US20230175747A1 - Heat exchanger and refrigeration cycle apparatus - Google Patents
Heat exchanger and refrigeration cycle apparatus Download PDFInfo
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- US20230175747A1 US20230175747A1 US17/917,617 US202017917617A US2023175747A1 US 20230175747 A1 US20230175747 A1 US 20230175747A1 US 202017917617 A US202017917617 A US 202017917617A US 2023175747 A1 US2023175747 A1 US 2023175747A1
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- 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
- F28D1/053—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 straight
- F28D1/0535—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 straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- 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
- F28D1/053—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 straight
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- 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
-
- 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
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/16—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion
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- 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
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/20—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being attachable to the element
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- 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
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
Abstract
A heat exchanger includes a first header, a second header and a plurality of heat transfer components, wherein the heat transfer components each includes a heat transfer tube extending from the first header to the second header and allowing refrigerant to flow in its inside, and an extension portion being provided in each of the heat transfer tubes and configured to promote heat transfer property of the heat transfer tubes, and wherein the extension portion includes a base portion extending from the heat transfer tube in a second direction in which air that flows between the plurality of heat transfer tubes flows, and a spacer portion extending from the base portion in the first direction and abutting the adjacent heat transfer component.
Description
- The present disclosure relates to a heat exchanger that causes heat exchange to be performed between refrigerant and air, and also relates to a refrigeration cycle apparatus.
- Heat exchangers have been known that cause heat exchange to be performed between refrigerant and air. These heat exchangers include a finless heat exchanger that has been known as not being provided with fins in the alignment direction of heat transfer tubes. Due to the absence of the fins, the finless heat exchanger does not have means to restrain the heat transfer tubes in their alignment direction. Thus, the heat transfer tubes are more likely to be bent by a thermal stress and assembly errors. This makes it difficult for the adjacent heat transfer tubes to have a uniform pitch between them. If the adjacent heat transfer tubes have a region with a smaller pitch than the other region, this causes an uneven air flow, which leads to an increase in the airflow resistance. Thus, the region with a smaller pitch is more likely to be clogged with dust and frost formed thereon.
- For the purpose of solving the above problems,
Patent Literature 1 discloses a heat exchanger provided with an auxiliary member. The auxiliary member has a shape like comb teeth extending between the adjacent heat transfer tubes along the alignment direction of refrigerant flow passages. With this configuration,Patent Literature 1 is intended to maintain the adjacent heat transfer tubes at a uniform pitch. - Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2018-162953
- The heat exchanger disclosed in
Patent Literature 1 is intended to maintain the adjacent heat transfer tubes at a uniform pitch. However, due to the absence of the fins, this heat exchanger has relatively low heat transfer property of the heat transfer tubes. - The present disclosure has been achieved to solve the above problems, and it is an object of the present disclosure to provide a heat exchanger that improves heat transfer property of heat transfer tubes, while having a uniform pitch between the heat transfer tubes, and to provide a refrigeration cycle apparatus.
- A heat exchanger according to one embodiment of the present disclosure includes: a first header being configured to collect and deliver refrigerant and extending in a first direction; a second header being configured to collect and deliver refrigerant, being disposed at a position facing the first header and extending in the first direction; and a plurality of heat transfer components each extending from the first header to the second header and being provided at intervals along the first direction, wherein the heat transfer components each includes a plurality of heat transfer tubes each extending from the first header to the second header and allowing refrigerant to flow in its inside; and an extension portion being provided in each of the heat transfer tubes and configured to promote heat transfer property of the heat transfer tubes, and wherein the extension portion includes a base portion extending from the heat transfer tube in a second direction in which air that flows between the plurality of heat transfer tubes flows; and a spacer portion extending from the base portion in the first direction and abutting the adjacent heat transfer component.
- According to one embodiment of the present disclosure, the heat exchanger includes the heat transfer components each including the heat transfer tubes and the extension portion. The extension portion includes the spacer portion extending from the base portion in the first direction and abutting the adjacent heat transfer component. The spacer portion abuts the adjacent heat transfer components, so that the heat transfer tubes can have a uniform pitch between them. The extension portion further includes the base portion extending from the heat transfer tube in the second direction, so that this improves heat transfer property of the heat transfer tube. In this manner, the heat exchanger can improve heat transfer property of the heat transfer tubes, while having a uniform pitch between the heat transfer tubes.
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FIG. 1 is a circuit diagram illustrating a refrigeration cycle apparatus according toEmbodiment 1. -
FIG. 2 is a perspective view illustrating a heat exchanger according toEmbodiment 1. -
FIG. 3 is a front view illustrating the heat exchanger according to Embodiment 1. -
FIG. 4 is a top view illustrating the heat exchanger according to Embodiment 1 with its first header removed. -
FIG. 5 is a side view illustrating a method of manufacturing the heat exchanger according to Embodiment 1. -
FIG. 6 is a top view illustrating a heat exchanger according to a first modification ofEmbodiment 1 with its first header removed. -
FIG. 7 is a top view illustrating a heat exchanger according to a second modification ofEmbodiment 1 with its first header removed. -
FIG. 8 is a top view illustrating a heat exchanger according to a third modification ofEmbodiment 1 with its first header removed. -
FIG. 9 is a top view illustrating a heat exchanger according to Embodiment 2 with its first header removed. -
FIG. 10 is a side view illustrating a method of manufacturing the heat exchanger according to Embodiment 2. -
FIG. 11 is a side view illustrating a heat exchanger according to Embodiment 3. -
FIG. 12 is a top view illustrating the heat exchanger according to Embodiment 3 with its first header removed. -
FIG. 13 is a side view illustrating a heat exchanger according to a first modification ofEmbodiment 3. -
FIG. 14 is a top view illustrating the heat exchanger according to the first modification ofEmbodiment 3 with its first header removed. -
FIG. 15 is a side view illustrating a heat exchanger according to a second modification ofEmbodiment 3. -
FIG. 16 is a top view illustrating the heat exchanger according to the second modification ofEmbodiment 3 with its first header removed. -
FIG. 17 is a top view illustrating a heat exchanger according to Embodiment 4 with its first header removed. -
FIG. 18 is a top view illustrating a heat exchanger according to a modification ofEmbodiment 4 with its first header removed. -
FIG. 19 is a front view illustrating a heat exchanger according to Embodiment 5. -
FIG. 20 is a front view illustrating a heat exchanger according to a modification ofEmbodiment 5. -
FIG. 21 is a front view illustrating a heat exchanger according to Embodiment 6. -
FIG. 22 is a front view illustrating a heat exchanger according to a modification ofEmbodiment 6. - Embodiments of a heat exchanger and a refrigeration cycle apparatus of the present disclosure will be described hereinafter with reference to the drawings. Note that the present disclosure is not limited by the embodiments described below. In addition, the relationship of sizes of the components in the drawings described below including
FIG. 1 may differ from that of actual ones. In the descriptions below, terms that represent directions are appropriately used for the sake of easily understanding the present disclosure. However, these terms are used merely for description purposes, and the present disclosure is not limited by these terms. Examples of the terms that represent directions include “upper”, “lower”, “right”, “left”, “front”, and “rear”. -
FIG. 1 is a circuit diagram illustrating arefrigeration cycle apparatus 1 according toEmbodiment 1. Therefrigeration cycle apparatus 1 is, for example, an air-conditioning device that conditions air in a room, and includes anoutdoor unit 2 and anindoor unit 3 as illustrated inFIG. 1 . Theoutdoor unit 2 is provided with, for example, acompressor 6, aflow switching device 7, aheat exchanger 8, an outdoor fan 9, and anexpansion unit 10. Theindoor unit 3 is provided with, for example, anindoor heat exchanger 11 and an indoor fan 12. - The
compressor 6, theflow switching device 7, theheat exchanger 8, theexpansion unit 10, and theindoor heat exchanger 11 are connected byrefrigerant pipes 5 to form arefrigerant circuit 4. Thecompressor 6 suctions refrigerant in a low-temperature low-pressure state, compresses the sucked refrigerant into a high-temperature high-pressure state, and discharges the compressed refrigerant. Theflow switching device 7 changes the flow direction of refrigerant in therefrigerant circuit 4, and is, for example, a four-way valve. For example, theheat exchanger 8 causes heat exchange to be performed between outside air and refrigerant. Theheat exchanger 8 functions as a condenser during cooling operation, or functions as an evaporator during heating operation. The outdoor fan 9 is a device to deliver outside air to theheat exchanger 8. - The
expansion unit 10 is a pressure reducing valve or an expansion valve to reduce the pressure of refrigerant and expand the refrigerant. Theexpansion unit 10 is, for example, an electronic expansion valve whose opening degree is adjusted. For example, theindoor heat exchanger 11 causes heat exchange to be performed between room air and refrigerant. Theindoor heat exchanger 11 functions as an evaporator during cooling operation, or functions as a condenser during heating operation. The indoor fan 12 is a device to deliver room air to theindoor heat exchanger 11. Note that refrigerant may be water or antifreeze. - Next, the operating mode of the
refrigeration cycle apparatus 1 is described. First, cooling operation is described. During cooling operation, refrigerant sucked into thecompressor 6 is compressed by thecompressor 6 into a high-temperature high-pressure gas state and then discharged. The refrigerant in the high-temperature high-pressure gas state discharged from thecompressor 6 passes through theflow switching device 7, and flows into theheat exchanger 8 that functions as a condenser. In theheat exchanger 8, the refrigerant exchanges heat with outside air delivered by the outdoor fan 9, and condenses into liquid. - The refrigerant having condensed into a liquid state flows into the
expansion unit 10, and is expanded and reduced in pressure in theexpansion unit 10, so that the refrigerant is brought into a low-temperature low-pressure two-phase gas-liquid state. The refrigerant in the two-phase gas-liquid state flows into theindoor heat exchanger 11 that functions as an evaporator. In theindoor heat exchanger 11, the refrigerant exchanges heat with room air delivered by the indoor fan 12, and evaporates into gas. At this time, the room air is cooled and thus cooling is performed in the room. The refrigerant having evaporated into a low-temperature low-pressure gas state passes through theflow switching device 7 and is sucked into thecompressor 6. - Next, heating operation is described, During heating operation, refrigerant sucked into the
compressor 6 is compressed by thecompressor 6 into a high-temperature high-pressure gas state and then discharged. The refrigerant in the high-temperature high-pressure gas state discharged from thecompressor 6 passes through theflow switching device 7 and flows into theindoor heat exchanger 11 that functions as a condenser, The refrigerant flowing into theindoor heat exchanger 11 causes heat exchange to be performed between room air delivered by the indoor fan 12, and condenses into liquid in theindoor heat exchanger 11. At this time, the room air is heated and thus heating is performed in the room. - The refrigerant having condensed into a liquid state flows into the
expansion unit 10, and is expanded and reduced in pressure in theexpansion unit 10, so that the refrigerant is brought into a low-temperature low-pressure two-phase gas-liquid state. The refrigerant in the two-phase gas-liquid state flows into theheat exchanger 8 that functions as an evaporator. In theheat exchanger 8, the refrigerant exchanges heat with outside air delivered by the outdoor fan 9, and evaporates into gas. The refrigerant having evaporated into a low-temperature low-pressure gas state passes through theflow switching device 7 and is sucked into thecompressor 6. -
FIG. 2 is a perspective view illustrating theheat exchanger 8 according toEmbodiment 1. As illustrated inFIG. 2 , theheat exchanger 8 includes afirst header 20, asecond header 30, andheat transfer components 40. InFIG. 2 and the subsequent drawings, the direction in which thefirst header 20 and thesecond header 30 extend is described as “first direction”, the direction in which air flows is described as “second direction”, and the direction of gravitational force is described as “third direction”, In thepresent Embodiment 1, the direction of gravitational force is defined as the third direction, however, the direction of gravitational force may be defined as the first direction or the second direction. Note that thepresent Embodiment 1 exemplifies a case where theheat exchanger 8 applies to an outdoor heat exchanger provided in theoutdoor unit 2. However, theheat exchanger 8 may apply to theindoor heat exchanger 11 provided in theindoor unit 3. Theheat exchanger 8 in thepresent Embodiment 1 can be used to function as a condenser or an evaporator. - The
first header 20 is a cuboid member extending in the first direction and allowing refrigerant to flow in its inside. Thefirst header 20 is configured to collect and deliver refrigerant. Note that thefirst header 20 is not limited to being formed in a cuboid shape, but may be formed in a cylindrical shape or other shape. Thefirst header 20 distributes refrigerant entering from therefrigerant pipe 5 to heattransfer tubes 50 of theheat transfer components 40, and also collects refrigerant having flowed out of theheat transfer tubes 50 to allow the refrigerant to flow out to therefrigerant pipe 5. - The
second header 30 is disposed at a position facing thefirst header 20. Thesecond header 30 is a cuboid member extending in the first direction and allowing refrigerant to flow in its inside. Thesecond header 30 is configured to collect and deliver refrigerant. Note that thesecond header 30 is not limited to being formed in a cuboid shape, but may be formed in a cylindrical shape or other shape. Thesecond header 30 distributes refrigerant entering from therefrigerant pipe 5 to theheat transfer tubes 50 of theheat transfer components 40, and also collects refrigerant having flowed out of theheat transfer tubes 50 to allow the refrigerant to flow out to therefrigerant pipe 5. -
FIG. 3 is a front view illustrating theheat exchanger 8 according toEmbodiment 1.FIG. 4 is a top view illustrating theheat exchanger 8 according toEmbodiment 1 with itsfirst header 20 removed. Theheat transfer components 40 are configured to transfer heat. As illustrated inFIGS. 2, 3, and 4 , theheat transfer components 40 extend from thefirst header 20 to thesecond header 30, and are provided at intervals along the first direction. A plurality of theheat transfer components 40 are provided. Each of theheat transfer components 40 includes aheat transfer tube 50 andextension portions 60. - The
heat transfer tube 50 is a flat tube in which a plurality offlow passages 51 are formed. Theheat transfer tube 50 may be a circular tube. Theheat transfer tube 50 is a member extending in the third direction from thefirst header 20 to thesecond header 30. Refrigerant having entered from thefirst header 20 or thesecond header 30 flows through the plurality offlow passages 51. Theheat transfer tube 50 is made of, for example, aluminum, but may be made of a different kind of metal. - The
extension portions 60 are provided to theheat transfer tube 50 and configured to promote heat transfer property of theheat transfer tube 50. Theextension portions 60 extend along the second direction from the edges of opposite end portions of theheat transfer tube 50 in the second direction. Theextension portions 60 extend in opposite directions away from each other. That is, twoextension portions 60 are provided to oneheat transfer tube 50. InFIG. 2 , asingle extension portion 60 has a length in the second direction that is slightly smaller than the length of theheat transfer tube 50 in the second direction. However, asingle extension portion 60 may have a length equal to, or greater than, that of theheat transfer tube 50. Theextension portions 60 are made of, for example, aluminum, but may be made of a different kind of metal. In addition, theextension portions 60 may be formed integrally with theheat transfer tube 50 by extrusion. Furthermore, theextension portions 60 may be formed separately from theheat transfer tube 50, and thereafter may be joined to theheat transfer tube 50. Each of theextension portions 60 includes abase portion 61 and aspacer portion 62. - The
base portion 61 is a plate-like member extending from theheat transfer tube 50 in the second direction in which air that flows between the plurality ofheat transfer tubes 50 flows. Thebase portion 61 makes up the majority of theextension portion 60, and serves the majority of the function of promoting heat transfer property of theheat transfer tube 50. - The
spacer portion 62 is a member extending from thebase portion 61 in the first direction. Thespacer portion 62 is a portion of thebase portion 61 that is bent to extend in the first direction. In thepresent Embodiment 1, thespacer portion 62 is provided at the upper end portion of thebase portion 61 in the third direction, and adjacent to thefirst header 20. Note that thespacer portion 62 may be provided at the lower end portion of thebase portion 61 in the third direction, or may be provided at a different position. As illustrated inFIG. 4 , thespacer portion 62 is connected at its base end to theheat transfer tube 50, and is bent to extend along the first direction with its tip end bent to extend along the second direction. A pair ofspacer portions 62 is provided at opposite end portions of theheat transfer tube 50. The tip ends of thespacer portions 62 extend along the second direction such that the tip ends face each other. Thespacer portions 62 extend in the first direction by a length that is set equal to the distance between the adjacentheat transfer tubes 50, that is, a pitch between the adjacentheat transfer tubes 50. - The
spacer portions 62 abut the adjacentheat transfer components 40. In thepresent Embodiment 1, thespacer portions 62 abut theheat transfer tubes 50 of theheat transfer components 40. -
FIG. 5 is a side view illustrating a method of manufacturing theheat exchanger 8 according toEmbodiment 1. Next, a method of manufacturing thespacer portions 62 is described. As illustrated inFIG. 5 , thespacer portions 62 are formed by givingcuts 63 to thebase portions 61 in the second direction, That is, thespacer portions 62 are formed by bending a portion of thebase portions 61, separated along thecuts 63 in the second direction, toward the first direction. - According to the
present Embodiment 1, theheat exchanger 8 includes theheat transfer components 40 each including theheat transfer tube 50 and theextension portions 60, and each of theextension portions 60 includes thespacer portion 62 extending from thebase portion 61 in the first direction and abutting the adjacentheat transfer member 40. Thespacer portions 62 abut the adjacentheat transfer components 40, so that theheat transfer tubes 50 can have a uniform pitch between them. Each of theextension portions 60 further includes thebase portion 61 extending from theheat transfer tube 50 in the second direction, so that this improves the heat transfer property of theheat transfer tube 50. In this manner, theheat exchanger 8 can improve heat transfer property of theheat transfer tubes 50, while having a uniform pitch between theheat transfer tubes 50. Furthermore, in a case where thespacer portions 62 are provided at the center of thebase portions 61 in the third direction, thespacer portions 62 can further minimize the variations in the pitch between theheat transfer tubes 50 in the third direction. Theheat exchanger 8 allows theheat transfer tubes 50 to have a uniform pitch between them, and thus can minimize an uneven air flow and minimize the increase in power of the outdoor fan 9. - Each of the
spacer portions 62 is a portion of thebase portion 61 that is bent to extend in the first direction. This brings thespacer portions 62 into surface contact with theheat transfer components 40, not into line contact with theheat transfer components 40, and thus can ensure a stable pitch between theheat transfer tubes 50. Furthermore, thespacer portions 62 abut theheat transfer tubes 50. In this manner, thespacer portions 62 abut theheat transfer tubes 50 of high rigidity, and thus can ensure a stable pitch between theheat transfer tubes 50. - A related-art heat exchanger provided with an auxiliary member has been disclosed, in which the auxiliary member has a shape like comb teeth extending between the adjacent heat transfer tubes along the alignment direction of refrigerant flow passages. However, in this related-art technique, since the auxiliary member is provided separately from the heat transfer tubes, this leads to an increase in the number of parts. Since the related-art technique involves a process of assembling the auxiliary member, this also leads to an increase in the number of manufacturing processes. In contrast to this, in the
present Embodiment 1, theheat transfer tube 50 can be formed integrally with theextension portions 60. This can reduce the number of parts, and accordingly reduce the number of manufacturing processes. -
FIG. 6 is a top view illustrating aheat exchanger 108 according to a first modification ofEmbodiment 1 with itsfirst header 20 removed. In the first modification as illustrated inFIG. 6 , there are a plurality of theheat transfer tubes 50 disposed along the second direction. The first modification exemplifies a case where twoheat transfer tubes 50 are disposed along the second direction. However, three or moreheat transfer tubes 50 may be disposed. Thebase portions 61 of theextension portions 60 are provided at three locations including one end side (on the left side inFIG. 6 ) of one (on the left side inFIG. 6 ) of theheat transfer tubes 50, the other end side (on the right side inFIG. 6 ) of the other heat transfer tube 50 (on the right side inFIG. 6 ), and the middle between one and the other of theheat transfer tubes 50. Note that only one or twobase portions 61 may be provided, or four ormore base portions 61 may be provided. The first modification also achieves the same effects as those achieved inEmbodiment 1. -
FIG. 7 is a top view illustrating aheat exchanger 208 according to a second modification ofEmbodiment 1 with itsfirst header 20 removed,FIG. 7 illustrates only two adjacentheat transfer components 40 among manyheat transfer components 40 arranged in line. In the second modification as illustrated in Fig, 7,spacer portions 262 abut theadjacent extension portions 60. The second modification also achieves the same effects as those achieved inEmbodiment 1. -
FIG. 8 is a top view illustrating aheat exchanger 308 according to a third modification ofEmbodiment 1 with itsfirst header 20 removed. Fig, 8 illustrates only two adjacentheat transfer components 40 among manyheat transfer components 40 arranged in line. In the third modification as illustrated inFIG. 8 ,spacer portions 362 are formed in an embossed shape extending in the first direction and then bent back. Specifically, each of thespacer portions 362 is connected at its base end to theheat transfer tube 50, then bent at a right angle to extend along the first direction, and then bent at a right angle to extend along the second direction. Then, each of thespacer portions 362 is bent at a right angle to extend back toward the direction opposite to the first direction mentioned above, and then bent at a right angle to extend along the second direction. In the manner as described above, each of thespacer portions 362 includes a protrudingportion 362 a. The protrudingportion 362 a abuts theadjacent extension portion 60. In this manner, instead of the tip end of thespacer portion 362, the protrudingportion 362 a of thespacer portion 362 abuts theextension portion 60, so that this increases the rigidity of thespacer portion 362. -
FIG. 9 is a top view illustrating aheat exchanger 408 according toEmbodiment 2 with itsfirst header 20 removed.FIG. 9 illustrates only two adjacentheat transfer components 40 among manyheat transfer components 40 arranged in line. Theheat exchanger 408 in thepresent Embodiment 2 is different in the shape ofspacer portions 462 from the heat exchangers inEmbodiment 1. In thepresent Embodiment 2, the components in common withEmbodiment 1 are denoted by the same reference signs, and thus descriptions thereof are omitted. The differences fromEmbodiment 1 are mainly described below. - As illustrated in
FIG. 9 , each of thespacer portions 462 is a portion of thebase portion 61 that is bent to extend in the first direction. Thespacer portions 462 are different from the spacer portions inEmbodiment 1 in that thespacer portions 462 have a planar shape in top view. -
FIG. 10 is a side view illustrating a method of manufacturing theheat exchanger 408 according toEmbodiment 2. Next, a method of manufacturing thespacer portions 462 is described. As illustrated inFIG. 10 , thespacer portions 462 are formed by giving thecuts 63 to thebase portions 61 in the third direction. That is, thespacer portions 462 are formed by bending a portion of thebase portions 61, separated along thecuts 63 in the third direction, toward the first direction. With this method, thespacer portions 462 have a planar shape in top view as illustrated inFIG. 9 . Note thatEmbodiment 2 exemplifies a case where thespacer portions 462 are provided at both the upper end and the lower end of thebase portions 61. However, thespacer portions 462 may be provided at either the upper end or the lower end, or may be provided at a different position. - According to the
present Embodiment 2, thespacer portions 462 are formed by bending a portion of thebase portions 61, separated along thecuts 63 in the third direction, toward the first direction. With this configuration, when theheat exchanger 408 functions as an evaporator, thespacer portions 462 can receive condensed water flowing down theheat transfer tubes 50. Therefore, this can help prevent interference with drainage of the condensed water from theheat exchanger 408. -
FIG. 11 is a side view illustrating aheat exchanger 508 according toEmbodiment 3. Theheat exchanger 508 in thepresent Embodiment 3 is different in the shape ofspacer portions 562 from the heat exchangers inEmbodiments present Embodiment 3, the components in common withEmbodiments Embodiments - As illustrated in
FIG. 11 , each of thespacer portions 562 is a portion of thebase portion 61 that is cut and raised to extend in the first direction. Thespacer portions 562 are formed by giving thecuts 63 to thebase portions 61 in the second direction. Thespacer portions 562 are provided on the upper portion of thebase portions 61 in the third direction. However, thespacer portions 562 may be provided on the lower portion or the central portion of thebase portions 61 in the third direction. -
FIG. 12 is a top view illustrating theheat exchanger 508 according toEmbodiment 3 with itsfirst header 20 removed.FIG. 12 illustrates two adjacentheat transfer components 40 among manyheat transfer components 40 arranged in line. As illustrated inFIG. 12 , thespacer portions 562 are disposed at a position except at the edge portion of thebase portions 61, so that in top view, thespacer portions 562 are disposed in between thebase portions 61. - According to the
present Embodiment 3, each of thespacer portions 562 is a portion of thebase portion 61 that is cut and raised to extend in the first direction. This decreases the area of thespacer portions 562, and results in an increased area of thebase portions 61 accordingly. Therefore, the effective heat transfer area can still be maintained in theextension portions 60 in their entirety. -
FIG. 13 is a side view illustrating aheat exchanger 608 according to a first modification ofEmbodiment 3. In the first modification as illustrated inFIG. 13 ,spacer portions 662 are formed by giving thecuts 63 to thebase portions 61 in the third direction in which theheat transfer tubes 50 extend. Thespacer portions 662 are provided on the upper portion of thebase portions 61 in the third direction. However, thespacer portions 662 may be provided on the lower portion or the central portion of thebase portions 61 in the third direction. -
FIG. 14 is a top view illustrating theheat exchanger 608 according to the first modification ofEmbodiment 3 with itsfirst header 20 removed.FIG. 14 illustrates only two adjacentheat transfer components 40 among manyheat transfer components 40 arranged in line. As illustrated inFIG. 14 , thespacer portions 662 are disposed at a position except at the edge portion of thebase portions 61, so that in top view, thespacer portions 662 are disposed in between thebase portions 61. - According to the first modification, each of the
spacer portions 662 is a portion of thebase portion 61 that is cut and raised to extend in the first direction. This decreases the area of thespacer portions 662, and results in an increased area of thebase portions 61 accordingly. Therefore, similarly toEmbodiment 3, the effective heat transfer area can still be maintained in theextension portions 60 in their entirety. Thespacer portions 662 are formed by bending a portion of thebase portions 61, separated along thecuts 63 in the third direction, toward the first direction. With this configuration, thespacer portions 662 can receive condensed water flowing down theheat transfer tubes 50. Therefore, this can help prevent interference with drainage of the condensed water from theheat exchanger 608. -
FIG. 15 is a side view illustrating aheat exchanger 708 according to a second modification ofEmbodiment 3. In the second modification as illustrated inFIG. 15 ,spacer portions 762 are formed in a burring shape by punchingholes 64 in thebase portions 61. Thespacer portions 762 are provided on the upper portion of thebase portions 61 in the third direction. However, thespacer portions 762 may be provided on the lower portion or the central portion of thebase portions 61 in the third direction. -
FIG. 16 is a top view illustrating theheat exchanger 708 according to the second modification ofEmbodiment 3 with itsfirst header 20 removed.FIG. 16 illustrates only two adjacentheat transfer components 40 among manyheat transfer components 40 arranged in line. As illustrated inFIG. 16 , thespacer portions 762 are disposed at a position except at the edge portion of thebase portions 61, so that in top view, thespacer portions 762 are disposed in between thebase portions 61. - According to the second modification, each of the
spacer portions 762 is a portion of thebase portion 61 that is cut and raised to extend in the first direction. This decreases the area of thespacer portions 762, and results in an increased area of thebase portions 61 accordingly. Therefore, similarly toEmbodiment 3, the effective heat transfer area can still be maintained in theextension portions 60 in their entirety. -
FIG. 17 is a top view illustrating aheat exchanger 808 according toEmbodiment 4 with itsfirst header 20 removed. Theheat exchanger 808 in thepresent Embodiment 4 is different in the shape ofspacer portions 862 from the heat exchangers inEmbodiments 1 to 3. In thepresent Embodiment 4, the components in common withEmbodiments 1 to 3 are denoted by the same reference signs, and thus descriptions thereof are omitted. The differences fromEmbodiments 1 to 3 are mainly described below. -
FIG. 17 illustrates only one of manyheat transfer components 40 arranged in line. As illustrated inFIG. 17 , twospacer portions 862 are provided and disposed at positions symmetrical to the center of theheat transfer tube 50, and thecuts 63 are given to thebase portions 61 in the second direction. That is, one of thespacer portions 862 on one end side of theheat transfer tube 50 extends toward one adjacentheat transfer member 40, while theother spacer portion 862 on the other end side of theheat transfer tube 50 extends toward another adjacentheat transfer member 40. - According to the
present Embodiment 4, twospacer portions 862 are provided and disposed at positions symmetrical to the center of theheat transfer tube 50. Due to this configuration, when theheat transfer tubes 50 are aligned with each other during the process of assembling theheat exchanger 808, even though the front and back sides of theheat transfer tube 50 are reversed, the shape of thespacer portions 862 remains unchanged regardless of orientation. Therefore, when theheat exchanger 808 is assembled, it is unnecessary to orient a plurality ofheat transfer tubes 50 toward the same direction. This simplifies the process of aligning theheat transfer tubes 50 with each other. Note that thespacer portions 862 may be formed by bending a portion of thebase portions 61, or may be formed by cutting and raising a portion of thebase portions 61. -
FIG. 18 is a top view illustrating aheat exchanger 908 according to a modification ofEmbodiment 4 with itsfirst header 20 removed.FIG. 18 illustrates only one of manyheat transfer components 40 arranged in line. In the modification as illustrated inFIG. 18 , twospacer portions 962 are provided and disposed at positions symmetrical to the center of theheat transfer tube 50, and thecuts 63 are given to thebase portions 61 in the third direction in which theheat transfer tubes 50 extend. - According to the modification, the two
spacer portions 962 are provided and disposed at positions symmetrical to the center of theheat transfer tube 50. Due to this configuration, when theheat transfer tubes 50 are aligned with each other during the process of assembling theheat exchanger 908, even though the front and back sides of theheat transfer tube 50 are reversed, the shape of thespacer portions 962 remains unchanged regardless of orientation. Therefore, when theheat exchanger 908 is assembled, it is unnecessary to orient a plurality ofheat transfer tubes 50 toward the same direction. This simplifies the process of aligning theheat transfer tubes 50 with each other. Thespacer portions 962 are formed by bending a portion of thebase portions 61, separated along thecuts 63 in the third direction, toward the first direction. With this configuration, thespacer portions 962 can receive condensed water flowing down theheat transfer tubes 50. Therefore, this can help prevent interference with drainage of the condensed water from theheat exchanger 908. -
FIG. 19 is a front view illustrating aheat exchanger 1008 according toEmbodiment 5. Theheat exchanger 1008 in thepresent Embodiment 5 is different from the heat exchangers inEmbodiments 1 to 4 in thatspacer portions 1062 abut thefirst header 20 and thesecond header 30. In thepresent Embodiment 5, the components in common withEmbodiments 1 to 4 are denoted by the same reference signs, and thus descriptions thereof are omitted. The differences fromEmbodiments 1 to 4 are mainly described below. - As illustrated in
FIG. 19 , thespacer portions 1062 abut thefirst header 20 and thesecond header 30, and thecuts 63 are given to thebase portions 61 in the second direction. Specifically, thespacer portions 1062 provided at the upper end portion of thebase portions 61 abut thefirst header 20, while thespacer portions 1062 provided at the lower end portion of thebase portions 61 abut thesecond header 30. Thepresent Embodiment 5 exemplifies a case where thespacer portions 1062 abut thefirst header 20 and thesecond header 30. However, thespacer portions 1062 may abut either thefirst header 20 or thesecond header 30. - According to the
present Embodiment 5, thespacer portions 1062 abut thefirst header 20 or thesecond header 30. Opposite end portions of theheat transfer tubes 50 protrude from thespacer portions 1062 by a length equal to the length of insertion margin S of theheat transfer tubes 50 in the third direction. That is, when theheat transfer tubes 50 are inserted into thefirst header 20 or thesecond header 30, thespacer portions 1062 function as a guide for a worker to check the length of the insertion margin S in the third direction. Thespacer portions 1062 are located at the upper end portion and the lower end portion of thebase portions 61. This can help prevent thespacer portions 1062 from interfering with an air flow. -
FIG. 20 is a front view illustrating aheat exchanger 1108 according to a modification ofEmbodiment 5. In the modification as illustrated inFIG. 20 ,spacer portions 1162 abut thefirst header 20 and thesecond header 30. Thespacer portions 1162 are formed by giving thecuts 63 to thebase portions 61 in the third direction in which theheat transfer tubes 50 extend, and then bending a portion of thebase portions 61 corresponding to thecuts 63 toward the first direction. - According to the modification, the
spacer portions 1162 abut thefirst header 20 or thesecond header 30. Opposite end portions of theheat transfer tubes 50 protrude from thespacer portions 1162 by a length equal to the length of the insertion margin S of theheat transfer tubes 50 in the third direction. That is, when theheat transfer tubes 50 are inserted into thefirst header 20 or thesecond header 30, thespacer portions 1162 function as a guide for a worker to check the length of the insertion margin S in the third direction. Thespacer portions 1162 are located at the upper end portion and the lower end portion of thebase portions 61. This can help prevent thespacer portions 1162 from interfering with an air flow. Furthermore, thespacer portions 1162 are formed by bending a portion of thebase portions 61, separated along thecuts 63 in the third direction, toward the first direction. With this configuration, thespacer portions 1162 can receive condensed water flowing down theheat transfer tubes 50. Therefore, this can help prevent interference with drainage of the condensed water from theheat exchanger 1108. -
FIG. 21 is a front view illustrating aheat exchanger 1208 according toEmbodiment 6. Theheat exchanger 1208 in thepresent Embodiment 6 is different from the heat exchangers inEmbodiments 1 to 5 in that a plurality ofspacer portions 1262 are provided along the third direction. In thepresent Embodiment 6, the components in common withEmbodiments 1 to 5 are denoted by the same reference signs, and thus descriptions thereof are omitted. The differences fromEmbodiments 1 to 5 are mainly described below. - As illustrated in
FIG. 21 , the plurality ofspacer portions 1262 are provided and located at equal intervals along the third direction in which theheat transfer tubes 50 extend. Thespacer portions 1262 are formed by giving thecuts 63 to thebase portions 61 in the third direction in which theheat transfer tubes 50 extend. - According to the
present Embodiment 6, thespacer portions 1262 that may slightly interfere with an air flow are located at equal intervals along the third direction. This can result in equal pressure loss in the third direction in its entirety. Thus, an uneven air flow can be minimized in the third direction in its entirety. Therefore, the increase in power of the outdoor fan 9 can be minimized. -
FIG. 22 is a front view illustrating aheat exchanger 1308 according to a modification ofEmbodiment 6. In the modification as illustrated inFIG. 22 , a plurality ofspacer portions 1362 are provided, in which the number of thespacer portions 1362 is greater on the downstream side of theheat transfer tube 50 than on the upstream side thereof. Thespacer portions 1362 are formed by giving thecuts 63 to thebase portions 61 in the third direction in which theheat transfer tubes 50 extend. The modification exemplifies a case where two of thespacer portions 1362 are disposed on the upstream side of theheat transfer tube 50, while four of thespacer portions 1362 are disposed on the downstream side of theheat transfer tube 50. However, the numbers of thespacer portions 1362 on the upstream side and on the downstream side can be appropriately changed. Note that thespacer portions 1362 on the upstream side of theheat transfer tube 50 may be omitted. - According to the modification, a plurality of the
spacer portions 1362 are provided, in which the number of thespacer portions 1362 is greater on the downstream side of theheat transfer tubes 50 than on the upstream side thereof. When theheat exchanger 1308 functions as an evaporator, there is a higher probability that frost is formed on the upstream side of theheat transfer tubes 50 compared to on the downstream side thereof, In the modification, a plurality of thespacer portions 1362 are provided, in which the number of thespacer portions 1362 is greater on the downstream side of theheat transfer tubes 50 than that on the upstream side thereof. Thus, the amount of frost accumulating on thespacer portions 1362 in their entirety can be reduced. - 1: refrigeration cycle apparatus 2: outdoor unit, 3: indoor unit, 4: refrigerant circuit, 5: refrigerant pipe, 6: compressor, 7: flow switching device, 8: heat exchanger, 9: outdoor fan, 10: expansion unit, 11: indoor heat exchanger, 12: indoor fan, 20: first header, 30: second header, 40: heat transfer member, 50: heat transfer tube, 51: flow passage, 60: extension portion, 61: base portion, 62: spacer portion, 63: cut, 64: hole, 108: heat exchanger, 208: heat exchanger, 262: spacer portion, 308: heat exchanger, 362: spacer portion, 362 a: protruding portion, 408: heat exchanger, 462: spacer portion, 508: heat exchanger, 562: spacer portion, 608: heat exchanger, 662: spacer portion, 708: heat exchanger, 762: spacer portion, 808: heat exchanger, 862: spacer portion, 908: heat exchanger, 962: spacer portion, 1008: heat exchanger, 1062: spacer portion, 1108: heat exchanger, 1162: spacer portion, 1208: heat exchanger, 1262: spacer portion, 1308: heat exchanger, 1362: spacer portion
Claims (17)
1. A heat exchanger comprising:
a first header being configured to collect and deliver refrigerant and extending in a first direction;
a second header being configured to collect and deliver refrigerant, being disposed at a position facing the first header and extending in the first direction; and
a plurality of heat transfer components each extending from the first header to the second header and being provided at intervals along the first direction, wherein the heat transfer components each includes
a heat transfer tube extending from the first header to the second header and allowing refrigerant to flow in its inside; and
an extension portion being provided in each of the heat transfer tubes and configured to promote heat transfer property of the heat transfer tubes, and wherein
the extension portion includes
a base portion extending from the heat transfer tube in a second direction in which air that flows between the plurality of heat transfer tubes flows; and
a plurality of spacer portions each extending from the base portion in the first direction and abutting the adjacent heat transfer component, wherein
tip ends of the plurality of spacer portions extending such that the tip ends face each other.
2. The heat exchanger of claim 1 , wherein the spacer portion is a portion of the base portion that is bent to extend in the first direction.
3. The heat exchanger of claim 2 , wherein the spacer portion is formed by giving a cut to the base portion in the second direction.
4. The heat exchanger of claim 2 , wherein the spacer portion is formed by giving a cut to the base portion in a third direction in which the heat transfer tube extends.
5. The heat exchanger of claim 1 , wherein the spacer portion is a portion of the base portion that is cut and raised to extend in the first direction.
6. The heat exchanger of claim 5 , wherein the spacer portion is formed by giving a cut to the base portion in the second direction.
7. The heat exchanger of claim 5 , wherein the spacer portion is formed by giving a cut to the base portion in a third direction in which the heat transfer tube extends.
8. The heat exchanger of claim 5 , wherein the spacer portion is formed in a burring shape by punching a hole in the base portion.
9. The heat exchanger of claim 1 , wherein a plurality of the spacer portions are provided and disposed at positions symmetrical to a center of the heat transfer tube.
10. The heat exchanger of claim 1 , wherein the spacer portion abuts the heat transfer tube.
11. The heat exchanger of claim 1 , wherein the spacer portion abuts the extension portion.
12. The heat exchanger of claim 1 , wherein the spacer portion abuts the first header or the second header.
13. The heat exchanger of claim 1 , wherein a plurality of the spacer portions are provided and located at equal intervals along a third direction in which the heat transfer tube extends.
14. The heat exchanger of claim 1 , wherein
a plurality of the spacer portions are provided, and
a number of the spacer portions is greater on a downstream side of the heat transfer tube than on an upstream side thereof.
15. The heat exchanger of claim 1 , wherein the spacer portion is formed in an embossed shape extending in the first direction and then bent back.
16. The heat exchanger of claim 1 , wherein a plurality of the heat transfer tubes are provided along the second direction.
17. A refrigeration cycle apparatus, wherein the heat exchanger of claim 1 functions as a condenser or an evaporator.
Applications Claiming Priority (1)
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PCT/JP2020/021578 WO2021245734A1 (en) | 2020-06-01 | 2020-06-01 | Heat exchanger and refrigeration cycle apparatus |
Publications (1)
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US20230175747A1 true US20230175747A1 (en) | 2023-06-08 |
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ID=78830994
Family Applications (1)
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US17/917,617 Pending US20230175747A1 (en) | 2020-06-01 | 2020-06-01 | Heat exchanger and refrigeration cycle apparatus |
Country Status (5)
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US (1) | US20230175747A1 (en) |
EP (1) | EP4160112A4 (en) |
JP (1) | JP7353489B2 (en) |
CN (1) | CN115667830A (en) |
WO (1) | WO2021245734A1 (en) |
Family Cites Families (16)
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JPS53162945U (en) * | 1977-05-30 | 1978-12-20 | ||
JPS5628586U (en) * | 1980-03-12 | 1981-03-17 | ||
JPH04198691A (en) * | 1990-11-29 | 1992-07-20 | Toshiba Corp | Heat exchanger |
JPH066966U (en) * | 1992-06-30 | 1994-01-28 | 三菱アルミニウム株式会社 | Heat dissipation fin |
JP2000018504A (en) * | 1998-06-29 | 2000-01-18 | Ishikawajima Harima Heavy Ind Co Ltd | Slide spacer and device for line up of pipes |
JP4451981B2 (en) * | 2000-11-21 | 2010-04-14 | 三菱重工業株式会社 | Heat exchange tube and finless heat exchanger |
JP3883880B2 (en) * | 2002-02-22 | 2007-02-21 | 東芝キヤリア株式会社 | Heat exchanger |
JP2005299971A (en) * | 2004-04-08 | 2005-10-27 | Matsushita Electric Ind Co Ltd | Fin and tube type heat exchanger, and its manufacturing method |
JP2006084078A (en) * | 2004-09-15 | 2006-03-30 | Daikin Ind Ltd | Thin heat transfer tube unit of thin multitubular heat exchanger |
US9671177B2 (en) * | 2012-04-26 | 2017-06-06 | Mitsubishi Electric Corporation | Heat exchanger, method for fabricating heat exchanger, and air-conditioning apparatus |
KR20150094954A (en) * | 2014-02-12 | 2015-08-20 | 엘지전자 주식회사 | A heat exchanger |
JP2016075450A (en) * | 2014-10-09 | 2016-05-12 | 株式会社日立製作所 | Heat exchanger and air conditioner using the same |
JP2016080325A (en) * | 2014-10-22 | 2016-05-16 | カルソニックカンセイ株式会社 | Heat exchanger |
JP2018162953A (en) | 2017-03-27 | 2018-10-18 | パナソニックIpマネジメント株式会社 | Heat exchanger |
JPWO2020012549A1 (en) * | 2018-07-10 | 2021-04-30 | 三菱電機株式会社 | Heat exchanger, heat exchanger unit and refrigeration cycle device |
CN110595112A (en) * | 2019-10-30 | 2019-12-20 | 广东美的制冷设备有限公司 | Heat exchanger and air conditioner with same |
-
2020
- 2020-06-01 EP EP20938869.3A patent/EP4160112A4/en active Pending
- 2020-06-01 JP JP2022529136A patent/JP7353489B2/en active Active
- 2020-06-01 US US17/917,617 patent/US20230175747A1/en active Pending
- 2020-06-01 WO PCT/JP2020/021578 patent/WO2021245734A1/en unknown
- 2020-06-01 CN CN202080101390.5A patent/CN115667830A/en active Pending
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WO2021245734A1 (en) | 2021-12-09 |
JP7353489B2 (en) | 2023-09-29 |
EP4160112A4 (en) | 2023-07-26 |
JPWO2021245734A1 (en) | 2021-12-09 |
CN115667830A (en) | 2023-01-31 |
EP4160112A1 (en) | 2023-04-05 |
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