HEAT EXCHANGER AND AIR CONDITIONING SYSTEM HAVING SAME
A heat exchanger having: a first heat exchanger core including a first sub-heat exchanger core and a second sub-heat exchanger core, wherein the first sub-heat exchanger core and the second sub-heat exchanger core includes heat exchange tubes, the heat exchange tubes of the first sub-heat exchanger core and the second sub-heat exchanger core are connected to each other, and orthographic projections of the first sub-heat exchanger core and the second sub-heat exchanger core on a plane where the second sub-heat exchanger core is located at least overlap partially; and a second heat exchanger core including a heat exchange tube, wherein the heat exchange tube of the second heat exchanger core is connected to the heat exchange tubes of the first sub-heat exchanger core and the second sub-heat exchanger core is disclosed. At the same incoming wind speed, the ratio of the wind resistance of the heat exchanger to the air passing through the first heat exchanger core to the wind resistance of the heat exchanger to the air passing through the second heat exchanger core is less than a predetermined value. By using the heat exchanger according to the present invention, the performance of the heat exchanger can be improved.
This application is a National Stage application of International Patent Application No. PCT/CN2021/123738, filed on Oct. 14, 2021, which claims priority to Chinese Patent Applications No. 202011213295.2, filed on Nov. 3, 2020, and No. 202022511650.6, filed on Nov. 3, 2020, each of which is hereby incorporated by reference in its entirety.
TECHNICAL FIELDThe embodiments of the present invention relate to a heat exchanger and an air-conditioning system having same.
BACKGROUNDA heat exchanger comprises a header and heat exchange tubes. The heat exchanger may comprise multiple rows of heat exchanger cores.
SUMMARYAn objective of embodiments of the present invention is to provide a heat exchanger and an air-conditioning system having same, which, for example, enable an improvement in heat exchanger performance.
Embodiments of the present invention provide a heat exchanger, comprising: a first heat exchanger core, the first heat exchanger core comprising a first secondary heat exchanger core and a second secondary heat exchanger core, each of the first secondary heat exchanger core and second secondary heat exchanger core comprising a heat exchange tube, the heat exchange tubes of the first secondary heat exchanger core and second secondary heat exchanger core being connected to each other, and orthographic projections of the first secondary heat exchanger core and second secondary heat exchanger core on a plane in which the second secondary heat exchanger core lies being at least partially overlapping; and a second heat exchanger core, the second heat exchanger core comprising a heat exchange tube, the heat exchange tube of the second heat exchanger core being connected to the heat exchange tube of the second secondary heat exchanger core of the first heat exchanger core, wherein, at the same incoming wind speed, the ratio of the wind resistance presented by the heat exchanger to air passing through the first heat exchanger core to the wind resistance presented by the heat exchanger to air passing through the second heat exchanger core is less than a predetermined value.
According to embodiments of the present invention, each of the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core further comprises a fin; the second heat exchanger core further comprises a fin; and at the same incoming wind speed, the wind resistance or pressure drop caused by at least a portion of at least one fin of the second heat exchanger core is greater than the wind resistance or pressure drop caused by at least a portion of at least one fin of the first heat exchanger core.
According to embodiments of the present invention, a cross-sectional area of at least one heat exchange tube of the second heat exchanger core is greater than a cross-sectional area of at least one heat exchange tube of the first heat exchanger core.
According to embodiments of the present invention, the heat exchanger further comprises: a first wind barrier plate, the first wind barrier plate being located at one side of the second heat exchanger core in the thickness direction of the second heat exchanger core; and orthographic projections of the first wind barrier plate and the second heat exchanger core on a plane in which the second heat exchanger core lies are at least partially overlapping.
According to embodiments of the present invention, the heat exchanger further comprises: a connecting part, the heat exchange tubes of the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core being connected via the connecting part, the first wind barrier plate being located at the side of the first secondary heat exchanger core of the first heat exchanger core that is remote from the connecting part in the length direction of the heat exchange tube of the first secondary heat exchanger core of the first heat exchanger core.
According to embodiments of the present invention, the first wind barrier plate and the first secondary heat exchanger core of the first heat exchanger core are located at the same side of the second secondary heat exchanger core of the first heat exchanger core in the thickness direction of the second secondary heat exchanger core of the first heat exchanger core.
According to embodiments of the present invention, the heat exchanger further comprises: a second wind barrier plate, wherein orthographic projections of the second wind barrier plate and the first heat exchanger core on a plane in which the second secondary heat exchanger core of the first heat exchanger core lies are at least partially overlapping. According to embodiments of the present invention, in the thickness direction of the second secondary heat exchanger core of the first heat exchanger core, the first wind barrier plate and the second wind barrier plate are located at the opposite side of the second secondary heat exchanger core of the first heat exchanger core from the first secondary heat exchanger core; and at the same incoming wind speed, the wind resistance of the second wind barrier plate is less than or equal to the wind resistance of the first wind barrier plate.
According to embodiments of the present invention, the heat exchanger further comprises: a third wind barrier plate, the third wind barrier plate being located between the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core in the thickness direction of the second secondary heat exchanger core of the first heat exchanger core.
According to embodiments of the present invention, the heat exchanger further comprises: a connecting part, the heat exchange tubes of the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core being connected via the connecting part; a first header, the first header being connected to the heat exchange tube of the second heat exchanger core at the side of the second heat exchanger core that is remote from the second secondary heat exchanger core of the first heat exchanger core; and a second header, the second header being connected to the heat exchange tube of the first secondary heat exchanger core of the first heat exchanger core at the side of the first secondary heat exchanger core of the first heat exchanger core that is remote from the connecting part.
According to embodiments of the present invention, a cross-sectional area of the first header is greater than a cross-sectional area of the second header.
According to embodiments of the present invention, the connecting part comprises multiple connecting tubes, and heat exchange tubes of the first secondary heat exchanger core of the first heat exchanger core are respectively connected to heat exchange tubes of the second secondary heat exchanger core of the first heat exchanger core via the multiple connecting tubes.
According to embodiments of the present invention, at least one of density, fin width, fin window angle, number of windows and window length of at least a portion of at least one fin of the second heat exchanger core is greater than at least one of density, fin width, fin window angle, number of windows and window length of at least a portion of at least one fin of the first heat exchanger core.
Embodiments of the present invention further provide an air-conditioning system, comprising the heat exchanger described above.
According to embodiments of the present invention, the heat exchanger further comprises: a connecting part, the heat exchange tubes of the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core being connected via the connecting part; a first header, the first header being connected to the heat exchange tube of the second heat exchanger core at the side of the second heat exchanger core that is remote from the second secondary heat exchanger core of the first heat exchanger core; and a second header, the second header being connected to the heat exchange tube of the first secondary heat exchanger core of the first heat exchanger core at the side of the first secondary heat exchanger core of the first heat exchanger core that is remote from the connecting part.
According to embodiments of the present invention, the first header and the second header are disposed horizontally in use.
According to embodiments of the present invention, the heat exchanger further comprises: a first header, the first header being connected to the heat exchange tube of the second heat exchanger core at the side of the second heat exchanger core that is remote from the second secondary heat exchanger core of the first heat exchanger core, wherein the first header is disposed horizontally in use, and the first header is below the second heat exchanger core in use.
According to embodiments of the present invention, in use, the first header is below the second heat exchanger core, and the second header is below the second secondary heat exchanger core of the first heat exchanger core.
According to embodiments of the present invention, in use, the first header is above the second heat exchanger core, and the second header is above the second secondary heat exchanger core of the first heat exchanger core.
According to embodiments of the present invention, in use, the second heat exchanger core and the second secondary heat exchanger core of the first heat exchanger core are located upstream of the first secondary heat exchanger core of the first heat exchanger core in the direction of flow of air through the heat exchanger.
According to embodiments of the present invention, in use, the second heat exchanger core and the second secondary heat exchanger core of the first heat exchanger core are located downstream of the first secondary heat exchanger core of the first heat exchanger core in the direction of flow of air through the heat exchanger.
By using the heat exchanger and the air-conditioning system having same according to embodiments of the present invention, for example, heat exchanger performance can be improved.
The present invention is explained further below in conjunction with the accompanying drawings and specific embodiments.
An air-conditioning system according to embodiments of the present invention comprises a compressor, and heat exchangers serving as an evaporator and a condenser.
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In some embodiments of the present invention, the fin of the second heat exchanger core 2 may be the same as the fin of the second secondary heat exchanger core 12 of the first heat exchanger core 1; at the same incoming wind speed, the wind resistance or pressure drop caused by at least a portion of at least one fin 9 of the second heat exchanger core 2 is greater than the wind resistance or pressure drop caused by at least a portion of at least one fin 9 of the first secondary heat exchanger core 11 of the first heat exchanger core 1. In some examples of the present invention, a flat tube of the second heat exchanger core 2 may be the same as a flat tube of the second secondary heat exchanger core 12 of the first heat exchanger core 1, and a cross-sectional area of at least one heat exchange tube 8 of the second heat exchanger core 2 is greater than a cross-sectional area of at least one heat exchange tube 8 of the first secondary heat exchanger core 11 of the first heat exchanger core 1. By configuring the fin and/or heat exchange tube of the second heat exchanger core 2 to be the same as the fin and/or heat exchange tube of the second secondary heat exchanger core 12 of the first heat exchanger core 1, the manufacturing difficulty can be reduced.
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According to an example of the present invention, the first wind barrier plate 31 and the first secondary heat exchanger core 11 of the first heat exchanger core 1 are located at the same side of the second secondary heat exchanger core 12 of the first heat exchanger core 1 in the thickness direction of the second secondary heat exchanger core 12 of the first heat exchanger core 1.
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Although the headers have been described with reference to the drawings, the headers may have any suitable shape and structure; there is no limitation to the headers shown in
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In embodiments of the present invention, the wind barrier plate may also be impermeable to wind. The wind barrier plate may have a filtering effect. The wind barrier plate may be a filter mesh, a grille or a perforated plate, etc. There are no restrictions on the wind barrier plate material, which may be metal, plastic, nylon, etc.
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The first row of heat exchanger cores 101 is located upstream of the second row of heat exchanger cores 102 in the direction of flow of air A through the heat exchanger 100 in use; for example, when the heat exchanger is being used as an evaporator, refrigerant enters the heat exchanger 100 through a connecting tube 72 connected to the second header 62, and refrigerant can flow out of the heat exchanger 100 through a connecting tube connected to the first header 61. Air and refrigerant exchange heat in counterflow, and the amount of heat exchanged can thus be increased. Furthermore, a large amount of material is saved with only a small reduction in the amount of heat exchanged (only removing the material of the second row of heat exchanger cores 102). Compared with a single-row heat exchanger, this design can save space (in the length direction of the heat exchange tubes).
The first row of heat exchanger cores 101 is located downstream of the second row of heat exchanger cores 102 in the direction of flow of air A through the heat exchanger 100 in use. For example, when the heat exchanger is being used as an evaporator (the air temperature being higher than the refrigerant temperature, the second row of heat exchanger cores 102 being the first row in the wind flow direction, and the first row of heat exchanger cores 101 being the second row), refrigerant enters the heat exchanger 100 through the connecting tube 72 connected to the second header 62, and refrigerant can flow out of the heat exchanger 100 through the connecting tube connected to the first header 61. Air and refrigerant exchange heat in parallel flow; when the refrigerant reaches the extremities (close to the first header 61) of the heat exchange tubes 8 of the first row of heat exchanger cores 101, the refrigerant must attain an overheated state and increase in temperature. If the two rows of the heat exchanger were of the same length, then air would need to pass through the first row, and after passing through the first row would be reduced in temperature and begin to pass through the second row, but the temperature of the refrigerant in the second row is rising, so the temperature difference between the air and refrigerant will be very small or even non-existent, which is not conducive to heat exchange, and overheating of the refrigerant is unlikely to occur. This can be avoided by the design in question.
The first header 61 is below the first row of heat exchanger cores 101 in use. For example, when the heat exchanger is being used as a condenser, refrigerant undergoes a phase transition from a gaseous state to a liquid state in the flow direction, and its density increases greatly. If the first header 61 is in a lower region, then in the process of phase transition of refrigerant, liquid refrigerant can flow to the lower region automatically under the action of gravity, so the pressure drop of refrigerant along its course can be reduced, thereby increasing the amount of heat exchanged in the heat exchanger.
The first header 61 is above the first row of heat exchanger cores 101 in use. For example, when the heat exchanger is being used as an evaporator, refrigerant undergoes a phase transition from a dual-phase gaseous/liquid state to a purely gaseous state in the flow direction, and its density decreases greatly. If the first header 61 is in an upper region, then in the process of phase transition of refrigerant, gaseous refrigerant can rise to the upper region automatically under the action of buoyancy, so the pressure drop of refrigerant along its course can be reduced, thereby increasing the amount of heat exchanged in the heat exchanger.
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By using the heat exchanger 100 according to embodiments of the present invention, the performance of the heat exchanger 100 can be improved.
Although the above embodiments have been described, certain features in the above embodiments can be combined to form new embodiments.
Claims
1. A heat exchanger, comprising:
- a first heat exchanger core, the first heat exchanger core comprising a first secondary heat exchanger core and a second secondary heat exchanger core, each of the first secondary heat exchanger core and second secondary heat exchanger core comprising a heat exchange tube, the heat exchange tubes of the first secondary heat exchanger core and second secondary heat exchanger core being connected to each other, and orthographic projections of the first secondary heat exchanger core and second secondary heat exchanger core on a plane in which the second secondary heat exchanger core lies being at least partially overlapping; and
- a second heat exchanger core, the second heat exchanger core comprising a heat exchange tube, the heat exchange tube of the second heat exchanger core being connected to the heat exchange tube of the second secondary heat exchanger core of the first heat exchanger core,
- wherein, at the same incoming wind speed, the ratio of the wind resistance presented by the heat exchanger to air passing through the first heat exchanger core to the wind resistance presented by the heat exchanger to air passing through the second heat exchanger core is less than a predetermined value.
2. The heat exchanger as claimed in claim 1, wherein:
- each of the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core further comprises a fin;
- the second heat exchanger core further comprises a fin; and
- at the same incoming wind speed, the wind resistance or pressure drop caused by at least a portion of at least one fin of the second heat exchanger core is greater than the wind resistance or pressure drop caused by at least a portion of at least one fin of the first heat exchanger core.
3. The heat exchanger as claimed in claim 1, wherein:
- a cross-sectional area of at least one heat exchange tube of the second heat exchanger core is greater than a cross-sectional area of at least one heat exchange tube of the first heat exchanger core.
4. The heat exchanger as claimed in claim 1, further comprising:
- a first wind barrier plate, the first wind barrier plate being located at one side of the second heat exchanger core in the thickness direction of the second heat exchanger core; and orthographic projections of the first wind barrier plate and the second heat exchanger core on a plane in which the second heat exchanger core lies are at least partially overlapping.
5. The heat exchanger as claimed in claim 4, further comprising:
- a connecting part, the heat exchange tubes of the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core being connected via the connecting part,
- the first wind barrier plate being located at the side of the first secondary heat exchanger core of the first heat exchanger core that is remote from the connecting part in the length direction of the heat exchange tube of the first secondary heat exchanger core of the first heat exchanger core.
6. The heat exchanger as claimed in claim 5, wherein:
- the first wind barrier plate and the first secondary heat exchanger core of the first heat exchanger core are located at the same side of the second secondary heat exchanger core of the first heat exchanger core in the thickness direction of the second secondary heat exchanger core of the first heat exchanger core.
7. The heat exchanger as claimed in claim 4, further comprising:
- a second wind barrier plate, wherein orthographic projections of the second wind barrier plate and the first heat exchanger core on a plane in which the second secondary heat exchanger core of the first heat exchanger core lies are at least partially overlapping.
8. The heat exchanger as claimed in claim 7, wherein:
- in the thickness direction of the second secondary heat exchanger core of the first heat exchanger core, the first wind barrier plate and the second wind barrier plate are located at the opposite side of the second secondary heat exchanger core of the first heat exchanger core from the first secondary heat exchanger core; and at the same incoming wind speed, the wind resistance of the second wind barrier plate is less than or equal to the wind resistance of the first wind barrier plate.
9. The heat exchanger as claimed in claim 1, further comprising:
- a third wind barrier plate, the third wind barrier plate being located between the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core in the thickness direction of the second secondary heat exchanger core of the first heat exchanger core.
10. The heat exchanger as claimed in claim 1, further comprising:
- a connecting part, the heat exchange tubes of the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core being connected via the connecting part;
- a first header, the first header being connected to the heat exchange tube of the second heat exchanger core at the side of the second heat exchanger core that is remote from the second secondary heat exchanger core of the first heat exchanger core; and
- a second header, the second header being connected to the heat exchange tube of the first secondary heat exchanger core of the first heat exchanger core at the side of the first secondary heat exchanger core of the first heat exchanger core that is remote from the connecting part.
11. (canceled)
12. The heat exchanger as claimed in claim 5, wherein:
- the connecting part comprises multiple connecting tubes, and heat exchange tubes of the first secondary heat exchanger core of the first heat exchanger core are respectively connected to heat exchange tubes of the second secondary heat exchanger core of the first heat exchanger core via the multiple connecting tubes.
13. The heat exchanger as claimed in claim 1, wherein:
- at least one of density, fin width, fin window angle, number of windows and window length of at least a portion of at least one fin of the second heat exchanger core is greater than at least one of density, fin width, fin window angle, number of windows and window length of at least a portion of at least one fin of the first heat exchanger core.
14. An air-conditioning system, comprising:
- the heat exchanger as claimed in claim 1.
15. The air-conditioning system as claimed in claim 14, wherein:
- the heat exchanger further comprises:
- a connecting part, the heat exchange tubes of the first secondary heat exchanger core and second secondary heat exchanger core of the first heat exchanger core being connected via the connecting part;
- a first header, the first header being connected to the heat exchange tube of the second heat exchanger core at the side of the second heat exchanger core that is remote from the second secondary heat exchanger core of the first heat exchanger core; and
- a second header, the second header being connected to the heat exchange tube of the first secondary heat exchanger core of the first heat exchanger core at the side of the first secondary heat exchanger core of the first heat exchanger core that is remote from the connecting part.
16. The air-conditioning system as claimed in claim 15, wherein:
- the first header and the second header are disposed horizontally in use.
17. The air-conditioning system as claimed in claim 14, wherein:
- the heat exchanger further comprises:
- a first header, the first header being connected to the heat exchange tube of the second heat exchanger core at the side of the second heat exchanger core that is remote from the second secondary heat exchanger core of the first heat exchanger core;
- wherein the first header is disposed horizontally in use, and the first header is below the second heat exchanger core in use.
18. The air-conditioning system as claimed in claim 15, wherein:
- in use, the first header is below the second heat exchanger core, and the second header is below the second secondary heat exchanger core of the first heat exchanger core.
19. The air-conditioning system as claimed in claim 15, wherein:
- in use, the first header is above the second heat exchanger core, and the second header is above the second secondary heat exchanger core of the first heat exchanger core.
20. The air-conditioning system as claimed in claim 14, wherein:
- in use, the second heat exchanger core and the second secondary heat exchanger core of the first heat exchanger core are located upstream of the first secondary heat exchanger core of the first heat exchanger core in the direction of flow of air through the heat exchanger.
21. The air-conditioning system as claimed in claim 14, wherein:
- in use, the second heat exchanger core and the second secondary heat exchanger core of the first heat exchanger core are located downstream of the first secondary heat exchanger core of the first heat exchanger core in the direction of flow of air through the heat exchanger.
Type: Application
Filed: Oct 14, 2021
Publication Date: Jan 4, 2024
Inventors: Feng ZHANG (Jiaxing), Yanxing LI (Jiaxing), Mustafa K. YANIK (York, PA)
Application Number: 18/251,489