JPS62280534A - Trouble detecting device for air conditioner - Google Patents

Abstract

PURPOSE:To take a quick action to the part where a trouble is occurring, by displaying the past trouble data which shows the fact that a protective function has worked, even if an electric power supply is cut OFF after a trouble occurred, by providing a memory part consisting of a rewritable and non-volatile storage element, and by providing a control part which writes a trouble data, which shows that a protective function has worked, in the memory part, and which reads the trouble data out of the memory part. CONSTITUTION:The trouble detecting device of an air conditioner has a memory part 9 which consists fo a rewritable and non-volatile storage element, and a control part 5 which writes a trouble data, which shows that a protective function has worked, in the memory part 9, as well as to read the trouble data out of the memory part when necessary. When the protective function is worked, a trouble data is written in the memory part 9 which consists of a non-volatile storage element, and the data is read out when necessary. Accordingly the trouble data can be displayed again without being erased even if the supply of an electric power is cut off after a trouble occurred. As a result the position of a trouble can be discovered quickly.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) This invention relates to an air conditioner that has a function of protecting against abnormal conditions, and in particular, the invention relates to an air conditioner that has a function of protecting against abnormal conditions. The present invention relates to a possible abnormality detection device for air conditioners.

[Conventional technology]

Shishi always comes out! Examples of devices with a protection function that automatically activates at 1 o'clock to protect the air conditioner include those shown in Figures 3 and 4.
There is something like the one shown in figure. That is, Fig. 3 is a block diagram showing the general circuit configuration of an air conditioner. 6.7 is an input circuit and an output circuit; and 8 is a display section.

FIG. 4 is a diagram showing the overall configuration of a separate air conditioner having a control circuit configuration as shown in F. In the figure, reference numeral 10 denotes a remote controller (remote operation device) having a function of displaying abnormal data, which will be described later, and a control circuit section 1 configured on the board.
1. Switches 12 for various settings and a display circuit 13 for displaying operating conditions are provided. 14・, 15
The indoor unit and the outdoor unit each have control circuit sections 16 and 17 configured on a board, and both are connected to the remote controller 10 by a signal line 1B of Senkawa. The indoor unit 14 is equipped with a sensor 20 that detects the temperature of the piping connected to the heat exchanger 19 and a sensor 21 that detects the temperature of the indoor air that is sucked in. The outdoor unit 15 is equipped with a sensor 20 that detects the temperature of the pipes connected to the heat exchanger 19, and a sensor 21 that detects the temperature of the indoor air that is sucked in. A sensor 24 is installed to detect the temperature of the piping of the device 23.

Next, the operation will be explained with reference to the flowchart shown in Figure yJ5. The remote controller 10 and the control circuit sections 11, 16, 17 of the indoor/outdoor units 14.15 constitute the control section 5 shown in FIG. 2
4, the pipe temperature is checked (step 101), the sensor 24 is checked to see if it is properly connected (step 102), and the protector 23 of the compressor 22 is checked to see if it is operating (step 102). 103) is performed, and the inspection information is sent to the remote controller 10 that serves as a check monitor. Similarly, indoor unit 1
In the control circuit section 16 of No. 4, the pipe 71 is inspected once by the sensor 20 for detecting the pipe temperature (step 104), and the sensor 20 is checked to see if it is properly connected (step 105). Check whether there is any abnormality in the temperature detection sensor 21 (Step 10)
6) is performed, and the inspection information is sent to the remote controller 10.

Next, the remote controller 10 that serves as a check monitor
In one control circuit section 11, the indoor/outdoor unit 14.1
Based on the information sent from 5, create inspection data for the entire system 1'& (step 107), and determine whether there are any abnormalities as a result of the inspection (step 10).
8) Do.

If there is no abnormality, determine whether the display changeover switch in the switches 12 is set to the check side (step 1).
09) If it is not on the check side at this time, set the operating data such as the set temperature as the display data and proceed to step 11.
0), Check I! If it is I11, past abnormal data (IIF description) is used as display data (step 111).
). Further, if there is an abnormality in step 108, the abnormal data is used as display data (step 112). In these steps 110, 111, and 112, the created display data is displayed on the display circuit 13 of the remote controller 10, and measures are taken for the location where the abnormality has occurred.

[Problem that the invention seeks to solve]

However, in the conventional air conditioner abnormality detection device as described above, when the protective function of each sensor, protection device, etc. is activated, the abnormality data obtained from the inspection result is stored in the volatilization inside the control unit 5. RAM (I
RandomAccess Memory), so if the power supply to the control unit 5 is cut off due to the -L source switch 2 being opened or shutting down after an abnormality occurs, the abnormal data stored in the RAM will be saved. Disappear.

For this reason, the checking function is not performed, and the cause of the abnormality cannot be investigated until it occurs again, resulting in the problem that prompt measures cannot be taken for the abnormal location.

This invention was made to solve these problems, and even if the power supply is cut off after an abnormality occurs, past abnormality data in which the protective function was activated is displayed as necessary. The present invention provides an abnormality detection device for an air conditioner that can quickly take measures against abnormalities.

[F-stage to solve problems]

The abnormality detection device for an air conditioner according to the present invention includes a δ switching h
A storage section consisting of a non-volatile storage element capable of protecting the device, and a control section that writes abnormal data indicating that a protection function has been activated into the storage section and reads out the abnormal data as necessary.

[Effect]

When the protection function is activated, the normal data is written into a storage section consisting of a nonvolatile storage element, and the abnormal data is read out as necessary. Therefore, after the abnormality occurred?
&';Even if the u source supply is cut off, the abnormality data in F is redisplayed without disappearing, making it possible to quickly discover abnormalities.

〔Example〕

An embodiment of the present invention will now be described with reference to the drawings.

It should be noted that the same components as in the prior art are given the same reference numerals and detailed explanations will be omitted.

FIG. 1 is a block diagram showing a schematic configuration of an abnormality detection device for an air conditioner according to the present invention, in which 1 is an input terminal of an AC power supply, 2 is a hand switch, 3 is a step-down transformer, and 4 is a power supply circuit. , 5 is a control unit configured by a microcomputer, 6.7 is an input/output circuit, 8 is a display unit, and 9 is a storage unit consisting of a rewritable non-volatile memory element, which stores abnormal data indicating that the protection function has been activated. is read out by the control section 5, and the it' control section 5 reads and displays the abnormal data as necessary by operating a display changeover switch (not shown). Note that the other configurations are the same as those shown in FIG. 4 and will therefore be omitted.

Next, the operation will be explained. FIG. 2 shows the operation processed by the microcomputer of the control unit 5. As in the conventional case, first, the abnormality of each sensor or its connection state, the detected temperature, and the protective device are checked (step 10).
1 to 106), create inspection data for the entire system using the remote controller (step 107). Then, it is determined whether the inspection result is abnormal or not (step 108).
If there is no abnormality, it is determined whether the display changeover switch (not shown) is on the check side (step 109), and if it is not on the check side, the current operating state is displayed as data (step 110). If the changeover switch is on the check side, the abnormal data is read from the storage section 9 (step 114), and the past abnormal data is used as display data (step 114).
Step 111). If it is determined in step 108 that an abnormality has occurred, the abnormal data is written into the storage section 9 (step 115), and the abnormal data is used as display data. The display data created in this way is then displayed on the display section 8. Here, since the storage unit 9 is composed of a non-volatile memory element that can be rewritten, the stored abnormal data will not be erased even if the power supply is cut off, and can be stored at any time as needed. It can be read and displayed.

Therefore, an abnormal location can be discovered quickly, and prompt treatment can be performed.

Note that the storage section 9 may be provided in the remote controller as in the above embodiment, or may be provided in the indoor unit or the outdoor unit.

[Effects of the Invention] As explained above, according to the present invention, a memory section made of a rewritable non-volatile memory element is provided, and abnormal data is written in this memory section, so that after an abnormality occurs, Even if the power supply is cut off after the protection function is activated, the abnormal data will not disappear, and can be read out and displayed at any time as needed, allowing for quick discovery of abnormalities and abnormalities during service inspections, etc. This has the effect of allowing prompt treatment.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing its operation, and FIG. 3 is a conventional example.
FIG. 4 is a diagram showing the overall circuit configuration of the air conditioner, and FIG. 5 is a flowchart showing the conventional operation. 5...Control unit 8...Display unit 9...Storage unit 10...Remote controller 11.16.1
7...Control circuit section 12...Switches 13...-Display circuit 14...Indoor unit 15...Outdoor unit 20.21, 24...Sensor 23...Protective device Note that the numbers in the drawings indicate the same or equivalent parts.

Claims (2)

[Claims] (1) In an air conditioner equipped with a protection function that operates to protect the air conditioner when an abnormality occurs, a memory section consisting of a rewritable non-volatile memory element is provided, and the memory section indicates the activated protection function. An abnormality detection device for an air conditioner, comprising a control section that writes abnormal data and reads the abnormal data from the storage section. (2) The abnormality detection device for an air conditioner according to claim 1, wherein the control section reads abnormal data from the storage section and displays it when the display changeover switch is operated.