conduct the refrigerant fluid, which exchanges heat with a secondary surface or with the air, in order to refrigerate the air in contact with the evaporator or with the loads deposited in an ambient refrigerated by said evaporator. [0003] There are several evaporator constructions which utilize these tubes, such as the evaporators of the tube-fin, tube-wire, and tube-plate types. In order to simplify manufacture, these evaporators are produced with a constant tube diameter. The intern...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25B39/02F25B41/00F28F13/08
CPCF25B39/02F25B41/003F28F13/08F28D2021/0071F25B2500/01F25D19/00
Inventor MARQUES, MARCO EDUARDO
Owner MULTIBRAS SA ELETRODOMESTICOS