KR20110089366A - heat transmitter - Google Patents

Abstract

When a corrugated fin is provided in the outwardly flat surface of the flat tube which is located in the outermost side among the plurality of flat tubes of a heat exchanger, it aims at it not having to provide a protective plate or a protective film in the outer side. The heat exchanger 1A includes two header pipes 2 and 3 arranged in parallel at intervals and a plurality of header pipes 2 and 3 arranged therebetween, and includes a refrigerant passage 5 provided therein. The flat tube 4 which communicated inside (2, 3), and the corrugated fin 6 arrange | positioned between the flat tube 4 comrades are provided. The outermost flat surface 4 of the flat tubes 4 located at the outermost side among the plurality of flat tubes 4 is provided with an outermost corrugated fin 6a having a shape in which wrinkles overlap in a louver shape.

Description

Heat exchanger {HEAT EXCHANGER}

The present invention relates to a heat exchanger of parallel flow type.

Parallel flow which arranges a plurality of flat tubes between a plurality of header pipes, communicates a plurality of refrigerant passages inside the flat tube inside the header pipe, and arranges fins such as corrugated fins between the flat tubes. Type heat exchangers are widely used in outdoor units of car air conditioners, air conditioners for buildings, and the like.

An example of the conventional parallel flow type heat exchanger is shown in FIG. In FIG. 10, the upper side of the ground becomes the upper side in the vertical direction, and the lower side of the ground becomes the lower side in the vertical direction. The heat exchanger 1 arrange | positions two horizontal header pipes 2 and 3 in parallel at intervals in the vertical direction, and horizontally plural vertical flat tubes 4 between the header pipes 2 and 3. Direction at a predetermined pitch. The flat tube 4 is an elongated molded article extruded from a metal, and a coolant passage 5 through which a coolant flows is formed. Since the flat tube 4 is arrange | positioned in the form which makes the extrusion molding direction which is the longitudinal direction vertical, the refrigerant | coolant flow direction of the refrigerant | coolant path | route 5 also becomes vertical. As for the refrigerant | coolant path | route 5, the cross-sectional shape and the cross-sectional area are equal, and several pieces are lined up in the depth direction of FIG. Each refrigerant passage 5 communicates with the inside of the header pipes 2, 3. The corrugated fins 6 are arranged between adjacent flat tubes 4.

The header pipes 2 and 3, the flat tube 4 and the corrugated fin 6 are all made of a metal having good thermal conductivity such as aluminum, and the flat tube 4 is corrugated with respect to the header pipes 2 and 3. The pins 6 are fixed to the flat tube 4 by soldering or welding, respectively.

The heat exchanger 1 shown in FIG. 10 is a so-called parallel flow heat exchanger of downflow. Since a plurality of flat tubes 4 having a longitudinal direction in the vertical direction are provided between the upper and lower header pipes 2, 3 and a corrugated fin 6 is provided between the flat tubes 4, a heat exchanger ( The heat dissipation (heat absorption) area of 1) is large, and heat exchange can be efficiently performed. The lower header pipe 3 is provided with a refrigerant inlet 7 at one end, and the upper header pipe 2 is provided with a refrigerant inlet 8 at one end that is diagonal to the refrigerant inlet 7. In addition, the positional relationship of the refrigerant | coolant entrance / exit 7 and the refrigerant | coolant entrance / exit 8 shown here is an example, It is not limited to this. For example, the structure in which the header pipe 2 is provided with the refrigerant | coolant entrance / exit 8 in two places of both ends is also possible.

The solid arrows in FIG. 10 indicate the case where the heat exchanger 1 is used as the evaporator, and the refrigerant flows in from the refrigerant inlet 7 of the lower header pipe 3 and the refrigerant inlet of the upper header pipe 2. It flows out from (8). The refrigerant flows from bottom to top. When the heat exchanger 1 is used as a condenser, the flow of the refrigerant is reversed, and the refrigerant flows in from the refrigerant inlet 8 of the upper header pipe 2, as indicated by the dotted arrow in FIG. Flows out from the refrigerant inlet (7) of the header pipe (3). The refrigerant flows from top to bottom.

The heat exchanger 1 of FIG. 10 limits the installation location of the corrugated fin between the flat tubes 4, and of the flat tubes 4 located on the outermost side among the plurality of flat tubes 4, The corrugated pin is not provided on the surface facing outward. However, it is often done to install corrugated pins on this side. Examples can be found in Patent Documents 1 to 3.

The heat exchanger of patent document 1 is a parallel flow heat exchanger which made the flat tube horizontal, and the corrugated fin is provided also in the flat surface which turned outward of the outermost flat tube, and the outer side of this outermost corrugated fin The pin protection side plate is arrange | positioned at.

The heat exchanger described in Patent Document 2 is also a parallel flow type heat exchanger having the flat tube horizontal, and a corrugated fin is provided on a flat surface facing outward of the outermost flat tube, and on the outer side of the outermost corrugated fin, Side plates for reinforcing the core portion formed by alternately stacking the flat tube and the corrugated fin are arranged.

The heat exchanger of patent document 3 is also a parallel flow heat exchanger which leveled the flat tube, and the side sheet is soldered to the outer side of the corrugated fin in both ends.

Japanese Patent Laid-Open No. 5-79788 Japanese Patent Publication No. 2006-64194 Japanese Patent Publication No. 2007-139376

In the parallel flow type heat exchanger, when the corrugated fin is provided on the outwardly flat surface of the flat tube located at the outermost side among the plurality of flat tubes, the heat dissipation (heat absorption) area is increased, and the performance of the heat exchanger is improved. . By the way, when the pointed object touches the trough part of the corrugated pin, ie, the part fixed to the flat tube, not only the corrugated pin but also the flat tube may have a flaw and a refrigerant leak may occur. For this reason, the thing which arrange | positioned the corrugated pin in this location conventionally has arrange | positioned the protection plate (side plate and side sheet of the said patent document), or attached the protective film, and aimed at protection of the flat tube. However, if the protective plate or protective film is installed, the number of parts increases accordingly and the cost increases.

This invention is made | formed in view of the said point, and when a corrugated fin is installed in the outwardly flat surface of the flat tube which is located outmost among the plurality of flat tubes of a parallel flow type heat exchanger, a protective plate and It aims at not having to provide a protective film.

In order to achieve the above object, the heat exchanger according to the present invention includes a plurality of header pipes arranged in parallel at intervals and a plurality of header pipes disposed between the plurality of header pipes and a refrigerant passage provided therein. The outermost corrugated fins provided on the outwardly flat surface of the flat tube communicated with the flat tube, the corrugated pins disposed between the flat tubes, and the flat tubes positioned on the outermost side among the plurality of flat tubes. In addition, the outermost corrugated pin is characterized in that the wrinkles are in a shape of overlapping in a louver shape.

According to this configuration, even if an object with a sharp tip is approaching the outermost corrugated pin, it is difficult to penetrate the outermost corrugated pin due to the wrinkles overlapping in the louver shape. Therefore, the flat tube can be sufficiently protected without providing a protective plate (side plate or side sheet) or a protective film.

In the heat exchanger of the said structure, when the said some flat tube is arrange | positioned in the longitudinal direction up-down direction, it is preferable that the said outermost corrugated fin extends diagonally diagonally downward.

With such a configuration, the condensation water or the defrost water attached to the outermost corrugated fins flows down to the wall tip along the surface of the inclined corrugation, and drops therefrom. Water is less likely to stay between the corrugations of the outermost corrugated pins and obstruct air flow.

In the heat exchanger of the above configuration, the plurality of flat tubes are arranged with the longitudinal direction in the horizontal direction, and at least the lowest corrugated fin among the outermost corrugated fins has a shape in which wrinkles overlap in a louver shape. It is preferable.

With such a configuration, when the parallel flow heat exchanger is used in the arrangement of side flows, even if a pointed object approaches the lowermost corrugated fin, the penetrating through the lowermost corrugated fin due to the overlapping wrinkles in the louver shape It is difficult. Therefore, even if a protection plate (side plate or a side sheet) and a protective film are closed, a flat tube can fully be protected. In addition, the dew condensation water or the defrost water attached to the lowermost corrugated pin flows down the pleated tip along the surface of the inclined corrugation, falls therefrom, and is not blocked by the protective plate or the protective film, thereby improving drainage.

According to this invention, by making outermost corrugated fin into a louver shape, the flat tube in which it was installed can be protected without resorting to a protective plate or a protective film. As a result, it becomes possible to reduce a component cost by omitting a protective plate and a protective film.

1 is a vertical sectional view showing a schematic structure of a parallel flow heat exchanger according to a first embodiment.
2 is a vertical sectional view showing a schematic structure of a parallel flow heat exchanger according to a second embodiment.
3 is an exploded perspective view of components of an air conditioner outdoor unit including a parallel flow heat exchanger according to a second embodiment;
4 is a perspective view of a first mounting member used for mounting a parallel flow heat exchanger according to a second embodiment.
5 is a perspective view of the first installation member viewed from another direction.
6 is a perspective view of a second mounting member used for mounting a parallel flow heat exchanger according to a second embodiment.
7 is a perspective view of the second mounting member viewed from another direction;
8 is a perspective view of a third mounting member used for mounting a parallel flow heat exchanger according to a second embodiment.
9 is a perspective view of the third installation member viewed from another direction.
10 is a vertical sectional view showing a schematic structure of a conventional parallel flow type heat exchanger.

EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment of this invention is described based on FIG. In FIG. 1, the same code | symbol as what was used in FIG. 10 is attached | subjected to the component which is common in the conventional structure shown in FIG. 10, and description is abbreviate | omitted.

The heat exchanger 1A of the first embodiment is used in downflow, the header pipes 2 and 3 are horizontal, and the flat tubes 4 are arranged with the longitudinal direction in the vertical direction. Of the flat tubes 4 arranged in one row, the outermost corrugated fins 6a are provided on the outwardly flat surfaces of the flat tubes 4 located on the outermost side. The outermost corrugated fin 6a is made of a metal having good thermal conductivity, such as aluminum, and is fixed to the flat tube 4 by soldering or welding.

The solid arrow in FIG. 1 shows the case where the heat exchanger 1 is used as an evaporator, and the refrigerant flows in from the refrigerant inlet 7 of the lower header pipe 3 and the refrigerant inlet 8 of the upper header pipe 2. Out). The refrigerant flows from bottom to top. When the heat exchanger 1 is used as a condenser, the flow of the refrigerant is reversed, and the refrigerant flows in from the refrigerant inlet 8 of the upper header pipe 2, as indicated by the dotted arrow in FIG. It flows out from the refrigerant inlet 7 of the header pipe 3. The refrigerant flows from top to bottom.

The outermost corrugated pin 6a has wrinkles lying in the same direction in the longitudinal direction of the flat tube 4, and the wrinkles overlap. That is, the wrinkles overlap in the louver shape. In the case where wrinkles cannot be laid down, the thickness of the outermost corrugated pin 6a is only the thickness of one sheet of the corrugated pin at the thinnest portion. By laying down the wrinkles and overlapping, the location which only the thickness of one sheet of raw material is only can be reduced as much as possible. In this way, even if the pointed object approaches the outermost corrugated pin 6a from the side, the possibility of contacting the overlapped portion is increased. And the pointed-tip object which contacted the part in which the wrinkles overlapped is prevented by the overlapping of wrinkles, and it becomes difficult to penetrate through the outermost corrugated pin 6a. For this reason, parts, such as a side plate and a side sheet which were conventionally required in order to protect the outermost flat tube 4, are no longer needed and component cost can be reduced.

About making the outermost corrugated fin 6a into a louver shape, what was formed in the form may be provided in the flat tube 4 previously, or of the same shape as the corrugated fin 6 between the flat tubes 4. It may be provided in the flat tube 4, and then it may be laid down in one direction, such as domino wrinkles.

As described above, the heat exchanger 1A of the first embodiment is used in downflow, and the flat tube 4 is disposed with the longitudinal direction in the vertical direction. The outermost corrugated pin 6a is provided so that the wrinkles obliquely extend downward. In this way, the dew condensation water or the defrost water attached to the outermost corrugated pin 6a flows down to the pleated tip along the surface of the inclined corrugation, and drops therefrom. Water is less likely to stay between the corrugations and impede the flow of air.

Then, 2nd Embodiment of this invention is described based on FIG. The heat exchanger 1B of 2nd Embodiment is used by side flow, the header pipes 2 and 3 are made vertical, and the flat tube 4 is arrange | positioned horizontally. The refrigerant inlets 7 and 8 are provided only at the header pipe 3 side. Inside the header pipe 3, two partition plates 9a and 9c are provided at intervals in the vertical direction, and the header pipe 2 is partitioned in the middle height portion of the partition plates 9a and 9c. The plate 9b is provided.

When the heat exchanger 1B is used as the evaporator, the coolant flows in from the lower coolant inlet 7 as indicated by the solid arrows in FIG. 2. The refrigerant entering from the refrigerant inlet and outlet 7 is blocked by the partition plate 9a and directed to the header pipe 2 via the flat tube 4. This refrigerant flow is represented by a block arrow to the left. The refrigerant entering the header pipe 2 is blocked by the partition plate 9b and directed to the header pipe 3 via another flat tube 4. This refrigerant flow is represented by a block arrow to the right. The refrigerant entering the header pipe 3 is blocked by the partition plate 9c and directed back to the header pipe 2 via another flat tube 4. This refrigerant flow is represented by a block arrow to the left. Refrigerant entering the header pipe 2 is returned and directed back to the header pipe 3 via another flat tube 4. This refrigerant flow is represented by a block arrow to the right. The refrigerant entering the header pipe 3 flows out from the refrigerant inlet 8. In this way, the coolant flows from the bottom up along the zigzag path. Although the case where the number of partition plates is three was shown here, this is an example, The number of partition plates and the return frequency of the refrigerant | coolant flow which result as a result can set arbitrary numbers as needed.

When the heat exchanger 1B is used as a condenser, the flow of the refrigerant is reversed. That is, the refrigerant enters the header pipe 3 from the refrigerant inlet 8, as indicated by the dotted arrow in FIG. 2, is blocked by the partition plate 9c, and faces the header pipe 2 via the flat tube 4. In the pipe (2) it is blocked by a partition plate (9b) to the header pipe (3) via another flat tube (4), in the header pipe (3) it is blocked by a partition plate (9a) and another flat tube (4). It is said that it flows back to the header pipe 2 via the light, back to the header pipe 2, and back to the header pipe 3 via another flat tube 4, and flows out from the refrigerant inlet 7 as a dashed arrow. , It flows from top to bottom along the zigzag path.

Among the plurality of flat tubes 4, the one positioned at the top and the lowest positioned are the flat tubes 4 located at the outermost side, and in the flat surface facing outward, that is, the flat tube 4 at the top, In the upper surface and the lowest flat tube 4, the outermost corrugated fin 6a is provided on the lower surface.

Of the two upper and lower outermost corrugated fins 6a, at least the lower one (lowest corrugated fin) is in a state where wrinkles overlap in a louver shape. As a result, even when an object (for example, a screw) having a sharp tip is approaching the lowermost corrugated pin, it is difficult to penetrate the lowermost corrugated pin due to the wrinkles overlapping in the louver shape. Therefore, even if the protection plate (side plate or side sheet) and a protective film are closed, the flat tube 4 can fully be protected. In addition, the dew condensation water or the defrost water attached to the lowermost corrugated pin flows down to the pleat tip along the surface of the inclined pleats and drops therefrom, and is not blocked by the protective plate or the protective film, thereby improving drainage.

Not only the lowermost corrugated fin but also the uppermost outermost corrugated fin 6a (the uppermost corrugated fin) may have wrinkles overlapping the louvers. As a result, even if an object with a sharp tip is approaching the uppermost corrugated pin, it is difficult to penetrate the uppermost corrugated pin due to the wrinkles overlapping in the louver shape. Therefore, even if the protection plate (side plate or side sheet) and a protective film are closed, the flat tube 4 can fully be protected. In FIG. 2, the uppermost corrugated pin is also illustrated as wrinkles overlapping in the shape of a louver.

3-9 is an example which incorporated the heat exchanger 1B of 2nd Embodiment into the outdoor unit of an air conditioner. Here, the core part of the heat exchanger 1B which consists of the flat tube 4, the corrugated fin 6, and the outermost corrugated fin 6a is bent in planar L shape.

In addition to the heat exchanger 1B, some parts which comprise the housing of the outdoor unit of an air conditioner, and the installation member which installs the heat exchanger 1B in the housing are shown by FIG. That is, reference numeral 10 denotes a bottom plate of the housing, and reference numeral 11 denotes one side plate of the housing, and these are configured by pressing a steel sheet or combining pressed products of the steel sheet.

The heat exchanger 1B is installed in the housing by three kinds of mounting members, all of which are synthetic resin molded parts, and a plurality of screws that couple the mounting members or couple the mounting members to the housing. The mounting member is assembled to the header pipes 2, 3.

The upper portion of the header pipe 3 is sandwiched between the first mounting member 12 in the shape shown in FIGS. 4 and 5 and the second mounting member 13 in the shape shown in FIGS. 6 and 7. The first mounting member 12 and the second mounting member 13 are fastened by a screw 14 to be integrated. The first attaching member 12 and the second attaching member 13 surround the refrigerant inlet pipe 8 and also serve to protect the connection portion of the refrigerant inlet pipe 8.

The lower portion of the header pipe 3 is sandwiched between another set of first attaching members 12 and second attaching members 13. The first mounting member 12 and the second mounting member 13 invert the posture up and down with the first mounting member 12 and the second mounting member 13 with the upper portion of the header pipe 3 interposed therebetween. have. The first mounting member 12 and the second mounting member 13 are also fastened by the screws 14 to be integrated. The first mounting member 12 and the second mounting member 13 surround the refrigerant inlet pipe 7 and also serve to protect the connection portion of the refrigerant outlet pipe 7.

As described above, the first mounting member 12 and the second mounting member 13 (integrated thereof) provided on the upper and lower portions of the header pipe 3 are fixed to the housing by another screw 14. Thereby, installation of the header pipe 3 side is completed.

Two third mounting members 15 are used for mounting on the header pipe 2 side. The 3rd mounting member 15 of the shape shown to FIG. 8 and FIG. 9 is fitted to the upper end part and the lower end part of the header pipe 2, and the 3rd mounting part 15 is then fixed to the housing with the bis | 14. Thereby, installation of the header pipe 2 side is completed.

As described above, the heat exchanger 1B is installed in the housing using the first mounting member 12, the second mounting member 13, and the third mounting member 15, which are synthetic resin molded parts, thereby providing the heat exchanger 1B. Direct contact with the housing can be avoided. As a result, even if the heat exchanger 1B and the housing consist of different metals, electroforming can be prevented.

By setting the parallel flow heat exchanger to the configuration of Embodiment 1 or Embodiment 2, deformation of the outermost corrugated fin during production and transportation (fin distortion) can be prevented. Thereby, the beauty of a product can be prevented from being damaged.

Since the corrugated fins can be arranged on the outermost side even if the side plates or side sheets are removed, the heat dissipation area can be increased compared to the case where the outermost corrugated fins are also removed after the side plates or side sheets are removed. have.

When the parallel flow type heat exchanger is used in the side flow, when the protective plate (side plate or side sheet) is at the bottom, it is difficult to drain from the corrugated fins, and water gradually accumulates and the ventilation of the heat exchanger is hindered. When the corrugations of the lowermost corrugated fins are overlapped in the shape of a louver, and the protection plate is not provided on the outside thereof, the defrost water and the condensation water do not stop by the protection plate and flow down so as not to disturb the ventilation of the heat exchanger.

As mentioned above, although each embodiment of this invention was described, the scope of the present invention is not limited to this, It can implement by making a various change in the range which does not deviate from the summary of invention. For example, it is not a requirement that the number of refrigerant passages in the flat tube be plural. The number of refrigerant passages may be one.

1A, 1B: heat exchanger
2, 3: header pipe
4: flat tube
5: refrigerant passage
6: corrugated pin
6a: outermost corrugated pin
7, 8: refrigerant entrance

Claims (3)

As a heat exchanger,
A plurality of header pipes arranged in parallel at intervals,
A flat tube disposed between the plurality of header pipes and having a refrigerant passage provided therein in communication with the header pipe;
Corrugated fins disposed between the flat tubes,
An outermost corrugated fin provided on a flat surface facing outward of a flat tube positioned at the outermost side among the plurality of flat tubes,
The said outermost corrugated fin is a shape in which wrinkles overlap in the louver shape, The heat exchanger characterized by the above-mentioned. The method of claim 1,
The plurality of flat tubes are arranged in the longitudinal direction in the vertical direction, the heat exchanger, characterized in that the outermost corrugated fin extends obliquely downward in the downward direction. The method of claim 1,
The plurality of flat tubes are arranged with the longitudinal direction in the horizontal direction, and at least the lowest corrugated fin among the outermost corrugated fins has a shape in which wrinkles overlap in a louver shape. .

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