JPH0771803A - Operating state monitor of air conditioner - Google Patents

Abstract

PURPOSE:To strengthen counter measures for abnormal operating conditions, extend the lifetime of equipment and reduce the power consumption by detecting and informing various kinds of abnormal operating conditions of air conditioners in advance. CONSTITUTION:Two or more local controllers (6) receive operating data from two or more air conditioners (1) and send them to a host controller (7). The two or more air conditioners (1) each have two or more operating condition detectors (Th4, P1, 13, etc.) to detect two or more operating condition values, and two or more state judging devices which distinguish signs of abnormal operating conditions according to the operating condition values detected, and output advance signals. In addition, abnormal operating condition predicting devices are provided to predict abnormal operating conditions of the air conditioners and output abnormal operating condition predicting signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condition monitoring device for an air conditioner, and more particularly to an abnormality predicting function.

[0002]

2. Description of the Related Art Conventionally, as a state monitoring device for an air conditioner, Japanese Patent Application Laid-Open Nos. 2-195164 and 2-1 have been used.
As disclosed in Japanese Patent Publication No. 95165, in an air conditioner having a compressor, a condenser, an expansion valve, and an evaporator, the degree of superheat of the refrigerant in the evaporator is equal to or lower than a predetermined temperature, and the discharge gas temperature of the compressor. When the temperature difference between the refrigerant temperature of the condenser and the condenser temperature is less than or equal to a predetermined temperature, a liquid bag alarm signal is output, while the temperature difference between the refrigerant temperature of the condenser and the outside air temperature is equal to or higher than a predetermined temperature, and in the condenser. When the degree of supercooling of the refrigerant is equal to or higher than a predetermined temperature, a warning signal of refrigerant overfilling is output to notify the abnormality.

[0003]

In the above condition monitoring device for the air conditioner, when an abnormal operating condition occurs,
Since the abnormality is simply detected and notified, it is necessary to take immediate measures against the abnormality when the alarm signal is output. However, in this case, since an alarm signal is not output until an abnormality occurs, there is a problem that a quick response cannot be taken. In other words, there is a problem in that no measures are taken unless abnormal operation is performed because the abnormality is not detected in advance. In addition, until the abnormality occurs, the optimum operation is not maintained, the load on the equipment such as the compressor is increased, the life of the equipment is shortened, and the power consumption is increased. there were.

The present invention has been made in view of the above-mentioned problems, and by detecting and notifying various abnormalities of an air conditioner in advance, the abnormal measures can be strengthened and the life of the devices can be extended and The purpose is to reduce power consumption.

[0005]

In order to achieve the above object, the means taken by the present invention is such that an abnormality is predicted by a preliminary signal based on the operating state of an air conditioner. Specifically, as shown in FIG. 1, the means taken by the invention according to claim 1 is as follows. First, a compressor (21) and a heat source side heat exchanger (2
4), an expansion mechanism (25, 32) and a heat exchanger (31) on the use side, and an air conditioner (1), and a plurality of operating state values in the air conditioner (1) are detected to detect each operating state value. A plurality of state detecting means (Th4, P1, 13, ...) For outputting a state signal are provided. Further, when each operating state value becomes a monitoring value set in advance corresponding to each operating state value in response to the state signal of the state detecting means (Th4, P1, 13, ...), it is based on each operating state value. A plurality of state discrimination means (63,
71,…) are provided. In addition, each state determination means
When (63, 71, ...) Outputs a preliminary signal, abnormality prediction means (73) is provided for predicting an abnormality of the air conditioner (1) based on the preliminary signal and outputting an abnormality prediction signal (73). .

The means taken by the invention according to claim 2 is as follows. First, the compressor (21), the heat source side heat exchanger (24), and the expansion mechanism.
(25, 32) and multiple heat exchangers (31) on the use side
(1, 1, ...), a controller (7) for receiving operation data of each air conditioner (1,1, ...), and a plurality of operation state values of each air conditioner (1) are detected to detect each A plurality of state detecting means (Th4, P1, 13, ...) Which outputs the state signal of the operating state value to the controller (7) as operating data is provided. Further, the controller (7) receives the status signal of the status detection means (Th4, P1, 13, ...) And changes each operating state value to a preset monitoring value corresponding to each operating state value. In this case, a plurality of state determining means (63, 71, ...) For determining a sign of abnormality based on each operating state value and outputting a preliminary signal is provided. In addition, when each of the state determination means (63, 71, ...) Outputs a preliminary signal to the controller (7), an abnormality prediction signal is obtained by predicting an abnormality of the air conditioner (1) based on the preliminary signal. Is provided with an abnormality predicting means (73) for outputting. The means taken by the invention according to claim 3 is
First, the compressor (21), the heat source side heat exchanger (24), the expansion mechanism (25,
32) and a plurality of air conditioners (1,
,) And a plurality of local controllers (6,6, ...) Receiving operation data of the respective air conditioners (1,1, ...). And the plurality of local controllers
The host controller (7) that receives the operation data of each of the above air conditioners (1, 1, ...) from (6, 6, ...) and each of the above air conditioners (1)
And a plurality of state detecting means (Th4, P1, 13, ...) Which detect a plurality of operating state values in and output a state signal of each operating state value as operating data to the local controller (6). Furthermore, the local controller (6, 6, ...
) And the host controller (7) include the above state detection means.
(Th4, P1,13, ...) When receiving the status signal of (Th4, P1,13, ...), each operating state value becomes a monitoring value set in advance corresponding to each operating state value, and a sign of abnormality based on each operating state value is determined. Are provided with a plurality of state determining means (63, 71, ...). In addition, when each of the state determination means (63, 71, ...) Outputs a preliminary signal to the host controller (7), the abnormality prediction of the air conditioner (1) is predicted based on the preliminary signal. An abnormality prediction means (73) for outputting a signal is provided.

Further, the means taken by the invention according to claim 4 is that in the invention according to claim 3, the local controller (6) is a specific operating state value of the air conditioner (1) within a predetermined time. The representative file (6a) that stores the representative value of the operating state value in the ) And the air conditioner
An integration file (6c) that stores the integrated value of the operating time of the air conditioning control within the specified time in the specific operating state value in (1), and a specific operating status value in the air conditioner (1) for the specific time It is provided with a number file (6d) for storing the number of times of air conditioning control in the
) From the operation data received in real time from each file (6a ~ 6d) data processing means (65) to write the operation data corresponding to the code of each file (6a ~ 6d) and each of the above files (6a ~ 6d) And a scheduled transmission means (66) for transmitting the operation data stored in the host controller (7) every preset time. The means taken by the invention according to claim 5 stores the abnormality prediction data corresponding to the preliminary signal of the state judging means (63) in addition to the files (6a to 6d) in the invention according to claim 4 above. The configuration is provided with the abnormality prediction file (6e).

The means taken by the invention according to claim 6 is the invention according to any one of claims 1 to 5,
A plurality of state determination means (63, 71, ...)
4, P1,13, ...) Real discriminating means (63) that outputs a standby signal when the instantaneous operating state value reaches a monitored value
And a trend discriminating means (7) that outputs a preliminary signal when the operating state value indicating the operating state tendency within a predetermined time reaches a monitoring value in response to the state signal of the state detecting means (Th4, P1, 13, ...).
It is composed of 1) and. In addition to the real discriminating means (63) and the trend discriminating means (71) in the invention according to claim 6, the means taken by the invention according to claim 7 is
Control discriminating means (72) is provided for receiving a status signal from the status detecting means (Th4, P1, 13, ...) And outputting a preliminary signal when the operating status value of the air conditioning control within a predetermined time reaches a monitoring value. . Further, the means taken by the invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the abnormality predicting means (73) is a spare of the all state judging means (63, 71, ...). Equipped with a logical product function that outputs an abnormality prediction signal when receiving a signal,
Further, the means implemented by the invention according to claim 9 is such that the abnormality predicting means (73) outputs an abnormality predicting signal when receiving any of the preliminary signals of the respective state determining means (63, 71, ...). According to the means provided by the invention according to claim 10, the state determining means (63, 71, ...) Has a second monitoring value and a second monitoring value which is stricter than the first monitoring value. And a monitoring value, and is configured to output a first preliminary signal when the operating state value reaches the first monitoring value and a second preliminary signal when the operating state value reaches the second monitoring value, while the abnormality predicting means is provided. (73) is the all state determination means (63,
71, ...), a logical AND function for outputting an abnormality prediction signal when the first preliminary signal is received, and an abnormality prediction signal is output when any one of the second preliminary signals of the state judging means (63, 71, ...) Is received. It is configured to have a logical sum function.

Further, the means taken by the invention according to claim 11 is the invention according to any one of claims 3 to 5,
The state discriminating means (63) of the local controller (6, 6, ...) Is constituted by a real discriminating means (63), and the means taken by the invention according to claim 12 is any of the above-mentioned claims 3 to 5. In the invention described in 1, the air conditioner (1,1, ...) And the local controller (6,6, ...) Are dedicated lines (52), and the local controller (6,6, ...) And the host controller (7) Is a telephone line
The connection is made in (53).

The means taken by the invention according to claim 13 is the invention according to claim 6 or 7, wherein the trend judging means (71) is a specific operating state value in the air conditioner (1). It is configured to output a preliminary signal when the representative value of the operating state value within a predetermined time becomes a monitoring value, and
The means taken by the invention according to claim 14 is the trend determination means.
(71) is configured to output a preliminary signal when a specific operating state value of the air conditioner (1) and the maximum and minimum operating state values within a predetermined time become monitoring values, and
The means taken by the invention according to 15 is trend discrimination means (71)
Is a specific operating state value of the air conditioner (1), and when the representative value of the operating state values within a predetermined time reaches the monitored value, a standby signal is output and the specific operating state value of the air conditioner (1) Therefore, a preliminary signal is output when the maximum and minimum values of the operating state values within a predetermined time become monitoring values. Further, the means taken by the invention according to claim 16 is the invention according to any one of the above-mentioned claims 1 to 10, wherein the abnormality predicting means (73) is each state determining means (63, 71, ...).
Outputting a gas shortage prediction signal by predicting a refrigerant shortage based on the preliminary signal of, and the means taken by the invention according to claim 17,
The abnormality predicting means (73) predicts the dirt on the use side heat exchanger (31) or the filter dirt on the use side heat exchanger (31) based on the preliminary signal of each state judging means (63, 71, ...). The dirt prediction signal is output.

[0011]

With the above construction, in the invention according to claim 1,
The air conditioner (1) is performing an air conditioning operation such as cooling operation, and a plurality of operation status values in this air conditioner (1) are detected by a plurality of operation detection means, for example, low pressure and outside air temperature are detected. To output a status signal. Specifically, the invention according to claim 2 outputs to one controller (7), and the invention according to claim 3 outputs to the local controller (6, 6, ...), and the invention according to claim 12 Then, it is transmitted to the local controller (6, 6, ...) Through the dedicated line (52). When the status determination means (63, 71, ...) Receives the status signal of the status detection means (Th4, P1, 13, ...), the operating status value is compared with the monitoring value, and when the operating status value becomes the monitoring value. It discriminates the sign of abnormality and outputs a preliminary signal. Then, the abnormality prediction means (73) receives the preliminary signal, predicts the abnormality, and outputs the abnormality prediction signal. For example, in the invention according to claim 2, the abnormality prediction means (73) provided in the controller (7) and in the invention according to claim 3 the abnormality prediction means (73) provided in the host controller (7) In the invention according to claim 12, the host controller (7) receives the standby signal via the telephone line (53) and the abnormality prediction means (73) outputs the abnormality prediction signal.

Further, in the invention according to claim 4, in the local controller (6, 6, ...), the data processing means (65) from the operation data of each air conditioner (1) uses the representative value of the operation state value as a representative file. In (6a), set the maximum and minimum values to the maximum and minimum file (6
In b), the integrated value of the operating time of air conditioning control is added to the integrated file (6c).
In the invention according to claim 5, in addition to each of the files (6a to 6d) in the invention according to claim 4, the condition determining means is stored.
The abnormality prediction data is stored in the abnormality prediction file (6e) based on the preliminary signal of (63, 71, ...). And each file
Each data stored in (6a to 6e) is sent by the regular transmission means (66).
Is transmitted to the host controller (7) every predetermined time, for example, every one day. Further, in the invention according to claim 6, when the instantaneous driving state value becomes the monitoring value, the real discrimination means
The trend discriminating means (71) outputs a preliminary signal when the operating state value indicating the tendency of the operating state becomes a monitoring value while the (63) outputs the preliminary signal, and in the invention according to claim 7, the real discrimination is made. In addition to the means (63) and the trend discriminating means (71), the control discriminating means (72) when the operating state value of the air conditioning control reaches the monitoring value.
Outputs a preliminary signal, and in the invention according to claim 11,
The real discriminating means (63) is a local controller (6, 6, ...).
Will output a spare signal from the host controller (7). In the invention according to claim 8, an abnormality predicting means
(73) is abnormal when receiving the preliminary signals of all state judging means (63, 71, ...), for example, all the preliminary signals of the real judging means (63), the trend judging means (71) and the control judging means (72). In the invention according to claim 9, the abnormality determining means outputs the abnormality predicting signal when receiving the preliminary signal of any of the state determining means (63, 71, ...), and In the invention according to claim 10, each state determination means (63, 71, ...) Has a first monitoring value and a second monitoring value having a monitoring condition that is stricter than the first monitoring value. Outputs a first preliminary signal when the first monitoring value is reached, and outputs a second preliminary signal when the operating state value reaches the second monitoring value, and the abnormality prediction means (73) is used by the all-state determination means (63, 71, ...
When the second preliminary signal of any one of the state determining means (63, 71, ...) Is received, the abnormal prediction signal is output.

Further, in the invention according to claim 13, the trend discriminating means (71) is such that when the representative operating value of the air conditioner (1), which is a specific operating state value within a predetermined time, becomes a monitoring value. In the invention according to claim 14, the trend discriminating means (71) monitors the maximum and minimum operating state values within a predetermined time, which are specific operating state values in the air conditioner (1). When the value is reached, a preliminary signal is output, and in the invention according to claim 15, the trend discrimination means (71)
Is a specific operating state value for the air conditioner (1) and outputs a standby signal when the representative value of the operating state values within a predetermined time reaches the monitored value, and Then, when the maximum and minimum values of the operating state values within the predetermined time reach the monitoring values, the preliminary signal is output. Further, in the invention according to claim 16, abnormality prediction means (73)
Is to output a gas shortage prediction signal by predicting a refrigerant shortage based on a preliminary signal of each state determination means (63, 71, ...), and in the invention according to claim 17, the abnormality prediction means (73) is Based on the preliminary signal from each state discriminating means (63, 71, ...), the heat exchanger (3
The fouling of 1) or the fouling of the filter in the heat exchanger (31) on the utilization side is predicted, and a fouling prediction signal is output to predict the lack of the refrigerant and the fouling of the filter.

[0014]

Therefore, according to the invention of claim 1,
Since the sign of an abnormality is identified from the operating state value of the air conditioner (1) and the abnormality is predicted, the cause of the abnormality can be removed before the abnormality occurs, so measures can be taken very quickly. The maintenance service can be strengthened. Furthermore, since it is possible to predict an abnormality and ensure an optimal operating state, it is possible to reduce the load on the equipment such as the compressor (21) and to extend the life of the equipment, It is possible to prevent wasteful power consumption. Further, according to the invention of claim 2, since the operation data of the plurality of air conditioners (1, 1, ...) Is transmitted to one controller (7), the plurality of air conditioners (1, 1 ,. …) Can be monitored collectively. According to the invention of claim 3, operation data from a plurality of air conditioners (1, 1, ...) Is transmitted to the host controller (7) via the local controllers (6, 6, ...). In addition, since it is possible to perform simple abnormality prediction in the local controller (6, 6, ...), the processing load on the host controller (7) can be reduced and the host controller (7) can be reduced. In, it is possible to monitor a large number of air conditioners (1, 1, ...) Collectively, and it is possible for a specialized service person to respond promptly. According to the invention of claim 4, the local controller (6, 6, ...) Stores the representative value of the operating state value in the representative file (6a) and the like and stores the host controller (7) at predetermined time intervals. ), The operation data from each air conditioner (1, 1, ...) can be compressed, so the local controller (6, 6, ...) can be compressed.
) To the host controller (7) can be easily performed. Further, according to the invention of claim 5, since the abnormality prediction file (6e) for storing the abnormality prediction data is provided, it is possible to reduce the types of abnormality prediction to be predicted in the host controller (7). It is possible to reduce the abnormality prediction processing of the host controller (7).

Further, according to the invention of claim 6, the real discriminating means (63) for discriminating the instantaneous operating state and the trend discriminating means (71) for discriminating the tendency of the operating state are provided. In addition, it is possible to determine a transient state change, and at the same time, it is possible to quickly respond to an abnormality that gradually deteriorates. Further, according to the invention of claim 7, in addition to the real discriminating means (63) and the trend discriminating means (71), the control discriminating means (72) for discriminating the air conditioning control is provided. The sign of abnormality can be discriminated from the above, and the prediction accuracy can be improved. According to the invention of claim 8, the abnormality prediction signal is output based on the preliminary signal of the all-state determination means (63, 71, ...), and therefore the highly accurate abnormality prediction is performed. Therefore, the reliability of maintenance service and the like can be improved. In addition, claim 9
According to the invention of claim 1, since the abnormality prediction signal is output based on any one of the preliminary signals of all state determination means (63, 71, ...), rapid abnormality prediction can be performed. The reliability of maintenance services can be improved. Further, according to the invention of claim 10, the abnormality predicting signal is output based on the preliminary signal of the all-state determining means (63, 71, ...), and at the same time, any of the all-state determining means (63, 71 ,. It is possible to perform highly accurate abnormality prediction while outputting an abnormality prediction signal based on the preliminary signal.
Since rapid abnormality prediction can be performed, reliability of maintenance service can be improved. In particular, since two types of preliminary signals are output based on two types of monitoring values, it is possible to quickly respond to urgent predictions.

Further, according to the invention of claim 11, the real discriminating means (63) is provided in the local controller (6, 6, ...), and therefore the preliminary signal of the real discriminating means (63) is provided. Can be immediately transmitted to the host controller (7), and the abnormality prediction data can be stored in the abnormality prediction file (6e), so that the speed of abnormality prediction can be improved. According to the invention of claim 12, the local controller (6, 6, ...), and the host controller
By communicating with (7) via the telephone line (53), it is possible to easily transmit data, while by compressing the data as claimed in claims 4 and 5, communication is facilitated. It is possible to improve the sex. Further, according to the invention of claim 13, since the trend judging means (71) uses the representative value of the driving condition value, it judges the sign of abnormality from the driving condition at the time of stable operation. Therefore, it is possible to perform accurate abnormality prediction determination. Further, according to the invention of claim 14, since the trend judging means (71) uses the maximum and minimum values of the operating state values, it is possible to easily judge the sign of abnormality, so It is possible to make various abnormal prediction determinations. According to the invention of claim 15, the trend discriminating means (71) uses the representative value and the maximum / minimum value of the operating state value, and therefore, there is a sign of abnormality from the operating state at the time of stable operation. Since it is possible to easily determine the sign of abnormality at the same time when the determination is made, it is possible to reliably and accurately perform the abnormality prediction determination. Further, according to the invention of claim 16, since the abnormality predicting means (73) predicts the shortage of the refrigerant, it is possible to prevent the low-efficiency operation due to the shortage of the refrigerant. Can be securely held. Further, according to the invention of claim 17, the abnormality predicting means (73) is adapted to predict the filter dirt and the like,
Since it is possible to prevent low-efficiency operation due to clogging of the filter or the like, it is possible to reliably maintain a comfortable air-conditioning state.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 shows a refrigerant piping system of an air conditioner (1) according to the present invention, wherein the air conditioner (1) is a single outdoor unit.
The indoor unit (3, 3, ...) Is connected to (2) to form a multi-type. The outdoor unit (2) has a compressor (21) whose operating capacity is adjusted by an inverter (2a) whose output frequency is variably switched at intervals of 4 to 10 Hz within a range of 30 to 116 Hz, and the compressor (21). The oil separator (22) that separates the oil in the gas refrigerant discharged from, the four-way switching valve (23) that switches as shown by the solid line in the figure during cooling operation, and the dashed line in the figure during heating operation, and the cooling An outdoor fan (2F) attached to the outdoor heat exchanger (24) and the outdoor heat exchanger (24), which is a heat source side heat exchanger that serves as a condenser during operation and serves as an evaporator during heating operation, and during heating operation An outdoor electric expansion valve (25) that is an expansion mechanism that performs a refrigerant expansion action, a receiver (26) that stores liquefied refrigerant, and an accumulator (27) are built-in as main devices, and the compressor (21 ) And an outdoor heat exchanger (2
Each device such as 4) is connected to a refrigerant pipe (4) so that the refrigerant can flow. In addition, each indoor unit (3) above
An indoor heat exchanger (31) having the same structure, which is an evaporator during the cooling operation and a condenser during the heating operation, which is a utilization side heat exchanger, and an indoor fan attached to the indoor heat exchanger (31) ( 3F), the liquid pipe side of the refrigerant pipe (4) connected to the indoor heat exchanger (31), the refrigerant flow rate is adjusted during heating operation,
An indoor electric expansion valve (32), which is an expansion mechanism that performs a throttle action of the refrigerant during the cooling operation, is provided. The outdoor unit (2) and the indoor unit (3) are connected by a connecting pipe (41) which is a refrigerant pipe (4), and the compressor (21), the outdoor heat exchanger (24) and the indoor heat exchanger are connected. Each device such as the container (31) is connected to the closed circuit by the refrigerant pipe (4), and the main refrigerant circuit (11) configured to release the heat obtained by heat exchange with the outdoor air to the indoor air is configured. Has been done.

Further, (42) is a bypass path for heating overload control that bypasses the outdoor heat exchanger (24), and the bypass path (42) is common with the outdoor heat exchanger (24). Auxiliary heat exchanger (4a) installed in the air passage of the
(4b) and the auxiliary opening / closing valve (4c) that opens when the pressure of the refrigerant is high are sequentially connected in series and in parallel to the outdoor heat exchanger (24). Then, the heating overload control bypass passage (4
In 2), the auxiliary on-off valve (4c) is turned on and opened at all times during cooling operation and during high-pressure overheating during heating operation, and a part of the discharged gas is overheated from the main refrigerant circuit (11). Bypassing to the load control bypass passage (42), a part of the discharge gas is condensed by the auxiliary heat exchanger (4a). (43)
Is a liquid injection bypass passage for injecting liquid refrigerant into the suction side of the compressor (21) during cooling and heating operation to adjust the superheat of the suction gas, and when the temperature of the discharge pipe of the compressor (21) rises excessively. The injection valve (4d) to be opened and the capillary tube (4e) are interposed. (44) is an oil return pipe for returning the lubricating oil from the oil separator (22) to the compressor (21) through the capillary tube (4f). (45) is
Compressor (21) discharge side refrigerant pipe (4) and suction side refrigerant pipe (4)
This is a pressure equalizing hot gas bypass line that connects to and through a pressure equalizing valve (4g) and a capillary tube (4h) that open for a certain period of time before the compressor (21) is stopped due to a thermo-off state or before restarting. It is set up. (46) is the receiver (26)
Is a pressure equalizing passage connected between the pressure equalizing hot gas bypass passage (45) and one end of the equalizing hot gas bypass passage (45) at the upper end surface of the receiver (26). It is connected to the upstream side of the pressure valve (4g). This pressure equalization path (46) is connected to the receiver (26).
From the pressure equalizing hot gas bypass passage (45) is provided with a non-return valve (4i) that allows only the flow of refrigerant, and the pressure equalizing valve (4g) is opened, the upper layer of the receiver (26) The gas refrigerant can be introduced into the pressure equalizing hot gas bypass passage (45), that is, the suction side of the compressor (21) without introducing the liquid refrigerant. Further, (2b) cools the suction refrigerant by heat exchange between the suction refrigerant on the suction side of the compressor (21) and the liquid refrigerant in the liquid pipe of the refrigerant pipe (4), and the refrigerant in the communication pipe (41). Is a suction pipe heat exchanger for compensating for an increase in the degree of superheat.

Further, the air conditioner (1) is provided with many sensors, and (Th1) is a room temperature sensor for detecting an indoor temperature T1 which is the temperature of intake air in the room, (Th2) and (Th2) Th
3) is the indoor liquid temperature sensor and the indoor gas temperature sensor that detect the liquid pipe temperature T2 and the gas pipe temperature T3 in the liquid side and gas side refrigerant pipes (4) of the indoor heat exchanger (31), respectively (Th4) ,
A discharge pipe sensor for detecting the discharge pipe temperature T4 of the compressor (21),
(Th5) is an outdoor liquid temperature sensor that detects defrost and the like from the liquid refrigerant temperature T5 of the outdoor heat exchanger (24), (Th6) is a suction refrigerant pipe (2b) downstream of the suction pipe heat exchanger (2b). 4) A suction pipe sensor for detecting the suction pipe temperature T6 of the compressor (21), which is arranged in
(Th7) is an outside air temperature sensor that is arranged at the air intake port of the outdoor heat exchanger (24) to detect the outside air temperature T7 that is the intake air temperature outside the room, and (P1) is the discharge side of the compressor (21). A high pressure sensor, which is arranged in the main refrigerant circuit (11) to detect high pressure HP, (P2)
Is a low pressure sensor that is arranged on the suction side of the compressor (21) and detects the low pressure LP of the main refrigerant circuit (11), and (HPS) is the compressor (2
It is a high-pressure pressure switch for protecting the compressor (21) arranged on the discharge side of (1). The electric expansion valves (25, 32) and the sensors (Th1 to Th7, P1, P2) and the like are connected to the control unit (12) by a signal line, and the control unit (12) is connected to the sensors (Th1 ~ Th
7, P1, P2) and other detection signals are received to control the opening / closing of each electric expansion valve (25, 32) and the capacity of the compressor (21).

Further, the control unit (12) has a protection control means (13) for performing various protection controls as one of the air conditioning controls.
The protection control means (13) is provided with discharge pipe drooping control for decreasing the operating frequency of the compressor (21) when the discharge pipe temperature T4 detected by the discharge pipe sensor (Th4) becomes 110 ° C or higher. , The high pressure HP detected by the high pressure sensor (P1) is 22 kg / cm ²
When the above is reached, the high pressure droop control that lowers the operating frequency of the compressor (21) and the low pressure LP detected by the low pressure sensor (P2)
Low pressure drooping control that lowers the operating frequency of the compressor (21) when it becomes 2.5 kg / cm ² or less, and operation of the compressor (21) when the discharge pipe temperature T4 detected by the discharge pipe sensor (Th4) becomes 130 ° C or higher. When the high pressure HP detected by the high pressure sensor (P1) is 25kg / cm ² or more, the compressor (2
High voltage protection control that forcibly stops the operation of 1) and low voltage sensor
When the low pressure LP detected by (P2) becomes 0.5 kg / cm ² or less, the low pressure protection control is performed to forcibly stop the operation of the compressor (21). The protection control means (13) and various sensors (Th1 to Th7, P1, P2) in each air conditioner (1) detect a plurality of operating state values in the air conditioner (1) and output status signals for each operating state value. It constitutes a state detection means for outputting.

During the cooling operation of the air conditioner (1), the four-way switching valve (23) is switched to the solid line side in the figure, and the auxiliary opening / closing valve (4c) of the auxiliary heat exchanger (4a) is always open. The refrigerant compressed by the compressor (21) is the outdoor heat exchanger (24) and the auxiliary heat exchanger.
Condensed in (4a), through communication pipe (41), indoor unit (3)
Sent to. Then, in this indoor unit (3), the liquid refrigerant is decompressed by the indoor electric expansion valve (32), and the indoor heat exchanger (3
After evaporating in 1), through the connecting pipe (41), the outdoor unit (2)
To the compressor (21) and circulates so as to be sucked into the compressor (21). In other words, the liquid refrigerant cools the indoor air by exchanging heat with the indoor air in the indoor heat exchanger (31) and evaporating. Further, during the heating operation, the four-way switching valve (23) is switched to the side of the broken line in the figure, the flow of the refrigerant is opposite to that during the cooling operation, and the refrigerant compressed by the compressor (21) becomes the indoor heat. It is condensed in the exchanger (31), flows in the liquid state to the outdoor unit (2), is decompressed by the outdoor electric expansion valve (25), evaporates in the outdoor heat exchanger (24), and then returns to the compressor (21). To circulate. That is, the gas refrigerant heats the indoor air by exchanging heat with the indoor air in the indoor heat exchanger (31) and condensing.

FIG. 3 shows an air conditioner (1, 1, 1) which is a feature of the present invention.
...) shows a monitoring system (5) for multiple air conditioners.
Central monitoring of (1,1, ...) Air conditioners (1,1, ...)
An interface (51) is connected to the control unit (12) of the local controller (12), the interface (51) is connected to a local controller (6, 6, ...) Through a dedicated line (52), and the local controller (6, 6, ...) are connected to the host controller (7) via the telephone line (53). Up to 31 interfaces (51, 51, ...) are connected to the local controller (6, 6, ...), that is, the air conditioner (1) described above is installed in one building, for example. Since multiple units may be installed, a maximum of 31 air conditioners (1, 1,
…) Is monitored by one local controller (6), and the multiple air conditioners (1,1,…) monitored by this one local controller (6) correspond to one maintenance contractor. Will be done. Also, the above host controller
(7) includes, for example, 10,000 or more local controllers.
(6, 6 ...) Are connected and the host controller (7) is configured to centrally monitor all air conditioners (1, 1, ...).

That is, the local controller (6)
Is connected to a personal computer (54) and, as shown in FIG. 4, each air conditioner (1, 1, ...) Is connected to each air conditioner (1, 1) via an interface (51) and a dedicated line (52). , ...) is received every minute for real-time data. Specifically, for example, from the outdoor unit (2), various sensors (Th1
~ Th7, P1, P2) etc. detect outside air temperature T7, discharge pipe temperature T4,
The detection signals of the suction pipe temperature T6, the high pressure HP and the low pressure LP are set as the operation modes, and the cooling / warming / blower operation, the outdoor unit operation,
Oil return operation and defrost operation signals are drooping control, high voltage drooping control of protection control means (13), drooping signals of low pressure drooping control and discharge pipe drooping control, protection control means (13) high voltage protection Control and low voltage protection control protection signals are received, and operation signals from the indoor unit (3),
Thermo-on signal, liquid pipe temperature T2 detection signal and gas pipe temperature
In addition to receiving the detection signal of T3, it is configured to receive the sampling signal of the sampling time. In addition, the local controller (6) is provided with an abnormality occurrence detecting means (61) for detecting an abnormality occurrence from real-time data and outputting an abnormality signal, and immediately upon receiving an abnormality signal from the abnormality occurrence detecting means (61). An abnormal transmission means (62) for transmitting an abnormal signal to the host controller (7) is provided, and a real discrimination means (63), an alarm transmission means (64), a data processing means (65) and a scheduled transmission means (66). And are provided. The real discriminating means (63) is one of the state discriminating means, and is configured to output a preliminary signal regarding a lack of refrigerant and a preliminary signal regarding dirt of the indoor heat exchanger (31) and the filter. Furthermore, it has a first monitoring value and a second monitoring value that is a value that is more stringent than the first monitoring value, and the various sensors (Th1 to Th7, P
1, P2) etc., the first preliminary signals L11, L21 are sent when the instantaneous operating state value reaches the first monitoring value, and the second preliminary signals L12, L22 are sent when the operating state value reaches the second monitoring value. It is configured to output. Then, the real discrimination means (6
The standby signal of 3) is transmitted from the alarm transmitting means (64) to the host controller (7) and is input to the data processing means (65).

The data processing means (65) includes an air conditioner (1, 1,
...) from the real-time data which is the real-time operation data received from the first and second preliminary signals of the real discriminating means (63), and the representative file (6a) and the maximum / minimum file (6).
b), the integration file (6c), the number of times file (6d), and the abnormality prediction file (6e) are configured to write the operation data and the abnormality prediction data corresponding to the codes of the abnormality prediction file (6e) to each file. In other words, if the above real-time data is sent to the host controller (7) as it is, the amount of information becomes too large and the telephone line (53) is used. 7)
I am trying to send it to you. And the above representative file
(6a) is configured to store a specific operating state value of each air conditioner (1), which is a representative operating state value for one day. Specifically, for example, at least the low pressure LP Typical value, typical value of high pressure HP, and discharge pipe temperature T4
It has a data item with a representative value of. The conditions for selecting the representative values are as follows: the indoor unit (3) is thermo-on and the compressor (21) is not in the fixed frequency mode, the most indoor unit (3) is operating, and various drooping controls. Not operated, the compressor (21) is operating for 5 minutes or more, the oil return operation and the defrost operation have finished 5 minutes or more during heating operation, and the outside air temperature T7 is the maximum during cooling operation. The data processing means (65) is configured to store, as a representative value, the low pressure LP and the like when the respective conditions are satisfied in the minimum state during the heating operation or the heating operation. The measurement timing of each representative value is executed from the start of operation of the last compressor (21) in each air conditioner (1, 1, ...) Monitored by the local controller (6, 6, ...).

The maximum and minimum file (6b) is the air conditioner (1)
It is configured to store the maximum and minimum values of the operating state values for one day, which are the specific operating state values of, for example, at least the maximum value of the discharge pipe temperature T4 and the high pressure HP. It has data items of maximum value and minimum value of low pressure LP. The measurement timing of each representative value is executed from the start of operation of the last compressor (21) in each air conditioner (1, 1, ...) Monitored by the local controller (6, 6, ...). In addition, except for the above discharge pipe temperature T4, values are stored after 10 minutes have passed since the compressor (21) started operation, and when the thermostat is turned off within 10 minutes, the longest operating time Store the value of.

The integration file (6c) is configured to store a specific operation state value of the air conditioner (1) and an integrated value of the operating time of the air conditioning control in one day. For example, at least the data items of the operating time of the compressor (21), the operating time of the high pressure drooping control, the operating time of the low pressure drooping control, and the operating time of the discharge pipe drooping control are provided. The number-of-times file (6d) is configured to store a specific operating state value of the air conditioner (1) and the number of times of air-conditioning control in one day. Specifically, for example, at least high-voltage protection is performed. It has data items of the number of operations of control, the number of operations of low pressure protection control, the number of operations of discharge pipe protection control, and the number of operations of defrost operation. The above abnormality prediction file (6e) is
3) The first preliminary signals L11, L21 and the second preliminary signals L12, L
The abnormality prediction data corresponding to 22 is stored, and specifically, for example, the abnormality prediction data based on at least the first preliminary signal L11 and the second preliminary signal L12 regarding lack of gas, and the first abnormality prediction data. Each data item of abnormality prediction data based on the preliminary signal L21 and the second preliminary signal L22 is provided. Then, the scheduled transmission means (66),
The operation data and the abnormality prediction data stored in each file are transmitted to the host controller (7) at preset time intervals, for example, every day.

On the other hand, in the host controller (7),
When each operating state value reaches a preset monitoring value corresponding to each operating state value in response to the state signal of the state detecting means, a sign of abnormality based on each operating state value is discriminated and a preliminary signal is output. An abnormality predicting means that is provided with a trend determining means (71) and a control determining means (72) that are state determining means, and that predicts an abnormality of the air conditioner (1) based on the preliminary signal and outputs an abnormality prediction signal (73) is provided. The trend discriminating means (71) has a first monitoring value and a second monitoring value having a monitoring condition that is stricter than the first monitoring value, and the various sensors (Th1 to Th7, P1, P2) and the like. Each file (6
(a, 6b, 6d), the first preliminary signals T11 and T21 are output when the operating state value indicating the tendency of the operating state within a predetermined time reaches the first monitoring value, and the first preliminary signals T11 and T21 are output when the operating state value reaches the second monitoring value. It is configured to output the two preliminary signals T12 and T22. That is, the trend discriminating means (71) is 2 / under the condition that the representative value of the low pressure LP per day is less than 0.8 kg / cm ² from the representative value stored in the representative file (6a) regarding the refrigerant shortage. 2 consecutive days of α and a typical value of discharge tube temperature T4 of 120 ° C or more per day
/ Α consecutive days, or from the maximum and minimum values stored in the maximum and minimum file (6b), the low pressure LP daily minimum value is less than 0.3 kg / cm ² for 2 / α consecutive days, Moreover, when the maximum value of the discharge pipe temperature T4 per day is 132 ° C or higher, 2
/ Α consecutive days, outputs the first preliminary signal T11 or the second preliminary signal T12,
When the weight variable α = 1 and the monitoring value satisfying the above condition are satisfied, the first preliminary signal T11 indicating insufficient refrigerant is output, and when the weight variable α = 0.5 is the monitoring value satisfying the above condition, the second preliminary signal T12 indicating insufficient refrigerant is output. Will be done. Specifically, in the trend determination means (71), the typical value of the low pressure LP per day is
For two consecutive days with 0.8 kg / cm ² less than state and typical daily discharge pipe temperature T4 outputs a first preliminary signal T11 when two consecutive days in a state of more than 120 ° C., also, a low pressure Pressure LP
If the minimum value of 1 day is less than 0.3 kg / cm ² for 2 consecutive days, and the maximum value of discharge tube temperature T 4 for 1 day is 132 ° C or more for 2 consecutive days, the first preliminary signal T 11 While the low pressure LP is less than 0.8kg / cm ² for 4 consecutive days, and the discharge pipe temperature T4 is more than 120 ℃ for 4 consecutive days. In this case, the second preliminary signal T12, which is a little more urgent than the first preliminary signal T11, is output, and the minimum value of the low pressure LP per day is 0.3 kg /
It is less than cm ² for 4 consecutive days, and discharge pipe temperature T4 is 1
When the maximum value of the day is 132 ° C. or more for four consecutive days, the second preliminary signal T12, which is more urgent than the first preliminary signal T11, is output. Further, the trend determination means (71), with respect to the dirt of the indoor heat exchanger (31) and the like, the representative value stored in the representative file (6a), the maximum minimum value stored in the maximum minimum file (6b) and Count file (6d)
From the value of the number of times, during cooling operation, the low-pressure pressure LP has a typical value of 2.5 kg / cm ² or less for 2 / α consecutive days, and discharge pipe protection control occurs during 2 / α days. whether the case has been, or if the minimum value of the daily low pressure LP is continuously 2 / alpha date 2.0 kg / cm ² or less of state and the discharge pipe protection control occurs during the 2 / alpha Date Or, during heating operation, the high-pressure pressure HP has a typical value of 24kg / cm ² or more for 2 / α consecutive days, or the high-pressure pressure HP has a maximum value of 26kg / cm ² per day. In case of 2 / α consecutive days in the above state, the first preliminary signal T21 or the second preliminary signal T22 is output,
Further, when the weight variable α = 1 and the monitoring value satisfying the above condition are obtained, the first preliminary signal T21 for stain is obtained, and when the weight variable α = 0.5 is the monitoring value satisfying the above condition, the second preliminary signal T22 for stain is obtained.
Will be output. Specifically, during the cooling operation, the trend determination means (71) is configured such that the low-pressure pressure LP has a typical value of 2.5 kg / cm ² or less for 2 consecutive days and the discharge pipe protection control for 2 days. Occurs at least once during, or the minimum daily low pressure LP is 2.0 kg
/ Cm ² or less for two consecutive days, and when the discharge pipe protection control occurs at least once in two days, the first preliminary signal T21 is output, and during the heating operation, the high pressure HP For 2 consecutive days with a typical value of 24kg / cm ² or more, or the maximum value of high pressure HP per day is 26kg
The first preliminary signal T when 2 days or more are continued in the condition of / cm ² or more.
21 is output. On the other hand, the trend determination means (71) has a low pressure LP value of 2.5 per day during cooling operation.
If the discharge pipe protection control occurs at least once in 4 days under the condition of kg / cm ² or less, or if the minimum value of low pressure LP per day is 2.0 kg / cm ² The above-mentioned first preliminary signal T21 when the discharge pipe protection control is generated at least once during the four days in the following conditions for four consecutive days.
It outputs a second preliminary signal T22 that requires a little more urgency, and during heating operation, the high pressure pressure HP continues for four consecutive days with a typical value of 24 kg / cm ² or more per day, or
4 with maximum daily high pressure HP of 26 kg / cm ² or more
In the case of consecutive days, the second preliminary signal T22, which is more urgent than the first preliminary signal T21, is output.

The control discriminating means (72) has a first monitoring value and a second monitoring value having a monitoring condition stricter than the first monitoring value, and various sensors (Th1 to Th7, P1, P2), etc. Based on the operation signal of each file (6c, 6d) based on the status signal of, when the operation status value of the air conditioning control within the predetermined time reaches the first monitoring value, the first preliminary signals S11 and S21 are output, and the operation status value is the second monitoring value. Then, the second preliminary signals S12 and S22 are output. That is, the control determination means (72), regarding the shortage of the refrigerant, from the integrated value stored in the integrated file (6c), the operating time of the discharge pipe drooping control for one day is 40 / α% or more,
And if the operating time of the low-pressure droop control for one day is 40 / α% or more, or the frequency value stored in the frequency file (6d) is 1 / α times or more, the number of occurrences of discharge pipe protection control per day is
When the number of low-voltage protection control occurrences per day is 1 / α or more, the first preliminary signal S11 or the second preliminary signal S12 is output,
When the weight variable α = 1, the first preliminary signal S11 is output when the monitoring value satisfies the above condition, and when the weight variable α = 0.5, the second preliminary signal S12 is output when the monitoring value satisfies the above condition. Specifically, in the control determination means (72), the operating time of the discharge pipe drooping control for one day is 40% or more,
And, when the operating time of the low-pressure droop control of one day is 40% or more, the first preliminary signal S11 is output, and the number of discharge pipe protection control occurrences per day is one or more, and the low-voltage protection of one day. When the number of times of occurrence of control is one or more, the first preliminary signal S
While 11 is output, the operating time of the discharge pipe drooping control for one day is 80% or more, and the operating time of the low pressure drooping control for one day.
When it is 80% or more, the second preliminary signal S12, which is a little more urgent than the first preliminary signal S11, is output, and the number of discharge pipe protection control occurrences per day is two or more, and If the number of times the low voltage protection control is generated is two or more, the above first
A second preliminary signal S12 which is slightly more urgent than the preliminary signal S11
Will be output. Further, the control determination means (72)
Is the low pressure droop for one day during cooling operation based on the accumulated value stored in the accumulated file (6c) and the accumulated number stored in the number of times file (6d) regarding stains on the indoor heat exchanger (31), etc. The operation time of control is 40 / α% or more, and the number of discharge pipe protection control occurrences per day is one or more, or the number of low pressure protection control occurrences per day is 1 / α or more, And when the number of discharge pipe protection control occurrences per day is one or more, and during heating operation, the operating time of the low-pressure droop control for one day is 40 / α% or more, and the high-voltage protection control for one day. When the number of occurrences of is 1 / α times or more, the first preliminary signal S21 or the second preliminary signal S22 is output,
When the weight variable α = 1 and the monitoring value satisfying the above condition are satisfied, the first preliminary signal S21 is output, and when the weight variable α = 0.5 is the monitoring value satisfying the above condition, the second preliminary signal S22 is output. Specifically, the control determination means (72) is configured such that during the cooling operation, the operating time of the low-pressure droop control for one day is 40%.
If the number of occurrences of the discharge pipe protection control for one day is one or more, or if the number of occurrences of the low pressure protection control for one day is one or more and the occurrence of the discharge pipe protection control for one day is generated. When the number of times is 1 or more, the first preliminary signal S21 is output, and during the heating operation, the operating time of the low-pressure droop control for one day is 40% or more, and the number of times the high-voltage protection control is generated for one day. If the number of times is 1 or more, the first preliminary signal S21
Is output. On the other hand, the control determination means (72) determines whether the operation time of the low-pressure droop control per day is 80% or more and the number of discharge pipe protection control occurrences per day is one or more during the cooling operation. Alternatively, when the number of low-pressure protection control occurrences per day is two or more and the number of discharge pipe protection control occurrences per day is one or more, it is more urgent than the first preliminary signal S21. Outputs the second preliminary signal S22, and
In heating operation, if the operating time of the low-voltage droop control per day is 80% or more, and the number of high-voltage protection control occurrences per day is two or more, it is more urgent than the first preliminary signal S21. Will output the second preliminary signal S22 requiring

On the other hand, the abnormality predicting means (73) is, as shown in FIGS. 5 and 6, each of the first preliminary spare of the real judging means (63), the trend judging means (71) and the control judging means (72). Signal L11,
An AND circuit (7a) having a logical product function that outputs an abnormality prediction signal when receiving T11, S11, L21, T21, S21, each real discrimination means (63), trend discrimination means (71), and control discrimination means (72).
And any of the second preliminary signals L12, T12, S12, L22, T
22 and S22, and a first OR circuit (7b) having an OR function that outputs an abnormality prediction signal, and when the AND circuit (7a) or the first OR circuit (7b) outputs, a gas shortage prediction signal or dirt A second OR circuit (7c) that outputs a prediction signal is provided. The host controller (7) is provided with display means (74) such as a display for displaying abnormality prediction based on the gas shortage prediction signal output from the abnormality prediction means (73).

Next, the monitoring operation of the monitoring system (5) for each of the air conditioners (1, 1, ...) Will be described. First, each air conditioner
The air conditioning operation of (1, 1, ...) Is controlled by the control unit (12), and as shown in FIG.
From (12), real-time data, which is operation data including operation status values of various sensors (Th1 to Th7) and protection control means (13), which are status detection means, is interface (51) and dedicated line (52) every minute. Via each local controller (6,6,
...) has been sent. Then, each of the local controllers (6, 6, ...) Processes the real-time data, and when an abnormality such as a transmission abnormality occurs, an abnormality occurrence detecting means (6
1) detects an abnormality and outputs an abnormality signal, and the abnormality transmission means (6
2) Immediately sends an error signal to the host controller (7), and the error occurrence is displayed on the display means (74) of the host controller (7).

Further, each of the above local controllers (6, 6,
In (), the real discriminating means (63) discriminates from the real-time data an indication of a refrigerant shortage and an indication of stains on the indoor heat exchanger (31) and the filter. Therefore, the discriminating operation of the real discriminating means (63) will be described based on the control flows of FIGS. 7 and 8. First, FIG. 7 is a control flow for determining a symptom of a refrigerant shortage. When the determination routine starts, in step ST1, an operation state except for the frequency fixed mode of the compressor (21) such as oil return operation and defrost operation. Various sensors (Th2-Th4, Th6, Th7, P1, P
Calculate the average of the detection values in 2). For example, the average high pressure HP is calculated. Then, it moves to step ST2 and it is judged whether it is a cooling operation mode. If it is a cooling operation mode, it moves to step ST3 and it is judged whether the low pressure LP is below a predetermined value. That is, it is determined whether or not the low pressure LP is lower than the monitoring value obtained by multiplying the constant A by the weight variable α. If the low pressure LP is larger than the monitoring value, the process returns to step ST1. become. This step
In ST4, it is determined whether the suction pipe temperature T6 is equal to or higher than a predetermined value. That is, it is determined whether or not the intake pipe temperature T6 has risen from the monitoring value obtained by subtracting the value of the constant B multiplied by the weighting variable α from 130, and if it is less than the monitoring value, the process returns to step ST1 while the monitoring value If it rises, it will move to step ST5. In step ST5, it is determined whether the discharge pipe temperature T4 is equal to or higher than a predetermined value. That is, it is determined whether or not the discharge pipe temperature T4 has risen from the monitoring value obtained by multiplying the constant C by the weight variable α, and if it is greater than the monitoring value, the process returns to step ST1. If it falls below the monitoring value, the process proceeds to step ST6. It will be. In this step ST6, it is determined whether or not the high pressure HP is below a predetermined value. That is, the weight variable α is added to the constant D.
It is determined whether the high pressure HP is lower than the monitored value obtained by adding 10 to the monitored value. If it is larger than the monitored value, the process returns to step ST1.
I will move to 7. Then, in step ST7, if the weight variable α = 1, the first preliminary signal L11 relating to the refrigerant shortage is set, and if the weight variable α = 0.5, the first preliminary signal L11 is set slightly more than the first preliminary signal L11. The second preliminary signal L12 relating to the shortage of the refrigerant that requires urgency will be set. The preliminary signals L11 and L12 may have a possibility of clogging of the refrigerant in addition to lack of the refrigerant.

If it is not in the cooling operation mode, the process proceeds to step ST8 or step ST11, and this step ST8
, The superheat degree SH of the refrigerant in the indoor heat exchanger (31)
Is determined to be a predetermined value or more. That is, 20 to the constant E
From the monitored value obtained by subtracting the value multiplied by the weight variable α
Is increased, the process returns to step ST1 if it is smaller than the monitoring value, while if it is higher than the monitoring value, the process proceeds to step ST9. In this step ST9, it is judged whether or not the indoor electric expansion valve (32) is fully opened. If it is not fully opened, the process returns to step ST1. If it is fully opened, the process proceeds to step ST10. This step
In ST10, it is determined whether the discharge pipe temperature T4 is equal to or higher than a predetermined value. That is, it is determined whether or not the discharge pipe temperature T4 has risen from the monitoring value obtained by multiplying the constant C by the weighting variable α as in step ST5.
On the other hand, when the measured value is lower than the monitored value, the process proceeds to step ST7. Then, in step ST7,
As described above, when the weight variable α = 1, the first preliminary signal L11 is set, and when the weight variable α = 0.5, the second preliminary signal L12 is set.

In step ST11, which is not the cooling operation mode
At, it is determined whether the outside air temperature T7 is equal to or higher than a predetermined value. That is, it is determined whether or not the outside air temperature T7 has risen from the monitoring value obtained by multiplying the constant F by the weighting variable α. If the outside air temperature T7 is less than the monitoring value, the process returns to step ST1. become. This step ST12
At, it is determined whether the defrost operation is equal to or more than a predetermined value in one hour. That is, it is determined whether the number of defrosts is greater than the monitoring value (G / α) obtained by dividing the constant G by the weight variable α. If the number is less than the monitoring value, the process returns to step ST1. The process moves to step ST7 above. Then, in step ST7, as described above, the first preliminary signal L11 is set when the weight variable α = 1, and the second preliminary signal L12 is set when the weight variable α = 0.5. become.

First, FIG. 8 is a control flow for judging signs of dirt on the indoor heat exchanger (31), etc. When the judgment routine starts, in step ST21, the compressor for oil return operation and defrost operation etc. Calculate the average value of the detection values of various sensors (Th2, Th3) in the operating conditions except the frequency fixed mode of (21). For example, the average indoor liquid pipe temperature T2 is calculated. Then, the process proceeds to step ST21, it is determined whether the cooling operation mode is set, and if the cooling operation mode is set, step ST21
Moving to 23, it is determined whether the superheat degree SH of the refrigerant in the indoor heat exchanger (31) is equal to or lower than a predetermined value. That is, it is determined whether or not the superheat degree SH is lower than the monitoring value obtained by multiplying the constant H by the weight variable α, and if it is higher than the monitoring value, the process returns to step ST21, while if it is lower than the monitoring value, the process proceeds to step ST24. become. Then, in step ST24, the weight variable α
If = 1, the first preliminary signal L21 for dirt is set, and if the weight variable α = 0.5, the second preliminary signal L22 for dirt that is slightly more urgent than the first preliminary signal L21. Will be set. The preliminary signals L21 and L22 are used for the indoor fan (3
There may be a malfunction of F).

If it is not in the cooling operation mode, the process proceeds to step ST25. In this step ST25, it is determined whether the defrost operation and the oil return operation are performed. If the defrost operation is performed, the above step ST21 is performed. On the other hand, in the case of the above defrost operation etc., go to step ST
26, the subcooling degree SC of the refrigerant in the indoor heat exchanger (31)
Is below a predetermined value. That is, 10 to the constant I
From the monitored value obtained by adding the value multiplied by the weight variable α
It is determined whether SC has decreased, and if it is greater than the monitoring value, the process returns to step ST21, while if it is less than the monitoring value, the process proceeds to step ST24. Then, in step ST24, as described above, when the weight variable α = 1, the first preliminary signal L21 is set, and the weight variable α = 0.
If it is 5, the second preliminary signal L22 is set.

Further, the preliminary signals L11, L21, ... Of the real discrimination means (63) are immediately transmitted to the host controller (7) by the alarm transmission means (64) and at the same time by the data processing means (65). It will be stored in the abnormality prediction file (6e) as abnormality prediction data. On the other hand, in the local controller (6,6, ...), each air conditioner (1,1,
Since the real-time data, which is the operation data, is transmitted every 1 minute, the data processing means (65) processes the real-time data and writes the operation data in each file (6a to 6d). That is, for example, the representative file
In (6a), the representative value of the low pressure LP, the representative value of the high pressure HP, and the representative value of the discharge pipe temperature T4 in one day are written,
The maximum / minimum file (6b) contains the discharge pipe temperature T4 in one day.
The maximum value of, the maximum value of high pressure HP, and the minimum value of low pressure LP are written, and the accumulated file (6c) shows the operating time of the compressor (21) per day and the high pressure droop control. Driving time,
The operating time of the low-pressure drooping control and the operating time of the discharge pipe drooping control are written, and the number of times file (6d) has the number of high-voltage protection control operations in one day and the number of low-voltage protection control operations in one day.
The number of discharge pipe protection control operations and the number of defrost operation operations are written.

The operation data and the abnormality prediction data stored in each of the files (6a to 6e) are sent once a day by the regular transmission means (66) via the telephone line (53) to the host controller (7). Sent to.

In the host controller (7),
Trend discriminating means (71) and control discriminating means based on the operation data transmitted from the local controller (6, 6, ...).
(72) discriminates a sign of abnormality related to insufficient refrigerant and dirt. Specifically, in the trend judging means (71), regarding the lack of refrigerant, the low-pressure pressure LP is continuously less than 0.8 kg / cm ² for 2 consecutive days and the discharge pipe temperature T 4 for 1 day. The first preliminary signal T11 is output when the representative value of is over 120 ° C for two consecutive days. Further, the trend discriminating means (71) indicates that the low pressure LP is less than 0.3 kg / cm ² for two consecutive days and the maximum discharge pipe temperature T4 is less than one day for the refrigerant shortage. 2 at 132 ℃ or higher
The first preliminary signal T11 is output when there are consecutive days. Also,
The trend discriminating means (71) is a low pressure
If the typical value of LP per day is less than 0.8 kg / cm ² for 4 consecutive days and the typical value of discharge pipe temperature T 4 per day is 120 ° C or more for 4 consecutive days, the above first preliminary A second preliminary signal T12, which is a little more urgent than the signal T11, is output. Also,
The trend discriminating means (71) is a low pressure
If the minimum daily value of LP is less than 0.3 kg / cm ² for four consecutive days and the maximum value of discharge pipe temperature T4 for one day is 132 ° C or more for four consecutive days, the above first preliminary A second preliminary signal T12, which is a little more urgent than the signal T11, is output.

Further, the trend discriminating means (71) is concerned with the contamination of the indoor heat exchanger (31) and the like, in the cooling operation, when the representative value of the low pressure LP per day is 2.5 kg / cm ² or less. If the discharge pipe protection control occurs at least once in two days, or if the low pressure LP is less than 2.0 kg / cm ² per day for two consecutive days, In addition, the first preliminary signal T21 is output when the discharge pipe protection control occurs at least once within two days. The trend discriminating means (71) has a typical representative value of the high pressure HP of 24 kg / day during the heating operation regarding the contamination of the indoor heat exchanger (31).
2 days or consecutive cm ² or more states, or high pressure
When the maximum value of HP per day is 26 kg / cm ² or more for two consecutive days, the first preliminary signal T21 is output. Further, the trend determination means (71) has a typical low pressure LP of 2.5 per day during cooling operation with respect to contamination of the indoor heat exchanger (31) and the like.
If the discharge pipe protection control occurs at least once in 4 days under the condition of kg / cm ² or less, or if the minimum value of low pressure LP per day is 2.0 kg / cm ² The above-mentioned first preliminary signal T21 when the discharge pipe protection control is generated at least once during the four days in the following conditions for four consecutive days.
It outputs the second preliminary signal T22 which requires more urgency.
In addition, regarding the contamination of the indoor heat exchanger (31), whether the trend determination means (71) has a typical high pressure pressure HP of 24 kg / cm ² or more for 4 consecutive days during heating operation. Alternatively, when the maximum value of the high-pressure pressure HP for one day is 26 kg / cm ² or more for four consecutive days, the second preliminary signal T22 which is slightly more urgent than the first preliminary signal T21 is output.

On the other hand, when the operating time of the discharge pipe drooping control for one day is 40% or more and the operating time of the low pressure drooping control for one day is 40% or more, the control determining means (72) determines that the refrigerant is insufficient. And outputs the first preliminary signal S11. In addition, the control determination means (72) determines whether the discharge pipe protection control is performed more than once a day and the low pressure protection control is performed more than once a day for the refrigerant shortage. The preliminary signal S11 is output. Further, the control determination means (72), regarding the refrigerant shortage,
When the operating time of the discharge pipe drooping control of one day is 80% or more and the operating time of the low pressure drooping control of one day is 80% or more, the second preliminary signal which is a little more urgent than the above first preliminary signal S11. Outputs S12. Further, the control determining means (72) determines whether the discharge pipe protection control has occurred twice or more per day and the low pressure protection control has occurred twice or more per day with respect to the refrigerant shortage. The second preliminary signal S12, which is a little more urgent than the first preliminary signal S11, is output.

The control determining means (72) is an indoor heat exchanger.
Regarding the dirt such as (31), during the cooling operation, the operating time of the low-pressure droop control per day is 40% or more, and the number of times the discharge pipe protection control is generated per day is one or more, or The first preliminary signal S21 is output when the number of low-pressure protection control occurrences per day is one or more and the number of discharge pipe protection control occurrences per day is one or more. Further, the control determination means (72) relates to the contamination of the indoor heat exchanger (31) and the like, and during the heating operation, the operating time of the low pressure droop control for one day is 40% or more, and the high pressure protection control for the day is performed. When the number of occurrences is one or more, the first preliminary signal S21 is output. Also,
The control determining means (72) relates to the contamination of the indoor heat exchanger (31) and the like, and during the cooling operation, the operating time of the low-pressure droop control for one day is 80% or more, and the discharge pipe protection control for one day occurs. If the number of times is one or more, or if the number of low-pressure protection control occurrences per day is two or more and the number of discharge pipe protection control occurrences per day is one or more, then the above-mentioned first preliminary A second preliminary signal S22, which is a little more urgent than the signal S21, is output. Further, the control determination means (72), the indoor heat exchanger (31)
Regarding the dirt such as the above, when the operating time of the low-voltage drooping control for one day is 80% or more and the number of occurrences of the high-voltage protection control for one day is two or more times during the heating operation, the first preliminary signal S21. It outputs the second preliminary signal S22 which requires more urgency.

The abnormality predicting means (73) is provided with the first preliminary signals L11, T11, S11, L21, T21 of the real judging means (63), the trend judging means (71) and the control judging means (72). S21
When the AND circuit (7a) receives the abnormal prediction signal, the second preliminary signal L12, T12 of any one of the real judging means (63), the trend judging means (71) and the control judging means (72) is output. ，
When the first OR circuit (7b) receives S12, L22, T22, S22, it outputs an abnormality prediction signal, and when the AND circuit (7a) or the first OR circuit (7b) outputs, the second OR circuit (7c). Will output a gas shortage prediction signal or a dirt prediction signal. In addition to the lack of refrigerant, it may be clogged with refrigerant, and the indoor fan (3) as well as the dirt on the filter and the indoor heat exchanger (31).
There may be a malfunction of F). This abnormality prediction means (73)
An abnormality prediction is displayed on the display means (74) based on the gas shortage prediction signal output by the engine, etc., and based on this abnormality prediction display, the service engineer performs maintenance inspections etc. for the air conditioner (1) with a sign of abnormality. Will be done.

Therefore, according to the present embodiment, the abnormality occurrence factor is determined before the abnormality occurs by determining the abnormality sign from the operating state value of the air conditioner (1) and predicting the abnormality. Since it can be removed, it is possible to take measures very quickly and enhance the maintenance service.
Furthermore, since it is possible to predict an abnormality and ensure an optimal operating state, it is possible to reduce the load on the equipment such as the compressor (21) and to extend the life of the equipment, It is possible to prevent wasteful power consumption. Further, the operation data of a plurality of air conditioners (1, 1, ...) Is transmitted to the host controller (7) via the local controller (6, 6, ...), and the local controller (6 ,
6, ...) can perform simple abnormality prediction, etc., so that the processing load on the host controller (7) can be reduced, and at the same time, a large number of air conditioners (1, 1, ...) Can be collectively monitored, and a prompt response can be made by a professional service person. In addition, the local controller (6,
6, ...) The representative value of the operating state value is stored in the representative file (6
Store in a), etc., and host controller (7) at predetermined time intervals
In addition, since the operation data from each air conditioner (1, 1, ...) can be compressed, it can be sent from the local controller (6, 6, ...) to the host controller (7). Can be done easily. Furthermore, in addition to providing an abnormality prediction file (6e) that stores abnormality prediction data,
Since it is possible to reduce the types of error predictions that are predicted by the host controller (7), the host controller
It is possible to reduce the abnormality prediction processing of (7).

Further, as the state determining means, the real determining means (63) for determining the instantaneous operating state and the trend determining means (71) for determining the tendency of the operating state are provided. It is possible to distinguish state fluctuations and at the same time, to promptly deal with abnormalities that gradually deteriorate.
Further, since the control determining means (72) for determining the air conditioning control is provided, the sign of abnormality can be determined from the high voltage protection control and the like, and the prediction accuracy can be improved. Further, the abnormality predicting means (73) is provided with all the preliminary signals L11, T of the real judging means (63), the trend judging means (71) and the control judging means (72).
The abnormality prediction signal is output based on 11, ..., And the abnormality prediction signal is output based on any of the preliminary signals L12, T12 ,. At the same time, rapid abnormality prediction can be performed, so that reliability of maintenance service can be improved. In particular, since two types of preliminary signals L11, T11, L12, T12, ... Are output based on two types of monitoring values, it is possible to promptly deal with urgent prediction.

Further, since the real discriminating means (63) is provided in the local controller (6, 6, ...), the spare signal of the real discriminating means (63) is immediately sent to the host controller (7). The abnormality prediction data can be transmitted and stored in the abnormality prediction file (6e), and the speed of abnormality prediction can be improved. In addition, the above local controller (6, 6, ...) and host controller
(7) is communicated with the telephone line (53), the data can be easily transmitted. However, by compressing the data as described above, the communication can be facilitated. it can. Further, the trend discrimination means (71) is configured to use the representative value and the maximum / minimum value of the operating state values, so that it is possible to determine the abnormal state from the stable operating state and at the same time to display the abnormal state. Since it can be easily identified,
It is possible to reliably and accurately perform abnormality prediction determination. Further, the abnormality predicting means (73) is designed to predict a refrigerant shortage, and can prevent low-efficiency operation due to a refrigerant shortage, while predicting filter contamination and the like. Since it is possible to prevent low-efficiency operation due to filter clogging or the like, a comfortable air-conditioning state can be reliably maintained.

In this embodiment, the multi-type air conditioner (1) has been described, but in the air conditioner of the present invention, one outdoor unit (2) is connected to one indoor unit (3). It may be a pair type. In addition, in this embodiment, the local controller (6, 6, ...) Is provided, but one controller (7) corresponding to the host controller (7) is provided, and the operation data is sent by the controller (7). It is also possible to collect and collectively monitor all air conditioners (1, 1, ...). Further, in this embodiment, the local controller (6, 6,
...) has an abnormality prediction file (6e),
The preliminary signals L11 to L22 of the real discrimination means (63) may be transmitted to the host controller (7) only by the alarm transmission means (64) without providing the abnormality prediction file (6e),
On the contrary, the abnormality prediction data may be transmitted by the abnormality prediction file (6e) without providing the alarm transmission means (64). Further, in this embodiment, the real discrimination means
Although (63), the trend discriminating means (71) and the control discriminating means (72) are provided, the control discriminating means (72) does not necessarily have to be provided. That is, there is a possibility that the abnormality prediction of the air conditioner that does not have the discharge pipe drooping control may be performed. Further, in this embodiment, the abnormality prediction means (73) is provided with the AND circuit (7a) and the first OR circuit (7b).
It may be only a) or only the first OR circuit (7b). Further, in the present embodiment, the trend discriminating means (71) is configured to utilize the representative value and the maximum / minimum value of the operating state value, but only the representative value of the operating state or only the maximum / minimum value may be used. Good. Further, in this embodiment, the abnormality prediction means (7
In 3), the shortage of the refrigerant, the contamination of the filter and the like are predicted, but the malfunction of the compressor (21) and the malfunction of various valves such as the outdoor electric expansion valve (25) may be predicted.

[Brief description of drawings]

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

FIG. 2 is a refrigerant system diagram of an air conditioner.

FIG. 3 is a monitoring system diagram of an air conditioner.

FIG. 4 is a control block diagram of a local controller.

FIG. 5 is a block diagram of abnormality prediction means.

FIG. 6 is a block diagram of abnormality prediction means having different input / output signals.

FIG. 7 is a control flow chart of a real discrimination unit.

FIG. 8 is another control flow chart of the real discriminating means.

[Explanation of symbols]

 1 Air conditioner 5 Monitoring system 52 Dedicated line 53 Telephone line 6 Local controller 63 Real judgment means 65 Data processing means 66 Regular transmission means 6a Representative file 6b Maximum / minimum file 6c Accumulation file 6d Count file 6e Abnormality prediction file 7 Host controller 71 Trend judgment Means 72 Control discrimination means 73 Abnormality prediction means

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kazuto Fujita 2-4-12 Nakazaki Nishi, Kita-ku, Osaka Umeda Center Building Daikin Industries, Ltd. (72) Inventor Masazumi Tada 2-chome, Nakazaki-nishi, Kita-ku, Osaka 4-12 Umeda Center Building Daikin Industries, Ltd. (72) Inventor Takashi Kurokawa 2-4-12 Nakazaki Nishi, Kita-ku, Osaka City Umeda Center Building Daikin Industries Ltd. (72) Inventor Shoji Nakagami Osaka City Kita 2-4-12 Nakazaki-nishi, Umeda Center Building, Daikin Industries, Ltd. (72) Inventor Masashi Iwai 1304, Kanaoka-machi, Sakai City, Osaka Prefecture Daikin Industries, Ltd., Kanaoka Factory, Sakai Plant (72) Masahiro Tanaka, Osaka Prefecture 1304 Kanaoka-machi, Sakai City Daikin Industries, Ltd. Sakai Plant Kanaoka Factory

Claims (17)

[Claims] 1. An air conditioner having a compressor (21), a heat source side heat exchanger (24), an expansion mechanism (25, 32) and a use side heat exchanger (31).
(1) and a plurality of state detecting means (Th) for detecting a plurality of operating state values of the air conditioner (1) and outputting a state signal of each operating state value.
4, P1,13, ...), and the status signal of the status detecting means (Th4, P1,13, ...), and each operating status value becomes a monitoring value set in advance corresponding to each operating status value. If so, a plurality of state determination means (63, 71,
...) and each of the state determination means (63, 71, ...) outputs a preliminary signal, an abnormality prediction means for predicting an abnormality of the air conditioner (1) based on the preliminary signal and outputting an abnormality prediction signal ( 73) A condition monitoring device for an air conditioner, comprising: 2. A plurality of air conditioners (1, 1, ...) Having a compressor (21), a heat source side heat exchanger (24), an expansion mechanism (25, 32) and a use side heat exchanger (31). , A controller (7) for receiving the operation data of each of the air conditioners (1, 1, ...), and a plurality of operation state values of each of the air conditioners (1) are detected to output a state signal of each operation state value. A plurality of status detection means (Th4, P1, 13, ...) Which outputs to the controller (7) as operation data
And the controller (7) is equipped with the above state detection means (T
h4, P1,13, ...), each operating state value becomes a monitoring value set in advance corresponding to each operating state value, and a sign of abnormality based on each operating state value is determined. A plurality of state discriminating means (63, 71, ...) Which outputs preliminary signals, and the state discriminating means provided in the controller (7).
(63, 71, ...) is provided with an abnormality prediction means (73) for predicting an abnormality of the air conditioner (1) based on the preliminary signal and outputting an abnormality prediction signal based on the preliminary signal. Characteristic air conditioner condition monitoring device. 3. A plurality of air conditioners (1, 1, ...) Having a compressor (21), a heat source side heat exchanger (24), an expansion mechanism (25, 32) and a use side heat exchanger (31). , A plurality of local controllers (6,6, ...) Receiving operation data of the air conditioners (1,1, ...), and the air conditioners (6,6, ...) From the plurality of local controllers (6,6, ...). (1, 1, ...), the host controller (7) that receives the operation data, and the local controller (7) that detects the operation status values of each air conditioner (1) and uses the status signal of each operation status value as the operation data. 6) output to multiple state detection means (Th4, P1,
13, ...), and the local controller (6,6, ...), and the host controller (7), and the state detection means (Th4, P1,13,
Receiving a status signal of ...), when each operating state value reaches a preset monitoring value corresponding to each operating state value, a plurality of signals that determine a sign of abnormality based on each operating state value and output a preliminary signal are output. , And the host controller (7). When each of the state determining means (63, 71, ...) Outputs a preliminary signal, the air conditioner is based on the preliminary signal. A condition monitoring device for an air conditioner, comprising: an abnormality prediction means (73) for predicting the abnormality of (1) and outputting an abnormality prediction signal. 4. The state monitoring device for an air conditioner according to claim 3, wherein the local controller (6) is a specific operating state value of the air conditioner (1) and is a representative value of operating state values within a predetermined time. The representative file (6a) that stores the data, the maximum and minimum file (6b) that stores the maximum and minimum values of the operating status values for a specific operating condition of the air conditioner (1) within a predetermined time, and the air conditioning (1 (6c) that stores the integrated value of the operating time of the air conditioning control within the specified time, and the specific operating state value of the air conditioner (1) within the specified time Number of times file to store the number of times of air conditioning control
(6d) Data that writes to each file the operation data of the operation status value corresponding to the code of each file (6a to 6d) from the operation data received from the air conditioner (1, 1, ...) in real time A processing means (65) and a regular transmission means (66) for transmitting the operation data stored in each of the files (6a to 6d) to the host controller (7) at preset time intervals. Characteristic air conditioner condition monitoring device. 5. The condition monitoring device for an air conditioner according to claim 3, wherein the local controller (6) is a specific operating state value of the air conditioner (1) and is a representative value of operating state values within a predetermined time. The representative file (6a) that stores the data, the maximum and minimum file (6b) that stores the maximum and minimum values of the operating status values for a specific operating condition of the air conditioner (1) within a predetermined time, (6c) that stores the integrated value of the operating time of the air conditioning control within the specified time, and the specific operating state value of the air conditioner (1) within the specified time Number of times file to store the number of times of air conditioning control
(6d) and an abnormality prediction file (6e) for storing abnormality prediction data corresponding to the preliminary signal of the state determination means (63), and receive in real time from the air conditioner (1, 1, ...). Data processing means for writing the operation data and abnormality prediction data of the operation status value corresponding to the code of each file (6a to 6e) from each operation data and the preliminary signal of the status determination means (63, 71, ...) to each file ( 65) and a regular transmission means (66) for transmitting the operation data and abnormality prediction data stored in each of the files (6a to 6e) to the host controller (7) at preset time intervals. A condition monitoring device for an air conditioner. 6. The state monitoring device for an air conditioner according to claim 1, wherein the plurality of state determining means (63, 71, ...) Are state detecting means (Th4, P1, 13 ,. ), The real discriminating means (63) that outputs a preliminary signal when the instantaneous operating state value reaches the monitoring value, and the state signal of the state detecting means (Th4, P1, 13, ...) A condition monitoring device for an air conditioner, comprising: a trend discriminating means (71) which outputs a preliminary signal when a driving condition value indicating a tendency of a driving condition in the vehicle reaches a monitoring value. 7. The state monitoring device for an air conditioner according to claim 1, wherein the plurality of state determining means (63, 71, ...) Are state detecting means (Th4, P1, 13 ,. ), The real discriminating means (63) that outputs a preliminary signal when the instantaneous operating state value reaches the monitoring value, and the state signal of the state detecting means (Th4, P1, 13, ...) Trend discriminating means (71) that outputs a preliminary signal when the operating state value that indicates the operating state tendency within
And a control discriminating means (72) for receiving a status signal from the status detecting means (Th4, P1, 13, ...) And outputting a standby signal when the operating status value of the air conditioning control within a predetermined time reaches a monitoring value. A condition monitoring device for an air conditioner characterized by being provided. 8. The condition monitoring device for an air conditioner according to claim 1, wherein the abnormality predicting means (73) receives a preliminary signal from all state determining means (63, 71, ...). A condition monitoring device for an air conditioner having a logical product function for outputting an abnormality prediction signal. 9. The condition monitoring device for an air conditioner according to any one of claims 1 to 7, wherein the abnormality predicting means (73) is a preliminary signal for any of the status determining means (63, 71, ...). A condition monitoring device for an air conditioner, which is provided with a logical sum function for outputting an abnormality prediction signal when receiving a signal. 10. The state monitoring device for an air conditioner according to claim 1, wherein each state determining means (63, 71, ...) Has a first monitoring value and the first monitoring value.
Having a second monitoring value that is a value that is more stringent than the monitoring value,
When the operating state value reaches the first monitoring value, the first preliminary signal is output, and when the operating state value reaches the second monitoring value, the second preliminary signal is output, while the abnormality predicting means (73) When a first preliminary signal of the discriminating means (63, 71, ...) Is received and an abnormal predicting signal is output, and a second preliminary signal of any of the state discriminating means (63, 71, ...) Is received. A condition monitoring device for an air conditioner, comprising: a logical sum function for outputting an abnormality prediction signal. 11. The state monitoring device for an air conditioner according to claim 3, wherein the state discriminating means (63) of the local controller (6, 6, ...).
Is characterized by being constituted by a real discriminating means (63) for receiving a state signal of the state detecting means (Th4, P1, 13, ...) And outputting a preliminary signal when the instantaneous operating state value reaches a monitoring value. Air conditioner status monitoring device. 12. The condition monitoring device for an air conditioner according to claim 3, wherein the air conditioner (1,1, ...) And the local controller (6,6, ...) Are dedicated lines (52). ), While the local controller (6,6, ...) and the host controller
(7) is a condition monitoring device for an air conditioner, which is connected by a telephone line (53). 13. The condition monitoring device for an air conditioner according to claim 6 or 7, wherein the trend determination means (71) is a specific operating state value of the air conditioner (1) and is within a predetermined time period. A condition monitoring device for an air conditioner, which is configured to output a preliminary signal when a representative value of the above becomes a monitoring value. 14. The condition monitoring device for an air conditioner according to claim 6 or 7, wherein the trend determination means (71) is a specific operating state value of the air conditioner (1) and indicates the operating state within a predetermined time. A condition monitoring device for an air conditioner, which is configured to output a preliminary signal when the maximum and minimum values become monitoring values. 15. The condition monitoring device for an air conditioner according to claim 6 or 7, wherein the trend judging means (71) is a specific operating state value of the air conditioner (1) and is within a predetermined time period. When the representative value of is the monitored value, the standby signal is output and the air conditioner
Condition monitoring of an air conditioner characterized in that it is configured to output a preliminary signal when the maximum and minimum operating condition values within a predetermined time that are the specific operating condition values in (1) become monitoring values. apparatus. 16. The condition monitoring device for an air conditioner according to claim 1, wherein the abnormality predicting means (73) is a refrigerant based on a preliminary signal of each state determining means (63, 71, ...). A condition monitoring device for an air conditioner, which predicts a shortage and outputs a gas shortage prediction signal. 17. The state monitoring device for an air conditioner according to claim 1, wherein the abnormality predicting means (73) is used based on a preliminary signal of each state determining means (63, 71, ...). A condition monitoring device for an air conditioner, which predicts contamination of the side heat exchanger (31) or contamination of the filter in the utilization side heat exchanger (31) and outputs a contamination prediction signal.