JP2013139919A - Refrigerator outdoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator outdoor unit that is hardly affected by metal corrosion, in the refrigerator outdoor unit using an aluminum or aluminum alloy heat exchanger.SOLUTION: An outdoor unit of an air conditioning apparatus includes an aluminum or aluminum alloy heat exchanger 25, and a bottom frame 8 with the heat exchanger 25 placed thereon. The heat exchanger 25 has a flat pipe 2, a fin 4, and a header collecting pipe 6. The bottom frame 8 has a bottom surface 81 and a vertical surface 82 extending upward from a circumferential edge of the bottom surface 81. The bottom surface 81 is provided with a first drainage structure 10. The vertical surface 82 is provided with a second drainage structure 12. A lowest end 2a of the flat pipe 2 is provided at a position higher than the second drainage structure 12.

Description

  The present invention relates to an outdoor unit of a refrigeration apparatus.

  In the outdoor unit of the refrigeration apparatus, for example, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2011-145029), the bottom frame is press-molded according to the shape of the heat exchanger in order to prevent corrosion of the bottom frame. A case has been reported in which a drainage outlet is provided near the center of the D-shaped drainage and the condensed water is discharged from there.

  However, when the drain port formed in the bottom frame is blocked, drain water is not discharged, the heat exchanger is immersed in water, and there is a risk of corrosion and refrigerant leakage.

  An object of the present invention is to provide an outdoor unit of a refrigeration apparatus that is less susceptible to metal corrosion in an outdoor unit of a refrigeration apparatus that uses a heat exchanger made of aluminum or aluminum alloy.

  An outdoor unit of a refrigeration apparatus according to a first aspect of the present invention includes a heat exchanger made of aluminum or aluminum alloy, and a bottom frame on which the heat exchanger is placed. The heat exchanger has a plurality of flat tubes arranged so that the side surfaces face each other, a header collecting tube to which each flat tube is connected, and a plurality of fins joined to the flat tubes. The heat exchanger exchanges heat between the fluid flowing inside the flat tube and the air flowing outside the flat tube. The bottom frame has a bottom surface and a vertical surface extending upward from the periphery of the bottom surface. A first drainage structure is provided on the bottom surface. A second drainage structure is provided on the vertical surface. The lowermost end of the flat tube is provided at a position higher than the second drainage structure.

  Here, the second drainage structure provided on the vertical surface of the bottom surface allows drainage so that the flat tube does not flood even when the drainage port formed in the bottom frame is closed. For this reason, when the drain outlet formed in the bottom frame is blocked, drain water is not discharged, and corrosion and refrigerant leakage due to the flat tube of the heat exchanger being immersed in water can be prevented.

  The outdoor unit of the refrigeration apparatus according to the second aspect of the present invention is the outdoor unit of the refrigeration apparatus according to the first aspect, wherein the lowermost end of the fin is provided at a position higher than the second drainage structure.

  Here, even when the drain port formed in the bottom frame is blocked, the fin can be drained so that the fins are not submerged. Therefore, corrosion and refrigerant leakage due to the fins being immersed in water can be prevented.

  The outdoor unit of the freezing apparatus which concerns on the 3rd viewpoint of this invention is equipped with the cap which covers the lower end surface of a header collecting pipe from the bottom in the outdoor unit of the freezing apparatus which concerns on a 1st viewpoint or a 2nd viewpoint. A second drainage structure is provided below the upper end of the cap.

  Here, even when the drainage port formed in the bottom frame is blocked, drainage is possible so that the upper part of the header collecting pipe covered with the cap is not submerged. Therefore, corrosion of the header collecting pipe and refrigerant leakage can be prevented.

  The outdoor unit of the refrigeration apparatus according to the fourth aspect of the present invention is the outdoor unit of the refrigeration apparatus according to the third aspect, wherein the cap has a bottom surface and a side surface, and the side surface has a third drainage structure. The second drainage structure is provided below the lower end face of the header collecting pipe.

  Here, since there is a drainage structure on the side of the cap, the condensed water that has been connected to the header collecting pipe is drained. Furthermore, since there is the second drainage structure below the lower surface of the header collecting pipe, even if water accumulates in the drain pan, the lower end of the header collecting pipe will not be submerged. Therefore, corrosion and refrigerant leakage due to the header collecting pipe being immersed in water can be prevented.

  Examples of the drainage structures include openings, cutouts, grooves, and the like.

  As a material of the cap, rubber (rubber) is preferable from the viewpoint of being able to adhere to the header collecting pipe and having water resistance, natural rubber, chloroprene rubber, nitrile rubber, butyl rubber, ethylene propylene rubber, styrene / butadiene rubber, silicone rubber, Fluorine rubber, aflas, hydrogenated nitrile rubber, urethane rubber, etc. can be used.

  In the outdoor unit of the refrigeration apparatus according to the first aspect of the present invention, when the drain port formed in the bottom frame is blocked, the drain water is not discharged, and the flat tube of the heat exchanger is immersed in water. Prevents corrosion and refrigerant leakage.

  In the outdoor unit of the refrigeration apparatus according to the second aspect of the present invention, corrosion and refrigerant leakage due to the fins being immersed in water can be prevented.

  In the outdoor unit of the refrigeration apparatus according to the third aspect of the present invention, the header collecting pipe can be prevented from corroding and refrigerant leakage.

  In the outdoor unit of the refrigeration apparatus according to the fourth aspect of the present invention, corrosion and refrigerant leakage due to the header collecting pipe being immersed in water can be prevented.

It is a schematic perspective view of the outdoor unit of the freezing apparatus which concerns on one Embodiment of this invention. It is a schematic perspective view of the outdoor unit of the refrigeration apparatus according to one embodiment of the present invention with the top plate, left side plate, right front plate and right rear plate removed. It is a schematic perspective view of an outdoor heat exchanger. It is a top view of the bottom frame of the outdoor unit of the freezing apparatus which concerns on one Embodiment of this invention. It is VV sectional drawing in the top view of the bottom frame of FIG. FIG. 5 is a rear view of the bottom frame of FIG. 4. It is the schematic which shows the height of the 2nd drainage opening.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The outdoor unit of the refrigeration apparatus of this embodiment is used as an outdoor unit of an air conditioner.

(1) Schematic configuration of outdoor unit FIG. 1 shows an outdoor unit of an air conditioner according to an embodiment of the present invention. FIG. 1 is a perspective view showing an outdoor unit 20 of the air conditioner. The outdoor unit 20 is installed outside an air-conditioning target space (indoor) that performs air conditioning, and the inside of the substantially rectangular parallelepiped box-shaped casing 50 is separated by a partition plate (not shown) extending vertically to a fan room and a machine room. It is divided into and. The outdoor unit 20 is connected to an indoor unit (not shown) arranged in the air-conditioning target space via a refrigerant communication pipe (not shown).

  The outdoor unit 20 mainly includes a substantially box-shaped casing 50, an outdoor fan (not shown), a heat exchanger, a compressor, a valve, a pipe, and the like, and refrigerant circuit components (not shown) constituting a refrigerant circuit. And an electrical component unit (not shown) for performing operation control.

  The casing 50 is formed with air outlets located at the center and the left of the front surface 51, and the air sent out by the outdoor fan is blown forward from the air outlet.

  The casing 50 includes a left side plate 54 and a bottom frame 8 in addition to the top plate 57, the right rear plate 56, and the right front plate 55. Reference numeral 60 denotes a fan grill attached to the outside of the casing 50.

  FIG. 2 is a schematic perspective view of the outdoor unit of the refrigeration apparatus according to the embodiment of the present invention with the top plate, left side plate, right front plate, and right rear plate removed. On the bottom frame 8, the heat exchanger 25 is mounted, and the outdoor fan 35 is arrange | positioned in front of it. The left side of the partition plate is the blower room, and the right side is the machine room.

  FIG. 3 is a schematic perspective view of the outdoor heat exchanger 25. As shown in FIG. 3, the outdoor heat exchanger 25 includes a flat tube 2, fins 4, and header collecting tubes 61 and 62. In FIG. 3, the fins 4 are omitted. Further, a part of the reference numerals of the flat tube 2 is omitted.

  The outdoor heat exchanger 25 condenses or evaporates the refrigerant flowing inside through heat exchange with outdoor air. All of the outdoor heat exchangers 25 are made of aluminum or aluminum alloy. The outdoor heat exchanger 25 has an appropriate space between the casing 50 and the resin member or the like between the casing 50 and the outdoor heat exchanger 25 so as not to directly contact the casing 50 (see FIG. 1). Installed in the casing 50.

  As shown in FIG. 2, the outdoor heat exchanger 25 extends to the left from the vicinity of the end of the partition plate 58 along the back surface of the casing 50, and changes its direction in the vicinity of the left rear corner of the casing 50. 54 (see FIG. 1) extends forward.

  The header collecting pipes 61 and 62 are connected to both ends of the flat tubes 2 arranged in a plurality of stages in the vertical direction. The header collecting pipes 61 and 62 have a function of supporting the flat pipe 2, a function of guiding the refrigerant to the internal flow path (not shown) of the flat pipe 2, and a function of collecting the refrigerant that has come out of the internal flow path. doing.

(2) Configuration of Bottom Frame As shown in FIG. 4, the bottom frame 8 mainly has a substantially rectangular shape in plan view, and the first drainage opening 10 is formed in a portion where a heat exchanger (not shown) is placed. A plurality of other openings 11 are provided. The water accumulated in the bottom frame 8 is basically drained from these openings 10 and 11. The 1st drainage opening 10 is arrange | positioned in the lowest position in the orthogonal | vertical direction, and condensed water is discharged | emitted from here.

  The bottom frame 8 has a bottom surface 81 and a vertical surface 82. The vertical surface 82 is provided with a second drainage opening 12 which will be described in detail later.

  As shown in FIG. 5, the bottom frame 8 is composed of a bottom surface 81 along a horizontal plane and a vertical surface 82 that rises vertically upward from each of the four edge portions of the bottom surface 81. The vertical surface 82 is formed integrally with the bottom surface 81 by press molding. By this press molding, shallow irregularities and grooves for increasing the strength are formed on the bottom surface 81.

  The bottom surface 81 is provided with a recess 83. The header collecting pipe 62 is inserted into the recess 83. Although not shown, the header collecting pipe 61 is also inserted into a recess at an appropriate position provided on the bottom frame 8. The header collecting pipes 61 and 62 are covered with caps, which will be described later, from below. In this case, the cap portion is inserted into the recess 83. By doing in this way, the horizontal height of the header collecting pipes 61 and 62 can be made high, and the flooding of a header collecting pipe can be suppressed effectively. Thus, the mounting position of the heat exchanger 25 on the bottom frame 8 is determined.

  FIG. 6 is a rear view of the bottom frame 8 and shows a bottom surface 81 and a vertical surface 82. A second drainage opening 12 is provided in the vertical surface 82. 13 is a hole for attaching another member.

(3) Installation of Heat Exchanger on Bottom Frame FIG. 7 conceptually shows a state where the outdoor heat exchanger 25 is placed on the bottom frame 8. In FIG. 7, the recess 83 is omitted. A heat exchanger 25 having the flat tubes 2, the fins 4 and the header collecting tubes 6 is placed on the bottom surface 81 of the bottom frame 8. The second drainage opening 12 is provided on the vertical surface 82 that rises vertically upward from the bottom surface 81 of the bottom frame 8. When the first drainage opening 10 formed on the bottom surface 81 of the bottom frame 8 is blocked for some reason such as fallen leaves, drain water is discharged from the second drainage opening 12. For this reason, it is avoided that the heat exchanger is immersed in water, and corrosion and refrigerant leakage occur.

  The header collecting pipe 6 is provided with a rubber cap 14 that covers the lower end surface 6a from below. The cap includes a bottom surface 15 and a side surface 16 that rises vertically upward from the bottom surface 15. An opening 17 is provided in the side surface 16.

(4) Position of the second drainage opening In the present embodiment, the second drainage opening 12 is provided at a position lower than the lowermost end 2a of the flat tube 2. By doing in this way, the flat tube 2 can be protected from flooding and corrosion. In the present embodiment, the second drainage opening 12 is provided at a position lower than the lowermost end 4 a of the fin 4. By doing in this way, the fin 4 can be protected from water immersion and corrosion. Furthermore, in this embodiment, the 2nd drainage opening 12 is provided in the position lower than the upper end 14a of the cap which covered the header collecting pipe 6 from the bottom. By doing in this way, the header collecting pipe 6 can be protected from water immersion and corrosion.

  Furthermore, in this embodiment, the 2nd drainage opening 12 is provided below the header collecting pipe lower end surface 6a. Since the cap 14 has the opening 17 on the side surface 16, the condensed water that has been connected to the header collecting pipe 6 is drained. Furthermore, since the second drainage opening 12 is located below the header collecting pipe lower end surface 6a, the first drainage opening 10 and the opening 11 provided on the bottom surface 81 of the bottom frame 8 are blocked by fallen leaves or the like, and the bottom frame 8 is closed. Even if water accumulates, the lower end of the header collecting pipe is not submerged.

(5) Features of outdoor unit (5-1)
The outdoor unit 20 of the air conditioner 1 according to the present embodiment includes a heat exchanger 25 made of aluminum or aluminum alloy, and a bottom frame 8 on which the heat exchanger 25 is placed. The heat exchanger 25 includes the flat tube 2, the fins 4, and the header collecting tube 6. The bottom frame 8 has a bottom surface 81 and a vertical surface 82 that extends upward from the periphery of the bottom surface 81. A first drainage opening 10 is provided on the bottom surface 81. In the vertical surface 82, a second drainage opening 12 is provided at a position lower than the lowest end 2a of the flat tube 2.

Here, even when the first drainage opening 10 and the opening 11 formed in the bottom frame 8 are closed by the second drainage opening 12 provided in the vertical surface 82 of the bottom surface 81, the flat tube 2 can be drained so as not to be submerged. is there. For this reason, corrosion and refrigerant leakage due to the flat tube 2 being immersed in water without drain water being discharged can be prevented. Thereby, the corrosion resistance of the outdoor unit 20 of the air conditioning apparatus 1 can be improved (5-2).
In the outdoor unit 20 of the air conditioner 1 according to this embodiment, the lowermost end of the fin 4 is provided at a position higher than the second drainage opening 12.

Here, even when the first drainage opening 10 and the opening 11 formed in the bottom surface 81 of the bottom frame 8 are closed, the fin 4 can be drained so as not to be submerged. Therefore, corrosion and refrigerant leakage due to the fin 4 being immersed in water can be prevented. Thereby, the corrosion resistance of the outdoor unit 20 of the air conditioning apparatus 1 can be improved (5-3).
The outdoor unit 20 of the air conditioner 1 according to the present embodiment further includes a cap 14 that covers the lower end surface 6a of the header collecting pipe 6 from below. The second drainage opening 12 is provided below the upper end 14 a of the cap 14.

Here, even when the first drainage opening 10 and the opening 11 formed in the bottom surface 81 of the bottom frame 8 are closed, the drainage is possible so that the upper part of the header collecting pipe 6 covered with the cap 14 is not submerged. . Therefore, corrosion of the header collecting pipe 6 and refrigerant leakage can be prevented. Thereby, the corrosion resistance of the outdoor unit 20 of the air conditioning apparatus 1 can be improved (5-4).
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, the cap 14 includes a bottom surface 15 and a side surface 16, and the side surface 16 has an opening 17. And the 2nd drainage opening 12 is provided below the header collecting pipe lower end surface 6a.

  Here, since the cap 17 has the opening 17, the dew condensation water that has connected the header collecting pipe 6 is drained. Further, since the second drainage opening 12 is located below the header collecting pipe lower end surface 6a, even if water accumulates in the bottom frame 8, the header collecting pipe lower end is not flooded. Therefore, corrosion and refrigerant leakage due to the header collecting pipe 6 being immersed in water can be prevented. Thereby, the corrosion resistance of the outdoor unit 20 of the air conditioning apparatus 1 can be improved.

(6) Modification Examples of the present embodiment are shown below. A plurality of modified examples may be appropriately combined.

(6-1) Modification A
Although the outdoor unit 20 shown by said embodiment is used for the air conditioning apparatus 1, it is not limited to it, You may be used for another refrigeration apparatus.

2 Flat tube 2a Bottom end 4 of flat tube 4 Fin 4a Bottom end 6, 61, 62 of fin Header assembly tube 6a Bottom end surface 8 of header assembly tube Bottom frame 81 Bottom surface 82 Vertical surface 83 Recess 10 First drain opening 11 Opening 12 First 2 Drainage opening 13 Mounting hole 14 Cap 14a Cap upper end 15 Cap bottom surface 16 Cap side surface 17 Cap opening 20 Outdoor unit 25 Outdoor heat exchanger (heat exchanger)
35 Outdoor fan 50 Casing 51 Front plate 54 Left plate 55 Right front plate 56 Right rear plate 57 Top plate 58 Partition plate 60 Fan grill

JP2011-145029

Claims (4)

A heat exchanger (25) made of aluminum or aluminum alloy, and a plurality of flat tubes (2) arranged so that side surfaces thereof are opposed to each other, and a header collecting tube (6, 61) to which the flat tubes are connected , 62) and a plurality of fins (4) joined to the flat tube, and the fluid that flows inside the flat tube exchanges heat with the air flowing outside the flat tube (25) When,
A bottom frame (8) for mounting the heat exchanger;
With
The bottom frame has a bottom surface (81) and an edge vertical surface (82) extending upward from a peripheral edge of the bottom surface;
A first drainage structure (10) is provided on the bottom surface, and a second drainage structure (12) is provided on the edge vertical surface;
The lowest end (2a) of the flat tube is provided at a position higher than the second drainage structure,
Refrigeration unit outdoor unit The second drainage structure is provided below the lowest end (4a) of the fin,
The outdoor unit according to claim 1. Furthermore, the cap (14) which covers the lower end surface (6a) of the header collecting pipe from below is provided, and the second drainage structure is provided below the upper end (14a) of the cap.
The outdoor unit according to claim 1 or 2. The cap includes a bottom surface (15) and a side surface (16), and has a third drainage structure (17) on the side surface, and the second drainage structure is below the lower end surface (6a) of the header collecting pipe. Provided in the
The outdoor unit according to claim 3.

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