JP2013211318A - Heat sink and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat sink which efficiently radiates heat with a simple structure, and to provide an air conditioner including the heat sink.SOLUTION: A heat sink includes: a base material 52; and multiple fins 51 connected with the base material 52. The adjacent fins 51, from among the multiple fins 51, are thermally connected with each other by at least an intermediate part 55.

Description

  The present invention relates to a heat sink for a substrate disposed in an electrical box, and an air conditioner including the heat sink.

  Generally, a heat sink that divides the inside of a housing into a heat exchange chamber that houses a heat exchanger and a machine room that houses a compressor, and dissipates the heat of a substrate placed in an electrical box placed in the machine room Is exposed to the heat exchange chamber, and the heat sink is cooled by the wind flowing through the heat exchange chamber (for example, see Patent Document 1). This type of heat sink has a configuration in which metal plates constituting a plurality of fins are arranged at intervals in the vertical direction, and the heat passing through the heat exchanger is caused to flow between the fins to dissipate the heat of the substrate. Yes.

JP 2009-186091 A

By the way, the heat sink is provided over the entire back surface of the substrate, which is the opposite surface to the mounting surface of the substrate on which the electronic component is mounted. However, an electronic component having a large amount of heat generation such as a hybrid IC (HIC) Placed locally. For this reason, the portion of the heat sink that absorbs heat from the electronic component that generates a large amount of heat is in a heat saturation state, and the heat cannot be efficiently radiated. Further, although the heat sink is provided over the entire back surface of the substrate, it has not been possible to efficiently dissipate heat using the entire heat sink.
In order to dissipate heat using the entire heat sink, it is considered that the base material of the heat sink that contacts the substrate and transfers the heat of the substrate to the fins is thickened, and after the heat is dispersed by the base material, the heat is dissipated through the fins. However, there is a problem that the weight of the heat sink increases.
An object of the present invention is to provide a heat sink capable of efficiently dissipating heat with a simple structure and an air conditioner equipped with the heat sink. .

  In order to solve the above problems, the present invention includes a base material and a plurality of fins connected to the base material, and adjacent fins among the plurality of fins are thermally connected at least at an intermediate portion. It is characterized by being.

  Moreover, the present invention is characterized in that, in the heat sink, the adjacent fins are thermally connected over a plurality of layers including an intermediate portion.

  Moreover, the present invention is characterized in that, in the heat sink, the fin has a wave shape, and a base portion of the fin is fitted in a groove of the base material.

  Moreover, the present invention is characterized in that, in the heat sink, the fins have the same shape, and the grooves of the base material are alternately formed at different depths.

  Moreover, the present invention is characterized in that, in the heat sink, the fin has a stepped shape, and a base portion of the fin is fitted in a groove of the base material.

  Moreover, the present invention is characterized in that, in the heat sink, the fin has a tube shape and is disposed so as to overlap the base material.

  Moreover, the present invention is characterized in that, in the heat sink, the fins are spiral, and are arranged on the base material.

  In order to solve the above-described problems, the present invention divides the inside of a housing into a heat exchange chamber containing a heat exchanger and a machine room containing a compressor. In an air conditioner in which a box is disposed and a heat sink of a substrate disposed in the electrical box is exposed to the heat exchange chamber, the heat sink includes a base material and a plurality of fins connected to the base material, Adjacent fins among the plurality of fins are thermally connected at least in the middle part.

  According to the present invention, a base material and a plurality of fins connected to the base material are provided, and adjacent fins among the plurality of fins are thermally connected at least at an intermediate portion. The heat transferred to the fins via the material can be transferred between the fins via the intermediate part, and the heat can be radiated from the entire heat sink efficiently by radiating heat with a simple structure. . In particular, if the size of the heating element mounted on the board and dissipating heat in contact with the heat sink is smaller than that of the heat sink, the heat can be dissipated by transferring heat uniformly to the entire area of the heat sink. It becomes.

It is an external appearance perspective view of the outdoor unit which concerns on 1st Embodiment to which this invention is applied. It is a perspective view which shows the internal structure of an outdoor unit. It is a perspective view which shows a heat sink. It is a perspective view which shows a base material. It is a perspective view which shows a fin. It is a perspective view which shows the heat sink of 2nd Embodiment. It is a perspective view which shows a fin. It is a perspective view which shows the heat sink of 3rd Embodiment. It is a perspective view which shows the heat sink of 4th Embodiment. It is a perspective view which shows the heat sink of 5th Embodiment. It is a perspective view which shows the heat sink of the modification of 5th Embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
The air conditioner according to the first embodiment of the present invention is composed of an outdoor unit 10 and an indoor unit (not shown), and allows a refrigerant to flow through a refrigerant circuit connected by a refrigerant pipe to perform a cooling operation and a heating operation. I do. The outdoor unit 10 is installed outside, exchanges heat with outdoor air, condenses the refrigerant during the cooling operation and releases heat to the outside air, and evaporates the refrigerant during the heating operation and takes in heat from the outside air. In addition, the directions such as up and down and left and right described below indicate directions when the outdoor unit 10 is viewed from the front side in a state where the outdoor unit 10 is installed.

  FIG. 1 is a perspective view of the outdoor unit 10. The outdoor unit 10 includes a substantially rectangular parallelepiped box-shaped unit case (housing) 11, and the unit case 11 includes a bottom plate 12, a ceiling panel 13, a front panel 14, and an outer plate 15. The inside of the unit case 11 is partitioned vertically by a partition plate 16 erected on the bottom plate 12, and is divided into a heat exchange chamber R1 and a machine chamber R2. The front panel 14 includes a first front panel 14A and a second front panel 14B that are divided into left and right parts with a partition plate 16 as a boundary. By removing the first front panel 14A, the operator can perform maintenance work on components in the heat exchange chamber R1 from the front side of the outdoor unit 10, and by removing the second front panel 14B, the operator can perform outdoor work. Maintenance work of parts in the machine room R2 can be performed from the front side of the unit 10.

  In addition, the first front panel 14A on the heat exchange chamber R1 side is formed with two air outlets 28 and 28 that blow out the air heat-exchanged inside the heat exchange chamber R1 in the vertical direction. The air outlets 28 and 28 are each covered with a net-like fan guard 29. Although not shown, the air outlets 28 and 28 are covered with, for example, a round flange-shaped fan cover, and a blower 22 described later is provided in the opening of the fan cover.

  FIG. 2 is a perspective view of the outdoor unit 10 with the ceiling panel 13, the front panel 14, and the outer plate 15 removed. The inside of the unit case 11 is divided into a heat exchange chamber R1 and a machine room R2 by a partition plate 16 standing on the bottom plate 12. As shown in FIG. 2, the heat exchanger 21 accommodates the heat exchanger 21 on the back side and the blowers 22 and 22 arranged in the vertical direction on the front side. The heat exchanger 21 is formed by being bent into a substantially L shape when viewed from above, and is disposed along the back surface from the left side surface (outer side surface) of the heat exchange chamber R1. Thus, the heat exchanger 21 forms the left side surface and the back surface of the heat exchange chamber R1 (that is, the unit case 11), and functions as an entire exposed surface from the left side surface to the back surface. Although not shown, the surface of the heat exchanger 21 is covered with a finger made of a resin net or the like in order to prevent a human body or the like from contacting the heat exchanger 21.

The blower 22 is attached to a pair of left and right struts 24L and 24R disposed in the heat exchange chamber R1. These struts 24L and 24R hook the upper ends of the struts 24L and 24R to the upper edge of the heat exchanger 21, respectively, and the lower ends of the struts 24L and 24R are fixed to the bottom plate 12 by screws.
The blower 22 includes a fan motor 26 fixed to the upper portions of the support posts 24L and 24R via a pedestal 25, and a propeller fan (axial fan) 27 attached to the shaft of the fan motor 26. The propeller fan 27 is disposed close to the front side of the heat exchange chamber R1. When the propeller fan 27 is rotationally driven by the fan motor 26, outside air is sucked into the heat exchange chamber R1 from the periphery of the outdoor unit 10, more specifically from the back side and the left side of the heat exchanger 21, and heat is generated. Heat is exchanged with the refrigerant flowing in the exchanger 21, and the air is discharged out of the outdoor unit 10 through the air outlets 28 and 28 provided on the front surface of the heat exchange chamber R1. That is, the outdoor unit 10 is configured as a front blowing type that blows out air after heat exchange from the front.

  Further, the machine room R2 includes a compressor 31 that constitutes a part of the refrigerant circuit, an accumulator (not shown), a receiver tank 33, an oil separator (not shown), and valves such as a four-way valve 32 and an expansion valve (not shown). A refrigerant circuit component such as a body is connected by piping, and is accommodated in a substantially lower space of the machine room R2.

  A gas pipe service valve and a liquid pipe service valve are fixed in close proximity to the upper right side of the compressor 31 and on the front side of the machine room R2. The gas pipe service valve and the liquid pipe service valve are respectively connected to a gas pipe and a liquid pipe (not shown) of unit piping extending from the indoor unit, thereby constituting a refrigerant circuit for circulating the refrigerant. Further, an electrical unit (electrical equipment box) 40 in which various electrical components such as a control board for controlling the air conditioner are disposed is disposed above the machine room R2. The electrical unit 40 includes a support member 41, a substrate 42 supported by the support member 41, and a heat sink 50 that is thermally connected to the substrate 42. The heat sink 50 is exposed to the heat exchange chamber R1 through an opening that communicates the heat exchange chamber R1 and the machine room R2 above the partition plate 16, and is provided with a plurality of fins 51 provided to protrude toward the heat exchange chamber R1. It has. Between the fins 51, air blown into the heat exchange chamber R <b> 1 through the heat exchanger 21 by the blower 22 flows as indicated by an arrow X in FIGS. 2 and 3 to improve the heat dissipation efficiency of the fins 51. I am letting.

FIG. 3 is a diagram schematically showing the configuration of the heat sink 50. As shown in FIG. 3, the heat sink 50 includes a base material 52 and a plurality of fins 51 connected to one surface 58 of the base material 52. The base material 52 and the fins 51 are formed from a highly thermally conductive material such as aluminum. The substrate 42 is thermally connected to the other surface 57 side of the base material 52. An electronic component (heating element) having a large amount of heat generation such as a hybrid IC (HIC) is mounted on the substrate 42, and the heat generated by these electronic components is radiated to the heat exchange chamber R1 side through the heat sink 50.
FIG. 4 is a diagram showing the base material 52, and FIG. 5 is a diagram showing the fins 51.
As shown in FIG. 5, the fins 51 are formed by bending a single plate material into a rectangular wave shape, and a plurality of one end portions 55 </ b> A and a plurality of other end portions 55 </ b> B are alternately arranged across the multilayer floor. Are connected to each other by a plate portion 55C. The lower end portion of the fin 51 is bent in the vertical width W1 direction to a predetermined width W2 narrower than the vertical width W1 of the rectangular wave-shaped fin 51, and a base portion 56 is formed.

  As shown in FIG. 4, the first groove (groove) 53 and the second groove (groove) 54 are alternately formed on the one surface 58 of the substrate 52. The first groove 53 and the second groove 54 are formed such that the groove widths W3 and W4 are substantially the same as the width W2 of the base portion 56 of the fin 51, respectively. The first groove 53 and the second groove 54 are formed at different depths. In other words, the first groove 53 and the second groove 54 formed by alternately changing the depth are provided on one surface 58. In the present embodiment, the groove depth D1 of the first groove 53 is formed deeper than the groove depth D2 of the second groove 54.

  The groove depth D1 of the first groove 53 is formed to be substantially the same as the length L1 of the one end portion 55A and the other end portion 55B of the fin 51, and the groove depth D2 of the second groove 54 is The first end 55A of the 51 and the length L1 of the other end 55B are approximately half the size. That is, the difference between the groove depth D1 of the first groove 53 and the groove depth D2 of the second groove 54 is the same dimension as approximately half of the length L1 of the one end portion 55A and the other end portion 55B of the fin 51. It is formed to become.

On one surface 58 of the substrate 52, a convex portion 59 is provided between the first groove 53 and the second groove 54. The width W5 of the convex portion 59 is formed to have substantially the same dimension as the difference between the vertical width W1 of the fin 51 and the width W2 of the base portion 56 of the fin 51.
As shown in FIG. 3, the plurality of fins 51 are all arranged in the same direction, and the respective base portions 56 are fitted into the first groove 53 and the second groove 54 of the base material 52, so Connected and thermally connected. The fin 51 fitted in the first groove 53 is fitted in the first groove 53 in the entire area of the base portion 56 and the other end portion 55 </ b> B continuous to the base portion 56. A part of the plate portion 55C facing the base portion 56 is in contact with the convex portion 59, that is, one surface 58, and the one end portion 55A is disposed flush with the side wall 54A of the adjacent second groove 54.

  In the fin 51 fitted in the second groove 54, the base 56 and substantially half of the length L <b> 1 of the other end 55 </ b> B continuous to the base 56 are fitted in the second groove 54 and connected to the base material 52. And the other half of the remaining portion protrudes from the second groove 54. The other end 55B of the portion protruding from the second groove 54 is in thermal contact with the one end 55A of the adjacent fin 51. As described above, since the grooves 53 and 54 of the base material 52 are alternately formed at different depths, the adjacent fins 51 have one end 55A and the other end 55B facing each other in multiple layers. The two end portions 55A and the other end portion 55B are in contact with each other at the intermediate portion 55 and are thermally connected.

  A plurality of ventilation paths T1 through which air flows are formed between adjacent fins 51 that are thermally connected by the intermediate portion 55 due to the rectangular wave shape of the fins 51. The adjacent fins 51 are connected to the base member 52 by fitting the base portion 56 to the grooves 53 and 54 when the length L1 of the one end portion 55A or the other end portion 55B is set to one pitch. It is arranged at a position shifted by half a pitch. Thereby, each ventilation path T1 has a step between the ventilation path having a rectangular cross section formed by one fin 51A of the adjacent fin 51 and the ventilation path having a rectangular section formed by the other fin 51B. Are provided and connected. That is, the ventilation path T1 is a space surrounded by the one surface 51C of the one fin 51A and the other surface 51D of the other fin 51B between the intermediate portions 55. The air sucked into the heat exchange chamber R1 through the heat exchanger 21 by the blower 22 flows into each ventilation path T1, and the fins 51 are cooled by this air.

  According to this configuration, since the bases 56 of the fins 51 are fitted into the first grooves 53 and the second grooves 54 formed by alternately changing the depth, and the fins 51 are connected to the base material 52, the adjacent The fins 51 to be connected can be thermally coupled across multiple layers at the intermediate portion 55 of the fins 51. As a result, the heat transferred from the substrate 42 to the fins 51 via the base material 52 can be transferred between the adjacent fins 51 via the intermediate portion 55, so that it can be mounted on the substrate 42 with a simple structure. In addition, the heat generated by the electronic components can be radiated and dispersed efficiently over the entire heat sink 50.

  As described above, according to the embodiment to which the present invention is applied, the substrate 52 and the plurality of fins 51 connected to the substrate 52 are provided, and the adjacent fins 51 among the plurality of fins 51 are at least. Since the intermediate portion 55 is thermally connected, the heat transferred from the substrate 42 to the fins 51 via the base material 52 can be transferred between the adjacent fins 51 via the intermediate portion 55, The heat generated by the electronic components mounted on the substrate 42 can be radiated and distributed throughout the heat sink 50 with a simple structure. As a result, the heat of an electronic component having a large amount of heat generation such as a hybrid IC locally disposed on the mounting surface of the substrate 42 can be dispersed and dissipated throughout the heat sink 50. Accordingly, it is possible to prevent the heat sink 50 from being partially in a thermal saturation state and to reduce the heat radiation efficiency, and the heat of the substrate 42 can be efficiently radiated from the entire heat sink 50. In particular, when the size of an electronic component that is mounted on the substrate 42 and radiates heat in contact with the heat sink 50 is smaller than the heat sink 50, heat can be uniformly transmitted to the entire heat sink 50 to dissipate the heat. The action becomes more effective.

  Further, according to the embodiment to which the present invention is applied, since adjacent fins 51 are thermally connected across multiple layers including the intermediate portion 55, the heat sink 50 is adjacent to the adjacent fins 51 in a multilayer floor. Since heat can be transmitted over the entire heat sink, and the heat can be radiated and dissipated through the entire heat sink 50, the heat of the substrate 42 can be efficiently dissipated with a simple structure.

  Further, according to the embodiment to which the present invention is applied, since the fin 51 has a wave shape and the base portion 56 of the fin 51 is fitted in the grooves 53 and 54 of the base material 52, the structure is simple and easy. Thus, it is possible to provide a heat sink 50 that is lightweight, has a large heat radiation area, and has high heat radiation efficiency.

  Further, according to the embodiment to which the present invention is applied, the plurality of fins 51 are formed in the same shape, and the grooves 53 and 54 formed by changing the depth are alternately arranged in the base material 52. Therefore, the parts can be shared, and the base portion 56 is fitted in the grooves 53 and 54 in the same direction with the plurality of fins 51 having the same shape, so that the one end portion 55A facing the adjacent fins 51 and the other Since the end portion 55B can be thermally connected to the intermediate portion 55 across multiple layers, the heat generated by the electronic components mounted on the substrate 42 can be radiated across the entire heat sink 50 with a simple structure. It is possible to dissipate heat efficiently.

Second Embodiment
In the above-described first embodiment, the heat sink 50 has been described with respect to the configuration in which the plurality of fins 51 formed in a rectangular wave shape are connected to the base material 52. In the second embodiment, a configuration of a heat sink 150 in which a plurality of fins 151 formed in a staircase shape are connected to a base material 152 will be described. The configuration of the outdoor unit 10 is the same as that of the above-described first embodiment described with reference to FIGS. 1 and 2, the description thereof is omitted, and the same configuration as the first embodiment of the heat sink 150 is the same. The description is omitted.

FIG. 6 is a diagram showing a heat sink 150 according to the second embodiment to which the present invention is applied. As shown in FIG. 6, the heat sink 150 includes a base material 152 and a plurality of fins 151 connected to the base material 152.
As shown in FIG. 7, the fins 151 are formed in a staircase shape having multiple layers. The fins 151 are formed by bending a single plate made of a high thermal conductivity material such as aluminum by alternately repeating mountain folds and valley folds. Each bent portion (intermediate portion) 155 of the fin 151 is formed in a staircase shape with a substantially right angle. A base portion 156 having a predetermined width W6 is provided at the lower end portion of the fin 151.

  In the fin 151, the straight surface portions 157 provided substantially perpendicular to the base portion 156 and the parallel surface portions 158 provided substantially parallel to the base portion 156 are formed to have the same length L2. The width W6 of the base portion 256 is formed to be shorter than the length L2 of the straight surface portions 157 and the parallel surface portion 158.

  The base material 152 is formed of a high thermal conductivity material such as aluminum, and a plurality of grooves 153 are provided side by side on one surface 160 as shown in FIG. The groove 153 has a width W substantially the same as the width W6 of the base portion 156 of the fin 151. A convex portion 159 is formed between adjacent grooves 153. The width W7 of the convex portion 159 is formed such that the sum of the width W7 of the groove 153 and the length L2 of the parallel surface portion 158 of the fin 151 is substantially the same. Further, the depth D3 of the convex portion 159 is formed to be shorter than the length L2 of each straight surface portion 157 of the fin 151. The bases 156 of the fins 151 are fitted into the grooves 153 of the base material 152, and the plurality of fins 151 are connected to the base material 152.

The plurality of fins 151 connected to the base material 152 are in contact with the bent portions 155 of the adjacent fins 151 and are thermally connected to each other over multiple layers. Although not shown, the substrate 42 is thermally connected to the other surface 161 of the base material 152.
Between adjacent fins 151, a ventilation path T <b> 2 surrounded by a pair of opposing straight surface portions 157 and a pair of parallel surface portions 158 is formed in multiple layers. The air sucked into the heat exchange chamber R1 through the heat exchanger 21 by the blower 22 flows through each ventilation path T2, and the fins 151 are cooled by this air.

  According to these configurations, the fins 151 are formed in a staircase shape, and the bases 156 of the plurality of fins 151 are fitted into the grooves 153 of the base material 152 to connect the plurality of fins 151 to the base material 152 and adjacent to each other. Since the fins 151 to be connected are thermally connected at the bent portion 155, the heat transferred from the substrate 42 to the fin 151 via the base material 152 can be transferred between the adjacent fins 151 via the bent portion 155. In addition, the heat generated by the electronic components mounted on the substrate 42 can be radiated and distributed throughout the heat sink 150 with a simple structure. As a result, the heat of an electronic component having a large amount of heat generation such as a hybrid IC locally disposed on the mounting surface of the substrate 42 can be dispersed and dissipated throughout the heat sink 150. Therefore, it is possible to prevent the heat sink 150 from being partially in a thermal saturation state and to reduce the heat radiation efficiency, and the heat of the substrate 42 can be efficiently radiated from the entire heat sink 150.

Further, since the adjacent fins 151 include the bent portion 155 and are thermally connected over multiple layers, heat can be transferred across the multilayer floor between the adjacent fins 151 of the heat sink 150. Since it is possible to dissipate heat by radiating heat over the entire area, the heat of the substrate 42 can be efficiently dissipated with a simple structure.
In addition, since the fin 151 has a stepped shape and the base 156 of the fin 151 is fitted in the groove 153 of the base material 152, the fin 151 can be easily manufactured with a simple structure, is lightweight, and has a heat dissipation area. A heat sink 150 that is wide and has high heat dissipation efficiency can be provided.

<Third Embodiment>
In the first and second embodiments described above, the plate-like fins 51 and 151 are bent into a rectangular wave shape or a staircase shape, and the adjacent fins 51 and 151 are heated by the intermediate portions 55 and 155. It was the composition to connect. In the third embodiment, a heat sink 250 will be described in which fins 251 are formed in a tube shape having a cylindrical cross section and are arranged on the base material 252 so as to be stacked in multiple layers. The configuration of the outdoor unit 10 is the same as that of the above-described first embodiment described with reference to FIGS. 1 and 2, and the description thereof is omitted. The configuration of the heat sink 250 that is the same as that of the first embodiment is the same. The description is omitted.

  FIG. 8 is a view showing the heat sink 250. As shown in FIG. 8, the heat sink 250 includes a base material 252 and a plurality of tube-shaped fins 251 arranged so as to overlap the base material 252. The base material 252 and the fins 251 are formed from a high thermal conductivity material such as aluminum. The plurality of fins 251 are stacked in multiple layers and connected to the base material 252. Of the fins 251 stacked in multiple layers, the fins 251 directly connected to the base material 252 have a part of the outer periphery circumscribing one surface 258 of the base material 252 and adjacent fins 251 are in the middle. They are arranged on the substrate 252 so as to circumscribe the portion 255. Further, the fin 251 is such that a line connecting the central axes of the fin 251 directly connected to the base 252 and the fin 251 stacked on the fin 251 is substantially perpendicular to the base 252. The intermediate portion 255 is thermally connected and overlapped. Although illustration is omitted, the substrate 42 is thermally connected to the other surface 259 of the base 252.

  The heat sink 250 includes a ventilation path T3 formed on the inner circumferential side of each fin 251 and a ventilation path T4 formed between the outer circumferences of adjacent fins 251. The air sucked into the heat exchange chamber R1 through the heat exchanger 21 by the blower 22 flows through the ventilation paths T3 and T4, and the fins 251 are cooled by the air.

  According to these configurations, since the fins 251 are tube-shaped and are disposed so as to overlap the base material 252, the heat transferred from the substrate 42 to the fins 251 via the base material 252 is transmitted via the intermediate portion 255. Heat can be transferred between the adjacent fins 251, and heat generated by the electronic components mounted on the substrate 42 can be radiated to the entire heat sink 250 with a simple structure. As a result, the heat of an electronic component having a large amount of heat generated such as a hybrid IC locally disposed on the mounting surface of the substrate 42 can be dispersed and dissipated throughout the heat sink 250. Therefore, it is possible to prevent the heat sink 250 from being partially in a thermal saturation state and to reduce the heat dissipation efficiency, and the heat of the substrate 42 can be efficiently dissipated from the entire heat sink 250.

In addition, since adjacent fins 251 include intermediate portion 255 and can transfer heat between the fins 251 over multiple layers, heat can be dissipated and dissipated across the entire heat sink 250, and the structure is simple. Thus, the heat of the substrate 42 can be efficiently radiated.
In addition, since the fin 251 has a tube shape and the fin 251 is disposed so as to overlap the base material 252, it can be easily manufactured with a simple structure, is lightweight, has a large heat radiation area, and has a heat radiation efficiency. A good heat sink 250 can be provided.

<Fourth embodiment>
In the third embodiment described above, the fins 251 have a tubular shape with a cylindrical cross section. In the fourth embodiment, a configuration in which the fins 351 have a tube shape with a rectangular cross section will be described. The configuration of the outdoor unit 10 is the same as that of the first embodiment described with reference to FIGS. 1 and 2, and the description thereof is omitted.

FIG. 9 is a view showing a heat sink 350 of the fourth embodiment. The heat sink 350 includes a base material 352 and a plurality of tubular fins 351 having a rectangular cross section connected to the base material 352. The base material 352 and the fins 351 are formed from a high thermal conductivity material such as aluminum.
A plurality of fins 351 are connected to one surface 358 of the base material 352 so as to overlap each other. The plurality of fins 351 are alternately arranged in a so-called zigzag pattern, and a gap G having a width W9 is provided between adjacent fins 351. A ventilation path T6 is formed between the adjacent fins 351 by the gap G. The width W9 of the ventilation path T6 is formed to be shorter than the length L3 of one side of the fin 351, and can be, for example, substantially half of the length L3 of one side of the fin 351.

Adjacent fins 351 in the stacked state are thermally connected by an overlapping portion (intermediate portion) 355. The ventilation path T6 is surrounded by the outer peripheral surface of the four adjacent fins 351, or the outer peripheral surface of the three adjacent fins 351 and one surface 358 of the base material 352, and is formed in a duct shape. Further, a ventilation path T <b> 5 is formed on the inner peripheral surface side of the fin 351. The air sucked into the heat exchange chamber R1 through the heat exchanger 21 by the blower 22 flows through the ventilation paths T5 and T6, and the fins 351 are cooled by the air.
Although not shown, the substrate 42 is thermally connected to the other surface 359 of the heat sink 350.

According to these configurations, the plurality of tube-shaped fins 351 having a rectangular cross section are alternately arranged in a so-called zigzag pattern and connected to the base material 352 in multiple layers, so that the heat exchange area of the heat sink 350 is widened. The air can be sucked into the heat exchange chamber R1 through the heat exchanger 21 into the ventilation path T6 formed between the adjacent fins 351 and the ventilation path T5 formed on the inner peripheral side of each fin 351. Therefore, the plurality of fins 351 can be efficiently cooled.
Further, since the adjacent fins 351 can be thermally connected by the overlapping portion 355, the heat can be radiated and dissipated through the entire heat sink 350, and the heat of the substrate 42 can be efficiently transmitted with a simple structure. It can dissipate heat well.

<Fifth Embodiment>
In the heat sinks 250 and 350 of the third embodiment or the fourth embodiment described above, fins 251 and 351 formed in a tube shape are arranged in multiple layers on the base materials 252 and 352, and a wide heat exchange area is provided. While ensuring, it was the structure which improves the thermal radiation efficiency by thermally connecting fins 251,351. In the fifth embodiment, a heat sink 450 in which fins 451 formed in a spiral shape are disposed so as to overlap a base material 452 will be described. The configuration of the outdoor unit 10 is the same as that of the first embodiment described with reference to FIGS. 1 and 2, and the description thereof is omitted.

FIG. 10 is a view showing a heat sink 450 of the fifth embodiment to which the present invention is applied. The heat sink 450 includes a base material 452 and fins 451 arranged to overlap the base material 452. The base material 452 and the fins 451 are formed from a high thermal conductivity material such as aluminum.
The fins 451 are formed by bending a single plate material into a rectangular spiral shape with a rectangular cross section. The fins 451 are arranged so as to overlap the base material 452 with one of the four outer faces 453 abutting against one surface 458 of the base material 452. On one surface 458 of the substrate 452, a plurality of fins 451 are placed side by side in a state where adjacent side surfaces (intermediate portions) 455 of adjacent fins 451 are in contact with each other and thermally connected.

Inside each fin 451, an air passage T7 through which air sucked into the heat exchange chamber R1 through the heat exchanger 21 is formed by the blower 22 between the plate materials bent in a spiral shape. The fin 451 is cooled by the air flowing through the ventilation path T7.
Although not shown, the substrate 42 is thermally connected to the other surface 459 of the heat sink 450.

  According to these configurations, the fins 451 are formed in a rectangular spiral shape with a rectangular cross section, and the side surfaces 455 of the adjacent fins 451 are brought into contact with each other and thermally connected to each other to form the base material. Since the heat radiation area of each fin 451 can be increased since the fins 451 are overlapped with each other, the fins 451 can be cooled by the air flowing through the ventilation path T7 formed inside the fins 451. The heat radiation efficiency can be improved. Further, since heat can be transferred through the side surface 455 that abuts between the adjacent fins 451, heat can be dissipated and radiated through the entire heat sink 450, and the heat of the substrate 42 can be efficiently transmitted with a simple structure. It can dissipate heat well.

  Note that the heat sink 450 of the fifth embodiment includes the fins 451 formed by bending a single plate material into a rectangular spiral shape with a rectangular cross section, but the heat sink is not limited to this, and the heat sink shown in FIG. As shown by 550, a spiral fin 551 having a circular cross section is arranged on the base material 552, and the heat is passed through the heat exchanger 21 by the blower 22 flowing through the ventilation path T8 formed inside the fin 551. The structure which cools the fin 551 with the air suck | inhaled in the exchange chamber R1 may be sufficient.

  As described above, according to the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment to which the present invention is applied, the heat exchange in which the heat exchanger 21 is accommodated. The interior of the unit case 11 is divided into a chamber R1 and a machine room R2 that accommodates the compressor 31. The electrical unit 40 is disposed in the machine room R2, and the heat sink 50 of the substrate 42 disposed in the electrical unit 40. In the air conditioner in which (150, 250, 350, 450, 550) is exposed to the heat exchange chamber R1, the heat sink 50 (150, 250, 350, 450, 550) is the base 52 (152, 252, 352, 452). , 552) and a plurality of fins 51 (151, 251, 351, 451, 551) connected to the base material 52 (152, 252, 352, 452, 552). Adjacent fins 51 (151, 251, 351, 451, 551) of at least intermediate portions 55 (155, 255, 355, 455, 555) Connected.

  According to this configuration, the heat transferred from the substrate 42 to the fins 51 (151, 251, 351, 451, 551) via the base material 52 (152, 252, 352, 452, 552) 155, 255, 355, 455, 555), heat can be transferred between adjacent fins 51 (151, 251, 351, 451, 551), and heat is radiated with a simple structure to improve efficiency. It is possible to dissipate heat from the entire heat sink 50 (150, 250, 350, 450, 550). Moreover, each fin 51 (151,251,351,451,551) can be cooled with the air sucked into the heat exchange chamber R1 through the heat exchanger 21 by the blower 22, and the heat sink 50 (150, 250, 350, 450, 550) can be improved.

  In the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment to which the present invention is applied, the intermediate portion of the fin is a component member that constitutes each fin. It is a part and defines a part that abuts adjacent fins and is thermally connected to each other.

R1 Heat exchange room R2 Machine room 11 Unit case (frame)
21 Heat exchanger 22 Blower 31 Compressor 40 Electrical unit (battery box)
50, 150, 250, 350, 450, 550 Heat sink 51, 151, 251, 351, 451, 551 Fin 52, 152, 252, 352, 452, 552 Base material 53 First groove (groove)
54 Second groove (groove)
55, 155, 255, 355, 455, 555 Intermediate portion 56 Base portion 153 Groove

Claims (8)

  A heat sink comprising: a base material; and a plurality of fins connected to the base material, wherein adjacent fins among the plurality of fins are thermally connected at least at an intermediate portion.   The heat sink according to claim 1, wherein the adjacent fins are thermally connected to each other including an intermediate portion over multiple layers.   The heat sink according to claim 1 or 2, wherein the fin has a wave shape, and a base portion of the fin is fitted in a groove of the base material.   The heat sink according to claim 3, wherein the fins have the same shape, and the grooves of the base material are alternately formed with different depths.   The heat sink according to claim 1, wherein the fin has a stepped shape, and a base portion of the fin is fitted in a groove of the base material.   The heat sink according to claim 1, wherein the fin has a tubular shape and is disposed so as to overlap the base material.   The heat sink according to claim 1, wherein the fin has a spiral shape and is disposed so as to overlap the base material. The inside of the housing is divided into a heat exchange chamber containing a heat exchanger and a machine room containing a compressor, an electrical box is placed in the machine room, and a substrate placed in the electrical box In an air conditioner in which a heat sink is exposed to the heat exchange chamber,
The air conditioner, wherein the heat sink includes a base material and a plurality of fins connected to the base material, and adjacent fins among the plurality of fins are thermally connected at least at an intermediate portion. apparatus.

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