JPH04338074A - Elevator control panel - Google Patents

Abstract

PURPOSE:To improve the cooling efficiency of each electrical component by mounting a heat radiation-required electrical component to a radiating fin, then providing a cooling fan larger than the cross-sectional area of the radiating fin in a position of enabling the cooling of the whole radiating fin and the electrical component, and discharging cooling air from a cooling air inflow port through two air passages. CONSTITUTION:A heat radiation-required electrical component 3 among electrical parts enclosed in a case 1 is mounted to a radiating fin 2, and a cooling fan 4 larger than the cross-sectional area of the radiating part 2a of the fin 2 is provided in a position of enabling the cooling of the whole radiating part 2a and the mounted electrical component 3. Air flow A for cooling the whole radiating part 2a passes a first cooling air passage 11 from an air inflow port 5 and is discharged from an outflow port 6, and air flow B for cooling the mounted electrical component 3 passes a second cooling air passage 12 and is discharged from the outflow port 6. Accordingly, even if clearances among the cooling-required electrical component and heat generating parts around are narrow, the cooling can be performed efficiently so as to prevent failure caused by heat.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control panel, and particularly to an elevator control panel with good cooling efficiency.

0002

2. Description of the Related Art As a conventional elevator control panel of this type, there is a technique disclosed in Japanese Patent Application Laid-Open No. 62-265798.

FIG. 4 is a front view showing a conventional elevator control panel, FIG. 5 is a side view showing a conventional elevator control panel, and FIG.
FIG. 5 is a cross-sectional view showing the AA cross section of the elevator control panel in FIG. 4. FIG.

In the figure, 1 is a housing housing various electrical parts for controlling the elevator, 2 is a hollow heat dissipating fin disposed inside the housing 1, and 3 is a heat dissipating fin mounted on the back surface of the heat dissipating fin 2. 4 is a cooling fan that forcibly cools the electrical component 3 that requires heat dissipation, and 5 is formed on the lower surface of the housing 1 to have the same size as the hollow part of the heat dissipation fin 2. A cooling air inlet 6 is a cooling air outlet formed on the upper surface of the casing 1 to have the same size as the hollow portion of the radiation fin 2 . Note that, in the figure, among the electrical components housed in the casing 1, electrical components other than the heat dissipation required electrical component 3 are omitted.

In the conventional elevator control panel having this configuration, among the electrical components housed in the casing 1, the electrical components 3 that require heat dissipation, such as high-power semiconductor elements, tend to concentrate power and generate heat. They are mounted together on the radiation fins 2 and are forcibly air-cooled by the cooling fan 4.

Generally, in the case of forced air cooling using the cooling fan 4, a thermostat or the like is installed on the heat radiation fins 2 in order to prevent thermal destruction of the electrical components 3 that require heat radiation when the cooling fan 4 fails. When this is activated, the elevator car is stopped at the nearest floor, and the operation of the elevator is stopped until the temperature of the radiation fins 2 falls.

[0007]

[Problems to be Solved by the Invention] In the conventional elevator control panel as described above, various electrical parts for controlling the elevator are housed in the housing 1. In particular, in recent years, most elevators are controlled by inverters. As a result, heat-generating elements such as high-power semiconductors have come into widespread use. In addition, the miniaturization of elevator control panels has been promoted due to needs from various fields.

[0008] Therefore, the mounting density of each electrical component of the elevator control panel is increased, and for example, the electrical components 3 that require heat dissipation such as a high power semiconductor element mounted on the heat dissipation fin 2,
In order to suppress overvoltage that occurs when the element switches, the distance between a snubber made of a resistor, a capacitor, etc., and heat-generating components around the snubber is narrowed. Therefore, during elevator operation, the cold air taken in by the cooling fan 4 passes linearly through the hollow part of the radiating fin 2 and cools the radiating fin 2, so that the electrical components 3 on the radiating fin 2 that require heat radiation are cooled. However, the cooling efficiency of the snubber attached to the surface of the electrical component 3 requiring heat dissipation and the heat-generating components around it was reduced, and the temperature rise was significantly high. As a result, the reliability of each component decreased and many failures occurred due to heat. In the worst case scenario, the elevators could stop operating.

[0009] Accordingly, the object of the present invention is to provide an elevator control panel that can increase the cooling efficiency of each electrical component mounted on the heat dissipation fins, suppress the temperature rise, and prevent the occurrence of malfunctions due to heat. It is.

0010

[Means for Solving the Problems] An elevator control panel according to the present invention includes a casing in which various electrical components for controlling the elevator are housed, and a cooling air inlet provided at two different positions in the casing. and a cooling air outlet, a first cooling air passage that guides the air flow from the cooling air inlet to the cooling air outlet, and a second cooling air passage that guides the air flow from the cooling air inlet to the cooling air outlet. A wind air path, a radiation fin on which an electrical component requiring heat radiation among the electrical components is mounted, and a radiation fin provided in a position where the entire heat radiation part of the radiation fin and each electrical component mounted on the radiation fin can be cooled. , a cooling fan having a larger cross-sectional area than the heat dissipation part of the heat dissipation fin, which blows an air flow that cools the entire heat dissipation part of the heat dissipation fin and an air flow that cools each electrical component mounted on the heat dissipation fin. There is.

[0011]

[Function] In the elevator control panel of the present invention, the electrical components that require heat radiation among various electrical components for controlling the elevator housed in the housing are mounted on the radiation fin, and the entire heat radiation part of the radiation fin and the A cooling fan that is larger in cross-sectional area than the heat radiating part of the heat radiating fin and arranged at a position where each electrical component mounted on the heat radiating fin can be cooled cools the entire heat radiating part of the heat radiating fin. The air flow is taken in from the inlet and sent to the cooling air outlet through the first cooling air duct, and the air flow for cooling each electrical component mounted on the radiation fin is taken in from the cooling air inlet and sent to the second cooling air duct. Since the air is blown through the cooling air outlet to the cooling air outlet, each electrical component such as the electrical component requiring heat dissipation can be efficiently cooled by the air flow, and temperature rise can be suppressed.

0012

[Examples] Examples of the present invention will be described below.

FIG. 1 is a plan view showing an elevator control panel according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line B-B of the elevator control panel in FIG. 1, and FIG. 3 is a plan view showing the elevator control panel in FIG. It is a sectional view showing a CC section of. In the drawings, the same reference numerals and symbols as those in the above conventional example indicate constituent parts that are the same as or correspond to those in the above conventional example.

In the figure, 7 is a printed wiring board housed in the housing 1, 8 is a mounting plate for the printed wiring board 7, and 9 is a printed wiring board housed in the housing 1.
is the printed wiring board 7 facing the electrical component 3 that requires heat dissipation.
This mounted component 9 drives a high-power semiconductor element. Reference numeral 10 denotes a removable air filter disposed at the cooling air inlet 5, and this air filter 10 removes dust from the cooling air. Reference numeral 11 indicates that cooling air flows in from the cooling air inlet 5 to the cooling fan 4.
A first cooling air passage 12 guides the cooling air through the hollow part of the heat dissipation fins 2 to the cooling air outlet 6; 13 is a snubber consisting of a resistor, a capacitor, etc. attached to the electrical component 3 that requires heat dissipation; Suppresses overvoltage that occurs when switching elements.

Further, in this embodiment, a cooling fan 4 is disposed between the radiation fins 2 and the cooling air inlet 5, and this cooling fan 4 is connected to the heat radiation portion 2 of the radiation fins 2.
It is larger than the cross-sectional area of a. And the first cooling air passage 11
An air flow A flows inside the cooling air passage 12, and an air flow B flows inside the second cooling air passage 12.

The elevator control panel of this embodiment is constructed as described above, and is arranged at a position where the entire heat dissipating portion 2a of the heat dissipating fin 2 and each electrical component mounted on the heat dissipating fin 2 can be cooled. The cooling fan 4 blows an air flow A that cools the entire heat radiation part 2a of the heat radiation fin 2, and also blows an air flow B that cools each electrical component mounted on the radiation fin 2. That is, the cooling air forcibly taken into the housing 1 by the cooling fan 4 from the cooling air inlet 5 provided at the bottom of the back surface of the housing 1 passes through the cooling fan 4 and then flows through the radiation fins 2. It linearly passes through the hollow first cooling air passage 11 which is the heat dissipation part 2 a and is discharged to the cooling air outlet 6 . In addition, the cooling fan 4 is larger than the cross-sectional area of the heat dissipation part 2a of the heat dissipation fin 2, and the cooling air that has passed through the cooling fan 4 that protrudes from the bottom surface of the heat dissipation fin 2 passes through the heat dissipation area mounted on the heat dissipation fin 2. The cooling air flow passes through the second cooling air passage 12 formed by the snubber 13 attached to the electrical component 3 and the mounting component 9 on the printed wiring board 7 attached substantially parallel to the snubber 13. It is discharged to outlet 6. In this way, the air flow A flowing through the first cooling air passage 11 cools the entire heat radiation part 2a of the radiation fin 2, and the air flow B flowing through the second cooling air passage 12 cools each of the heat radiation parts mounted on the radiation fin 2. Electrical components are cooled. Therefore, the snubber 13 attached to the heat-dissipating electric component 3 that generates heat due to the operation of the elevator and the mounted component 9 on the printed wiring board 7 can be forcibly cooled.

On the other hand, in this embodiment, the cooling air inlet 5
A removable air filter 10 is attached to the cooling air inlet 5 to prevent dust such as concrete powder from entering the housing 1 from the cooling air outlet 6 and having an adverse effect on internal equipment. ing. Therefore, this air filter 10 can prevent the inflow of dust and the like. Moreover, clogging of the air filter 10 can be prevented by removing and cleaning it during regularly performed maintenance work.

As described above, the elevator control panel of this embodiment includes a housing 1 in which various electrical parts for controlling the elevator are housed, and a cooling air inlet provided at two different positions in the housing 1. 5 and a cooling air outlet 6; a first cooling air passage 11 that guides the airflow A from the cooling air inlet 5 to the cooling air outlet 6; A second cooling air passage 12 that guides the airflow B, a heat radiation fin 2 on which an electrical component 3 that requires heat radiation such as a high power semiconductor element among the electrical components is mounted, the entire heat radiation part 2a of the heat radiation fin 2, and The air flow A and the radiation fin 2 are arranged at a position where each electrical component mounted on the radiation fin 2 can be cooled, and cool the entire heat radiation part 2a of the radiation fin 2.
The cooling fan 4 is provided with a cooling fan 4 larger than the cross-sectional area of the heat radiating portion of the heat radiating fins 2, which blows an air flow B to cool each electrical component mounted on the fin.

That is, in the elevator control panel of this embodiment, among the various electrical components for elevator control housed in the casing 1, the electrical components 3 that require heat dissipation, such as high-power semiconductor elements, are mounted on the heat dissipation fins 2. The heat dissipation part 2a of the heat dissipation fin 2
A cooling fan 4 larger in cross-sectional area than the heat radiating part 2a of the heat radiating fin 2, which is disposed in a position where the whole and each electric component mounted on the heat radiating fin 2 can be cooled, An air flow A that cools the entire body is taken in from the cooling air inlet 5 and sent to the cooling air outlet 6 through the first cooling air passage 11, and an air flow that cools each electrical component mounted on the radiation fins 2. B is taken in from the cooling air inlet 5 and blown to the cooling air outlet 6 through the second cooling air passage 12.

Therefore, during elevator operation, the airflow A of cold air taken in by the cooling fan 4 flows through the hollow first cooling air passage 1 which is the heat radiation part 2a of the radiation fin 2.
1 and cools the radiation fins 2, the electrical components 3 that require heat radiation on the radiation fins 2 are cooled, and the air flow B, which is also cold air taken in by the cooling fan 4, cools the heat radiation fins 2. The snubber 13 attached to the surface of the electrical component 3 requiring heat radiation and heat generating components such as the mounted components 9 around the snubber 13 are directly cooled. For this reason,
The mounting density of each electrical component in the elevator control panel has increased,
For example, even if the distance between the electrical components 3 that require heat dissipation such as high-power semiconductor elements mounted on the heat dissipation fins 2, the snubber 13, and the surrounding heat generating components becomes narrow, each electrical component can be efficiently cooled and the temperature increase can be suppressed. Therefore, the reliability of each component is improved, failures due to heat can be prevented from occurring, and as a result, the elevator control panel can be made smaller.

By the way, in the above embodiment, the cooling fan 4
Although it is arranged below the heat radiation fin 2, the arrangement position is not limited to this, and may be provided above the heat radiation fin 2. In addition, the shape of the heat dissipation fin 2 is also a hollow heat dissipation part 2.
The present invention is not limited to those having a, but any material may be used as long as it provides the same effects as those of the above embodiments.

[0022]

As explained above, the elevator control panel of the present invention includes a casing, a cooling air inlet, a cooling air outlet, a first cooling air passage, and a second cooling air passage. , a heat dissipation fin, and a cooling fan, and among various electrical components for elevator control housed in the housing, electrical components that require heat dissipation are mounted on the heat dissipation fin, and the entire heat dissipation part of the heat dissipation fin and the cooling fan are mounted on the heat dissipation fin. A cooling fan that is larger in cross-sectional area than the heat radiating part of the heat radiating fin and arranged at a position where each electrical component mounted on the heat radiating fin can be cooled cools the entire heat radiating part of the heat radiating fin. The air flow is taken in from the inlet and sent to the cooling air outlet through the first cooling air duct, and the air flow for cooling each electrical component mounted on the radiation fin is taken in from the cooling air inlet and sent to the second cooling air duct. With a simple configuration in which air is blown through the cooling air outlet to the cooling air outlet, the airflow can efficiently cool each electrical component, such as electrical components that require heat dissipation, and suppress temperature rises, improving the reliability of each component and reducing heat dissipation. It is possible to prevent the occurrence of failures due to

[Brief explanation of drawings]

FIG. 1 is a plan view showing an elevator control panel according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the BB cross section of the elevator control panel in FIG. 1;

FIG. 3 is a sectional view showing the CC section of the elevator control panel in FIG. 1;

FIG. 4 is a front view of a conventional elevator control panel.

FIG. 5 is a side view showing a conventional elevator control panel.

FIG. 6 is a sectional view showing the AA cross section of the elevator control panel of FIG. 4;

[Explanation of symbols]

1 Housing 2 Heat radiation fins 2a Heat dissipation part 3 Electrical parts requiring heat dissipation 4 Cooling fan 5 Cooling air inlet 6 Cooling air outlet 7 Printed wiring board 8 Mounting plate 9 Installed parts 10 Air filter 11 First cooling air duct 12 Second cooling air duct 13 Snubber

Claims (1)

[Claims] 1. A casing in which various electrical parts for controlling an elevator are housed, a cooling air inlet and a cooling air outlet disposed at two different positions of the casing, and a cooling air inlet and a cooling air outlet provided from the cooling air inlet. A first cooling air duct that guides air flow to the cooling air outlet; a second cooling air duct that guides air flow from the cooling air inlet to the cooling air outlet; A radiation fin on which components are mounted, and an air flow that is arranged at a position where it is possible to cool the entire heat radiation part of the radiation fin and each electrical component mounted on the radiation fin, and cools the entire heat radiation part of the radiation fin. and a cooling fan larger than the cross-sectional area of the heat radiation part of the radiation fin, which blows an air flow to cool each electrical component mounted on the radiation fin.