WO2003101769A1 - Condenser for car air conditioning system - Google Patents

Condenser for car air conditioning system Download PDF

Info

Publication number
WO2003101769A1
WO2003101769A1 PCT/EP2003/005003 EP0305003W WO03101769A1 WO 2003101769 A1 WO2003101769 A1 WO 2003101769A1 EP 0305003 W EP0305003 W EP 0305003W WO 03101769 A1 WO03101769 A1 WO 03101769A1
Authority
WO
WIPO (PCT)
Prior art keywords
manifold
condenser
tubes
conditioning system
car
Prior art date
Application number
PCT/EP2003/005003
Other languages
French (fr)
Inventor
Bjørn VESTERGAARD
Original Assignee
Norsk Hydro Asa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Norsk Hydro Asa filed Critical Norsk Hydro Asa
Priority to AU2003240635A priority Critical patent/AU2003240635A1/en
Publication of WO2003101769A1 publication Critical patent/WO2003101769A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator

Definitions

  • the invention relates to a car provided with an air-conditioning system comprising at least one condenser having a first manifold and a second manifold and a number of heat exchanging tubes extending in a general parallel relationship between the first and the second manifold.
  • Such a car is generally known.
  • the arrangement is such that the manifold are formed by two generally tube-like manifolds, which are positioned with their longitudinal axis in the vertical direction, and the heat exchanging tubes are positioned in a horizontal position.
  • the refrigerant flow follow a zig-zag pattern flowing from the top to the bottom of the heat exchanger.
  • each manifolds is arranged in a general horizontal plane, the first manifold being used as inlet manifold for the cooling fluid in the system and being located above the second manifold.
  • the second manifold can be used as a receiver for sub-cooled refrigerant.
  • the physical size of the second manifold can therefore have a larger internal volume than the first manifold.
  • the flow of the fluid is improved by the gravity force, thereby reducing the pressure loss, whereas during the downward movement of the fluid the same is condensating while forming droplets, resulting in an improved heat exchange between the fluid and the surrounding air compared to film condensation.
  • the condenser of the air conditioning system of the car is made as a parallel flow condenser so that only a downwardly directed flow of the fluid inside the condenser takes place.
  • tubes can be advantageously be made as multiple port extruded tubes, fins being positioned between each pair of neighboring tubes.
  • each manifold of a tube-like member forming an endless loop.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Car provided with an air-conditioning system comprising at least one condenser having a first manifold and a second manifold, and a number of heat exchanging tubes extending in a general parallel relationship between the first and the second manifold.

Description

CONDENSER FOR CAR AIR CONDITIONING SYSTEM
The invention relates to a car provided with an air-conditioning system comprising at least one condenser having a first manifold and a second manifold and a number of heat exchanging tubes extending in a general parallel relationship between the first and the second manifold.
Such a car is generally known.
In the air-conditioning systems used in the known cars the arrangement is such that the manifold are formed by two generally tube-like manifolds, which are positioned with their longitudinal axis in the vertical direction, and the heat exchanging tubes are positioned in a horizontal position.
This relative position of the manifolds and the tubes is generally the cause of somehow increased pressure drop, because the refrigerant is first distributed through the manifolds (vertical) into the heat exchanger tubes (horizontal) and collected in the other manifold (vertical) and once again distributed into heat exchanger tubes (horizontal). Depending on the number of passages in the heat exchanger above scenario can be repeated more times.
The refrigerant flow follow a zig-zag pattern flowing from the top to the bottom of the heat exchanger.
It is therefor an object of the invention to provide a car as described above in which these problems are avoided.
This object is achieved in that each manifolds is arranged in a general horizontal plane, the first manifold being used as inlet manifold for the cooling fluid in the system and being located above the second manifold.
The second manifold can be used as a receiver for sub-cooled refrigerant. The physical size of the second manifold can therefore have a larger internal volume than the first manifold. The flow of the fluid is improved by the gravity force, thereby reducing the pressure loss, whereas during the downward movement of the fluid the same is condensating while forming droplets, resulting in an improved heat exchange between the fluid and the surrounding air compared to film condensation.
Preferably the condenser of the air conditioning system of the car is made as a parallel flow condenser so that only a downwardly directed flow of the fluid inside the condenser takes place.
Furthermore the tubes can be advantageously be made as multiple port extruded tubes, fins being positioned between each pair of neighboring tubes.
In order to improve the fluid distribution in the inlet manifold it is preferred to make each manifold of a tube-like member forming an endless loop.
As a result of this configuration it is possible to introduce the fluid to be condensed at one point in the first manifold, whereupon the fluid can flow in both directions and because of the closed loop equalize the flow and pressure conditions in the manifold.
In practice it is possible to use any shape of closed loop for the manifold tube such as round, oval, square etc., but it is preferred to use a compact configuration, e.g. formed by two parallel tube lengths in close contact to each other and two tube portions interconnecting the two end parts of the tubes. The general cross-section of the tube to be used for the manifold is not critical and well known to the man skilled in the art.

Claims

Claims
1. Car provided with an air-conditioning system comprising at least one condenser having a first manifold and a second manifold, and a number of heat exchanging tubes extending in a general parallel relationship between the first and the second manifold, characterized in that each manifold is arranged in a general horizontal plane, the first manifold being used as inlet manifold for the cooling fluid in the system and being located above the second manifold.
2. Car according to claim 1, characterized in that the condenser is a parallel flow condenser.
3. Car according to claim 1 or 2, characterized in that the tubes are multiple port extruded tubes.
4. Car according to claim 3, characterized in that fins are arranged between the parallel tubes.
5. Car according to any one of the preceding claims, characterized in that each manifold is made of a tube like member forming an endless loop.
PCT/EP2003/005003 2002-05-31 2003-05-09 Condenser for car air conditioning system WO2003101769A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003240635A AU2003240635A1 (en) 2002-05-31 2003-05-09 Condenser for car air conditioning system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20022607A NO20022607D0 (en) 2002-05-31 2002-05-31 Car equipped with air conditioning
NO20022607 2002-05-31

Publications (1)

Publication Number Publication Date
WO2003101769A1 true WO2003101769A1 (en) 2003-12-11

Family

ID=19913680

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/005003 WO2003101769A1 (en) 2002-05-31 2003-05-09 Condenser for car air conditioning system

Country Status (3)

Country Link
AU (1) AU2003240635A1 (en)
NO (1) NO20022607D0 (en)
WO (1) WO2003101769A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130982B (en) * 1959-08-14 1962-06-07 Otto Gerhard Tubular heater
EP0855567A2 (en) * 1997-01-24 1998-07-29 Modine Manufacturing Company Evaporator/condenser for a heat pump
US5894885A (en) * 1996-11-04 1999-04-20 Valeo Thermique Moteur Condenser having a simplified assembly for use in an air conditioning circuit for a vehicle
US5904206A (en) * 1998-02-25 1999-05-18 General Motors Corporation Heat exchanger flow tube with improved header to tube end stress resistance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130982B (en) * 1959-08-14 1962-06-07 Otto Gerhard Tubular heater
US5894885A (en) * 1996-11-04 1999-04-20 Valeo Thermique Moteur Condenser having a simplified assembly for use in an air conditioning circuit for a vehicle
EP0855567A2 (en) * 1997-01-24 1998-07-29 Modine Manufacturing Company Evaporator/condenser for a heat pump
US5904206A (en) * 1998-02-25 1999-05-18 General Motors Corporation Heat exchanger flow tube with improved header to tube end stress resistance

Also Published As

Publication number Publication date
NO20022607D0 (en) 2002-05-31
AU2003240635A1 (en) 2003-12-19

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