JPH03156278A - Controller box - Google Patents

Abstract

PURPOSE:To sufficiently radiate heat and cool and to sufficiently prevent invasion of water from an exterior by providing an atmosphere intake opening at the lower surface of a controller box, movably mounting an operation knob for controlling operation of a device in the opening, and forming an intaken atmosphere discharge hole at the upper part of the box. CONSTITUTION:Operation knobs 9, 9 of a thermostat are respectively inserted into atmosphere intake circular openings 12, 12 opened at the lower surface 8B of a controller box 8, and gaps 13, 13 are formed between the peripheries of the knobs 9, 9 and the openings 12, 12 to introduce the air into the box 8. Thus, the knobs 9, 9 are mounted on the lower surface 8B of the box 8 to prevent invasion of water from an exterior. The air is introduced from the openings 12, 12 as shown by an arrow, discharged from an opening 17 for mounting a coupler of the upper part of the box 8 to externally discharge heat from a heat sink plate 21 our of the box and to sufficiently cool it.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a controller box that is installed in equipment such as commercial refrigerators and controls the operation thereof.

(B) Prior Art In recent years, the operational control of equipment has become more complex and sophisticated, and the internal circuit configuration of controller boxes has also become more complex, and the number of circuit components and control children used has also increased. Therefore, unless sufficient measures are taken to dissipate and cool the parts that generate significant heat, the internal temperature of the controller box will rise, resulting in a situation where accurate operational control cannot be achieved. Therefore, as shown in Japanese Utility Model Application Publication No. 63-142691, the inside of the electrical equipment box 22 provided for controlling the cooling operation of a prefabricated freezer etc. is divided into a power supply room 43 that stores parts that generate a lot of heat, and a power supply room 43 that stores parts that generate a lot of heat. A separate control room 44 is provided to store the components, and the boundaries between the two rooms 43 and 44 are partitioned with a partition wall made of magnetic material for heat transfer and electromagnetic shielding. In order to do this, an air intake/exhaust hole 48 is provided in the peripheral wall of the room to take in and exhaust outside air.
71 has been established. In addition, as shown in FIG. 4 of the specification of the same publication, outside air is also passed through the connecting lower 0 to the room section 59 where the control children related to internal temperature control, defrosting control, etc. are arranged, and from the intake hole 71 to the exhaust hole. 48 to dissipate heat.

(C) Problems to be Solved by the Invention As described above, the controller box requires sufficient measures to dissipate and cool its internal heat, but there are also other important issues such as water splashing on the controller box and If water enters the system, circuit components will fail and control will become uncontrollable, so it is necessary to take thorough measures against waterproofing. In particular, in refrigeration equipment that is closely related to the water environment, such as commercial refrigerators installed in kitchens that use a lot of water, various control offspring are often attached to the front or side of the controller box. In that case, it is easy to get wet with water, and there is a particularly strong concern that water may enter through the mounting hole, which poses a problem. In the above-mentioned publication, a means of closing with the lower door 26 or the like is taken.

It is structurally complex, and it is difficult to say that a simple structure can provide sufficient effects in both heat dissipation and waterproofing measures.

The present invention has been made in view of the above points, and has been developed to provide an improved mounting structure for a control heir that can sufficiently dissipate and cool the controller box and sufficiently prevent water from entering from the outside. The purpose is to provide a controller box with a simple configuration.

(d) Means for Solving the Problems The present invention provides a controller box installed on the top plate of the main body of the device, in which the lower surface of the controller box includes:
A hole is provided for the intake of outside air, an operation knob for controlling the operation of the equipment is loosely inserted into this hole, and a discharge hole for the intake outside air is provided in the upper part of the controller box. .

(E) Function Various control units, such as a thermostat unit for controlling the internal temperature, are provided at the bottom of the controller box to prevent water from entering. Then, the eldest child's mounting hole is guided into the controller box for cooling (it is used as an intake port for outside air, and the intake air is released along with internal heat through the exhaust hole provided at the top of the controller box). Enables sufficient heat dissipation and cooling of the controller box.

(f) Example An embodiment of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a commercial refrigerator installed in a place where water is often splashed, such as a kitchen.
A machine installation space 4 is provided on the top plate 3 of the machine, and is composed of a side peripheral wall 5 and a front panel plate 6 that can be opened and closed forward. This machine! A condensing unit 7 consisting of a compressor, a condenser, etc. is installed in the equipment space 4, and a controller box 8 is also housed therein. This controller box 8 includes a microcomputer and the like, and controls the cooling operation of the refrigerator 1 under set conditions. The content of the operation control is, for example, that defrosting is performed to achieve a desired internal temperature or at a set defrosting cycle. Therefore, the controller box 8 is provided with a controller for controlling the temperature inside the refrigerator and a controller for adjusting the setting of the defrosting cycle, which are operated by the administrator.

FIG. 3 shows a controller box 8 in which operating knobs 9, 9 of a thermostat for regulating the temperature inside the refrigerator are provided on the lower surface 8B of the controller box main body 8^. The controller box 8 has mounting legs 1 at both ends extending longer than the bottom surface 8B of the main body 8A.
0.10, a space 11 is created between the refrigerator main body 1 and the top plate 3, making air cooling effective. The operation knobs 9, 9 of the thermostat are
It is inserted into the circular aperture 12.12 for outside air intake made in the lower surface part 8B of the controller box 8, and a gap 13.13 is provided between the circumference of the operating knobs 9, 9 and the circular aperture 12.12. Let it happen.

Air enters the controller box 8 from here. And like this controller box 8
By installing the operating knobs 9, 9 on the lower surface portion 8B of the holder, water intrusion from the outside can be prevented. Reference numeral 14 denotes a front cover of the controller box 8, which allows you to see through the display status when control conditions such as set temperature and defrosting cycle are displayed using a plurality of indicator lights on a display board, which will be described later. The display board 16 is equipped with corresponding windows 15, 15, . . . , respectively. A large number of wiring connections are made between the controller box 8 and the driving section of the condensing unit 7 for transmitting and receiving control signals. A coupler is used for the wiring connection,
There are many mounting holes 17, 17... of the coupler, and the fourth
As shown in the figure, it is provided on one side of the controller box main body 8A. These coupler mounting holes 17, 17
... are not all filled with couplers, but in general, so that the controller box 8 can be used commonly for each model of refrigerator, a large number of mounting holes 17, 17 ... are provided and required for every 5 models. A method is used in which couplers are embedded and fixed in corresponding locations. Therefore, there is a mounting opening 17°17... that cannot be filled with the coupler. These unfilled openings 17, 17, . . . are used as exhaust holes for external air that has entered the controller box 8 from the gaps 13, 13, . . . where the operating knobs 9, 9 are located. 18 is a cover that covers these openings 17, 17, . . . and forms an exhaust path 19. Next, the structure inside the controller box 8 will be further explained based on FIGS. 3 and 4. Reference numeral 20 is a controller board, which is equipped with a heat sink 21 at the end and a temperature regulator such as a thermostat. The shaft portions 22, 22 to which the operating knobs 9, 9 are attached are exposed. Reference numeral 23 denotes a display board superimposed on this controller board 20, and a large number of indicator lights 24, 24...
In addition, integrated circuit elements 25, etc. are arranged. 26
is the top cover of the controller box, and 27, 27
... is a mounting screw. Therefore, the display board 23 integrated with the controller board 20 is housed in the controller box main body 8A, and the front cover 1 is fitted with the mounting screws 27, 27...
4. Connect and fix the upper lid 26, display board 23, etc. together, and pass the operating knobs 9, 9 through the circular holes 12, 12,
It is attached to the shaft parts 22, 22 on the regulator side. Also, cover 1
Attach 8 with screws 27 and 27. In this way, the controller box 8 is assembled and configured, and finally its mounting feet 10.1
0, screw onto the top plate 3 of the refrigerator main body 1. The front panel board 6 is provided with a display window 6^, through which the set control contents, ie, the display form of the indicator lights can be seen. As a result, as shown in FIG. 5, the operating knobs 9, 9 for temperature setting are installed at the bottom of the controller box 8, so even if the controller box 8 gets wet, the operating knobs 9, 9, Water does not enter inside through the mounting hole 12°12 of 9. In addition, air is allowed to enter through the mounting holes 12 and 12 as shown by the arrows, and is discharged through the coupler mounting hole 17 at the top of the controller box 8, so that the heat emitted from the heat sink 21 is transferred to the outside of the controller box 8. This allows for sufficient cooling.

(G) Effects of the Invention As described above, according to the present invention, in a controller box for controlling the operation of equipment, an outside air intake hole is provided on the bottom surface of the controller box, and the operating conditions of the equipment are set in this intake hole. The operating knob is installed leaving a gap around it, that is, an outside air intake part, and a discharge hole for the incoming air is provided in the upper part of the controller box. Even if the controller box gets wet, the hole where the operating knob is attached,
In other words, since the outside air intake hole is located at the bottom, there is no need to worry about water getting in through there, and the waterproofing function is sufficient. Furthermore, the heat generated within the controller box is discharged by the intruding air that passes through the controller box through the outside air intake hole and exits through the exhaust hole, thereby achieving an efficient cooling effect. Therefore, it is possible to provide a controller box that can effectively prevent water from entering the controller box and release heat from the controller box to the outside with a simple configuration, and can be expected to improve reliability.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a commercial refrigerator equipped with the controller box of the present invention, FIG. 2 is an external perspective view showing the internal structure of the main parts of the refrigerator, and FIG. 3 is an external perspective view of the controller box. FIG. 4 is an exploded perspective view of the components of the controller box, and FIG. 5 is a simplified sectional view of the controller box. 1... Refrigerator body, 8... Controller box,
9゜9...Operation knob, 12.12...Opening hole for outside air intake, 17.17...Exhaust hole for intake outside air. Figure 1 Figure 3 Figure 2 Figure 5

Claims (1)

[Claims] In the controller box installed on the top plate of the device, an opening for outside air intake is provided on the bottom of the controller box, and an operating knob for controlling the operation of the device is loosely inserted into this hole. 1. A controller box that is attached to the controller box and has a discharge hole for taking in outside air in an upper part of the controller box.