JPH08247681A - Heat exchanger - Google Patents

Abstract

PURPOSE: To attain reduction of the size and improvement of the efficiency of heat exchange by a construction wherein divided unit heat exchangers are arranged in a plurality of rows in the direction of a heat exchange air flow and the unit heat exchangers in the leeward-side row are opposed to those in the windward-side row so that the respective end parts thereof overlap each other in the direction of the air flow. CONSTITUTION: A large number of strip-shaped fins (f) are juxtaposed with a narrow gap left between and heat exchange pipes (p) piercing the fins are arranged in one row along the longitudinal direction (vertical direction) of the fins (f). In the vertical direction thereof, a plurality of divided unit heat exchangers N are arranged in two rows along the direction of sending heat exchange air of a blower. These unit heat exchangers N in a plurality are aligned in straight lines in the windward-side row WU an the leeward-side row WD and disposed in a state wherein the respective upper and lower end parts thereof are made to overlap each other in the direction of an air flow. Accordingly, the same dimensions as those in the case when the heat exchange pipes are arranged in two rows are obtained and reduction of the size by lowering the height is attained, while the efficiency of heat exchange can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used in, for example, an air conditioner.

[0002]

2. Description of the Related Art A commonly used air conditioner is divided into an indoor unit and an outdoor unit, and a refrigerant pipe, a power cord and the like are connected between these units. A heat exchanger is housed and arranged in each unit. In the heat exchanger used here, a large number of fins are arranged side by side with a narrow gap, and a heat exchange pipe is penetrated through these fins.

By the way, there is a great demand for downsizing not only the indoor unit but also the outdoor unit. The most important factor in miniaturizing these units is the miniaturization of the heat exchanger. That is, if the heat exchanger can be downsized, the unit can be downsized.

[0004]

In the heat exchanger, first, the strip-shaped fins are provided with the heat exchange pipes in parallel in one row,
The total length of the fins has been shortened to reduce the height and achieve a smaller size. However, in this case, the heat exchange capacity is insufficient and a predetermined heat exchange capacity cannot be obtained.

Therefore, heat exchange pipes are arranged in two rows in parallel in the width direction of the fins to secure a sufficient heat exchange capacity, and to reduce the height and size. In this case, the air that has passed through the heat exchange pipes in the first row and has undergone heat exchange will pass through the heat exchange pipes in the second row as it is, and the heat exchange efficiency will decrease in the second row.

That is, even if two heat exchange pipes are arranged side by side, the heat exchange efficiency is not improved. In order to compensate for this, there is no choice but to increase the heat exchange area, and as a result, it is impossible to promote miniaturization of this heat exchanger.

The present invention has been made based on the above circumstances, and an object of the present invention is to achieve the same size as the arrangement of the heat exchange pipes in two rows to achieve a height reduction and a size reduction. At the same time, the present invention intends to provide a heat exchanger that ensures the heat exchange action in the second row of heat exchange pipes and improves the heat exchange efficiency.

[0008]

In order to achieve the above object, the heat exchanger of the present invention has a plurality of rectangular fins arranged side by side with a narrow gap, as claimed in claim 1. In a heat exchanger having a fin through which a heat exchange pipe penetrates, the heat exchanger is divided into a plurality of pieces, and the divided unit heat exchangers are arranged in a plurality of rows in the heat exchange air flow direction. The unit heat exchangers on the leeward side of the unit heat exchangers on the leeward side face each other so that their ends overlap with each other in the air flow direction.

As a second aspect, the length dimension of the overlapping end portion of the unit heat exchangers in the leeward row with respect to the unit heat exchangers in the leeward row according to claim 1 is approximately one diameter of the heat exchange pipe. Is equal to.

Claims 1 and 2 are defined as Claim 3.
The overlapping end portions of the unit heat exchangers in the leeward side row with respect to the unit heat exchangers in the upwind side row according to any one of the above, the fins are partially bent, and a wind direction guide portion that guides the heat exchange air. It is characterized by

Claims 1 and 2 are defined as Claim 4.
The overlapping end portions of the unit heat exchangers in the leeward side row with respect to the unit heat exchangers in the upwind side row according to any one of the above, the fins are partially bent, and a wind direction guide portion that guides the heat exchange air. In addition, the fins of the wind direction guide portions are in line contact with each other.

Claims 3 and 4 are as claim 5.
The overlapping end portions of the unit heat exchangers in the leeward row with respect to the unit heat exchangers in the leeward row described above include a cutout portion in which fins are partially cutout, and a wind direction guide portion that is bent at an angle of 45 ° or less. It is characterized by having and.

According to a sixth aspect of the present invention, the wind direction guide portion according to the third aspect is provided in at least one of the unit heat exchanger in the windward row and the unit heat exchanger in the leeward row. .

Claims 1 and 2 are defined as Claim 7.
The overlapping end portions of the unit heat exchangers in the windward row or the unit heat exchangers in the leeward row are notched at opposite corners, and the unit heat exchangers are in surface contact with each other. It is characterized by

Claims 1 and 2 are defined as claim 8.
Any of the unit heat exchangers in the leeward row and the unit heat exchangers in the leeward row are separated from each other by a predetermined distance dimension s2.

As a ninth aspect, the predetermined distance dimension s2 between the overlapping ends of the unit heat exchangers in the leeward row with respect to the unit heat exchangers in the leeward row is the diameter dimension PD of the heat exchange pipe. It is characterized by the following settings.

[0017]

Since the heat exchanger is divided into a plurality of parts and arranged in a plurality of rows for the heat exchange air flow, the end portions of the unit heat exchangers in the windward row and the unit heat exchangers in the leeward row are overlapped with each other. Aside from the sufficient heat exchange effect in the first row unit heat exchanger, fresh air is also effectively introduced to the entire surface of the second row unit heat exchanger to ensure effective heat exchange. Act.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings by applying it to a heat exchanger provided in an outdoor unit of an air conditioner, for example. 1 and 2 show an outdoor unit of an air conditioner. The unit main body 1 has a rectangular shape in both side view and plan view. A bell mouth 2 is provided on one side wall of the unit body 1. The air guide opening 3 is provided over the side wall facing the side wall and the side wall of the surface orthogonal to the side wall.

A blower 4 is arranged in the unit body 1. The blower 4 is composed of a fan motor 5 and a blower fan 6 fitted on the rotation shaft of the fan motor 5.

The fan motor 5 of the blower 4 is supported by the top plate 1a and the bottom plate 1b of the unit body 1 via the support legs 7. The blower fan 6 faces the bell mouth 2. And the unit body 1 facing the bell mouth 2
A fan guard 8 is attached to the side wall.

As the blower 4 is driven, outside air is introduced into the unit body 1 from the air guide opening 3 as shown by an arrow in the figure, and the bell mouth is passed through a heat exchanger 10 described later. It concentrates on 2 and blows out from here.

The heat exchanger 10 is arranged between the blower 4 and the air guide opening 3. Further, the heat exchanger 10 and the blower 4 are arranged on one side of the partition plate 11 (particularly shown in FIG. 2) that partitions the inside of the unit main body 1 into right and left.

The other side of the partition plate 11 is a compressor chamber 12 formed in the unit main body 1, in which a compressor 13 is arranged. The compressor 13 and the heat exchanger 10 are connected via a refrigerant pipe (not shown).

The outdoor unit is thus constructed,
An air conditioner is configured by being connected to an indoor unit (not shown) via a refrigerant pipe or electric wiring. Next, the heat exchanger 10 will be described with reference to FIGS. 1 to 3.

In the heat exchanger 10, a large number of strip-shaped fins f are arranged side by side with a narrow gap, and a heat exchange pipe p penetrates through these fins f. They are arranged in a row along the longitudinal direction (up-down direction) of f.

The heat exchanger 10 is formed in an L shape in a plan view, and is divided into a plurality of pieces in the vertical direction, and the individual heat exchangers N (hereinafter referred to as unit heat exchangers) are divided. ) Are arranged in two rows along the heat exchange air blowing direction of the blower 4.

In each of the unit heat exchangers N, an even number of heat exchange pipes p are penetrated so that four heat exchange pipes p penetrate one unit here, and as a result, heat exchange of a single unit is performed. The vessel N can be configured only by a heat exchange pipe that is folded back and folded, that is, a so-called U pipe, and does not require a straight pipe, so that the number of parts can be reduced.

Such a plurality of unit heat exchangers N ... Are arranged in series in the windward row WU and the leeward row WD, and are arranged with their upper and lower ends superposed in the air flow direction. It In addition, if explaining, the unit heat exchanger N of the windward row WU
On the other hand, the unit heat exchangers N in the leeward side row WD are arranged in a staggered manner. Therefore, the unit heat exchangers N in the leeward row WD are located so as to face the air gap positions between the unit heat exchangers N in the leeward row WU.

Then, the upper end a and the lower end b of the unit heat exchanger N of the windward row WU and the lower end b and the upper end a of the unit heat exchanger N of the leeward row WD are arranged in the horizontal direction (air flow). Direction) opposite.

In practice, the unit heat exchanger N of the windward row WU
Unit heat exchanger N of upper end a (lower end b) and leeward side row WD
The lower end portion b (upper end portion a) may be overlapped by the length of one heat exchange pipe p and the minimum length of the fin f required to penetrate the one heat exchange pipe p.

In each unit heat exchanger N, when the unit heat exchanger N is divided, the uppermost heat exchange pipe p and fin f
The distance from the uppermost end and the distance between the lowermost heat exchange pipe p and the lowermost end of the fin f are set to 1/2 of the pipe pitch of the heat exchange pipe p.

However, in this state, the wind direction guide portions 15 to be described later, which are provided at the end portions of the mutual unit heat exchangers N, are too large to be necessary, which rather hinders the smooth guide of the heat exchange air, and leeward. Since the heat exchange air is not guided to the end portion of the unit heat exchanger N of the side row WD, the heat exchange performance is deteriorated, and ventilation noise may occur. Therefore, the end portion of the unit heat exchanger N is set here. Specified size c1 from the specified position
Just delete.

Further, the upper and lower end portions a and b of the unit heat exchanger N in which the windward and leeward side rows WU and WD overlap each other are obliquely bent to form a wind direction guide portion 15. Regarding the bending position of the wind direction guide portion 15, the line connecting the heat exchange pipes p, p of the overlapping unit heat exchangers N in the horizontal direction is one bending end, and the other bending end is the width of the fin f. The position is about half the size. Therefore, the tilt angle θ
Becomes a fold line to form a triangular fold.

As shown in FIG. 4, all the fins f constituting each unit heat exchanger N are bent at the same corner portions in the same direction to obtain the wind direction guide portion 15. Then, the blower 4 is driven along with the refrigeration cycle operation, and the heat exchange air is basically guided in the direction orthogonal to the longitudinal direction of the unit heat exchanger N.

The unit heat exchangers N of the windward row WU ... The heat exchange air that is directly introduced exchanges heat with these unit heat exchangers.
The heat exchange air directly guided to the unit heat exchangers N ... Of the leeward side row WD effectively exchanges heat with the entire surfaces of these unit heat exchangers.

In particular, on the windward row WU unit heat exchanger N,
The heat exchange air guided to the lower end portions a and b is below the upper end portions b and a of the leeward row WD unit heat exchanger N that is superposed on the heat exchange air.
Be guided to the outside of.

That is, the wind direction guiding portions 15 at the upper and lower end portions a and b of the windward row WU unit heat exchanger N and the wind direction guiding portions at the lower and upper end portions b and a of the leeward row WD unit heat exchanger N. A series of wind direction guide portions from where 15 contact each other, the air that has been heat-exchanged in the windward row WU unit heat exchanger N does not flow into the leeward row WD heat exchanger N, and is also leeward. Fresh air that is not heat-exchanged in the windward row WU heat exchanger N flows into the air flowing into the side row WD unit heat exchanger N, which contributes to improvement in heat exchange efficiency.

After all, the heat exchange air guided into the unit body 1 from the air guide opening 3 of the outdoor unit is efficiently and efficiently irrespective of the windward and leeward side rows WU and WD. Is heat-exchanged with and is blown out of the unit main body 1 through the bell mouth 2.

Substantially, the unit heat exchangers N are arranged in two rows, but different from the heat exchange air introduced to the unit heat exchangers N in the first windward row WU. Fresh heat exchange air can be introduced to the unit heat exchanger N in the leeward side row WD, which is the second row, and a sufficient heat exchange action can be obtained.

In addition, the upper and lower ends of the fin f have a predetermined dimension c
Wind direction guide 1 with only 1 deleted and bent at an angle
Since 5 is provided symmetrically on the windward side and the leeward side, the windward row W
The heat exchange air from the unit heat exchanger N of U can be guided to the space portion of the leeward side row WD while the ventilation resistance is small, and the heat exchange air from the space portion of the upwind side row WU can be guided to the leeward side row WD. The unit heat exchanger N can be smoothly guided to the upper and lower ends.

This makes it possible to reduce the heat exchanger capacity while maintaining the same height and heat exchange capacity as the two-row heat exchanger,
Manufacturing cost can be reduced. Since the fins f are bent to form the airflow direction guide portion 15, it is possible to reduce the size in the airflow direction as compared with the case where a guide portion or the like of another member is used.

A unit heat exchanger as shown below may be used. The unit heat exchanger Na shown in FIG. 5 (A) is basically composed of a large number of fins f and heat exchange pipes p, as in the case described above.

Here, the upper and lower end portions of the fin f are deleted by c1, but the deleted portion is approximately 1/2 of the width dimension of the fin from the windward side in the unit heat exchanger Na of the windward row WU. In the unit heat exchanger Na on the leeward side, the unit heat exchanger Na is provided from the leeward side by about half the width of the fin.

The respective tip portions are obliquely removed, and the overlapping portions are bent in a triangular shape to provide a wind direction guide portion 15A. This wind direction guide 1
The bending angle θ1 of 5A is preferably 45 ° or less.

With such a structure, the wind direction guide portion 15
A effectively guides heat exchange air to the heat exchange pipes p, p at the overlapping ends, and contributes to further improvement of heat exchange efficiency as a heat exchanger.

A unit heat exchanger Nb as shown in FIG. 6B and FIG. 6 may be adopted. At the ends of the unit heat exchangers Nb, Nb where the leeward row WU and the leeward row WD overlap with each other, the fins f constituting the unit heat exchanger are provided with notches 16 cut out in a triangular shape.

The notch 16 is provided on the side where the unit heat exchangers Nb overlap each other, and the width dimension of the fin f is almost the same.
The width dimension is 1/2 and the depth dimension is such that a space for one heat exchange pipe is left between adjacent heat exchange pipes p.

In other words, the overlapping ends of the unit heat exchangers Nb in this case are in surface contact with each other by an area corresponding to one heat exchange pipe. And the windward row WU
In the unit heat exchanger Nb, the heat exchange air flowing along the uppermost and lowermost heat exchange pipes p is the leeward side row WD.
The unit heat exchanger Nb is guided along the cutout surface of the cutout portion 16.

This is because the ventilation resistance of the cutout portion 16 is smaller than that of the portion where the other fins exist, and the heat exchange air along the cutout surface of the cutout portion 16 has a portion where no ventilation resistance exists. Since it is guided, a large amount of heat exchange air is introduced and the heat exchange efficiency of the unit heat exchanger Nb of the windward row WU is improved.

Further, the heat exchange air guided through the notch surface of the notch 16 provided in the unit heat exchanger Nb of the leeward row WU is smoothly guided to the heat exchanger Nb of the leeward row, A large amount of heat exchange air is introduced to improve the heat exchange efficiency of this unit heat exchanger.

Then, the unit heat exchanger Nb of the windward row WU
And the unit heat exchanger Nb of the leeward side row WD are in surface contact with each other, and there is also heat exchange air guided along this contact portion,
A reliable heat exchange action is performed and heat exchange efficiency is improved.

After all, all the conditions lead to the improvement of the heat exchange efficiency, and since the heat exchange air is not forcibly guided in the wind direction, the wind noise is also reduced. A unit heat exchanger Nc as shown in FIG. 7 may be used.

Basically, each unit heat exchanger Nc is basically provided with a large number of rectangular fins f at predetermined intervals, and the heat exchange pipe p is provided therethrough. Both the unit heat exchangers Nc of the windward row WU and the unit heat exchangers Nc of the leeward row WD arranged in a staggered manner have the upper and lower ends of the fins f at the overlapping positions removed by a predetermined dimension c1. Is the same.

Further, each unit heat exchanger Nc is formed by bending only the upper end portion thereof and serves as an airflow direction guide portion 15B. Here, the wind direction guide portion 15 is formed by bending both the unit heat exchangers Nc of the windward and leeward rows WU and WD.
Although B is provided, it is not limited to this and may be provided only in the unit heat exchanger in any one row.

With such a configuration, the unit heat exchanger Nc can be downsized by removing the upper and lower ends of the fin f, and the heat exchange efficiency can be improved by providing the wind direction guide portion 15B. Since only the upper end is bent,
The number of processing steps is smaller than that of bending the lower end, and the manufacturability is improved.

A unit heat exchanger Nd as shown in FIG. 8 may be adopted. In each unit heat exchanger Nd, basically, a large number of rectangular fins f are provided at a predetermined interval, and the heat exchange pipe p is provided therethrough.

The unit heat exchangers Nd on the leeward side WU and the leeward side WD arranged in a staggered manner have their upper and lower ends overlapping each other. The unit heat exchangers are aligned at positions separated by a predetermined dimension s2.

It is desirable that the clearance dimension s2 of the clearance S be smaller than the diameter PD of the heat exchange pipe p (s2 <PD). With such a configuration, basically, a part of the heat exchange air guided along the direction perpendicular to the longitudinal direction of the unit heat exchanger Nd is a unit on the windward and leeward side WU, WD. It is attracted to the gap S formed between the heat exchangers Nd, Nd and guided smoothly.

That is, the heat exchange air is introduced into these gaps S and comes into contact with the unit heat exchangers Nd, Nd on the windward and leeward row sides WU, WD, and a sufficient heat exchange action is obtained. Further, by setting the above-mentioned clearance S, heat exchange air is surely guided also to the heat exchange pipe p in the unit heat exchanger Nd on the leeward row side WD which is originally at the overlapping position, as if the airflow direction guide portion were provided. Therefore, a sufficient heat exchange action is performed.

Here, the air flowing through the gap S is
Since it has a certain wind speed, it is guided to the unit heat exchanger Nd as shown by the arrow Fa in the figure and is not guided to the unit heat exchanger Nd as shown by the arrow Fb in the figure, so there is almost no flow passing through the gap S. do not do.

A unit heat exchanger N as shown in FIG.
You may employ e. In each unit heat exchanger Ne, basically, a large number of rectangular fins f are provided at a predetermined interval, and the heat exchange pipes p are provided therethrough.

The unit heat exchangers Ne on the windward row side WU and the leeward row side WD arranged in a staggered manner have their upper and lower end portions overlapping each other. The unit heat exchangers are aligned at positions separated by a predetermined dimension s2.

It is desirable that the clearance dimension s2 of the clearance S be smaller than the diameter PD of the heat exchange pipe p (s2 <PD). Here, at the overlapping end portions of each unit heat exchanger Ne, the opposing corner portions are obliquely cut.
That is, the notch 17 is provided by omitting the corner on the gap side.

With such a configuration, basically, a part of the heat exchange air guided along the direction perpendicular to the longitudinal direction of the unit heat exchanger Ne is located at the windward and leeward row side WU. WD
The unit heat exchanger Nd is guided along the cutout portion 17.

That is, the heat exchange air is guided along the cutout surface of the cutout portion 17 of the unit heat exchanger Ne on the windward side WU,
The gap S is reached. Then, from this gap S to the leeward row side W
The heat exchange air is guided along the cutout surface of the cutout portion 17 of the unit heat exchanger Ne of D, and the heat exchange air flows very smoothly, so that the heat exchange efficiency can be further improved.

A unit heat exchanger N as shown in FIG.
You may employ f. In each unit heat exchanger Ne, basically, a large number of rectangular fins f are provided at a predetermined interval, and the heat exchange pipe p is provided therethrough.

The unit heat exchangers Nf of the windward row side WU and the leeward row side WD, which are arranged in a staggered manner, have their upper and lower end portions overlapping each other. The unit heat exchangers are aligned at positions separated by a predetermined dimension s2.

The clearance dimension s2 of the clearance S is preferably smaller than the diameter PD of the heat exchange pipe p (s2 <PD). The opposite corners are obliquely bent at the ends of the unit heat exchangers Nf that overlap with each other through the gap S, thereby forming the wind direction guide portion 15C.

With such a structure, basically, a part of the heat exchange air guided along the direction perpendicular to the longitudinal direction of the unit heat exchanger Nf is part of the windward and leeward row side WU. WD
The unit heat exchanger Nf is attracted to the gap S formed between the unit heat exchangers Nf and smoothly guided.

Since the wind direction guide portions 15C, 15C which are obliquely bent through the gap S are provided, the heat exchange air is directed to the wind direction guide portion 15C of the unit heat exchanger Nf on the windward side WU. Is guided along and reaches the gap S.

The gap S is guided along the wind direction guide portion 15C of the unit heat exchanger Nf on the leeward row side WD, the heat exchange air circulates extremely smoothly, and the heat exchange efficiency can be further improved.

It is needless to say that the heat exchanger of the present invention is not limited to use for mounting an outdoor unit. The present invention can be variously modified without departing from the scope of the invention.

[0073]

As described above, the present invention provides claim 1.
In, the heat exchanger is divided into a plurality, and arranged in a plurality of rows with respect to the heat exchange air flow direction, since the end portions of the unit heat exchangers of the windward row and the leeward row are opposed to each other,
The size of the heat exchange pipes is the same as that of the two rows, and the size of the heat exchange pipes is reduced, and the heat exchange action in the second row heat exchange pipes is ensured to improve the heat exchange efficiency. There is an effect that improvement can be obtained.

In claim 2, since the lengths of the overlapping end portions of the unit heat exchangers of the windward row and the leeward row are set to be equal to about one diameter of the heat exchange pipe, the heat exchangers are more heat exchangers. It is possible to smoothly guide the heat exchange air to the second-row unit heat exchanger while achieving the height reduction, and improve the heat exchange efficiency.

In the third aspect, since the overlapping end portions of the unit heat exchangers of the windward row and the leeward row are wind direction guide portions in which fins are partially bent, heat exchange air is sufficiently supplied to the heat exchange pipes. To improve the heat exchange efficiency.

In claim 4, the overlapping end portions of the unit heat exchangers of the windward row and the leeward row are wind direction guide portions in which fins are partially bent, and the wind direction guide portions are in contact with each other. While guiding the exchanged air to the heat exchange pipe sufficiently, guide the heat exchanged air through the contacting heat exchanger part,
It contributes to the improvement of heat exchange efficiency.

In claim 5, the overlapping end portions of the unit heat exchangers of the windward row and the leeward row have a notched portion where the fins are partially notched and a wind direction guide portion which is bent at an angle of 45 ° or less. The heat exchange air is efficiently guided by the synergistic effect of the cutout portion and the wind direction guide portion, and the heat exchange capacity is improved.

In the sixth aspect, the wind direction guide portion is a unit heat exchanger in the windward row or a unit heat exchanger in the leeward row.
Since it is provided in at least one of them, the heat exchange air can be reliably guided.

In the seventh aspect, the overlapping end portions of the unit heat exchangers in the leeward side row and the leeward side row are cut out at the opposite corners, and the unit heat exchangers are in surface contact with each other. Heat exchange air can be efficiently guided by the synergistic effect of surface contact.

In claim 8, since the overlapping end portions of the unit heat exchangers of the windward row and the leeward row are separated from each other by a predetermined distance dimension s2, a heat exchange air attracting action is generated in the gap portion.
Heat exchange air can be efficiently guided.

In the ninth aspect, the predetermined distance dimension s2 between the overlapping ends of the unit heat exchangers in the leeward row and the leeward row is:
Since the diameter is set to be equal to or smaller than the diameter dimension PD of the heat exchange pipe, the setting of the gap is ideal, and the generation of raw air passing only through the gap can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of an air conditioner outdoor unit including a heat exchanger according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional plan view of the outdoor unit of the embodiment.

FIG. 3 is a partial vertical cross-sectional view of the heat exchanger of the same embodiment.

FIG. 4 is a partial perspective view of a unit heat exchanger of the same embodiment.

FIG. 5A is a partial vertical cross-sectional view of a heat exchanger of another embodiment. (B) is a partial longitudinal cross-sectional view of a heat exchanger of still another embodiment.

FIG. 6 is a partial perspective view of a unit heat exchanger used in the embodiment of FIG. 5 (B).

FIG. 7 is a partial vertical cross-sectional view of a heat exchanger of still another embodiment.

FIG. 8 is a partial vertical cross-sectional view of a heat exchanger of still another embodiment.

FIG. 9A is a partial vertical cross-sectional view of a heat exchanger of still another embodiment. (B) is a partial longitudinal cross-sectional view of a heat exchanger of still another embodiment.

[Explanation of symbols]

f ... Fin, p ... Heat exchange pipe, N, Na to Ne ... Unit heat exchanger

Claims (9)

[Claims] 1. A heat exchanger comprising a large number of rectangular fins arranged side by side with a narrow gap, and a heat exchange pipe passing through the fins. The heat exchanger is divided into a plurality of parts. The divided unit heat exchangers are arranged in a plurality of rows with respect to the heat exchange air flow direction, and the unit heat exchangers in the leeward row and the unit heat exchangers in the leeward row are at the ends of each other. A heat exchanger characterized in that they are opposed to each other so as to overlap in the air flow direction. 2. The length dimension of the overlapping end portion of the unit heat exchangers in the leeward side row with respect to the unit heat exchangers in the leeward side row is substantially equal to one diameter of the heat exchange pipe. The heat exchanger according to item 1. 3. The fins are partially bent at the overlapping end portions of the unit heat exchangers in the leeward row with respect to the unit heat exchangers in the leeward row, and a wind direction guide portion for guiding heat exchange air is provided. The heat exchanger according to any one of claims 1 and 2, characterized in that. 4. The overlapping end portions of the unit heat exchangers in the leeward row with respect to the unit heat exchangers in the leeward row form a wind direction guide portion for guiding heat exchange air by partially bending fins, The heat exchanger according to claim 1, wherein the fins of the wind direction guide portions are in line contact with each other. 5. The overlapping end portions of the unit heat exchangers in the leeward row with respect to the unit heat exchangers in the leeward row are bent at an angle of 45 ° or less with a cutout portion where a fin is partially cut out. 4. A wind direction guide section is provided.
And the heat exchanger according to claim 4. 6. The heat exchanger according to claim 3, wherein the wind direction guide portion is provided in at least one of a unit heat exchanger in a windward row and a unit heat exchanger in a leeward row. . 7. The overlapping end portions of the unit heat exchangers in the windward row or the unit heat exchangers in the leeward row are cut at opposite corners, and the unit heat exchangers are in surface contact with each other. The heat exchanger according to claim 1, wherein the heat exchanger is a heat exchanger. 8. The unit heat exchanger in the leeward row is separated from the overlapping end portions of the unit heat exchanger in the leeward row by a predetermined distance dimension s2. The heat exchanger according to any one. 9. The predetermined distance dimension s between the overlapping ends of the unit heat exchangers in the leeward row with respect to the unit heat exchangers in the leeward row.
9. The heat exchanger according to claim 8, wherein 2 is set to be equal to or smaller than the diameter dimension PD of the heat exchange pipe.