JP2000154992A - Air heat exchanger - Google Patents

Abstract

(57) [Problem] To provide an air heat exchanger in which a corrugated fin and a flat heat transfer tube are juxtaposed between headers, which can be easily formed by bending and easily incorporated in an air conditioner. SOLUTION: A bent portion 5 between upper and lower headers 3A, 3B.
A, 5B, 5C are provided with no corrugated fins 4, 4,..., Flat heat transfer tubes 2, 2,... To facilitate bending of the upper and lower headers 3A, 3B. The spaces of 5A, 5B, 5C are shielded by shielding plates 6A, 6B, 6
An air heat exchanger equipped with a flat heat transfer tube and a corrugated fin that can be easily bent into a desired shape and has no reduction in heat exchange performance by shielding air with a C to ensure that air passes through the heat exchange part. Available.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air heat exchanger having a corrugated fin and a flat heat transfer tube.

[0002]

2. Description of the Related Art As shown in FIG. 9, for example, a plurality of flat heat transfer tubes 2, 2... And corrugated fins 4, 4,. Thus, an air heat exchanger 1 having a high heat transfer coefficient with air has conventionally been provided.

The air heat exchanger 1 is connected to pipe-shaped upper and lower headers 3A and 3B through which a refrigerant is introduced and discharged, and communicates with the upper and lower headers 3A and 3B at a predetermined interval in the longitudinal direction. Flat heat transfer tubes 2,
.. And the plurality of flat heat transfer tubes 2, 2...
The outer flat heat transfer tubes 2, 2
..Corrugated fins 4 heat-sealed to flat heat transfer tubes
4 ...

The flat heat transfer tubes 2, 2,..., As shown in FIG.
Have a multi-hole structure, and the refrigerant introduced and distributed from the outside via the upper header 3A flows uniformly into the respective refrigerant circulation holes 2a, 2a,. , Heat exchange between the internal refrigerant and the external air is performed in a wide heat transfer area.

The corrugated fins 4, 4...
For example, as shown in FIG. 11, a plurality of cut-and-raised pieces (louvers) 4 for improving heat transfer efficiency with air are provided on a flat surface (fin surface) excluding the bent portion (bent portion).
are formed, and the cut and raised pieces 4a, 4a,
4a, the heat exchange performance between the refrigerant and the air is made as high as possible.

By the way, the air heat exchanger 1 as described above
For example, as a heat exchanger for an air conditioner, it is necessary to form the heat exchanger into various shapes such as a square shape, a U-shape, and an L-shape according to the structure of the air conditioner to be incorporated. Becomes In this case, for example, the upper and lower headers 3A and 3B are first bent and formed into, for example, a square shape.
, And then the corrugated fins 4, 4,... And the flat heat transfer tubes 2, 2,... Are alternately arranged side by side between the bent upper and lower headers 3A, 3B ( For example, see JP-A-10-206041) or
Or, as shown in FIG. 12, the corrugated fins 4, 4... And the flat heat transfer tubes 2, 2,. For example, it is conceivable to bend into a square shape as shown in FIG.

[0007]

However, the method of assembling the corrugated fins 4, 4... And the flat heat transfer tubes 2, 2,. While it takes time and effort to attach, FIG.
13, an air heat exchanger in which corrugated fins 4, 4,... And flat heat transfer tubes 2, 2,... Are integrated between upper and lower headers 3A, 3B is bent as shown in FIG. In order to form a square air heat exchanger, corrugated fins 4, 4.
.. And the corrugated fins 4, 4,... With respect to the upper and lower headers 3A, 3B.
There is a problem that the fitting part and the connecting part are damaged and cannot be incorporated into the actual machine.

The present invention has been made in order to solve such a problem. Even when the bending method after the integration of flat heat transfer tubes or the like is adopted as in the latter case, the bending of the air heat exchanger is also performed. An air heat exchanger equipped with corrugated fins and flat heat transfer tubes that can be easily incorporated into actual equipment such as air conditioners without causing the flat heat transfer tubes and other fitting / connection parts to break. The purpose is to provide.

[0009]

Means for Solving the Problems In order to achieve the above objects, the present invention has the following means for solving the problems.

(1) The invention of claim 1 The air heat exchanger of the present invention is a corrugated fin 4, 4
.. The air heat exchanger 1 formed by combining the flat heat transfer tubes 2, 2,..., The headers 3A, 3B and bent into a predetermined shape, and the bent portions 5A to 5C include: The corrugated fins 4 and the flat heat transfer tubes 2, 2,... Are not provided.

Therefore, the bent portions 5A to 5A
Since the rigidity of C becomes low and only the headers 3A and 3B need to be bent, the air heat exchanger 1 can be easily bent. Further, since the bent portions 5A to 5C, which become corner portions after forming, are places where the amount of airflow which is originally hard to contribute to heat exchange is small, the flat heat transfer tubes 2, 2,... And the corrugated fins 4, 4,.・ ・ It is possible to secure sufficient heat exchange performance even without.

(2) The air heat exchanger according to the second aspect of the present invention is the air heat exchanger according to the first aspect of the present invention, wherein the bent portions 5A to 5C are provided with shielding plates 6A, 6B and 6C. The configuration is provided.

Therefore, according to the structure of the first aspect of the present invention, the bending of the air heat exchanger is easy, and the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,. The space part where the space has been lost is
B, 6C, block the passage of air in the same space after assembling into the air conditioner, and corrugate fins 4, 4, ..., flat heat transfer tubes 2, 2
... Promotes the effective amount of air passing through the portion and prevents a decrease in heat exchange performance.

(3) The third aspect of the present invention is the air heat exchanger according to the first or second aspect of the present invention, further comprising the corrugated fins 4, 4,...
The flat heat transfer tubes 2, 2, ... and the headers 3A, 3B are each made of aluminum.

Therefore, with this configuration, the heat exchange is lighter, easier to process, and more efficient than an air heat exchanger composed of other materials such as copper. It is also cheaper than copper.

(4) The air heat exchanger according to the present invention, in the air heat exchanger according to the first, second or third aspect, wherein the air heat exchanger is a refrigerant / air heat exchanger for an air conditioner. It is configured as a vessel.

Therefore, according to the structure of the first, second or third aspect of the present invention, a refrigerant / air heat exchanger which is easy to mold, has high heat exchange performance, is lightweight and inexpensive, and is particularly suitable for an air conditioner is provided. can do.

[0018]

As a result of the above construction, according to the air heat exchanger of the present invention, the performance of the heat exchanger is sufficiently ensured, and the air heat exchanger is suitable for incorporation into an air conditioner which is easy to bend. An air heat exchanger can be obtained.

[0019]

(Embodiment 1) FIGS. 1 to 3 show the structure of an air heat exchanger according to Embodiment 1 of the present invention.

The air heat exchanger 1 of this embodiment is, for example, as shown in FIG. 2, a square tubular air heat exchanger suitable for being incorporated into a ceiling-mounted air conditioner. When the air heat exchanger 1 is formed, first, as shown in FIG. 1, a pipe-shaped upper and lower header 3A, 3B having a required length and extending straight and parallel to each other at a predetermined interval is illustrated. .. And the corrugated fins 4, 4... Similar to FIG. 11 are alternately formed except for the bent parts 5A to 5C forming the corners as shown in FIG. , And a bent portion 5 without the flat heat transfer tubes 2, 2,... And the corrugated fins 4, 4,.
A to 5C (bending centers A, B, and C) are bent using a bending machine, and then, as shown in FIG. 2, the corrugated fins 4, 4,... And the flat heat transfer tubes 2, 2,. -Shielding plates 6A to 6D are provided in the space portion of the corner portion and the space portion between the butted ends where no is disposed, respectively.
For example, as shown in FIG. 3, it is incorporated in a ceiling-mounted air conditioner.

In FIG. 3, reference numeral 12 denotes a cassette type main body casing of the ceiling-mounted air conditioner. The main body casing 12 is buried in the ceiling 14 such that an intake / outlet panel portion (lower surface side exterior panel portion) 24 is continuous with the ceiling 14 in a shape almost in the same plane.

The air inlet / outlet panel portion 24 of the main body casing 12 is provided with, for example, a rectangular air intake grille 15 at the center thereof.
5 and a pre-filter 7 and a bell mouth 9
Is provided. Further, the intake / outlet panel section 24
The air outlets 8, 8,... Having a predetermined width and having air outlet passages 8a, 8a,. The opening extends straight (in a straight line) in the direction.

With the above-described configuration, the inside of the main body casing 12 is circumferentially moved from the air suction grill 5 through the pre-filter 7 and the bell mouth 9 in the in-machine space in the machine direction.
After turning, an air passage 10 reaching the air outlets 8, 8,... Is formed. The above-described rectangular tubular air heat exchanger 1 extends vertically in the middle of the air passage 10 (in the center of the air space), and the top plate 12a of the main body casing 12 and the drain pan on the side of the intake / outlet panel 24. 25 is provided so as to be supported therebetween. A fan 1 is provided in a downstream area of the upstream passage of the air passage 10 which is divided into two passages, an upstream side and a downstream side, by the air heat exchanger 1.
1 is provided. The fan 11 is integrally connected to a motor shaft 11c of a fan motor 11b via a hub 11a. A fan mounting bracket 13 is provided on a lower surface side of a top plate portion 12a of the main body casing 12 via the fan motor 11b. Suspended.

Therefore, in the air conditioner configured as described above, for example, when the fan 11 is operated to perform the cooling or heating operation, the operation of the fan 11 causes the air suction grill 15 to Ventilation path 1 in space
0 passes through the fan 11 via the pre-filter 7 and the bell mouth 9, penetrates the air heat exchanger 1 outward in four directions, and the flat heat transfer tubes 2, 2.
After the heat is effectively exchanged with the refrigerant flowing through the air outlets, the air outlet passages 8a, 8a of the air outlets 8, 8,.
The air is blown out again in a predetermined direction in the room through the wind direction plates 38, 38,... As clean cold air or warm air (see the arrow portion in FIG. 3).

As described above, in the air heat exchanger according to the embodiment of the present invention, the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,. The air heat exchanger 1 is formed by bending into a predetermined shape, and the corrugated fins 4 and the flat heat transfer tubes 2, 2,... Are not provided in the bent portions 5A to 5C. Has become.

Therefore, the portions 5A to 5B to be bent are formed.
Since the rigidity of C becomes low and only the upper and lower headers 3A and 3B need to be bent, the air heat exchanger 1 can be easily bent. Further, since the bent portions 5A to 5C, which become corner portions after forming, are places where the amount of airflow which is originally hard to contribute to heat exchange is small, the flat heat transfer tubes 2, 2,... And the corrugated fins 4, 4,.・ ・ It is possible to secure sufficient heat exchange performance even without.

In the air heat exchanger, the bent portions 5A to 5C are provided with shielding plates 6A, 6B and 6C.

Therefore, the above-mentioned structure facilitates the bending of the air heat exchanger, and the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,.
By reliably shielding the space portion where the space has been eliminated by the shielding plates 6A, 6B, and 6C, the passage of air in the space portion after being incorporated into the air conditioner is prevented, and the corrugated fins 4, 4,.・ 、 Flat tubes 2,2 ・ ・
・ Promote the effective flow of air to the part to prevent the heat exchange performance from deteriorating.

In the air heat exchanger, the corrugated fins 4, 4..., The flat heat transfer tubes 2, 2,..., And the upper and lower headers 3A, 3B are each made of aluminum.

Therefore, with this configuration, compared to an air heat exchanger made of another material, light weight, easy processing, and efficient heat exchange are achieved. It is also cheaper than copper.

Further, in the air heat exchanger, as described above, the air heat exchanger 1 is configured as a refrigerant / air heat exchanger for an air conditioner.

Therefore, with the above configuration, it is possible to provide a refrigerant / air heat exchanger which is easy to mold, has high heat exchange performance, is lightweight and inexpensive, and is particularly suitable for an air conditioner.

(Embodiment 2) Next, FIGS. 4 and 5 show the structure of an air heat exchanger according to Embodiment 2 of the present invention.

The air heat exchanger 1 of this embodiment has, as shown in FIG. 4, for example, two bent parts 5A, 5B one less than that of the above-described first embodiment, and is similar to the above. Parallel and straight pipe-shaped upper and lower headers 3
.. And the corrugated fins 4, 4,... Are alternately arranged between A, 3B except for the bent parts 5A, 5B. By bending and forming shielding plates 6A and 6B in the spaces of the bent portions 5A and 5B, respectively,
For example, it is formed in a U-shaped air heat exchanger 1 as shown in FIG.

As described above, in the air heat exchanger according to the embodiment of the present invention, the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,. The air heat exchanger 1 is formed by bending into a predetermined shape, and the corrugated fins 4 and the flat heat transfer tubes 2, 2,... Are not provided in the bent portions 5A, 5B. Has become.

Therefore, the bent portions 5A, 5A
Since the rigidity of B is reduced and only the upper and lower headers 3A and 3B need to be bent, the bending of the air heat exchanger 1 becomes easy. Since the bent portions 5A and 5B, which become corner portions after forming, are places where the amount of air flow that is originally difficult to contribute to heat exchange is small, the flat heat transfer tubes 2, 2... And the corrugated fins 4, 4,.・ ・ It is possible to secure sufficient heat exchange performance even without.

In the air heat exchanger, the bent portions 5A and 5B are provided with shielding plates 6A and 6B.

Therefore, the above-mentioned structure facilitates the bending of the air heat exchanger, and the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,.
By reliably shielding the space portion where the air has disappeared by the shielding plates 6A and 6B, the passage of air in the space portion after being incorporated into the air conditioner is prevented, and the corrugated fins 4, 4. The effective amount of air passing through the flat heat transfer tubes 2, 2,... Is promoted to prevent a decrease in heat exchange performance.

In the air heat exchanger, the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,..., And the upper and lower headers 3A, 3B are each made of aluminum.

Therefore, with this configuration, compared to an air heat exchanger made of another material, light weight, easy processing, and efficient heat exchange are achieved. It is also cheaper than copper.

Further, in the air heat exchanger, as described above, the air heat exchanger 1 is configured as a refrigerant / air heat exchanger for an air conditioner.

Therefore, with the above configuration, it is possible to provide a refrigerant / air heat exchanger that is easy to mold, has high heat exchange performance, is lightweight and inexpensive, and is particularly suitable for an air conditioner.

(Embodiment 3) FIGS. 6 to 8 show the structure of an air heat exchanger according to Embodiment 3 of the present invention.

The air heat exchanger 1 of this embodiment has, for example, one bent portion 5A as shown in FIG.
, And the corrugated fins 4, 4,... Are arranged between the A and 3B except for the bent portion 5A, and then the bent portion 5A is bent and formed. Further, by providing a shielding plate 6A in a space portion of the bent portion 5A, for example, a U-shaped air heat exchanger 1 as shown in FIGS. 7 and 8 is formed.

As described above, in the air heat exchanger according to the embodiment of the present invention, the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,. The air heat exchanger 1 is bent into a predetermined shape and has a structure in which the corrugated fins 4, the flat heat transfer tubes 2, 2,... Are not provided in the bent portion 5A. I have.

Therefore, the rigidity of the portion 5A to be bent becomes low, and only the upper and lower headers 3A and 3B need to be bent, so that the air heat exchanger 1 can be bent easily. Further, since the bent portion 5A which becomes a corner portion after forming is a place where the amount of air flow which is originally difficult to contribute to heat exchange is small, the flat heat transfer tubes 2, 2,... And the corrugated fins 4, 4,. Even without this, sufficient heat exchange performance can be ensured.

The air heat exchanger has a structure in which a shielding plate 6A is provided on the bent portion 5A.

Therefore, the above-mentioned structure facilitates the bending of the air heat exchanger, and the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,.
By reliably shielding the space portion where the space has been eliminated by the shielding plate 6A, the passage of air in the space portion after being incorporated into the air conditioner is prevented, and the corrugated fins 4, 4. The effective amount of air passing through the heat tubes 2, 2,... Is promoted to prevent a decrease in heat exchange performance.

In the air heat exchanger, the corrugated fins 4, 4,..., The flat heat transfer tubes 2, 2,..., And the upper and lower headers 3A, 3B are each made of aluminum.

Therefore, with this configuration, compared to an air heat exchanger made of another material, light weight, easy processing, and efficient heat exchange are achieved. It is also cheaper than copper.

Further, in the air heat exchanger, as described above, the air heat exchanger 1 is configured as a refrigerant / air heat exchanger for an air conditioner.

Therefore, with the above configuration, it is possible to provide a refrigerant / air heat exchanger which is easy to mold, has high heat exchange performance, is lightweight and inexpensive, and is particularly suitable for an air conditioner.

[Brief description of the drawings]

FIG. 1 is a front view of an air heat exchanger according to Embodiment 1 of the present invention before bending.

FIG. 2 is a perspective view of the air heat exchanger of FIG. 1 after bending.

FIG. 3 is a sectional view of an air conditioner incorporating the air heat exchanger of FIG.

FIG. 4 is a front view of an air heat exchanger according to Embodiment 2 of the present invention before bending.

5 is a plan view of the air heat exchanger of FIG. 4 after bending.

FIG. 6 is a front view of an air heat exchanger according to Embodiment 3 of the present invention before bending.

FIG. 7 is a front view of the air heat exchanger of FIG. 6 after bending.

FIG. 8 is a plan view of the air heat exchanger of FIG. 6 after bending.

FIG. 9 is a front view of a conventional air heat exchanger including a header, corrugated fins, and flat heat transfer tubes.

FIG. 10 is a partially cut perspective view of a flat heat transfer tube of the air heat exchanger.

FIG. 11 is an enlarged perspective view of a corrugated fin portion of the air heat exchanger.

FIG. 12 is a front view of an air heat exchanger before bending when an air heat exchanger for an air conditioner is bent by adopting a conventional air heat exchanger structure.

FIG. 13 is a perspective view of an air heat exchanger for an air conditioner formed with the conventional air heat exchanger.

[Explanation of symbols]

1 is an air heat exchanger, 2 is a flat heat transfer tube, 3A is an upper header, 3B is a lower header, 4 is a corrugated fin, 5A,
5B and 5C are bending portions, 6A, 6B, 6C and 6D are shielding plates, and A, B and C are bending central portions.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Junichi Shiramizu 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries, Ltd. Sakai Seisakusho Kanaoka Plant F-term (reference) 3L051 BE04 BE07 3L065 BA11

Claims (4)

[Claims] 1. Corrugated fins (4), (4)...
・, Flat heat transfer tubes (2), (2) ..., header (3
A) and (3A) are combined to form an air heat exchanger (1) which is bent into a predetermined shape, and the bent portions (A) to (C) are provided with the corrugated fins (4). ),
(4) An air heat exchanger characterized in that the flat heat transfer tubes (2), (2), ... are not provided. 2. The air heat exchanger according to claim 1, wherein the bent portions (A) to (C) are provided with shielding plates (6A) to (6C). 3. Corrugated fins (4), (4)...
・, Flat heat transfer tubes (2), (2) ..., header (3
3. The air heat exchanger according to claim 1, wherein each of A) and (3B) is made of aluminum. 4. The air heat exchanger (1) is a refrigerant / air heat exchanger for an air conditioner.
4. The air heat exchanger according to 2 or 3.