JPH05196329A - Operation controller of refrigerating machine - Google Patents

Abstract

PURPOSE:To prevent a recurrence of the same trouble after a restoration when a trouble once occurs in a refrigerating machine. CONSTITUTION:When a refrigerating machine falls in a trouble, devices are fixed in an abnormality treating mode by a trouble-period controller 51, and when a trouble repairing is completed, the control of trouble-period controller 51 is released so that the operation can be restored to the normal state by a reset device 52. Data on the action states of the devices before the trouble are stored in a memory 12 when the trouble occurs, and a memory hold device 53 holds the contents of the memory 12 at the time of the reset by the reset device 53. After that, the data before the trouble are displayed on a display device 2 by a display controller 54 according to instructions, so that the troubled parts can be properly recognized during maintenance and inspection and the recurrence of the same trouble can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for a refrigeration system, and more particularly to measures for preventing recurrence of the same failure after recovery from the failure.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Unexamined Patent Publication No. 3-54253.
As disclosed in Japanese Patent Publication, as a refrigeration device operation data display device in which each device such as a compressor and a heat exchanger is arranged in a refrigerant circuit, an abnormality occurs when each device fails during operation of the refrigeration device. It is a well-known technique to display what has been done and to display the elapsed time from the start of operation to the occurrence of an abnormality.

Data relating to the operating state of each device before the failure, such as the operating capacity of the compressor, the cumulative operating time, the pressure sensor value, the temperature sensor value, etc., are displayed as data necessary for repairing the failure. Those which are adapted to be used are also known as general techniques.

[0004]

By the way, in the above-mentioned conventional device, when the repair is completed, the reset operation for returning to the normal operation erases the data relating to the operating state before the failure. That is, after the repair of the failure is completed and the operation is returned to the normal operation, if the data regarding the operating state of each device before the failure is displayed, there is a possibility that an erroneous operation may be caused.

On the other hand, in the refrigerating apparatus, the same failure is often repeated, and in this case, even after the failure is recovered and the normal operation is restored, the operating state of each equipment before the failure is inspected during maintenance and the like. If there is data on the above, it is possible to take measures to prevent the recurrence of the failure, such as accurately inspecting the location causing the failure. However, in the case where the data before the failure is erased along with the reset operation at the time of returning to the normal operation like the above-mentioned conventional one, the data before the failure cannot be known, which may cause the recurrence of the same failure. was there.

The present invention has been made in view of the above points, and an object thereof is to provide means for confirming data on the operation of each device before the previous failure at the time of maintenance and inspection after the failure recovery. This is to prevent recurrence of the same failure.

[0007]

In order to achieve the above object, the solution means of the present invention relates to the operating state of each device before the failure when resetting for returning to the normal operation after the recovery of the failure. The purpose is to know the failure location accurately by retaining the data without erasing and displaying the data as needed after the normal operation is restored.

Specifically, the means taken by the present invention, as shown in FIG. 1, is provided with a display device (21) for displaying the operating state of equipment such as a compressor, an indoor / outdoor fan, and sensors. The target is the operation control device of the refrigeration system.

When the refrigeration system is out of order, the operating condition of each device of the refrigeration system and the display condition of the display device are fixed to the abnormal processing mode. Reset means (5) for canceling the control of the failure control means (51) so as to enable the recovery of
2) and are provided.

Further, the storage means (12) for storing data on the operating state of each device before the failure and the storage means (12) when the control of the failure time control means (51) by the reset means (52) is released. ), Which stores the stored content of the storage means (53) and controls the stored content of the storage means (12) to be displayed on the display device (21) in response to a command after the normal operation of the refrigeration system is restored. And a display control means (54) for performing such control.

[0011]

With the above-described structure, in the present invention, when a failure occurs in a device such as a compressor, a fan, a temperature sensor, etc. during operation of the refrigeration system, the failure control means (51) causes each device of the refrigeration system to operate. The operating state is fixed to the error handling mode. Then, when the repair of the failure is completed, the reset means (52)
Thus, the control of the failure control means (51) is released, and the normal operation can be restored.

At this time, when a failure occurs, the storage means (12) stores data relating to the operation of each device before the failure, and the storage holding means (53) resets the failure mode by the resetting means (52). At any time, the storage content of the storage means (12) is controlled to be retained. Then, after that, in accordance with the command, the display control means (54) displays on the display device (21) the data on the operation of each device before the failure stored in the storage means (12). By confirming the data before the failure at the time of inspection, the cause of the failure can be accurately identified and the recurrence of the same failure can be prevented.

[0013]

Embodiments of the present invention will be described below with reference to the drawings starting from FIG.

FIG. 2 shows a schematic structure of an operation data display device for a refrigerating machine. (1) is a controller body of the refrigerating machine, and the controller body (1) is necessary for operating the refrigerating machine. Storage device for storing data (1
1) is built-in, and further, in the storage device (11), data regarding the operating state of the refrigerant circuit before the failure, such as the operating capacity of the compressor, the integrated operating time, the air volume of the indoor / outdoor fan, the pressure sensor value, An operation data storage unit (12) is provided as a storage unit that stores data such as a temperature sensor value. Further, (2) is a remote control device which is configured to be able to send and receive signals to and from the main body part (1) of the controller, and which remotely commands the control operation of the main body part (1) of the controller. ) Indicates a display section (21) as a display device for displaying data on the current operating state, information on control commands, etc., and the operation of each device of the refrigeration system and data to be displayed on the display section (21). First to fifth keys (22) to (26) for instructing the command etc. are provided.

Next, the flow chart of FIG. 3 shows the contents of the operation control of the refrigerating apparatus. While the normal operation is being carried out in step ST1, while the normal operation is being carried out, in step ST2, the current status of each device according to the command is given. In addition to displaying a menu for sequentially displaying the operating state and the detected values of various sensors on the display unit (21),
If a failure occurs in the refrigeration system in the determination in step ST3, the process proceeds to step ST4 and the following abnormality processing is performed.

That is, in step ST4, data relating to the operating state of the refrigerant circuit before the failure is stored in the data storage section (12). At this time, for other failures before the failure, the data stored at that time is erased by updating. Next, step ST5
Then, the operation of the refrigeration system and the display on the display unit (21) are controlled in the abnormality processing mode. Then, in this state, the refrigeration system is repaired for failure, the repair is completed, and in step ST6,
When the reset key operation is performed by pressing the keys (22) to (26), the process proceeds to step ST7 to cancel the abnormality processing mode. At this time, the data relating to the operating state during the abnormality processing is erased, but the above step ST4
The data before the failure stored in step 3 is retained without being erased.

Then, in step ST8, the operation is returned to normal operation, and along with this return to normal operation, step ST9
Then, the display of the display unit (21) is returned to the normal display menu, but the special key operation (for example, pressing the first and second keys (22) and (23) at the same time) is determined in step ST10.
Then, the process proceeds to step ST11, the data before failure is read from the operation data storage section (12) of the controller main body section (1), and the data before failure is displayed on the display section (21) at step ST12. indicate.

Further, FIG. 4 shows the contents of the control for performing a trial run at the time of installing the refrigeration system, maintenance and inspection, etc. When the trial run key operation is performed in step SR1, step SR
In step 2, the menu display in the normal operation is changed to the display in the test operation mode. Further, if the menu display key operation is performed in step SR3 during this time, the process proceeds to step SR4 to display the menu. In other words, by sequentially displaying the current operating state of each device and the detected value of each sensor, etc., it is possible to change the set value of each device and adjust the sensors to improve work efficiency. .

In the above flow, the control in step ST5 constitutes the failure control means (51) according to the present invention, and the control shifting from step ST6 to step ST7 constitutes the reset means (52) and step ST7. The storage holding means (53) is configured by the control of step ST1, and the display control means (54) is configured by the control of steps ST11 and ST12.

Therefore, in the above embodiment, when a failure occurs in the compressor, fan, temperature sensor, etc. during operation of the refrigerating apparatus, the failure control means (51) causes the operating state of each apparatus of the refrigerating apparatus. Is fixed to the error processing mode.
When the repair of the failure is completed, the reset means (5
By 2), the control of the failure control means (51) is released, and the normal operation can be restored.

At that time, if the data related to the operating state of each device before the failure is reset due to the cancellation of the abnormality processing mode, the cause of the failure cannot be identified during the subsequent maintenance inspection, and the same failure occurs. May cause a recurrence of
In the above embodiment, when a failure occurs, the operation data storage unit (12) stores the data regarding the operation of each device before the failure, and the storage holding unit (53) causes the reset processing unit (52) to perform the abnormality processing mode. Even at the time of resetting, the stored contents of the operation data storage unit (12) are controlled to be retained.

If necessary, the display control means (5
4), the data related to the operation of each device before the failure stored in the operation data storage unit (12) is displayed in the display unit (2).
Since it is displayed in 1), the cause of the failure can be accurately identified by checking the data before the failure at the time of maintenance and inspection, and the recurrence of the same failure can be prevented.

In the above embodiment, when a new failure occurs, the data before the failure is erased for the failure before that, but the present invention is not limited to this embodiment. For example, the data before the failure may be retained for each failure.

[0024]

As described above, according to the present invention,
In a refrigeration system operation control device that displays the operation of equipment such as a compressor on the display device, if a failure occurs in the refrigeration equipment, the operation status of each equipment and the display status of the display device are fixed to the abnormal processing mode. When the repair of the failure is completed, the abnormal processing mode is released by reset, while the data related to the operation of each device before the failure is stored when the failure occurs, and the data related to this operation is not erased even when the abnormal processing mode is reset. Since the stored contents are displayed on the display device in response to the command while retaining the same, it is possible to accurately identify the cause of the failure during maintenance and inspection. Can be prevented in advance.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of the present invention.

FIG. 2 is a diagram showing a schematic configuration of an operation data display device for a refrigeration system according to an embodiment.

FIG. 3 is a flowchart showing the control contents related to the display of operation data of the controller during normal operation.

FIG. 4 is a flowchart showing the control contents related to the display of operation data during a test operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control device 12 Operation data storage unit (storage unit) 21 Display unit (display unit) 51 Failure control unit 52 Reset unit 53 Storage holding unit 54 Display control unit

Claims (1)

[Claims] 1. An operation control device for a refrigerating machine, comprising a display device (21) for displaying an operating state of devices such as a compressor, an indoor / outdoor fan, and sensors, wherein the refrigerating machine is operated when the refrigerating machine fails. The failure control means (51) for fixing the operating state of each device and the display state of the display device to the abnormal processing mode, and the failure control means (so as to enable the return to the normal operation when the repair of the failure is completed). A resetting means (52) for canceling the control of (51), a storage means (12) for storing data relating to the operating state of each of the devices before the failure, and a failure control means (52) by the resetting means (52). When the control of (51) is released, the storage means (53) for controlling the storage content of the storage means (12) to be retained, and after the normal operation of the refrigeration system is restored, the storage means (12) stores the stored contents. Record Display control means controls to the contents displayed on the display device (21) (5
4) The operation control device for a refrigerating apparatus, comprising: