JPH0435663B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to an improvement in a display device for a refrigerator, which uses a display element to display, for example, the current operating state of the refrigerator or an abnormality in abnormal operation using a display element. (Prior Art) In general, display devices for refrigerators of this type, especially those for small air conditioners, include a display element for displaying the current operating status and a display element for displaying abnormal locations in the event of abnormal operation. It is preferable to use the same function to improve the economical efficiency and to improve the installation space of the equipment so that it can be further miniaturized. Therefore, for example, in the device disclosed in Japanese Utility Model Application Publication No. 58-13427, the display element for displaying room temperature during normal operation and the display elements for displaying cooling and heating operation are used to display abnormal locations during abnormal operation. When there is an abnormality in the air conditioner unit, the display element that is displaying the room temperature will blink, and when there is an error in the signal transmission system, the display elements for cooling and heating operation will blink alternately. , to alert the occupants of the abnormal operation. (Problems to be Solved by the Invention) However, in the above-mentioned conventional device, the room temperature display element that blinks during abnormal operation varies depending on the room temperature situation at that time, and when there is an abnormality in the signal transmission system, both cooling and heating cannot be activated. For example, display elements blink alternately, and the correspondence between the display elements that should be displayed in response to an abnormal location during an abnormal operation is not 1:1 and is complicated. For this reason, it is particularly difficult to set up a large number of abnormal location displays. had the disadvantage that it was difficult to easily distinguish the displayed contents. The present invention has been made in view of the above, and an object of the present invention is to display the contents of each display separately in advance when one display element is used to display both the operating status and abnormal location as described above. It is assigned to each element, and in the event of an abnormal operation, the display element that was lighting up to indicate normal operation will be turned off, while other display elements for fault indication will be blinking, and the display element corresponding to the abnormal location will be turned off. By lighting up to display the abnormal location, even if a large number of abnormal location displays are set, the display contents can be easily distinguished and the abnormal location can be immediately grasped, thereby improving the abnormal location display function. There is a particular thing. (Means for Solving the Problem) In order to achieve the above object, the solving means of the present invention, as shown in FIGS. 2 and 3, displays a pre-assigned operating state during normal operation by lighting operation. In the event of an abnormal operation, multiple display buttons LED0 to LED will display the pre-assigned abnormality location.
13 is provided, and an abnormality display element LED 15 is also provided which blinks to indicate the abnormality of operation. Further, an operating state detection means 25 that detects various operating states during normal operation, an abnormal location detection means 26 that detects an abnormal location during abnormal operation, and both detection means 25, 26.
In response to the output of At the same time, the abnormality display element LED 15 blinks and the display element corresponding to the abnormality point
Control means 2 for lighting and displaying LED0 to LED13
7. (Function) As described above, in the present invention, during normal operation, the abnormality display element LED15 does not blink, and in this state, the display element LED0 corresponding to the current operating state
- Since the LED 13 is controlled to turn on by the control means 27, the current operating state can be easily grasped. In addition, if an abnormality occurs, the lighting display elements LED0 to
The LED 13 is controlled to turn off by the control means 27, and the abnormality display element LED15 is controlled to blink to indicate the abnormal operation state, and in this state, the display elements LED0 to LED13 corresponding to the abnormal location are controlled to turn on by the control means 27. The error location is displayed. Here, the display elements LED0 to LED13 display the assigned abnormality, and each display element LED0 to LED13 and the abnormality correspond to each other, and the display of the abnormality is a lighting display. Therefore, even if a large number of abnormal point displays are set, the abnormal point can be immediately recognized. (Example) Hereinafter, an example of the present invention will be described based on the drawings. Figure 1 shows the schematic configuration of the refrigerant piping system of a multi-type separate air conditioner, where A is the outdoor unit;
B and C are two indoor units arranged in different rooms, and an outdoor heat exchanger 3 having first and second compressors 1 and 2 and an outdoor blower fan 3a in the outdoor unit A. In addition, each indoor unit B, C has a first heat exchanger section, 4a, and
Indoor heat exchangers 4 and 5 are built in, and are divided into two parts: a heat exchanger section 5a and a second heat exchanger section 4a, 5a, and each have one blower fan 4c, 5c. And the first heat exchanger parts 4a, 5a of each indoor heat exchanger 4, 5
is connected in series with the first compressor 1 and outdoor heat exchanger 3 of the outdoor unit A through refrigerant piping 6...
A refrigerant circulation circuit 7 is formed, and each second heat exchanger section 4b, 5b also has a refrigerant pipe 8...
The second compressor 2 and outdoor heat exchanger 3 of outdoor unit A
A second refrigerant circulation circuit 9 is formed by connecting the two in series. Inside the outdoor unit A, there is built-in a control circuit 15 that includes a CPU and the like that controls the operation of the air conditioner and controls the display of its operating status. As shown in FIG. 2, the control circuit 15 includes the first
an inverter 16 that alternately controls the capacity of the compressor 1 and the second compressor 2, for example, every predetermined operating time; a first room temperature sensor (THA) that detects the temperature in the room where one indoor unit B is disposed; A second room temperature sensor (THB) that detects the temperature in the room where the other indoor unit C is installed is connected to each other so that signals can be sent and received, and the actual temperature from both room temperature sensors (THA) and (THB) is Depending on the deviation between the room temperature and the room temperature target value (room temperature set value) in each room, one compressor 1 or 2 is controlled to operate/stop at a fixed capacity using a commercial power source, and the other compressor 2 or 1 is controlled by an inverter. 16, the air conditioning capacity is adjusted step by step in 10 steps from "0" to "9". Further, a display device 20 having display elements LED0 to LED15 and LED0' to LED15' each consisting of 16 light emitting diodes for each of the refrigerant circulation circuits 7 and 9 is connected to the control circuit 15 so as to be able to send and receive signals by optical transmission. and each display element LED0, LED0'~
The display contents of the operating status of the LEDs 15 and 15' are assigned and set in advance as shown in Table 1.

【table】

[Table] Furthermore, the control circuit 15 includes each compressor 1,
2 and as a protection function for the refrigerant circulation systems 7 and 9,
The first and second compressors each operate to open when an overcurrent is applied to each drive motor of the first compressor 1 and the second compressor 2.
Overcurrent relay for compressor motor (OC1), (OC2)
and first and second compressor protection thermoses (CTP1) and (CTP2) that open when the temperature of each coil of the motor for the first and second compressors 1 and 2 rises excessively;
the first, each opening upon an overrise of the high pressure pressure from 2;
Second high-pressure pressure switches (HPS1), (HPS2),
first and second indoor fan protection thermos (F1) that open when the coil temperature of the drive motor of the indoor ventilation fans 4c and 5c of each indoor unit B and C rises excessively;
(F2), an overcurrent relay (OC3) for the outdoor fan that similarly opens when an overcurrent is applied to the drive motor of the outdoor blower fan 3a, and an overcurrent relay (OC3) that opens when the outdoor heat exchanger 3 detects defrosting operation. Activated defrost detection relay 2
1, a heating high pressure control relay 22 that detects when the refrigerant is under high pressure control in the heating operation state and operates to open, and a cooling low pressure control relay 23 that detects when the refrigerant is under low pressure control in the cooling operation state and operates to close. are connected to be able to send and receive signals, and the inverter 16
It is now possible to input trip signals and droop signals from. Of the display device 20, the first to 14 display elements belonging to the first refrigerant circulation circuit 7 are LEDs.
0 to LED13 are pre-allocated and set to light up when the above-mentioned relay or thermostat is opened, that is, when there is an abnormal operation, and display 14 types of abnormal operation contents shown in Table 2, and the 16th display element
The LED 15 is used for blinking indication of abnormal operation.

【table】

[Table] Therefore, the 14 display elements LED0 to LED13 belonging to the first refrigerant circulation circuit 7 display the pre-assigned operating status during normal operation, and display the pre-assigned operating status during abnormal operation. 16th display element LED15
This constitutes an abnormality display element that flashes to indicate abnormal operation. Next, the operation of the control circuit 15 will be explained based on the flowchart shown in FIG. Start,
In step S1, the first and second room temperature sensors (THA),
After inputting each actual room temperature signal from (THB),
In step S2, the current operating mode is determined based on the actual room temperature values. That is, the cooling or heating operation mode, the capacity value of the compressor 1 or 2, that is, the frequency setting signal value to the inverter 16, and the capacity control side compressor to be selected are determined based on the integration of the internal timer, etc. do. After that, in step S3, it is determined whether or not there is an abnormal input such as a trip signal or droop signal of the relay, thermostat or inverter 16 due to overcurrent, etc., and it is determined whether there is any abnormal input.
In the case of NO, in step S4, the display elements LED0, LED0' to LED15,
Control the lighting of the LED 15' and return to step S1.
On the other hand, in the case of YES with abnormal input,
In step S5, the 16th refrigerant circuit belonging to the first refrigerant circulation circuit 7 is
At the same time, the display element LED15 corresponding to the abnormal operation point is controlled to blink.
Control the lighting of the LED 13 and return to step S1. Therefore, in the operation flow of the control circuit 15 shown in FIG. 3, various operating states such as cooling operation during normal operation, heating operation, and capacity control stage of the compressors 1 and 2 are detected in steps S1 and S2. In addition, in step S3, an abnormal location detecting means 26 is configured to detect an abnormal location at the time of an abnormal operation such as overcurrent of the compressors 1 and 2 or abnormally high pressure of the refrigerant. It consists of In addition, by steps S4 and S5, during normal operation, the display elements LED0 to LED corresponding to the current operating status are displayed.
13 is turned on, while at the same time, when the operation is abnormal, the display element that lights and displays the operating state during the normal operation is turned off, and the 16th abnormality display element LED 15 belonging to the first refrigerant circulation circuit 7 is made to blink. At the same time, a display element corresponding to the abnormal location
It constitutes a control means 27 that lights up LED0 to LED13. Therefore, in the above embodiment, for example, when only the first indoor unit B operates and the second indoor unit C stops operating, the operating state is the heating operation, and the first compressor 1 When the capacity is controlled and the total capacity is "3", this operating state is detected by the operating state detection means 25, and the control means 27 also indicates that the display 20 indicates that the first refrigerant circulation is in progress as shown in FIG. 16 display elements belonging to circuit 7 LED0~
3rd, 10th, and 13th display elements among LED 15
Only LED3, LED10, and LED13 are controlled to light up to display the current operating status. Now, in this state, if an abnormal operation occurs due to an excessive rise in the coil temperature of the motor for the first compressor 1, for example, the first compressor protection thermostat (CTP1)
The opening operation is detected by the abnormal location detection means 26,
The control means 27 first controls the lighting of the above-mentioned front element.
After LED3, LED10, and LED13 are controlled to turn off, the 16th abnormality display element LED15 is controlled to blink as shown in FIG. 5 to display the abnormal operation state, and in this state, the The lighting of the third display element LED2 is controlled to indicate an excessive rise in the coil temperature of the motor for the first compressor 1. Here, when abnormal operation occurs, the abnormal state display element LED 15 flashes to indicate this abnormal state, so it is easy to understand that the abnormal location is displayed during abnormal operation, and this abnormal location display is As shown in Table 2, each display element LED0
~The abnormal location is assigned to LED13, and each display element LED0 to LED13 corresponds to the abnormal location on a 1:1 basis, and this abnormal location display is a lighting display, so the abnormal location is Even when as many as 14 types of displays are set, abnormalities can be easily and immediately identified. In addition, in the above embodiment, the abnormality display element LED1
5 is configured with a light that turns off during normal operation, but even if it is configured with a light that lights up to indicate the operating status, the point is that it serves both as an operating status display during normal operation and an abnormal location display during abnormal operation. What is necessary is just to consist of something other than a display element. In addition, the display element LED1~
The LED 3 and the LED 15 may be composed of liquid crystal elements instead of light emitting diodes. (Effects of the Invention) As explained above, according to the display device for a refrigerator of the present invention, when an abnormal operation occurs, the display element that was lit to indicate the normal operating state immediately before is turned off, and the display element at the time of abnormality is turned off. While flashing, the abnormal location is displayed by lighting up the display element for displaying the operating status that has been assigned in advance to correspond to the abnormal location, so when a large number of abnormal location displays are set, However, the abnormal location can be easily and immediately identified, and the display function of the abnormal location can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic refrigerant piping system diagram, FIG. 2 is a control circuit diagram of the operating status and abnormal location display system, and FIG. 3 is a flowchart diagram showing the operation of the control circuit. FIG. 4 and FIG. 5 are diagrams showing an example of an operating state display during normal operation and an example of an abnormal location display during abnormal operation, respectively. 15...control circuit, 20...indicator, LED0
~LED13...display element, LED15...abnormality display element, 25...operating state detection means, 26...
Abnormal location detection means, 27... control means.

Claims (1)

[Claims] 1. Multiple display elements that display pre-assigned operating conditions during normal operation and display pre-assigned abnormal locations during abnormal operation through lighting operations.
LED0 to LED13, an abnormality display element LED15 that flashes to indicate abnormal operation, and an operating state detection means 25 that detects various operating states during normal operation.
Abnormal location detection means 26 detects an abnormal location at the time of abnormal operation, receives the outputs of both the detection means 25 and 26, and lights display elements LED0 to LED13 corresponding to the current operating state during normal operation, while
When an abnormal operation occurs, the display element that lights and displays the operating state during normal operation is turned off, and at the same time, the display element LED15 is made to blink and display the above-mentioned abnormality display element LED0 to LED corresponding to the abnormal location.
1. A display device for a refrigerator, characterized in that the display device comprises a control means 27 for lighting and displaying 13.