IP Library › Granted Patent US 12693076

Granted Patent B2

US 12693076 · App. 18/057,812 · Granted Jul 28, 2026

Heat exchanger and air conditioning system having the same

Inventors: Yanxing Li (Nordborg, DK); Leilei Wang (Haiyan, CN); Jing Yang (Nordborg, DK)

Assignee: DANFOSS A/S

F28D1/05366 F28F1/10 F28F9/001 F28F2009/004

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Quick Facts

Patent No.: US 12693076
App. No.: 18/057,812
Granted: Jul 28, 2026
Kind: B2

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Abstract

The present disclosure discloses a heat exchanger and an air conditioning system having the heat exchanger. The heat exchanger includes a first heat exchanger core, a second heat exchanger core and a connection part. Heat exchange tubes of the first heat exchanger core and the second heat exchanger core include first circuit heat exchange tubes. A length of the heat exchange tube of the first heat exchanger core is greater than a length of the heat exchange tube of the second heat exchanger core. The connection part includes a first connection part through which the first circuit heat exchange tubes of the first heat exchanger core are connected with the first circuit heat exchange tubes of the second heat exchanger core. The heat exchange tubes of at least one of the first heat exchanger core and the second heat exchanger core further include second circuit heat exchange tubes. First circuit heat exchange tube groups each constituted by at least one of the first circuit heat exchange tubes and second circuit heat exchange tube groups each constituted by at least one of the second circuit heat exchange tubes are arranged alternately. Thereby, the heat exchange performance can be improved at both partial load and full load.

Claims (51)

1 . An air conditioning system, comprising:

a heat exchanger, comprising:

a first heat exchanger core comprising a plurality of heat exchange tubes, the plurality of heat exchange tubes of the first heat exchanger core comprising a plurality of first circuit heat exchange tubes for forming a first part of a first circuit;

a second heat exchanger core located on a side of the first heat exchanger core in a thickness direction of the first heat exchanger core and comprising a plurality of heat exchange tubes, the plurality of heat exchange tubes of the second heat exchanger core comprising a plurality of first circuit heat exchange tubes for forming a second part of the first circuit, a length of the heat exchange tube of the first heat exchanger core being greater than a length of the heat exchange tube of the second heat exchanger core; and

a connection part comprising a first connection part through which the plurality of first circuit heat exchange tubes of the first heat exchanger core are connected with the plurality of first circuit heat exchange tubes of the second heat exchanger core;

wherein the plurality of heat exchange tubes of at least one of the first heat exchanger core and the second heat exchanger core further comprise a plurality of second circuit heat exchange tubes for forming a first part of a second circuit, and in the at least one of the first heat exchanger core and the second heat exchanger core, first circuit heat exchange tube groups each constituted by at least one of the plurality of first circuit heat exchange tubes and second circuit heat exchange tube groups each constituted by at least one of the plurality of second circuit heat exchange tubes are arranged alternately;

wherein the heat exchange tube of the first heat exchanger core has a length of L1, the heat exchange tube of the second heat exchanger core has a length of L2, and ⅕<L2/L1< 9/10; and

wherein the first heat exchanger core and the second heat exchanger core are arranged such that wind blows through the heat exchanger along a direction from the first heat exchanger core to the second heat exchanger core.

2 . The air conditioning system according to claim 1 , wherein:

the first heat exchanger core further comprises a plurality of fins arranged alternately with the plurality of heat exchange tubes of the first heat exchanger core; and

the second heat exchanger core further comprises a plurality of fins arranged alternately with the plurality of heat exchange tubes of the second heat exchanger core.

3 . The air conditioning system according to claim 1 , wherein:

the first connection part comprises a plurality of first connection tubes, and the plurality of first circuit heat exchange tubes of the first heat exchanger core are connected with the plurality of first circuit heat exchange tubes of the second heat exchanger core through the plurality of first connection tubes, respectively.

4 . The air conditioning system according to claim 1 , wherein:

a cross-sectional area of a flow channel of the first circuit heat exchange tube is different from that of a flow channel of the second circuit heat exchange tube; or

the first circuit heat exchange tube is a flat tube, the second circuit heat exchange tube is a flat tube, and a width of the first circuit heat exchange tube is different from that of the second circuit heat exchange tube; or

the first circuit heat exchange tube is a flat tube, the second circuit heat exchange tube is a flat tube, and a thickness of the first circuit heat exchange tube is different from that of the second circuit heat exchange tube.

5 . The air conditioning system according to claim 1 , wherein the first heat exchanger core and the second heat exchanger core are configured to flow a refrigerant from the second heat exchanger core to the first heat exchanger core.

6 . The air conditioning system according to claim 1 , wherein:

the plurality of heat exchange tubes of only the second heat exchanger core comprise the plurality of second circuit heat exchange tubes for forming the first part of the second circuit.

7 . The air conditioning system according to claim 6 , further comprising:

a pair of second circuit manifolds, of which one is connected with the plurality of second circuit heat exchange tubes of the second heat exchanger core at a side of the second heat exchanger core near the connection part, and of which the other is connected with the plurality of second circuit heat exchange tubes of the second heat exchanger core at a side of the second heat exchanger core away from the connection part.

8 . The air conditioning system according to claim 1 , wherein:

the plurality of heat exchange tubes of only the first heat exchanger core comprise the plurality of second circuit heat exchange tubes for forming the first part of the second circuit.

9 . The air conditioning system according to claim 8 , further comprising:

a pair of second circuit manifolds, of which one is connected with the plurality of second circuit heat exchange tubes of the first heat exchanger core at a side of the first heat exchanger core away from the connection part, and of which the other is connected with the plurality of second circuit heat exchange tubes of the first heat exchanger core at a side of the first heat exchanger core near the connection part.

10 . The air conditioning system according to claim 1 , further comprising:

a pair of first circuit manifolds, of which one is connected with the plurality of first circuit heat exchange tubes of the first heat exchanger core at a side of the first heat exchanger core away from the connection part, and of which the other is connected with the plurality of first circuit heat exchange tubes of the second heat exchanger core at a side of the second heat exchanger core away from the connection part.

11 . The air conditioning system according to claim 10 , wherein:

the first heat exchanger core further comprises a plurality of fins arranged alternately with the plurality of heat exchange tubes of the first heat exchanger core;

the second heat exchanger core further comprises a plurality of fins arranged alternately with the plurality of heat exchange tubes of the second heat exchanger core;

the first heat exchanger core comprises a first portion and a second portion, an orthographic projection of the first portion on a plane where the first heat exchanger core is located is at least partially overlapped with an orthographic projection of the second heat exchanger core on the plane where the first heat exchanger core is located, and an orthographic projection of the second portion on the plane where the first heat exchanger core is located is located outside the orthographic projection of the second heat exchanger core on the plane where the first heat exchanger core is located; and

at a same inlet wind speed, a wind resistance or pressure drop caused by at least a portion of at least one of the fins in the second portion is greater than a wind resistance or pressure drop caused by at least a portion of at least one of the fins in at least one of the second heat exchanger core and the first portion.

12 . The air conditioning system according to claim 1 , wherein:

the plurality of heat exchange tubes of the first heat exchanger core comprise the plurality of second circuit heat exchange tubes for forming the first part of the second circuit;

the plurality of heat exchange tubes of the second heat exchanger core comprise a plurality of second circuit heat exchange tubes for forming a second part of the second circuit.

13 . The air conditioning system according to claim 12 , further comprising:

a pair of second circuit manifolds, of which one is connected with the plurality of second circuit heat exchange tubes of the first heat exchanger core at a side of the first heat exchanger core away from the connection part, and of which the other is connected with the plurality of second circuit heat exchange tubes of the second heat exchanger core at a side of the second heat exchanger core away from the connection part.

14 . The air conditioning system according to claim 13 , wherein:

the connection part further comprises a second connection part, and the plurality of second circuit heat exchange tubes of the first heat exchanger core are connected with the plurality of second circuit heat exchange tubes of the second heat exchanger core through the second connection part.

15 . The air conditioning system according to claim 13 , further comprising:

another pair of second circuit manifolds, of which one is connected with the plurality of second circuit heat exchange tubes of the first heat exchanger core at a side of the first heat exchanger core near the connection part, and of which the other is connected with the plurality of second circuit heat exchange tubes of the second heat exchanger core at a side of the second heat exchanger core near the connection part.

16 . The air conditioning system according to claim 13 , further comprising:

a pair of first circuit manifolds, of which one is connected with the plurality of first circuit heat exchange tubes of the first heat exchanger core at the side of the first heat exchanger core away from the connection part, and of which the other is connected with the plurality of first circuit heat exchange tubes of the second heat exchanger core at the side of the second heat exchanger core away from the connection part, wherein one of the pair of first circuit manifolds is located at a refrigerant outlet side of the heat exchanger, and one of the pair of second circuit manifolds is located at the refrigerant outlet side of the heat exchanger; and

an outlet side manifold, which is in fluid communication with at least one of the first circuit manifold at the refrigerant outlet side of the heat exchanger and the second circuit manifold at the refrigerant outlet side of the heat exchanger through a connection tube.

17 . The air conditioning system according to claim 13 , further comprising:

wherein the one of the pair of first circuit manifolds is provided at a side of the one of the pair of second circuit manifolds away from the second heat exchanger core, or the one of the pair of first circuit manifolds is provided at a side of the one of the pair of second circuit manifolds towards the second heat exchanger core.

18 . The air conditioning system according to claim 13 , further comprising:

wherein a cross-sectional area of one of the pair of first circuit manifolds is different from that of one of the pair of second circuit manifolds, or an outer diameter of the one of the pair of first circuit manifolds is different from that of the one of the pair of second circuit manifolds.