JP2002243381A - Air heat exchanger and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To specify a corrugated fin having a small contribution rate to a heat exchange capacity at the time of bending of a header, to enable prediction of a heat exchange capacity, and to improve a joint portion of a corrugated fin. Prevent the joint brazing of flat heat transfer tubes from breaking. SOLUTION: A large number of flat heat transfer tubes 2, 2... Are arranged side by side at a predetermined interval between a pair of headers 1A, 1B, and between these flat heat transfer tubes 2, 2. In the air heat exchanger having corrugated fins 3, 3,... Interposed so as to conduct heat, a selected one of the corrugated fins 3, 3,. When the cuts 6 are formed and the headers 1A and 1B are bent, the corrugated fins 3 'having the cuts 6 formed therein.
Of the corrugated fins 3, 3,... Are not buckled and deformed intensively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated air heat exchanger having flat heat transfer tubes and corrugated fins, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Recently, it has been studied to adopt a laminated air heat exchanger having flat heat transfer tubes and corrugated fins, for example, as a heat exchanger for an air conditioner.

As shown in FIG. 13, an air heat exchanger provided with such flat heat transfer tubes and corrugated fins has a pair of pipe-shaped headers 1A and 1B through which a refrigerant is introduced and discharged.
And a number of flat heat transfer tubes 2, 2... Which are communicated between the headers 1A and 1B and are arranged side by side at predetermined intervals in the longitudinal direction thereof, and these flat heat transfer tubes 2, 2. ..Interposed in a state of being continuously bent in a substantially S-shape between the flat heat transfer tubes 2 and 2 corresponding to the outer ends of the bent surfaces so as to be able to conduct heat. It consists of corrugated fins 3, 3 ... heat-sealed. Reference numerals 4 and 5 are external refrigerant pipes.

[0004]

By the way, when the air heat exchanger having the above structure is to be used as, for example, an evaporator or a condenser of an air conditioner, from the viewpoint of achieving both heat exchange capacity and compactness. For example, as shown in FIG.
It is often desirable that the headers 1A and 1B be bent to have a curved shape.

However, the flat heat transfer tubes 2, 2,... Are arranged side by side at equal intervals in parallel, and corrugated fins 3, 3,. When 1A and 1B are bent, the bending does not occur uniformly as a whole, but is locally bent. Then, in the bent portion, the interval between the flat heat transfer tubes 2, 2,... Is widened on the outer peripheral side and narrowed on the inner peripheral side.
3 will buckle as indicated by reference numeral 3 'in FIG.

However, the bending of the header 1
Since it is impossible to predict where in A and 1B the bent portion will be formed, the heat exchange ability cannot be predicted. Further, as shown in FIG. 15, the headers 1A, 1B and the flat heat transfer tubes 2, 2 are formed by bending the headers 1A, 1B.
······························································································ Further, as shown in FIG. 16, on the outer peripheral side of the flat heat transfer tubes 2, 2,..., The joint brazing portions of the corrugated fins 3, 3,. There is a risk.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to identify a corrugated fin having a small contribution rate to the heat exchange capacity at the time of bending a header so that the heat exchange capacity can be predicted. It is another object of the present invention to prevent the breakage of the joint portion of the corrugated fin and the joint brazing portion of the flat heat transfer tube.

[0008]

According to the first aspect of the present invention, as a means for solving the above problems, a pair of headers 1A and 1B into which a refrigerant is introduced and discharged, and the headers 1A and 1B are provided.
And a plurality of flat heat transfer tubes 2, 2,... Arranged in parallel with each other at a predetermined interval in the longitudinal direction thereof, and heat conduction between these flat heat transfer tubes 2, 2,. , The corrugated fins 3, 3.. Interposed as possible, and in the air heat exchanger formed by bending the headers 1A, 1B, the selected one of the corrugated fins 3, 3,. And a cut 6 in a direction orthogonal to the headers 1A and 1B.

With the above construction, when the headers 1A, 1B are bent, the corrugated fins 3 'with the cuts 6 are buckled intensively, and the other corrugated fins 3, 3,.・ No buckling deformation occurs. Therefore, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity. In addition, since buckling deformation occurs intensively at a specific corrugated fin 3 ', breakage of the joints of the other corrugated fins 3, 3,... And the brazed joints of the flat heat transfer tubes 2, 2,. be able to.

According to the second aspect of the present invention, as a means for solving the above-mentioned problems, a pair of headers 1A and 1B into which a refrigerant is introduced and discharged, and a communication state between the headers 1A and 1B and a longitudinal direction thereof. , And a plurality of flat heat transfer tubes 2, 2... Arranged side by side at a predetermined interval from each other, and corrugated fins 3 interposed between these flat heat transfer tubes 2, 2,. In the air heat exchanger formed by bending the headers 1A, 1B, the corrugated fins 3 selected from the flat heat transfer tubes 2, 2, ... are removed. .

With the above construction, when the headers 1A and 1B are bent, the distortion due to bending concentrates on the portion where the corrugated fin 3 is removed, and the remaining corrugated fins 3, 3. No buckling deformation occurs, and the heat exchange capacity can be predicted. Also, headers 1A, 1
Since a specific portion of B is bent and deformed, it is also possible to avoid destruction of the remaining joint portions of the corrugated fins 3, 3,... And the joint brazing portions of the flat heat transfer tubes 2, 2,.

According to a third aspect of the present invention, as a means for solving the above-mentioned problems, a pair of headers 1A and 1B through which a refrigerant is introduced and discharged, and a communication between the headers 1A and 1B and a longitudinal direction thereof. , And a plurality of flat heat transfer tubes 2, 2... Arranged side by side at a predetermined interval from each other, and corrugated fins 3 interposed between these flat heat transfer tubes 2, 2,. 3 consists of a .., the header 1A, the air heat exchanger formed by bending a 1B, the fin pitch P ₁ but chosen among the corrugated fins 3, 3 ..., greater than the others You have set.

[0013] By the structure described above, the header 1A, when bending the 1B, will be distorted by bending the small corrugated fins 3 'portion of the fin pitch P ₁ of strength is concentrated, the fin pitch P ₁ The corrugated fins 3 'are buckled, but the other corrugated fins 3, 3 are not buckled. Therefore, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity. Also,
Since buckling deformation occurs intensively at a specific corrugated fin 3 ', it is possible to avoid destruction of the joints of the other corrugated fins 3, 3 ... and the joint brazed portions of the flat heat transfer tubes 2, 2 ... it can.

According to a fourth aspect of the present invention, as a means for solving the above-mentioned problems, a pair of headers 1A and 1B through which a refrigerant is introduced and discharged, and a pair of headers 1A and 1B which are in communication with each other in the longitudinal direction. , And a plurality of flat heat transfer tubes 2, 2... Arranged side by side at a predetermined interval from each other, and corrugated fins 3 interposed between these flat heat transfer tubes 2, 2,. An air heat exchanger formed by bending the headers 1A and 1B.
At a predetermined position in A and 1B, a deformation accelerating means which is easily deformed during bending is formed.

With the above construction, when the headers 1A and 1B are bent, distortion due to bending concentrates on the portion where the deformation promoting means is formed, and the corrugated fin corresponding to the deformation promoting means is formed. 3 ',
3 ′, 3 ′ are buckled and the other corrugated fins 3, 3,... Are not buckled. Therefore, it is possible to predict the corrugated fin 3 'that causes buckling deformation, and it is possible to predict the heat exchange capacity. Also,
Since specific portions of the headers 1A and 1B are bent and deformed, it is possible to avoid destruction of the joints of the other corrugated fins 3 and 3 and the joint brazing portions of the flat heat transfer tubes 2 and 2. it can.

As in the invention of claim 5, claim 4
In the air heat exchanger described above, when the deformation accelerating means is constituted by a concave portion 7 formed on the inner peripheral side of the headers 1A and 1B, the concave portion 7 is formed at a selected portion of the headers 1A and 1B. Just by doing so, the deformation promoting means can be configured.

As in the invention of claim 6, claim 4
In the air heat exchanger described above, when the deformation promoting means is constituted by a cut 8 formed on the inner peripheral side of the headers 1A and 1B and closed after bending,
Deformation promoting means can be constituted only by forming cuts 8 which are closed after bending at selected portions A and 1B.

According to a seventh aspect of the present invention, as a method for solving the above-mentioned problem, a pair of headers 1A and 1B into which a refrigerant is introduced and discharged, and a communication between the headers 1A and 1B and a longitudinal direction thereof , And a plurality of flat heat transfer tubes 2, 2... Arranged side by side at a predetermined interval from each other, and corrugated fins 3 interposed between these flat heat transfer tubes 2, 2,. In forming the air heat exchanger composed of 3... Into a curved shape by bending the headers 1A and 1B, a selected one of the corrugated fins 3, 3. A cut 6 in a direction orthogonal to 1B is formed before bending the headers 1A and 1B.

With the above construction, when the headers 1A and 1B are bent, the corrugated fins 3 'in which the cuts 6 have been formed are buckled intensively, and the other corrugated fins 3 and 3 are bent. · · · No buckling deformation. Therefore, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity. Further, since buckling deformation occurs intensively at a specific corrugated fin 3 ', the joints of the other corrugated fins 3, 3 ... and the flat heat transfer tubes 2, 2 ...
Of the joint brazing portion can also be avoided.

According to an eighth aspect of the present invention, as a method for solving the above-mentioned problems, a pair of headers 1A and 1B through which a refrigerant is introduced and discharged is provided in a communicating state between the headers 1A and 1B and in the longitudinal direction. , And a plurality of flat heat transfer tubes 2, 2... Arranged side by side at a predetermined interval from each other, and corrugated fins 3 interposed between these flat heat transfer tubes 2, 2,. In forming the air heat exchanger composed of the heat exchangers 3 and 3 into a curved shape by bending the headers 1A and 1B, the corrugated fins 3 selected from among the flat heat transfer tubes 2, 2,. With the headers 1A, 1
B is to be pulled out before bending.

With the above construction, when the headers 1A and 1B are bent, the distortion due to bending concentrates on the portion from which the corrugated fins 3 have been removed in advance, and the other corrugated fins 3, 3.・ No buckling deformation occurs. Therefore, the heat exchange capacity can be predicted. In addition, since specific portions of the headers 1A and 1B are bent and deformed, it is possible to avoid destruction of the joints of the other corrugated fins 3 and 3 and the joint brazing portions of the flat heat transfer tubes 2 and 2. be able to.

According to a ninth aspect of the present invention, as a method for solving the above-mentioned problem, a pair of headers 1A and 1B into which a refrigerant is introduced and discharged is provided in a communicating state between the headers 1A and 1B and in the longitudinal direction. , And a plurality of flat heat transfer tubes 2, 2... Arranged side by side at a predetermined interval from each other, and corrugated fins 3 interposed between these flat heat transfer tubes 2, 2,. When the headers 1A and 1B are formed into a curved shape by bending the air heat exchanger composed of 3..., The fin pitch P ₁ of the selected one of the corrugated fins 3, 3. It is set to be larger than others.

[0023] By the structure described above, the header 1A, when bending the 1B, will be distorted by bending the small corrugated fins 3 'portion of the fin pitch P ₁ of strength is concentrated, the fin pitch P ₁ The corrugated fins 3 'are buckled, but the other corrugated fins 3, 3 are not buckled. Therefore, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity. Also,
Since buckling deformation occurs intensively at a specific corrugated fin 3 ', it is possible to avoid destruction of the joints of the other corrugated fins 3, 3 ... and the joint brazed portions of the flat heat transfer tubes 2, 2 ... it can.

According to a tenth aspect of the present invention, as a method for solving the above-mentioned problem, a pair of headers 1A and 1B into which a refrigerant is introduced and discharged is provided in a communicating state between the headers 1A and 1B and in the longitudinal direction. , And a plurality of flat heat transfer tubes 2, 2... Arranged side by side at a predetermined interval from each other, and corrugated fins 3 interposed between these flat heat transfer tubes 2, 2,. In order to make the air heat exchanger composed of 3... Into a curved shape by bending the headers 1A and 1B, a deformation promoting means that is easily deformed at the time of bending is provided at a predetermined position in the headers 1A and 1B. The headers 1A and 1B are formed before bending.

With the above construction, when the headers 1A and 1B are bent, the strain due to bending concentrates on the portion where the deformation promoting means is formed in advance, and the corrugation corresponding to the deformation promoting means is formed. The fins 3 ', 3', 3 'do not buckle and the other corrugated fins 3, 3,... Do not buckle. Therefore, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity.
In addition, since specific portions of the headers 1A and 1B are bent and deformed, it is possible to avoid destruction of the joints of the other corrugated fins 3, 3,... And the joint brazing portions of the flat heat transfer tubes 2, 2,. be able to.

As in the eleventh aspect of the present invention, in the method for manufacturing an air heat exchanger according to the tenth aspect, the deformation promoting means is constituted by a concave portion 7 formed on the inner peripheral side of the headers 1A and 1B. In this case, the deformation promoting means can be constituted only by forming the recessed portions 7 at the selected portions of the headers 1A and 1B.

According to a twelfth aspect of the present invention, in the method for manufacturing an air heat exchanger according to the tenth aspect, the deformation promoting means is formed on the inner peripheral side of the headers 1A and 1B and is closed after bending. In the case where the cuts 8 are formed, the deformation promoting means can be formed only by forming cuts 8 which are closed after bending at selected portions of the headers 1A and 1B.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First Embodiment FIGS. 1 to 3 show an air heat exchanger according to a first embodiment of the present invention.

This air heat exchanger comprises a pair of pipe-shaped upper and lower headers 1A, 1B into which a refrigerant is introduced and discharged, and a space between the upper and lower headers 1A, 1B, as described in the section of the prior art. A large number of flat heat transfer tubes 2 arranged in parallel with each other in a state of
, And these flat heat transfer tubes 2, 2, are interposed between the flat heat transfer tubes 2, 2. Corrugated fins 3, 3
・ It consists of Reference numerals 4 and 5 are external refrigerant pipes.

As shown in FIG. 2, each of the flat heat transfer tubes 2 has a plurality of refrigerant passage holes 2a, 2a,... Having a rectangular cross section and arranged in parallel with each other through partition walls 2b, 2b,.
The refrigerant introduced and distributed from the external refrigerant pipe 4 or 5 through the header 1A or 1B is directed downward from above or upward from below in each of the refrigerant flow holes 2a. Flow evenly, and perform efficient heat exchange between the internal refrigerant and the external air with a heat transfer area as wide as possible via the uneven surface and the fin surfaces of the corrugated fins 3, 3,. It has become.

In the present embodiment, the selected one of the corrugated fins 3, 3,.
As shown in FIG. 2, a cut 6 in a direction orthogonal to the headers 1A and 1B is formed in advance before bending the headers 1A and 1B. The cut 6 is inserted into the corrugated fin 3 with a cutter knife or the like, and may be formed over the entire width of the corrugated fin 3 as shown in the figure.
It may be formed only at both ends or only one end.

When the headers 1A and 1B are bent as shown in FIG. 3, the corrugated fins 3 'having the cuts 6 are buckled intensively, as shown in FIG. The corrugated fins 3, 3,... Are not buckled. Therefore, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity. In addition, since buckling deformation occurs intensively at a specific corrugated fin 3 ', breakage of the joints of the other corrugated fins 3, 3,... And the brazed joints of the flat heat transfer tubes 2, 2,. be able to.

Second Embodiment FIGS. 4 and 5 show an air heat exchanger according to a second embodiment of the present invention.

In this case, the corrugated fins 3 of the selected one of the flat heat transfer tubes 2, 2,.
It has been punched out before bending of A and 1B. Other configurations are the same as those in the first embodiment, and a description thereof will be omitted.

When the headers 1A and 1B are bent, as shown in FIG. 5, when the headers 1A and 1B are bent, strain due to bending concentrates on the portions where the corrugated fins 3 are eliminated, and the remaining corrugated fins 3 are bent. , 3... Are not buckled and the heat exchange capacity can be predicted. Also,
Since specific portions of the headers 1A and 1B are bent and deformed, it is also necessary to avoid destruction of the remaining joint portions of the corrugated fins 3, 3,... And the joint brazing portions of the flat heat transfer tubes 2, 2,. Can be.

Third Embodiment FIGS. 6 and 7 show an air heat exchanger according to a third embodiment of the present invention.

[0038] In this case, the fin pitch P ₁ of the selected ones of the corrugated fins 3, 3 ... (shown by reference numeral 3 '), greater than the fin pitch P ₀ of the others (indicated by reference numeral 3) You have set. Other configurations are the same as those in the first embodiment, and a description thereof will be omitted.

In the case of the above configuration, as shown in FIG. 7, when the headers 1A and 1B are bent, the fin pitch P _{1 having} a small proof stress (larger than the fin pitch P ₀ of the other corrugated fins 3) is obtained. Strain due to bending is concentrated on the corrugated fin 3 ', and the corrugated fin 3' is buckled, but the other corrugated fins 3, 3,... Are not buckled. Therefore,
Corrugated fins 3 'that cause buckling deformation can be predicted, and the heat exchange capacity can be predicted. In addition, since buckling deformation occurs intensively at a specific corrugated fin 3 ', breakage of the joints of the other corrugated fins 3, 3,... And the brazed joints of the flat heat transfer tubes 2, 2,. be able to.

Fourth Embodiment FIGS. 8 to 10 show an air heat exchanger according to a fourth embodiment of the present invention.

In this case, recesses 7, 7, 7 constituting deformation promoting means which are easily deformed during bending are formed at predetermined positions in the headers 1A, 1B. The recess 7
As shown in FIG. 9, is formed by denting a position on the inner peripheral side after bending in the headers 1A and 1B into a triangular shape. Other configurations are the same as those in the first embodiment, and a description thereof will be omitted.

In the case of the above configuration, as shown in FIG. 10, when the headers 1A and 1B are bent, distortion due to bending is generated in the portions where the recesses 7, 7, 7 serving as deformation promoting means are formed. Will be concentrated, and the concave portion 7,
Corrugated fins 3 ', 3', 3 'corresponding to 7, 7 are buckled and the other corrugated fins 3, 3,... Are not buckled. Therefore, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity. Also, headers 1A, 1
Since a specific portion of B is bent and deformed, it is possible to avoid destruction of the joints of the other corrugated fins 3, 3... And the joint brazing portions of the flat heat transfer tubes 2, 2,.

Fifth Embodiment FIGS. 11 and 12 show an air heat exchanger according to a fifth embodiment of the present invention.

In this case, cuts 8, 8, 8 are formed at predetermined positions in the headers 1A, 1B to constitute deformation promoting means which are easily deformed during bending. The cut 8
Are formed by partially cutting out the positions on the inner peripheral side after bending in the headers 1A and 1B. The cut 8 is closed by welding or the like after bending of the headers 1A and 1B. Other configurations are the same as those in the first embodiment, and a description thereof will be omitted.

In the case of the above configuration, as shown in FIG. 12, when the headers 1A, 1B are bent, distortion due to bending is generated in the portions where the cuts 8, 8, 8 serving as deformation promoting means are formed. Will be concentrated,
Corrugated fins 3 ', 3', 3 'corresponding to 8, 8 do not buckle, and the other corrugated fins 3, 3, ... do not buckle. Therefore, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity. Also, headers 1A, 1
Since a specific portion of B is bent and deformed, it is possible to avoid destruction of the joints of the other corrugated fins 3, 3... And the joint brazing portions of the flat heat transfer tubes 2, 2,.

[0046]

According to the first aspect of the present invention, the refrigerant is introduced,
A pair of headers 1A, 1B to be derived, and the headers 1A, 1B,
A plurality of flat heat transfer tubes 2, 2...
And corrugated fins 3, 3,... Interposed between the flat heat transfer tubes 2, 2,... So as to be able to conduct heat, and the air heat exchanger formed by bending the headers 1A, 1B. A cut 6 is formed in a selected one of the corrugated fins 3, 3,... In a direction perpendicular to the headers 1A, 1B, and the cut 6 is formed when the headers 1A, 1B are bent. The corrugated fins 3 'are buckled intensively, and the other corrugated fins 3'
Since 3 ... did not buckle,
Corrugated fins 3 'that cause buckling deformation can be predicted, and the heat exchange ability can be predicted.

Further, since buckling deformation occurs intensively at a specific corrugated fin 3 ′, other corrugated fins 3 ′
There is also an effect that destruction of the joint portion 3 and the brazing portion of the flat heat transfer tubes 2, 2.

According to the second aspect of the present invention, a pair of headers 1A, 1B through which the refrigerant is introduced and discharged, and the headers 1A, 1B
B, and a number of flat heat transfer tubes 2, 2,...
The corrugated fins 3, 3,... Interposed between the flat heat transfer tubes 2, 2,... So as to be able to conduct heat, and the headers 1A, 1B are bent to form an air heat exchanger. The corrugated fins 3 of the selected one of the flat heat transfer tubes 2, 2,... Are removed, and the headers 1A, 1B are removed.
When bending is performed, the strain due to bending is concentrated on the portion from which the corrugated fins 3 have been removed, and the remaining corrugated fins 3, 3,. The effect is that prediction can be made.

Also, since specific portions of the headers 1A and 1B are bent and deformed, the joints of the remaining corrugated fins 3, 3... And the brazed joints of the flat heat transfer tubes 2, 2. There is also an effect that destruction can be avoided.

According to the third aspect of the present invention, a pair of headers 1A and 1B through which the refrigerant is introduced and discharged, and the headers 1A and 1B
B, and a number of flat heat transfer tubes 2, 2,...
The corrugated fins 3, 3,... Interposed between the flat heat transfer tubes 2, 2,... So as to be able to conduct heat, and the headers 1A, 1B are bent to form an air heat exchanger. the fin pitch P ₁ of those chosen from among the corrugated fins 3, 3 ..., is set larger than the others, a header 1A, when bending the 1B, corrugated fins 3 small fin pitch P ₁ of strength ′ So that the corrugated fins 3 ′ with the fin pitch P ₁ are buckled and deformed, but the other corrugated fins 3, 3. Corrugated fins 3 'that cause buckling deformation can be predicted, and the heat exchange ability can be predicted.

Since buckling deformation occurs intensively at a specific corrugated fin 3 ′, other corrugated fins 3 ′
There is also an effect that destruction of the joint portion 3 and the brazing portion of the flat heat transfer tubes 2, 2.

According to the fourth aspect of the present invention, a pair of headers 1A, 1B through which the refrigerant is introduced and discharged, and the headers 1A, 1B
B, and a number of flat heat transfer tubes 2, 2,...
The corrugated fins 3, 3,... Interposed between the flat heat transfer tubes 2, 2,... So as to be able to conduct heat, and the headers 1A, 1B are bent to form an air heat exchanger. At a predetermined position in the headers 1A and 1B, a deformation promoting means which is easily deformed at the time of bending is formed.
When A and 1B are bent, the strain due to bending concentrates on the portion where the deformation promoting means is formed, and the corrugated fins 3 ', 3', 3 'corresponding to the deformation promoting means are buckled and deformed. Of the corrugated fins 3 'are prevented from buckling deformation, so that the corrugated fins 3' that cause buckling deformation can be predicted, and the heat exchange ability can be predicted.

Since specific portions of the headers 1A and 1B are bent and deformed, the other corrugated fins 3
There is also an effect that destruction of the joint portion 3 and the brazing portion of the flat heat transfer tubes 2, 2.

As in the invention of claim 5, claim 4
In the air heat exchanger described above, when the deformation accelerating means is constituted by a concave portion 7 formed on the inner peripheral side of the headers 1A and 1B, the concave portion 7 is formed at a selected portion of the headers 1A and 1B. Just by doing so, the deformation promoting means can be configured.

As in the invention of claim 6, claim 4
In the air heat exchanger described above, when the deformation promoting means is constituted by a cut 8 formed on the inner peripheral side of the headers 1A and 1B and closed after bending,
Deformation promoting means can be constituted only by forming cuts 8 which are closed after bending at selected portions A and 1B.

According to the seventh aspect of the present invention, a pair of headers 1A and 1B through which the refrigerant is introduced and discharged, and the headers 1A and 1B
B, and a number of flat heat transfer tubes 2, 2,...
The corrugated fins 3, 3,... Interposed between the flat heat transfer tubes 2, 2,... So as to conduct heat can be bent by bending the headers 1A, 1B. In the above, the selected one of the corrugated fins 3, 3.
A cut 6 in a direction orthogonal to 1B is formed by the headers 1A and 1B.
The header 1 is formed beforehand before bending.
When A and 1B are bent, the corrugated fins 3 ′ with the cuts 6 in advance cause buckling deformation intensively,
Since the other corrugated fins 3, 3,... Are prevented from buckling deformation, the corrugated fins 3 'that cause buckling deformation can be predicted, and the heat exchange ability can be predicted. .

Since buckling deformation occurs intensively at a specific corrugated fin 3 ', other corrugated fins 3'
There is also an effect that destruction of the joint portion 3 and the brazing portion of the flat heat transfer tubes 2, 2.

According to the eighth aspect of the present invention, a pair of headers 1A and 1B through which the refrigerant is introduced and discharged, and the headers 1A and 1B
B, and a number of flat heat transfer tubes 2, 2,...
The corrugated fins 3, 3,... Interposed between the flat heat transfer tubes 2, 2,... So as to conduct heat can be bent by bending the headers 1A, 1B. In doing so, the flat heat transfer tubes 2, 2,.
・ The corrugated fins 3 selected from among
When the headers 1A and 1B are bent beforehand, the distortion due to bending concentrates on the portion from which the corrugated fins 3 have been removed, and the other corrugated fins are bent when the headers 1A and 1B are bent. Since buckling deformation of 3, 3,... Is prevented, the heat exchange ability can be predicted.

Since specific portions of the headers 1A and 1B are bent and deformed, the other corrugated fins 3
There is also an effect that destruction of the joint portion 3 and the brazing portion of the flat heat transfer tubes 2, 2.

According to the ninth aspect of the present invention, a pair of headers 1A, 1B through which the refrigerant is introduced and discharged, and the headers 1A, 1B
B, and a number of flat heat transfer tubes 2, 2,...
The corrugated fins 3, 3,... Interposed between the flat heat transfer tubes 2, 2,... So as to conduct heat can be bent by bending the headers 1A, 1B. The fin pitch P of the selected one of the corrugated fins 3, 3,.
_1, as is set larger than the others, a header 1A, when bending the 1B, concentrated distortion caused by bending the small corrugated fins 3 'portion of the fin pitch P ₁ of strength, fin pitch P ₁ corrugated fin 3 '
Is buckled, but other corrugated fins 3, 3
Since the buckling deformation is prevented, the corrugated fins 3 'causing the buckling deformation can be predicted, and the heat exchange ability can be predicted.

Further, since buckling deformation occurs intensively at a specific corrugated fin 3 ', the other corrugated fins 3'
There is also an effect that destruction of the joint portion 3 and the brazing portion of the flat heat transfer tubes 2, 2.

According to the tenth aspect, the refrigerant is introduced,
A pair of headers 1A, 1B to be derived, and the headers 1A, 1B,
A plurality of flat heat transfer tubes 2, 2...
And the corrugated fins 3, 3,... Interposed between the flat heat transfer tubes 2, 2,... So as to be able to conduct heat by bending the headers 1A, 1B. In forming a curved shape, the header 1A, 1
B is formed in advance at a predetermined position in B before deformation of the headers 1A and 1B, which is easily deformed during bending, so that when the headers 1A and 1B are bent, the deformation promotion means is formed in advance. Strain due to bending concentrates on the formed portion, and the corrugated fins 3 ', 3', 3 'corresponding to the deformation promoting means undergo buckling deformation, and the other corrugated fins 3, 3,. Since this is eliminated, it is possible to predict the corrugated fins 3 'that cause buckling deformation, and it is possible to predict the heat exchange capacity.

Since specific portions of the headers 1A and 1B are bent and deformed, the other corrugated fins 3
There is also an effect that destruction of the joint portion 3 and the brazing portion of the flat heat transfer tubes 2, 2.

As in the eleventh aspect of the present invention, in the method of manufacturing an air heat exchanger according to the tenth aspect, the deformation promoting means is constituted by a concave portion 7 formed on the inner peripheral side of the headers 1A and 1B. In this case, the deformation promoting means can be constituted only by forming the recessed portions 7 at the selected portions of the headers 1A and 1B.

According to a twelfth aspect of the present invention, in the method for manufacturing an air heat exchanger according to the tenth aspect, the deformation promoting means is formed on the inner peripheral side of the headers 1A and 1B and is closed after bending. In the case where the cuts 8 are formed, the deformation promoting means can be formed only by forming cuts 8 which are closed after bending at selected portions of the headers 1A and 1B.

[Brief description of the drawings]

FIG. 1 is a front view showing a state before bending of an air heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing a configuration of a main part of the air heat exchanger according to the first embodiment of the present invention.

FIG. 3 is a front view showing a state after bending of the air heat exchanger according to the first embodiment of the present invention.

FIG. 4 is a front view showing a state before bending of an air heat exchanger according to a second embodiment of the present invention.

FIG. 5 is a front view showing a state after bending of an air heat exchanger according to a second embodiment of the present invention.

FIG. 6 is a front view showing a state before bending of an air heat exchanger according to a third embodiment of the present invention.

FIG. 7 is a front view showing a state after bending of an air heat exchanger according to a third embodiment of the present invention.

FIG. 8 is a front view showing a state before bending of an air heat exchanger according to a fourth embodiment of the present invention.

FIG. 9 is an enlarged plan view of a recess serving as a deformation promoting means in the air heat exchanger according to the fourth embodiment of the present invention.

FIG. 10 is a front view showing a state after bending of an air heat exchanger according to a fourth embodiment of the present invention.

FIG. 11 is a front view showing a state before bending of an air heat exchanger according to a fifth embodiment of the present invention.

FIG. 12 is a front view showing a state after bending of an air heat exchanger according to a fifth embodiment of the present invention.

FIG. 13 is a front view showing a state before bending of a conventionally known air heat exchanger.

FIG. 14 is a front view showing a state after bending of a conventionally known air heat exchanger.

FIG. 15 is an enlarged view showing a joint between a header and a flat heat transfer tube after bending of a conventionally known air heat exchanger.

FIG. 16 is an enlarged view showing a joint between a flat heat transfer tube and a corrugated fin after bending of a conventionally known air heat exchanger.

[Explanation of symbols]

1A and 1B are headers, 2 is a flat heat transfer tube, 3 and 3 'are corrugated fins, 6 is a cut, 7 is a deformation promoting means (recess), and 8 is a deformation promoting means (cut).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yutaka Shibata 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Kanaoka Plant, Sakai Works, Ltd.

Claims (12)

[Claims] 1. A pair of headers (1A) and (1B) through which a refrigerant is introduced and discharged, and a predetermined interval between the headers (1A) and (1B) in the longitudinal direction thereof. A large number of flat heat transfer tubes (2), (2)
And the corrugated fins (3), (3), which are provided between the flat heat transfer tubes (2), (2),.
An air heat exchanger formed by bending the headers (1A) and (1B), wherein a selected one of the corrugated fins (3) and (3) includes: An air heat exchanger characterized by forming a cut (6) in a direction orthogonal to the headers (1A) and (1B). 2. A pair of headers (1A) and (1B) through which a refrigerant is introduced and discharged, and a predetermined distance from each other in the longitudinal direction in a communicating state between the headers (1A) and (1B). A large number of flat heat transfer tubes (2), (2)
And the corrugated fins (3), (3), which are provided between the flat heat transfer tubes (2), (2),.
An air heat exchanger formed by bending the headers (1A) and (1B), wherein the air heat exchanger is selected from among the flat heat transfer tubes (2), (2). An air heat exchanger characterized by eliminating corrugated fins (3). 3. A pair of headers (1A) and (1B) through which a refrigerant is introduced and discharged, and a predetermined distance from each other in the longitudinal direction in a communicating state between the headers (1A) and (1B). A large number of flat heat transfer tubes (2), (2)
And the corrugated fins (3), (3), which are provided between the flat heat transfer tubes (2), (2),.
An air heat exchanger formed by bending the headers (1A) and (1B), wherein the fin pitch of a selected one of the corrugated fins (3), (3). An air heat exchanger, wherein P ₁ ) is set larger than the others. 4. A pair of headers (1A) and (1B) through which a refrigerant is introduced and discharged, and a predetermined interval between the headers (1A) and (1B) in the longitudinal direction thereof. A large number of flat heat transfer tubes (2), (2)
And the corrugated fins (3), (3), which are provided between the flat heat transfer tubes (2), (2),.
An air heat exchanger formed by bending the headers (1A) and (1B);
An air heat exchanger characterized in that a deformation promoting means which is easily deformed during bending is formed at a predetermined position in (A) and (1B). 5. The method according to claim 1, wherein the deformation promoting means is provided in the header (1).
The air heat exchanger according to claim 4, characterized in that the air heat exchanger is constituted by a recess (7) formed on the inner peripheral side of (A) and (1B). 6. The method according to claim 1, wherein the deformation promoting means is provided in the header (1).
The air heat exchanger according to claim 4, characterized in that the air heat exchanger is formed by a cut (8) formed on the inner peripheral side of A) and (1B) and closed after bending. 7. A pair of headers (1A) and (1B) through which a refrigerant is introduced and discharged, and a predetermined distance from each other in the longitudinal direction in a communicating state between the headers (1A) and (1B). A large number of flat heat transfer tubes (2), (2)
And the corrugated fins (3), (3), which are provided between the flat heat transfer tubes (2), (2),.
· The air heat exchanger consisting of the header (1A),
In bending the (1B) into a curved shape, a selected one of the corrugated fins (3), (3)... Includes the headers (1A) and (1B).
The cut (6) in the direction orthogonal to
A method for manufacturing an air heat exchanger, wherein the air heat exchanger is formed in advance before the bending of (1B). 8. A pair of headers (1A) and (1B) through which a refrigerant is introduced and discharged, and a predetermined interval between the headers (1A) and (1B) in the longitudinal direction thereof. A large number of flat heat transfer tubes (2), (2)
And the corrugated fins (3), (3), which are provided between the flat heat transfer tubes (2), (2),.
· The air heat exchanger consisting of the header (1A),
In bending the (1B) into a curved shape, corrugated fins (3), (3),... Selected from the flat heat transfer tubes (2), (2),.
Before the bending of the headers (1A) and (1B). 9. A pair of headers (1A) and (1B) through which a refrigerant is introduced and led out, and a predetermined interval between the headers (1A) and (1B) in the longitudinal direction thereof. A large number of flat heat transfer tubes (2), (2)
And the corrugated fins (3), (3), which are provided between the flat heat transfer tubes (2), (2),.
· The air heat exchanger consisting of the header (1A),
In forming a curved shape by bending (1B), the fin pitch (P ₁ ) of the selected one of the corrugated fins (3), (3),. A method for manufacturing an air heat exchanger. 10. A pair of headers (1A) and (1B) through which a refrigerant is introduced and discharged, and a predetermined distance between the headers (1A) and (1B) in the longitudinal direction thereof. A large number of flat heat transfer tubes (2), (2)
And the corrugated fins (3), (3), which are provided between the flat heat transfer tubes (2), (2),.
· The air heat exchanger consisting of the header (1A),
In bending the (1B) into a curved shape, a deformation promoting means which is easily deformed at the time of bending is provided at a predetermined position in the headers (1A) and (1B). A method for manufacturing an air heat exchanger, wherein the air heat exchanger is formed before bending. 11. The method according to claim 1, wherein the deformation promoting means is provided in the header (1).
The method for manufacturing an air heat exchanger according to claim 10, characterized in that the air heat exchanger is constituted by a concave portion (7) formed on the inner peripheral side of (A) and (1B). 12. The method according to claim 11, wherein the deformation promoting means is provided in the header (1).
11. The method for manufacturing an air heat exchanger according to claim 10, wherein the cut is formed on the inner peripheral side of A) and (1B) and is closed after bending.