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Condenser for a motor vehicle air conditioning systemRelated Patent Categories: Refrigeration, Refrigeration Producer, Compressor-condenser-evaporator Circuit, Condensed Liquid Receiver, E.g., Surge TankCondenser for a motor vehicle air conditioning system description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060185385, Condenser for a motor vehicle air conditioning system. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS [0001] The right of foreign priority is claimed under 35 U.S.C. .sctn. 119(a) based on Federal Republic of Germany Application No. 10 2005 005 187.1, filed Feb. 3, 2005, the entire contents of which, including the specification, drawings, claims and abstract, are incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] The present invention relates to a condenser for an air conditioning system of the type generally disclosed in commonly-owned DE 199 12 381 A1. [0003] Condensers for air conditioning systems of motor vehicles generally have the flow passing through them from the top to the bottom in multiple flow paths or passes, with the lower region of the condenser having a supercooling section in which the refrigerant is cooled to below the condensation temperature. Cross-flow condensers of this type, which also typically have an integrated collector with a dryer, are disclosed in commonly-assigned DE 103 06 192 A1; DE 103 38 526 A1 and DE 198 48 744 A1. In the case of certain installation situations in the vehicle, this design with the supercooling section situated at the bottom is less advantageous, namely, if a further heat exchanger, for example, a charge air cooler, is connected upstream of the condenser (in terms of air-flow) in the lower end surface region. In this case, the supercooling section of the condenser is not sufficiently cooled. Condensers with a supercooling segment situated at the top have therefore already been proposed, as disclosed in commonly-assigned DE 198 30 329 A1 and DE 199 12 381 A1, the disclosures of which are also incorporated herein by reference. In the first case, the known cross-flow condenser has a condensation section, which is situated in the lower portion and through which the flow passes from the top to the bottom, and a supercooling section, which is situated at the top and is connected to the lower region of the collector via a refrigerant line arranged in the collector or in the collecting pipe. In the second case, the condenser developed by the present assignee has a condensing section, which is situated in the lower region and through which the flow passes from the bottom to the top, i.e., the refrigerant leaves the condensing section in the upper region and then passes into a collector which accommodates a dryer-filter insert which has an ascending pipe passing through it. The dryer-filter insert is arranged in the lower region of the collector, while there is space in the central region of the collector to receive liquid and gaseous refrigerant. Arranged below the dryer is a deflecting space from which liquid refrigerant passes, via the ascending flow pipe and via an upper chamber in the collector, into the supercooling segment situated at the top. SUMMARY OF THE INVENTION [0004] It is one object of the present invention to provide an improved condenser of the general type mentioned at the beginning, particularly regarding its collector, the refrigerant flow path in the collector and the degassing of the refrigerant. [0005] In accordance with one aspect of the invention, there is provided a condenser for use in a vehicle air conditioning system, comprising: a finned tube block having horizontally running tubes, and a header tube at each end of the tubes in the tube block, the finned tube block comprising a condensing section and a supercooling section arranged above the condensing section; and a collector arranged parallel to one of the header tubes, wherein the collector includes a dryer-filter insert, a stopper and an ascending flow pipe, the collector being connected for refrigerant flow via a first overflow opening communicating with the condensing section and via a second overflow opening communicating with the supercooling section, wherein an inflow chamber is defined in the region of the first overflow opening in the collector and is bounded by the stopper on the upper side and is bounded by the dryer-filter insert on the lower side. [0006] In accordance with another aspect of the invention, there is provided a condenser for use in a vehicle air conditioning system, comprising: a finned tube block having horizontally running tubes, and a header tube at each end of the tubes in the tube block, the finned tube block comprising a condensing section and a supercooling section arranged above the condensing section; and a collector arranged parallel to one of the header tubes and being connected for refrigerant flow via a first overflow opening communicating with the condensing section and via a second overflow opening communicating with the supercooling section, wherein the collector includes a dryer-filter insert, an ascending flow pipe and a downward flow pipe having a first inlet pipe end connected to the first overflow opening. [0007] According to another aspect of the invention, there is provided a condenser for use in a vehicle air conditioning system, comprising: a finned tube block having horizontally running tubes, and a header tube at each end of the tubes in the tube block, the finned tube block comprising a condensing section and a supercooling section arranged above the condensing section; a collector arranged parallel to one of the header tubes, wherein the collector includes a dryer-filter insert, a stopper and an ascending flow pipe, the collector being connected for refrigerant flow via a first overflow opening communicating with the condensing section and via a second overflow opening communicating with the supercooling section; and a refrigerant flow arrangement located in the collector for decreasing the flow velocity of the refrigerant, after it exits the first overflow opening, by an amount sufficient to permit at least some gaseous phase refrigerant to separate from liquid refrigerant. [0008] Further objects, features and advantages of the present invention will become apparent from the detailed description of preferred embodiments that follows, when considered together with the accompanying figures of drawing. BRIEF DESCRIPTION OF THE DRAWINGS [0009] In the drawings: [0010] FIG. 1 is a perspective view showing a cross-flow condenser with a supercooling segment situated at the top and with a laterally arranged, integrated collector; [0011] FIG. 2 is a cut-away view showing the collector with an adjacent collecting pipe; [0012] FIG. 3 is a cut-away view showing the collector with a down pipe (second exemplary embodiment of the invention); [0013] FIG. 4 is a cut-away view showing the collector according to FIG. 3, with views of the stopper and dryer-filter; [0014] FIG. 5 is a cut-away view showing the collector with the down pipe passing through the dryer-filter (third exemplary embodiment of the invention); and [0015] FIG. 6 is a cut-away view showing the collector according to FIG. 5, with views of the stopper and dryer-filter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0016] According to one preferred embodiment the invention, an inflow chamber is situated in the collector in the region of the overflow opening for the refrigerant from the condensing section. The inflow chamber is upwardly bounded by a stopper and downwardly bounded by the dryer. The refrigerant entering the inflow chamber is therefore distributed uniformly over the entire cross section of the collector and then enters the dryer, through which the refrigerant inevitably passes from the top to the bottom. In the process, the refrigerant is dried and filtered. The dryer is therefore situated in the central to upper region of the collector, i.e., directly below the overflow opening from the condensing section. An effective drying of the refrigerant is therefore achieved. [0017] In one preferred embodiment of the invention, a storage space for the refrigerant is provided below the dryer-filter insert and serves not only to store refrigerant but also to degas the refrigerant. Owing to the retarded flow velocity of the refrigerant, gas bubbles can separate from the liquid and can rise upwardly. [0018] In a further preferred embodiment of the invention, the ascending pipe passing through the dryer-filter insert is connected at a lower end to the storage space and is connected at its upper end to a stopper which causes the refrigerant to be deflected into the supercooling section. The stopper is inserted into the collector and is sealed circumferentially via an O-ring, between the two overflow openings. This prevents refrigerant, which enters the collector from the condensing section, from passing directly into the supercooling section, i.e., without being dried, filtered and degassed. [0019] According to a further preferred aspect of the invention, a downward flow pipe is provided in the collector and is connected--indirectly--via a stopper to the overflow opening of the condensing section and conducts the refrigerant as far as the dryer-filter. This affords the advantage that a mixing of gaseous and liquid phase of the refrigerant is restricted. Continue reading about Condenser for a motor vehicle air conditioning system... Full patent description for Condenser for a motor vehicle air conditioning system Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Condenser for a motor vehicle air conditioning system patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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