JPH04356645A - Self trouble checking and displaying device in air conditioner - Google Patents

Abstract

PURPOSE:To improve the workability or service characteristic by a method wherein a display expressing a normal state is carried out for a specified period of time after starting an operation of air conditioning or after a completion of repairing work and then a conformation of normal state of an air conditioner can be easily carried out. CONSTITUTION:A self-trouble checking and displaying device for an air conditioner is comprised of a plurality of sensors 1 for sensing a state of an air conditioner, a trouble discriminating means 2 for discriminating abnormal state of the air conditioner in response to an outputs from the plurality of sensors, a normal state discriminating means 5 for discriminating a normal state and outputting it when the trouble discriminating means does not output any information, a timer 4 for outputting only for a specified period of time an output of the normal state discriminating means after the air conditioner starts to operate, and a displaying means 3 for displaying a numeral number expressing the normal state when the normal state discriminating means has an output and displaying a numeral number defined in response to an output from the trouble discriminating means when the output is present.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-failure diagnosis display device for an air conditioner.

0002

2. Description of the Related Art A block diagram of a conventional self-failure diagnosis display device for an air conditioner of this type is shown in FIG. As shown in FIG. 6, a plurality of sensors 1 detect the state of the equipment, and based on the outputs of the plurality of sensors 1, a failure determination means 2 determines and outputs a failure. A predetermined number was displayed according to the determined and output failure details to inform users and service personnel of the failure details of the air conditioner.

0003

[Problems to be Solved by the Invention] However, with the above configuration, the display is only displayed when the fault determining means 2 determines that there is a fault, so that the equipment operates normally and the self-failure diagnosis display device operates normally. The problem was that it was not possible to confirm that there were any.

[0004] The present invention solves the above-mentioned problems of the conventional example, and makes it possible to easily check the normality of an air conditioner by causing a self-failure diagnosis display device to display a message indicating normality for a certain period of time when the air conditioner is normal. The purpose is to improve workability and serviceability.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a plurality of sensors that detect the state of an air conditioner, and a failure determination method that determines an abnormality of the air conditioner from the outputs of the plurality of sensors. means, a normality determining means for determining and outputting a normal state when the failure determining means does not output an output, a timer for outputting the output of the normality determining means only for a certain period of time after the air conditioner starts operating, and the normality determining means. Numerical display means is provided for displaying a number indicating normality when there is an output from the failure determining means, and for displaying a predetermined number according to the output when the failure determining means has an output.

Further, the present invention is provided with a second timer that causes the normality determining means to output an output only for a certain period of time after the failure determining means stops outputting after the failure repair of the air conditioner is completed.

[0007]

[Operation] By providing a self-failure diagnosis display that displays for a certain period of time after the start of operation whether the equipment is operating normally, the present invention can be easily checked during installation work of an air conditioner. Not only is this possible, but since it is only displayed for a certain period of time necessary for confirmation, the device does not consume unnecessary power and the user is not misled.

Further, according to the present invention, the serviceman can easily confirm that the repair has been completed by displaying the normal status for a certain period of time after the failure has been repaired.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A self-failure diagnosis display device for an air conditioner according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a self-failure diagnosis display device for an air conditioner according to an embodiment of the present invention. A plurality of sensors including pressure sensors and the like for detection; 2 a failure determination means for determining a failure from the outputs of the plurality of sensors and outputting a predetermined output according to the type of failure; 3 a failure determination means according to the output of the failure determination means; 4 is a timer that measures and outputs a certain period of time after the air conditioner starts operating; 5 is a display means 3 only when there is no output from the failure determination means 2 and there is an output from the timer 4; This is a normality determining means that outputs a number to indicate normality.

[0011] With this configuration, when the air conditioner is operated normally, a number indicating the normality of the equipment is displayed on the display means 3 for a certain period of time, allowing the service person to confirm the normal state of the equipment and the completion of troubleshooting. Furthermore, in the event of a failure, a number representing the type of failure is displayed on the display means 3, allowing the service person to quickly determine the failure and take appropriate action.

FIG. 2 is a circuit diagram of an embodiment of the present invention, in which 6 is a temperature sensor that detects the temperature of the pipe, 7 is a pressure sensor that detects the pressure of the pipe, and 8 is a CPU, ROM, RAM, etc. Temperature sensor 6 with so-called one-chip microcomputer
The state of the equipment detected by the pressure sensor 7 is determined, and a number indicating normality or failure type is displayed on the display 3 consisting of 7 segments.

With the above configuration, the operation of the self-failure diagnosis display device will be explained based on the flowchart of FIG. When the device is powered on and the program is started, the microcomputer 8 takes in the data detected by the temperature sensor 6 and pressure sensor 7 in step 10, compares it with pre-stored data in step 11, and determines the failure and failure details. to judge. If there is a failure, then in step 12, a predetermined number indicating the nature of the failure is displayed on the display means 3 until the failure is corrected. Also, if there is no malfunction and within 5 minutes of starting operation,
In step 13, a fixed number indicating normality is displayed on the display means 3.

FIG. 4 is a block diagram showing a self-failure diagnosis display device for an air conditioner according to a second embodiment of the present invention. A plurality of sensors consisting of pressure sensors and the like that detect pressure; 2 a failure determination means that determines a failure from the outputs of the plurality of sensors and outputs a predetermined output according to the type of failure; 3 a failure determination means; Display means for displaying numbers according to the output; 4 is a first timer that measures and outputs a certain period of time after the air conditioner starts operating; 10 measures and outputs a certain period of time after the failure determination means 2 stops outputting. Second
The timer 5 is a normality determining means that outputs an output to the display means 3 and displays a number indicating normality only when there is no output from the failure determining means 2 and there is an output from the first timer 4 or the second timer 10. .

[0015] With this configuration, when the air conditioner is operated normally or when a malfunction in the air conditioner is repaired, a number indicating the normality of the equipment is displayed on the display means 3 for a certain period of time. can quickly confirm the normal status of equipment and the completion of repairs. Further, in the event of a failure, a number representing the type of failure is displayed on the display means 3, so that a service person can quickly determine the failure and take appropriate action.

In the above configuration, the operation of the self-failure diagnosis display will be explained based on the flowchart shown in FIG. When the device is powered on and the program is started, the microcomputer 8 takes in the data detected by the temperature sensor 6 and pressure sensor 7 in step 10, compares it with pre-stored data in step 11, and determines the failure and failure details. to judge. If there is a failure, then in step 12, a predetermined number indicating the nature of the failure is displayed on the display means 3 until the failure is corrected. If there is no failure and the operation is within 5 minutes from the start of operation or within 5 minutes after the failure has been repaired, a predetermined number indicating normality is displayed on the display means 3 in step 13.

[0017]

Effects of the Invention As is clear from the above description, the present invention provides a self-failure diagnosis display device that displays whether the equipment is operating normally for a certain period of time after the start of operation or the completion of troubleshooting. Not only is it possible to easily check the results of work confirmation and malfunction repair during machine installation work, but it also displays only a certain amount of time necessary for confirmation, so the machine does not consume unnecessary power, and the user There will be no misunderstanding.

[Brief explanation of drawings]

[Fig. 1] Block diagram of one embodiment of the present invention

[Fig. 2] Circuit diagram of one embodiment of the present invention

FIG. 3: Flowchart of one embodiment of the present invention

FIG. 4 is a block diagram of a second embodiment of the present invention.

[Fig. 5] Second aspect of the present invention
Flowchart of an example of

[Figure 6] Block diagram of conventional example

[Explanation of symbols]

1 Multiple sensors 2 Fault determination means 3 Display means 4. Timer 5 Normality determination means 6 Second timer

Claims (2)

[Claims] Claim 1: A plurality of sensors that detect the state of an air conditioner; a failure determination means that determines whether the air conditioner is abnormal based on the outputs of the plurality of sensors; and a failure determination means that determines whether the air conditioner is normal when there is no output. a timer that causes the output of the normality determining means to be output only for a certain period of time after the air conditioner starts operating; a number indicating normality is displayed when there is an output of the normality determining means; A self-failure diagnosis display device for an air conditioner, comprising a display means for displaying a predetermined number according to the output when there is an output from the failure determination means. 2. A self-failure diagnosis display device for an air conditioner according to claim 1, further comprising a timer that outputs the normality determining means only for a certain period of time after the failure determining means stops outputting after the failure of the air conditioner is repaired. .