JPH02110242A - Remote control failure diagnosis device for airconditioner - Google Patents

Abstract

PURPOSE:To predict or judge even such failures induced by mechanical lock or refrigerant leak for a compressor, a fan and the like and monitor and control a plurality of airconditioners from a remote position by installing a diagnosis means which diagnoses the presence of troubles in an airconditioner from the data incorporated by a control data incorporating means and an operation data incorporating means. CONSTITUTION:An indoor instrument 20 for a first airconditioner inputs control command values, such as an operation mode preset by a user, preset values about an indoor air capacity, an open circuit in a temperature sensor electrically checked, and an operation command of a compressor into a diagnosis device 1 from a control input line 3, using a remote controller 21. Time data is also input therein simultaneously. The diagnosis device 1 incorporates operation data for the first airconditioner which covers the discharge pressure, suction pressure, and the discharge piping temperature independently. Moreover, the diagnosis device 1 computes and diagnoses the presence of troubles of an airconditioner 20 from a specified program, displays the result on a display means, and sends the result to a command giving means so that the airconditioner 20 may be operated and suspended.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a remote failure diagnosis device for air conditioners.

[Conventional technology]

Conventionally, air conditioners equipped with a microcomputer automatically check for disconnections in the room temperature sensor or heat exchange sensor, or activate the overload protection switch on the compressor, using LEDs or other indicators to diagnose failures in air conditioners. was outputting to the display device.

[Problem to be solved by the invention]

The conventional device described above has the following problems.

(1) Previously, failures were limited to failures that could be checked electrically, and fatal air conditioner failures such as mechanical problems such as compressors, fan morphs, and refrigerant leaks could not be predicted or determined. could not.

(2) Furthermore, since the display of the failure details was simple, such as with an LED, it was not possible to identify complex failures at the same time with a high probability. However, it was not possible to comprehensively judge multiple air conditioners from a single location of concentrated information and remotely control them, for example to perform an emergency shutdown.

[Means to solve the problem] The present invention takes the following measures to solve the above problems.

That is, a remote failure diagnosis device for an air conditioner includes means for importing control data from an air conditioner equipped with a microcomputer controller, means for importing operational data of the air conditioner, and the control data importer 1.
a diagnostic means for diagnosing the presence or absence of an abnormality in the air conditioner from the data captured by the stage and the operation data capturing means; a display means for displaying the diagnosis result by the diagnostic means;
and command means for outputting an operation or stop command to the air conditioner based on the diagnosis result by the diagnosis means.

(Function) With the above means, control data is taken in from the target air conditioner by means for taking in control data. Also,
Similarly, operating data is captured by the operating data capturing means. Further, the diagnosing means calculates and diagnoses whether or not there is an abnormality in the air conditioner using a predetermined program from the means for taking in the operating data and the means for taking in the control data. The diagnosis result is sent to the display means and displayed by the display means, and is also sent to the command means, which operates or stops the air conditioner. In this way, the failure state of the air conditioner is comprehensively diagnosed from the control data and the operation data, and display and commands are issued.

[Example] An example of the present invention will be described with reference to FIGS. 1 to 11. Fig. 1 is an overall block diagram, Fig. 2 is a configuration block diagram of the remote fault diagnosis device (hereinafter referred to as the diagnosis device), and Fig. 3
The figure shows the configuration block diagram of the Air Conditioner A (hereinafter referred to as Air Conditioner II), Figure 4 is the flowchart of the central processing unit, Figure 5 is the time data diagram, Figure 6 is the control data diagram, and Figure 7 is the control data diagram. The figure is an operation data diagram, Figure 8 is a flowchart of compressor lock, Figure 9 is a flowchart of gas refrigerant leak,
FIG. 10 is a flowchart of the fan rotor, and FIG. 11 is a flowchart of air filter clogging.

In FIG. 1, an outdoor unit 22 is connected to an indoor unit 20 of a first air conditioner through a connection line 23, and a remote control 21 is also connected thereto. Further, the indoor unit 20 is connected to the diagnostic device 1 through a control input line 3 and a control output line 2. Similarly, a second air conditioner is connected. In the figure, 5 is a control output line, 6 is a control input line, 24 is an indoor unit, 25 is a remote control, and 26 is an outdoor unit. Furthermore, the diagnostic device 1 is connected to a computer or the like via a telephone line 8.

As shown in FIG. 2, the diagnostic device 1 includes a central processing unit 15, a digital input device connected to a control input line 3.6, a digital output device 13 connected to a control output line 2.5, and an analog human power line 4.7. An analog input device connected to 11. Abnormal LED 17 and normal L [! A display 14 connected to a telephone line 8 and a telephone modem 16 connected to a telephone line 8 are provided. Furthermore, a power supply 19 and an initial setting switch 50 are connected. Further, the analog input line 4.7 is connected to the compressor section of the first air conditioner and the second air conditioner, respectively.
They are connected via D converters 9 and 51. The first air conditioner is installed as shown in FIG. In the figure, an indoor controller 40 is connected to a control output line 2 and a control input line 3, and is also connected to an outdoor controller 41 via a connection line 23. Further, the indoor controller 40 is connected to the remote control 21 and to the thermistor 42 via a converter 43. Furthermore, the fan motor 3 is controlled via the controller 34.
Leads to 0. The outdoor controller 41 is connected to the compressor 31, outdoor fan motor 32, and four-way valve 33 via respective controllers 37, 38, and 39. In addition, the power supply is for each controller 37, 38, 39, controller power 1ri3
s, connected to 36. In addition, the controller power
3s and 36 are connected to an indoor controller 40 and an outdoor controller 41, respectively.

In the above configuration, the indoor unit 20 of the first air conditioner operates according to the operation mode set by the user from the remote controller 21, set values such as indoor air volume, etc., as shown in FIG. Controller abnormality signals such as serial transmission failure, current values of control sensors such as a room temperature sensor and heat exchanger sensor, and control command values such as compressor operation commands are input to the diagnostic device 1 from the control input line 3. At the same time, the time data shown in FIG. 5 is also input in the same manner. These are input as data to the central processing unit 15 via the digital input device 10 shown in FIG. Further, the diagnostic device 1 independently takes in the discharge pressure, suction pressure, discharge pipe temperature, etc. shown in FIG. 7 as operating data of the first air conditioner. These are input as data from the analog input device 11 to the central processing unit 15 via the A/D converter 9 shown in FIG. The central processing unit 15 checks the initial data after manually inputting the time data, control data, and operation data based on the flowchart shown in FIG. This is used for the next fault diagnosis algorithm, and when installing or inspecting the air conditioner, a service person can use the initial setting switch 50 in Figure 2.
, the central processing unit 15 is the digital input device 1 at this time.
0 and data input manually from the analog input device 11 are stored internally as initial data. Next, check the abnormal signal output from the indoor control according to the flowchart in Figure 3, check the compressor lock according to the flowchart in Figure 8, check the fan lock according to the flowchart in Figure 1O, and check the gas leak according to the flowchart in Figure 9. , Check for air filter clogging, etc. according to the flowchart in FIG. The presence or absence of these abnormalities is determined, and if there is no abnormality, a normal LE01 is displayed via the display 14 in FIG.
8 and return to the starting point ■ of the control flowchart. If there is an abnormality, please report the details of the abnormality to telephone modem 1.
6 to an external computer (not shown). At the same time, it is determined whether or not to stop the first air conditioner urgently, and when the first air conditioner is to be stopped, it is inputted to the indoor unit 20 from the control output line 2. As shown in FIG. 3, the first air conditioner includes an indoor controller 40 and an outdoor controller 41, and the indoor controller 40 transmits the data shown in FIGS. 5 and 6 via the control line 3 as described above. Send to diagnostic device l.

Further, when receiving abnormal stop control data from the control output line 2, the fan motor 30 is stopped via the fan motor controller 34, and at the same time, the abnormal stop control data is transmitted to the outdoor controller 41.

In response to this, the outdoor controller 41 stops the compressor 31, outdoor fan motor 32, and four-way valve 33 via the compressor controller 37, outdoor fan motor controller 38, and four-way valve controller 39, respectively. Next, according to the flowchart, the abnormality LED is displayed via the display 14 in FIG.
17, and return to the starting point (■) of the flowchart in FIG. The failure diagnosis for the second air conditioner is also performed in the same manner as above. In the manner described above, it becomes possible to easily perform fault diagnosis of ordinary air conditioners to the same level as an expert.

〔Effect of the invention] As explained above, the present invention has the following effects.

(1) Abnormalities such as air conditioner gas leaks, compressor abnormalities, fan motor abnormalities, and air filter clogging can be diagnosed with high probability. Therefore, since these abnormalities are detected before they cause damage to the compressor and the air conditioner is stopped, major damage such as damage to the air conditioner will not be caused.

(2) Furthermore, if connected to the telephone circuit 8, remote monitoring and control is possible, so multiple air conditioners can be serviced and maintained from one location, reducing service costs.

[Brief explanation of the drawing]

Fig. 1 is an overall block diagram of an embodiment, Fig. 2 is a block diagram of the configuration of a diagnostic device of the embodiment, Fig. 3 is a block diagram of an air conditioner to which the embodiment is applied, and Fig. 4 is a block diagram of the same. FIG. 5 is a time data diagram of the embodiment; FIG. 6 is a control data diagram of the embodiment; FIG.
8 is a flowchart of the compressor lock of the same embodiment, FIG. 9 is a flowchart of gas refrigerant leakage of the same embodiment, and FIG. 10 is a flowchart of the fan lock of the same embodiment. Flowchart Figure 11 is a flowchart diagram of air filter clogging in the same embodiment. l-Remote fault diagnosis device, 2.5-Control output cotton 3.6
Control input line, 4.7-analog input line 8-telephone line, 9,51 A/D converter lO-digital human power H+ 11-analog input device. 12-timer, 13 digital output device 16-telephone modem, 15-central processing unit 17 abnormality LED, I8-normal LIED
19-power supply, 20.24-indoor unit 2]
, 25 remote control, 22.26-outdoor unit 23,
27 connection wire, 30 - indoor fan motor 31 - compressor, 32 - outdoor fan motor. 33-・Four-way valve, 3437.38.39-・Indoor fan motor, compressor, outdoor fan motor, and four-way valve controller, respectively. 35.36 - Power supplies for the indoor controller and outdoor controller, respectively, 40 - Indoor controller, 41 - Outdoor controller. 42 Thermistor 43 Converter 50 of thermistor 42 - Initial setting switch

Claims (1)

[Claims] means for importing control data from an air conditioner equipped with a microcomputer controller; means for importing operating data of the air conditioner; It is characterized by comprising a diagnostic means for diagnosing the presence or absence of the air conditioner, a display means for displaying the diagnosis result by the diagnosis means, and a command means for outputting an operation or stop command to the air conditioner based on the diagnosis result by the diagnosis means. A remote fault diagnosis device for air conditioners.