JP2000022364A - Heat dissipation fin for electric circuit element, outdoor unit and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high performance heat dissipation fin accelerating heat dissipation of an electric circuit element and an outdoor unit and an air conditioner applied with the heat dissipation fin. SOLUTION: The heat dissipation fin F comprises a basic plate 1 adhering to the surface of a power transistor (electric circuit element) P, and a plurality of main heat plates 2 standing thereon. The main heating plate 2 is provided with a plurality of through holes 2a which enhance ventilation of the heat dissipation fin F thus enhancing heat dissipation performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiating fin for dissipating heat generated from an electric circuit element, and more particularly to an radiating fin applied to an air conditioner for providing a comfortable indoor environment by heating or cooling. Things.

[0002]

2. Description of the Related Art An air conditioner is composed of two major components, an indoor unit and an outdoor unit. Each of these is provided with an indoor heat exchanger and an outdoor heat exchanger that perform heat exchange between the refrigerant and the indoor air and between the refrigerant and the outdoor air.

[0003] These indoor heat exchangers and outdoor heat exchangers are:
In addition, components such as a compressor and an expansion valve are added to constitute a refrigerant circuit. Refrigerant physically circulates through this circuit, and follows the circulating process of changing the state of high-temperature and high-pressure gas, low-temperature and low-pressure gas, high-temperature and high-pressure liquid, and low-temperature and low-pressure liquid. . The cooling and heating of the room is directly realized by heat exchange between the refrigerant in the indoor heat exchanger and room air.

[0004] Heating is realized by sending a gaseous refrigerant converted into a high-temperature and high-pressure gas by a compressor to an indoor heat exchanger and exchanging heat between the refrigerant and indoor air. Cooling also sends high-temperature and high-pressure gaseous refrigerant to an outdoor heat exchanger and exchanges heat with outdoor air to form a high-temperature and high-pressure liquid refrigerant.
This is further realized by passing it through an expansion valve to lower the temperature and pressure and sending it to the indoor heat exchanger, and performing heat exchange between the refrigerant and room air.

[0005]

The outdoor unit is provided with a control box for controlling the operation of the outdoor unit. The control box is composed of various electric circuit elements, and one of the main functions of the control box is a power transistor.

This power transistor generates a large amount of heat during operation. Leaving this heat not only causes the power transistor itself to malfunction, but also adversely affects the surrounding electric circuit elements. Therefore, means for dissipating heat is required. Power transistors include
Radiation fins are provided to dissipate this heat. As shown in FIG. 3, the radiating fins have a configuration including a base plate 1 that is in close contact with the lower surface of the power transistor P, and a plurality of radiating plates 2 erected on the base plate 1. The radiating fins absorb the heat generated from the power transistors and are cooled by the air passing between the radiating plates 2. Thus, heat dissipation of the power transistor P is performed.

However, since the amount of heat accumulated around the power transistor P reaches a considerable amount, it cannot be said that the form such as the above-mentioned radiating fin is sufficient, and there is a demand for further improvement of the heat radiating property. In particular, when the external temperature is relatively high, such as in the summer, the above-mentioned heat problem is more clearly recognized. Even in such a situation, if sufficient heat radiation is not promoted, the operation of the power transistor P, the outdoor unit, and the air It is conceivable that this may affect the operation of the harmonic machine.

In order to avoid the above situation,
In order to improve the performance of the radiating fins F, it is generally conceivable to increase the number of the radiating plates 2. However, in this case, there is a problem that the size of the radiation fins F becomes large, and the degree of freedom regarding the arrangement of each device and apparatus inside the control box is lost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a high-performance, small-sized radiating fin that further promotes heat radiation of a power transistor. Further, the present invention provides an outdoor unit and an air conditioner to which the heat radiation fins are applied.

[0010]

The present invention employs the following means in order to solve the above-mentioned problems. That is, the radiating fin for an electric circuit element according to claim 1 includes a base plate attached to the electric circuit element, and a plurality of radiating plates erected on the base plate, and the radiating plate includes a plurality of radiating fins. Are formed.

[0011] According to this, the ventilation provided in the heat radiation fins is improved by the holes provided in the heat radiation plate. That is, an improvement in heat dissipation is achieved.

An outdoor unit according to a second aspect of the present invention is an outdoor unit including an outdoor heat exchanger and a compressor for sending a high-temperature and high-pressure gas refrigerant to the outdoor heat exchanger or the indoor heat exchanger. The outdoor unit includes a control unit including various electric circuit elements, and at least one of the electric circuit elements includes a base plate attached to the electric circuit element and a base plate mounted on the base plate. A radiating fin for an electric circuit element is provided, the radiating fin being constituted by a plurality of standing heat sinks each having a plurality of holes formed therein.

According to this, since the electric circuit elements constituting the control section provided in the outdoor unit are provided with the above-described radiating fins for the electric circuit elements, the heat generated from the electric circuit elements can be efficiently dissipated. As a result, the outdoor unit can be stably operated.

The air conditioner according to a third aspect of the present invention comprises an outdoor heat exchanger, a compressor for sending a high-temperature and high-pressure gas refrigerant to the outdoor heat exchanger or the indoor heat exchanger, and various electric circuit elements. A control unit, a base plate attached to at least one of the electric circuit elements and attached to the electric circuit element, and a heat sink having a plurality of holes erected on the base plate and formed with a plurality of holes respectively. An outdoor unit provided with electric circuit element radiating fins, a fan for sucking indoor air from an inlet and blowing out from an outlet, and a refrigerant supplied from the indoor air and the outdoor unit And an indoor unit having an indoor heat exchanger that performs heat exchange between the indoor unit and the indoor unit.

This air conditioner can be said to be provided with the outdoor unit according to the second aspect. That is, the present air conditioner is an air conditioner having an effect that stable operation of the outdoor unit is guaranteed by efficiently dissipating heat generated from the electric circuit element in the control unit to the outside. I can say.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of the air conditioner. The air conditioner includes an indoor unit 10 and an outdoor unit 20. The indoor unit 10 and the outdoor unit 20 are connected by a refrigerant pipe 30 through which the refrigerant flows, an electric wiring (not shown), and the like. Two refrigerant pipes 30 are provided, and the refrigerant flows from the indoor unit 10 to the outdoor unit 20 on one side and flows from the outdoor unit 20 to the indoor unit 10 on the other side.

The indoor unit 10 has a base 11 and a front panel 12 integrally formed. The base 11 is provided with various devices such as a plate fin tube type indoor heat exchanger and a substantially cylindrical cross flow fan (fan). These are not both shown. The base 11 has another indoor unit 10
And a control unit 11a configured of various electric circuit elements for performing operation control and the like relating to the operation. The control unit 11a is provided with an appropriate indicator 11b for displaying an operation status and an error mode. The indicator 11b can be checked from the outside by a see-through portion 12a provided on the front panel 12.
An installation plate 13 is provided behind the base 11, so that the indoor unit 10 can be installed on an indoor wall or the like.

The front panel 12 has a suction grill (suction port) 12b formed on each of the front and top surfaces. The indoor air is drawn into the indoor unit 10 from these directions by the suction grills 12b. Incidentally, an air filter 12c is provided behind the suction grill 12b, and functions to remove dust such as sucked air. Also, on the front panel 12,
An air outlet 12d is formed below the air outlet, from which warmed or cooled air is blown out. In addition, this air suction and air blowing
This is performed by rotating the cross flow fan.

The outdoor unit 20 includes an outdoor heat exchanger 20b, a propeller fan 20c, a compressor 20
f, a control box (control unit) 20g, and the like. The outdoor heat exchanger 20b is configured by a refrigerant pipe having a large number of corrugated fins around it, and realizes heat exchange between the refrigerant and outdoor air. The propeller fan 20c is provided in order to improve the heat exchange efficiency by generating wind flowing from the back to the front in the housing 20a to always take in new air into the housing 20a.

A finger 20d and a fan guard 20e are provided on the surface of the housing 20a where the outdoor heat exchanger 20b and the propeller fan 20c face the outside. The fingerings 20d are provided so that the corrugated fins are not damaged by an unexpected impact from the outside. Similarly, the fan guard 20e is provided for the purpose of protecting the propeller fan 20c from external impact similarly and for the purpose of preventing dust and the like contained in the outside air from being taken into the housing 20a. Things.

The compressor 20f supplies a low-temperature low-pressure gas refrigerant to the compressor 20f.
The refrigerant is converted into high-temperature and high-pressure gas refrigerant and discharged, and plays the most central role in the components constituting the refrigerant circuit. Incidentally, the refrigerant circuit is the compressor 20f
In addition to the above, the indoor heat exchanger and the outdoor heat exchanger 20
b, a refrigerant pipe 30, an expansion valve, and a four-way valve (the expansion valve and the four-way valve are not shown) for regulating the flow direction of the refrigerant.
This is a circuit that circulates between zero and zero.

The control box 20g controls the operation of the propeller fan 20c, the compressor 20f, and other various devices provided in the outdoor unit 20, and is made up of various electric circuit elements.

The outdoor unit 20 includes, in addition to the above, a housing 2
A pedestal 20h is provided in order to support Oa and avoid the influence of external vibration and the like. The compressor 2
The wall of the casing 20a close to 0f is a panel 20i that can be removed for maintenance of the compressor 20f and the like.
It is provided with.

Hereinafter, the operation of the air conditioner having such a configuration will be described for each of the heating operation and the cooling operation. First, during the heating operation, the refrigerant converted into a high-temperature and high-pressure gas by the compressor 20f is supplied to the refrigerant pipe 3
0, and is sent to an unillustrated indoor heat exchanger in the indoor unit 10. In the indoor unit 10, heat is given to the room air taken in from the suction grill 12b by the cross flow fan from the high-temperature and high-pressure gas refrigerant passing through the indoor heat exchanger. This allows the front panel 1
Warm air is blown out from the outlet 12d below 2. At the same time, the high-temperature and high-pressure gas refrigerant is condensed and liquefied in the indoor heat exchanger and becomes a high-temperature and high-pressure liquid refrigerant.

The high-temperature and high-pressure liquid refrigerant is supplied to the refrigerant pipe 3 again.
0 through the outdoor heat exchanger 20 in the outdoor unit 20
b. In the outdoor unit 20, the high-temperature and high-pressure liquid refrigerant passing through the outdoor heat exchanger 20b takes heat from fresh outdoor air taken into the housing 20a by the propeller fan 20c. As a result, the high-temperature and high-pressure liquid refrigerant evaporates and becomes a low-temperature and low-pressure gas refrigerant. This is sent to the compressor 20f again, and the above process is repeated.

During the cooling operation, the refrigerant flows through the refrigerant circuit in a direction opposite to the above. That is, the refrigerant converted into a high-temperature and high-pressure gas by the compressor 20f passes through the refrigerant pipe 30 and is sent to the outdoor heat exchanger 20b, where the outdoor air is given heat and condensed and liquefied to become a high-temperature and high-pressure liquid refrigerant. This high temperature and high pressure liquid refrigerant
After passing through an expansion valve (not shown), it becomes a low-temperature and low-pressure liquid refrigerant,
It is sent to the indoor heat exchanger (not shown) again through the refrigerant pipe 30. Here, the low-temperature and low-pressure liquid refrigerant takes heat from the room air to cool the room air, and the refrigerant itself evaporates and becomes a low-temperature and low-pressure gas refrigerant. This is again the compressor 20
f and the above process is repeated.

These operations are controlled by the control unit 11a housed in the indoor unit 10 and the control box 20g housed in the outdoor unit 20 working together.

Hereinafter, the characteristic portions of the present invention will be described. The control box 20g housed in the outdoor unit 20 is composed of each electric circuit element as described above, and one of them is a power transistor (electric circuit element). As shown in FIG. 2, the power transistor P has a radiation fin F for an electric circuit element (hereinafter, abbreviated as a radiation fin) so as to be in close contact with its lower surface.
Is attached. The radiation fins F are provided for absorbing heat generated from the power transistor P and dissipating the heat to the outside.

As shown in FIG. 2, the radiating fins F have a configuration in which a base plate 1 closely attached to the lower surface of the power transistor P and a plurality of radiating plates 2 erected on the base plate 1 are provided. I have. A plurality of holes 2a are formed in the heat sink 2 so as to penetrate the plate surface. The hole 2a in the present embodiment is formed in a checkered pattern on the entire surface of the heat sink 2, as shown in FIG. Incidentally, the radiation fins F are made of aluminum which has a large thermal diffusivity and is lightweight.

The power transistor P provided with the heat radiating fin F is disposed in the control box 20g.
The control box 20g is housed in the housing 20a of the outdoor unit 20, as shown in FIG. FIG.
, An air hole 20j is formed above the panel 20i. From the wind hole 20j, the propeller fan 20c
Is rotated, the control box 20g
The wind passes through the vicinity, and passes through the space between the heat radiating plates 2, thereby promoting the heat dissipation of the power transistor P.

At this time, the holes 2 formed in the surface of the heat sink 2
Since a has the function of improving the ventilation of the radiation fins F, the radiation performance of the radiation fins F is to be improved. Therefore, the power transistor P
Can quickly dissipate heat and always perform a stable operation. This means that the outdoor unit 2 having the control box 20g provided with the power transistor P
It is apparent that this contributes to stable operation of the air conditioner and thus to stable operation of the air conditioner.

The improvement in the heat radiation performance as described above means that the heat radiation fin F in the present embodiment and the conventional heat radiation fin are compared with each other from the viewpoint of exhibiting a certain performance. It can be seen that the fin F can be reduced in size. In other words, the radiation fins F in the present embodiment can secure radiation performance comparable to that of the conventional radiation fins even when the size is reduced.

In the above, the radiation fin F is
Although the example applied to the outdoor unit and the air conditioner has been described, the radiation fin F itself can be applied to an electric circuit element provided in another device. For example, it is possible to apply the heat radiation fin F of the present invention to a power transistor used in other home electric appliances such as a television and a video deck.

The indoor unit 10 and the outdoor unit 20
Is not particularly limited to the above embodiment. That is, the present invention is applicable to any type of air conditioner provided with an indoor unit, an outdoor unit, and a control box mounted on the outdoor unit.

[0035]

As described above, in the radiating fin for an electric circuit element according to the first aspect, since a plurality of holes are formed in the radiating plate, the ventilation of the radiating fin is improved. That is, an improvement in the heat radiation of the electric circuit element is achieved. Therefore, a stable operation of the electric circuit element to which the heat radiation fins are attached is guaranteed. Further, the improvement of the heat radiation performance of the heat radiation fin means that the heat radiation fin can be downsized at the same time, and the degree of freedom regarding the arrangement of each device and device in the control unit can be increased.

In the outdoor unit according to the second aspect, since the heat radiation fins are provided in the electric circuit element in the control unit provided in the interior, the heat generated from the electric circuit element can be efficiently discharged to the outside. Therefore, stable operation of the electric circuit element, that is, stable operation control of the outdoor unit can be realized. To put it more simply, the outdoor unit can be operated stably.

In addition, since the air conditioner according to the third aspect can be said to be provided with the outdoor unit, the above-mentioned effect can be enjoyed as it is. That is, the stable operation of the outdoor unit is ensured, and as a result, the stable operation of the air conditioner can be realized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a configuration of an air conditioner.

FIG. 2 is a perspective view showing a configuration of a radiation fin.

FIG. 3 is a perspective view showing a configuration of a conventional heat radiation fin.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base plate 2 radiator plate 2a hole 10 indoor unit 12b suction grille (suction port) 12d outlet 20 outdoor unit 20b outdoor heat exchanger 20f compressor 20g control box (control unit) P power transistor (electric circuit element) F radiating fin

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kunihiro Kobayashi 3-1-1 Asahimachi, Nishibiwajima-cho, Nishi-Kasugai-gun, Aichi Prefecture Inside Air Conditioning Works of Mitsubishi Heavy Industries, Ltd. 3-chome, 1-chome Mitsubishi Heavy Industries, Ltd. Air Conditioner Works F-term (reference) 5E322 AA01 AA11 AB11 BA05 BB03 BB10 BC02 BC05 DB01 FA01

Claims (3)

[Claims] An electric circuit device comprises: a base plate attached to an electric circuit element; and a plurality of radiating plates erected on the base plate, wherein the radiating plate has a plurality of holes. Characteristic radiation fins for electric circuit elements. 2. An outdoor unit comprising: an outdoor heat exchanger; and a compressor for sending a high-temperature and high-pressure gaseous refrigerant to the outdoor heat exchanger or the indoor heat exchanger. A control unit including a circuit element is provided, and at least one of the electric circuit elements includes a base plate attached to the electric circuit element, and a plurality of standing plates provided on the base plate, each of which includes a plurality of base plates. An outdoor unit provided with a radiating fin for an electric circuit element, which is constituted by a radiating plate having a hole formed therein. 3. An outdoor heat exchanger, a compressor for sending a high-temperature and high-pressure gaseous refrigerant to the outdoor heat exchanger or the indoor heat exchanger, a control unit including various electric circuit elements, and the electric circuit element A base plate attached to at least one of the base plates and attached to the electric circuit element, and a radiator plate formed on the base plate and provided with a plurality of holes, each of which has a plurality of holes. An outdoor unit provided with a radiating fin, a fan for sucking room air from an inlet and blowing out from an outlet, and a room for exchanging heat between the room air and a refrigerant supplied from the outdoor unit. An air conditioner comprising: an indoor unit having a heat exchanger.