| Heat exchanger -> Monitor Keywords |
|
|
  Heat exchangerRelated Patent Categories: Heat Exchange, Side-by-side Tubular Structures Or Tube Sections, With Manifold Type Header Or Header PlateHeat exchanger description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070144720, Heat exchanger. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to a heat exchanger having a pair of header tanks capable of having a sufficient strength so as to withstand even a high-pressure medium. [0003] 2. Description of the Related Art [0004] The restriction of the exhaust gas emitted from large trucks is increasing more and more every year. At the same time, the supercharge pressure and temperature of the intercooler of large trucks have increased remarkably as shown in FIG. 9. As a heat exchanger of this intercooler, a vertically long header tank 11 having a rectangular cross section shown in FIG. 10 is conventionally known. With the increase in supercharge pressure, however, this header tank 11 is deformed in an increased amount and may break under an excessively large load imposed on the root of the tubes. An example of this header tank is described in Japanese Unexamined Patent Publication No. 9-196594. SUMMARY OF THE INVENTION [0005] The object of this invention is to solve the problem described above and provide a heat exchanger having a header tank capable of sufficiently resisting an increased supercharge pressure. [0006] In order to solve the aforementioned problem, according to a first aspect of the invention, there is provided a heat exchanger employing a means wherein an outside portion of a cross section of the header tank substantially perpendicular to a longitudinal direction thereof which extends from one joint to the other where the tube is connected with the core plate including the cross section of a tank body is in the shape an ellipse or a polygon similar to an ellipse, and wherein the aspect ratio of an ellipse inscribed in the outside portion is between 0.95 and 1.05 inclusive. With this heat exchanger, the stress concentration at the joints between the core plate and the tube can be prevented on the one hand, and the sectional shape of the portion reinforced in strength by the tubes is not required to be limited on the other hand, thereby improving the design freedom. [0007] Also, in order to solve the aforementioned problem, according to another aspect of the invention, there is provided a heat exchanger wherein the cross section of the header tank substantially perpendicular to a longitudinal direction of the header tank is in the shape of an ellipse or a polygon similar to an ellipse, and the aspect ratio of an ellipse inscribed in the header tank is between 0.93 and 1.05 inclusive. [0008] In this heat exchanger, a header tank is provided in which stress concentration at the joint between the core plate and the tubes can be prevented, and therefore which has sufficient strength to resist an increased supercharge pressure. [0009] In order to solve the aforementioned problem, according to still another aspect of the invention, there is provided a heat exchanger wherein straight portions each making up a joint margin are formed at the joint between the core plate and the tank body. Therefore, a more reliable header tank is provided in which the joint area between the core plate and the tank body can be positively secured. [0010] In order to solve the aforementioned problem, according to yet another aspect of the invention, there is provided a heat exchanger wherein a cap is coupled to the openings at the ends of the cylindrical header tank. When the core plate and the tank body are coupled to each other, therefore, a jig can be inserted from the openings and pressure can be applied from both inside and outside the header tank, thereby making possible a positive coupling. [0011] The reference numeral inserted in parentheses following the name of each means described above indicates an example of correspondence with a specific means described in the embodiments below. [0012] The present invention may be more fully understood from the description of preferred embodiments of the invention, as set forth below, together with the accompanying drawings. [0013] BRIEF DESCRIPTION OF THE DRAWINGS [0014] FIG. 1 is a front view schematically showing a heat exchanger according to an embodiment of the invention. [0015] FIG. 2 is a sectional view taken along line A-A in FIG. 1. [0016] FIG. 3 is a diagram showing the relation between the aspect ratio of the inscribed ellipse of the header tank and the stress exerted on the tube root. [0017] FIG. 4A is a sectional view showing a header tank including a tank body having a semicircular cross section and a core plate having a cross section equivalent to one half of an octagon, wherein the straight portions of the tank body are located outside the straight portions, respectively, of the core plate. [0018] FIG. 4B is a sectional view showing a header tank including a tank body having a semicircular cross section and a core plate having a cross section equivalent to one half of an octagon, wherein the straight portions of the tank body are located inside the straight portions, respectively, of the core plate. [0019] FIG. 4C is a sectional view showing a header tank including a tank body having a semicircular cross section and a core plate having a cross section equivalent to one half of an octagon, wherein the straight portions of both the tank body and the core plate are extended radially outward. [0020] FIG. 5 is a sectional view of a header tank having an octagonal cross section. [0021] FIG. 6 is a sectional view showing the shape or a header tank on the side nearer to the tube than the tube root. [0022] FIG. 7 is a perspective view showing a header tank having, at each end thereof, an opening covered with a cap. Continue reading about Heat exchanger... Full patent description for Heat exchanger Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Heat exchanger 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. Start now! - Receive info on patent apps like Heat exchanger or other areas of interest. ### Previous Patent Application: Heat exchanger Next Patent Application: Heat exchanger, especially charge air cooler for motor vehicles Industry Class: Heat exchange ### FreshPatents.com Support Thank you for viewing the Heat exchanger patent info. IP-related news and info Results in 2.14038 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , |
||
