MXPA98009200A - Air conditioning condenser, provided with a fluid tank exchange - Google Patents

Abstract

The present invention relates to a condenser for an air conditioning device, characterized in that it comprises a collecting box, a base secured to the collecting box and an elongated intermediate deposit which is fixed to said base for the treatment and accumulation of a fluid, said base having a first and a second connection tube for the transfer of fluid between the collection box and the intermediate reservoir, the intermediate reservoir has a first and a second end and an axial thread substantially close to the first end cooperating with the base to fix the intermediate tank, said connecting tubes extending to a point opposite the first end

Description

ARTIFICIAL CLIMATE CONDENSER. PROVIDED OF AN INTERCHANGEABLE FLUID DEPOSIT The invention relates to a condenser »mainly for cooling fluid in an artificial climate device for the interior of a motor vehicle» comprising a collector and an intermediate tank »arranged for the treatment and / or the accumulation of a fluid» connected to the collector by means of union ducts. In a capacitor of this type »as is well known» the intermediate tank can supply all the following functions or part of them? filtration and / or dehydration of the refrigerant fluid »compensation of the volume variations thereof» separation of the liquid and gaseous phases. Its intermediate position with respect to the condenser »allows it to circulate in the part of the same located downstream of the tank» only the fluid in liquid state »which in this way is subcooled below the liquid / gas equilibrium temperature» improving the operation of the condenser and making the connection relatively independent of the amount of fluid contained in the circuit. EP-A-0 480 330 describes »in an artificial vehicle climate condenser» an intermediate tank which is firmly fixed in a container integral with the collector »through which the two connecting ducts pass.

This tank is provided »at its lower end» with a head fixed to its wall »which is fixed on the seat by means of a screw. The connecting ducts extend partially in the seat and partially in the head of the tank. This known modality is relatively complex and large volume. In addition »to replace the tank» it is necessary to unscrew the fixing screw »which can cause serious difficulties» depending on the possibility of access in the vehicle. The invention mainly contemplates a condenser comprising a collecting box and an intermediate tank »arranged for the treatment and / or the accumulation of a fluid» which is firmly fixed to a base integral with the collecting box »traversed by two connecting ducts for the transfer of fluid between the collecting box and the tank. According to the invention, the tank is provided in the vicinity of one of its ends with an axial tapping which cooperates for its attachment to the seat, said connecting ducts extending therein until they meet the first end. Other optional features of the invention "complementary to alternatives" are listed below? - The collecting box is arranged side by side with the tank »and the tank is connected to the collecting box by a connecting flange in the vicinity of its second end.

- The tank has an axial tube for the fluid passage »protruding at its first end» to connect it to the interior of the seat »in a first of the connecting ducts. - The tank has at its first end openings for the passage of fluid »that surround the axial tube and that communicate with the second of the connecting ducts. - The first conduit extends substantially perpendicular to the longitudinal direction of the reservoir. - The second conduit is oblique with respect to the longitudinal direction of the reservoir »extending from the first conduit towards the hopper. - The first and second conduits are disposed »respectively» downstream and upstream of the reservoir. The reservoir comprises a transverse »fluid-permeable partition» which limits between the second end »a volume for accumulation of fluid» protected against turbulence produced by the circulation of fluid. - The seat is welded on the external face of a tubular wall that limits the collecting box. - The connecting conduits extend substantially tangential with respect to the tubular wall »and open laterally through it. The characteristics and advantages of the invention will be explained in more detail in the description that follows "with reference to the accompanying drawings" in which? Figure 1 is a front view of a condenser according to the invention Figure 2 is a top view of said condenser Figure 3 is a schematic of a refrigerant circuit incorporating the condenser Figure 4 is a perspective view of the condenser seat of Figures 1 and 2 Figure 5 is a sectional view in the middle of the seat Figure 6 is an axial sectional view of the reservoir »and Figure 7 is a view similar to Figure or» with respect to to a variant of the tank »which also shows the seat. Figure 3 is a schematic of a refrigerant fluid circuit forming part of an artificial climate device inside a motor vehicle. In a known manner, this circuit comprises successively a compressor 1, a unit 2, hereinafter referred to as a capacitor, an expander 3 and an evaporator 4. The capacitor 2 comprises an upstream section 2a, in which the refrigerant fluid transfers heat to an air flow »so that it condenses» after having been »if necessary» "de-superheated" from an inlet temperature higher than the liquid / gas equilibrium temperature. The section 2a is followed by an intermediate tank 2b »and then» by a downstream section 2c »in which the fluid is subcooled by changing heat with the air flow. An exemplary embodiment of the capacitor 2 is shown in its general structure in FIGS. 1 and 2. It comprises 2 collector boxes 3 »4» that are vertically elongated and offset relative to one another in a horizontal direction »connected together by a multiplicity of horizontal fluid circulation tubes 5. Each collection box is divided into different chambers by means of horizontal partitions 6 »so that the fluid circulates in the tubes 5» alternatively »from a chamber of the box 3 to a chamber of the box 4 and inversely »From the upper chamber of the box 4» communicating with an inlet tube 7 »to the lower chamber of the same box 4» communicating with an outlet tube ?. One of the intermediate partitions of the collecting box 3 »designated by the reference 6-í» separates from each other the chambers 9-1 and 9-2 »situated» respectively »above and below the partition 6-1» and which communicate between It is exclusively through the reservoir 2-b »which is arranged vertically and extends along the length of the box 3. As seen more particularly in the fi les 6 and 7» the reservoir 2b comprises a chest formed by a cylindrical body. 11 »which occupies most of its height» and a neck that narrows 12 »arranged in its lower part. The neck 12 »in turn has a region 13 provided with a male thread and» below said tapped male region »a region 14 of smaller diameter» recessed with two circumferential grooves for receiving two toroidal sealing joints 15. At its end bottom »the tank 2b has a transverse end wall 16» traversed on the one hand by an axial tube 17 protruding upwards inside the tank »and down» on the outside thereof »on the other hand» by openings 18 that they surround the tube 17. The tube 17 extends upwards to a perforated intermediate partition 19 which passes through to open into a free volume 20"between the partition 9 and the upper end of the tank" and which extends in most part of the container. the height of this one. Two fluid-permeable washers 21 »22» surround the tube 17 and rest »respectively» upwards on the partition 19 and »downwards» on a shoulder connecting the regions 13 and 14 »limiting an annular volume between them of treatment 23 »provided with particles 24» suitable for filtering and / or dehydrating the fluid. The deposit 2b is in mechanical and fluid communication with the collecting box 3 »by means of a seat 30» which is represented by the same in figures 4 and 5. This seat is preferably a piece of aluminum alloy »which defines a wall 31 »substantially of revolution around a vertical axis 32» which limits an upwardly open housing 33 »for the neck of the reservoir 2b. The lateral surface of the housing 33 has, in an upper region, a female thread 34 which cooperates with the tapping 13 of the reservoir. A cylindrical middle region 35 cooperates with the sealing joints 15 »and a cylindrical lower region 36 surrounds the tube 17 and borders it» whose free end is supported on a seat 37 »provided on the bottom of the housing 33» of an annular space 38. On the wall 31 a veil 39 is attached, which extends substantially following a plane passing through the axis 32. This veil has »a slit and another of said plane» dilatacians 40 which allow to accommodate two ducts 41 »42» thened parallel to that flat. At an intermediate stage of the manufacture of the seat »as shown in Figure 5» the duct 41 opens »at its two ends» respectively »into the housing 33» at the level of the annular space 3S »and at the free edge of the web 39 »And is leaning towards the top of one against the other. The conduit 42 extends horizontally from the free edge of the veil to below the housing 33"or forms an elbow towards the top to open to the bottom thereof" inside the annular seat 37. In the finished seat »the welded sleeves 43 »44» shown in figure 7 »tightly seal the free ends of the conduits 4i» 42 »and these empty into the exterisr exclusively by the passages 45» 46 »provided in the laminar protuberances 47» 48 »formed on the widens 40. The seat 30 is fixed on the collecting box 3 by welding the ends of the protuberances 47 »48» on the outer face of the tubular wall »of aluminum sheet of the channel» during the assembly of the capacitor by welding. The passages 45 and 46 »communicate with the chambers 9-1 and 9-2 respectively» of the fluid box »through openings provided in the tubular wall, the condemned fluid from the chamber 9-1 passes from it to the annular space 38 through the passage 45 and the inclined duct 41 »then enters the tank 2b» screwed into the seat »through the openings Í8. Then it passes through the volume 23 'where it is dried and filtered by the particles 24' and accumulates in the volume 20 'where the residual gaseous phase eventually comes together at the top. The fluid leaves the volume 20 »exclusively in liquid state» through the tube 17 »and reaches the chamber 9-2 of the collecting box 3» through the horizontal conduct 42 and the passage 46. In this way »the tubes 5 and the chambers of boxes 3 and 4 »located higher than the partition 6-1» included in chamber 9-1 »constitute the upstream section 2a of the condenser» while the tubes and chambers located below that partition »Including camera 9-2» constitute the downstream section 2c. A clamping flange 50 »mechanically connects the upper end of the reservoir 2b in the collecting box 3» for a more stable fixing of the reservoir.

In FIG. 7, a selective partition 51 is shown, which extends through the volume 20 a short distance above the partition 19. The partition 51 is fluid-permeable and shelters the upper region of the volume 20 from turbulence. facilitates gas / liquid separation. The replacement of the tank is particularly simple »since it suffices to unscrew the previous tank and screw the new one.

Claims (10)

IO NOVELTY OF THE INVENTION CLAIMS

1. - Condenser »especially for a cooling fluid in an artificial climate device for the interior of a motor vehicle» comprising a collecting box and an intermediate tank »arranged for the treatment and / or accumulation of a fluid» which is fixed in a manner fixed on a support seat of the collecting box »crossed by connecting tubes for the transfer of fluid between the collection box and the tank» characterized by said condenser because the deposit is provided in the vicinity of a first end thereof »of a tapping axial that cooperates for its fixation with the seat »extending the coneínán behaviors in this until it is with respect to said first end.

2. Condenser according to claim 1 »further characterized in that the collecting box is disposed side by side with the tank» and the tank is connected to the collecting box by means of a clamping flange »in the vicinity of its second end.

3. Condenser according to any of claims 1 and 2 »further characterized in that the tank has an axial fluid passage tube» that forms a projection on its first end »to connect inside the seat with a first conduit said connecting conduits.

4.- Condenser in accordance with the claim 3 »further characterized in that the tank has at its first end openings for the passage of fluid» that surround the axial tube and that communicate with the second of the connecting ducts.

5. Condenser according to any of claims 3 and 4 »further characterized in that the first conduit extends substantially perpendicular to the longitudinal direction of the reservoir.

6.- Condenser in accordance with any of the 3 to 5 »further characterized in that the second conduit is oblique with respect to the longitudinal direction of the reservoir» and moves away from the first conduit in the direction of the collecting box.

7. Capacitor according to any of claims 3 to 6 »further characterized in that the first and second conduits are respectively disposed downstream and upstream of the reservoir.

8. Condenser according to any of the preceding claims »further characterized in that the tank comprises a transverse» fluid-permeable partition »which limits between it and the second end a volume of accumulation of fluid protected from the turbulences produced by the circulation of the same.

9. - Condenser according to any of the preceding claims »further characterized in that the seat is welded on the external face of a tubular wall that limits the collecting box.

10. Condenser according to claim 9 »further characterized in that the connection conduits extend substantially tangentially with respect to the tubular wall» and open laterally through it. < fc