air conditioner

Abstract

The present invention provides an air conditioner that can prevent electrical component failure by suppressing the dripping of condensed water from the surface of connecting pipes onto the electrical component box. [Solution] The air conditioner 100 comprises a connecting gas pipe 30b (connecting pipe) connected to a heat transfer tube 8, and an electrical component box 6. The connecting gas pipe 30b has a first portion P1 made of aluminum or an aluminum alloy with one end connected to the heat transfer tube 8, a second portion P2 made of copper or a copper alloy, a connecting portion Cp connecting the other end of the first portion P1 and one end of the second portion P2, and a bent portion 31 partially formed at least at one location along the extension of the connecting gas pipe 30b. The bent portion 31 is formed to the left of the electrical component box 6 when viewed from the front of the installed indoor unit 102, and the electrical component box 6 is not located on the tangent 27 below the bent portion 31.

Description

Technical Field

[0001] The present invention relates to an air conditioner.

Background Art

[0002] Conventionally, an air conditioner including a heat exchanger using an aluminum pipe as a connection pipe through which a refrigerant flows is known (see, for example, Patent Document 1). In such an air conditioner, in order to improve workability during installation, copper pipes that are more easily bent and deformed than the aluminum pipes are connected to ends of the aluminum pipes extending from the refrigerant inlet and the refrigerant outlet of the heat exchanger.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, a conventional air conditioner in which the connection pipe is composed of an aluminum pipe and a copper pipe (see, for example, Patent Document 1) is more likely to generate refrigerant noise during operation than an air conditioner in which the connection pipe is composed of only a copper pipe. Accordingly, it is conceivable to maintain the linearity of the routed pipes as much as possible in consideration of the pressure loss of the refrigerant flowing through the connection pipes, or to cover the connection pipes with a sound insulating material. However, for a connection pipe that is routed with linearity considered or whose diameter is enlarged by the covered sound insulating material, the distance between the connection pipe and a member around the connection pipe becomes small. On the other hand, condensed water adheres to the surface of the connection pipe through which a low-temperature refrigerant flows particularly during operation. Condensed water dripping from the connection pipe adjacent to the peripheral member may fall onto the peripheral member. When the peripheral member is an electrical component box (electrical component), the condensed water dripping from the pipe surface leads to failure of the electrical component, and further to failure of the air conditioner.

[0005] The object of the present invention is to provide an air conditioner that can prevent electrical component failure by suppressing the dripping of condensed water from the surface of connecting pipes onto the electrical component box. [Means for solving the problem]

[0006] The present invention, which solves the above problems, comprises a heat transfer tube made of aluminum or an aluminum alloy, a connecting pipe connected to the heat transfer tube, and an electrical component box, wherein the connecting pipe has a first part made of aluminum or an aluminum alloy with one end connected to the heat transfer tube, a second part made of copper or a copper alloy, a connecting portion that connects the other end of the first part and one end of the second part directly or via a connecting member, and a bent portion that is partially formed at least at one place along the extension of the connecting pipe, wherein the bent portion has an extreme value in the front-rear direction of the installed air conditioner, is formed at a position that overlaps with the electrical component box in the left-right direction of the installed air conditioner, and the tangent to the extreme value as viewed from the front of the installed air conditioner It is tilted so that it moves away from the electrical component box as it moves downward in the direction of gravity. .

[0007] Furthermore, the air conditioner of the present invention, which solves the above problems, comprises a heat transfer tube made of aluminum or an aluminum alloy, a connecting pipe connected to the heat transfer tube, and an electrical component box, wherein the connecting pipe has a first part made of aluminum or an aluminum alloy with one end connected to the heat transfer tube, a second part made of copper or a copper alloy, a connecting part that connects the other end of the first part and one end of the second part directly or via a connecting member, and a bent part that is partially formed at least at one location along the extension of the connecting pipe, wherein the bent part has an extreme value in the left-right direction of the installed air conditioner, is formed in a position that overlaps with the electrical component box in the front-rear direction of the installed air conditioner, and the electrical component box is not located on a tangent line of the extreme value that is downward in the direction of gravity from the extreme value when viewed from the side of the installed air conditioner. [Effects of the Invention]

[0008] According to the air conditioner of the present invention, it is possible to suppress the dripping of condensed water from the surface of the connecting pipes onto the electrical component box, thereby preventing malfunctions of electrical components. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram illustrating the configuration of an air conditioner according to an embodiment of the present invention. [Figure 2] This is a partially enlarged perspective view showing the internal structure of the indoor unit that constitutes an air conditioner according to an embodiment of the present invention. [Figure 3] Figure 2 is a partially enlarged front view showing the connecting piping (connecting gas piping) when the indoor unit is viewed from the front. [Figure 4] This is a partially enlarged side view showing the connecting piping (connecting gas piping) as seen from the direction indicated by arrow IV in Figure 3. [Figure 5] This is a partially enlarged side view of a connecting pipe (connecting gas pipe) which is a comparative example of the present invention. [Figure 6] This is a partially enlarged side view of an air conditioner, which is a first modified example of the present invention. [Figure 7] This is a partially enlarged side view of the connecting piping (connecting gas piping) in an air conditioner, which is a second modified example of the present invention. [Modes for carrying out the invention]

[0010] The embodiments for implementing the air conditioner of the present invention will be described in detail below, with reference to the drawings as appropriate. This embodiment mainly describes a wall-mounted indoor unit to which the present invention is applied, but the present invention is not limited thereto and can also be applied to other indoor units such as floor-standing and ceiling-mounted units, as well as outdoor units of air conditioners. The following section will first explain the overall configuration of the air conditioner, and then provide a more detailed explanation of the indoor unit.

[0011] <Air conditioner> Figure 1 is an explanatory diagram illustrating the configuration of an air conditioner 100 according to an embodiment of the present invention. In the following explanation, the up, down, front, and back directions are based on the directions indicated by the arrows in Figure 1, when viewing the indoor unit 102 (see Figure 1) installed on a designated wall 104 (see Figure 1) from the front. Regarding the left and right directions, although not shown in the illustration, the front of Figure 1 is the right side, and the back of Figure 1 is the left side.

[0012] As shown in Figure 1, the air conditioner 100 comprises an outdoor unit 101 and an indoor unit 102. The outdoor unit 101, installed outdoors, performs heat exchange between the refrigerant and the outdoor air. The indoor unit 102, installed on the indoor wall 104, performs heat exchange between the refrigerant and the indoor air.

[0013] During cooling operation, the air conditioner 100 draws liquid refrigerant (including gaseous two-phase refrigerant) from the outdoor unit 101 via liquid piping 20 to flow through the heat transfer tubes 8 of the indoor heat exchanger 3 in the indoor unit 102. At this time, the indoor heat exchanger 3 functions as an evaporator, cooling the surrounding air. The low-temperature gaseous refrigerant vaporized in the heat transfer tubes 8 of the indoor heat exchanger 3 is then sent to the outdoor unit 101 via gas piping 30. The gaseous refrigerant sent to the outdoor unit 101 becomes liquid refrigerant (including gaseous two-phase refrigerant) via the outdoor heat exchanger, which functions as a compressor and condenser (not shown) in the outdoor unit 101. This liquid refrigerant is then sent back to the indoor unit 102 via liquid piping 20.

[0014] In this embodiment, the indoor heat exchanger 3 comprises multiple fins 7 stacked at predetermined intervals and heat transfer tubes 8. This indoor heat exchanger 3 is a fin-tube type heat exchanger having heat transfer tubes 8 in which multiple tubes that penetrate the multiple fins 7 in the stacking direction are connected so as to serpentine by folding back at a substantially U-shaped return bend. Furthermore, the indoor heat exchanger 3 is an all-aluminum heat exchanger in which the fins 7 and heat transfer tubes 8 are formed of aluminum or an aluminum alloy.

[0015] The indoor heat exchanger 3 in the present embodiment is formed in a substantially U-shape in cross-sectional view so as to cover the front surface portion and the upper surface portion of the cross-flow fan 2 which is a blower. Then, the indoor air that the driven cross-flow fan 2 draws into the casing 1 from the suction port 4 formed in the upper part of the casing 1 passes through the indoor heat exchanger 3 and is blown out into the room from the blowout port 5 formed in the front part of the casing 1. At this time, the indoor air is cooled by the indoor heat exchanger 3 during the cooling operation. The indoor unit 102 blows out such conditioned air from the blowout port 5.

[0016] In this air conditioner 100, the liquid pipe 20 connecting the outdoor unit 101 and the indoor unit 102 includes an extended liquid pipe 20a extending from the outdoor unit 101 side via the flare nut connection portion 11, and a connection liquid pipe 20b further extending from the distal end portion of the extended liquid pipe 20a to the indoor unit 102 side via the flare nut connection portion 11. Further, the gas pipe 30 includes an extended gas pipe 30a extending from the outdoor unit 101 side via the flare nut connection portion 11, and a connection gas pipe 30b further extending from the distal end portion of the extended gas pipe 30a to the indoor unit 102 side via the flare nut connection portion 11. The connection gas pipe 30b corresponds to the "connection pipe". These connection liquid pipe 20b and connection gas pipe 30b (connection pipes) are drawn into the room through the hole 105 formed in the wall 104.

[0017] <Indoor Unit> Next, the indoor unit will be described in more detail. Figure 2 is a partially enlarged perspective view showing the internal structure of the indoor unit 102 shown in Figure 1. In addition, in Figure 2, reference numeral 6 denotes an electrical component box indicated by a virtual line (two-dot chain line). The electrical component box 6 in the present embodiment is arranged adjacent to the right end portion in the longitudinal direction (left-right direction) of the indoor heat exchanger 3 (see Figure 1) and the cross-flow fan 2 (see Figure 1). The electrical component box 6 consists of a substantially rectangular parallelepiped electrical component case made of sheet metal, and accommodates electrical components and the like constituting the control unit.

[0018] In Figure 2, reference numeral 3 denotes the indoor heat exchanger. Reference numeral 3c denotes a return bend section in which multiple heat transfer tubes 8 (see Figure 1) are folded back and meander. Reference numeral 30b denotes the connecting gas piping (connecting piping) extending from the outdoor unit 101 (see Figure 1). Reference numeral 20b denotes the connecting liquid piping extending from the outdoor unit 101 (see Figure 1). For ease of drawing, the connecting gas piping 30b (connecting piping), which is located downstream of the indoor heat exchanger 3 as an evaporator and through which low-temperature gaseous refrigerant flows, is shaded.

[0019] As shown in Figure 2, the connecting gas pipe 30b (connecting pipe) is connected to the refrigerant outlet 3a of the indoor heat exchanger 3 during cooling operation. The connecting liquid pipe 20b is connected to the refrigerant inlet 3b of the indoor heat exchanger 3 during cooling operation. In this embodiment, the refrigerant inlet 3b and refrigerant outlet 3a are located on the right side of the indoor heat exchanger 3. That is, in this embodiment, the connecting liquid piping 20b and connecting gas piping 30b (connecting piping) are located on the left side of the electrical components box 6.

[0020] The connecting gas piping 30b (connecting piping) within the indoor unit 102 is configured to include a first portion P1 extending from the refrigerant outlet 3a and a second portion P2 connected to the end of the first portion P1 via a connecting member C. Specifically, the first part P1 has one end connected to the heat transfer tube 8 (see Figure 1) and the other end connected to the connecting member C. The second part P2 has one end connected to the connecting member C and the other end extends to the outside of the indoor unit 102 (see Figure 1) and is connected to the flare nut connection part 11.

[0021] As shown in Figure 2, in this embodiment, the first part P1 extends to the right from the refrigerant outlet 3a during the cooling operation of the indoor heat exchanger 3, and then bends in a U-shape at its tip where the direction of extension changes to the front. This U-shaped bend 31 is curved so as to be convex forward and form a vertical arc. That is, the chord portion 26 of the arc (see Figure 4), which will be described later, extends in the vertical direction (up and down direction) of this bend 31. This bend 31 will be described in detail later.

[0022] Furthermore, within the indoor unit 102, the second part P2 extends rearward from the connecting member C, which is the connection point Cp with the first part P1, then changes direction of extension upward, bends in a U-shape at its tip, and extends downward. The second part P2 is then routed to the outside of the indoor unit 102.

[0023] The first part P1 constituting the connecting gas pipe 30b (connecting pipe) is made of aluminum or an aluminum alloy. The second part P2 constituting the connecting gas pipe 30b (connecting pipe) is made of copper or a copper alloy. The connecting member C is made of a pipe body into which the first part P1 and the second part P2 are fitted. In this embodiment, the connecting member C is assumed to be made of copper, a copper alloy, stainless steel, etc., but is not limited to these. However, in the connecting gas pipe 30b (connecting pipe), the connecting member C can be omitted and the first part P1 and the second part P2 can be directly connected by eutectic bonding. In this embodiment, the connecting liquid piping 20b can consist of an aluminum or aluminum alloy pipe 22a extending from the refrigerant inlet 3b of the indoor heat exchanger 3, and a copper or copper alloy pipe 22c connected to the end of the pipe 22a via a connecting member 22b.

[0024] Next, the bent portion 31 (see Figure 2) in the connecting gas pipe 30b (see Figure 2), which serves as the connecting pipe in this embodiment, will be described. Figure 3 is a partially enlarged front view showing the connecting gas piping 30b (connecting piping) when viewed from the front of the indoor unit 102 in Figure 2. In Figure 3, reference numeral 3 denotes the indoor heat exchanger, and reference numeral 6 denotes the electrical component box. Reference numeral C denotes a connecting member that forms the connection part Cp between the first part P1 and the second part P2. Figure 4 is a partially enlarged side view showing the connecting gas piping 30b (connecting piping) when viewed from the direction indicated by arrow IV in Figure 3. In Figure 4, reference numeral C denotes a connecting member that forms the connection part Cp between the first part P1 and the second part P2.

[0025] As shown in Figure 3, the bent portion 31 in this embodiment is formed in the first portion P1 of the connecting gas pipe 30b (connecting pipe), as described above. As shown in Figure 4, the bent portion 31 has an extreme value 37 on the front side of the indoor unit 102 (see Figure 3). Specifically, this bent portion 31 is formed in a position that overlaps with the electrical component box 6 in the left-right direction of the indoor unit 102 shown in Figure 3. Furthermore, in this embodiment, the tangent line 27 at the extreme value 37 of the bent portion 31 extends parallel to the extension line 25 of the chord portion 26 of the arc in the bent portion 31, as seen in the side view in Figure 4. The chord portion 26 is a line segment connecting the base end portion 32 of the bent portion 31 where the arc begins to bend and the end portion 33 of the bent portion 31 where the arc ends. Furthermore, in the forward view of the indoor unit 102 shown in Figure 3, the tangent line 27 and the extension line 25 overlap. Furthermore, in the forward view shown in Figure 3, the indoor unit 102 is configured such that the electrical component box 6 is not located on the tangent line 27 that extends vertically above the extreme value 37 in the direction of gravity, among the tangent lines 27 that extend vertically above the extreme value 37.

[0026] Returning to Figure 3, the tangent 27 of this bent portion 31 extends in the vertical direction. Specifically, the tangent 27 extends in the vertical direction within a range of 45 degrees to 135 degrees with respect to the horizontal plane, and as mentioned above, in the forward view of Figure 3, the electrical component box 6 is not located on the tangent 27 of the bent portion 31 that extends downward from the bent portion 31. Preferably, on the extension line 25, the distance L2 between the lower end 34 of the bent portion 31 and the electrical component box 6 is greater than or equal to the distance L1 between the upper end 35 of the bent portion 31 and the electrical component box 6 (L2 ≥ L1). Furthermore, as shown in Figure 4, it is desirable that the bending radius R at the bent portion 31 be 10 mm or more.

[0027] <Effects and Effects> Next, the effects and benefits of the air conditioner 100 according to this embodiment will be described. The air conditioner 100 according to this embodiment comprises a heat transfer tube 8 made of aluminum or an aluminum alloy, a connecting gas pipe 30b (connecting pipe) connected to the heat transfer tube 8, and an electrical component box 6. The connecting gas pipe 30b (connecting pipe) comprises a first part P1 made of aluminum or an aluminum alloy with one end connected to the heat transfer tube 8, a second part P2 made of copper or a copper alloy, and a connecting part Cp that connects the other end of the first part P1 and one end of the second part P2 directly or via a connecting member C. The connecting gas pipe 30b (connecting pipe) has a bend 31 that is partially formed at least once along its extension, and the bend 31 has an extreme value 37 in the front-rear direction of the installed indoor unit 102 (air conditioner), and is formed in a position that overlaps with the electrical component box 6 in the left-right direction of the installed indoor unit 102 (air conditioner), and the electrical component box 6 is not located on the tangent 27 of the extreme value 37 that is in the downward direction in the direction of gravity from the extreme value 37 when viewed from the front of the installed indoor unit 102 (air conditioner).

[0028] Figure 5 is a partially enlarged side view of the connecting gas pipe 30c, which is a comparative example of the present invention. As shown in Figure 5, the electrical component box 6 is located on the tangent line 27 (extension line 25) at the bend 31a of the connecting gas pipe 30c. In this comparative example, the condensed water W adhering to the bend 31a of the connecting gas pipe 30c is likely to drip onto the electrical component box 6. The condensed water W dripping from the pipe surface can lead to the failure of electrical components and, consequently, the failure of the air conditioner 100.

[0029] In contrast, with the air conditioner 100, the electrical component box 6 is not located on the tangent line 27 in the downward direction of gravity from the extreme value 37 of the bend 31 when viewed from the front of the indoor unit 102, thus suppressing the accumulation of condensed water on the electrical component box 6. This prevents electrical component failures.

[0030] Furthermore, in this air conditioner 100, it is preferable that the bending radius of the bent portion 31 is 10 mm or more. With such an air conditioner 100, the pressure loss of the refrigerant flowing through the bent section 31 can be reduced, and the refrigerant noise can be reduced.

[0031] Furthermore, in this air conditioner 100, it is preferable that the distance L2 between the lower end 34 of the bent portion 31 and the electrical component box 6 is greater than or equal to the distance L1 between the upper end 35 of the bent portion 31 and the electrical component box 6. With such an air conditioner 100, in addition to limiting the inclination angle of the extension line 25 of the vertically extending bent portion 31 as described above, it is possible to guide the condensed water to drip away from the electrical component box 6 side.

[0032] Furthermore, in this air conditioner 100, the connection part Cp can be configured to be connected by eutectic bonding. Generally, in copper-aluminum eutectic jointed pipes, the overlapping of copper and aluminum pipes necessitates a longer straight section near the joint. This tends to increase the area over which the connecting pipes need to be routed, resulting in a shorter distance between the connecting pipes and the electrical component box. Consequently, condensed water dripping from the surface of the connecting pipes is more likely to fall onto the electrical component box. In contrast, in this embodiment, the air conditioner 100 does not have an electrical component box 6 located on the tangent 27 (extension line 25) of the bend 31, so it is possible to route the piping in a way that makes it difficult for condensed water to fall onto the electrical component box 6.

[0033] Furthermore, in this air conditioner 100, the connecting gas piping 30b (connecting piping) is provided in the indoor unit 102. Generally, indoor units have greater space constraints for surrounding components such as electrical component boxes located around the connecting pipes than outdoor units. Therefore, the distance between the connecting pipes and the electrical component boxes tends to be shorter. This makes it easier for condensed water dripping from the surface of the connecting pipes to fall onto the electrical component boxes. In contrast, in this embodiment, the air conditioner 100 does not have an electrical component box 6 located on the tangent 27 (extension line 25) of the bend 31, so it is possible to route the piping in a way that makes it difficult for condensed water to fall onto the electrical component box 6.

[0034] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above and can be implemented in various forms. In the above embodiment, an air conditioner 100 having an indoor unit 102 in which the bent portion 31 is formed on the left side with respect to the electrical component box 6 was described. However, the present invention is not limited thereto, and the present invention can also be configured to have an indoor unit 102 in which the bent portion 31 is formed on the right side with respect to the electrical component box 6. Even in such an air conditioner 100, by configuring it so that the electrical component box 6 is not located on the tangent line 27 (extension line 25) of the bend 31, it becomes possible to route the piping in a way that makes it less likely for condensed water to fall onto the electrical component box 6.

[0035] Figure 6 is a partially enlarged side view of an air conditioner 100, which is a first modified example of the present invention. In this first modified example, the same reference numerals are used for components that are the same as those in the previous embodiment, and their detailed descriptions are omitted. As shown in Figure 6, the first modified example, the air conditioner 100, has an indoor unit 102 in which the bent portion 31 is formed on the front side relative to the electrical component box 6. Even in such an air conditioner 100, by configuring it so that the electrical component box 6 is not located on the tangent line 27 (extension line 25) of the bend 31, it becomes possible to route the piping in a way that makes it less likely for condensed water to fall onto the electrical component box 6. Furthermore, the air conditioner 100 can also be configured to have an indoor unit 102 in which the bent portion 31 is formed on the rear side relative to the electrical component box 6, unlike the air conditioner 100 shown in Figure 6. Even in such an air conditioner 100, by configuring it so that the electrical component box 6 is not located on the tangent line 27 (extension line 25) of the bend 31, it becomes possible to route the piping in a way that makes it less likely for condensed water to fall onto the electrical component box 6.

[0036] Figure 7 is a partially enlarged side view of the connecting gas piping 30b (connecting piping) in an air conditioner 100, which is a second modified example of the present invention. In this second modified example, the same reference numerals are used for components that are the same as in the previous embodiment, and their detailed descriptions are omitted. As shown in Figure 7, at least a portion of the bent portion 31 in the connecting gas piping 30b (connecting piping) of the air conditioner 100, which is a second modified example, is covered with a covering member 36. This covering member 36 has the function of a sound-absorbing material, sound-insulating material, sound-absorbing material, and sound-blocking material against refrigerant noise that is likely to occur at the bent portion 31.

[0037] Furthermore, the connecting gas pipe 30b (connecting pipe) covered by the covering member 36 tends to move closer to the electrical component box when its diameter is increased. However, in the second modified air conditioner 100, the electrical component box 6 is not located on the tangent 27 (extension line 25) of the bend 31, so it is possible to route the piping in a way that makes it less likely for condensed water to fall onto the electrical component box 6.

[0038] Furthermore, as shown in Figure 7, the covering member 36 in the second modified air conditioner 100 is provided on the bent portion 31 formed in the first portion P1. Generally, aluminum pipes used in connecting piping have a smaller inner diameter than copper pipes of the same outer diameter. Furthermore, aluminum pipes have a lower surface density than copper pipes. Therefore, aluminum pipes are more prone to generating refrigerant noise than copper pipes when refrigerant flows through them. Therefore, in the second modified air conditioner 100, the first part P1 made of aluminum or an aluminum alloy is prone to generating refrigerant noise, and the bent portion 31 of the first part P1 is even more prone to generating refrigerant noise. According to the second modified air conditioner 100, the covering member 36 is provided on the bent portion 31 formed in the first part P1, thereby effectively reducing the refrigerant noise generated.

[0039] In the above embodiments, as well as the first and second modified examples, it is assumed that only the first portion P1 has one bent portion 31. However, the present invention is not limited thereto, and a configuration having multiple bent portions 31 is also possible. Furthermore, the bent portion 31 can also be provided in the second portion P2 inside the indoor unit 102. [Explanation of symbols]

[0040] 6. Electrical parts box 8 Heat transfer tubes 25 Extension line 27 tangent 30b Connecting gas piping (connecting piping) 31 Bending section 34 Lower end 35 Upper end 36 Covering member 37 Extreme Values 100 Air conditioners 102 Indoor unit P1 first part P2 second part C connecting member CP connection R (bending radius)

Claims

1. A heat transfer tube made of aluminum or an aluminum alloy, A connecting pipe connected to the heat transfer tube, Equipped with an electrical components box, The aforementioned connecting pipe is A first part formed of aluminum or an aluminum alloy and one end connected to the heat transfer tube, A second part formed of copper or a copper alloy, A connecting portion that connects the other end of the first portion and one end of the second portion directly or via a connecting member, A bend is formed at least at one point along the extension of the connecting pipe, It has, The aforementioned bent portion has an extreme value in the front-to-back direction of the installed air conditioner, is formed in a position that overlaps with the electrical component box in the left-to-right direction of the installed air conditioner, and the tangent to the extreme value as viewed from the front of the installed air conditioner is inclined to move away from the electrical component box as it moves downward in the direction of gravity.

2. A heat transfer tube made of aluminum or an aluminum alloy, A connecting pipe connected to the heat transfer tube, Equipped with an electrical components box, The aforementioned connecting pipe is A first part formed of aluminum or an aluminum alloy and one end connected to the heat transfer tube, A second part formed of copper or a copper alloy, A connecting portion that connects the other end of the first portion and one end of the second portion directly or via a connecting member, A bend is formed at least at one point along the extension of the connecting pipe, It has, The bent portion has an extreme value in the left-right direction of the air conditioner to be installed, is formed in a position that overlaps with the electrical component box in the front-rear direction of the air conditioner to be installed, and the electrical component box is not located on a tangent line of the extreme value that is downward in the direction of gravity from the extreme value when viewed from the side of the air conditioner to be installed.

3. The air conditioner according to claim 1 or claim 2, wherein at least a portion of the bent portion is covered with a covering member.

4. The air conditioner according to claim 3, wherein the covering member is provided on the bent portion formed in the first part.

5. The air conditioner according to claim 1 or claim 2, wherein the bending radius of the bent portion is 10 mm or more.

6. The air conditioner according to claim 1 or claim 2, wherein the distance between the lower end of the bent portion and the electrical component box is greater than or equal to the distance between the upper end of the bent portion and the electrical component box.

7. The air conditioner according to claim 1 or claim 2, wherein the aforementioned connecting pipe is provided in the indoor unit.

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