JPH0332905Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an outdoor unit of a refrigeration system, and more specifically relates to an outdoor unit of a refrigeration system that can be easily diagnosed for failure.

(Prior art) For example, as a specific example of an outdoor unit of a refrigeration system configured as a separate type air conditioner,
There is an apparatus described in Japanese Patent No. 76970, which is shown in a plan view in FIG. 3 and in a partial side view in FIG. As shown in Fig. 3, the main casing 3
1 includes a heat exchanger chamber 34 in which an outdoor heat exchanger 32 and an outdoor fan 33 are arranged;
4 and a compressor chamber 36 separated by a partition plate 35. In the lower part of this compressor chamber 36, other necessary equipment of the refrigerant circuit such as a compressor 37 is installed. It is located. An electrical component room 39 is provided in the upper part of the compressor room 36, which is divided by an upper and lower partition plate 38, and electrical control equipment necessary for automatic operation control of the air conditioner is arranged in this electrical component room 39. There is.

By the way, in recent years, for example, with the adoption of compressors with variable compression capacity using inverters, and the advancement of digital control technology, sensors for various temperature detection, refrigerant pressure detection, supply current detection, etc. have been incorporated, and the It is becoming possible to perform more and more delicate automatic temperature control, and along with this, more complex and sophisticated control is required. Furthermore, in order to always perform stable automatic operation, vehicles are becoming equipped with abnormal state detection sensors and protective functions according to the detected values.

Such a control circuit is arranged in the electrical component room 39, but as it becomes more complex and sophisticated, for example, when a failure occurs, it requires more specialized knowledge to find the cause. , and it is beginning to require a great deal of effort. Therefore, in order to make it easier to understand the status during inspection or when a failure occurs, it has become essential to have a failure diagnosis display means that displays the normal status of various sensor detection values and the normal operation of each functional block. Recently, the electric component room 39 is equipped with a fault diagnosis display function that displays the location of the fault to maintenance workers using, for example, an LED.

(Problems that the invention aims to solve) However, in the past, the number of failures and inspections was small, and as a result, the use of the above-mentioned fault diagnosis indicator lamps was low, and the system was targeted at maintenance workers with specialized knowledge. Therefore, no particular consideration was given to ease of confirmation and other considerations. In other words, for example, when performing troubleshooting work, the entire top plate or side panel of the outdoor unit main body casing is removed to expose the electrical component compartment, and then the troubleshooting display placed dotted on the circuit board, etc. It is necessary to compare the blinking status of the lamp with work procedure manuals, etc., confirm the contents of the abnormality indicator lamp, and find the location of the failure. Therefore, it takes time to confirm the location of abnormality during repairs and inspections, and it is also necessary to remove the top plate, etc. in rainy weather, so it is necessary to first deal with rain falling into the interior of the outdoor unit. This made the work even more complicated. In addition, if the indicator lamp is obscured by a bundle of wires and is difficult to see, it may be necessary to insert your hand and move the bundle of wires. However, performing the above-mentioned manual insertion work was also a safety problem.

This invention was made in order to solve the above-mentioned conventional problems, and its purpose is to make it easy to confirm the location of the failure using the failure diagnosis display means.
Therefore, it is an object of the present invention to provide an outdoor unit for a refrigeration system that can speed up inspection services and repairs.

(Means for solving the problem) Therefore, the outdoor unit of the refrigeration system of this invention is a refrigeration system in which an electrical component box 8 containing electrical components is attached to one side plate 5 side of the outdoor unit main body casing 1. In this outdoor unit, a display means 24 for displaying failure diagnosis is arranged on the side plate 5 side of the circuit board 12 installed upright in the electrical component box 8, and the display means 24 is arranged on the side plate 5. In this configuration, an external opening 21 is provided for use, and a removable blind cover 19 is attached to this external opening 21.

(Function) In the outdoor unit of the refrigeration system having the above configuration, an external opening 21 is provided in the one side plate 5 of the main body casing 1, and when the blind cover 19 attached to this external opening 21 is removed, Through this external opening 21, display means 24 for displaying failure diagnosis, which is centrally arranged inside the main casing 1, can be observed. Therefore, conventionally, the work to check the failure diagnosis indicator lamps was started by removing the top plate or the entire side plate of the main body casing 1, but it was now necessary to open the external opening 21 necessary for observing the display means 24 arranged in a concentrated manner. This can be done by simply removing the covering blind lid 19, and the display can be checked at a glance, so inspection services and repairs can be speeded up.

(Example) Next, a specific example of this invention will be described in detail with reference to the drawings.

Figures 1 and 2 show that this invention is applied to the outdoor unit of a refrigeration system that has an inverter-type compressor with variable compression capacity and is configured as a multi-type air conditioner to which four indoor units can be connected. An application example is shown, and FIG. 2 is a partial perspective view showing the internal structure of the outdoor unit. As shown in the figure, the interior of the main body casing 1 of this outdoor unit includes a heat exchanger chamber 4 in which an outdoor heat exchanger 2 and an outdoor fan 3 are installed facing each other, and one side plate 5 of the main body casing 1. It is divided into an equipment room 6 provided on the side. On the lower side of this equipment room 6, other necessary equipment constituting the refrigerant circuit, such as a compressor 7, is arranged.
An electrical component box 8 containing electrical components necessary for controlling the operation of this device is attached to the upper side of the equipment room 6. This electrical component box 8 has a structure in which the periphery except the top surface is almost surrounded, and semiconductor elements such as power transistors necessary for the inverter circuit are made of an aluminum plate with heat dissipation fins 9 on the side of the heat exchanger chamber 4. The other electrical components are attached to the bottom surface and other side wall surfaces. Three circuit boards 11, 12, and 13 are installed inside for automatically controlling the operation of this device. On the side wall surface 14 of the electrical component box 8 on the side plate 5 side, a power terminal board 15 is installed.
Connecting terminal boards 16 to the four indoor units are attached, and two of the circuit boards 12,
Internal openings 17 and 18 are provided at positions where the end faces of the 13 side plates 5 can be viewed from the side plates 5, respectively. On the other hand, a removable blind cover 19 is screwed to the side plate 5. Note that 20 is a cover that covers the connection joint of the refrigerant pipe.

FIG. 1 is a partial perspective view showing the side plate 5 side with the blind lid 19 removed, and as shown in the figure, the side plate 5 is provided with an external opening 21 that is shielded by the blind lid 19. Through this external opening 21, the side wall surface 14 of the electrical component box 8 described above can be viewed, as shown in the enlarged view of section A in the figure. That is, the power terminal board 15 and the four connection terminal boards 1
6 and an internal opening 1 provided in the side wall surface 14.
The end surfaces of the circuit boards 12 and 13 erected inside the electrical component box 8 can be viewed through them. Three slide switches 22 for forced operation, for example, are attached to one circuit board 13, and these switches 22 can be operated through this external opening 21. Also, the side plate 5 of the other circuit board 12
At the side end, two rotary type operation switches 23 and a display lamp group 24 composed of LEDs that serve as display means for failure diagnosis are arranged in a concentrated vertical line. 24
can be observed from the outside of the outdoor unit main body casing 1 through the external opening 21 and the internal opening 17. Note that 25 in the figure is a terminal for connecting a ground wire.

In the device configured as described above, at the time of service inspection or when a failure occurs, the internal circuit board can be accessed through the external opening 21 and internal opening 17 by simply removing the blind cover 19 attached to the side plate 5. The display lamps 24 for fault diagnosis, which are arranged in a concentrated manner at 12, can be observed. Therefore, in the past, for example, when a failure occurred, it was necessary to perform the above-mentioned complicated work or work that had safety issues before confirming the location of the failure.
In the above embodiment, it is extremely easy to check the location of the failure by simply removing the blind cover 19, and it can be done in a short period of time, and there is no danger involved, and necessary measures such as the next repair work can be taken immediately. can be moved to. Furthermore, in the above embodiment, when performing external wiring work such as power supply wiring or outdoor unit connection wiring, the connection terminal board is provided in a position where connection can be made through the external opening 21, and forced operation is possible. The operation switch for changing operations necessary for inspections such as the above can also be operated through the external opening 21, and the workability of these operations has also been greatly improved.

Note that the above embodiment is based on a multi-type air conditioner that can add up to four indoor units.
Therefore, in consideration of the workability of the wiring work at the time of expansion, the communication terminal board is arranged at a position facing the external opening 21, and for this purpose, the side wall surface 14 to which this communication terminal board is attached is erected. This side wall surface 14 is provided with an internal opening 12 through which a failure diagnosis indicator lamp 24 can be observed, but for example, when the outdoor unit is for one room only and wiring work only needs to be done when installing the outdoor unit, etc. In this case, the terminal board may be placed in a different position, and therefore no side wall may be provided on the side plate 5 side of the electrical component box 8, and in this case, the internal opening 17 is not required. Further, for example, although an example has been described in which the blind cover 19 is fixed with screws, the above-mentioned embodiment is not intended to limit this invention, and various modifications can be made within the scope of this invention.

(Effects of the invention) As explained above, in the outdoor unit of the refrigeration system of this invention, a display means for displaying failure diagnosis is provided on one side plate of the main body casing of the circuit board installed upright in the electrical component box. are arranged in a concentrated manner, and an external opening to which a removable blind cover is attached is provided in the side plate at a position where the display means can be observed from the outside. Therefore, in the event of a failure, simply by removing the blind cover, the failure diagnosis display means can be observed, and the location of the failure can be easily confirmed, thereby speeding up inspection services and repairs. can.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view showing the external appearance of an outdoor unit of a refrigeration system according to an embodiment of this invention, with an enlarged view of the main parts, and Fig. 2 is a partial perspective view showing the internal structure of the apparatus shown in Fig. 1. , Figure 3 is a plan view of the conventional device,
4 is a partial front view of the apparatus of FIG. 3; FIG. 1... Main body casing, 5... Side plate, 8... Electrical component box, 12... Circuit board, 19... Blind lid, 21
... External opening, 24 ... Display lamp (display means).

Claims (1)

[Scope of utility model registration request] This is an outdoor unit of a refrigeration system, in which an electrical component box 8 containing electrical components is attached to one side plate 5 side of an outdoor unit main body casing 1, and a circuit board installed upright in the electrical component box 8. In addition to arranging display means 24 for failure diagnosis display on the side plate 5 of 12, an external opening 21 for observing the display means 24 is provided in the side plate 5, and a removable blind cover 19 is provided in the external opening 21. An outdoor unit of a refrigeration system, characterized in that the outdoor unit is attached to the refrigeration system.