Microchannel heat exchanger with improvement of dirt-resisting and anti-blocking

Abstract

A microchannel heat exchanger ( 100 ) with improvement of dirt-resisting and anti-blocking is disclosed. The microchannel heat exchanger ( 100 ) includes at least two heat exchanger units ( 101, 102 ) vertically arranged in parallel with the top one being a first heat exchanger unit ( 101 ) and the bottom one being a second heat exchanger unit ( 102 ). Every heat exchanger unit ( 101, 102 ) includes: a first heat tube ( 103 ) and a second heat tube ( 104 ) oppositely arranged in the horizontal direction; and multiple flat tubes ( 105 ) extending between the first and second heat tubes ( 103, 104 ) and having both ends communicated with the first and second heat tubes ( 103, 104 ). The microchannel heat exchanger ( 100 ) also includes multiple fins ( 109 ) each arranged between and in contact with the neighboring flat tubes ( 105 ) of the same heat exchanger unit and extending from the first heat exchanger unit ( 101 ) to the second heat exchanger unit ( 102 ). The microchannel heat exchanger ( 100 ) overcomes the disadvantage of becoming dirty and blocking and has excellent heat dissipation effect.

1 . A microchannel heat exchanger with improvement of dirt-resisting and anti-blocking, comprising at least two heat exchanger units arranged in parallel with each other in a vertical direction, wherein the top one is a first heat exchanger unit, and the bottom one is a second heat exchanger unit;
 wherein each heat exchanger unit comprises a first head tube and a second head tube arranged oppositely in a horizontal direction, and a plurality of flat tubes extending between the first head tube and the second head tube with two ends of each flat tube being respectively communicated with the first head tube and the second head tube; and   wherein the microchannel heat exchanger further comprises a plurality of fins located between and contacting with adjacent flat tubes of each of the heat exchanger units and extending from the first heat exchanger unit to the second heat exchanger unit.   
     
     
         2 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 1 , further comprising an inlet tube communicated with the first heat exchanger unit, an outlet tube communicated with the second heat exchanger unit and an intermediate tube configured to communicate adjacent heat exchanger units. 
     
     
         3 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 2 , wherein the inlet tube is communicated with the first head tube of the first heat exchanger unit. 
     
     
         4 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 3 , wherein when there are more than two heat exchanger units, one of the first head tube and the second head tube of the heat exchanger unit between the first heat exchanger unit and the second heat exchanger unit is communicated with one of adjacent heat exchanger units through the intermediate tube, and the other one of the first head tube and the second head tube of the same heat exchanger unit is communicated with the other one of the adjacent heat exchanger units. 
     
     
         5 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 4 , wherein there are one or more inlet tubes, in case of one inlet tube, the inlet tube is connected to a middle portion of the first head tube of the first heat exchanger unit; or in case of more than one inlet tubes, the inlet tubes are evenly connected to the first head tube of the first heat exchanger unit; and
 wherein there are one or more intermediate tubes, in case of one intermediate tube, the intermediate tube is connected to a middle portion of the one of the first head tube and the second head tube; or in case of more than one intermediate tubes, the intermediate tubes are evenly connected to the one of the first head tube and the second head tube.   
     
     
         6 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 4 , wherein the second head tube of the heat exchanger unit odd-numbered from the top down is communicated with the second head tube of the heat exchanger unit immediately below the odd-numbered heat exchanger unit through the intermediate tube. 
     
     
         7 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 6 , wherein when the number of the heat exchanger units is even, one or more outlet tubes are provided on the first head tube of the second heat exchanger unit,
 in case of one outlet tube, the outlet tube is arranged at a middle portion of the first head tube of the second heat exchanger unit; or   in case of more than one outlet tubes, the outlet tubes are evenly connected to the first head tube of the second heat exchanger unit.   
     
     
         8 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 6 , wherein when the number of the heat exchanger units is odd, one or more outlet tubes are provided on the second head tube of the second heat exchanger unit,
 in case of one outlet tube, the outlet tube is provided at a middle portion of the second head tube of the second heat exchanger unit; or   in case of more than one outlet tubes, the outlet tubes are evenly connected to the second head tube of the second heat exchanger unit.   
     
     
         9 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 1 , further comprising a plurality of supporters for fixing adjacent heat exchanger units, two ends of some of the supporters are respectively connected to the first head tubes of the adjacent heat exchanger units, and two ends of the other of the supporters are respectively connected to the second head tubes of the adjacent heat exchanger units. 
     
     
         10 . The microchannel heat exchanger with improvement of dirt-resisting and anti-blocking according to  claim 9 , wherein the supporter is provided thereon with a fixing lug.