JPH09229467A - Heat-exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a processing amount for a heat transfer pipe, the size of a device inserted in and secured to a fin, and an equipment cost. SOLUTION: A heat-exchanger 11 comprises L-shaped heat-exchanger cores 11a and 11b. A number of fins 12a and 12b are laminated in front and rear rows and heat transfer pipes 13a and 13b are inserted classified by a row in such a state to cross the fins 12a and 12b at right angles. A header 14 wherein the heat transfer pipe 13a is connected to form a refrigerant flow passage is arranged on the rear row side at one end of the heat-exchanger 11a. On the front row side at the aforesaid end, a plurality of capillary tubes 16 divided from a flow divider are connected to the heat transfer pipe 1a to form the inlet of a refrigerant flow passage. The end part of the heat transfer pipe 13a at the other end of the heat-exchanger core 11a is bent in an L-shaped state and joined with the heat transfer pipe 13b at one end of the heat-exchanger core 11b, and the heat transfer pipes 13a and 13b form a series of flow passage. Since a large heat-exchanger 11 is formed such that small heat-exchangers 11a and 11b are joined together, coping with a situation is effected by a small processing and manufacturing device.

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 for refrigeration equipment, air conditioning equipment and the like.

[0002]

2. Description of the Related Art In recent years, refrigeration equipment and air conditioning equipment have tended to be miniaturized, but on the other hand, from the viewpoint of energy saving, it is necessary to enlarge the heat exchanger.

For example, a heat exchanger of a ceiling-embedded air conditioner is installed in a quadrangular shape so as to surround a fan as disclosed in Japanese Patent Laid-Open No. 6-281188.

Details of the conventional heat exchanger will be described below with reference to FIGS. 5 to 8. 5 is a plan sectional view of a ceiling-embedded air conditioner in which a conventional heat exchanger is incorporated, and FIG. 6 is a perspective view of only the heat exchanger of FIG.

5 and 6, a large number of fins 32 are stacked in front and rear rows of the heat exchanger 31, and the heat transfer tubes 33 are inserted in each row orthogonal to the fins 32, and the rear row of one end of the heat exchanger 31. A header 34 is provided on the side, and a heat transfer tube 33 is connected to the header 34 to form a refrigerant flow path.
On the other hand, on the front row side at the same end, a plurality of capillary tubes 36 coming out of the flow divider 35 are connected to the heat transfer tube 33,
It is the inlet of the coolant channel.

The heat exchanger 33 is a ceiling-embedded air conditioner 37.
When installed in, the fan is arranged in a quadrangle leaving a corner so as to surround the fan 38 arranged in the center of the ceiling-embedded air conditioner 37. Air blowout ports 37a are provided on the outer four sides of the heat exchanger 31.

Next, a method of manufacturing the heat exchanger 31 will be described with reference to FIGS. First, as shown in FIG. 7, the fins 32 are horizontally stacked in front and rear rows, and the heat transfer tubes 33 are inserted into and closely attached to the fins 32. At this time, the stacked length of the fins 32 on the front row side is shorter than that on the rear row side. Next, as shown in FIG. 8, the heat exchanger 31 is sequentially curved to form a rectangular heat exchanger 3.
Let it be 1. Due to the difference in the fin stacking length between the front and rear rows, the fin ends are aligned after the bending.

[0008]

However, the problem of the above-mentioned conventional heat exchanger 31 is that the heat exchanger 31 becomes long as a whole, and therefore the device for processing the heat transfer tube 33 and the fin 32 for the heat transfer tube 33 are processed. The equipment for inserting and adhering becomes large and the capital investment becomes large. Further, when the heat exchanger is curved, it is necessary to invest a bending device according to each shape.

In the ceiling-embedded air conditioner 37, almost no air flows in the corners where the outlet 39 is not provided, and the fins 32 at the corners of the rectangular heat exchanger 31 are wasted.

[0010]

The heat exchanger of the present invention is constructed by connecting a plurality of heat exchanger cores, and the connecting points are formed at corners.

As a result, even when a long heat exchanger is manufactured, the device for processing the heat transfer tube and the device for inserting or closely contacting the heat transfer tube with the fin do not become large in size, and the capital investment does not become large. Further, since the connecting portions are formed at the corners, the fins are not wasted.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A heat exchanger according to claim 1 of the present invention comprises a plurality of fins and a plurality of heat transfer tubes inserted perpendicularly to the fins. The heat exchanger cores are arranged side by side in the fin stacking direction, and all the heat transfer tubes at the ends of the respective heat exchanger cores adjacent to the other heat exchanger cores are connected to the heat transfer tubes of the adjacent heat exchanger cores. The heat transfer tubes at both ends of the heat exchanger core, which are integrated with each other and are not adjacent to the other heat exchanger cores, have inlets and outlets of the refrigerant flow path, and the other heat transfer tubes connect at least two or more heat transfer tubes. Since the total heat exchanger core constitutes the integrated refrigerant flow path,
By increasing the number of heat exchanger core connections, it is possible to manufacture a heat exchanger having a length that is multiple times the length of the heat exchanger core.
In this case, the device for processing the heat transfer tube and the device for inserting or closely contacting the heat transfer tube with the fins can be small-sized for the heat exchanger core, and the equipment investment can be suppressed.

The heat exchanger according to the second aspect of the present invention is a plurality of heat exchanges, each of which is composed of a plurality of fins stacked and a plurality of heat transfer tubes inserted orthogonally to the fins. The heat exchanger cores are arranged side by side in the fin stacking direction, and all the heat transfer tubes at the ends of the respective heat exchanger cores adjacent to the other heat exchanger cores are bent by bending at least one of the heat transfer tubes. The heat transfer tubes are connected to and integrated with each other, and the heat transfer tubes at the ends not adjacent to the other heat exchanger cores at both ends of the heat exchanger core have inlets and outlets of the refrigerant flow path, and the other heat transfer tubes are at least two or more. The total heat exchanger core is bent by connecting the heat transfer tubes to form an integral refrigerant flow path, so by increasing the number of heat exchanger core connections, the length of the heat exchanger core is multiple times the length. It is possible to manufacture a heat exchanger of
A device for processing the heat transfer tube and a device for inserting or closely contacting the heat transfer tube with the fins can be a small one for the heat exchanger core, and the capital investment can be suppressed. Further, it is not necessary to have a bending apparatus adapted to various shapes of the heat exchanger, and it is possible to cope with many shapes only by bending the heat transfer tube. Further, in a heat exchanger such as a ceiling-embedded air conditioner, since there is no blowout port, it is not necessary to provide fins at the corners where almost no air flows, so the material cost is low.

Further, the heat exchanger of the present invention according to claim 3 of the present invention comprises a plurality of heat exchanges composed of a plurality of laminated fins and a plurality of heat transfer tubes inserted orthogonally to the fins. The heat exchanger cores are arranged side by side in the fin stacking direction, and all the heat transfer tubes at the ends of the respective heat exchanger cores adjacent to the other heat exchanger cores are connected to the heat transfer tubes of the adjacent heat exchanger cores through the connecting tubes. The heat transfer pipes of the ends that are connected to each other and that are not adjacent to the other heat exchanger cores at both ends of the heat exchanger core have the inlet and outlet of the refrigerant flow path,
Since the other heat transfer tubes form an integral refrigerant flow path by connecting at least two heat transfer tubes, increasing the number of heat exchanger core connections increases the length of the heat exchanger core by multiple times. Heat exchanger can be manufactured, and in this case, the device for processing the heat transfer tube and the device for inserting or closely contacting the heat transfer tube with the fins can be a small one for the heat exchanger core. Therefore, the capital investment can be suppressed. In addition, the shape of the heat exchanger can be changed simply by changing the shape of the connecting pipes, and the heat exchanger core and connecting pipes can also be used together for mass production, and by combining them, the shape of the heat exchanger can be adjusted according to need. It is possible to reduce the capital investment as well as to reduce the switching man-hours by mass production of standard shapes.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a plan sectional view of a heat exchanger according to Embodiment 1 when incorporated into a ceiling-embedded air conditioner. FIG. 2 is a perspective view of only the heat exchanger of FIG.

1 and 2, the heat exchanger 11 is composed of an L-shaped heat exchanger core 11a and a heat exchanger core 11b, and a large number of fins 12a and 12b are stacked in the front and rear rows, respectively, to form a heat transfer tube 13a. , 13b are inserted orthogonally to the fins 12a, 12b in each row, and the heat exchanger core 11a
A header 14 used as a merger is provided on the rear row side of one end of the, and a heat transfer tube 13a is connected to the header 14 to form a refrigerant flow path. On the other hand, on the front row side at the same end, a plurality of capillary tubes 16 coming out of the flow distributor 15 are connected to the heat transfer tube 13a and serve as an inlet of the refrigerant flow path. Here, the end portion of the heat transfer tube 13a at the other end of the heat exchanger core 11a is bent into an L shape to form the heat exchanger core 11b.
Is joined to the heat transfer tube 13b at one end thereof, and the heat transfer tube 13a and the heat transfer tube 13b form a series of refrigerant flow paths.

The heat exchanger 11 is a ceiling-embedded air conditioner 17.
Is installed in the ceiling-embedded air conditioner 17, and is curved in a quadrangle leaving a corner so as to surround the fan 18 arranged in the center of the ceiling-embedded air conditioner 17. In addition, the ceiling-embedded air conditioner 17
There are four air outlets 17a on the four sides.

The operation of the heat exchanger 11 constructed as above will be described. In the large heat exchanger 11, the relatively small heat exchanger core 11a and the heat exchanger core 11b join the heat transfer tubes at one end to each other. Therefore, a device for processing a large heat transfer tube or a heat transfer tube is used. The device for inserting or closely contacting with the fin can be made small, and equipment investment can be suppressed. In the case of this embodiment, the heat exchanger 11a,
A device for bending 11b into an L-shape is required, but a relatively common L-shape bending device (not shown) as shown in Japanese Patent Laid-Open No. 63-18,089 and an inexpensive heat-transfer tube bending process, for example. A square heat exchanger 11 can be manufactured with only an apparatus, and an expensive apparatus for exclusive use of square bending is not required.

In addition, each heat exchanger core 11a, 1
1b constitutes a series of refrigerant flow passages, so that the header 14, the flow distributor 15, and the capillary tube 1 which serve as a confluent device
6 may be one place.

Further, since there are no fins 12a and 12b at the joints with the heat exchanger cores 11a and 11b, the amount of heat exchange is reduced, and since the air resistance is small, a large amount of air easily flows locally. There is concern about that, but that part corresponds to the corner of the ceiling-embedded air conditioner 17, and the air conditioner 17
Since there is no air outlet 17a, air does not flow easily, and there is no concern that the heat exchange amount will decrease or a large amount of air will flow locally, so that the fin material can be efficiently reduced.

As described above, in this embodiment, the end portion of the heat transfer tube 13a of the heat exchanger core 11a is bent into an L shape and is joined to the heat transfer tube 13b of the heat exchanger core 11b, so that the heat exchange amount It is possible to provide a quadrangular large-sized heat exchanger 11 that can be manufactured by a small manufacturing apparatus without lowering or a large amount of air locally flowing and that has a reduced material cost.

(Second Embodiment) FIG. 3 is a plan sectional view of a heat exchanger according to a second embodiment when it is incorporated in a ceiling-embedded air conditioner. FIG. 4 is a perspective view of only the heat exchanger of FIG.

3 and 4, the heat exchanger 21 is composed of an L-shaped heat exchanger core 21a and a heat exchanger core 21b, and a large number of fins 22a and 22b are stacked in the front and rear rows, respectively, and the heat transfer tube 23a is formed. , 23b are inserted orthogonally to the fins 22a, 22b in each row, and the heat exchanger core 21a
A header 24 used as a merger is provided on the rear row side of one end of the above, and a heat transfer pipe 23a is connected to the header 24 to form a refrigerant flow path. On the other hand, on the front row side at the same end, a plurality of capillary tubes 26 extending from the flow distributor 25 are connected to the heat transfer tube 23a and serve as an inlet of the refrigerant flow path. Further, the end portion of the heat transfer tube 23a at the other end of the heat exchanger core 21a and the heat transfer tube 2 at one end of the heat exchanger core 21b.
3b is connected and joined via an L-shaped connecting pipe 21c, and the heat transfer pipe 23a and the heat transfer pipe 23b form a series of refrigerant flow paths.

The heat exchanger 21 is a ceiling-embedded air conditioner 27.
Is installed in the ceiling-embedded air conditioner 27, and is curved in a quadrangle leaving a corner so as to surround the fan 28 arranged in the center of the ceiling-embedded air conditioner 27. In addition, the ceiling-embedded air conditioner 27
There are four air outlets 27a on the four sides.

The operation of the heat exchanger 21 constructed as above will be described. In the large heat exchanger 21, the relatively small heat exchanger core 21a and the heat exchanger core 21b join the heat transfer tubes at one end to each other, so that the heat exchanger 21 can be manufactured by a small manufacturing apparatus. It requires less equipment investment. Also in the case of this embodiment, the heat exchangers 21a and 21b
Although a device for bending L into an L shape is required, a device dedicated to rectangular bending is not required as in the first embodiment.

Further, each heat exchanger core 21a, 2
1b constitutes a series of refrigerant flow paths, so that a header 24, a flow distributor 25, and a capillary tube 2 which serve as a confluent device
6 may be one place.

Further, since the fins 22a and 22b are not provided at the joints with the heat exchanger cores 21a and 21b, the amount of heat exchange is reduced, and since the air resistance is low, a large amount of air easily flows locally. There is concern about that, but that part corresponds to the corner of the ceiling-embedded air conditioner 27, and the outlet 27
The absence of “a” makes it difficult for air to flow, and there is no concern that the heat exchange amount will decrease or a large amount of air will flow locally, so that the fin material can be efficiently reduced.

Further, since the fins 22a and 22b of the heat exchanger cores 21a and 21b and the heat transfer tubes 23a and 23b can be manufactured in exactly the same process with the same parts, the number of man-hours for switching can be reduced by mass production of standard shapes.

As described above, in this embodiment, the heat exchanger core 21 is
a and the heat exchanger core 21b, the heat transfer tubes 23 at one end respectively
By joining a and 23b, it is possible to manufacture a heat exchanger with a small manufacturing device without a decrease in heat exchange amount or a large amount of air flowing locally, and a square heat with reduced material cost. The exchanger 21 can be provided.

In this embodiment, the L-shaped connecting pipe 2
A quadrangular heat exchanger was constructed using 3c and the L-shaped heat exchanger cores 21a and 21b.
A quadrangular heat exchanger can be configured by using individual and L-shaped connecting pipes, and heat exchangers of various shapes can be configured by combining various shapes of connecting pipes and heat exchanger cores, thereby exchanging heat. It can also be used as a container core, and mass production of standard shapes can reduce capital investment and switching man-hours.

[0031]

As described above, in the heat exchanger of the present invention, a plurality of heat exchanger cores each including a plurality of laminated fins and a plurality of heat transfer tubes inserted orthogonally to the fins are fins. All heat transfer tubes provided in the stacking direction and adjacent to the other heat exchanger cores of each heat exchanger core are connected to and integrated with the heat transfer tubes of the adjacent heat exchanger cores to form a heat exchanger. The heat transfer tubes at the ends that are not adjacent to the other heat exchanger cores at both ends of the core have inlets and outlets of the refrigerant flow path, and other heat transfer tubes connect at least two or more heat transfer tubes to form a total heat exchanger core. Since the device for processing the heat transfer tube and the device for inserting or closely contacting the heat transfer tube with the fins are configured in a small size by configuring the integrated refrigerant flow path, the equipment investment can be suppressed.

Further, in the heat exchanger of the present invention, a plurality of heat exchanger cores each including a plurality of fins stacked and a plurality of heat transfer tubes inserted orthogonally to the fins are arranged in the fin stacking direction. All heat transfer tubes at the end of each heat exchanger core adjacent to other heat exchanger cores are integrated by connecting at least one heat transfer tube and connecting it with the heat transfer tubes of the adjacent heat exchanger cores. , The heat transfer tubes at both ends of the heat exchanger core, which are not adjacent to the other heat exchanger cores, have inlets and outlets of the refrigerant flow path, and the other heat transfer tubes connect at least two or more heat transfer tubes for total heat Since the exchanger core is bent to form an integral refrigerant flow path, the device for processing the heat transfer tube and the device for inserting or closely contacting the heat transfer tube with the fins can be made small, and the device for bending the heat exchanger Can be simplified and the capital investment can be suppressed. That.

Further, in the heat exchanger of the present invention, a plurality of heat exchanger cores each including a plurality of laminated fins and a plurality of heat transfer tubes inserted orthogonally to the fins are arranged in the fin laminating direction. All heat transfer tubes at the end of each heat exchanger core adjacent to the other heat exchanger cores are connected to the heat transfer tubes of the adjacent heat exchanger cores through connecting tubes, The heat transfer tubes at the ends that are not adjacent to the other heat exchanger cores at both ends have an inlet / outlet of the refrigerant flow path, and the other heat transfer tubes connect at least two or more heat transfer tubes to form an integral refrigerant flow path. As a result, a device for processing the heat transfer tube and a device for inserting or closely contacting the heat transfer tube with the fin can be made small. Furthermore, the shape of the heat exchanger can be changed simply by changing the shape of the connecting pipes, and the heat exchanger core and connecting pipes can also be used together for mass production. It is possible to reduce the capital investment as well as to reduce the switching man-hours by mass production of standard shapes.

[Brief description of drawings]

FIG. 1 is a plan sectional view of a ceiling-embedded air conditioner incorporating a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the heat exchanger according to the same embodiment.

FIG. 3 is a plan sectional view of a ceiling-embedded air conditioner incorporating a heat exchanger according to a second embodiment of the present invention.

FIG. 4 is a perspective view of the heat exchanger according to the same embodiment.

FIG. 5 is a plan sectional view of a ceiling-embedded air conditioner incorporating a conventional heat exchanger.

FIG. 6 is a perspective view of a conventional heat exchanger.

FIG. 7 is a perspective view of a conventional heat exchanger manufacturing process before bending.

FIG. 8: Bending device for conventional heat exchanger

[Explanation of symbols]

 11,21 heat exchanger 12a, 12b, 22a, 22b fin 13a, 13b, 23a, 23b heat transfer tube 11a, 11b, 21a, 21b heat exchanger core

Claims (3)

[Claims] 1. A plurality of heat exchanger cores each including a plurality of stacked fins and a plurality of heat transfer tubes inserted orthogonally to the fins are provided side by side in the fin stacking direction. All the heat transfer tubes at the ends of the core that are adjacent to the other heat exchanger cores are connected and integrated with the opposing heat transfer tubes of the adjacent heat exchanger cores, and the other heat exchanger cores at both ends of the heat exchanger core The heat transfer tube at the end portion not adjacent to and has an inlet / outlet of the refrigerant flow path, and the other heat transfer tubes connect at least two or more heat transfer tubes so that the total heat exchanger core constitutes an integrated refrigerant flow path. Characteristic heat exchanger. 2. A plurality of heat exchanger cores each including a plurality of stacked fins and a plurality of heat transfer tubes inserted orthogonally to the fins are provided side by side in the fin stacking direction. All the heat transfer tubes at the ends of the core adjacent to the other heat exchanger cores are bent by bending at least one of the heat transfer tubes and connected to the opposing heat transfer tubes of the adjacent heat exchanger cores to be integrated with each other. The heat transfer tubes at the ends that are not adjacent to the other heat exchanger cores at both ends have an inlet / outlet of the refrigerant flow path, and at least two or more heat transfer tubes are connected to each other so that the total heat exchanger core is bent. A heat exchanger characterized by constituting an integrated refrigerant flow path. 3. A plurality of heat exchanger cores each including a plurality of stacked fins and a plurality of heat transfer tubes inserted orthogonally to the fins are provided side by side in the fin stacking direction. All the heat transfer tubes at the ends of the core adjacent to the other heat exchanger cores are connected to the opposite heat transfer tubes of the adjacent heat exchanger cores through connecting pipes, and the other heat exchanges at both ends of the heat exchanger core The heat transfer tube at the end portion not adjacent to the reactor core has an inlet / outlet of the refrigerant flow path, and the other heat transfer tubes are connected to at least two heat transfer tubes to form an integral refrigerant flow path. Heat exchanger to.