JPH02301192A - Control panel of elevator - Google Patents

Abstract

PURPOSE:To enable inspection and cleaning work of dust adhering to heat radiating fins to be done easily thereby maintaining cooling efficiency favorably so as to prevent fault of electronic part from occurring by providing an inspection window opposed to the fin-shaped heat radiating part of heat radiating fins, and a cover member to cover the inspection window capable for opening and closing. CONSTITUTION:Usually, as a cover member 21 is mounted to the rear of a cage body 11 by screws 22, when a cooling fan 18 is rotated, the fold-shaped heat radiating part 16 of heat radiating fins 15 is cooled, and the heat of electric parts 17 requiring heat radiation, such as a high power semiconductor element, or the like, which has generated heat during operation of an elevator is radiated compulsorily. If dust such as cotton dust, etc., adheres to the fin-shaped heat radiating part 16, the heat radiating efficiency of the electric parts 17 lowers, so cyclic maintenance inspection work becomes necessary for the heat radiating fins 15. At the time of this maintenance inspection work, if the cover member 21 is removed, the fin-shaped heat radiating part 16 is exposed to outside through an inspection window 20, so dust adhering condition can be inspected, and in case that there is much dust, by moving a hand broom, etc., along the fold-shaped heat radiating part 16, the dust can be cleaned and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to an elevator control panel, and more particularly to an elevator control panel equipped with heat dissipation fins for dissipating heat from high-power semiconductor devices and the like.

[Prior art] As a conventional control panel for this type of elevator,
The technique disclosed in Japanese Patent No. -265798 can be mentioned.

FIG. 5 is a front view of a conventional elevator control panel disclosed in the above publication, FIG. 6 is a side view of FIG. 5, and FIG. 7 is a sectional view taken along the line B--B of FIG. 5.

In the figure, (1) is a housing that accommodates various electrical parts for elevator control, (2) is a hollow heat radiation fin provided in the housing (1), and (3) is the heat radiation fin. (2
), (4) is a cooling fan that forcibly cools the electrical component (3) that requires heat dissipation, and (5) is the top surface of the housing (1). One cooling air inlet is formed to have the same size as the hollow part of the heat dissipation fin (2), and (6) is the heat dissipation fin (2) formed on the bottom surface of the housing (1).
) is a cooling air outlet formed to the same size as the hollow part. 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 configured as described above, among the electrical components housed in the casing (1), the electrical components (3) that require heat dissipation, such as high-power semiconductor elements, have concentrated power. Since they easily generate heat, they are mounted together on a heat dissipation fin (2) and are forcibly cooled by a cooling fan (4). However, due to the relationship between the amount of heat generated and the amount of heat dissipation, natural air cooling
If the cooling fan (4) is not sufficient, the cooling fan (4) may be omitted.

Generally, in the case of a forced air cooling system using a cooling fan (4), in order to prevent thermal destruction of the heat dissipating electrical components (3) in the event of a failure of the cooling fan (4), a A thermostat or the like is installed in the elevator, and when this operates, 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) decreases. Please note that the cooling fan (
In the case of a natural air cooling system that does not have 4), there is no need to worry about fan failure, so a thermostat or the like is usually not installed.

[Problem to be solved by the invention] By the way, in home elevators that have become popular in recent years, in order to meet customer demands for space saving, the control panel is sometimes installed within the three-sided frame that forms the entrance on the landing side. . However, in the case of a home elevator where a home elevator is installed, there is more dust such as cotton dust in the environment around the control panel within the three-sided frame than in a general building.
Dust contained in the cooling air adheres to the radiation fins (2),
The cooling effect of electrical components (3) that require heat dissipation, such as high-power semiconductor devices, may deteriorate over time.

In this case, according to the control panel that uses the thermostat to detect an abnormal temperature rise of -L, the electrical component requiring heat radiation (3)
Every time the elevator generates high temperature heat, the elevator operation is stopped, resulting in a decline in service.

Furthermore, with a control panel without a thermostat, there is a risk that the electrical components (3) that require heat dissipation will be destroyed at high temperatures, resulting in loss of control and accidents such as so-called "packing".

Therefore, in the control panel of this type of elevator, regular maintenance and inspection of the radiation fins (2) is important.

Therefore, it may be possible to provide an air filter at the cooling air inlet (5), but this would be expensive (
Not only that, but if the air filter becomes clogged, there is even a possibility that the cooling capacity will be further reduced.

In addition, in the case of a small control panel aimed at saving space, a large number of electrical components are mounted inside the housing (1), and
Since the casing (1) is installed within a three-sided frame, it is very troublesome to inspect the degree of dust adhesion to the heat dissipation fins (2), or to clean it to remove the adhering dust. had to spend a long time. Moreover,
In the conventional elevator control panel as mentioned above,
Since the radiation fins (2) have a hollow configuration, it is extremely difficult to check whether dust has adhered to the radiation fins (2).

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to make it possible to easily inspect and clean dust adhering to heat dissipation fins with a simple and economical configuration, thereby maintaining good cooling efficiency, and providing high-power semiconductor devices with a simple and economical configuration. It is an object of the present invention to provide an elevator control panel that can prevent failures of heat-dissipating electric components such as the above.

[Means for Solving the Problems] In order to solve the above-mentioned problems, an elevator control panel according to the present invention provides cooling air flow in two different positions of a housing that accommodates various electrical components for elevator control. An inlet and a cooling air outlet are provided, and a cooling air passage is formed in a part of the housing to guide the cooling air from the cooling air inlet to the cooling air outlet. A heat dissipation fin having a heat dissipation area and mounted with an electrical component requiring heat dissipation such as a high-power semiconductor element among the electrical components is arranged, and an inspection window is provided in the housing so as to face the pleated heat dissipation part of the heat dissipation fin. The inspection window is provided with a cover member that can be opened and closed.

[Function] The elevator control panel of the present invention is provided with an inspection window that faces the pleated heat dissipation portion of the heat dissipation fin, and a cover member that covers the inspection window so that it can be opened and closed. When the inspection window is opened, the pleated heat dissipation portion of the heat dissipation fin is exposed to the outside of the casing through the inspection window. Therefore, in this state, it is possible to easily check the degree of adhesion of dust to the pleated heat radiating portions of the heat dissipating fins, and it is also possible to easily clean and remove the dust attached to the pleated heat radiating portions. As a result, the cooling efficiency of the radiation fins can be maintained at a good level at all times with simple maintenance and inspection work, thereby preventing failures due to high-temperature heat generation in electrical parts that require heat radiation, such as high-power semiconductor elements. Furthermore, since it is only necessary to provide an inspection window and a cover member, the above-mentioned effects can be obtained with a simple and economical configuration.

[Example] The present invention will be explained in detail below.

FIG. 1 is a partial perspective view showing an elevator control panel according to an embodiment of the present invention as seen from the rear side, FIG. 2 is a front view showing the entire elevator control panel of FIG. 1, and FIG. The right side view of the figure and FIG. 4 are sectional views taken along the line A--A in FIG. 2.

In the figure, (11) is a housing that accommodates various electrical parts for elevator control, (12) is a cooling air inlet formed on the rear upper surface of the housing (11), and (13) is a housing (
11) Cooling air outlet formed on the rear lower surface, (14)
) connects the cooling air from the cooling air inlet (12) to the cooling air outlet (13) at the rear of one side of the housing (11).
) is a cooling air passage leading to

(15) is a heat dissipation fin disposed in the cooling air passage (14), which has a plurality of fold-like heat dissipation parts (16), and has a back surface that includes high-power semiconductor elements among the electrical components. Electric components (17) requiring heat dissipation are mounted.

(18) is a cooling fan (19) disposed between the upper part of the heat radiation fin (15) and the cooling air inlet (12) so as to forcibly cool the electrical component (17) requiring heat radiation;
) is the suction port of the cooling fan (18). Note that the cooling air inlet (12) and the cooling air outlet (13)
are each formed to have approximately the same size as the end face of the radiation fin (15). Further, in the figure, among the electrical components housed in the casing (11), electrical components other than the heat dissipation required electrical component (17) are omitted.

(20) is a pleated heat dissipating portion (1) of the heat dissipating fin (15).
6) and facing it.
The inspection window (21) formed on the back side of 1) is a plate-shaped cover member that covers the inspection window (20) in an openable and closable manner, and is in close contact with the pleated heat dissipation portion (16) of the heat dissipation fin (15). In this state, insert multiple screws (22
) (only one is shown in Figure 1). The cover member (21) constitutes a back surface of the cooling air passage (14) in its closed state. Note that the other surface of the cooling air passage (14) is covered with the radiation fins (15).
).

Next, the operation of the elevator control panel of this embodiment configured as described above will be explained.

Normally, the cover member (21) is attached to the back of the housing (11) with screws (22), and the -
At the rear side, there are heat dissipation fins (1) from the cooling air inlet (12).
The cooling air outlet (
13) is formed. When the cooling fan (18) is rotated in this state, the pleat-shaped heat radiating portion (16) of the heat radiating fin (15) is cooled by the cooling air passing through the cooling air passage (14), and the folded heat radiating portion (16) of the heat radiating fin (15) is cooled. Electrical components that require heat dissipation, such as high-power semiconductor elements that generate heat (17
) is forced to radiate heat.

On the other hand, if dust such as cotton dust adheres to the pleated heat radiating portion (16) of the heat dissipating fin (15) due to long-term use, the heat dissipation efficiency of the heat dissipating electrical component (17) will decrease. ) requires periodic maintenance and inspection work.

During this maintenance inspection work, the cover member (21) is removed and the inspection window (20) is opened. In this way, the pleated heat radiating portion (16) of the heat radiating fin (15) is exposed to the outside through the inspection window (20), so that the pleated heat radiating portion (16) is exposed to the outside through the inspection window (20).
), it is possible to clearly check the degree of dust adhesion.

If there is a lot of dust, the dust can be cleaned and removed with a very simple operation by moving a handbrow or the like along the pleated heat radiating portion (16).

In this way, the elevator control panel of this embodiment has a cooling air inlet (12) and a cooling air outlet (13) at two different positions of the casing (11) that houses various electrical components for elevator control. ), and a part of the housing (11) is provided with a cooling air outlet (12) for directing the cooling air from the cooling air inlet (12).
A cooling air passage (14) leading to the electrical component (13) is formed, and the cooling air passage (14) has a pleated heat dissipation portion (16), and a high-power semiconductor element etc. among the electrical components is formed on the back surface. Heat dissipation fin (15) mounted with electrical components (17) that require heat dissipation
, and the pleated heat dissipation part (1) of the heat dissipation fin (15)
An inspection window (20) is formed in the housing (11) so as to face 6), and a cover member (21) is provided on the inspection window (20) so as to be openable and closable.

Therefore, in the elevator control panel of the above embodiment, if the cover member (21) is removed and the inspection window (20) is opened, the radiation fins (1)
Since the pleated heat dissipating portion (16) of 5) is exposed to the outside of the housing (11), in this state, it is easy to check whether dust has adhered to the pleated heat dissipating portion (16), and the pleated heat dissipating portion (16) is exposed to the outside of the housing (11). Dust attached to the part (16) can be easily cleaned and removed. As a result, the heat dissipation fins (
The cooling efficiency of item 15) can be maintained at a good level at all times, thereby preventing failures due to high temperature heat generation of electrical components (17) that require heat dissipation, such as high-power semiconductor elements. Moreover, the inspection window (20)
Since it is only necessary to provide the cover member (21) and the cover member (21), the above-mentioned effects can be obtained with a simple and economical configuration.

In addition, in the above embodiment, the electrical component (17) requiring heat dissipation was configured to be forcibly cooled by the cooling fan (18).
The present invention is not limited to this, and the cooling fan (18) may be omitted and the electrical component (17) requiring heat dissipation may be naturally cooled by cooling air passing through the cooling air passage (14). good.

However, as in the above embodiment, the cooling fan (18
) is installed, it is possible to obtain the effect that heat dissipation efficiency is good and thermal destruction of the heat dissipation-requiring electric component (17) can be reliably prevented.

Further, in the above embodiment, the cooling air passage (14) is formed to extend downward, but the present invention is not limited to this. Depending on the situation, for example, the cooling air passage (14) may be formed to extend at right angles or in the transverse direction.

When the cooling air passage (14) is formed to extend laterally, correspondingly, the radiation fins (15)
Arrange horizontally. Even when implemented in this manner, substantially the same effects as in the above embodiment can be obtained.

[Effects of the Invention] As shown in L below, the elevator control panel of the present invention has a cooling air inlet and a cooling air outlet at two different positions in the casing that accommodates various electrical components for elevator control. established,
A cooling air passage is formed in a part of the housing to guide the cooling air from the cooling air inlet to the cooling air outlet. A heat dissipation fin on which an electrical component that requires heat dissipation such as a high-power semiconductor element is mounted is arranged, and an inspection window is formed in the casing so as to face the pleated heat dissipation part of the heat dissipation fin. The cover member is provided so that it can be opened and closed.

Therefore, during maintenance and inspection work, when the cover member is removed and the inspection window is opened, the pleated heat dissipating portions of the heat dissipating fins are exposed to the outside of the casing. can be easily inspected, and dust adhering to the pleated heat radiating portion can be easily cleaned and removed. As a result, the cooling efficiency of the radiation fins can be maintained at a good level at all times with simple maintenance and inspection work, thereby preventing failures due to high-temperature heat generation in electrical parts that require heat radiation, such as high-power semiconductor elements.

Moreover, since it is only necessary to provide an inspection window and a cover member, the above-mentioned effects can be obtained with a simple and economical configuration.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view showing an elevator control panel according to an embodiment of the present invention, FIG. 2 is a front view showing the entire elevator control panel of FIG. 1, and FIG. 3 is a right side view of FIG. 2. Figure, 4th
The figure is a sectional view taken along the line A-A in Figure 2, Figure 5 is a front view of a conventional elevator control panel, Figure 6 is a side view of Figure 5, and Figure 7 is taken along the line B-B in Figure 5. FIG. In the figure, 11: Housing, 12: Cooling air inlet, 13
: cooling air outlet, 14: cooling air passage, 15: heat radiation fin, 16: pleated heat radiation part, 17: heat radiation required electrical component, 20: inspection window, 21: cover member. In the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts. Agent: Patent attorney Masuo Oiwa and two others Figure 2 Figure 3 Figure 7 1゜Procedure amendment'' (voluntary) March 8, 1990

Claims (1)

[Claims] (1) a casing that accommodates various electrical components for elevator control; a cooling air inlet and a cooling air outlet provided in two different positions of the casing; formed in a part of the casing; a cooling air passage that guides the cooling air from the cooling air inlet to the cooling air outlet; and a cooling air passage disposed within the cooling air passage, having a pleated heat radiation part, and mounting an electrical component that requires heat radiation among the electrical components. A control for an elevator, comprising: a heat dissipation fin; an inspection window formed in a housing so as to face the pleated heat dissipation portion of the heat dissipation fin; and a cover member that covers the inspection window in an openable and closable manner. Board.