JPH07318205A - Memory device for air-conditioning machine - Google Patents

Abstract

PURPOSE:To allow not only the indication of abnormality but also the pursuit of a cause of abnormality as well as quick treatment in the generation of abnormality by a method wherein the outputs of various detectors are stored in a memory device during the operation of an air-conditioning machine. CONSTITUTION:An air conditioning machine is provided with a suction pressure detector 12, a suction temperature detector 13, a discharging pressure detector 14, a discharging temperature detector 15, a motor current detector 16, a DC bus voltage detector 17, a radiator temperature detector 18, an inverter controller A20 and a memory device A21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner which can obtain information suitable for determining the content of abnormality detection in an inverter device for controlling a compressor motor according to a frequency command and an operation command from an air conditioner controller. Regarding a storage device.

[0002]

2. Description of the Related Art As a conventional technique, for example, Japanese Unexamined Patent Publication No. Hei 2
There is one disclosed in Japanese Patent Publication No. 164278. An example of the operation of the conventional technique will be described below with reference to the drawings.
Will be explained.

FIG. 7 is a block diagram of a conventional air conditioner. In FIG. 7, 1 is a compressor, 2 is a four-way valve, 3 is an indoor heat exchanger, 4 is a decompression device, and 5 is an outdoor heat exchanger, and these are connected in a ring to form a refrigeration circuit. 6 is an indoor fan, and 7 is an outdoor fan. Reference numeral 8 is an inverter control device that controls the rotation speed of the compressor 1, 9 is an air conditioner controller that gives a command such as an operating frequency to the inverter control device 10, and 10 is information about the abnormality when an abnormal situation occurs. An abnormality display device for displaying, and 11 is a three-phase AC power supply.

Further, the inverter control device 8 is equipped with various detecting devices in order to grasp the operating state of the air conditioner. Reference numeral 12 is a suction pressure detection device that detects the suction pressure of the compressor 1, 13 is a suction temperature detection device that detects the suction temperature of the compressor 1, and 14 is a discharge pressure detection device that detects the discharge pressure of the compressor 1. Reference numeral 15 is a device, and 15 is a discharge temperature detection device for detecting the discharge temperature of the compressor 1.
Reference numeral 16 is a motor current detection device that detects the motor current flowing through the compressor 1, 17 is a DC bus voltage detection device that detects the DC bus voltage, and 18 is a radiator temperature detection device that detects the temperature of the radiator. is there.

Suction pressure detection device 12, suction temperature detection device 13, discharge pressure detection device 14, discharge temperature detection device 15, motor current detection device 16, DC bus voltage detection device 17, and radiator temperature detection device. 18 is connected to the inverter control device 8. The inverter control device 8 is
When the inverter is in a dangerous state by the output of each detection device, a protection operation is performed and an operation to avoid the dangerous state is performed. Further, when the protection operation is performed, the abnormality display device 10 displays a protection operation performed. In addition, 19 is a power converter.

[0006]

Since the conventional display of the protection operation at the time of abnormality is limited to only the overcurrent protection display even if the overcurrent of the motor current is detected, the inverter is not used under any circumstances. There was a drawback that it was not possible to judge whether the protection operation of (3) occurred.

The present invention is intended to solve the above problems. By accumulating the outputs of various detection devices in a storage device while the air conditioner is operating, not only the error display but also information for investigating the cause of the error is obtained. The purpose is to

[0008]

To achieve this object, a storage device for an air conditioner according to the present invention comprises an output of a suction pressure detection device, an output of a suction temperature detection device, and an output of a discharge pressure detection device. , The output of the discharge temperature detection device, the output of the motor current detection device, the output of the DC bus voltage detection device, the output of the radiator temperature detection device from the inverter control device A received the data, the abnormal point of time The storage device A is provided for accumulating data during the period from the time to the specified time.

The output of the suction pressure detection device, the output of the suction temperature detection device, the output of the discharge pressure detection device, the output of the discharge temperature detection device, the output of the motor current detection device,
A storage device B that receives the data of the output of the DC bus voltage detection device and the data of the inverter control device A that receives the output of the radiator temperature detection device, and accumulates the data during the time from the time when the abnormality occurs until the specified time In addition, the storage device B is capable of retaining storage even when the power is cut off.

Further, the output of the suction pressure detection device, the output of the suction temperature detection device, the output of the discharge pressure detection device, the output of the discharge temperature detection device, the output of the motor current detection device, and the DC bus voltage detection device. And the data from the inverter controller C that receives the output of the radiator temperature detector, and if there is a previous abnormality when an abnormality occurs,
A storage device C that compares the previous and current abnormality names and, if they are different, erases the previous abnormal data, and, if they are the same, stores the data from the time when the abnormality occurs until the specified time before.
It is equipped with.

[0011]

According to the present invention, in the above-mentioned structure, when the power supply is not cut off due to an abnormality in the inverter, the operating state of the inverter at the time of the abnormality can be accurately recognized from the information obtained from the storage device. It is possible to quickly perform restoration and the like. Memory is lost when the power is cut off, but since it is stored in a general RAM, it can be easily applied at low cost.

Further, even when the power source is cut off due to an abnormality in the inverter, the storage device retains the memory. Therefore, from the information obtained from the storage device, the operating state of the inverter when the abnormality occurs Can be accurately recognized, so inspection and restoration can be performed quickly.

Further, when an abnormality occurs in the inverter, the power is not cut off, or when there is a previous abnormality when the abnormality occurs, the previous and current abnormality names are compared, and if different, the previous abnormality is detected. By deleting the data and, in the same case, accumulating the data from the time when the error occurred until the specified time before, by picking up the abnormalities that frequently occur consecutively, RAM
, And it is possible to reduce the area of the memory in which each measured value is stored, so that it can be easily applied when the capacity of the RAM is limited. Further, for abnormalities that occur continuously, immediate measures are required, and although the memory items are limited, inspections and restorations can be performed quickly.

[0014]

【Example】

(Embodiment 1) A first embodiment of a storage device for an air conditioner according to the present invention will be described below with reference to FIGS. 1 and 2. It should be noted that the same components as those of the related art are designated by the same reference numerals and detailed description thereof is omitted.

FIG. 1 is a block diagram of a storage device of an air conditioner in a first embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of the present invention.

In FIG. 1, a suction pressure detection device 12 and
The suction temperature detection device 13, the discharge pressure detection device 14, the discharge temperature detection device 15, the motor current detection device 16, the DC bus voltage detection device 17, and the radiator temperature detection device 18 are connected to the inverter control device A20. ing. In addition, the storage device A21 is connected to the inverter control device A20.

Here, the suction pressure detection device 12, the suction temperature detection device 13, the discharge pressure detection device 14, the discharge temperature detection device 15, the motor current detection device 16, the DC bus voltage detection device 17, and the heat radiation. The device temperature detection device 18 is, for example, an analog-digital converter, and the storage device A21 is a general RAM.

The operation of the storage device of the air conditioner configured as described above will be described below with reference to the flowchart of FIG.

During operation of the air conditioner, the output value of the suction pressure detection device 12, the output value of the suction temperature detection device 13, the output value of the discharge pressure detection device 14, the output value of the discharge temperature detection device 15, the motor current detection. The output value of the device 16, the output value of the DC bus voltage detection device 17, and the output value of the radiator temperature detection device 18 are used for various controls by the inverter control device A20 and are stored as information in the storage device A21 (step 1). ).

Next, it is checked whether or not any abnormal signal is input (step 2). If no abnormal signal is input, it is determined whether the accumulated information exceeds the accumulated amount for the specified time (step 3). If the accumulated amount for the specified time has not been exceeded, the process returns to step 1.

If the amount of accumulated information exceeds the specified time, the oldest information is deleted (step 4), new information is accumulated, and the process returns to step 1. In this way, when the abnormal signal is not input, the information for the latest specified time amount is updated and stored in the storage device A21.

When an abnormal signal is input, the storage device A2
To the information stored in 1 is added the name of the malfunction that has operated at that time and the operation mode of the air conditioner, and this is stored in the storage device A21 as one block (step 5).
Then, return to step 1.

With the above-mentioned configuration, when an abnormal condition occurs, it is possible to store the abnormality name, operation mode, and measurement information that operated due to the abnormality. By reading the information and analyzing it to know the surroundings where the protection worked,
It is possible to quickly investigate the cause of the abnormality and recover it.

In addition, since the present invention does not have a special storage device that retains the memory even when the power is shut off, the memory is erased when the power is shut off, but the cost can be reduced by storing it in a general RAM. This makes it easy to apply, and you can obtain data that can be used as clues for repair and investigation of the cause.

As for each detection device, a device other than those described in the present invention, for example, a motor voltage detection device or an outside air temperature detection device may be added.

(Second Embodiment) A second embodiment of the storage device for an air conditioner according to the present invention will be described below with reference to FIGS. 3 and 4. It should be noted that the same components as those of the related art are designated by the same reference numerals and detailed description thereof is omitted. FIG. 3 is a block diagram of a storage device of an air conditioner according to a second embodiment of the present invention, and FIG. 4 is a flowchart showing the operation of the present invention.

In FIG. 3, the suction pressure detecting device 12 and
The suction temperature detection device 13, the discharge pressure detection device 14, the discharge temperature detection device 15, the motor current detection device 16, the DC bus voltage detection device 17, and the radiator temperature detection device 18 are connected to the inverter control device A20. ing. The storage device B22 is connected to the inverter control device A20.

Here, the suction pressure detection device 12, the suction temperature detection device 13, the discharge pressure detection device 14, the discharge temperature detection device 15, the motor current detection device 16, the DC bus voltage detection device 17, and the heat radiation. The device temperature detection device 18 is, for example, an analog-digital converter, and the storage device B22 is an EEPROM that retains memory even when the power is cut off.

The operation of the storage device of the air conditioner configured as described above will be described below with reference to the flowchart of FIG.

During operation of the air conditioner, the output value of the suction pressure detection device 12, the output value of the suction temperature detection device 13, the output value of the discharge pressure detection device 14, the output value of the discharge temperature detection device 15, the motor current detection. The output value of the device 16, the output value of the DC bus voltage detection device 17, and the output value of the radiator temperature detection device 18 are used for various controls by the inverter control device A20 and stored in the storage device B22 as information (step 6). ).

Next, it is checked whether or not any abnormal signal is input (step 7). If there is no abnormal signal,
It is judged whether or not the accumulated information exceeds the accumulated amount for a specified time (step 8). If the accumulated amount for the specified time has not been exceeded, the process returns to step 6.

If the storage amount exceeds the specified time, the oldest information is deleted (step 9), new information is stored, and the process returns to step 6. In this way, when the abnormal signal is not input, the information for the latest specified amount of time is updated and stored in the storage device B22.

When an abnormal signal is input, the storage device B2
The information on the malfunction name and the operation mode of the air conditioner at that time is added to the information stored in 2 and stored in the storage device B22 as one block (step 1).
0). Then, the process returns to step 6.

With the above configuration, when an abnormal condition occurs, it is possible to store the protection name, operation mode and each measurement information operated due to the abnormal condition. By reading the information and analyzing it to know the surroundings where the protection worked,
It is possible to quickly investigate the cause of the abnormality and recover it. Further, since the information is stored in the EEPROM that retains the memory even when the power is cut off, there is an advantage that the information is not erased even when the power is cut off.

Incidentally, as for each detecting device, a device other than those described in the present invention, for example, a motor voltage detecting device or an outside air temperature detecting device may be added.

(Third Embodiment) Next, a third embodiment of the storage device for an air conditioner according to the present invention will be described with reference to FIGS. 5 and 6. It should be noted that the same components as those of the related art are designated by the same reference numerals and detailed description thereof is omitted. FIG. 5 is a block diagram of a storage device of an air conditioner in a third embodiment of the present invention, and FIG. 6 is a flow chart showing the operation of the present invention.

In FIG. 5, the suction pressure detecting device 12 and
The suction temperature detection device 13, the discharge pressure detection device 14, the discharge temperature detection device 15, the motor current detection device 16, the DC bus voltage detection device 17, and the radiator temperature detection device 18 are connected to the inverter control device B23. ing.

Further, the storage device C24 is connected to the inverter control device B23. Here, the suction pressure detection device 12, the suction temperature detection device 13, the discharge pressure detection device 14, the discharge temperature detection device 15, the motor current detection device 16, the DC bus voltage detection device 17, and the radiator temperature detection. The device 18 is, for example, an analog-digital converter, and the storage device C24 is a general RAM.

The operation of the storage device of the air conditioner configured as above will be described below with reference to the flowchart of FIG.

During operation of the air conditioner, the output value of the suction pressure detection device 12, the output value of the suction temperature detection device 13, the output value of the discharge pressure detection device 14, the output value of the discharge temperature detection device 15, the motor current detection. The output value of the device 16, the output value of the DC bus voltage detection device 17, and the output value of the radiator temperature detection device 18 are used for various controls by the inverter control device B23 and are stored in the work area A of the storage device C24 as information. Store (step 11).

Next, it is checked whether any abnormal signal is input (step 12). If no abnormal signal is input, it is determined whether the accumulated information exceeds the accumulated amount for the specified time (step 13). If the accumulated amount for the specified time has not been exceeded, the process returns to step 11.

If the accumulated amount for the specified time is exceeded,
The oldest data is deleted (step 14), new data is accumulated, and the process returns to step 11. In this way, when the abnormal signal is not input, the information for the latest specified amount of time is updated and stored in the work area A of the storage device C24.

When an abnormal signal is input, it is checked whether or not it is the same as the previously generated abnormality (step 15). If the previously generated abnormality is the same as the presently generated abnormality, the abnormality name and the operation mode of the air conditioner are added to the measurement data and stored in the storage area (step 16). Then, the work areas A and B are cleared (step 17). Then, the process returns to step 11.

If the previously generated abnormality is different from the abnormality that occurred this time, the abnormality name and the operation mode are added and stored in work area A (step 18), and the contents of work area B are erased (step 19). ), The next measurement data is accumulated in the work area B (step 20).

Next, it is checked whether or not an abnormal signal is input (step 21). If no abnormal signal is input, it is determined whether or not the accumulated information exceeds the accumulated amount for a specified time (step 22), If the accumulated amount for the specified time has not been exceeded, the process returns to step 20.

When the accumulated amount for the specified time is exceeded,
The oldest data is deleted (step 23), new data is accumulated, and the process returns to step 20. In this way, when the abnormal signal is not input, the information for the latest specified amount of time is updated and stored in the work area B of the storage device C24.

If an abnormality signal is input, it is checked whether or not it is the same as the previously generated abnormality (step 24). If the previously generated abnormality and the currently generated abnormality are the same, the abnormality name and operation mode are measured. And save it in the save area (step 16). Then, the work areas A and B are cleared (step 17) and the process returns to step 11.

When the previously generated abnormality is different from the presently generated abnormality, the abnormality name and the operation mode are added and saved in work area B (step 25), and the contents of work area A are erased (step 26). , Return to step 11.

With the above-mentioned configuration, when an abnormality occurs in the inverter, the power is not shut off, or when there is a previous abnormality when the abnormality occurs, the previous and current abnormality names are compared, If they are different, the previous abnormal data is deleted, and if the same, the data from the time of the abnormal occurrence to the specified time before is accumulated in the storage area, so that continuous occurrences can occur. By taking up the abnormalities that occur frequently, a general RAM can be used and the area of the memory that stores each measurement value can be kept small, so it can be easily applied when the RAM capacity is limited. It is possible. Further, for abnormalities that occur continuously, immediate measures are required, and although the memory items are limited, inspections and restorations can be performed quickly.

Incidentally, as for each detecting device, a device other than those described in the present invention, for example, a motor voltage detecting device or an outside air temperature detecting device may be added.

[0051]

As described above, the storage device of the air conditioner of the present invention is provided with a suction pressure detection device for detecting the suction pressure of the compressor, a suction temperature detection device for detecting the suction temperature of the compressor, and a compression device. A discharge pressure detection device for detecting the discharge pressure of the compressor, a discharge temperature detection device for detecting the discharge temperature of the compressor,
A motor current detection device that detects the current of the compressor motor, and a DC bus voltage detection device that detects the DC bus voltage,
A radiator temperature detecting device for detecting the radiator temperature of the power converter, an output value of the suction pressure detecting device, an output value of the suction temperature detecting device, an output value of the discharge pressure detecting device, and an output value of the discharge temperature detecting device. Output value, output value of the motor current detection device,
In addition to inputting the output value of the DC bus voltage detecting device and the output value of the radiator temperature detecting device to the inverter control device A and using them for various controls, a storage device A for accumulating the information is provided, so that any abnormal state is detected. When it occurs, the abnormal name,
It can be used by reading out the data that accumulated the operation mode and each measurement information, and by reading out and analyzing this information at the time of repair and investigation of the cause, by knowing the surrounding situation where the abnormality occurred, It is possible to quickly investigate the cause of the abnormality and recover it. In addition, since the present invention does not have a special storage device that retains the memory even when the power is cut off, the memory is erased when the power is cut off, but it can be applied at low cost by storing it in a general RAM. It is easy and you can obtain data that can be used as clues for repair and investigation.

Further, the suction pressure detecting device for detecting the suction pressure of the compressor, the suction temperature detecting device for detecting the suction temperature of the compressor, the discharge pressure detecting device for detecting the discharge pressure of the compressor, and the compressor Discharge temperature detector for detecting discharge temperature, motor current detector for detecting current flowing in compressor motor, DC bus voltage detector for detecting DC bus voltage, and radiator temperature of power converter A radiator temperature detection device, an output value of the suction pressure detection device, an output value of the suction temperature detection device, an output value of the discharge pressure detection device,
The output value of the discharge temperature detection, the output value of the motor current detection device, the output value of the DC bus voltage detection device and the output value of the radiator temperature detection device are input to the inverter control device A and used for various controls. By providing the storage device A for accumulating the information, the cause of the abnormality occurrence and the restoration can be promptly read by reading the operation information stored in the storage device when the abnormality occurs. Further, since the information is stored in the EEPROM that retains the memory even when the power is cut off, there is an advantage that the information is not erased even when the power is cut off.

Further, the suction pressure detecting device for detecting the suction pressure of the compressor, the suction temperature detecting device for detecting the suction temperature of the compressor, the discharge pressure detecting device for detecting the discharge pressure of the compressor, and the compressor Discharge temperature detector for detecting discharge temperature, motor current detector for detecting current flowing in compressor motor, DC bus voltage detector for detecting DC bus voltage, and radiator temperature of power converter A radiator temperature detection device, an output value of the suction pressure detection device, an output value of the suction temperature detection device, an output value of the discharge pressure detection device,
The output value of the discharge temperature detection device, the output value of the motor current detection device, the output value of the DC bus voltage detection device and the output value of the radiator temperature detection device are input to the inverter control device B,
In addition to being used for various controls, by including a storage device C that stores the information, when an abnormality occurs in the inverter, the power is not shut off, when an abnormality occurs, if there is a previous abnormality, By comparing the anomaly names of, and if they are different, the previous anomaly data is deleted, and in the case of the same, by accumulating the data between the time when the anomaly occurs and the time before the specified time in the storage area, By picking up frequently occurring abnormalities that occur consecutively,
Since a general RAM is used and the area of the memory for accumulating each measurement value can be reduced, it can be easily applied when the capacity of the RAM is limited.
In addition, for abnormalities that occur continuously, immediate action is required, and the storage items are limited,
Inspection and restoration can be performed quickly.

[Brief description of drawings]

FIG. 1 is a block diagram of a storage device of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a flow chart of the same data accumulation

FIG. 3 is a block diagram of a storage device of an air conditioner according to a second embodiment of the present invention.

FIG. 4 is a flow chart of data accumulation.

FIG. 5 is a block diagram of a storage device of an air conditioner according to a third embodiment of the present invention.

FIG. 6 is a flowchart of information storage of the same.

FIG. 7 is a block diagram of a conventional air conditioner.

[Explanation of symbols]

 1 Compressor 12 Suction Pressure Detection Device 13 Suction Temperature Detection Device 14 Discharge Pressure Detection Device 15 Discharge Temperature Detection Device 16 Motor Current Detection Device 17 DC Bus Voltage Detection Device 18 Radiator Temperature Detection Device 19 Power Converter 20 Inverter Control Device A 21 Storage device A 22 Storage device B 23 Inverter control device B 24 Storage device C

Claims (3)

[Claims] 1. A suction pressure detection device for detecting a suction pressure of a compressor, a suction temperature detection device for detecting a suction temperature of the compressor, a discharge pressure detection device for detecting a discharge pressure of the compressor, and Discharge temperature detection device for detecting the discharge temperature of the compressor, motor current detection device for detecting the current flowing in the compressor motor, DC bus voltage detection device for detecting the DC bus voltage, radiator of the power converter A radiator temperature detecting device for detecting a temperature, an output signal of the suction pressure detecting device, an output signal of the suction temperature detecting device, an output signal of the discharge pressure detecting device, and an output signal of the discharge temperature detecting device. An inverter control device A that performs various controls using the output signal of the motor current detection device, the output signal of the DC bus voltage detection device, and the output signal of the radiator temperature detection device; The output signal of the suction pressure detection device, the output signal of the suction temperature detection device, the output signal of the discharge pressure detection device, and the output signal of the discharge temperature detection device, which are input to the inverter control device A, The storage device A receives the output signal of the motor current detection device, the output signal of the DC bus voltage detection device, and the output signal of the radiator temperature detection device from the inverter control device A, and stores the obtained data. Air conditioner storage device. 2. A suction pressure detecting device for detecting a suction pressure of a compressor, a suction temperature detecting device for detecting a suction temperature of the compressor, a discharge pressure detecting device for detecting a discharge pressure of the compressor, Discharge temperature detection device for detecting the discharge temperature of the compressor, motor current detection device for detecting the current flowing in the compressor motor, DC bus voltage detection device for detecting the DC bus voltage, radiator of the power converter A radiator temperature detecting device for detecting a temperature, an output signal of the suction pressure detecting device, an output signal of the suction temperature detecting device, an output signal of the discharge pressure detecting device, and an output signal of the discharge temperature detecting device. An inverter control device A that performs various controls using the output signal of the motor current detection device, the output signal of the DC bus voltage detection device, and the output signal of the radiator temperature detection device; The output signal of the suction pressure detection device, the output signal of the suction temperature detection device, the output signal of the discharge pressure detection device, and the output signal of the discharge temperature detection device, which are input to the inverter control device A, The output signal of the motor current detection device, the output signal of the DC bus voltage detection device, and the output signal of the radiator temperature detection device are received from the inverter control device A, and the obtained data is retained even when the power is cut off. A storage device of an air conditioner including a storage device B that is stored in the storage device A. 3. A suction pressure detecting device for detecting a suction pressure of a compressor, a suction temperature detecting device for detecting a suction temperature of the compressor, a discharge pressure detecting device for detecting a discharge pressure of the compressor, Discharge temperature detection device for detecting the discharge temperature of the compressor, motor current detection device for detecting the current flowing in the compressor motor, DC bus voltage detection device for detecting the DC bus voltage, radiator of the power converter A radiator temperature detecting device for detecting a temperature, an output signal of the suction pressure detecting device, an output signal of the suction temperature detecting device, an output signal of the discharge pressure detecting device, and an output signal of the discharge temperature detecting device. An inverter control device B that performs various controls using the output signal of the motor current detection device, the output signal of the DC bus voltage detection device, and the output signal of the radiator temperature detection device; The output signal of the suction pressure detection device, the output signal of the suction temperature detection device, the output signal of the discharge pressure detection device, and the output signal of the discharge temperature detection device, which are input to the inverter control device B, An output signal of the motor current detection device, an output signal of the DC bus voltage detection device, and an output signal of the radiator temperature detection device are received from an inverter control device, accumulated, and only an abnormal situation that occurs continuously is stored. A storage device of an air conditioner having a storage device C.