heat exchanger

Abstract

This heat exchanger (1A) comprises a header (20A), a support member, and an elastic sheet (70A). A heat transfer pipe (40) is connected to the header (20A), and a refrigerant flows between the header (20A) and the heat transfer pipe (40). The header (20A) is mounted on the support member, and the support member supports the header (20A). The elastic sheet (70A) is disposed between the header (20A) and the support member, the elastic sheet (70A) being elastically deformed by the weight of the header (20A) and being elastically deformed in accordance with an impact applied to the header (20A) or the support member.

Description

[Technical Field]

[0001] The present disclosure relates to heat exchange In a bowl . [Background Art]

[0002] Some heat exchangers have a header that distributes refrigerant to or collects refrigerant from heat transfer tubes, and is mounted on a support member, for example, a drain pan.

[0003] For example, Patent Document 1 discloses a heat exchanger including a circular tubular header and a plurality of drainage guide plates attached to the header, the drainage guide plates having a plate surface perpendicular to the tube axis of the header and a horizontal lower end, wherein the plurality of drainage guide plates are placed on a drain pan. [Prior Art Documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Unexamined Patent Publication No. 2010-25462 [Summary of the Invention] [Problem to be Solved by the Invention]

[0005] During manufacturing, the header may be warped or distorted from its intended shape due to the influence of gravity, thermal history, or other factors. If the header in the heat exchanger described in Patent Document 1 is warped or distorted, the header and the heat exchanger including the header will be in an unstable state, causing the heat exchanger to rattle within the drain pan.

[0006] The present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide a heat exchanger in which the header is less prone to rattling. [Means for Solving the Problem]

[0007] To achieve the above object, a heat exchanger according to the present disclosure includes a header, and First cushioning material and second cushioning materialThe header is equipped with a heat transfer tube and allows the refrigerant to flow between the heat transfer tube and the header. 1st buffer material The header and Supporting the header Support member and It is positioned between the headers and is elastically deformed by the weight of the header, as well as elastically deformed in response to impacts applied to the header or support members. The second cushioning material is positioned between the header and the support member, and has a gap between it and the header. [Effects of the Invention]

[0008] According to the structure of this disclosure, 1st buffer material The support member is positioned between the header and the support member, and is elastically deformed by the weight of the header, as well as by impacts applied to the header or support member. As a result, the header is less likely to rattle relative to the support member. [Brief explanation of the drawing]

[0009] [Figure 1] (A) Front view of the heat exchanger according to Embodiment 1 of the present disclosure, (B) Right side view of the heat exchanger, (C) Top view of the heat exchanger [Figure 2] (A) Front view of a first modified example of the heat exchanger according to Embodiment 1 of the present disclosure; (B) Right side view of the first modified example of the heat exchanger; (C) Top view of the first modified example of the heat exchanger. [Figure 3] (A) Front view of a second modified example of the heat exchanger according to Embodiment 1 of the present disclosure; (B) Right side view of the second modified example of the heat exchanger; (C) Top view of the second modified example of the heat exchanger. [Figure 4] (A) Front view of a third modified example of the heat exchanger according to Embodiment 1 of the present disclosure; (B) Right side view of the third modified example of the heat exchanger; (C) Top view of the third modified example of the heat exchanger. [Figure 5] (A) Front view of a fourth modified example of the heat exchanger according to Embodiment 1 of the present disclosure; (B) Right side view of the fourth modified example of the heat exchanger; (C) Top view of the fourth modified example of the heat exchanger. [Figure 6] (A) Front view of a fifth modified example of the heat exchanger according to Embodiment 1 of the present disclosure; (B) Right side view of the fifth modified example of the heat exchanger; (C) Top view of the fifth modified example of the heat exchanger. [Figure 7](A) Front view of the heat exchanger according to Embodiment 2 of the present disclosure, (B) Right side view of the heat exchanger, (C) Top view of the heat exchanger [Figure 8] (A) Front view of the first modified heat exchanger according to Embodiment 2 of the present disclosure, (B) Right side view of the first modified heat exchanger, (C) Top view of the first modified heat exchanger [Figure 9] (A) Front view of a second modified example of the heat exchanger according to Embodiment 2 of the present disclosure; (B) Right side view of the second modified example of the heat exchanger; (C) Top view of the second modified example of the heat exchanger. [Figure 10] (A) Front view of a third modified example of the heat exchanger according to Embodiment 2 of the present disclosure; (B) Right side view of the third modified example of the heat exchanger; (C) Top view of the third modified example of the heat exchanger. [Figure 11] (A) Front view of the heat exchanger according to Embodiment 3 of the present disclosure, (B) Right side view of the heat exchanger, (C) Top view of the heat exchanger [Figure 12] (A) Front view of the first modified heat exchanger according to Embodiment 3 of the present disclosure, (B) Right side view of the first modified heat exchanger, (C) Top view of the first modified heat exchanger [Figure 13] (A) Front view of a second modified example of the heat exchanger according to Embodiment 3 of the present disclosure; (B) Right side view of the second modified example of the heat exchanger; (C) Top view of the second modified example of the heat exchanger. [Figure 14] (A) Front view of the heat exchanger according to Embodiment 4 of the present disclosure, (B) Right side view of the heat exchanger, (C) Top view of the heat exchanger [Figure 15] (A) Front view of the first modified heat exchanger according to Embodiment 4 of the present disclosure, (B) Right side view of the first modified heat exchanger, (C) Top view of the first modified heat exchanger [Figure 16] (A) Front view of a second modified example of the heat exchanger according to Embodiment 4 of the present disclosure; (B) Right side view of the second modified example of the heat exchanger; (C) Top view of the second modified example of the heat exchanger. [Figure 17] (A) Front view of a third modified example of the heat exchanger according to Embodiment 4 of the present disclosure; (B) Right side view of the third modified example of the heat exchanger; (C) Top view of the third modified example of the heat exchanger. [Figure 18](A) Front view of a fourth modification of the heat exchanger according to Embodiment 4 of the present disclosure, (B) Right side view of the fourth modification of the heat exchanger, (C) Top view of the fourth modification of the heat exchanger [Figure 19] (A) Front view of a fifth modification of the heat exchanger according to Embodiment 4 of the present disclosure, (B) Right side view of the fifth modification of the heat exchanger, (C) Top view of the fifth modification of the heat exchanger [Figure 20] (A) Front view of a sixth modification of the heat exchanger according to Embodiment 4 of the present disclosure, (B) Right side view of the sixth modification of the heat exchanger, (C) Top view of the sixth modification of the heat exchanger [Figure 21] (A) Front view of a seventh modification of the heat exchanger according to Embodiment 4 of the present disclosure, (B) Right side view of the seventh modification of the heat exchanger, (C) Top view of the seventh modification of the heat exchanger [Figure 22] (A) Front view of the heat exchanger according to Embodiment 5 of the present disclosure, (B) Right side view of the heat exchanger, (C) Top view of the heat exchanger [Figure 23] (A) Front view of the heat exchanger according to Embodiment 6 of the present disclosure, (B) Right side view of the heat exchanger, (C) Top view of the heat exchanger [Figure 24] (A) Front view of a first modification of the heat exchanger according to Embodiment 6 of the present disclosure, (B) Right side view of the first modification of the heat exchanger, (C) Top view of the first modification of the heat exchanger [Figure 25] (A) Front view of a second modification of the heat exchanger according to Embodiment 6 of the present disclosure, (B) Right side view of the second modification of the heat exchanger, (C) Top view of the second modification of the heat exchanger [Figure 26] (A) Front view of a third modification of the heat exchanger according to Embodiment 6 of the present disclosure, (B) Right side view of the third modification of the heat exchanger, (C) Top view of the third modification of the heat exchanger [Figure 27] (A) Front view of a fourth modification of the heat exchanger according to Embodiment 6 of the present disclosure, (B) Right side view of the fourth modification of the heat exchanger, (C) Top view of the fourth modification of the heat exchanger [Figure 28] (A) Front view of a fifth modification of the heat exchanger according to Embodiment 6 of the present disclosure, (B) Right side view of the fifth modification of the heat exchanger, (C) Top view of the fifth modification of the heat exchanger [Modes for carrying out the invention]

[0010] The following describes the heat exchange according to the embodiments of this disclosure. In a bowl This will be explained in detail with reference to the drawings. In the drawings, the same or equivalent parts are denoted by the same reference numeral. Furthermore, in the Cartesian coordinate system XYZ shown in the drawings, the direction in which the tube axes of the multiple heat transfer tubes of the heat exchanger extend is the vertical direction, and the direction in which these heat transfer tubes are arranged is the left-right direction. In this case, the vertical direction is the Z-axis, the left-right direction is the X-axis, and the direction perpendicular to the Z-axis and X-axis is the Y-axis. This coordinate system will be referenced as appropriate in the following explanation.

[0011] (Embodiment 1) In the heat exchanger according to Embodiment 1, an elastic sheet is placed beneath the header to prevent rattling of the header and to suppress deformation of the heat exchanger itself due to impact. The configuration of the heat exchanger will be described with reference to Figures 1(A) to 1(C).

[0012] Figure 1(A) is a front view of the heat exchanger 1A according to Embodiment 1. Figure 1(B) is a right side view of the heat exchanger 1A. Figure 1(C) is a top view of the heat exchanger 1A. Note that Figures 1(A) to 1(C) show the overall schematic shape of the fins 50 without showing the individual shapes of the fins 50, in order to facilitate understanding. Also, although end caps are provided at the right ends of the headers 10 and 20A, Figure 1(B) omits the end caps for the sake of clarity. The same applies to Figures 2 to 22, which will be described later.

[0013] As shown in Figure 1(A), the heat exchanger 1A comprises two headers 10 and 20A that are opposite each other vertically, a plurality of heat transfer tubes 40 through which the refrigerant distributed or concentrated by the headers 10 and 20A flows, and a plurality of fins 50 that release the heat from the heat transfer tubes 40 into the surrounding air.

[0014] Header 10 and 20A are formed in a cylindrical shape, as shown in Figures 1(A) and 1(B), with their cylindrical axes oriented in the left-right direction. End caps (not shown) are inserted into the left and right ends of headers 10 and 20A. Coolant pipes (not shown) are connected to these end caps, allowing coolant to be supplied to or discharged from external equipment to headers 10 and 20A.

[0015] Furthermore, although not shown in the diagram, each of the headers 10 and 20A has a flow path formed inside for the refrigerant to flow through. As shown in Figures 1(A) and 1(B), the headers 10 and 20A are positioned opposite each other, separated in the vertical direction. Multiple heat transfer tubes 40 are connected to the headers 10 and 20A to allow the refrigerant to circulate.

[0016] Each of the heat transfer tubes 40 is made of a highly heat-conductive metal such as pure aluminum or an aluminum alloy to enhance heat transfer. Furthermore, each of the heat transfer tubes 40 has a flattened shape as shown in Figure 1(C) to further enhance heat transfer. Each of the heat transfer tubes 40 is arranged with its axis oriented vertically as shown in Figure 1(A). In addition, the upper and lower ends of each of the heat transfer tubes 40 are inserted into insertion openings (not shown) of the header 10 located above and the header 20A located below. As a result, the flow path inside the heat transfer tube 40 is connected to the flow path inside the headers 10 and 20A. Consequently, refrigerant from the headers 10 and 20A flows through the heat transfer tubes 40, and the heat of the refrigerant is transferred to the heat transfer tubes 40.

[0017] Furthermore, numerous heat transfer tubes 40 are provided in the heat exchanger 1A to increase heat exchange efficiency. The heat transfer tubes 40 are arranged at a constant pitch in the left-right direction. Although their detailed shape and arrangement are not shown in the diagram, fins 50 are provided between the heat transfer tubes 40 to efficiently dissipate the heat transferred to the heat transfer tubes 40 into the air.

[0018] The fins 50, like the heat transfer tubes 40, are made of a metal with high heat conductivity to enhance heat dissipation. Furthermore, to further enhance heat dissipation, the fins 50 have a corrugated shape (though not shown in the diagram). The fins 50 are sandwiched between the heat transfer tubes 40 with the direction of the continuous corrugations oriented vertically. As a result, heat is transferred from the heat transfer tubes 40 to the fins 50, and the fins 50 exchange heat with the surrounding air.

[0019] A heat exchanger 1A with this configuration is used, for example, by being installed in the casing of an outdoor unit of an air conditioner. However, if the heat exchanger 1A is installed in the casing as is, the header 20A may bend or distort from its intended shape due to the effects of gravity and thermal history during manufacturing, which can result in the heat exchanger 1A becoming unstable. Therefore, in order to install the header 20A in a stable state in the casing, the heat exchanger 1A includes a support plate 60 on which to place the header 20A, and a plurality of elastic sheets 70A placed between the support plate 60 and the header 20A, as shown in Figures 1(A) to 1(C).

[0020] The support plate 60 is made of metal or resin. It is shaped like a rectangular plate. The support plate 60 is positioned with its plate surface facing the bottom plate of the outdoor unit housing (not shown). Furthermore, the support plate 60 is fixed to the bottom plate of the housing by fastening members such as bolts and screws passing through through holes (not shown). Meanwhile, multiple elastic sheets 70A are placed on top of the support plate 60.

[0021] Each elastic sheet 70A is made of rubber or synthetic resin. This allows the elastic sheets 70A to be elastically deformable. To prevent displacement, the elastic sheets 70A are attached to the support plate 60 by adhesive, double-sided adhesive tape, or fastening members (not shown in the figures). Also, as shown in Figures 1(A) and 1(B), the header 20A is placed on top of the elastic sheets 70A. As a result, the elastic sheets 70A are less likely to be displaced when impact is applied from the support plate 60. Furthermore, even when impact is applied, the elastic sheets 70A elastically deform and absorb the impact. As a result, the impact is less likely to be transmitted to the header 20A. In this way, the elastic sheets 70A function as a cushioning material.

[0022] Furthermore, the elastic sheet 70A has a rectangular sheet shape. Its thickness is such that it can still elastically deform even when further force is applied after the header 20A has been placed on it and elastically deformed by the weight of the header 20A. With such a thickness, even if the header 20A is warped or distorted, the elastic sheet 70A can contact the entire portion of the header 20A on which it is placed and support the whole. The multiple elastic sheets 70A are arranged apart from each other in the direction of the cylindrical axis from which the header 20A extends, as shown in Figure 1(A). As a result, the multiple elastic sheets 70A evenly support the entire header 20A. Consequently, the header 20A is less likely to rattle on the support plate 60 and remains stable on the support plate 60.

[0023] In Figure 1(A), the elastic sheets 70A are arranged at different pitches, but they may also be arranged at equal pitches. Furthermore, the thickness, width, and length of the elastic sheets 70A may differ from one another. Similarly, the hardness of the elastic sheets 70A may also differ from one another. The support plate 60 described above is an example of a support member as defined in this disclosure.

[0024] As described above, in the heat exchanger 1A according to Embodiment 1, the elastic sheet 70A is positioned between the header 20A and the support plate 60, and is elastically deformed by the weight of the header 20A, as well as elastically deformed in response to impacts applied to the header 20A or the support plate 60. For this reason, the header 20A is less likely to rattle relative to the support plate 60. Furthermore, in the heat exchanger 1A, even if an impact is applied to the support plate 60, that impact is less likely to be transmitted to the header 20A.

[0025] Furthermore, even if the header 20A is warped or distorted, it can be placed stably on the support plate 60. Also, the header 20A is less prone to rattling. As a result, for example, even if the heat exchanger 1A vibrates vertically during transport, the elastic sheet 70A absorbs the vibration, so the header 20A can maintain a stable state on the support plate 60. In addition, as a result of the header 20A being stable on the support plate 60, impacts are less likely to be applied to the joint between the header 20A and other components, for example, the joint between the header 20A and the heat transfer tube 40, thereby increasing the reliability of the heat exchanger 1A.

[0026] The heat exchanger 1A may be manufactured by a method comprising (1) the step of manufacturing headers 10 and 20A to which heat transfer tubes 40 and fins 50 are attached, and (2) the step of placing an elastic sheet 70A between header 20A and a support plate 60, which can be elastically deformed in response to an impact applied to either header 20A or the support plate 60. In the step of placing the elastic sheet 70A, the header 20A may be positioned above the support plate 60 so that the elastic sheet 70A is elastically deformed by the weight of header 20A, thereby supporting header 20A on the support plate 60.

[0027] (First modified example of heat exchanger 1A) In Embodiment 1, the header 20A is cylindrical. However, the header 20A is not limited to this. The header 20A can be any shape as long as it is connected to the heat transfer tube 40 and allows the coolant to flow between it and the heat transfer tube 40.

[0028] Figure 2(A) is a front view of a first modified example of the heat exchanger 1A according to Embodiment 1. Figure 2(B) is a right side view of the first modified example of the heat exchanger 1A. Figure 2(C) is a top view of the first modified example of the heat exchanger 1A.

[0029] As shown in Figures 2(A)-2(C), the header 20A may be rectangular tubular in shape. More specifically, as shown in Figure 2(B), the header 20A may be a rectangular tube with a square cross-section. Even with such a shape, rattling of the header 20A can be prevented by placing the elastic sheet 70A between the header 20A and the support plate 60.

[0030] (Second and third modified versions of heat exchanger 1A) Furthermore, in Embodiment 1, the header 20A extends in a straight line. However, the header 20A is not limited to this. The shape of the header 20A is arbitrary as long as the above-mentioned conditions are met, and for example, it may be curved.

[0031] Figure 3(A) is a front view of a second modified example of the heat exchanger 1A according to Embodiment 1. Figure 3(B) is a right side view of the second modified example of the heat exchanger 1A. Figure 3(C) is a top view of the second modified example of the heat exchanger 1A. Figure 4(A) is a front view of a third modified example of the heat exchanger 1A. Figure 4(B) is a right side view of the third modified example of the heat exchanger 1A. Figure 4(C) is a top view of the third modified example of the heat exchanger 1A.

[0032] As shown in Figures 3(A)-3(C), the header 20A may be curved vertically. For example, the header 20A may be curved upwards in a convex shape. In this case, it is preferable that an elastic sheet 71A, thicker than the gap between the header 20A and the support plate 60, be elastically deformed and placed at the portion P1 furthest from the support plate 60 when the header 20A is curved upwards in a convex shape. Alternatively, although not shown, multiple elastic sheets 70A may be stacked until they become thicker than the gap between the portion P1 and the support plate 60. This arrangement prevents the header 20A from rattling.

[0033] Furthermore, as shown in Figures 4(A)-4(C), the header 20A may be curved downwards in a convex shape. In this case, it is preferable that an elastic sheet 72A, thicker than the gap between the portion P2 of the header 20A that is closest to the support plate 60 due to the curve of the header 20A, be placed thereon. The elastic sheet 72A then elastically deforms to fill the gap and support the header 20A.

[0034] Furthermore, each of the elastic sheets 70A supporting both ends of the header 20A may be formed by stacking multiple elastic sheets thinner than the elastic sheet 70A, for example, elastic sheet 72A.

[0035] (Fourth and fifth modified versions of heat exchanger 1A) Furthermore, in Embodiment 1, the three elastic sheets 70A are arranged apart from each other in the cylindrical axial direction of the header 20A, and as a result, the three elastic sheets 70A evenly support the entire header 20A. However, the arrangement and number of elastic sheets 70A are not limited to this.

[0036] Figure 5(A) is a front view of a fourth modified example of the heat exchanger 1A according to Embodiment 1. Figure 5(B) is a right side view of the fourth modified example of the heat exchanger 1A. Figure 5(C) is a top view of the fourth modified example of the heat exchanger 1A. Figure 6(A) is a front view of a fifth modified example of the heat exchanger 1A. Figure 6(B) is a right side view of the fifth modified example of the heat exchanger 1A. Figure 6(C) is a top view of the fifth modified example of the heat exchanger 1A.

[0037] As shown in Figures 5(A)-5(C), the header 20A may include elastic sheets 70A that support each end of the header 20A in the direction of the cylindrical axis, i.e., the +X end and -X end of the header 20A, and elastic sheet 73A that is thinner than elastic sheet 70A and positioned below the center of the header 20A in the X direction. In this case, there may be a gap between elastic sheet 73A and header 20A. Furthermore, when downward impacts such as earthquakes or vibrations during transport are applied to the heat exchanger 1A, the elastic sheet 73A may come into contact with header 20A and absorb the impact on header 20A.

[0038] As shown in Figures 6(A)-6(C), multiple elastic sheets 73A may be provided. In this configuration, similar to the fourth modified example shown in Figures 5(A)-5(C), when a downward impact is applied to the heat exchanger 1A, the elastic sheets 73A can come into contact with the header 20A and absorb the impact on the header 20A.

[0039] (Embodiment 2) In Embodiment 1, the header 20A is cylindrical and formed from a single component. However, the header 20A is not limited to this. As described above, the header 20A only needs to have heat transfer tubes 40 connected to it and to allow refrigerant to flow between it and the heat transfer tubes 40. As long as this condition is met, it may be formed by combining multiple components.

[0040] In the heat exchanger 1B according to Embodiment 2, the header 20B is formed by combining two components. The heat exchanger 1B according to Embodiment 2 will be described below with reference to Figures 7(A) to 7(C). Embodiment 2 will be described mainly for its configuration which differs from that of Embodiment 1.

[0041] Figure 7(A) is a front view of the heat exchanger 1B according to Embodiment 2. Figure 7(B) is a right side view of the heat exchanger 1B. Figure 7(C) is a top view of the heat exchanger 1B.

[0042] As shown in Figures 7(A)-7(C), the header 20B has a lower member 21L having a groove 214 and an upper member 21U that covers the lower member 21L.

[0043] As shown in Figure 7(B), the lower member 21L is formed in a U-shape with the opening facing upwards in a side view. More specifically, the lower member 21L has a side wall portion 211 that extends linearly in the vertical direction, i.e., the Z direction, a side wall portion 212 that extends linearly in the Z direction and faces the side wall portion 211 in the front-rear direction, i.e., the Y direction, and a bottom portion 213 that curves in the -Z direction and extends in the Y direction, connecting the -Z ends of the side wall portions 211 and 212. As a result, the side wall portions 211 and 212 and the bottom portion 213 form an internal space, i.e., a groove 214, with the +Z side open. And, although not shown, the groove 214 functions as a flow path.

[0044] In contrast, the upper member 21U, as shown in Figure 7(B), is formed in a U-shape with the opening facing downwards in a side view and overlaps the lower member 21L. More specifically, the upper member 21U has a side wall portion 215 that extends linearly in the Z direction in a side view and contacts the +Y surface, i.e., the outer wall surface, of the side wall portion 211 of the lower member 21L; a side wall portion 216 that extends linearly in the Z direction and contacts the -Y surface, i.e., the outer wall surface, of the side wall portion 212 of the lower member 21L; and an upper surface portion 217 that curves in the +Z direction and extends in the Y direction, connecting the +Z ends of the side wall portions 215 and 216. The side wall portions 215 and 216 are brazed to the side wall portions 211 and 212 of the lower member 21L at the points where they contact the side wall portions 211 and 212, although these are not shown in the figure.

[0045] The upper member 21U, with this configuration, covers the lower member 21L from above, closing the opening of the groove 214. Furthermore, as shown in Figures 7(A) and 7(B), the side walls 215 and 216 of the upper member 21U extend in the X direction, thereby covering the entire groove 214 that extends in the same direction. As a result, the upper member 21U, together with the lower member 21L, forms an oval-shaped tube in cross-section through which the refrigerant can flow.

[0046] Thus, the header 20B is formed by combining the lower member 21L and the upper member 21U. In the case of the header 20B, as with the header 20A described in Embodiment 1, there may be rattle on the +Z side of the support plate 60. Therefore, in the header 20B, the bottom portion 213 of the lower member 21L, which is located furthest to the -Z side of the header 20B, is placed on the +Z surface of the elastic sheet 70B. This prevents rattling of the header 20B. In addition, because the header 20B is supported by the elastic sheet 70B, shocks are less likely to be transmitted to it.

[0047] The side wall portions 211 and 212 of the lower member 21L described above are examples of the first and second side wall portions as defined in this disclosure. The -Z ends of the side wall portions 211 and 212 are examples of the lower ends of the first and second side wall portions as defined in this disclosure. The side wall portions 215 and 216 of the upper member 21U are examples of the third and fourth side wall portions as defined in this disclosure. The +Z ends of the side wall portions 215 and 216 are examples of the upper ends of the third and fourth side wall portions as defined in this disclosure. Furthermore, the top surface portion 217 is an example of the first top surface portion as defined in this disclosure.

[0048] As described above, in the heat exchanger 1B according to Embodiment 2, the bottom 213 of the lower member 21L is supported by the elastic sheet 70B. Therefore, even though the header 20B is formed by combining the upper member 21U and the lower member 21L, it is less prone to rattling. In addition, impacts are less likely to be transmitted to the header 20B.

[0049] (Heat exchanger 1B, first modified example) In Embodiment 2, the upper surface portion 217 of the upper member 21U and the bottom portion 213 of the lower member 21L of the header 20B are curved. As a result, the header 20B has an oval shape when viewed in cross-section. However, the header 20B is not limited to this. The header 20B may also be rectangular.

[0050] Figure 8(A) is a front view of a first modified example of the heat exchanger 1B according to Embodiment 2. Figure 8(B) is a right side view of the first modified example of the heat exchanger 1B. Figure 8(C) is a top view of the first modified example of the heat exchanger 1B.

[0051] As shown in Figures 8(A)-8(C), in the header 20B, the top surface 217 of the upper member 21U and the bottom surface 213 of the lower member 21L may extend linearly in the Y direction in a side view and be parallel to the XY plane. As a result, the upper member 21U may extend elongated in the X direction, with the -Z side open and forming a rectangular box shape. Similarly, the lower member 21L may extend elongated in the X direction, with the +Z side open and forming a rectangular box shape. Furthermore, because the upper member 21U and the lower member 21L have such shapes, the header 20B may be in the shape of a square tube. Even with such shapes, rattling of the header 20B can be prevented by placing the elastic sheet 70B between the header 20B and the support plate 60.

[0052] (Second and third modified versions of heat exchanger 1B) Furthermore, the header 20B according to Embodiment 2 may be curved, as described in Embodiment 1.

[0053] Figure 9(A) is a front view of a second modified example of the heat exchanger 1B according to Embodiment 2. Figure 9(B) is a right side view of the second modified example of the heat exchanger 1B. Figure 9(C) is a top view of the second modified example of the heat exchanger 1B. Figure 10(A) is a front view of a third modified example of the heat exchanger 1B. Figure 10(B) is a right side view of the third modified example of the heat exchanger 1B. Figure 10(C) is a top view of the third modified example of the heat exchanger 1B.

[0054] As shown in Figures 9(A) and 9(C), the header 20B may be curved in the Z direction. For example, the header 20B may be curved convexly toward the +Z side, similar to the header 20A described in the second modification of Embodiment 1. In this case as well, similar to the header 20A in the second modification, an elastic sheet 71B thicker than the gap from part P1 to the support plate 60 may be placed on part P1 of the header 20B, or, although not shown, multiple elastic sheets 70A may be stacked. This arrangement prevents rattling of the header 20B.

[0055] Furthermore, as shown in Figures 10(A)-10(C), the header 20B may be curved downwards in a convex shape, similar to the header 20A described in the third modification of Embodiment 1. In this case as well, similar to the header 20A in the third modification, it is preferable to place an elastic sheet 72B thicker than the gap from portion P2 to the support plate 60 in portion P2. The elastic sheet 72A then elastically deforms to fill the gap and support the header 20B.

[0056] In addition, similar to the third modification of Embodiment 1, each of the elastic sheets 70B supporting both ends of the header 20B may be formed by stacking multiple elastic sheets thinner than the elastic sheet 70B, for example, multiple elastic sheets 72B.

[0057] (Embodiment 3) In Embodiment 2, the upper member 21U of the header 20B covers the entire lower member 21L from the +Z side, but the upper member 21U may only cover the groove 214 of the lower member 21L.

[0058] In the heat exchanger 1C according to Embodiment 3, the upper member 22U of the header 20C fits over the groove 224 of the lower member 22L. The heat exchanger 1C according to Embodiment 3 will be described below with reference to Figures 11(A) to 11(C). Embodiment 3 will be described mainly for its configuration which differs from Embodiments 1 and 2.

[0059] Figure 11(A) is a front view of the heat exchanger 1C according to Embodiment 3. Figure 11(B) is a right side view of the heat exchanger 1C. Figure 11(C) is a top view of the heat exchanger 1C.

[0060] As shown in Figures 11(A)-11(C), in heat exchanger 1C, the depth of the lower member 22L in the front-to-back direction, i.e., the depth in the Y direction, is longer than the depth in the Y direction of the lower member 21L of heat exchanger 1B according to Embodiment 2. Also, the height of the lower member 22L in the vertical direction, i.e., the height in the Z direction, is higher than the height in the Z direction of the lower member 21L in Embodiment 2. In short, as shown in Figure 11(B), the side walls 221, 222 and bottom 223 of the lower member 22L are larger by a certain ratio than those of the lower member 21L of heat exchanger 1B, and as a result, the lower member 22L is slightly larger in side view than the lower member 21L of heat exchanger 1B.

[0061] In contrast, in the upper member 22U, the side wall portion 225 extends linearly in the Z direction along the inner wall of the side wall portion 221 of the lower member 22L. Also, the side wall portion 226 extends linearly in the Z direction along the inner wall of the side wall portion 222, which is opposite to the inner wall of the side wall portion 221 of the lower member 22L. Furthermore, the side wall portions 225 and 226 of the upper member 22U face each other in the Y direction and extend from the inside to the outside of the groove 224 to the same Z height. In addition, the +Z ends of the side wall portions 225 and 226 are connected by an upper surface portion 227 that is curved in the +Z direction. Also, the side wall portions 225 and 226 are brazed to the side wall portions 221 and 222 of the lower member 22L at the point where they are in contact with the outer wall surface of the side wall portions 221 and 222.

[0062] The upper member 22U, by having this configuration, closes the opening of the groove 224 in the lower member 22L. As a result, the upper member 22U and the lower member 22L form an oval-shaped tube in cross-section.

[0063] In the header 20C, the upper member 21U only blocks the groove 224 of the lower member 21L. However, even with this configuration, the header 20C may rattle on the +Z side of the support plate 60. Therefore, to prevent this rattle, the bottom 223 of the lower member 22L, which is located furthest to the -Z side of the header 20B, is placed on the +Z surface of the elastic sheet 70C. This prevents rattle of the header 20C and also prevents the transmission of impact from the support plate 60 to the header 20B.

[0064] The side wall portions 221 and 222 of the lower member 22L described above are examples of the first and second side wall portions as defined in this disclosure. The -Z ends of the side wall portions 221 and 222 are examples of the lower ends of the first and second side wall portions as defined in this disclosure. The side wall portions 225 and 226 of the upper member 22U are examples of the fifth and sixth side wall portions as defined in this disclosure. The +Z ends of the side wall portions 225 and 226 are examples of the upper ends of the fifth and sixth side wall portions as defined in this disclosure. Furthermore, the top surface portion 227 is an example of the second top surface portion as defined in this disclosure.

[0065] As described above, in the heat exchanger 1C according to Embodiment 3, the bottom 223 of the lower member 22L is supported by the elastic sheet 70C, similar to Embodiment 2. Therefore, the header 20C is less prone to rattling, even when the upper member 21U is fitted into the groove 224 of the lower member 21L, closing the opening of the groove 224. In addition, impacts are less likely to be transmitted to the header 20C.

[0066] (First and second modified versions of heat exchanger 1C) Furthermore, the header 20C according to Embodiment 3 may be curved, as described in Embodiments 1 and 2.

[0067] Figure 12(A) is a front view of a first modified example of the heat exchanger 1C according to Embodiment 3. Figure 12(B) is a right side view of the first modified example of the heat exchanger 1C. Figure 12(C) is a top view of the first modified example of the heat exchanger 1C. Figure 13(A) is a front view of a second modified example of the heat exchanger 1C. Figure 13(B) is a right side view of the second modified example of the heat exchanger 1C. Figure 13(C) is a top view of the second modified example of the heat exchanger 1C.

[0068] As shown in Figures 12(A) and 12(C), the header 20C may be curved in the Z direction. For example, the header 20C may be curved convexly toward the +Z side, similar to the headers 20A and 20B described in the second modification of Embodiments 1 and 2. In this case as well, similar to the second modification of Embodiments 1 and 2, an elastic sheet 71C thicker than the gap from portion P1 to the support plate 60 may be placed on portion P1 of the header 20C, or, although not shown, multiple elastic sheets 70C may be stacked. This arrangement prevents rattling of the header 20C.

[0069] As shown in Figures 13(A)-13(C), the headers 20A and 20B described in the third modified example of Embodiments 1 and 2 may be curved downwards in a convex shape. In this case as well, similar to the headers 20A and 20B of the third modified example, an elastic sheet 72C thicker than the gap from part P2 to the support plate 60 is placed in part P2, and the elastic sheet 72C elastically deforms to close the gap and support the header 20C.

[0070] Furthermore, similar to the third modification in Embodiments 1 and 2, each of the elastic sheets 70C supporting both ends of the header 20C may be formed by stacking multiple elastic sheets thinner than the elastic sheet 70C, for example, elastic sheet 72C.

[0071] (Embodiment 4) In Embodiment 2, the upper member 21U of the header 20B is placed over the lower member 21L, and the side walls 215 and 216 of the upper member 21U are brazed to the side walls 211 and 212 of the lower member 21L. In Embodiment 3, the upper member 22U of the header 20C is fitted into the groove 224 of the lower member 22L, and the side walls 225 and 226 of the upper member 22U are brazed to the side walls 221 and 222 of the lower member 22L. However, the headers 20B and 20C are not limited to these. The upper members 21U and 22U and the lower members 21L and 22L may be joined by methods other than brazing.

[0072] In the heat exchanger 1D according to Embodiment 4, the upper member 23U of the header 20D is joined to the lower member 23L by claws 31 and 32. The heat exchanger 1D according to Embodiment 4 will be described below with reference to Figures 14(A) to 14(C). Embodiment 4 will be described mainly for its configuration which differs from that of Embodiments 1-3.

[0073] Figure 14(A) is a front view of the heat exchanger 1D according to Embodiment 4. Figure 14(B) is a right side view of the heat exchanger 1D. Figure 14(C) is a top view of the heat exchanger 1D.

[0074] Note that in Figure 14(A), for ease of understanding, the lengths of the claw portions 31 and 32 are shown as the same in a front view, but in reality, the claw portion 31 is longer and the claw portion 32 is shorter in a front view.

[0075] As shown in Figures 14(A)-14(C), the header 20D has claw portions 31 and 32 for fixing the lower member 23L to itself.

[0076] As shown in Figure 14(B), in the header 20D, the upper surface portion 237 of the upper member 23U is longer in the Y direction than the bottom portion 233 of the lower member 23L, and as a result, similar to the second embodiment, the upper member 23U overlaps the lower member 23L in a side view. Also, the side wall portions 235 and 236 of the upper member 23U are in contact with the outer wall surfaces of the side wall portions 231 and 232 of the lower member 23L. The claw portions 31 and 32 are provided at the -Z ends of the side wall portions 235 and 236 of the upper member 23U, respectively.

[0077] The claw portion 31 has a shape in which a rectangular prism is bent along the bottom 233 of the lower member 23L. On the other hand, the claw portion 32 has a shape in which a rectangular prism extends straight in the -Z direction. Of the claw portions 31 and 32, the claw portion 31 has this shape, so that the upper member 23U covers the lower member 23L and fixes the lower member 23L to itself.

[0078] Furthermore, as shown in Figures 14(A) and 14(B), the side walls 235 and 236 of the upper member 23U extend in the direction in which the groove 234 extends, that is, in the X direction in which the side walls 231 and 232 of the lower member 23L extend. The claws 31 and 32 are arranged alternately in the X direction at the lower ends of these side walls 235 and 236, respectively. As a result, of the claws 31 and 32, the claw 31 fixes the lower member 23L to the upper member 23U over the entire X direction, that is, the entire direction in which the groove 234 extends. In the upper member 23U, in addition to the brazing described in Embodiments 2 and 3, the claws 31 fix the lower member 23L to the upper member 23U, resulting in high joint strength with the lower member 23L.

[0079] As described above, the claw portion 31 is bent along the bottom portion 233 of the lower member 23L. As a result, the -Z end portion of the claw portion 31 is located on the -Z side of the bottom portion 233, as shown in Figure 14(B). Also, as described above, the claw portion 32 extends straight in the -Z direction. As a result, the -Z end portion of the claw portion 32 protrudes on the -Z side of the bottom portion 233. Because the -Z ends of the claw portions 31 and 32 are in these positions, the header 20D is prone to rattling when placed on the support plate 60. Therefore, the -Z ends of the claw portions 31 and 32 are placed on the elastic sheet 70D. This prevents rattling in the header 20D and also reduces the transmission of impact from the support plate 60.

[0080] The claws 31 and 32 provided on the side wall portion 235 of the upper member 23U are an example of the first claw portion as described in this disclosure. The claws 31 and 32 provided on the side wall portion 236 of the upper member 23U are an example of the second claw portion as described in this disclosure.

[0081] As described above, in the heat exchanger 1D according to Embodiment 4, the claw portions 31 and 32 of the upper member 23U are supported by the elastic sheet 70D. Therefore, the header 20D is less prone to rattling, even if the claw portions 31 and 32 protrude -Z side beyond the bottom portion 233 of the lower member 22L. In addition, impacts are less likely to be transmitted to the header 20D.

[0082] (Modified example of heat exchanger 1D1) In Embodiment 2-4, the upper member 23U of the header 20D according to Embodiment 4 is equipped with claw portions 31 and 32, but the upper members 21U and 22U of the headers 20B and 20C according to Embodiments 2 and 3 are not equipped with claw portions 31 and 32. Thus, the claw portions 31 and 32 can have any configuration. As a result, it is also arbitrary whether the claw portions 31 and 32 are bent or straight.

[0083] Figure 15(A) is a front view of a first modified example of the heat exchanger 1D according to Embodiment 4. Figure 15(B) is a right side view of the first modified example of the heat exchanger 1D. Figure 15(C) is a top view of the first modified example of the heat exchanger 1D.

[0084] As shown in Figures 15(A) and 15(C), the side walls 235 and 236 of the upper member 23U may each be provided with the claw portion 31 described in Embodiment 4, but may not be provided with the claw portion 32 described in Embodiment 4. As a result, all the claw portions 31 of the upper member 23U may be bent along the bottom portion 233 of the lower member 23L. In this case, it is sufficient that the elastic sheet 70D is placed on the -Z side of the claw portion 31. This prevents rattling and also reduces the transmission of impact from the support plate 60.

[0085] (Second modified example of heat exchanger 1D) Furthermore, in Embodiment 4, the header 20D may also be warped.

[0086] Figure 16(A) is a front view of a second modified example of the heat exchanger 1D according to Embodiment 4. Figure 16(B) is a right side view of the second modified example of the heat exchanger 1D. Figure 16(C) is a top view of the second modified example of the heat exchanger 1D.

[0087] As shown in Figures 16(A)-16(C), a portion of the claw portion 31 of the upper member 23U may bend more than the other claw portions 31, resulting in the -Z side of the header 20D being curved upward. In this case, as a result of the header 20D being curved upward in a convex shape, an elastic sheet 71D thicker than the gap between portion P3 and the support plate 60 may be placed at the portion P3 furthest from the support plate 60, or, although not shown, multiple elastic sheets 70D may be stacked.

[0088] (Third modified example of heat exchanger 1D) In a second modified example of the heat exchanger 1D, a thick elastic sheet 71D is placed in the above-mentioned portion P3, but the heat exchanger 1D is not limited to this.

[0089] Figure 17(A) is a front view of a third modified example of the heat exchanger 1D according to Embodiment 4. Figure 17(B) is a right side view of the third modified example of the heat exchanger 1D. Figure 17(C) is a top view of a second modified example of the heat exchanger 1D.

[0090] As shown in Figures 17(A)-17(C), an elastic sheet 73D thinner than the gap from portion P3 to the support plate 60 may be placed in the portion P3 of the header 20D described above. In this case, the elastic sheet 73D may come into contact with the header 20A and absorb the impact on the header 20A when a downward impact is applied to the heat exchanger 1A, such as during an earthquake or vibration during transport.

[0091] Furthermore, each of the elastic sheets 70D supporting both ends of the header 20D may be formed by stacking multiple elastic sheets thinner than the elastic sheet 70D, for example, elastic sheet 73D.

[0092] (Fourth modified example of heat exchanger 1D) Furthermore, the lengths of the claw portions 31 and 32 provided on the upper member 23U are arbitrary.

[0093] Figure 18(A) is a front view of a fourth modified example of the heat exchanger 1D according to Embodiment 4. Figure 18(B) is a right side view of the fourth modified example of the heat exchanger 1D. Figure 18(C) is a top view of the fourth modified example of the heat exchanger 1D.

[0094] As shown in Figures 18(A) and 18(C), the upper member 23U may include the claw portion 31 described in Embodiment 4 and a claw portion 33 that is shorter in length than the claw portions 31 and 32. In this case, as shown in Figure 18(A), the claw portions 31 may be arranged between arrangement portions in which multiple claw portions 33 are arranged continuously in the X direction. Unlike the claw portion 31, the claw portion 33 is so short that it cannot be bent along the bottom portion 233 of the lower member 23L, and therefore does not protrude in the -Z direction more than the claw portion 31. Because of this shape, it is preferable that the arrangement portion in which multiple claw portions 33 are arranged continuously in the X direction is placed on the elastic sheet 70D. In that case, the claw portion 31 is not placed on the elastic sheet 70D, and as a result, it is preferable that there is a gap between the -Z end of the claw portion 31 and the support plate 60. That is, it is desirable that the claw portion 31 does not come into contact with the support plate 60.

[0095] (Modified example of heat exchanger 1D No. 5) In Embodiment 4, the claw portions 31 and 32 are placed on the elastic sheet 70D. However, the portion placed on the elastic sheet 70D is not limited to this. The elastic sheet 70D is positioned between the header 20D and the support plate 60, and is elastically deformed by the weight of the header 20D, as well as elastically deformed in response to impacts applied to the header 20D or the support plate 60. As long as this condition is met, it is arbitrary which part of the header 20D is placed on the elastic sheet 70D.

[0096] Figure 19(A) is a front view of a fifth modified example of the heat exchanger 1D according to Embodiment 4. Figure 19(B) is a right side view of the fifth modified example of the heat exchanger 1D. Figure 19(C) is a top view of the fifth modified example of the heat exchanger 1D.

[0097] As shown in Figures 19(A) and 19(C), an elastic sheet 70D may be placed between the claw portions 31 arranged in the X direction. In that case, the bottom portion 233 of the lower member 23L is preferably placed on the elastic sheet 70D, as shown in Figure 19(B). In this case, as shown in Figure 19(A), it is desirable that the claw portions 31 do not come into contact with the support plate 60, and that there be a gap between the -Z end of the claw portion 31 and the support plate 60.

[0098] (Sixth and seventh modified versions of heat exchanger 1D) Alternatively, only the claw portion that does not bend and extends straight in the -Z direction may be placed on the elastic sheet 70D.

[0099] Figure 20(A) is a front view of a sixth modified example of the heat exchanger 1D according to Embodiment 4. Figure 20(B) is a right side view of the sixth modified example of the heat exchanger 1D. Figure 20(C) is a top view of the sixth modified example of the heat exchanger 1D.

[0100] As shown in Figures 20(A)-20(C), the upper member 23U may include the claw portion 31 described in Embodiment 4 and a claw portion 34 that is longer than the claw portion 32 described in Embodiment 4 and extends straight in the -Z direction. In this case, since the claw portion 34 protrudes more from the -Z side than the claw portion 31, it is preferable that only the claw portion 34 is placed on the elastic sheet 70D.

[0101] Furthermore, Figure 21(A) is a front view of the seventh modified example of the heat exchanger 1D according to Embodiment 4. Figure 21(B) is a right side view of the seventh modified example of the heat exchanger 1D. Figure 21(C) is a top view of the seventh modified example of the heat exchanger 1D.

[0102] As shown in Figures 21(A)-21(C), the upper member 23U may have a longer claw portion 34 than the claw portion 32 described in Embodiment 4, and may be provided only with a claw portion 34 that extends straight in the -Z direction. In this case, since the claw portion 34 protrudes -Z further than the bottom portion 233 of the lower member 23L, it is preferable that the claw portion 34 rests on the elastic sheet 70D.

[0103] (Embodiment 5) In the heat exchanger 1D according to Embodiment 4, the upper member 23U, which covers the entire lower member 23L, is provided with claws 31 and 32. However, in the case where the upper member 23U is fitted into the groove 234 of the lower member 23L, the lower member 23L may also be provided with claws 31 and 32.

[0104] In the heat exchanger 1E according to Embodiment 5, the lower member 24L of the header 20E is provided with a claw portion 35 for fixing the upper member 24U. The heat exchanger 1E according to Embodiment 5 will be described below with reference to Figures 22(A) to 22(C). Embodiment 5 will be described mainly for its configuration which differs from Embodiments 1-4.

[0105] Figure 22(A) is a front view of the heat exchanger 1E according to Embodiment 5. Figure 22(B) is a right side view of the heat exchanger 1E. Figure 22(C) is a top view of the heat exchanger 1E.

[0106] As shown in Figure 22(B), in the header 20E, the bottom portion 243 of the lower member 24L is longer in the Y direction than the top portion 247 of the upper member 24U, and as a result, the groove 244 of the lower member 24L is larger in the Y direction. Consequently, similar to Embodiment 3, the upper member 24U is fitted into the groove 244 of the lower member 24L. Also, as a result of the upper member 24U being fitted into the groove 244 of the lower member 24L, the side wall portions 245 and 246 of the upper member 24U are in contact with the inner wall surfaces of the side wall portions 241 and 242 of the lower member 24L. The claw portion 35 is provided at the +Z ends of the side wall portions 241 and 242 of the lower member 24L in this configuration.

[0107] As shown in Figures 22(A)-22(C), the claw portion 35 has a shape in which a rectangular prism extends in the +Z direction. In Figures 22(A)-22(C), although not clearly visible for the sake of simplification, the claw portion 35 extends in the +Z direction along the side walls 245 and 246 of the upper member 24U, then bends and follows the top surface 247. The claw portion 35 is brazed to the side walls 245 and 246 and the top surface 247. In this way, the claw portion 35 fixes the upper member 24U to the lower member 24L.

[0108] Even with the header 20E, the bottom 243 of the lower member 24L may warp or dent, causing it to wobble when placed on the support plate 60. Therefore, an elastic sheet 70E is provided between the bottom 243 of the lower member 24L and the support plate 60. With the header 20E, the bottom 243 of the lower member 24L is supported by the elastic sheet 70E, preventing wobbling and reducing the transmission of impact from the support plate 60.

[0109] The claw portion 35 provided on the side wall portion 241 of the lower member 24L is an example of the third claw portion as described in this disclosure. The claw portion 35 provided on the side wall portion 242 of the lower member 24L is an example of the fourth claw portion as described in this disclosure.

[0110] As described above, in the heat exchanger 1E according to Embodiment 5, the bottom portion 243 of the lower member 24L is supported by the elastic sheet 70E. Therefore, the header 20E is less prone to rattling, even when the lower member 24L is joined to the upper member 24U by the claw portion 35 of the side wall portion 241. In addition, impacts are less likely to be transmitted to the header 20E.

[0111] (Embodiment 6) In the heat exchanger 1A-1E according to Embodiment 1-5, one header 10 is connected to one header 20A-20E. However, the heat exchanger 1A-1E is not limited to this. In the heat exchanger 1A-1E, the headers 10 and 20A-20E only need to have heat transfer tubes 40 connected to them and for refrigerant to flow between them and the heat transfer tubes 40. Therefore, the number and shape of the headers 10 and 20A-20E are arbitrary as long as this condition is met.

[0112] In the heat exchanger 1F according to Embodiment 6, two headers 20A, as described in Embodiment 1, are connected to a single header 10 by multiple heat transfer tubes 40. The heat exchanger 1F according to Embodiment 6 will be described below with reference to Figures 23(A) to 23(C). Embodiment 6 will be described mainly for its configuration which differs from Embodiments 1-5.

[0113] Figure 23(A) is a front view of the heat exchanger 1F according to Embodiment 6. Figure 23(B) is a right side view of the heat exchanger 1F. Figure 23(C) is a top view of the heat exchanger 1F.

[0114] As shown in Figures 23(A)-23(C), the heat exchanger 1F comprises a header 10 positioned on top, two headers 20A positioned below the header 10 and facing the header 10, and a plurality of elastic sheets 70F positioned on a support plate 60 and supporting the two headers 20A.

[0115] Header 10 is wider than the header 10 described in Embodiments 1-5. That is, in Embodiment 6, the width of header 10 in the Y direction is wider than that of header 10 described in Embodiments 1-5. On the other hand, in the heat exchanger 1F, as shown in Figure 23(C), heat transfer tubes 40, each extending in the Z direction, are arranged in the X direction to form a row. Furthermore, two rows of heat transfer tubes 40 are formed in the Y direction. The upper ends of the heat transfer tubes 40 arranged in these two rows are connected to header 10.

[0116] In contrast, each of the two headers 20A has the same configuration as the header 20A described in Embodiment 1. And, as in Embodiment 1, each header 20A has its cylindrical axis oriented in the X direction. Furthermore, unlike in Embodiment 1, each header 20A has its cylindrical axis parallel to each other and is positioned apart in the Y direction. The Y-direction pitch between the headers 20A is the same as the Y-direction pitch of the rows of heat transfer tubes. The lower ends of the heat transfer tubes 40 that form the respective rows are connected to each header 20A. As a result, the refrigerant can flow from one header 20A to the other, that is, from the +Y side header 20A to the -Y side header 20A, via the heat transfer tubes 40 and header 10. As a result, the heat exchanger 1F has higher heat exchange performance than the heat exchanger 1A according to Embodiment 1. Below the two headers 20A, a plurality of elastic sheets 70F are provided to prevent the headers 20A from rattling on the support plate 60. Specifically, four elastic sheets 70F are provided.

[0117] Each elastic sheet 70F is made of the same material as the elastic sheet 70A described in Embodiment 1. Each elastic sheet 70F is formed in a rectangular shape that is longer and narrower than elastic sheet 70A, and they have the same thickness. Each elastic sheet 70F has its longitudinal direction oriented in the Y direction. Furthermore, each elastic sheet 70F is arranged in the X direction. As a result, the multiple elastic sheets 70F together support the two headers 20A and prevent rattling of the headers 20A.

[0118] In Figures 23(A)-23(C), four elastic sheets 70F are provided. The elastic sheets 70F supporting the +X and -X ends of the header 20A are wider, while the two elastic sheets 70F supporting the center in the X direction are narrower. Elastic sheets 70F of this width should be arranged at intervals that ensure an even load distribution on the header 20A. Alternatively, the elastic sheets 70F may have the same width in the X direction and be arranged at equal intervals.

[0119] Furthermore, one of the two headers 20A is for carrying a gaseous refrigerant and is an example of the first header as referred to in this disclosure. The other of the two headers 20A is for carrying a liquid or gaseous liquid refrigerant and is an example of the second header as referred to in this disclosure.

[0120] (Heat exchanger 1F, first modified example) In the heat exchanger 1F according to Embodiment 6, the thickness of each elastic sheet 70F is the same, but the thickness of each elastic sheet 70F may differ in some parts.

[0121] Figure 24(A) is a front view of the first modified heat exchanger 1F. Figure 24(B) is a right side view of the first modified heat exchanger 1F. Figure 24(C) is a top view of the first modified heat exchanger 1F.

[0122] As shown in Figures 24(A)-24(C), among the multiple elastic sheets 70F, an elastic sheet 73F thinner than the elastic sheet 70F may be placed between some of the elastic sheets 70A. More specifically, an elastic sheet 73F thinner than the elastic sheet 70F and with a gap between it and the header 20A may be placed between the elastic sheets 70F that support the +X end and -X end of the header 20A, respectively. The elastic sheet 73F may then come into contact with the header 20A and absorb the impact on the header 20A when a downward impact is applied to the heat exchanger 1F, such as during an earthquake or vibration during transport.

[0123] Furthermore, the thickness of the elastic sheet 73F should be thinner than the elastic sheet 70F when the header 20A is placed on it and compressed by the header 20A. This allows the elastic sheet 73F to come into contact with the header 20A and absorb the impact on the header 20A only when a downward impact is applied to the heat exchanger 1F.

[0124] (Second and third modified versions of heat exchanger 1F) The heat exchanger 1F according to Embodiment 6 is equipped with two headers 20A as described in Embodiment 1. However, the heat exchanger 1F is not limited to this.

[0125] Figure 25(A) is a front view of the second modified heat exchanger 1F. Figure 25(B) is a right side view of the second modified heat exchanger 1F. Figure 25(C) is a top view of the second modified heat exchanger 1F.

[0126] As shown in Figures 25(A)-25(C), the heat exchanger 1F may have two headers 20B as described in Embodiment 2 instead of two headers 20A. Even in this configuration, the refrigerant can be circulated and heat exchange can be performed in the same way as when there are two headers 20A. In this configuration as well, it is preferable for the heat exchanger 1F to be equipped with an elastic sheet 70F. This allows the heat exchanger 1F to absorb the impact applied to the headers 20B and prevent rattling of the headers 20B.

[0127] Figure 26(A) is a front view of the third modified heat exchanger 1F. Figure 26(B) is a right side view of the third modified heat exchanger 1F. Figure 26(C) is a top view of the third modified heat exchanger 1F.

[0128] Furthermore, as shown in Figures 26(A)-26(C), the heat exchanger 1F may have two headers 20D, as described in the first modification of Embodiment 4, instead of the two headers 20A. In this case, the elastic sheet 70F may support both ends and two locations in the center of the header 20A in the extending direction, i.e., the +X end, the -X end, and the two locations in the center in the X direction. The width in the X direction of the elastic sheet 70F supporting the two locations in the center of the header 20A may be smaller than the width of the elastic sheet 70F supporting the +X end and -X end of the header 20A.

[0129] The header 20D shown in Figures 26(A)-26(C) includes a claw portion 31, but it may also include a claw portion 32 in addition to the claw portion 31. In other words, this header 20D may be replaced with the header 20D having claw portions 31 and 32 as described in Embodiment 4. In that case, the claw portion 32 may be bent in the same way as the claw portion 31.

[0130] (Fourth and fifth modified versions of heat exchanger 1F) Furthermore, in the third modified example of the heat exchanger 1F, it is sufficient that one or more elastic sheets 70F are provided, and it is not limited to a configuration in which only four elastic sheets 70F are provided.

[0131] Figure 27(A) is a front view of the fourth modified heat exchanger 1F. Figure 27(B) is a right side view of the fourth modified heat exchanger 1F. Figure 27(C) is a top view of the fourth modified heat exchanger 1F.

[0132] As shown in Figures 27(A)-27(C), the elastic sheet 70F may support the +X and -X ends of the header 20A.

[0133] Figure 28(A) is a front view of the fifth modified heat exchanger 1F. Figure 28(B) is a right side view of the fifth modified heat exchanger 1F. Figure 28(C) is a top view of the fifth modified heat exchanger 1F.

[0134] As shown in Figures 28(A)-28(C), the heat exchanger 1F may be equipped with an elastic sheet 73F that is thinner than the elastic sheet 70F, in addition to the elastic sheet 70F. In short, the heat exchanger 1F may use the elastic sheet 73F described in the first modified example of the heat exchanger 1F. More specifically, as described in the first modified example of the heat exchanger 1F, in the heat exchanger 1F, an elastic sheet 73F that is thinner than the elastic sheet 70F and has a gap between it and the header 20A may be placed between the elastic sheets 70F that support the +X end and -X end of the header 20D, respectively.

[0135] The above describes the heat exchanger 1A-1 according to the embodiment of the present disclosure. F As explained above, heat exchanger 1A-1 F is This is not limited to this.

[0136] For example, in Embodiment 1-6, the support plate 60 is a rectangular plate. However, the support plate 60 is not limited to being a plate. The support plate 60 can be any member on which the header is placed and which supports the header, i.e., a support member. For example, the support plate 60 may be replaced with a box that is open at the top and capable of accumulating condensed water. Alternatively, the support plate 60 may be replaced with the casing of the outdoor unit of an air conditioner.

[0137] Furthermore, in Embodiments 1-6, the elastic sheets 70A-70F are rectangular in shape; however, the elastic sheets 70A-70F are not limited to this. The elastic sheets 70A-70F are placed between the headers 20A-20E and the support plate 60, i.e., the support members, and are elastically deformed by the weight of the headers 20A-20E, as well as elastically deformed in response to impacts applied to the headers 20A-20E or the support members. The shape of the elastic sheets 70A-70E is arbitrary as long as this condition is met. For example, the elastic sheets 70A-70E may be similar in shape to the plan view shape of the headers 20A-20E, for example, in the shape of a strip. Alternatively, the elastic sheets 70A-70E may be oval, polygonal, or other shapes.

[0138] The thickness of the elastic sheets 70A-70E is arbitrary, as long as the above conditions are met. Similarly, the number of sheets is also arbitrary, as long as the above conditions are met.

[0139] As described above, heat exchanger 1A-1 F is The embodiments described above are not limited to those described above, and various modifications and substitutions can be made. Various forms of this disclosure are described below as appendices.

[0140] (Note 1) A heat transfer tube is connected to at least one header through which a refrigerant flows between the heat transfer tube and the header, The header is mounted on a support member that supports the header, An elastic sheet is placed between the header and the support member, and is elastically deformed by the weight of the header, and also elastically deforms in response to an impact applied to the header or the support member. A heat exchanger equipped with [the following features]. (Note 2) The heat transfer tube is oriented in a vertical direction. The header is cylindrical, with its axis oriented horizontally. The heat exchanger described in Appendix 1. (Note 3) The at least one header comprises a first header for carrying a gaseous refrigerant and a second header for carrying a liquid or gas-liquid refrigerant. The heat exchanger described in Appendix 1 or 2. (Note 4) The aforementioned header is, A lower member comprising a first side wall portion, a second side wall portion facing the first side wall portion, and a bottom portion connecting the lower end of the first side wall portion and the lower end of the second side wall portion, wherein the first side wall portion, the second side wall portion and the bottom portion form an open internal space at the top, The heat transfer tube is connected to the upper member that covers the internal space, Having A heat exchanger as described in any one of the notes 1 to 3. (Note 5) The aforementioned upper member is, A first upper surface portion that covers the first side wall portion and the second side wall portion from above, A third side wall portion extends downward from the end of the first upper portion that is on the side of the first side wall portion and is in contact with the outer wall surface of the first side wall portion, A fourth side wall portion extends downward from the end of the first upper portion that is on the side of the second side wall portion and is in contact with the outer wall surface of the second side wall portion, It has, The lower end of the third side wall, the lower end of the fourth side wall, and at least one of the bottom portion are placed on the elastic sheet. The heat exchanger described in Appendix 4. (Note 6) The third side wall portion extends in a direction perpendicular to the direction in which the first side wall portion and the second side wall portion face each other and in the vertical direction, and has a plurality of first claw portions at its lower end, each of which extends downward from the lower end of the third side wall portion and is arranged in the vertical direction. The fourth side wall portion extends in a direction perpendicular to the direction in which the first side wall portion and the second side wall portion face each other and in the vertical direction, and has a plurality of second claw portions at its lower end, each of which extends downward from the lower end of the fourth side wall portion and is arranged in the vertical direction. The heat exchanger described in Appendix 5. (Note 7) At least one of the plurality of first claw portions follows the first side wall portion and then bends along the bottom portion. At least one of the plurality of second claw portions follows the second side wall portion and then bends to follow the bottom portion. The heat exchanger described in Appendix 6. (Note 8) At least one of the plurality of first claw portions has a shape that extends downward from the first side wall portion, At least one of the plurality of second claw portions has a shape that extends downward from the first side wall portion. The heat exchanger described in Appendix 6. (Note 9) The lower end portions of the plurality of first claws are placed on the elastic sheet, The lower end portions of the plurality of second claws are placed on the elastic sheet. The heat exchanger described in Appendix 7 or 8. (Note 10) The bottom portion is placed on top of the elastic sheet, The plurality of first claw portions are not placed on the elastic sheet, and there is a space between the lower end portion and the support member. The plurality of second claw portions are not placed on the elastic sheet, and there is a space between the lower end portion and the support member. The heat exchanger described in Appendix 7 or 8. (Note 11) A portion of the plurality of first claw portions is placed on the elastic sheet, The remaining of the plurality of first claw portions are not placed on the elastic sheet and have a space between their lower end portion and the support member. Some of the aforementioned multiple second claw portions are placed on the elastic sheet, The remaining of the plurality of second claw portions are not placed on the elastic sheet and have a space between their lower end portion and the support member. The heat exchanger described in Appendix 7 or 8. (Note 12) The aforementioned upper member is, A fifth side wall portion that is in contact with the inner wall surface of the first side wall portion, The sixth side wall portion is in contact with the inner wall surface of the second side wall portion, A second upper surface portion connecting the upper end of the fifth side wall portion and the upper end of the sixth side wall portion, It has, The bottom portion is placed on top of the elastic sheet. A heat exchanger as described in any one of the appendices 4 through 11. (Note 13) The first side wall portion extends in a direction perpendicular to the direction opposite to the second side wall portion and in the vertical direction, and has a plurality of third claw portions at its upper end, each of the plurality of third claw portions extending upward from the upper end of the first side wall portion and arranged in the vertical direction. The second side wall extends in the vertical direction and has a plurality of fourth claws at its upper end, each of which extends upward from the upper end of the second side wall and is arranged in the vertical direction. The heat exchanger described in Appendix 12. (Note 14) At least one of the plurality of third claw portions bends along the fifth side wall portion and then along the second upper surface portion. At least one of the plurality of fourth claw portions follows the sixth side wall portion and then bends to follow the second upper surface portion. The heat exchanger described in Appendix 13. (Note 15) The header is either a circular or rectangular tube. A heat exchanger as described in any one of the appendices 1 through 14. (Note 16) The process includes placing an elastic sheet, which is elastically deformable in response to an impact applied to the header or the support member, between a header to which heat transfer tubes are connected and a refrigerant flows between the header and the support member, thereby causing the elastic sheet to be elastically deformed by the weight of the header, and supporting the header with the support member. A method for manufacturing a heat exchanger.

[0141] This disclosure allows for various embodiments and modifications without departing from the broad spirit and scope of this disclosure. Furthermore, the embodiments described above are for illustrative purposes only and do not limit the scope of this disclosure. In other words, the scope of this disclosure is indicated by the claims, not by the embodiments. Various modifications made within the scope of the claims and the equivalent significance of the disclosure are considered to be within the scope of this disclosure.

[0142] This application is based on Japanese Patent Application No. 2023-60444, filed on 3 April 2023. The entire specification, claims, and drawings of Japanese Patent Application No. 2023-60444 are incorporated herein by reference. [Explanation of Symbols]

[0143] 1A-1F Heat Exchanger, 10, 20A-20E Header, 21U, 22U, 23U, 24U Upper Side Part, 21L, 22L, 23L, 24L Lower Side Part, 31-35 Claw Part, 40 Transmission Heat Pipe, 50 Fin, 60 Support Plate, 70A, 70B, 70C, 70D, 70E, 70F, 71A, 71B, 71C, 71D, 72A, 72B, 72C, 73A, 73D, 73F Elastic Sheet, 211, 212 Side Wall Part, 213 Bottom, 214 Groove, 215, 216 Side Wall Part, 217 Upper Part, 221, 222 Side Wall Part, 223 Bottom, 224 225, 226 Sidewalls, 227 Upper surface, 231, 232 Sidewalls, 233 Bottom, 234 Groove, 235, 236 Sidewalls, 237 Upper surface, 241, 242 Sidewalls, 243 Bottom, 244 Groove, 245, 246 Sidewalls, 247 Upper surface, P1-P3 portions.

Claims

1. A heat transfer tube is connected to at least one header through which a refrigerant flows between the heat transfer tube and the header, A first cushioning material is placed between the header and the support member that supports the header, and is elastically deformed by the weight of the header, and also elastically deforms in response to an impact applied to the header or the support member. A second cushioning material is disposed between the header and the support member, and has a gap between it and the header. A heat exchanger equipped with [the following features].

2. The second cushioning material absorbs the impact by coming into contact with the header when an impact is applied to the header or the support member. The heat exchanger according to claim 1.

3. The thickness of the second buffer material in the direction of extension of the heat transfer tube is different from the thickness of the first buffer material in the direction of extension of the heat transfer tube. The heat exchanger according to claim 1.

4. The thickness of the second cushioning material is smaller than the thickness of the first cushioning material. The heat exchanger according to claim 3.

5. The extension direction of the heat transfer tube is oriented vertically, The header has a claw portion that protrudes below the bottom, The lower end portion of the claw is placed on the first cushioning material. The heat exchanger according to claim 1.

6. The direction in which the heat transfer tube extends is oriented vertically, The header has a claw portion that protrudes below the bottom, The claw portion is not placed on the first cushioning material, and has a space between its lower end portion and the support member. The heat exchanger according to claim 1.

7. The claw portion is provided in multiple locations on the header and arranged horizontally. The heat exchanger according to claim 5 or 6.

8. The heat transfer tube is oriented in a vertical direction. The header is cylindrical, with its axis oriented horizontally. A heat exchanger according to any one of claims 1 to 6.

9. The at least one header comprises a first header for carrying a gaseous refrigerant and a second header for carrying a liquid or gas-liquid refrigerant. A heat exchanger according to any one of claims 1 to 6.

10. The aforementioned header is, A lower member comprising a first side wall portion, a second side wall portion facing the first side wall portion, and a bottom portion connecting the lower end of the first side wall portion and the lower end of the second side wall portion, wherein the first side wall portion, the second side wall portion and the bottom portion form an open internal space at the top, The heat transfer tube is connected to the upper member that covers the internal space, Having The heat exchanger according to claim 8.

11. The aforementioned upper member is, A first upper surface portion that covers the first side wall portion and the second side wall portion from above, A third side wall portion extends downward from the end of the first upper portion that is on the side of the first side wall portion and is in contact with the outer wall surface of the first side wall portion, A fourth side wall portion extends downward from the end of the first upper portion that is on the side of the second side wall portion and is in contact with the outer wall surface of the second side wall portion, It has, The lower end of the third side wall, the lower end of the fourth side wall, and at least one of the bottom portion are placed on the first cushioning material. The heat exchanger according to claim 10.

12. The third side wall portion extends in a direction perpendicular to the direction in which the first side wall portion and the second side wall portion face each other and in the vertical direction, and has a plurality of first claw portions at its lower end, each of which extends downward from the lower end of the third side wall portion and is arranged in the vertical direction. The fourth side wall portion extends in a direction perpendicular to the direction in which the first side wall portion and the second side wall portion face each other and in the vertical direction, and has a plurality of second claw portions at its lower end, each of which extends downward from the lower end of the fourth side wall portion and is arranged in the vertical direction. The heat exchanger according to claim 11.

13. At least one of the plurality of first claw portions follows the first side wall portion, then bends and follows the bottom portion. At least one of the plurality of second claw portions follows the second side wall portion and then bends to follow the bottom portion. The heat exchanger according to claim 12.

14. At least one of the plurality of first claw portions has a shape that extends downward from the first side wall portion, At least one of the plurality of second claw portions has a shape that extends downward from the second side wall portion. The heat exchanger according to claim 12.

15. The aforementioned upper member is, A fifth side wall portion that is in contact with the inner wall surface of the first side wall portion, The sixth side wall portion is in contact with the inner wall surface of the second side wall portion, A second upper surface portion connecting the upper end of the fifth side wall portion and the upper end of the sixth side wall portion, It has, The bottom portion is placed on top of the first cushioning material. The heat exchanger according to claim 10.

16. The first side wall portion extends in a direction perpendicular to the direction opposite to the second side wall portion and in the vertical direction, and has a plurality of third claw portions at its upper end, each of the plurality of third claw portions extending upward from the upper end of the first side wall portion and arranged in the vertical direction. The second side wall extends in the vertical direction and has a plurality of fourth claws at its upper end, each of which extends upward from the upper end of the second side wall and is arranged in the vertical direction. The heat exchanger according to claim 15.

17. At least one of the plurality of third claw portions bends along the fifth side wall portion and then bends along the second upper surface portion. At least one of the plurality of fourth claw portions follows the sixth side wall portion and then bends to follow the second upper surface portion. The heat exchanger according to claim 16.

18. The header is either a circular or rectangular tube. A heat exchanger according to any one of claims 1 to 6.

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