JP2013137122A - Outdoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress electric corrosion in a header collecting pipe even if frosting and defrosting are repeated, relating to an outdoor unit equipped with the header collecting pipe, a plurality of heat transfer pipes connected to the header collecting pipe, and a heat exchanger made of aluminum or aluminum alloy.SOLUTION: A contact preventing member 40 includes a bottom surface holding part 47 which is interposed between an upper surface of a bottom plate 50 and a bottom surface of a header collecting pipe 11 to hold the bottom surface at a position higher than the upper surface, and a side surface covering part 44 which is raised from the bottom surface holding part 47 and interposed between the side plate 51 and an outer surface of the header collecting pipe 11 facing the side of the side plate 51 so as to cover at least a part of the side surface. A lower end of the contact preventing member 40 has a shape opening a part of side portion.

Description

  The present invention relates to an outdoor unit of an air conditioner.

  In recent years, there has been a demand for weight reduction of outdoor units, and it has been proposed to form a heat exchanger from aluminum or an aluminum alloy as a countermeasure. However, in general, a housing including a bottom plate and side plates constituting a housing of an outdoor unit is made of a metal (for example, a steel plate) different from aluminum. Therefore, in a heat exchanger made of aluminum or an aluminum alloy, dissimilar metal contact corrosion There is concern that (electric corrosion) will occur.

  Patent Document 1 discloses an outdoor unit in which the bottom plate is made of a steel plate and the header pipe is made of a material other than iron such as aluminum. In this outdoor unit, in order to prevent electrolytic corrosion of the header pipe, the lower end of the header pipe is disclosed. A technique has been proposed in which a cylindrical electrolytic corrosion prevention body is interposed between a cylindrical recess provided on the bottom plate.

JP 2011-145029 A

  However, in the outdoor unit of Patent Document 1, since the electrolytic corrosion prevention body has a cylindrical shape, the condensed water generated in the header pipe flows down through the header pipe, and the electrolytic corrosion prevention body and the header pipe May accumulate in the gap. When the condensed water accumulated in the gaps freezes in this way, the electrolytic corrosion prevention body may be damaged due to the volume expansion. When the electrolytic corrosion preventing body is damaged, the function of preventing the electrolytic corrosion of the header pipe is impaired, and there is a possibility that electrolytic corrosion occurs in the header pipe.

  Therefore, the present invention has been made in view of such a point, and includes a header collecting pipe and a plurality of heat transfer tubes connected to the header collecting pipe, and includes a heat exchanger made of aluminum or an aluminum alloy. In the outdoor unit, the object is to suppress electrolytic corrosion in the header collecting pipe even when frosting and defrosting are repeated.

  The outdoor unit of the present invention includes a housing (20) including a bottom plate (50) and a side plate (51) standing up from the bottom plate (50), and aluminum or aluminum alloy which is a metal different from the housing (20). A header collecting pipe (11) and a plurality of heat transfer pipes (12) connected to the header collecting pipe (11), insulated from a heat exchanger (10) disposed on the bottom plate (50) And a contact preventing member (40) for preventing contact between the header collecting pipe (11), the bottom plate (50) and the side plate (51). The contact preventing member (40) is interposed between the upper surface of the bottom plate (50) and the bottom surface of the header collecting pipe (11), and holds the bottom surface at a position higher than the upper surface (47). ) And the outer surface of the header collecting pipe (11) standing up from the bottom surface holding portion (47) and facing the side plate (51) and the side plate (51). And a side surface covering portion (44) that covers the portion. The lower end part of the said contact prevention member (40) has a shape which a part of side opened.

  In this configuration, since the header collecting pipe (11) as described above is provided with the contact preventing member (40) for preventing the header collecting pipe (11) from contacting the bottom plate (50) and the side plate (51), the header collecting pipe (11 ) Can be prevented from causing electric corrosion.

  Moreover, in this configuration, the lower end portion of the contact prevention member (40) has a shape in which a part of the side is opened. That is, in this configuration, the lower end portion of the contact preventing member (40) is not in a cylindrical closed form like the electrolytic corrosion preventing body of Patent Document 1, but a part of the side is opened. Therefore, the water that has flowed down through the header collecting pipe (11) can be drained from the opening, and the contact prevention member (40) and the lower end of the header collecting pipe (11) are not drained. Even when the water remaining in the gap is frozen again due to the influence of outside air, the contact prevention member (40) is dewed because a part of the side at the lower end of the contact prevention member (40) is open. It becomes easy to deform following the volume expansion of water, and the force applied to the contact preventing member (40) due to the volume expansion can be reduced as compared with the conventional case. Thereby, since it can suppress that a contact prevention member (40) breaks, the electrolytic corrosion in a header collecting pipe (11) can be suppressed.

  Further, in this configuration, the bottom surface holding portion (47) holds the bottom surface of the header collecting pipe (11) at a position higher than the top surface of the bottom plate (50). Therefore, it becomes difficult for the header collecting pipe (11) to come into contact with water such as drain water (condensation water).

  The said outdoor unit WHEREIN: The lower end part of the said contact prevention member (40) can illustrate the form with which at least one part of area | regions other than the area | region facing the said side plate (51) is opening. Furthermore, it is preferable that the lower end portion of the contact preventing member (40) is closed without opening a region facing the side plate (51). Thereby, it is possible to suppress the dew condensation water flowing through the header collecting pipe (11) and flowing down to the lower end portion of the header collecting pipe (11) from flowing to the side plate (51), so that the header collecting pipe (11) and the side plate (51 ) Can be prevented from interposing water.

  In the outdoor unit, it is preferable that the side surface covering portion (44) is provided up to a position covering the outer surface of the header collecting pipe (11) facing in a direction in which the heat transfer pipe (12) extends.

  In this configuration, since the area of the outer surface of the header collecting pipe (11) covered with the side surface covering portion (44) can be increased, for example, salt damage caused by salt contained in the outside air taken into the housing (20) Therefore, the header collecting pipe 11 can be prevented from corroding.

  In the outdoor unit, the header collecting pipe (11) has a long shape in a direction rising from the bottom plate (50), and the contact prevention member (40) is arranged in a longitudinal direction of the header collecting pipe (11). The plurality of heat transfer tubes (12) extend along the longitudinal direction of the header collecting tube (11) with a gap (G) formed between adjacent heat transfer tubes (12). It is preferable that the side surface covering portion (44) has comb teeth (46) inserted into the gap (G).

  In this configuration, since the comb teeth (46) are inserted into the gap (G) between the adjacent heat transfer tubes, the contact prevention member (40) is restricted from moving up and down with respect to the header collecting tube (11). Is done. Accordingly, the contact preventing member (40) is less likely to be displaced with respect to the header collecting pipe (11), and therefore the contact preventing effect on the side plate (51) and the bottom plate (50) of the header collecting pipe (11) is further enhanced. Can do.

  In the outdoor unit, each of the plurality of heat transfer tubes (12) has a flat shape, and the thickness direction of the heat transfer tubes (12) faces the longitudinal direction of the header collecting tube (11), and the comb teeth (46) preferably extends along the width direction of the heat transfer tube (12).

  In this configuration, since the comb teeth (46) extend along the width direction of the flat heat transfer tube, the effect of restricting the movement of the contact prevention member with respect to the header collecting tube (11) is further enhanced.

  In the outdoor unit, the comb teeth (46) preferably have a shape whose tip is narrower than a base end.

  In this configuration, since the tip of the comb tooth (46) is thinner than the base end, it becomes easy to insert the comb tooth (46) into the gap (G) between the adjacent heat transfer tubes, and workability in the manufacturing process of the outdoor unit. Will improve.

  According to the present invention, in an outdoor unit having a header collecting pipe and a plurality of heat transfer pipes connected to the header collecting pipe and including a heat exchanger made of aluminum or an aluminum alloy, frosting and defrosting are performed. Even if it is repeated, electrolytic corrosion in the header collecting pipe can be suppressed.

In the outdoor unit which concerns on one Embodiment of this invention, it is a schematic top view for demonstrating the positional relationship of a heat exchanger and a structural component. It is the perspective view which showed the internal structure of the said outdoor unit, and looked at the said outdoor unit from the right front. It is an expansion perspective view which shows the header collection tube and heat exchanger tube of the said heat exchanger, and a 1st contact prevention member and a 2nd contact prevention member. It is the rear view which expanded a part of said heat exchanger. (A) is a front view which shows a 1st contact prevention member, (B) is a right view which shows a 1st contact prevention member, (C) is a rear view which shows a 1st contact prevention member. And (D) is a left side view showing the first contact prevention member. (A) is a front view which shows a 2nd contact prevention member, (B) is a right view which shows a 2nd contact prevention member, (C) is a rear view which shows a 2nd contact prevention member. (D) is a left side view showing the second contact preventing member. (A), (B) is a top view for demonstrating the positional relationship of a header collecting pipe, an attachment member, a 1st contact prevention member, and a 2nd contact prevention member, (C), (D) Is a bottom view thereof. It is the schematic which shows the state by which the 1st contact prevention member and the 2nd contact prevention member were fixed to structural components with the attachment member and the fixing member. It is the right view which expanded the lower end part of the 1st contact prevention member and the 2nd contact prevention member. (A) is a top view which shows an attachment member, (B) is a right view which shows an attachment member, (C) is a rear view which shows an attachment member. (A) is a front view which shows a 3rd contact prevention member, (B) is a right view which shows a 3rd contact prevention member, (C) is a rear view which shows a 3rd contact prevention member. And (D) is a left side view showing the third contact preventing member. (A) is a top view for demonstrating the positional relationship of a header collecting pipe and a 3rd contact prevention member, (B) is the bottom view, (C) is the right view. is there. (A) is the schematic which shows the modification 1 of the said contact prevention member, (B) is the schematic which shows the modification 2 of the said contact prevention member.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view for explaining the positional relationship of components arranged in the casing 20 in the outdoor unit 1 according to the present embodiment, and the illustration of the top plate of the casing 20 is omitted. Yes. FIG. 2 shows the internal structure of the outdoor unit 1, and is a perspective view of the outdoor unit 1 as viewed from the right front. Further, in FIG. 3, illustration of a plurality of fins 13 to be described later is omitted, and the details of the fins 13 in other drawings are omitted, and only the entire outer shape is illustrated. Moreover, in FIG. 3, the state which partially fractured | ruptured the contact prevention member 40 mentioned later is shown for description.

<Overall structure of outdoor unit>
As shown in FIG.1 and FIG.2, the outdoor unit 1 which concerns on this embodiment is the heat exchanger 10, the air blower 60, the compressor 62, the partition plate 70, the contact prevention member 40, the air blower 60, and compression. A control panel (not shown) including a control unit for controlling the machine 62 and the like, and a housing 20 for housing them are provided.

  The housing 20 includes a bottom plate 50, a side plate 51, and a top plate, and has a rectangular parallelepiped shape. The side plate 51 includes a front side plate 52, a rear side plate 53, a right side plate 54, and a left side plate 55. The partition plate 70 partitions the air blowing chamber in which the blower 60 is arranged from the machine room in which the compressor 62 and the control panel are arranged. The side plate 51 and the partition plate 70 are structural parts fixed to the bottom plate 50 in a posture standing from the bottom plate 50. The housing | casing 20 and the partition plate 70 consist of a metal different from the header collecting pipe 11 mentioned later, and are formed, for example with the steel plate.

  The casing 20 has an intake port that takes in air from the outside toward the heat exchanger 10 side, and an exhaust port 21c that exhausts air to the outside. The intake port includes a rear side intake port 21a and a side surface side intake port 21b. The rear side air inlet 21 a is provided in the rear side plate 53. The side air inlet 21 b is provided on the left side plate 55. For example, as each intake port 21a, 21b, what consists of a some slit and a grid | lattice-like opening are mentioned. The exhaust port 21 c is provided in the front side plate 52. When the blower 60 is operated, outside air is taken into the housing 20 through the back side air inlet 21a and the side air inlet 21b, and is heat exchanged with the refrigerant in the heat exchanger 10, and then the air through the air outlet 21c. 20 is discharged outside.

<Heat exchanger>
The heat exchanger 10 includes a pair of header collecting tubes 11, a plurality of heat transfer tubes 12 connected to the header collecting tubes 11, and a plurality of fins 13 provided in each heat transfer tube 12. The heat exchanger 10 is disposed on the bottom plate 50. The pair of header collecting tubes 11, the plurality of heat transfer tubes 12, and the plurality of fins 13 are made of aluminum or an aluminum alloy.

  The pair of header collecting pipes 11 includes a first header collecting pipe 11 a located at one end of the heat exchanger 10 and a second header collecting pipe 11 b located at the other end of the heat exchanger 10. Each header collecting pipe has a long shape in a direction (vertical direction) rising from the bottom plate 50. The pair of header collecting pipes 11a and 11b are placed on the bottom plate 50 via a bottom surface holding portion 47 of the contact preventing member 40 described later. Each header collecting pipe is provided with a refrigerant pipe 14 through which the refrigerant flowing in the refrigerant circuit flows in or out.

  The first header collecting pipe 11a distributes the refrigerant flowing into the first header collecting pipe 11a into the plurality of heat transfer tubes 12 connected to the first header collecting pipe 11a. The distributed refrigerant is sent to the second header collecting pipe 11b side. The second header collecting pipe 11b collects the distributed refrigerant. Note that the flow direction of the refrigerant may be the reverse direction, that is, the direction from the second header collecting pipe 11b toward the first header collecting pipe 11a.

  As shown in FIG. 3, the plurality of heat transfer tubes 12 are arranged along the longitudinal direction of the header collecting tube 11 with a gap G formed between adjacent heat transfer tubes 12. That is, the plurality of heat transfer tubes 12 are arranged in the vertical direction. Each heat transfer tube 12 has one end connected to the first header collecting tube 11a and the other end connected to the second header collecting tube 11b, and the refrigerant flows through the inside thereof.

  Each heat transfer tube 12 has a flat shape in which the thickness, that is, the dimension in the arrangement direction is smaller than the dimension in the width direction. Each heat transfer tube 12 is substantially L-shaped when viewed from above, and has a long side portion located on the back side and extending along the rear side plate 53, a short side portion located on the side surface side, and a left side plate 55. Extending along.

  Each heat transfer tube 12 is provided with a plurality of fins 13 arranged along the longitudinal direction thereof. Each fin 13 has a thin plate shape. Outside air is supplied to the long side portion of each heat transfer tube 12 and the fins 13 provided in this portion through the back side air inlet 21a. Outside air is supplied to the short side portion of each heat transfer tube 12 and the fins 13 provided in this portion through the side air inlet 21b.

  As shown in FIG. 4, each heat transfer tube 12 has an exposed portion 12a whose surface is exposed between the first header collecting tube 11a and the fin 13 provided at a position closest to the first header collecting tube 11a. Have Similarly, each heat transfer tube 12 has an unillustrated exposed portion whose surface is exposed between the second header collecting tube 11b and the fin 13 provided at a position closest to the second header collecting tube 11b. . The surface area of each exposed portion 12a is larger than the surface area of each exposed portion between adjacent fins 13 in each heat transfer tube 12.

<Contact prevention member>
The contact preventing member 40 is for preventing contact between the header collecting pipe 11 and the structural parts 51 and 70. In the present embodiment, the contact preventing member 40 is provided between the intake port and the header collecting pipe 11 and is taken in from the intake port as a fixing member that fixes the header collecting pipe 11 to the bottom plate 50. It further has a function as a shielding member that blocks the airflow from reaching the header collecting pipe 11. The contact preventing member 40 is an insulating member made of an insulating material. Examples of the insulating material include synthetic resins such as polypropylene and polyethylene.

  The contact prevention member 40 includes a first contact prevention member 41, a second contact prevention member 42, and a third contact prevention member 43. The first contact prevention member 41 is interposed between the first header collecting pipe 11a and the side plate 51 (rear side plate 53) to prevent them from contacting each other. The second contact prevention member 42 is interposed between the first header collecting pipe 11a and the partition plate 70 to prevent them from contacting each other. The third contact prevention member 43 is interposed between the second header collecting pipe 11b and the side plate 51 (left side plate 55) to prevent them from contacting each other.

  Each contact preventing member has a shape extending along the longitudinal direction (vertical direction) of the header collecting pipe 11. In the present embodiment, each contact prevention member is provided over the entire area in the longitudinal direction of the header collecting pipe 11 between the header collecting pipe 11 and the structural components 51 and 70, but is not limited thereto. Specifically, each contact prevention member covers the header collecting pipe in a state of covering at least a part of the outer peripheral surface of the header collecting pipe 11 in terms of a function of preventing contact between the header collecting pipe 11 and the structural parts 51 and 70. 11 and the structural parts 51, 70 only need to be interposed, and the length of each contact prevention member in the vertical direction may be shorter than that of the header collecting pipe 11.

  Each contact prevention member has a side surface covering portion 44, a positioning portion 45, and a bottom surface holding portion 47. The side surface covering portion 44 plays a role of covering at least a part of the outer peripheral surface of the header collecting tube 11, and the positioning portion 45 is arranged such that the side surface covering portion 44 is interposed between the header collecting tube 11 and the structural components 51 and 70. It plays a role of positioning the side surface covering portion 44. The bottom surface holding part 47 is interposed between the top surface of the bottom plate 50 and the bottom surface of the header collecting pipe 11 and plays a role of holding the bottom surface at a position higher than the top surface of the bottom plate 50. Hereinafter, each contact prevention member is demonstrated concretely.

(First contact prevention member and second contact prevention member)
FIGS. 5A to 5D are views showing the first contact prevention member 41, and FIGS. 6A to 6D are views showing the second contact prevention member 42. FIGS. 7A and 7B are plan views, and FIGS. 7C and 7D are bottom views. Among these, FIGS. 7A and 7C show a state before the header collecting pipe 11a, the mounting member 48, the first contact preventing member 41, and the second contact preventing member 42 are assembled. 7B and 7D show a state in which these are assembled. 8 is a schematic view showing a state in which the first contact prevention member 41 and the second contact prevention member 42 are fixed to the structural components 51 and 70 by the mounting member 48 and the fixing member 49.

  As shown in FIGS. 5, 7, and 8, the first contact prevention member 41 includes a first side surface covering portion 44 that covers an outer peripheral surface of the header collecting pipe 11 a facing the rear side plate 53, and a first side surface covering portion. A first positioning portion 45 for positioning the first side surface covering portion 44 so that 44 is interposed between the header collecting tube 11a and the rear plate 53, and a region on the rear plate 53 side and the bottom plate 50 on the bottom surface of the header collecting tube 11a. And a first bottom surface holding portion 471 interposed between the top surface and the top surface. The first side surface covering portion 44, the first positioning portion 45, and the first bottom surface holding portion 471 are integrally formed.

  The first side surface covering portion 44 of the first contact prevention member 41 has a first region 441 extending in the vertical direction substantially parallel to the rear side plate 53, and a direction intersecting the rear side plate 53 (in this embodiment, a direction orthogonal to the rear side plate 53). ) Extending in the second region 442.

  The first region 441 of the first side surface covering portion 44 is provided at a position facing the rear side plate 53 in the thickness direction. The first region 441 is provided in a region that covers the entire first header collecting pipe 11a when viewed from the direction orthogonal to the rear side plate 53. Thereby, the 1st contact prevention member 41 can block | prevent that the airflow taken in from the inlet 21a reaches | attains the 1st header collecting pipe 11a.

  In the first region 441, a plurality of reinforcing ribs are provided on the outer surface as shown in FIG. The plurality of ribs include a vertical rib 71 and a plurality of horizontal ribs 72. The vertical rib 71 extends from the upper end to the lower end of the first region 441. The plurality of horizontal ribs 72 are arranged at intervals in the vertical direction. Each lateral rib 72 extends to the outer surface of the first positioning portion 45 described later.

  The second region 442 of the first side surface covering portion 44 is located at a position adjacent to the first region 441 and extends in a belt shape from the upper end portion to the lower end portion of the first side surface covering portion 44, and a side edge of the connection portion. And a large number of comb teeth 46 extending in the horizontal direction. A large number of comb teeth 46 are arranged in the vertical direction at substantially equal intervals. Each comb tooth 46 extends along the circumferential direction of the first header collecting pipe 11 a and the direction away from the rear side plate 53, and is inserted into the gap G between the adjacent heat transfer pipes 12. Each comb tooth 46 extends along the width direction of the heat transfer tube 12. In the present embodiment, the comb teeth 46 are inserted into all the gaps G, but the present invention is not limited to this, and the comb teeth 46 may be inserted into a part of the plurality of gaps G.

  The length of each comb tooth 46 of the first contact prevention member 41 in the vertical direction is the same as the length of the corresponding gap G or slightly smaller than the length of the corresponding gap G. The length of each comb tooth 46 in the vertical direction can be inserted without resistance when inserted into the corresponding gap G, and as much area as possible on the outer peripheral surface of the first header collecting pipe 11a located in the gap G. It is preferably a dimension that can be covered. In the present embodiment, the first header set located in the gap G by inserting the comb teeth 46 of the first contact prevention member 41 and the comb teeth 46 of the second contact prevention member 42 described later into the corresponding gap G. Almost the entire outer peripheral surface of the tube 11a is covered.

  Each comb tooth 46 of the first contact prevention member 41 has a shape that is long in the circumferential direction of the first header collecting pipe 11a, and has a shape whose tip is narrower than the base end. Specifically, in each comb tooth 46, the thickness of the region on the connection portion side is larger than the thickness of the region on the tip side, and these regions are connected via a step. The step of each comb tooth 46 is provided on the inner surface. Thereby, the 1st contact prevention member 41 can be reduced in size, suppressing interference with the outer peripheral surface of the circular header collecting pipe 11a by planar view.

  The first bottom surface holding portion 471 extends in a plate shape in the horizontal direction from the lower end of the first side surface covering portion 44, and has a size that can cover the region on the rear plate 53 side on the bottom surface of the header collecting pipe 11a from below. Have. The bottom surface holding portion 47 includes the first bottom surface holding portion 471 and a second bottom surface holding portion 472 of the second contact prevention member 42 described later. The bottom surface holding part 47 may be fixed to the bottom plate 50, for example.

  As shown in FIGS. 6, 7, and 8, the second contact prevention member 42 includes a second side surface covering portion 44 that covers an outer peripheral surface facing the partition plate 70 side in the first header collecting pipe 11 a, and a second side surface. A second positioning portion 45 for positioning the second side surface covering portion 44 so that the covering portion 44 is interposed between the header collecting tube 11a and the partition plate 70, and a region on the partition plate 70 side on the bottom surface of the header collecting tube 11a. And a second bottom surface holding part 472 interposed between the bottom plate 50 and the top surface. The second side surface covering portion 44, the second positioning portion 45, and the second bottom surface holding portion 472 are integrally formed.

  The second side surface covering portion 44 of the second contact prevention member 42 has a first region 441 extending in the vertical direction substantially parallel to the end piece of the partition plate 70 and a direction intersecting with the end piece of the partition plate 70 (in this embodiment, the partition wall is a partition). 2nd area | region 442 extended in the direction orthogonal to the edge part of the board 70).

  The first region 441 of the second side surface covering portion 44 is provided at a position facing the partition plate 70 in the thickness direction. The first region 441 of the second side surface covering portion 44 is provided in a region that covers the entire first header collecting pipe 11a when viewed from a direction orthogonal to the end piece of the partition plate 70. As shown in FIG. 6C, the first region 441 is provided with a plurality of reinforcing ribs on the outer surface. The plurality of ribs include vertical ribs 71 and a plurality of horizontal ribs 72, similar to the first contact prevention member 41 described above.

  The second region 442 of the second side surface covering portion 44 is located at a position adjacent to the first region 441 and extends in a band shape from the upper end portion to the lower end portion of the first side surface covering portion 44, and a side edge of the connection portion. And a large number of comb teeth 46 extending in the horizontal direction. A large number of comb teeth 46 are arranged in the vertical direction at substantially equal intervals. Each comb tooth 46 extends along the circumferential direction of the first header collecting pipe 11 a and the direction away from the partition plate 70, and is inserted into the gap G between the adjacent heat transfer pipes 12.

  Further, the comb teeth 46 of the second contact prevention member 42 extend along the width direction of the heat transfer tube 12. The extending direction of each comb tooth 46 of the second contact preventing member 42 is opposite to the extending direction of each comb tooth 46 of the first contact preventing member 41, and the tip of each comb tooth 46 of the second contact preventing member 42 is The first contact preventing member 41 is provided at a position where it comes into contact with or close to the tip of the comb teeth 46. As a result, as shown in FIG. 3, the periphery of the heat transfer tube 12 is surrounded by the edges of the adjacent comb teeth 46 in the first contact prevention member 41 and the edges of the adjacent comb teeth 46 in the second contact prevention member 42. A surrounding hole is formed. By adopting a configuration in which the exposed portion 12a of the heat transfer tube 12 is surrounded by such a hole, the exposed portion 12a is prevented from corroding due to salt damage.

  In addition, since the structure of each comb tooth 46 of the 2nd contact prevention member 42, such as a dimension and thickness, is the same as that of the comb tooth 46 of the 1st contact prevention member 41 mentioned above, description is abbreviate | omitted.

  The second bottom surface holding portion 472 of the second contact prevention member 42 extends horizontally in a plate shape from the lower end of the second side surface covering portion 44, and the region on the partition plate 70 side on the bottom surface of the first header collecting pipe 11a. It has a size that can be covered from below.

  Next, each positioning part 45 of the 1st contact prevention member 41 and the 2nd contact prevention member 42 is demonstrated.

  The first positioning portion 45 of the first contact prevention member 41 is located on the opposite side of the plurality of heat transfer tubes 12 with respect to the first header collecting tube 11a. The plurality of fins 13, the large number of comb teeth 46, the first header collecting pipe 11 a, and the first positioning portion 45 are arranged along the rear plate 53 in this order in a plan view. The first positioning portion 45 includes a first main body portion 451 provided at a position continuous with the first region 441 of the first side surface covering portion 44, a plurality of first fastening portions 452, and a plurality of first fitting portions 453. Including.

  As shown in FIG. 8, the first main body 451 is provided at a position facing the rear plate 53 in the thickness direction. The first main body 451 extends in the vertical direction substantially parallel to the rear plate 53. In the present embodiment, the plurality of first fastening portions 452 are provided at two locations above and below the middle of the first main body portion 451 in the vertical direction. Each first fastening portion 452 has an insertion hole (through hole) 45a through which a fixing member 491 described later is inserted. The plurality of first fitting portions 453 are provided at three locations, that is, an upper end portion, a lower end portion, and an intermediate portion between the first main body portion 451.

  Similar to the first positioning portion 45, the second positioning portion 45 of the second contact preventing member 42 is located on the opposite side of the plurality of heat transfer tubes 12 with respect to the first header collecting tube 11a. The plurality of fins 13, a large number of comb teeth 46, the first header collecting pipe 11 a, and the second positioning portion 45 are arranged along the rear plate 53 in this order in a plan view. The second positioning portion 45 includes a second main body portion 454 provided at a position continuous with the first region 441 of the second side surface covering portion 44, a plurality of second fastening portions 455, and a plurality of second fitting portions 456. Including.

  The second main body 454 is provided at a position facing the end piece of the partition plate 70 in the thickness direction. The second main body 454 extends in the vertical direction substantially parallel to the partition plate 70. In the present embodiment, the plurality of second fastening portions 455 are provided at two locations above and below the middle of the second body portion 454 in the vertical direction. Each second fastening portion 455 has a plurality of insertion holes (through holes) 45b through which a fixing member 492 described later is inserted. The plurality of second fitting portions 456 are provided at three locations, that is, an upper end portion, a lower end portion of the second main body portion 454, and an intermediate portion therebetween.

  Each first fitting portion 453 of the first contact prevention member 41 has a fitting protrusion 453a extending to the second fitting portion 456 side of the second contact prevention member 42, and each second fitting portion 456 includes , A corresponding fitting protrusion 453a is inserted and locked to have a fitting hole 456a. The first contact prevention member 41 and the second contact prevention member 42 are connected to each other by fitting each of the plurality of first fitting portions 453 to the corresponding second fitting portion 456.

  By fitting the first fitting portion 453 and the second fitting portion 456 in a state where the first header collecting pipe 11a is covered with the first side face covering portion 44 and the second side face covering portion 44, the first The first contact prevention member 41 and the second contact prevention member 42 are fixed to the header collecting pipe 11a. Thereby, for example, even when the first header collecting pipe 11a slightly rolls, at least the relative positions of the first contact preventing member 41 and the second contact preventing member 42 with respect to the first header collecting pipe 11a change substantially. Therefore, the first header collecting pipe 11a can be prevented from coming into contact with the side plate 51.

  FIG. 9 is an enlarged right side view of the lower ends of the first contact prevention member 41 and the second contact prevention member 42. As shown in FIG. 9, the lower ends of the first contact prevention member 41 and the second contact prevention member 42 have a shape in which a part in the circumferential direction is opened. That is, the first contact prevention member 41 and the second contact prevention member 42 are not provided so as to surround the entire circumference of the first header collecting pipe 11a at their lower end portions, but only in a part of the circumferential direction. Is provided. In the present embodiment, the region opened at the lower end portion of the first contact prevention member 41 is a region A1 between the bottom surface holding portion 471 of the first contact prevention member 41 and a fitting portion 453 described later. The area | region opened in the lower end part of the 2 contact prevention member 42 is area | region A2 between the bottom face holding | maintenance part 472 of the 2nd contact prevention member 42, and the fitting part 456 mentioned later.

  That is, the lower end portion of the first contact prevention member 41 and the lower end portion of the second contact prevention member 42 are closed without opening the region facing the rear side plate 53, while a part of the side, specifically, The region A1 and the region A2 facing the right side plate 54 are opened. The region A1 and the region A2 are located on the opposite side to the heat transfer tube 12 (the opposite side to the comb teeth 46) with respect to the first header collecting tube 11a.

  As described above, since the contact preventing members 41 and 42 have the opening region at the lower end portion, the water flowing down through the first header collecting pipe 11a can be drained from the opening regions A1 and A2. Even when the water remaining in the gap between the contact preventing members 41 and 42 and the lower end of the first header collecting pipe 11a is frozen again due to the outside air without being drained, the contact is caused by the volume expansion. The force applied to the prevention member can be reduced. Thereby, since it can suppress that the contact prevention members 41 and 24 are damaged, even if it is a case where frost formation and a defrost are repeated, the electrolytic corrosion in the header collecting pipe 11a can be suppressed.

(Mounting member and fixing member)
Next, the attachment member 48 and the fixing member 49 will be described. As shown in FIG. 8, the first contact prevention member 41 and the second contact prevention member 42 are fixed to the rear side plate 53 and the partition plate 70 by a plurality of attachment members 48 and a plurality of fixing members 49. Each attachment member 48 includes a first function for fixing the first contact prevention member 41 to the side plate 51, a second function for fixing the second contact prevention member 42 to the partition plate 70, and the first contact prevention member 41. And a third function of coupling the second contact preventing member 42.

  As shown in FIGS. 10A to 10C, each attachment member 48 includes a first attachment portion 481, a second attachment portion 482, a connecting portion 483, and flange portions 484 and 485, which are It is integrally formed. The attachment member 48 has a substantially U shape in plan view. The first function described above is performed by the first mounting portion 481 of the mounting member 48, the second function is performed by the second mounting portion 482 of the mounting member 48, and the third function is the connecting portion of the mounting member 48. 483 is responsible. Hereinafter, the attachment member 48 will be specifically described.

  The first attachment portion 481 is a plate-like portion that is disposed along the inner surface of the first fastening portion 452 of the first positioning portion 45 and extends substantially parallel to the inner surface. The first attachment portion 481 is disposed on the opposite side of the rear plate 53 with respect to the first positioning portion 45 of the first contact prevention member 41. The second attachment portion 482 is a plate-like portion that is disposed along the inner surface of the second fastening portion 455 of the second positioning portion 45 and extends substantially parallel to the inner surface. The first attachment portion 481 has a screw hole 48a at a position corresponding to the insertion hole 45a of the corresponding first fastening portion 452.

  The second attachment portion 482 is a plate-like portion that is disposed along the inner surface of the second fastening portion 455 of the second positioning portion 45 and extends substantially parallel to the inner surface. The second attachment portion 482 is disposed on the opposite side of the partition plate 70 with respect to the second positioning portion 45 of the second contact prevention member 42. The connecting portion 483 connects the first attaching portion 481 and the second attaching portion 482, and is a plate-like portion extending in a direction substantially orthogonal to these. The second attachment portion 482 has a screw hole 48b at a position corresponding to the insertion hole 45b of the corresponding second fastening portion 455.

  The flange portion 484 is an end piece formed by being bent from the front end of the first mounting portion 481 toward the rear plate 53 side, and is disposed at a position facing the end edge of the first fastening portion 452 (see FIG. 8). ). The flange portion 485 is an end piece formed by being bent from the tip of the second mounting portion 482 toward the partition plate 70, and is disposed at a position facing the edge of the second fastening portion 455 (see FIG. 8). ).

  The plurality of fixing members 49 include a first fixing member 491 and a second fixing member 492. The first fixing member 491 includes an insertion hole (not shown) provided in the rear plate 53, an insertion hole 45a provided in the first fastening portion 452 of the first positioning portion 45, and a screw hole 48a in the first attachment portion 481. They are inserted in order and screwed into the screw holes 48a. Thereby, the first contact prevention member 41 is fixed to the rear side plate 53. Each second fixing member 492 includes an insertion hole (not shown) provided in the rear plate 53, an insertion hole 45b provided in the second fastening portion 455 of the second positioning portion 45, and a screw hole 48b in the second attachment portion 482. Are inserted in this order and screwed into the screw holes 48b. Thereby, the second contact preventing member 41 is fixed to the partition plate 70. Further, the bottom surface holding portion 47 may be fixed to the bottom plate 50, for example.

(Third contact prevention member)
Next, the third contact prevention member 43 will be specifically described with reference to FIGS. 11 (A) to 11 (D) and FIG.

  As shown in FIGS. 11A to 11D and FIG. 12, the third contact prevention member 43 includes a third side surface covering portion 44 that covers an outer peripheral surface facing the left side plate 55 side in the second header collecting pipe 11 b. The third positioning portion 45 for positioning the third side surface covering portion 44 so that the third side surface covering portion 44 is interposed between the second header collecting tube 11b and the left side plate 55, and the second header collecting tube 11b. A third bottom surface holding portion 47 interposed between the bottom surface and the top surface of the bottom plate 50 is provided. The third side surface covering portion 44, the third positioning portion 45, and the third bottom surface holding portion 47 are integrally formed.

  The third side surface covering portion 44 includes a first region 441 extending in the vertical direction substantially parallel to the left side plate 55 and a second region 442 extending in a direction intersecting with the left side plate 55 (a direction orthogonal to the left side plate 55 in the present embodiment). Including.

  The first region 441 is provided at a position facing the left side plate 55 in the thickness direction. The first region 441 is provided in a region that covers the entire second header collecting pipe 11b when viewed from a direction orthogonal to the left side plate 55. Thereby, the 3rd contact prevention member 43 can block | interrupting the airflow taken in from the inlet port 21b reaching | attaining the 2nd header collecting pipe 11b. In the first region 441, a plurality of reinforcing ribs are provided on the outer surface as shown in FIG. The plurality of ribs include a vertical rib 71 and a plurality of horizontal ribs 72. The vertical rib 71 extends from the upper end to the lower end of the first region 441. The plurality of horizontal ribs 72 are arranged at intervals in the vertical direction.

  The second region 442 is located adjacent to the first region 441 and extends in a strip shape from the upper end portion to the lower end portion of the first side surface covering portion 44, and a plurality of horizontal portions extending from the side edges of the connection portion in the horizontal direction. Comb teeth 46. A large number of comb teeth 46 are arranged in the vertical direction at substantially equal intervals. Each comb tooth 46 extends in the circumferential direction of the second header collecting pipe 11 b and in the direction away from the left side plate 55, and is inserted into the gap G between the adjacent heat transfer pipes 12. Each comb tooth 46 extends along the width direction of the heat transfer tube 12. In the present embodiment, the comb teeth 46 are inserted into all the gaps G, but the present invention is not limited to this, and the comb teeth 46 may be inserted into a part of the plurality of gaps G.

  In the present embodiment, the lower end portion of the third contact prevention member 43 is closed without opening a region facing the left side plate 55, while facing a part of the side, specifically, the front side plate 52. And the region facing the right side plate 54 is open. In the present embodiment, the third covering portion (side surface covering portion) 44 includes a first region 441 facing the left side plate 55 side and a second region 442 facing the rear side plate 53 side. It is not provided on the right side plate 54 side. That is, the second header collecting pipe 11b is configured such that the outer peripheral surface facing the left side plate 55 and the outer peripheral surface facing the rear side plate 53 are covered by the third side surface covering portion 44, while the outer periphery facing the front side plate 52 side. The outer peripheral surface facing the surface and the right side plate 54 side is not covered with the third side surface covering portion 44.

  Since the outer peripheral surface facing the front side plate 52 and the outer peripheral surface of the second header collecting pipe 11b facing the right side plate 54 are not covered with the third side surface covering portion 44, the second header collecting pipe 11b flows down. The drained water can be drained from the opened portion (the portion not covered by the third side surface covering portion 44). Temporarily, the third contact preventing member 43 and the second header collecting pipe 11b are not drained. Even when the water remaining in the gap with the lower end is frozen again due to the influence of outside air, the force applied to the third contact prevention member 43 due to the volume expansion can be reduced. Thereby, since it can suppress that the 3rd contact prevention member 43 is damaged, even if it is a case where frost formation and defrost are repeated, the electrolytic corrosion in the header collecting pipe 11b can be suppressed.

  The length of each comb tooth 46 in the vertical direction is the same as the length of the corresponding gap G or slightly smaller than the length of the corresponding gap G. The length in the extending direction (horizontal direction) of each comb tooth 46 is a dimension that covers at least a part of the lower surface and the upper surface of the corresponding heat transfer tube 12, and preferably a dimension that covers the entire lower surface and the upper surface of the heat transfer tube 12. There should be. In the present embodiment, the plurality of comb teeth 46 are inserted into the corresponding gaps G, so that almost the entire outer peripheral surface of the second header collecting pipe 11b located in the gaps G is covered. In addition, since the structure of each comb tooth 46, such as thickness and a taper shape, is the same as that of the comb tooth 46 of the 1st contact prevention member 41 mentioned above, description is abbreviate | omitted.

  The third bottom surface holding portion 47 extends in a plate shape in the horizontal direction from the lower end of the side surface covering portion 44, and has a size capable of covering the bottom surface of the second header collecting pipe 11b from below.

  The third positioning portion 45 is located on the opposite side of the plurality of heat transfer tubes 12 with respect to the second header collecting tube 11b. The plurality of fins 13, the large number of comb teeth 46, the second header collecting pipe 11 b, and the third positioning portion 45 are arranged along the left side plate 55 in this order in plan view.

  The third positioning portion 45 includes a plurality of fastening portions 457 extending from the edge of the first region of the third side surface covering portion 44 in a direction along the left side plate 55, and a plurality of header sides attached to the second header collecting pipe 11b. A fastening portion 458 (see FIG. 2). Each header side fastening portion 458 is made of an insulating material.

  The some fastening part 457 is arrange | positioned at intervals at the up-down direction. Each fastening portion 457 has an insertion hole 457a through which an unillustrated fixing member such as a bolt is inserted. On the other hand, the plurality of header side fastening portions 458 are attached to the second header collecting pipe 11b so as to be positioned at the same height as the corresponding fastening portions 457. Each header-side fastening portion 458 has a belt-like portion wound around the second header collecting pipe 11b and an extending portion extending from the belt-like portion along the corresponding fastening portion 457. . Each extending portion is provided with an insertion hole through which the fixing member is inserted.

  The fixing member is inserted into the insertion hole 457a of the fastening portion 457 and the insertion hole of the header side fastening portion 458, and a nut is screwed into the end portion. Thereby, the third contact prevention member 43 is fixed to the second header collecting pipe 11b. The nut may be screwed in a state where the bolt inserted into the insertion hole 457a of the fastening portion 457 and the insertion hole of the header side fastening portion 458 is further inserted into the insertion hole provided in the left side plate 55. . In this case, the third contact prevention member 43 is fixed to the second header collecting pipe 11b and the left side plate 55, respectively.

  As described above, in this embodiment, since the header collecting pipe 11 is provided with the contact preventing member 40 for preventing the header collecting pipe 11 from coming into contact with the bottom plate 50 and the side plate 51, electrolytic corrosion occurs in the header collecting pipe 11. Can be suppressed. And in this embodiment, the lower end part of the contact prevention member 40 has a shape which a part of side (part of the circumferential direction) opened. Therefore, the water that has flowed down through the header collecting pipe 11 can be drained from the opening, and temporarily remains in the gap between the contact preventing member 40 and the lower end of the header collecting pipe 11 without being drained. Even when the water is frozen again due to the influence of outside air, the lower end portion of the contact prevention member 40 is open, so that the contact prevention member 40 easily deforms following the volume expansion of the water. As a result, the force applied to the contact preventing member 40 can be reduced as compared with the conventional case. Thereby, since it can suppress that the contact prevention member 40 is damaged, even if it is a case where frost formation and defrost are repeated, the electrolytic corrosion in the header collecting pipe 11 can be suppressed.

  In the present embodiment, the lower end portion of the contact prevention member 40 is partially open except for the region facing the side plate 51. The lower end portion of the contact preventing member 40 is closed without opening a region facing the side plate 51. As a result, it is possible to suppress the dew condensation water flowing down to the lower end portion of the header collecting pipe 11 through the header collecting pipe 11 from flowing to the side plate 51, so that water intervenes between the header collecting pipe 11 and the side plate 51. Can be suppressed.

  In the present embodiment, the bottom surface holding part 47 holds the bottom surface of the header collecting pipe 11 at a position higher than the top surface of the bottom plate 50. Therefore, for example, compared with the form fitted into the recess of the bottom plate as in the electric corrosion prevention body of Patent Document 1, water such as drain water is less likely to contact the header collecting pipe 11.

  Further, in the present embodiment, the side surface covering portion 44 is provided up to a position that covers the outer peripheral surface of the header collecting tube 11 that faces the direction in which the heat transfer tube 12 extends. Therefore, since the area of the outer peripheral surface of the header collecting pipe 11 covered by the side surface covering portion 44 can be increased, the header collecting pipe 11 is corroded due to salt damage caused by salt contained in the outside air taken into the housing 20, for example. Can be suppressed.

  In the present embodiment, the comb teeth 46 of the side surface covering portion 44 are inserted into the gap G between the adjacent heat transfer tubes, so that the contact prevention member 40 is restricted from moving up and down with respect to the header collecting tube 11. Is done. Accordingly, the contact preventing member 40 is less likely to be displaced with respect to the header collecting pipe 11, so that it is possible to further enhance the effect of preventing the header collecting pipe 11 from contacting the side plate 51 and the bottom plate 50.

  Further, in the present embodiment, each of the plurality of heat transfer tubes 12 has a flat shape, the thickness direction of the heat transfer tubes 12 faces the longitudinal direction of the header collecting tube 11, and the comb teeth 46 are formed on the heat transfer tubes 12. It extends along the width direction. Therefore, the effect of restricting the movement of the contact prevention member with respect to the header collecting pipe 11 is further enhanced.

  Moreover, in this embodiment, since the front-end | tip of the comb tooth 46 is thinner than a base end, it becomes easy to insert the comb tooth 46 in the clearance gap G between adjacent heat exchanger tubes, and workability | operativity improves in the manufacturing process of an outdoor unit. .

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment, A various change, improvement, etc. are possible in the range which does not deviate from the meaning.

  In the above-described embodiment, each contact prevention member has been described with an example in which the length in the vertical direction is substantially the same as that of the header collecting pipe 11, but is not limited thereto. For example, as in the modification shown in FIGS. 13A and 13B, the vertical length of the contact prevention member 43 may be shorter than the header collecting pipe 11b. In the contact prevention member 43 shown in FIG. 13A, the upper part 443 has a cylindrical shape, and a part of the lower part 444 in the circumferential direction is open. The contact prevention member 43 shown in FIG. 13B is partially open in the circumferential direction in the entire vertical direction.

  In the said embodiment, although the case where the fin 13 of the heat exchanger 10 was thin plate shape was illustrated, it is not limited to this. The fin 13 may be a corrugated fin disposed between the adjacent heat transfer tubes 12 and 12.

  In the embodiment, the side surface covering portion 44 and the positioning portion 45 are connected so as to be orthogonal to each other, but the angle formed by both is not limited to 90 degrees.

  In the above-described embodiment, in each contact prevention member, the side surface covering portion 44 is disposed so as to be parallel to the plane in the direction in which the heat transfer tube 12 extends from the header collecting pipes 11a and 11b. The contact preventing member may be disposed so as to be slightly rotated around the axis of the header collecting pipe 11 as long as it is located between the header collecting pipe 11 and the header collecting pipe 11.

  In the embodiment, the header collecting pipe 11 is cylindrical, but is not limited thereto, and may be other shapes such as a prismatic shape.

DESCRIPTION OF SYMBOLS 1 Outdoor unit 10 Heat exchanger 11 Header collection pipe 11a 1st header collection pipe 11b 2nd header collection pipe 12 Heat transfer pipe 20 Housing | casing 40 Contact prevention member 41 1st contact prevention member 42 2nd contact prevention member 43 3rd contact prevention Member 44 Side surface covering portion 45 Positioning portion 46 Comb teeth 47 Bottom surface holding portion 50 Bottom plate 51 Side plate 53 Rear side plate 55 Left side plate

Claims (7)

A housing (20) including a bottom plate (50) and a side plate (51) rising from the bottom plate (50);
The bottom plate includes a header collecting pipe (11) and a plurality of heat transfer tubes (12) connected to the header collecting pipe (11), which is made of aluminum or aluminum alloy which is a metal different from the casing (20). (50) a heat exchanger (10) disposed above;
A contact prevention member (40) for preventing contact between the header collecting pipe (11), the bottom plate (50) and the side plate (51), made of an insulating material;
The contact preventing member (40) is interposed between the upper surface of the bottom plate (50) and the bottom surface of the header collecting pipe (11), and holds the bottom surface at a position higher than the upper surface (47). ) And the outer surface of the header collecting pipe (11) standing up from the bottom surface holding portion (47) and facing the side plate (51) and the side plate (51). A side surface covering portion (44) that covers the portion,
The lower end part of the said contact prevention member (40) is an outdoor unit which has the shape which a part of side opened.   The outdoor unit according to claim 1, wherein at least a part of a region other than a region facing the side plate (51) is open at a lower end portion of the contact prevention member (40).   The outdoor unit according to claim 2, wherein a lower end portion of the contact prevention member (40) is closed without opening a region facing the side plate (51).   The said side surface covering part (44) is provided to the position which covers the outer surface of the said header collecting pipe (11) which faced the direction where the said heat exchanger tube (12) is extended to any one of Claims 1-3. The outdoor unit described. The header collecting pipe (11) has a long shape in a direction rising from the bottom plate (50),
The contact preventing member (40) has a shape extending along the longitudinal direction of the header collecting pipe (11),
The plurality of heat transfer tubes (12) are arranged along the longitudinal direction of the header collecting tube (11) in a state where a gap is formed between adjacent heat transfer tubes (12),
The outdoor unit according to claim 4, wherein the side surface covering portion (44) has comb teeth (46) inserted into the gap. The plurality of heat transfer tubes (12) each have a flat shape, and the thickness direction of the heat transfer tubes (12) is directed to the longitudinal direction of the header collecting tube (11),
The outdoor unit according to claim 5, wherein the comb teeth (46) extend along a width direction of the heat transfer tube (12).   The outdoor unit according to claim 5 or 6, wherein the comb teeth (46) have a shape whose tip is narrower than a base end.

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