Heat exchanger

Abstract

A heat exchanger, in which flowing medium flows, includes a first tank, a second tank, a core part and a flow accelerating means. The first tank is provided with an inlet port, the second tank being disposed apart from the first tank. The core part has a plurality of tubes and a plurality of fins. The tubes have both end portions being fluidically connected with the first tank and the second tank, respectively. Each of the fins is arranged between the adjacent tubes. The flow accelerating mean is provided inside the first tank so as to accelerate a flow speed of the flowing medium, which enters an inner space of the first tank through the inlet port, in the first tank in a longitudinal direction of the first tank.

1 . A heat exchanger, in which flowing medium flows, comprising:
 a first tank that is provided with an inlet port;   a second tank that is disposed apart from the first tank;   a core part that has a plurality of tubes and a plurality of fins, the tubes having both end portions being fluidically connected with the first tank and the second tank, respectively, and each of the fins being arranged between the adjacent tubes; and   a flow accelerating means that is provided inside the first tank so as to accelerate a flow speed of the flowing medium, which enters an inner space of the first tank through the inlet port, in the first tank in a longitudinal direction of the first tank.   
   
   
       2 . The heat exchanger according to  claim 1 , wherein
 the flow accelerating means has a first passage extending in the longitudinal direction and having a flow area narrower than a flow area of the inlet port.   
   
   
       3 . The heat exchanger according to  claim 2 , wherein
 the flow accelerating means has a first wall portion extending in the longitudinal direction.   
   
   
       4 . The heat exchanger according to  claim 3 , wherein
 the first wall portion is a first rib portion formed in the inner space of the first tank so that the first rib portion divides the inner space of the first tank into the first passage and a second passage so that the flowing medium can be accelerated to flow through the first passage and so that the flowing medium in the second passage is not accelerated to flow therethrough, and wherein   the flowing medium in the first passage and the flowing medium in the second passage are capable of being replaced therebetween through a clearance formed by the first rib portion.   
   
   
       5 . The heat exchanger according to  claim 2 , wherein
 the flow accelerating means is formed with the first tank as one unit made of plastic material.   
   
   
       6 . The heat exchanger according to  claim 2 , wherein
 the first tank is an upstream side tank.   
   
   
       7 . The heat exchanger according to  claim 1 , wherein
 the flow accelerating means has a first wall portion extending in the longitudinal direction and having a flow area narrower than a flow area of the inlet port.   
   
   
       8 . The heat exchanger according to  claim 7 , wherein
 the first wall portion is a first rib portion formed in the inner space of the first tank so that the first rib portion divides the inner space of the first tank into the first passage and a second passage so that the flowing medium can be accelerated to flow through the first passage and so that the flowing medium in the second passage is not accelerated to flow therethrough, and wherein   the flowing medium in the first passage and the flowing medium in the second passage are capable of being replaced therebetween through a clearance formed by the first rib portion.   
   
   
       9 . The heat exchanger according to  claim 7 , wherein
 the flow accelerating means is formed with the first tank as one unit made of plastic material.   
   
   
       10 . The heat exchanger according to  claim 7 , wherein
 the first tank is an upstream side tank.   
   
   
       11 . The heat exchanger according to  claim 1 , wherein
 the flow accelerating means has a second wall portion extending in a direction perpendicular to the longitudinal directions to form a second passage where the flowing medium in the second passage is not accelerated to flow therethrough and is capable of being replaced with the flowing medium in the first passage.   
   
   
       12  The heat exchanger according to  claim 11 , wherein
 the second wall portion is a second rib portion for forming the second passage and for obstructing the flowing medium entering through the inlet port from being accelerated to flow in the second passage.   
   
   
       13 . The heat exchanger according to  claim 9 , wherein
 at least one of the first wall portion and the second wall portion is formed in such a way that a wall portion of the first tank is partially dented toward the inner space to form the first passage and a second passage where the flowing medium in the second passage is not accelerated to flow therethrough and is capable of being replaced with the flowing medium in the first passage.   
   
   
       14 . The heat exchanger according to  claim 9 , wherein
 the flow accelerating means is formed with the first tank as one unit made of plastic material.   
   
   
       15 . The heat exchanger according to  claim 9 , wherein
 the first tank is an upstream side tank.   
   
   
       16 . The heat exchanger according to  claim 1 , wherein
 the flow accelerating means is formed with the first tank as one unit made of plastic material.   
   
   
       17 . The heat exchanger according to  claim 16 , wherein
 the first tank is an upstream side tank.   
   
   
       18 . The heat exchanger according to  claim 16 , wherein
 the first tank is an upstream side tank.