WO2013099897A1

WO2013099897A1 - Outdoor unit for refrigeration device

Info

Publication number: WO2013099897A1
Application number: PCT/JP2012/083564
Authority: WO
Inventors: 貴司小野; 友洋升井; 啓太郎星加; 弘毅安藤; 雅史黒石; 伊藤　哲; 順一下田
Original assignee: ダイキン工業株式会社
Priority date: 2011-12-28
Filing date: 2012-12-26
Publication date: 2013-07-04
Also published as: US20140374078A1; CN103998869A; JP2013139918A; BR112014015787A2; BR112014015787A8; KR20140116432A; EP2806220A4; EP2806220A1; JP5464207B2

Abstract

An outdoor unit for a refrigeration device uses a heat exchanger constructed from aluminum or an aluminum alloy and is less susceptible to the influence of metallic corrosion. An outdoor unit (20) for an air conditioning device (1), the outdoor unit (20) being in accordance with an embodiment of the present invention, is provided with a heat exchanger (25) which is constructed from aluminum or an aluminum alloy, a bottom frame (8) on which the heat exchanger is placed, and a spacer (100) which is disposed between the heat exchanger and the bottom frame. The spacer has a sloped surface (100a) and a horizontal surface (100b). The sloped surface conducts condensation water, which is from the heat exchanger, to the bottom frame. The horizontal surface is in contact with the heat exchanger and allows the heat exchanger to be horizontally placed thereon.

Description

Refrigeration unit outdoor unit

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

In an outdoor unit of a refrigeration apparatus, for example, as in Patent Document 1 (Japanese Patent Laid-Open No. 2010-151387), a spacer member in which the lower end of an aluminum heat exchanger is inclined and the surface facing the lower end of the heat exchanger is inclined. The structure which arrange | positions and promotes drainage by the inclination of a spacer member is reported.

However, in the above configuration, it is necessary to incline the lower end of the heat exchanger, and there is a problem that it is difficult to manufacture.
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.

The outdoor unit of the refrigeration apparatus according to the first aspect of the present invention is disposed between an aluminum or aluminum alloy heat exchanger, a bottom frame on which the heat exchanger is placed, and the heat exchanger and the bottom frame. And a spacer. The heat exchanger includes a plurality of flat tubes, a header collecting tube to which the flat tubes are 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 spacer has an inclined surface and a horizontal surface. The inclined surface guides the dew condensation water of the heat exchanger to the bottom frame. The horizontal plane contacts the heat exchanger and places the heat exchanger horizontally.
Here, the surface of the spacer facing the lower end of the heat exchanger is inclined from the middle of the short direction of the heat exchanger, so that water drops falling from the heat exchanger can be guided to the bottom frame. Corrosion and refrigerant leakage can be prevented. Furthermore, since the heat exchanger is mounted on the horizontal surface of the spacer, it is not necessary to incline the lower end of the heat exchanger, and the manufacture of the heat exchanger is easy.

The ratio of the longitudinal length L1 of the inclined surface and the longitudinal length L2 of the horizontal plane in plan view is not particularly limited as long as water can be guided to the bottom frame and the exchanger can be placed horizontally, L1: L2 = about 1: 2-5.
The inclination of the inclined surface is not particularly limited as long as the dew condensation water of the heat exchanger can be guided to the bottom frame, but can be 7 to 20 ° downward from the horizontal direction. When the inclination angle is smaller than 7 °, the drainage function is not sufficient, and when it is larger than 20 °, it is difficult to transmit water especially in the case of a water repellent material.
Condensed water, rainwater, etc. are contained in the dew condensation water of the heat exchanger.
As the material of the spacer, rubber (rubber) is preferable from the viewpoint of being able to stably mount a heat exchanger and having water resistance and vibration 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.

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 fin has a water guide portion, and the inclined surface is provided in an extended portion of the water guide portion.
Here, since the fin has the water guide portion, the dew condensation water of the heat exchanger can be guided to the spacer. Further, since the inclined surface is provided in the extension portion of the water guide portion, water guided from the heat exchanger to the spacer can be guided to the bottom frame through the inclined surface, so that the heat exchanger is corroded. , Refrigerant leakage can be prevented.

The outdoor unit of the refrigeration apparatus according to the third aspect of the present invention is the outdoor unit of the refrigeration apparatus according to the first or second aspect, wherein a drainage structure is provided below the spacer. Examples of the drainage structures include openings, cutouts, grooves, and the like.
Here, water that has fallen from the heat exchanger to the spacer can be guided from the drainage structure below the spacer to the bottom frame, so that corrosion of the heat exchanger 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 any of the first to third aspects, and the spacer is disposed at the lower end of the bent portion of the heat exchanger. .
Here, since the location of the spacer can be secured while making the outdoor unit compact, corrosion of the heat exchanger and refrigerant leakage can be prevented.

The outdoor unit of the refrigeration apparatus according to the fifth aspect of the present invention is the outdoor unit of the refrigeration apparatus according to any one of the first to fourth aspects. The spacer is provided with an extending portion extending obliquely upward from the horizontal plane. Yes.

Here, since the stretched portion can more effectively guide the condensed water from the heat exchanger to the drainage structure, corrosion of the heat exchanger and refrigerant leakage can be prevented.

In the outdoor unit of the refrigeration apparatus according to the first aspect of the present invention, water drops falling from the heat exchanger can be guided to the bottom frame, and corrosion of the heat exchanger and refrigerant leakage can be prevented. Furthermore, it is not necessary to incline the lower end of the heat exchanger, and the heat exchanger can be easily manufactured.
In the outdoor unit of the refrigeration apparatus according to the second aspect of the present invention, the condensed water of the heat exchanger can be guided to the spacer, and further, can be guided from the inclined surface to the bottom frame. Refrigerant leakage can be prevented.
In the outdoor unit of the refrigeration apparatus according to the third aspect of the present invention, water that has fallen from the heat exchanger to the spacer can be effectively guided to the bottom frame, and corrosion of the heat exchanger and refrigerant leakage can be prevented.
In the outdoor unit of the refrigeration apparatus according to the fourth aspect of the present invention, the location of the spacer can be secured while making the outdoor unit compact, and corrosion of the heat exchanger and refrigerant leakage can be prevented.

In the outdoor unit of the refrigeration apparatus according to the fifth aspect of the present invention, the condensed water from the heat exchanger can be more effectively guided to the drainage structure, and corrosion of the heat exchanger and refrigerant leakage 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 the elements on larger scale when the flat tube and fin of an outdoor heat exchanger are cut | disconnected in the perpendicular direction. Some reference numerals are omitted for the same members. 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 a front view of the spacer concerning one embodiment of the present invention. It is a top view of the spacer concerning one embodiment of the present invention. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. FIG. 6 is a cross-sectional view taken along the line IX-IX in FIG. 5.

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 bottom frame 8 has a rising portion 8a (see FIG. 5) in the vertical direction at the edge portion. And the left side of the partition plate 58 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 fin 4 has a bent portion 25b. Below the outdoor heat exchanger 25, a spacer described later is disposed so as to contact the lower end 25a of the bent portion 25b.
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. is doing.
FIG. 4 is a partially enlarged view when the flat tube 2 and the fins 4 are cut in the vertical direction. The flat tube 2 has upper and lower flat portions serving as heat transfer surfaces and a plurality of internal flow paths 2a through which the refrigerant flows. The flat tubes 2 are arranged in a plurality of stages at intervals in a state where the plane portion is directed up and down. The fin 4 is in contact with the flat tube 2. The fin 4 is formed with a plurality of cutouts 4b extending horizontally so that the fin 4 can be inserted into the plurality of flat tubes 2 arranged between the

header collecting tubes

61 and 62. The shapes of the cutouts 4b of these fins 4 substantially coincide with the outer shape of the cross section of the flat tube 2 as shown in FIG. The fin 4 includes a waffle and a louver, and has a water guide portion 4a connected in the vertical direction on the most downstream side of the fin. Condensed water is guided to the lower part of the heat exchanger through the water guiding portion 4a.

As shown in FIG. 5, the bottom frame 8 has a substantially rectangular shape mainly in a plan view, and has a groove (drain pan) 8b. A heat exchanger (not shown) is placed on the drain pan, and a first drain opening 10 and other plural 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 spacer 100 is disposed at a portion indicated by 25c of the drain pan, and the bent portion 25b of the heat exchanger is placed thereon. Reference numeral 26 denotes a convex portion for fixing the position of the spacer 100. The spacer 100 is disposed so that the short direction of the heat exchanger 25 and the longitudinal direction of the spacer 100 coincide. By disposing the spacer 100 at the lower end 25a (FIG. 3) of the bent portion of the heat exchanger 25, the drainage mechanism of the heat exchanger 25 can be provided in a compact manner.

(2) Spacer FIGS. 6 to 8 show a front view, a plan view, and a cross-sectional view of the spacer 100. The spacer 100 has an inclined surface 100a that guides the dew condensation water of the heat exchanger 25 to the bottom frame 8 on the surface facing the lower end of the heat exchanger 25, and the heat exchanger 25 mounted horizontally in contact with the heat exchanger 25. A horizontal plane 100b is provided. The inclination of the inclined surface 100a is 10 ° downward from the horizontal direction.
The inclined surface 100a is provided so as to be inclined from the middle of the heat exchanger 25 in the short direction. By doing so, water drops falling from the heat exchanger 25 can be guided to the bottom frame 8. As shown in FIG. 5, the bottom frame 8 is smoothly drained because the opening 11 is provided in the vicinity of the arrangement position 25 c of the spacer 100.
The ratio between the longitudinal length L1 of the inclined surface 100a and the longitudinal length L2 of the horizontal surface 100b in a plan view is L1: L2 = about 1: 3. By providing the inclined surface 100a and the horizontal surface 100b at such a ratio, it is not necessary to incline the lower end of the heat exchanger 25 while promoting drainage of condensed water from the heat exchanger 25. It can be easily placed horizontally.

A drainage opening 101 is provided in the lower part of the spacer 100. In the portion where the drainage opening 101 is provided, since the spacer 100 is thin, water is easily guided to the drainage opening 101.
Further, the spacer 100 is provided with an extending portion 102 that extends obliquely upward from the horizontal surface 100b. The heat exchanger 25 can be fixed by the extending portion 102, the vibration isolation is improved, and drainage is further promoted. Further, when the heat exchanger is displaced due to vibration, the heat exchanger can be prevented from coming into contact with the rising portion of the bottom frame.
A recess 103 is provided on the surface of the spacer 100 opposite to the surface facing the heat exchanger. The convex part 26 (FIG. 5) provided in the bottom frame 8 is inserted into the concave part 103, and the position of the spacer 100 with respect to the bottom frame 8 is determined.

FIG. 9 shows a state where the outdoor heat exchanger 25 is placed on the bottom frame 8 via the spacer 100. 9 is a cross-sectional view taken along the line IX-IX in FIG. The spacer 100 is arranged at the spacer arrangement position 25 c of the bottom frame 8. And the horizontal surface 100b provided in the opposite side to the opposing surface with the bottom frame 8 of the spacer 100 contact | connects the lower end 25a of the bending part 25b of the heat exchanger 25 which has the flat tube 2 and the fin 4, and is the heat exchanger 25. Is placed on the spacer 100. The side surface of the heat exchanger 25 is disposed by the extending portion 102 so as not to directly contact the bottom frame 8. As a result, the vibration isolator of the heat exchanger is enhanced and water is effectively guided to the opening 11 of the bottom frame 8.
Condensed water of the heat exchanger 25 is guided to the spacer 100 through the water guide portions 4a of the fins 4, and is guided to the bottom frame 8 by the inclined surface 100a. Further, since the drainage opening 101 of the spacer 100 is provided at the lower end portion of the fin 4, a part of the condensed water dripped on the horizontal surface 100 b of the spacer 100 is guided to the bottom frame 8 from the drainage opening 101.

(3) Features of outdoor unit (3-1)
The outdoor unit 20 of the air conditioner 1 according to the present embodiment includes an aluminum or aluminum alloy heat exchanger 25, a bottom frame 8 on which the heat exchanger 25 is placed, a heat exchanger 25, and a bottom frame 8. And a spacer 100 disposed between the two. The spacer 100 has an inclined surface 100a and a horizontal surface 100b. The inclined surface 100a guides the dew condensation water from the heat exchanger 25 to the bottom frame 8. The horizontal surface 100b contacts the heat exchanger 25 and places the heat exchanger 25 horizontally.
Here, the surface of the spacer facing the lower end of the heat exchanger is inclined from the middle of the short direction of the heat exchanger, so that water drops falling from the heat exchanger can be guided to the bottom frame. Corrosion and refrigerant leakage can be prevented. Furthermore, since the heat exchanger is mounted on the horizontal surface of the spacer, it is not necessary to incline the lower end of the heat exchanger, and the manufacture of the heat exchanger is easy.

(3-2)
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, the fin 4 has the water guide portion 4a, and the inclined surface 100a is provided in an extended portion of the water guide portion 4a.
Here, the dew condensation water of the heat exchanger is guided to the spacer through the water guiding portion. And dew condensation water is guide | induced to the bottom frame from the inclined surface of the extension part of a water guide part, and corrosion of a heat exchanger and a refrigerant | coolant leak are prevented.
(3-3)
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, a drainage opening 101 is provided in the lower part of the spacer 100.
Here, water that has fallen into the spacer 100 from the heat exchanger 25 is guided to the bottom frame 8 from the drainage opening 101 at the lower part of the spacer 100, so that corrosion of the heat exchanger 25 and refrigerant leakage are prevented.

(3-4)
In the outdoor unit 20 of the air conditioner 1 according to this embodiment, the spacer is disposed at the lower end of the bent portion of the heat exchanger.
Here, since the location of the spacer can be secured while making the outdoor unit compact, corrosion of the heat exchanger and refrigerant leakage are prevented.
(3-5)
In the outdoor unit 20 of the air conditioner 1 according to the present embodiment, the spacer is provided with an extending portion that extends obliquely upward from the horizontal plane.
Here, since the condensed water from the heat exchanger can be more effectively guided to the drainage structure by the extending portion, corrosion of the heat exchanger and refrigerant leakage are prevented.

(4) Modifications Modifications of the present embodiment are shown below. A plurality of modified examples may be appropriately combined.
(4-1) 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.

As described above, according to the present invention, since the influence of metal corrosion is suppressed, it is useful for an outdoor unit of a refrigeration apparatus.

2 Flat tube 4 Fin 4a

Water transfer section

61, 62 Header collecting pipe 8 Bottom frame 8b Groove (drain pan)
10 First drain opening 11 Opening 20 Outdoor unit 25 Outdoor heat exchanger (heat exchanger)
25b Bending portion 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 100 Spacer 100a Inclined surface 100b Horizontal surface 101 Drain opening 102 Extending portion

JP 2010-151387

Claims

The heat exchanger is made of aluminum or aluminum alloy, and includes a plurality of flat tubes (2), a header collecting tube (6) to which the flat tubes are connected, and a plurality of fins ( 4) and a heat exchanger (25) for exchanging heat between the fluid flowing inside the flat tube and the air flowing outside the flat tube,
A bottom frame (8) for mounting the heat exchanger;
A spacer (100) disposed between the heat exchanger and the bottom frame,
The spacer has an inclined surface (100a) for guiding condensed water of the heat exchanger to the bottom frame, and a horizontal surface (100b) for placing the heat exchanger horizontally in contact with the heat exchanger. ing,
Outdoor unit of refrigeration equipment.
The fin has a water guide portion (4a), and the inclined surface is provided in an extended portion of the water guide portion.
The outdoor unit according to claim 1.
A drainage structure (101) is provided below the spacer.
The outdoor unit according to claim 1 or 2.
The spacer is disposed at the lower end (25a) of the bent portion (25b) of the heat exchanger,
The outdoor unit according to any one of claims 1 to 3.
The spacer is provided with an extending portion (102) extending obliquely upward from the horizontal plane.
The outdoor unit according to any one of claims 1 to 4.