JPH0363449A - Display device for air conditioner - Google Patents

Abstract

PURPOSE:To manufacture a small-sized display device having high extend ability without requiring a plurality of display lamps by changing over a display lamp used for operation display, timer operation display, etc. to one for indicating trouble on trouble. CONSTITUTION:An operation lamp 1 and a timer lamp 2 are lit during normal operation, but all display lamps 5 are put out once when trouble is detected, and only the timer lamp 2 is controlled so as to be flashed through a flashing method in response to a trouble mode. A control content is stored in the micro- computer of a control circuit section 6. Since the number of flashing may be increased even when trouble display modes are augmented by system change, etc., the method is easy to correspond to system change, etc. Flashing is started after resetting by a reset button, and the certainty of discrimination is increased when a sound is generated synchronized with flashing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device that displays failure modes of an air conditioner.

[Conventional technology]

Conventional display devices are equipped with a plurality of display lamps dedicated to displaying failures, as described in Japanese Patent Application Laid-Open No. 60-91154.
The failure modes were indicated by a combination of multiple indicator lamps.

[・Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into account the cost and display space, and requires multiple indicator lamps for failure indication, which increases the cost and increases the size of the display device. The mode changes, which caused service complications.

An object of the present invention is to provide a compact and highly expandable display device for an air conditioner that displays a malfunction, without requiring a plurality of display lamps.

Another object of the present invention is to provide a display device that allows easy identification of failure modes and reliable confirmation.

[Means to solve the problem]

In order to achieve the above object, the indicator lamps that are normally used to indicate operation, timer operation, etc. are switched to indicate a failure when a failure occurs.

In addition, the distinction between the display during normal operation and the display during failure,
There are multiple types of failures, and the failure indications are distinguished by changing the number of times they blink, and each frame is distinguished by being off for a longer time than the blinking.

[Effect]

Possible methods of distinguishing the display lamps during normal operation and during failure include changing the color or brightness, but the display lamps would be expensive and the display control would be complicated. On the other hand, the present invention distinguishes between the on/off state and the blinking state, so that control can be performed at low cost and simple.

Regarding the differentiation of blinking states, it is conceivable to use the blinking period as in Morse code, as shown in Figure 6. is difficult. In contrast, the present invention distinguishes by the number of blinks, so even an amateur can easily distinguish them.

[Example] Examples of the present invention will be described below with reference to FIGS. 1, 2, 3, and 4.
This will be explained with reference to the drawings and FIG.

FIG. 4 is an excerpt of the display function part of the control circuit of the air conditioner. 1 is an operation lamp that displays the running/stop status, 2 is a timer lamp that displays the timer setting status,
3 is a hot key lamp that displays the preheating operation and defrosting operation status during heating operation, and 4 is a filter lamp that displays when the indoor air filter needs to be cleaned. Reference numeral 5 denotes a display device including display lamps. A control circuit section 6 controls the display lamps 1 to 4, controls the entire operation of the air conditioner, and is composed of a microcomputer or the like.

FIG. 5 shows the appearance of the display unit of the air conditioner. The display lamps described in FIG. 4 are arranged as shown.

Here, possible failure modes of the air conditioner include disconnection of the thermistor for detecting room temperature, failure of the overload protection device, etc., but the control circuit section is designed to display the display as shown in Figure 2 according to each failure mode. Figure 63 shows failure mode 3 as an example.
The details of the first period of blinking cycle etc. are shown below. The display lamp is turned on three times with a lighting time tl and a lighting-off time t1, and is turned off for a time t2 which is sufficiently longer than tl. Repeat this cycle thereafter.

Similarly, in the case of failure mode N, the light is turned on N times, turned off for t2, and thereafter turned on N times and turned off for 12 times repeatedly.

It is easy to understand if the t1 time is set to 0.5 seconds and the t2 time is set to about 5 seconds.

FIG. 1 shows a time chart of transition from normal operation display to failure display. In the case of this embodiment, the timer lamp is set as a failure indicating lamp.

During normal operation, the operation lamp and timer lamp are lit, but when a failure is detected, all the display lamps are turned off, and then only the timer lamp is turned off depending on the failure mode.
It is controlled to blink using the blinking method shown in the figure. The above control contents are stored in the microcomputer of the control circuit section 6.

According to this embodiment, even when the number of dots that repeat one blink at intervals of t2 increases, the number of blinks can be increased, making it easy to respond to changes in the system.

Further, by pressing the reset button, the device starts blinking after resetting, outputs a blinking pulse train, and generates a sound by a buzzer or the like in synchronization with one blink. This increases the certainty of failure mode identification.

〔Effect of the invention〕

According to the present invention, an existing indicator lamp can be used without providing a new indicator lamp for displaying a failure mode.
The display device is inexpensive and compact.

Furthermore, since the failure mode is determined by the number of blinks of the indicator lamp, even an amateur can easily identify the failure mode, and maintenance in the event of failure becomes quick and easy.

Furthermore, by increasing the number of blinks, failure modes can be added, making it easier to respond to changes in the system.

[Brief explanation of drawings]

FIG. 1 is a time chart showing one embodiment of the present invention, and FIG.
Figure 3 is a diagram showing the display lamp blinking state, Figure 3 is a diagram showing the display lamp blinking cycle, Figure 4 is a control block diagram, Figure 5 is a diagram showing the main parts of an air conditioner showing the external appearance of the display device, FIG. 6 is a diagram showing a possible blinking state of the indicator lamp other than the present invention. 1... Operating lamp, 2... Timer lamp, 3
... Hot key lamp, 4 ... Filter lamp, 5 ... Display device, 6 ... Control circuit section. Figure 3 Figure 4 316-

Claims (1)

[Claims] 1. In the case of an air conditioner that has an indicator lamp for displaying operation, etc., if any malfunction occurs in the air conditioner,
One of the indicator lamps used to indicate operation, etc. was switched to indicate a failure, and the failure was indicated by blinking the indicator lamp.
A display device for an air conditioner characterized by displaying a plurality of failure details based on the number of blinks.