JP2003222495A - Fin member for heat exchange and heat exchanger using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger effectively used as a condenser for air conditioning of a building, and having high workability and heat exchanging efficiency. <P>SOLUTION: This fin member is used in a heat exchanger comprising a main fin part for heat exchange along a first direction, a header for supplying a heat exchanging medium and the like from a second direction, and a distributor fin part for distributing the heat exchanging medium and the like, and a part of the main fin 31 and the distributor fin 21 are integrated. The heat exchanger uses this fin member. A slit 41 is preferable formed on a boundary part of the integrated main fin and distributor fin. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a main fin portion for heat exchange and a distributor fin portion for distributing or gathering in a flow path of a heat exchange medium and an external fluid, and a part of main fins constituting them. And fins for heat exchange that are integrally configured with a distributor fin, and a heat exchange device using the same, and are most suitable as condensers for building air conditioning, which can ensure a uniform flow of heat exchange medium and improve heat exchange efficiency. The present invention relates to a heat exchanging fin member and a heat exchanging device.

[0002]

2. Description of the Related Art In recent years, a heat exchanger for a building air conditioner has been remarkably improved, and it is required to develop a condenser (condenser) which is easy to assemble during construction and exhibits excellent heat exchange efficiency during operation. , Some models corresponding to this have been applied. Usually, a refrigerant is used as a heat exchange medium used for building air conditioning, and cold water is used as an external fluid.

FIG. 1 is a view showing an external configuration example of a condenser used as a heat exchange device for building air conditioning.
(a) is a front view in which the inlet and outlet sides of cold water are observed, and (b) is a side view thereof. In the heat exchange device 10 shown in FIG. 1, headers 1 are provided at the upper and lower portions, and heat exchange between the refrigerant and the cold water is performed in a countercurrent system in which the flow of the cold water and the refrigerant are opposed to each other in the up and down direction in the device body. Is.

The cold water supplied from the lower header 1b is
It is supplied from a direction orthogonal to the direction of up-and-down flow, is distributed on the inlet side to become an upward flow, and is then collected and discharged again on the outlet side in a direction orthogonal to the vertical direction. On the other hand, the refrigerant supplied from the header 1a at the upper end is supplied from a direction orthogonal to the vertical direction of the main body of the heat exchange device, is distributed on the inlet side and becomes a downflow, and after heat exchange in the main body of the device, it remains as it is. Is discharged from the outlet side.

2A and 2B are plan views showing the flow paths of the refrigerant and the cold water. FIG. 2A shows the refrigerant flow path and FIG. 2B shows the cold water flow path. As shown in FIG. 2, a distributor fin portion 2 is provided on the inlet side of the upper part of the refrigerant flow path, and the refrigerant passing therethrough is distributed to the main fin portion 3 orthogonal to the distributor fin portion 2. ing.

On the other hand, in the cold water flow path, distributor fins 2 are provided on the inlet side and outlet side, and the refrigerant supplied from the lower header is distributed by the inlet side distributor fins 2 to the main fins 3 orthogonal to each other. ,
After that, by the outlet distributor fin unit 2,
It is adapted to be assembled from the main fin portion 3.

FIG. 3 is a cross-sectional view showing a flow path configuration for a coolant and cold water provided in the heat exchange device. In the figure,
A indicates a refrigerant flow path, B indicates a cold water flow path, and these are laminated and assembled to form a refrigerant and cold water flow path. Each flow path has a structure in which the separate plate 5 is brazed to the fin member 4.

Since the refrigerant flow passages and the cold water flow passages are alternately laminated in the heat exchange device, the fin member 4 is brazed to ensure structural strength and increase the heat exchange area. We are working to improve exchange efficiency. Normally, the number of stages in which the refrigerant flow passage and the cold water flow passage are stacked is designed according to the cooling capacity required for the heat exchange device.

As shown in FIG. 2, in the heat exchange device in which the refrigerant and cold water supply passages and the heat exchange passage are orthogonal to each other,
The distribution status of the refrigerant and the cold water by the distributor fin portion affects the heat exchange performance. That is, in order to improve the heat exchange efficiency, it is necessary to make the split flow from the distributor fin portion to the main fin portion uniform.

[0010]

Generally, heat exchange fin members such as main fins and distributor fins are
It is formed into a corrugated shape. The conventional distributor fin is manufactured by forming a rectangular main fin, then diagonally cutting the main fin and finishing the main fin.

However, when the fin member is obliquely cut using a jig, both the distributor fin side and the main fin side are significantly deformed, and a large number of man-hours are required to correct and repair the deformation. On the other hand, if the deformation due to cutting is not sufficiently corrected, the distribution state of the refrigerant and the cold water by the distributor fins becomes non-uniform, which causes a reduction in the efficiency of the heat exchange device.

The present invention has been made in view of the above-mentioned problems in manufacturing the conventional heat exchanging fin member, and in manufacturing the distributor fin, cutting work from the rectangular main fin and cutting accompanying it. It is an object of the present invention to provide a heat exchanging fin member and a heat exchanging device using the same, which eliminates the number of man-hours such as correction of a deformed portion and exhibits excellent heat exchange efficiency.

[0013]

The inventor has made various studies in order to solve the above-mentioned problems in the conventional distributor fin manufacturing, and as a result, a part of the main fin and the distributor fin are press-molded. We paid attention to the fact that it is effective to machine integrally.

However, when the main fin and the distributor fin whose flow directions of the refrigerant and the cold water are orthogonal to each other are integrally formed, the dimensional accuracy after the forming is reduced and a large strain deformation occurs. There's a problem. Therefore, by further studying, by appropriately selecting the fin member material and designing the dimensions,
We have found that these problems can be resolved.

The present invention has been completed on the basis of the above findings and, as shown in FIG. 4 described later, has as its gist a heat exchanging fin member (1) and a heat exchanging device (2). . (1) A main fin portion that performs heat exchange between the heat exchange medium and the external fluid along the first direction, and a header that supplies the heat exchange medium or the external fluid from a second direction orthogonal to the first direction. And a distributor fin portion for distributing the heat exchange medium or the external fluid supplied from the second direction to the main fin portion or discharging the heat exchange medium or the external fluid collected from the main fin portion in the second direction. A heat exchanging fin member 4 used in a heat exchanging device, characterized in that a part of main fins 31 constituting the main fin portion and a distributor fin 21 constituting the distributor fin portion are integrally formed. is there.

In this heat exchange fin member, it is desirable to provide a plurality of slits 41 at one location or at two or more locations at the boundary between the integrally formed main fin and the distributor fin. (2) A main fin portion that stacks the heat exchanging fin members 4 according to (1) above to perform heat exchange between the heat exchange medium and the external fluid in the first direction, and the main fin portion. The heat exchange medium or the external fluid is distributed from the second direction orthogonal to the first direction, or the distributor fin portion is formed to collect the heat exchange medium or the external fluid from the main fin portion in the second direction. It is a heat exchange device.

The "first direction" defined in the present invention means the direction in which heat is exchanged between the heat exchange medium and the external fluid and the direction in which these are supplied, as in the heat exchange device shown in FIG. Means a direction in which heat is exchanged, and “second direction” means a direction orthogonal to this.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION In the following description, the contents of the present invention will be described in detail on the basis of the configuration of a condenser (condenser) for air conditioning, but the present invention is not limited to this and is intended for industrial use. A heat exchange device widely used in each field is assumed. Further, for the sake of concrete description, it is assumed that a refrigerant is used as the heat exchange medium and cold water is used as the external fluid.

FIG. 4 is an external perspective view showing a structural example of the heat exchanging fin member of the present invention. As shown in FIG. 4, the heat exchanging fin member 4 of the present invention is arranged so that the direction of heat exchange between the refrigerant and the cold water is orthogonal to the direction in which the refrigerant and the cold water are supplied. A part and the distributor fin 21 are integrally molded. The “first direction” and the “second direction” defined in the present invention are as illustrated.

When the heat exchanging fin member 4 shown in FIG. 4 is formed, the distributor fins 21 are formed with fins having a constant pitch in parallel with the "second direction", and the main fins 31 are formed in the "first direction". Fins with a constant pitch are processed in parallel. Therefore, the residual strain due to the press working is not uniform, and the strain deformation amount is different between the distributor fin 21 side and the main fin 31 side after the press working.

Since the amount of strain deformation after processing is different, the heat exchange fin member integrally formed may be twisted, which may cause a problem in brazing work. Further, if the material of the fin member is improper, the thickness is significantly reduced during the forming process, the fins are broken at the corners, or the fin height varies greatly, resulting in a poor brazing state. Sometimes. However, according to the study by the present inventor, these problems can be solved by optimally selecting the fin member material and designing the fin shape. For example, as a material for the fin member, an aluminum alloy of JIS H4000 A3003 and a plate thickness of about 0.6 mm are desirable.

In order to reduce the twist generated in the entire heat exchanging fin member, it is desirable to provide a single slit or a plurality of slits 41 at the boundary between a part of the main fin 31 and the distributor fin 21 which are integrally formed. . In FIG. 4, the slit 41 is provided along the intersection of the two, but this single slit or a plurality of slits makes it possible to reduce the amount of strain deformation after press working.

In the heat exchanging device of the present invention, the main fin portion and the distributor fin portion are formed by stacking the above-mentioned heat exchanging fin members. With such a configuration, even when it is used as a heat exchange device for building air conditioning, assembly at the time of construction is easy, and excellent heat exchange efficiency during operation can be exhibited. Further, in the heat exchange device of the present invention, the number of stacked layers may be designed depending on the cooling capacity, and generally 15 to 43 stacked layers are adopted.

[0024]

EXAMPLE In order to confirm the effect of the heat exchanging fin member of the present invention, a fin member used in a building air conditioning condenser was manufactured. Fig. 5 shows the dimensions of the fin member. The fin processing pitch is 5 mm, and the fins are formed in 12 rows on the distributor fin 21 side.
Side formed 34 rows of fins. The fin height is 3.2m
It was set to m ± 0.03 mm. The slits are provided at four places at the boundary between the main fin 31 and the distributor fin 21, and the width thereof is designed to be 4 to 8 mm after processing.

The material used was a JIS H4000 A3003 aluminum plate with dimensions of 80 mm × 191 mm × wall thickness 0.61 mm.

When the wall thickness distribution of the molded fin member was investigated, the minimum wall thickness portion occurred at the fin corner portion, and the wall thickness reduction rate was about 30%, but no fin fracture was observed. It was a good result.

A test core was produced using the obtained fin member. A brazing sheet (for example, JIS Z3263 BAS231P) was laid on a separate plate, a fin member was attached and fired to braze the fin plate and the fin member to produce a test core.

In order to confirm the performance of the test core, a pressure resistance test (22.5 kg / cm ² G) and an airtightness test (16.5 kg / cm ² G) were carried out, but all passed and the brazing condition was good. . Further, the split state of the refrigerant and the cold water in the flow channel was observed, and it was found that it was good and exhibited excellent heat exchange efficiency.

[0029]

According to the heat exchanging fin member of the present invention,
When manufacturing distributor fins, the number of man-hours such as cutting from the rectangular main fin and the modification of the cutting and deforming part accompanying it is eliminated, and there is little deformation after processing, and dimensional accuracy can be secured, resulting in excellent heat exchange efficiency. Can be demonstrated. Furthermore, the heat exchange device of the present invention is optimal as a condenser for building air conditioning, is easy to assemble at the time of construction, and can ensure a uniform flow of the heat exchange medium, so that the device efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an external configuration example of a condenser used as a heat exchange device for building air conditioning, FIG. 1 (a) is a front view of observing an inlet / outlet side of cold water, and FIG. 1 (b) is a side view thereof. is there.

FIG. 2 is a plan view showing a flow path of a refrigerant and cold water.
(a) shows a refrigerant channel and (b) shows a cold water channel.

FIG. 3 is a cross-sectional view showing a flow path configuration for a coolant and cold water provided in the heat exchange device.

FIG. 4 is an external perspective view showing a configuration example of a heat exchanging fin member of the present invention.

FIG. 5 is a diagram showing dimensional specifications of a fin member manufactured in an example.

[Explanation of symbols]

1: Header, 2: Distributor fin part 3: Main fin part, 4: Heat exchange fin member 5: Separate plate, 10: Heat exchange device 21: Distributor fin, 31: Main fin 41: Slit

Claims (3)

[Claims] 1. A main fin portion that performs heat exchange between a heat exchange medium and an external fluid along a first direction, and a heat exchange medium or an external fluid is supplied from a second direction orthogonal to the first direction. A header and a distributor fin portion for distributing the heat exchange medium or the external fluid supplied from the second direction to the main fin portion, or discharging the heat exchange medium or the external fluid collected from the main fin portion in the second direction. A heat exchanging fin member, which is used in a heat exchanging device provided, wherein a part of a main fin constituting the main fin portion and a distributor fin constituting the distributor fin portion are integrally formed. 2. The heat exchanging fin member according to claim 1, wherein one or more slits are provided at a boundary portion between the main fin and the distributor fin, which are integrally formed. 3. A main fin portion for laminating the fin member according to claim 1 and 2 for heat exchange between a heat exchange medium and an external fluid along a first direction, and a main fin portion on the main fin portion. Heat that is characterized in that a heat exchange medium or external fluid is distributed from a second direction orthogonal to the first direction, or a distributor fin portion that collects the heat exchange medium or external fluid from the main fin portion in the second direction is configured. Exchange device.