JP6944395B2 - Heat source machine - Google Patents

Description

An embodiment of the present invention relates to a heat source machine including a plurality of heat exchangers.

Conventionally, for example, as a refrigerating machine connected to an outdoor unit of an air conditioner or a refrigerating showcase, a heat source machine provided with a plurality of heat exchangers may be adopted. In the case of such a heat source machine having a relatively large size, heat exchangers may be arranged on a plurality of surfaces along the outer edge of the heat source machine as in Patent Document 1, for example. At this time, the heat exchanger is bent in a curved shape at the corners of the heat source machine so as to be along the surface to be arranged.

Japanese Unexamined Patent Publication No. 2016-180543

However, when the heat exchanger is bent, there is a problem that a gap is formed in the corner portion of the heat source machine in which the heat exchanger does not exist, and the corner portion cannot be effectively used for heat exchange.
Therefore, we provide a heat source machine that can effectively utilize the corners and improve the heat exchange performance.

The heat source machine of the embodiment is a heat source machine including a blower and a plurality of heat exchangers blown by the blowers, and each heat exchanger is arranged along the outer peripheral surface of the heat source machine and at least one. The portions are formed in a flat plate shape, and the ends of the flat plate-shaped portions are arranged to face each other at the corners of the heat source machine, and the opposed ends of the flat plate-shaped portions face the inside of the heat source machine. It is characterized in that it has an inclined shape.

The figure which shows typically the appearance of the heat source machine of embodiment The figure which shows the structure of the heat source machine schematically The figure which shows the structure of the heat exchanger schematically The figure which shows typically the arrangement mode of the heat exchanger at the corner part. It is a comparative example, and is the figure which shows typically the arrangement mode of the corner part by a conventional structure. The figure which shows the other configuration of the heat source machine schematically.

Hereinafter, embodiments will be described with reference to the drawings.
As shown in FIG. 1 as perspective views from the front side and the back side, the heat source machine 1 of the present embodiment has a front panel 2 forming an outer shell on the front side, left and right side surfaces and a back side from both ends on the front side. It is formed in a substantially rectangular parallelepiped shape by a plurality of heat exchangers 3 forming an outer shell. In the present embodiment, two blow-out type blowers 4 are provided above the heat source machine 1. The blower 4 drives, for example, a propeller fan by a motor, and is configured to blow out from an outlet that opens upward of the heat source machine 1.

Further, the heat source machine 1 has a connecting member 7 that connects a product base 5 as a base structure and a fan base 6 as an upper structure on which each blower 4 is mounted at two corners on the back side. Is provided. A heat exchanger 3 is also connected to the connecting member 7 as described later.

As shown in FIG. 2, the heat source machine 1 is arranged so that the front panel 2 and the heat exchanger 3 form an outer shell, and a storage space 8 for accommodating various devices and devices is formed inside the heat source machine 1. ing. The accommodation space 8 accommodates equipment such as a compressor 9, an accumulator 10, an oil separator 11, a receiver tank 12, and a control device 13 that form a so-called refrigeration cycle. Further, as a result of enlarging the outer shape of the blower 4 and reducing the size of the heat source machine 1 in order to increase the air volume, the outer shape of the blower 4 is large enough to cover the heat exchanger 3 when the center point is O. And are placed in position.

The front panel 2 forms an outer shell on the front side of the heat source machine 1 by closing an opening provided on the front side of the heat source machine 1 for installation and maintenance of these devices. In FIG. 2, for the sake of simplification of the description, the wiring and piping connecting each device are not shown.

As shown in FIG. 3, the heat exchanger 3 has a long side whose length is set to L1 and a short side whose length is set to L2, which is shorter than the long side. The one formed in an L shape with the short side bent is adopted. In other words, at least a part of the heat exchanger 3 is formed in a flat plate shape, and the flat plate-shaped portion has a long side formed in a straight line having a length L1 in a horizontal cross-sectional view. This long side corresponds to an L-shaped long side. Further, the heat exchanger 3 has a short side having a length of L2 bent from one end of the long side. This short side corresponds to an L-shaped short side. In this embodiment, L1 is set shorter than 900 mm, and L2 is set shorter than half of L1.

The heat exchanger 3 is a so-called fin tube type having a plurality of thin plate-shaped fins 14 arranged at predetermined intervals and a tube 15 inserted so as to penetrate the fins 14 in the thickness direction. belongs to. Further, in the present embodiment, the heat exchanger 3 has a multi-layer structure in which a plurality of tubes 15 are arranged in a plurality of rows in the width direction of the fins 14. Hereinafter, for convenience, the portion of the heat exchanger 3 corresponding to the innermost tube 15 is referred to as the first layer 3A, the portion next to the portion corresponding to the innermost tube 15 is referred to as the second layer 3B, and the outermost portion is referred to as the third layer 3C.

Further, in the heat exchanger 3, the end of the long side, that is, the end of the linear portion in the horizontal cross-sectional view is arranged on the L-shaped bending direction side (arranged in the heat source machine 1) according to the number of rows of the tubes 15. It is formed in a stepped shape in which the length becomes shorter toward the inside). An end plate 16 (see FIG. 4) is provided at each of the stepped ends. The end plate 16 is formed of a metal material or the like having a higher rigidity than the fin 14, and maintains the shape of the heat exchanger 3. It should be noted that the end portion of the flat plate-shaped portion may be formed not in a stepped shape but in an inclined shape in which the fins 14 are gradually shortened toward the inside of the heat source machine 1. Further, the fin 14 itself may be inclined toward the end side.

Each tube 15 has a structure in which the end of the long side is simply folded back, while the end of the short side is connected to each other or an external pipe is connected. Therefore, it is sufficient that there is a very small space on the end side of the long side that can be folded back, and the folded tube 15 can be used up to the last minute position, whereas the end side of the short side is for piping to some extent. Space (R) is required.

In the case of the present embodiment, the heat exchangers 3 having such a configuration are formed by stacking two layers in the height direction of the heat source machine 1 at four locations so as to form an outer shell of the heat source machine 1 as shown in FIG. Is located in. Therefore, the heat source machine 1 is provided with a total of eight heat exchangers 3. At this time, the heat exchangers 3 are arranged at corresponding locations by changing the directions of the heat exchangers 1 formed in the same shape in the vertical direction or the horizontal direction of the heat source machine 1. More specifically, the two L-shaped heat exchangers 3 of the present embodiment face the ends of the long sides below one blower 4 so that the long sides form an angle of approximately 90 degrees. They are arranged symmetrically, and are further arranged in two layers in the vertical direction. That is, when viewed as a whole of the heat source machine 1, the heat exchanger 3 has a divided structure arranged along the height direction of the heat source machine 1 and the outer peripheral surfaces of the front, back, left, and right. At this time, each heat exchanger is arranged so that the long L-shaped side forms the outer peripheral surfaces on the back surface side and the side surface side of the heat source machine 1.

Further, as shown in detail in FIG. 4, the heat exchanger 3 is arranged so that the ends of the flat plate-shaped portions face each other at the corners of the heat source machine 1. Specifically, the end plate 16 provided in the heat exchanger 3 has a main body portion parallel to the fin 14 and two arm portions bent so as to be parallel to the tube 15 from the main body portion. It is formed in a U shape having. A mounting hole 16a for mounting a screw or a rivet is formed on this arm. Further, the end plates 16 of the first layer 3A, the second layer 3B, and the third layer 3C are fixed to each other by a sheet metal member (not shown). The other end of the heat exchanger 3, which is bent in an L shape, is also fixed by an end plate.

The heat exchange device is connected to the connecting member 7 by bolts, rivets, welding, or the like by using the mounting holes 16a of the end plate 16 of the third layer 3C, which is the outermost layer. At this time, each of the heat exchangers 3 arranged in two layers above and below is connected to the connecting member 7 by using the end plate 16. The heat exchanger 3 extending in the vertical direction shown in the figure forming the outer shell on the side surface side at the corner of the heat source machine 1 and the heat exchanger 3 extending in the horizontal direction shown in the drawing forming the outer shell on the back side are also connected to the connecting member 7, respectively. ing.

As a result, each heat exchanger 3 can be fixed at a position forming the outer shell of the heat source machine 1, and the fins 14 of each heat exchanger 3 can be arranged at the position just before the connecting member 7. That is, the heat transfer area at the corner can be increased. Although FIG. 4 shows the state of the corner portion on the right back side of the heat source machine 1, each heat exchanger 3 is similarly connected to the connecting member 7 at the corner portion on the left back side of the heat source machine 1. ing.

Next, the operation of the above configuration will be described.
As mentioned above, there is a problem that the corners cannot be effectively used for heat exchange in the past, and in the case of a relatively large one, there is a problem that the heat exchange performance is deteriorated by the structure such as a pillar provided at the corner. be.

Therefore, in the heat source machine 1 of the present embodiment, at least a part of each heat exchanger 3 is formed in a flat plate shape, and the end portion of the flat plate-shaped portion is inclined toward the inside of the heat source machine 1. It has an inclined shape, and the ends of the flat plate-shaped portions are arranged at the corners of the heat source machine 1 so as to face each other. Since the ends of the flat plate-shaped portions of the heat exchanger 3 are inclined and face each other, the facing surfaces may be formed substantially parallel, and the widths of the gaps may be formed substantially the same.

As a result, as shown in FIG. 4, in the corner portion of the heat source machine 1, the end portion of the heat exchanger 3 forming the outer shell on the side surface side and the end portion of the heat exchanger 3 forming the outer shell on the back surface side are brought close to each other. In each heat exchanger 3, the fins 14 that contribute to heat exchange can be arranged on the connecting member 7 to the last minute position, that is, the heat transfer area at the corners can be increased. become.

As a result, in the conventional heat exchanger 103 having a curved shape shown as Comparative Example 1 in FIG. 5, there are gaps at the corners, and it is necessary to provide a relatively large columnar structure 104, which increases the ventilation resistance. On the other hand, according to the heat source machine 1 of the present embodiment, the heat exchange area is larger than that of the heat exchanger formed in an arc shape by arranging the end portion of the heat exchanger 3 up to the gap portion, and the columns are formed. It is possible to reduce the influence of the structure 104 as a blower resistance, and it is possible to efficiently exchange heat at the corners.

Further, when the conventional heat exchanger 105 having a flat end portion shown as Comparative Example 2 in FIG. 5 is opposed to each other, there is a large space between the corners, especially the connecting member 7, for heat exchange. On the other hand, according to the heat source machine 1 of the present embodiment, since the facing portions are inclined, they are formed in a stepped shape in particular, so that heat exchange is efficiently performed at the corners. Can be done.

According to the heat source machine 1 described above, the following effects can be obtained.
The heat source machine 1 includes a plurality of heat exchangers 3, and each heat exchanger 3 is arranged along the outer peripheral surface of the heat source machine 1 and at least a part thereof is formed in a flat plate shape, and the corners of the heat source machine 1 are formed. In the portion, the ends of the flat plate-shaped portion are arranged so as to face each other, and the opposed ends of the flat plate-shaped portion are inclined toward the inside of the heat source machine 1.

As a result, the fins 14 of each heat exchanger 3 can be arranged on the connecting member 7 to the last minute position. As a result, the corners that have been gaps in the past can be effectively utilized, and the heat transfer area at the corners increases, so that the heat exchange performance can be improved.

Further, by inclining the end portion, the ventilation resistance by the fins 14 is also reduced at the portion facing the heat exchanger 3, the wind speed is increased and the air volume is also increased, so that the heat exchange performance is further improved. Can be done.

Further, since the end portions of the flat plate-shaped portions to be arranged facing each other need only have a space for folding back the tube 15 as described above, the heat exchangers 3 are arranged very close to each other even when they are arranged facing each other. Since the heat source machine 1 can be prevented from becoming large and the other end side of the heat exchanger 3 is located in the accommodation space 8, the space required for piping can be secured and the piping work can be easily performed. Can also be done.

The heat source machine 1 includes a plurality of heat exchangers 3, and each heat exchanger 3 is formed in an L shape having a long side and a short side shorter than the long side, and is a corner of the heat source machine 1. The ends of the long sides, which are flat plates, are arranged so as to face each other.

Even with such a configuration, the fins 14 of each heat exchanger 3 can be arranged on the connecting member 7 to the limit position in the limited space at the corner. As a result, the corners that have been gaps in the past can be effectively utilized, and the heat transfer area at the corners increases, so that the heat exchange performance can be improved.

Further, by forming the heat exchanger 3 into a divided structure, in the heat source machine 1 which is expected to be relatively large, the transfer equipment at the time of assembly can be miniaturized or simplified, and each heat exchanger can be miniaturized or simplified. Since the weight is reduced in view of No. 3, the assembly work can be easily and efficiently performed.

The heat exchanger 3 is a fin 14 tube 15 type having a plurality of thin plate-shaped fins 14 arranged at predetermined intervals and a tube 15 inserted into the fins 14, and the tube 15 is a fin. A plurality of rows are provided in the width direction of 14, and the ends of the flat plate-shaped portions of the heat exchanger 3 are formed in a stepped shape that becomes shorter toward the inside according to the number of rows of the tubes 15.

As a result, the ventilation resistance by the fins 14 is reduced at the portion where the heat exchanger 3 is opposed to each other, the wind speed is increased, and the air volume is also increased, so that the heat exchange performance can be further improved. Further, since it is not necessary to provide a large support structure in the flow direction of the air passing through the heat exchanger 3, there is no ventilation resistance at the time of blowing air, and it is possible to prevent the heat exchange performance from being deteriorated by the support structure. can.

The heat exchangers 3 are arranged so as to be overlapped with each other in the height direction of the heat source machine 1. That is, the heat exchanger 3 has a divided structure with respect to the height direction of the heat source machine 1. As a result, as described above, the transport equipment at the time of assembly can be miniaturized or simplified, and the assembly work can be easily and efficiently performed.

The heat exchangers 3 are each formed to have the same shape, and are arranged so that the heat source machine 1 is oriented in the vertical direction or the horizontal direction. That is, the heat exchanger 3 has a divided structure with respect to at least one of the height direction of the heat source machine 1 and the direction along the outer shell. As a result, as described above, the transport equipment at the time of assembly can be miniaturized or simplified, and the assembly work can be easily and efficiently performed. Further, since a plurality of heat exchangers 3 formed in the same shape are used, the equipment for manufacturing the heat exchangers 3 can be standardized, and the manufacturing cost can be reduced.

Further, by arranging the heat exchangers 3 formed in an L shape at the corners of the heat source machine 1 so as to be symmetrical with each other on the long sides, the diagonal portions of the corners are L of the heat exchanger 3. Since a gap is formed by the short side of the character, the inside of the heat source machine 1 can be accessed without removing the heat exchanger 3 during maintenance. As a result, it is possible to reduce the manufacturing cost of the heat exchanger while using the heat exchanger over a wide range on the outer peripheral surface, and it is possible to obtain the heat source machine 1 with high maintainability.

The heat source machine 1 is provided at a corner of the heat source machine 1 and supports the upper surface structure by connecting the upper surface structure arranged on the upper surface of the heat source machine 1 and the base structure on which the heat source machine 1 is placed. At the same time, a connecting member 7 is provided to which the end portions of the flat plate-shaped portion of the heat exchanger 3 are connected.

By fixing the upper structure and the base structure of the heat source machine 1 and the respective heat exchangers 3 by the connecting member 7, it is not necessary to provide a separate support structure, and it is possible to provide ventilation resistance at the time of blowing air. It is possible to prevent the heat exchange performance from being deteriorated due to the loss.

In the embodiment, the heat source machine 1 provided with a total of eight heat exchangers 3 has been described as an example, but as shown in FIG. 6, the heat exchangers 3 are stacked in two upper and lower stages, and the corners are flat. It is also possible to arrange the ends of the portions so as to face each other, and to have a configuration such as a heat source machine 1 provided with one blower 4 at the top. In this case, each heat exchanger 3 may be formed in the same shape and may be arranged in different directions up and down or left and right.

Even with such a configuration, as described above, the fins 14 of each heat exchanger 3 can be arranged to the position of the connecting member 7 to the limit, and the corners which have been gaps in the past can be effectively utilized. At the same time, the heat transfer area at the corners is increased, so that the heat exchange performance can be improved. Further, by stepping or inclining the end portion, the ventilation resistance by the fins 14 is reduced at the portion facing the heat exchanger 3, the wind speed is increased, and the air volume is also increased, so that the heat exchange performance is further improved. You can also do it.

Further, since the outer shape of the blower 4 is arranged in such a size and position that it can be applied to the heat exchanger 3 in a plan view, it is possible to increase the size of the blower 4 to increase the air volume. The heat source machine 1 can be miniaturized.

Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

In the drawing, 1 is a heat source machine, 3 is a heat exchanger, 4 is a blower, 5 is a product base (base structure), 6 is a fan base (superstructure), 7 is a connecting member, 14 is a fin, and 15 is a tube. Is shown.

Claims (6)

A heat source machine including a blower and a plurality of heat exchangers blown by the blower.
The heat exchanger is a fin tube type having a plurality of thin plate-shaped fins arranged at predetermined intervals and a tube inserted into the fins.
The tubes are provided in a plurality of rows in the width direction of the fins.
Each of the heat exchangers is arranged along the outer peripheral surface of the heat source machine, and at least a part of the heat exchanger is formed in a flat plate shape, and the ends of the flat plate-shaped portions are opposed to each other at the corners of the heat source machine. The flat plate-shaped portion of the heat exchanger is shortened toward the inside according to the number of rows of the tubes, and the end portion is formed in a stepped shape, and the opposite end portion of the flat plate-shaped portion is the heat source. A heat source machine characterized by having an inclined shape that inclines toward the inside of the machine. A heat source machine including a blower and a plurality of heat exchangers blown by the blower.
Each of the heat exchangers is arranged along the outer peripheral surface of the heat source machine, and at least a part of the heat exchanger is formed in a flat plate shape, and the ends of the flat plate-shaped portions are opposed to each other at the corners of the heat source machine. Each end of the flat plate-shaped part is formed shorter toward the inside and has an inclined shape that inclines toward the inside of the heat source machine. A heat source machine characterized by facing each other. Each of the heat exchangers is formed in an L-shape having a long side and a short side shorter than the long side in cross section, and is an L-shaped long side which is a flat plate-shaped portion at a corner of the heat source machine. The heat source machine according to claim 1 or 2, wherein the ends of the heat source machine are arranged so as to face each other. The heat source machine according to any one of claims 1 to 3, wherein the heat exchangers are arranged so as to be overlapped with each other in the height direction of the heat source machine. The heat source machine according to any one of claims 1 to 4, wherein each of the heat exchangers is formed in the same shape and is arranged. The upper surface structure provided at the corner of the heat source machine and arranged on the upper surface of the heat source machine and the base structure on which the heat source machine is placed are connected to support the upper surface structure and the heat exchanger of the heat exchanger. The heat source machine according to any one of claims 1 to 5, further comprising a connecting member to which the ends of the flat plate-shaped portions are connected.

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