CN117570747A - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
CN117570747A
CN117570747A CN202210952879.4A CN202210952879A CN117570747A CN 117570747 A CN117570747 A CN 117570747A CN 202210952879 A CN202210952879 A CN 202210952879A CN 117570747 A CN117570747 A CN 117570747A
Authority
CN
China
Prior art keywords
heat exchange
inlet header
exchange tube
inlet
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210952879.4A
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Chinese (zh)
Inventor
邵春宇
李艳星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Priority to CN202210952879.4A priority Critical patent/CN117570747A/en
Publication of CN117570747A publication Critical patent/CN117570747A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0475—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
    • F28D1/0476—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0243—Header boxes having a circular cross-section

Abstract

The invention discloses a heat exchanger. The heat exchanger includes: a plurality of heat exchange tubes; and an inlet header for the flow of heat exchange medium into the heat exchanger, the ends of the heat exchange tubes being connected to and in fluid communication with the inlet header, the inlet header having a height H, the inlet header having a width D, and H.ltoreq.D.ltoreq.5H, and wherein the bottoms of the inlet headers are flat at least between adjacent heat exchange tubes; or the bottom of the inlet collecting pipe comprises a curved surface part, and the minimum curvature radius of the curved surface part is more than or equal to 0.7D. According to the heat exchanger provided by the invention, the distribution of the refrigerant in the heat exchanger is improved, and the performance of the heat exchanger is improved.

Description

Heat exchanger
Technical Field
The present invention relates to a heat exchanger.
Background
The heat exchanger includes: the inlet collecting pipe and the outlet collecting pipe are connected with heat exchange pipes between the inlet collecting pipe and the outlet collecting pipe.
Disclosure of Invention
The object of the present invention is to provide a heat exchanger whereby, for example, the distribution of refrigerant in the heat exchanger can be improved.
An embodiment of the present invention provides a heat exchanger including: a plurality of heat exchange tubes; and an inlet header for the flow of heat exchange medium into the heat exchanger, the ends of the heat exchange tubes being connected to and in fluid communication with the inlet header, wherein the inlet header has a height H, the inlet header has a width D, and H.ltoreq.D.ltoreq.5H, and wherein the bottoms of the inlet headers are flat at least between adjacent heat exchange tubes; or the bottom of the inlet collecting pipe comprises a curved surface part, and the minimum curvature radius of the curved surface part is more than or equal to 0.7D.
According to an embodiment of the invention, the heat exchanger further comprises: distribution pipes disposed in the inlet header.
According to an embodiment of the present invention, the inlet header has a heat exchange tube insertion opening provided in the bottom, and the end portion of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the bottom of the inlet header; or the inlet header has a heat exchange tube insertion opening provided in the top, and the end of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the top of the inlet header.
According to an embodiment of the present invention, the heat exchange tube is a flat tube including a plurality of fluid passages arranged in a width direction of the flat tube, and an end face of an end portion of the heat exchange tube includes a first portion having an opening of at least one fluid passage, the first portion being spaced from a lowest portion of a bottom surface of an inner cavity of the inlet header by a distance h, and 0.ltoreq.h.ltoreq.5 mm.
According to an embodiment of the invention, the end face of the end portion of the heat exchange tube further comprises a second portion having at least one opening for a fluid passage, the second portion being higher than the first portion and being at a distance from the lowest point of the bottom surface of the inner cavity of the inlet header greater than a predetermined value, to allow, in use, the gaseous heat exchange medium in the inlet header to flow into the opening of the second portion.
According to an embodiment of the present invention, the first portion of the end face of the end portion of the heat exchange tube is located on one side in the width direction of the heat exchange tube, and the second portion of the end face of the end portion of the heat exchange tube is located on the other side in the width direction of the heat exchange tube.
According to an embodiment of the invention, the second portions of the end faces of the ends of the heat exchange tubes are located on both sides of the first portions in the width direction of the heat exchange tubes, or the first portions of the end faces of the ends of the heat exchange tubes are located on both sides of the second portions in the width direction of the heat exchange tubes.
According to an embodiment of the present invention, the end face of the end portion of the heat exchange tube extends obliquely from one edge to the other edge in the width direction of the heat exchange tube.
According to an embodiment of the present invention, the end face of the end portion of the heat exchange tube has a curved shape.
According to an embodiment of the present invention, the heat exchange tube includes two sub heat exchange tubes, an end face of an end portion of one of the two sub heat exchange tubes is spaced apart from a lowest portion of a bottom surface of an inner cavity of the inlet header by h, and 0.ltoreq.h.ltoreq.5 mm, and an end face of an end portion of the other of the two sub heat exchange tubes is higher than the end face of the end portion of the one sub heat exchange tube and is spaced apart from a lowest point of the bottom surface of the inner cavity of the inlet header by a distance greater than a predetermined value to allow a gaseous heat exchange medium in the inlet header to flow into the other sub heat exchange tube in use.
According to an embodiment of the present invention, the plurality of heat exchange tubes includes a first heat exchange tube group including at least one first heat exchange tube and a second heat exchange tube group including at least one second heat exchange tube, an end face of an end portion of the first heat exchange tube is spaced apart from a lowest portion of a bottom surface of an inner cavity of the inlet header by h, and 0.ltoreq.h.ltoreq.5 mm, and an end face of an end portion of the second heat exchange tube is higher than an end face of the end portion of the first heat exchange tube and spaced apart from a lowest point of the bottom surface of the inner cavity of the inlet header by a distance greater than a predetermined value to allow a gaseous heat exchange medium in the inlet header to flow into the second heat exchange tube in use.
According to an embodiment of the present invention, the first heat exchange tube group and the second heat exchange tube group are alternately arranged.
According to an embodiment of the present invention, the first heat exchange tube group and the second heat exchange tube group are alternately arranged in a direction from the inlet side of the inlet header to the other side of the inlet header opposite to the inlet side in the longitudinal direction of the inlet header.
According to an embodiment of the present invention, the first heat exchange tube group is disposed at one side in the longitudinal direction of the inlet header, and the second heat exchange tube group is disposed at the other side in the longitudinal direction of the inlet header.
According to an embodiment of the present invention, the first heat exchange tube group is disposed on the upstream side of the second heat exchange tube group in a direction from the inlet side of the inlet header to the other side of the inlet header opposite to the inlet side in the longitudinal direction of the inlet header.
According to an embodiment of the present invention, the distance between the end face of the end of the heat exchange tube and the lowest part of the bottom surface of the inner cavity of the inlet header pipe is h, and h is 0.ltoreq.5 mm, and the heat exchanger further includes: an outlet header; and an air duct, the other end of the heat exchange tube being connected to and in fluid communication with the outlet header, the inlet and outlet of the air duct being connected to and in fluid communication with the inlet header and the outlet header, respectively, the inlet of the air duct being higher than the end face of the end of the heat exchange tube and being spaced from the lowest point of the bottom surface of the inner cavity of the inlet header by a distance greater than a predetermined value to allow, in use, gaseous heat exchange medium in the inlet header to flow into the air duct.
According to an embodiment of the present invention, the plurality of heat exchange tubes are disposed on the upstream side of the air duct in a direction from the inlet side of the inlet header to the other side of the inlet header opposite to the inlet side in the longitudinal direction of the inlet header.
According to an embodiment of the invention, the inlet header comprises an end cap closing an end of the inlet header, the end cap of the inlet header having a through hole, the inlet of the gas duct being connected to and in fluid communication with the through hole of the end cap of the inlet header, the through hole of the end cap of the inlet header being higher than an end face of the end of the heat exchange tube and being at a distance from a lowest point of a bottom surface of an inner cavity of the inlet header of more than a predetermined value to allow, in use, a gaseous heat exchange medium in the inlet header to flow into the gas duct.
According to an embodiment of the invention, the outlet header comprises an end cap closing an end of the outlet header, the end cap of the outlet header having a through hole, the outlet of the air duct being connected to the through hole of the end cap of the outlet header.
According to an embodiment of the invention, the bottom of the inlet header is flat and configured to be horizontal in use.
According to an embodiment of the invention, the inlet header has the heat exchange tube insertion opening provided in the bottom, the end portion of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the bottom of the inlet header, and the heat exchanger further comprises a distribution tube provided in the inlet header and located above the first portion of the end face of the end portion of the heat exchange tube.
According to an embodiment of the invention, the inlet header has the heat exchange tube insertion opening provided in the top, the end portion of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the top of the inlet header, and the heat exchanger further comprises a distribution tube provided in the inlet header and below the second portion of the end face of the end portion of the heat exchange tube.
According to an embodiment of the present invention, the inlet header has the heat exchange tube insertion opening provided in a bottom portion, an end portion of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the bottom portion of the inlet header, and the heat exchanger further includes a distribution tube provided in the inlet header and located above an end face of an end portion of the one of the two sub heat exchange tubes; or the inlet header has the heat exchange tube insertion opening provided in the top, the end portion of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the top of the inlet header, and the heat exchanger further includes a distribution tube provided in the inlet header and located below an end face of the end portion of the other of the two sub heat exchange tubes.
According to an embodiment of the present invention, the two sub heat exchange tubes are arranged in a horizontal direction perpendicular to the longitudinal direction of the inlet header.
With the heat exchanger according to the embodiment of the invention, the distribution of the refrigerant in the heat exchanger can be improved.
Drawings
FIG. 1 is a schematic perspective view of a heat exchanger according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of an inlet header of a heat exchanger according to one embodiment of the invention;
fig. 3 is a cross-sectional view of an inlet header of a heat exchanger according to another embodiment of the present invention;
fig. 4 is a cross-sectional view of an inlet header of a heat exchanger according to still another embodiment of the present invention;
fig. 5 is a cross-sectional view of an inlet header of a heat exchanger according to still another embodiment of the present invention;
FIG. 6 is a schematic diagram of a heat exchanger according to one embodiment of the invention;
FIG. 7 is a schematic view of a heat exchanger according to another embodiment of the invention;
FIG. 8 is a schematic view of a heat exchanger according to yet another embodiment of the present invention;
FIG. 9 is a schematic view of a heat exchanger according to yet another embodiment of the invention;
FIG. 10 is a schematic view of a heat exchanger according to a further embodiment of the invention;
FIG. 11 is a schematic view of a heat exchanger according to a variation of an embodiment of the present invention;
FIG. 12 is a schematic front view of a heat exchanger according to one embodiment of the invention;
FIG. 13 is a schematic front view of a heat exchanger according to another embodiment of the present invention;
FIG. 14 is a schematic front view of a heat exchanger according to yet another embodiment of the present invention; and
fig. 15 is a schematic view of a heat exchanger according to a modification of the embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
Referring to fig. 1 to 15, a heat exchanger 100 according to an embodiment of the present invention includes: a plurality of heat exchange tubes 2; and an inlet header 3 for the flow of heat exchange medium into the heat exchanger 100, the ends 20 of the heat exchange tubes 2 being connected to and in fluid communication with the inlet header 3. The height of the inlet collecting pipe 3 is H, the width of the inlet collecting pipe 3 is D, and H is more than or equal to D and less than or equal to 5H. Referring to fig. 2 to 3, 6 to 15, the bottom 30 of the inlet header 3 is flat, at least between adjacent heat exchange tubes 2 or over the entire length of the inlet header 3; or as shown in fig. 4 to 5, the bottom 30 of the inlet header 3 includes a curved portion 301, and the minimum radius of curvature of the curved portion 301 is greater than or equal to 0.7D. For example, the bottom 30 of the inlet header 3 is flat and is configured to be horizontal in use. For example, the curved portion 301 is configured such that in use, between two horizontal planes, the distance between the two horizontal planes is less than or equal to 0.2D. The bottom 30 of the inlet header 3 may be curved. The heat exchanger 100 further includes: a distribution pipe 4 provided in the inlet header 3; and fins 7 (see fig. 1) alternately arranged with the heat exchange tubes 2. The distribution pipe 4 may have a plurality of openings penetrating the pipe wall of the distribution pipe 4, the plurality of openings being arranged at intervals along the longitudinal direction of the distribution pipe 4.
Referring to fig. 6 to 14, in some embodiments of the present invention, the inlet header 3 has a heat exchange tube insertion opening 302 provided in the bottom 30, and the end 20 of the heat exchange tube 2 is inserted into the inlet header 3 from the heat exchange tube insertion opening 302 in the bottom 30 of the inlet header 3. Referring to fig. 15, in still other embodiments of the present invention, the inlet header 3 has a heat exchange tube insertion opening 312 provided in the top 31, and the end 20 of the heat exchange tube 2 is inserted into the inlet header 3 from the heat exchange tube insertion opening 312 in the top 31 of the inlet header 3.
Referring to fig. 6 to 15, in some embodiments of the present invention, the heat exchange tube 2 is a flat tube including a plurality of fluid passages arranged in a width direction of the flat tube, and the end face 21 of the end 20 of the heat exchange tube 2 includes a first portion 211, the first portion 211 having an opening of at least one fluid passage, the first portion 211 being spaced from a lowermost portion of the bottom surface 330 of the inner cavity 33 of the inlet header 3 by h, and 0.ltoreq.h.ltoreq.5 mm. In the case shown in fig. 6 to 14, i.e. in the case where the end 20 of the heat exchange tube 2 is inserted into the inlet header 3 from the heat exchange tube insertion opening 302 in the bottom 30 of the inlet header 3, the distribution tube 4 is disposed in the inlet header 3 above the first portion 211 of the end face 21 of the end 20 of the heat exchange tube 2. Referring to fig. 7-10 and 15, the end face 21 of the end 20 of the heat exchange tube 2 may further comprise a second portion 212, said second portion 212 having at least one opening for a fluid passage, said second portion 212 being higher than said first portion 211 and being at a distance from the lowest point of the bottom surface 330 of the inner cavity 33 of the inlet header 3 of more than a predetermined value, to allow, in use, the gaseous heat exchange medium in the inlet header 3 to flow into the opening of said second portion 212. In the case shown in fig. 15, i.e. in the case where the end 20 of the heat exchange tube 2 is inserted into the inlet header 3 from the heat exchange tube insertion opening 312 in the top 31 of the inlet header 3, the distribution tube 4 is disposed in the inlet header 3 below the second portion 212 of the end face 21 of the end 20 of the heat exchange tube 2.
Referring to fig. 7, 9, 10 and 15, in some embodiments of the present invention, the first portion 211 of the end surface 21 of the end portion 20 of the heat exchange tube 2 is located at one side in the width direction of the heat exchange tube 2, and the second portion 212 of the end surface 21 of the end portion 20 of the heat exchange tube 2 is located at the other side in the width direction of the heat exchange tube 2. Referring to fig. 8, in other embodiments of the present invention, the second portions 212 of the end surfaces 21 of the end portions 20 of the heat exchange tubes 2 are located on both sides of the first portions 211 in the width direction of the heat exchange tubes 2, or the first portions 211 of the end surfaces 21 of the end portions 20 of the heat exchange tubes 2 are located on both sides of the second portions 212 in the width direction of the heat exchange tubes 2.
Referring to fig. 9, in some embodiments of the present invention, the end surface 21 of the end portion 20 of the heat exchange tube 2 extends obliquely from one edge 23 to the other edge 24 in the width direction of the heat exchange tube 2. Referring to fig. 10, in other embodiments of the present invention, the end surface 21 of the end portion 20 of the heat exchange tube 2 has a curved shape.
Referring to fig. 11, in some embodiments of the present invention, the heat exchange tube 2 includes two sub heat exchange tubes 2A and 2B, and the two sub heat exchange tubes 2A and 2B are arranged in a horizontal direction perpendicular to the longitudinal direction of the inlet header 3. The end face 21 of the end 20 of one of the two sub heat exchange tubes 2A and 2B is spaced from the lowest portion of the bottom surface 330 of the inner cavity 33 of the inlet header 3 by h and 0.ltoreq.h.ltoreq.5 mm, and the end face 21 Gao Yuzi of the end 20 of the other sub heat exchange tube 2B of the two sub heat exchange tubes 2A and 2B is spaced from the end face 21 of the end 20 of the inlet header 3 by a distance greater than a predetermined value to allow the gaseous heat exchange medium in the inlet header 3 to flow into the sub heat exchange tube 2B in use. Thus, the sub heat exchange tube 2A is for flowing through the liquid refrigerant, and the sub heat exchange tube 2B is for flowing through the gaseous refrigerant. In the case shown in fig. 6 to 14, that is, in the case where the end 20 of the heat exchange tube 2 is inserted into the inlet header 3 from the heat exchange tube insertion opening 302 in the bottom 30 of the inlet header 3, the distribution tube 4 is disposed in the inlet header 3 above the end face 21 of the end 20 of one of the two sub heat exchange tubes 2A and 2B 2A. In the case shown in fig. 15, that is, in the case where the end 20 of the heat exchange tube 2 is inserted into the inlet header 3 from the heat exchange tube insertion opening 312 in the top 31 of the inlet header 3, the distribution tube 4 is disposed in the inlet header 3 and below the end face 21 of the end 20 of the other sub heat exchange tube 2B of the two sub heat exchange tubes 2A and 2B.
Referring to fig. 12 and 13, in some embodiments of the present invention, the plurality of heat exchange tubes 2 includes a first heat exchange tube group including at least one first heat exchange tube 2-1 (e.g., two or more first heat exchange tubes 2-1) and a second heat exchange tube group including at least one second heat exchange tube 2-2 (e.g., one second heat exchange tube 2-2), the end face 21 of the end 20 of the first heat exchange tube 2-1 is at a distance h from the lowest portion of the bottom surface 330 of the inner cavity 33 of the inlet header 3 and 0.ltoreq.h.ltoreq.5 mm, and the end face 21 of the end 20 of the second heat exchange tube 2-2 is higher than the end face 21 of the end 20 of the first heat exchange tube 2-1 and is more than a predetermined value from the lowest point of the bottom surface 330 of the inner cavity 33 of the inlet header 3 to allow, in use, the gaseous heat exchange medium in the inlet header 3 to flow into the second heat exchange tube 2-2. As shown in fig. 12, the first heat exchange tube group and the second heat exchange tube group may be alternately arranged. For example, the first heat exchange tube groups and the second heat exchange tube groups are alternately arranged in the longitudinal direction of the inlet header 3 in a direction from the inlet side 31 of the inlet header 3 to the other side 32 of the inlet header 3 opposite to the inlet side 31. Or as shown in fig. 13, the first heat exchange tube group is provided on one side in the longitudinal direction of the inlet header 3, and the second heat exchange tube group is provided on the other side in the longitudinal direction of the inlet header 3. For example, the first heat exchange tube group is disposed on the upstream side of the second heat exchange tube group in the direction from the inlet side 31 of the inlet header 3 to the other side 32 of the inlet header 3 opposite to the inlet side 31 in the longitudinal direction of the inlet header 3. Thus, the first heat exchange tube 2-1 is used to flow through the liquid refrigerant, and the sub-second heat exchange tube 2-2 is used to flow through the gaseous refrigerant.
Referring to FIG. 14, in some embodiments of the present invention, the end face 21 of the end 20 of the heat exchange tube 2 is spaced from the lowest portion of the bottom surface 330 of the inner cavity 33 of the inlet header 3 by a distance h, and 0.ltoreq.h.ltoreq.5 mm, the heat exchanger 100 further includes: an outlet header 5; and an air duct 6, the other end 20 of the heat exchange tube 2 being connected to and in fluid communication with the outlet header 5, the inlet 61 and outlet 62 of the air duct 6 being connected to and in fluid communication with the inlet header 3 and the outlet header 5, respectively, the inlet 61 of the air duct 6 being higher than the end face 21 of the end 20 of the heat exchange tube 2 and being more than a predetermined value from the lowest point of the bottom surface 330 of the inner cavity 33 of the inlet header 3 to allow, in use, the gaseous heat exchange medium in the inlet header 3 to flow into the air duct 6. For example, the plurality of heat exchange tubes 2 are disposed on the upstream side of the air duct 6 in the direction from the inlet side 31 of the inlet header 3 to the other side 32 of the inlet header 3 opposite to the inlet side 31 in the longitudinal direction of the inlet header 3. The inlet header 3 comprises an end cap 35 closing the end 34 of the inlet header 3, the end cap 35 of the inlet header 3 having a through hole 350, the inlet 61 of the gas duct 6 being connected to and in fluid communication with the through hole 350 of the end cap 35 of the inlet header 3, the through hole 350 of the end cap 35 of the inlet header 3 being higher than the end face 21 of the end 20 of the heat exchange tube 2 and being at a distance from the lowest point of the bottom surface 330 of the inner cavity 33 of the inlet header 3 of more than a predetermined value for allowing, in use, gaseous heat exchange medium in the inlet header 3 to flow into the gas duct 6. The outlet header 5 comprises an end cap 55 closing the end 54 of the outlet header 5, the end cap 55 of the outlet header 5 having a through hole 550, the outlet 62 of the air duct 6 being connected to the through hole 550 of the end cap 55 of the outlet header 5. Thus, all heat exchange tubes are used for flowing through liquid refrigerant, while the gas-guide tube 6 is used for flowing through gaseous refrigerant.
According to the heat exchanger provided by the invention, the gas-liquid two-phase refrigerant in the inlet collecting pipe can be separated to a greater extent, so that the distribution of the refrigerant is improved, and the heat exchange efficiency of the heat exchanger is improved. In addition, by providing the side of the heat exchange pipe into which the more liquid refrigerant flows on the side where the heat exchange strength is larger (normally, the windward side), the heat exchange efficiency of the heat exchanger is further improved.
According to the heat exchanger of the present invention, two-phase refrigerant flows into the inlet header through the distribution pipe. Meanwhile, the end face of the heat exchange tube is designed to be in a non-planar form, so that two-phase refrigerant at the inlet of the heat exchange tube enters different channels of the heat exchange tube after being separated by gravity, and the heat exchange efficiency is improved.
According to the heat exchanger of the invention, the height of the inlet collecting pipe 3 is H, the width of the inlet collecting pipe 3 is D, and H is less than or equal to D and less than or equal to 5H. The bottom 30 of the inlet header 3 is flat and configured to be horizontal in use, at least between adjacent heat exchange tubes 2 or over the entire length of the inlet header 3; or the bottom 30 of said inlet header 3 comprises a curved portion 301, the minimum radius of curvature of the curved portion 301 being greater than or equal to 0.7D, the curved portion 301 being configured, in use, to be between two horizontal planes, the distance between said two horizontal planes being less than or equal to 0.2D. Therefore, the liquid refrigerant can be flatly paved at the bottom of the inlet collecting pipe, and more liquid refrigerant can enter the channels of the heat exchange pipe under the condition that the end part of the heat exchange pipe is close to the bottom of the inlet collecting pipe.
According to the heat exchanger of the present invention, the first portion 211 is spaced from the lowest portion of the bottom surface 330 of the inner cavity 33 of the inlet header 3 by a distance h, and 0.ltoreq.h.ltoreq.5 mm. The second portion 212 is higher than the first portion 211 and is more than a predetermined value from the lowest point of the bottom surface 330 of the inner chamber 33 of the inlet header 3. Thereby, the heat exchange tube is divided into a portion for flowing a liquid refrigerant and a portion for flowing a gaseous refrigerant, and the portion of the heat exchange tube corresponding to the first portion 211 is for flowing a liquid refrigerant and the portion of the heat exchange tube corresponding to the second portion 212 is for flowing a gaseous refrigerant.
Furthermore, although the embodiment in which the inlet header 3 is provided at the upper side of the heat exchanger or the refrigerant flows downward in the heat exchange tubes (fig. 6 to 14) is described in detail, the above embodiment is also applicable to the embodiment in which the inlet header 3 is provided at the lower side of the heat exchanger or the refrigerant flows upward in the heat exchange tubes (fig. 15).
Although the above embodiments have been described, some of the features of the above embodiments can be combined to form new embodiments.

Claims (24)

1. A heat exchanger, comprising:
a plurality of heat exchange tubes; and
an inlet header for the flow of heat exchange medium into the heat exchanger, the ends of the heat exchange tubes being connected to and in fluid communication with the inlet header,
wherein the height of the inlet collecting pipe is H, the width of the inlet collecting pipe is D, H is less than or equal to D and less than or equal to 5H, and
wherein the bottom of the inlet header is flat, at least between adjacent heat exchange tubes; or the bottom of the inlet collecting pipe comprises a curved surface part, and the minimum curvature radius of the curved surface part is more than or equal to 0.7D.
2. The heat exchanger of claim 1, further comprising:
distribution pipes disposed in the inlet header.
3. The heat exchanger of claim 1, wherein:
the inlet header has a heat exchange tube insertion opening provided in a bottom thereof, and an end of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the bottom thereof; or alternatively
The inlet header has a heat exchange tube insertion opening provided in the top, and the end of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the top of the inlet header.
4. A heat exchanger according to claim 3 wherein:
the heat exchange tube is a flat tube including a plurality of fluid passages arranged in a width direction of the flat tube, and
the end face of the end part of the heat exchange tube comprises a first part, the first part is provided with at least one opening of a fluid channel, the distance between the first part and the lowest part of the bottom surface of the inner cavity of the inlet collecting pipe is h, and h is more than or equal to 0 and less than or equal to 5mm.
5. The heat exchanger of claim 4, wherein:
the end face of the end of the heat exchange tube further comprises a second portion having at least one opening for a fluid passage, the second portion being higher than the first portion and being more than a predetermined value from the lowest point of the bottom surface of the inner cavity of the inlet header to allow, in use, the gaseous heat exchange medium in the inlet header to flow into the opening of the second portion.
6. The heat exchanger of claim 5, wherein:
a first portion of the end face of the end portion of the heat exchange tube is located on one side in the width direction of the heat exchange tube, and a second portion of the end face of the end portion of the heat exchange tube is located on the other side in the width direction of the heat exchange tube.
7. The heat exchanger of claim 5, wherein:
the second portions of the end faces of the end portions of the heat exchange tubes are located on both sides of the first portions in the width direction of the heat exchange tubes, or the first portions of the end faces of the end portions of the heat exchange tubes are located on both sides of the second portions in the width direction of the heat exchange tubes.
8. The heat exchanger of claim 5, wherein:
the end face of the end portion of the heat exchange tube extends obliquely from one edge to the other edge in the width direction of the heat exchange tube.
9. The heat exchanger of claim 5, wherein:
the end face of the end part of the heat exchange tube has a curved shape.
10. A heat exchanger according to claim 3 wherein:
the heat exchange tube comprises two sub heat exchange tubes, the distance between the end face of the end part of one of the two sub heat exchange tubes and the lowest part of the bottom surface of the inner cavity of the inlet collecting pipe is h, and h is more than or equal to 0 and less than or equal to 5mm, and the distance between the end face of the end part of the other of the two sub heat exchange tubes and the lowest point of the end part of the one sub heat exchange tube and the bottom surface of the inner cavity of the inlet collecting pipe is more than a preset value, so that the gaseous heat exchange medium in the inlet collecting pipe is allowed to flow into the other sub heat exchange tube in use.
11. A heat exchanger according to claim 3 wherein:
the plurality of heat exchange tubes includes a first heat exchange tube group including at least one first heat exchange tube and a second heat exchange tube group including at least one second heat exchange tube, an end face of an end of the first heat exchange tube being spaced apart from a lowest portion of a bottom surface of an inner cavity of the inlet header by a distance h, and 0.ltoreq.h.ltoreq.5 mm, and an end face of an end of the second heat exchange tube being higher than an end face of the end of the first heat exchange tube and spaced apart from a lowest point of the bottom surface of the inner cavity of the inlet header by a distance greater than a predetermined value to allow, in use, gaseous heat exchange medium in the inlet header to flow into the second heat exchange tube.
12. The heat exchanger of claim 11, wherein:
the first heat exchange tube group and the second heat exchange tube group are alternately arranged.
13. The heat exchanger of claim 12, wherein:
the first heat exchange tube groups and the second heat exchange tube groups are alternately arranged in a direction from an inlet side of the inlet header to the other side of the inlet header opposite to the inlet side in the longitudinal direction of the inlet header.
14. The heat exchanger of claim 11, wherein:
the first heat exchange tube group is disposed at one side in the longitudinal direction of the inlet header, and the second heat exchange tube group is disposed at the other side in the longitudinal direction of the inlet header.
15. The heat exchanger of claim 11, wherein:
the first heat exchange tube group is disposed on an upstream side of the second heat exchange tube group in a direction from an inlet side of the inlet header to the other side of the inlet header opposite to the inlet side in a longitudinal direction of the inlet header.
16. A heat exchanger according to claim 3 wherein:
the distance between the end face of the end part of the heat exchange tube and the lowest part of the bottom surface of the inner cavity of the inlet collecting pipe is h, h is more than or equal to 0 and less than or equal to 5mm,
the heat exchanger further includes: an outlet header; the air guide pipe is arranged on the inner side of the air guide pipe,
the other end of the heat exchange tube is connected to and in fluid communication with the outlet header, and the inlet and outlet of the gas duct are connected to and in fluid communication with the inlet header and the outlet header, respectively, the inlet of the gas duct being higher than the end face of the end of the heat exchange tube and at a distance from the lowest point of the bottom surface of the inner cavity of the inlet header of more than a predetermined value to allow, in use, the gaseous heat exchange medium in the inlet header to flow into the gas duct.
17. The heat exchanger of claim 16, wherein:
the plurality of heat exchange tubes are disposed on the upstream side of the air duct in a direction from the inlet side of the inlet header to the other side of the inlet header opposite to the inlet side in the longitudinal direction of the inlet header.
18. The heat exchanger of claim 16, wherein:
the inlet header includes an end cap closing an end of the inlet header, the end cap of the inlet header having a through hole, the inlet of the air duct being connected to and in fluid communication with the through hole of the end cap of the inlet header, the through hole of the end cap of the inlet header being higher than an end face of an end of a heat exchange tube and being more than a predetermined value from a lowest point of a bottom surface of an inner cavity of the inlet header to allow, in use, a gaseous heat exchange medium in the inlet header to flow into the air duct.
19. The heat exchanger of claim 18, wherein:
the outlet collecting pipe comprises an end cover for closing the end part of the outlet collecting pipe, the end cover of the outlet collecting pipe is provided with a through hole, and the outlet of the air duct is connected with the through hole of the end cover of the outlet collecting pipe.
20. The heat exchanger of claim 1, wherein:
the bottom of the inlet header is flat and configured to be horizontal in use.
21. The heat exchanger according to any one of claims 4 to 9, wherein:
the inlet header has the heat exchange tube insertion opening provided in a bottom portion, an end portion of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the bottom portion of the inlet header, and the heat exchanger further includes a distribution tube provided in the inlet header and located above a first portion of an end face of the end portion of the heat exchange tube.
22. The heat exchanger according to any one of claims 5 to 9, wherein:
the inlet header has the heat exchange tube insertion opening provided in the top, the end portions of the heat exchange tubes are inserted into the inlet header from the heat exchange tube insertion opening in the top of the inlet header, and the heat exchanger further includes a distribution tube provided in the inlet header and below the second portion of the end face of the end portions of the heat exchange tubes.
23. The heat exchanger of claim 10, wherein:
the inlet header has the heat exchange tube insertion opening provided in a bottom portion, an end portion of the heat exchange tube is inserted into the inlet header from the heat exchange tube insertion opening in the bottom portion of the inlet header, and the heat exchanger further includes a distribution tube provided in the inlet header and above an end face of an end portion of the one of the two sub heat exchange tubes; or alternatively
The inlet header has the heat exchange tube insertion opening provided in a top portion from which an end portion of the heat exchange tube is inserted into the inlet header, and the heat exchanger further includes a distribution tube provided in the inlet header and located below an end face of an end portion of the other of the two sub heat exchange tubes.
24. The heat exchanger of claim 10, wherein:
the two sub heat exchange tubes are arranged in a horizontal direction perpendicular to the longitudinal direction of the inlet header.
CN202210952879.4A 2022-08-08 2022-08-08 Heat exchanger Pending CN117570747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210952879.4A CN117570747A (en) 2022-08-08 2022-08-08 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210952879.4A CN117570747A (en) 2022-08-08 2022-08-08 Heat exchanger

Publications (1)

Publication Number Publication Date
CN117570747A true CN117570747A (en) 2024-02-20

Family

ID=89861221

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210952879.4A Pending CN117570747A (en) 2022-08-08 2022-08-08 Heat exchanger

Country Status (1)

Country Link
CN (1) CN117570747A (en)

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