JPH0723829B2 - Controller box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a controller box that is provided in a device such as a commercial refrigerator and controls its operation.

(B) Conventional Technology In recent years, operation control of equipment has become complicated and sophisticated, and accordingly, the internal circuit configuration of the controller box has also become complicated, and the number of circuit components and control knobs to be used has increased. Therefore, unless proper measures are taken in terms of heat dissipation and cooling of the parts that generate heat significantly, the internal temperature of the controller box rises, which causes a situation in which an accurate operation control state cannot be exhibited. Therefore, as disclosed in Japanese Utility Model Laid-Open No. 62-142691, the electric equipment box 22 provided for controlling the cooling operation of a prefabricated freezer or the like has a relatively small heat generation with a power source room 43 for storing parts that generate heat significantly. Control room to store the parts
44 is provided separately, and the boundary between both chambers 43, 44 is partitioned by a partition wall made of a magnetic material for heat transfer and electromagnetic shielding. In order to improve the heat radiation of the power supply room 43, intake / exhaust holes 48, 71 for taking in and exhausting outside air are provided on the peripheral wall of the room. Also,
As shown in FIG. 4 of the specification of the publication, outside air is also passed from the intake hole 71 to the exhaust hole 48 through the connection port 70 to the room 59 in which the control knobs related to the internal temperature control, the defrost control, etc. are arranged. It has been devised so that it can be radiated to the chamber to radiate heat.

(C) Problems to be Solved by the Invention As described above, the controller box requires sufficient measures in terms of heat dissipation and cooling of its internal heat, but the other important point is that the controller box is splashed with water or If water invades, it will lead to failure of circuit parts and control will be impossible. Therefore, it is necessary to take thorough waterproofing measures. Especially in refrigeration equipment that is closely related to the water environment, such as commercial refrigerators that are installed in kitchens that often use water, various control knobs must be attached to the front or side of the controller box. In many cases, water is likely to be splashed, and there is a particularly strong concern that water will enter from the mounting hole portion, which becomes a problem. In the above publication, a means for closing with the lower door 26 and the like is taken, but it is structurally complicated, and it is hard to say that a sufficient effect can be obtained with a simple configuration for both heat dissipation and waterproofing. there were.

The present invention has been made in view of the above points, and is improved to enable the mounting structure of the control knob that can sufficiently radiate and cool the controller box and sufficiently prevent water from entering from the outside. It is intended to provide a controller box having a simple configuration.

(D) Means for Solving the Problems The present invention is a controller box installed on a top plate of a device body, wherein
An opening for intake of outside air is provided, and an operating knob for controlling operation of equipment is attached to this opening in a loosely inserted state, and an intake hole for intake outside air is provided in the upper part of the controller box. .

(E) Operation Various control knobs, such as a thermostat knob for controlling the temperature inside the refrigerator, are installed at the bottom of the controller box to prevent water from entering. Then, the attachment hole of the knob is used as an intake of outside air that guides into the control box for cooling, and the intake air is discharged with internal heat from an exhaust hole provided at the top of the controller box, Sufficient heat dissipation and cooling of the controller box.

(F) Example An example of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, reference numeral 1 is a commercial refrigerator installed in a place where water is often splashed, such as a kitchen, having a door 2 for freely opening and closing the inside of the refrigerator, and a main body 1
A machine installation space 4 is composed of a side peripheral wall 5 and a front panel plate 6 that can be opened and closed forward on the top plate portion 3. A condensing unit 7 including a compressor, a condenser and the like is installed in the machine installation space 4, and a controller box 8 is housed and installed. The 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 so as to attain a desired internal cold storage temperature or at a set defrosting cycle. Therefore, the controller box 8 is provided with a knob for controlling the setting of the internal temperature and a knob for adjusting the setting of the defrosting cycle which are operated by the administrator.

FIG. 3 shows the controller box 8 in which the operation knobs 9 and 9 of the thermostat for adjusting the internal temperature of the operation knobs are provided on the lower surface 8B of the controller box body 8A.
It is shown. The controller box 8 is its main body
When installed by the mounting feet 10, 10 at both ends extending longer than the lower surface portion 8B of 8A, a space 11 is provided between the top plate portion 3 of the refrigerator body 1 and
Therefore, air cooling can be made effective. The operation knobs 9 and 9 of the thermostat are inserted into the circular openings 12 and 12 formed in the lower surface 8B of the controller box 8 for intake of outside air, and the periphery of the operation knobs 9 and 9 and the circular opening 12 and Gaps 13, 13 are formed between the air and 12 so that the air enters the controller box 8 from here. Then, in this way, the operation knob is attached to the lower surface 8B of the controller box 8.
By installing 9,9, intrusion of water from the outside can be prevented. Reference numeral 14 denotes a front lid of the controller box 8, which allows a user to see through the display condition when the control conditions such as the set temperature and the defrost cycle are displayed by a plurality of indicator lights on a display plate described later. So that the corresponding windows 15,15 ...
The display panel 16 equipped with is installed. A large number of wires are connected between the controller box 8 and the drive unit of the condensing unit 7 to exchange control signals. A coupler is used for the wiring connection, and a large number of mounting holes 17, 17 ... For the coupler are provided on one side surface of the controller box body 8A as shown in FIG. Mounting holes for these couplers 17,1
Not all 7 are filled with couplers, but in general, a large number of mounting holes 17, 17 ... are provided so that the controller box 8 can be commonly used for refrigerators of each model, and the required couplers for each model are supported. The method of embedding and fixing in the place to be taken is taken. Therefore, the mounting holes 17, 17 ... Which are not filled with the coupler are exposed. The open holes 17, 17 ... Which are not filled are used as exhaust holes for the external air that has entered the controller box 8 through the gaps 13, 13 with the operation knobs 9, 9. Reference numeral 18 is a cover that covers these openings 17, 17 ... And forms an exhaust passage 19. Next, referring to FIG. 3 and FIG. 4, the structure inside the controller box 8 will be further explained. Reference numeral 20 is a controller board, which is provided with a heat radiating plate 21 at an end thereof and is provided with a temperature regulator such as a thermostat. The shaft portions 22,22 to which the operating knobs 9,9 are attached are exposed. 23 is a display board provided on the controller board 20,
In addition to a large number of indicator lights 24, 24, integrated circuit elements 25, etc. are arranged. 26 is the top lid of the controller box, and 27, 27 ... are mounting screws. Therefore, the display board 23 integrated with the controller board 20 is housed in the controller box body 8A, and the front cover 14, the top cover 26, and the mounting screws 27, 27 ...
The display board 23 and the like are fixed together, and the operating knob 9,9
Through the circular openings 12, 12 and attached to the shaft portions 22, 22 on the adjuster side. The cover 18 is also attached with screws 27, 27. In this way, the controller box 8 is assembled and constructed, and finally the front panel plate 6 which is screwed onto the top plate portion 3 of the refrigerator body 1 by the mounting feet 10 and 10 thereof is provided with the display window portion 6A. The set control contents, that is, the display form of the indicator light can be understood. As a result, as shown in FIG. 5, since the operating knobs 9, 9 for setting the temperature are in a state of being installed in the lower part of the controller box 8, even if the controller box 8 is splashed with water, the operating knobs 9, Water does not enter the inside through the 9 mounting holes 12 and 12. Further, air is allowed to enter through the mounting holes 12 and 12 as shown by the arrow, and is discharged from the coupler mounting hole 17 in the upper part of the controller box 8 so that the heat radiating plate 21
The heat generated from the control box 8 is released to the outside of the control box 8 so that the cooling can be sufficiently performed.

(G) Effect of the Invention As described above, according to the present invention, in the controller box for controlling the operation of the equipment, the outside air intake hole is provided in the lower surface of the controller box, and the operation condition of the equipment is set in the intake hole. The operation knob is installed around it, leaving a gap, that is, the outside air intake part, and the inlet air discharge hole is provided above the controller box. Even if water is splashed on the controller box, the hole where the operation knob is attached,
That is, since the outside air intake hole is located in the lower part, there is no concern that water will enter from there, and the waterproof function is sufficiently performed. In addition, the heat generated in the controller box passes through the inside of the controller box from the outside air intake hole, and is released together with the invading air flowing out of the discharge hole, so that an efficient cooling effect can be obtained. Therefore, it is possible to provide a controller box that can effectively prevent the intrusion of water into the controller box and release the heat in the controller box to the outside with a simple structure, and can expect the reliability to be improved.

[Brief description of drawings]

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 part of the refrigerator, and FIG. 3 is an external perspective view of the controller box. FIG. 4 is an exploded perspective view of 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
...... Operating knob, 12,12 …… Opening hole for outside air intake, 17,17 ……
Intake air exhaust hole.

Claims (1)

[Claims] 1. A controller box installed on a top plate of a device body, wherein an opening for taking in outside air is provided in a lower surface of the controller box, and an operation knob for controlling operation of the device is provided in this opening. Is mounted in a loosely inserted state, and a controller box is provided with an intake hole for taking in outside air at the upper part of the controller box.