JPS62153672A - Display unit for refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a display S4i system for refrigerators that uses a display element to display the current operating status of a cold 211 refrigerator and the location of an abnormality in the event of an abnormal operation. Regarding improvements.

(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 this for both purposes, thereby improving economical efficiency, and to further reduce the size by making the installation space of the Ill device 11 better.

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 for displaying the room temperature that is displaying V temperature will blink, and when there is an abnormality in the signal transmission system, it will turn on and off the air conditioner.
Each display element for displaying the heating operation is made to blink alternately to alert those present to the abnormal operation.

(Problems to be Solved by the Invention) However, with the above-mentioned conventional devices, the temperature indicator that blinks when there is a slight abnormality differs depending on the room temperature situation at that time, and the signal transmission system is different. Sometimes the operation display elements for both cooling and heating flash alternately, and the response of the display element that should display this in response to an abnormality in operation is 1:
It is complicated, and therefore has the disadvantage that it is difficult to easily distinguish the display contents, especially when setting a large number of abnormal point displays.

The present invention has been made in view of these points, and its purpose 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. By assigning this to each element and displaying the display element corresponding to the abnormal location while displaying the other display element when there is an abnormality in operation, it is possible to display the abnormal location when setting a large number of abnormal location displays. The object of the present invention is to easily distinguish the display contents and immediately grasp the abnormal location, thereby improving the display function of the abnormal location.

(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention, as shown in FIG. 2 and FIG. A plurality of display elements (LEDO) that display abnormalities at the time ~ (LE D 'l
3), and an abnormality display element (LED 15) that indicates when the operation is abnormal.In addition, an operation state detection means (2) for detecting various operating conditions during normal operation is installed.
5), an abnormal location detection means (26) for detecting an abnormal location during abnormal operation, and a display element that receives the outputs of both the detection means (25) and (26>) and corresponds to the current operating state during normal operation. (LEDO to LED13), and when the operation is abnormal, the abnormality display element (LED15) is displayed, and at the same time, the display element (LEDO) corresponding to the abnormality is displayed.
The control means (27) for displaying the LED 13) is provided.

(Function) As described above, in the present invention, during normal operation, the abnormality display element (LED15) does not display, and in this state, the display elements (LEDO to LED13) corresponding to the current operating state are activated by the control means (27). Since the display 11 is controlled, the current operating state can be easily grasped.

In addition, when an abnormality in operation occurs, the display elements (LEDO~(LEDl3)) displaying the operation status are switched to the control means (
27), and the abnormality display element (LEDl 5) is used for display control to display the abnormal operation state, and in this state, the display element (LE5) corresponding to the abnormal location is
DO~l-E D 13) is ll1ll + sum means (
27) to display abnormal locations. Here, the display of the abnormality by the display elements (LED0 to LED13) is a display of the abnormality which has been assigned in advance, and since each display element (LEDO) to (LEDl3) and the abnormality correspond to each other, this Even if a large number of abnormal point displays are set, the abnormal point can be identified immediately.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows the schematic configuration of the refrigerant piping system of a multi-type separate air conditioning system, where (△) is the outdoor unit, (B), (
C) is two indoor units arranged in different rooms, and the outdoor unit (A> has a first and second compressor (1),
(2) and an outdoor heat exchanger (3) having an outdoor) air fan (3a), and each indoor unit (B
) and (C) respectively include a first heat exchanger section (4a),
<5a) and the second heat exchanger section (4b), (5b
) Toni was trained for two minutes, and one blower fan (4c),
Internal heat exchangers (4) and (5) having (5C) are built in. And each guided heat exchanger (4).

The first heat exchanger sections (4a) and (5a) of (5) are connected to the first compression section (1) of the outdoor unit (Δ) and the outdoor heat exchanger through the i17 medium piping (6)... (3) are connected in series to form the first refrigerant circulation circuit (7), and the second heat exchanger sections (4b) and (5b) are similarly connected to the refrigerant piping (8)... The second compressor (2) of the outdoor unit (△)
) and the outdoor heat exchanger (3) to form a second refrigerant circulation circuit (9).

A control circuit (15) containing a CPl for controlling the operation of the air conditioner and displaying its operating status is built in the outdoor unit (A>). The control circuit (1
5) includes the first compressor (1) as shown in FIG.
and an inverter (1G) that alternately controls the capacity of the second compressor (2), for example every predetermined operating time, and one indoor IN
A first room temperature sensor (THA) detects the temperature in the room where the indoor unit (B) is installed, and a second room temperature sensor (Tl (e ) are connected to each other so as to be able to send and receive signals, and both room temperature sensors (T
HA), 1 from (TI-1s)? Depending on the deviation between the actual room temperature and the room temperature target ta (room temperature set value) in each room, one compressor tIA (1) or (2) is controlled to operate/stop at a fixed capacity using a commercial power source, and the other compressor is controlled to operate/stop at a fixed capacity. (
2) or (1) by controlling the capacity with an inverter (16),
The air conditioning capacity is adjusted stepwise in 10 steps from "0" to "9".

The control circuit (15) also includes display elements (L[EDO) to (LEDl 5), (LEDl
O') to (LED15') indicator (20
) are connected to be able to send and receive signals by optical transmission, and each display element (LE[)O), (LEDO') to (LED1
5) The display contents of the operating status of (LED15'>
The allocation is set in advance as shown in the table.

Table 1 Furthermore, the control circuit (15) includes each compressor (1),
(2) and the refrigerant circulation systems (7) and (9), the first compressor (1) and second compressor (2) each closes when an overcurrent is applied to each drive motor. and overflow IJL/-(OCl) for the second compressor motor, (
OC2) and 1st. The coils of the motors for the second compressors (1) and (2) respectively open at 4 o'clock when the temperature exceeds the first. A second compressor protection thermostat (CTPl), (CTP2) and a first compressor protection thermostat that opens when the high pressure from each compressor (1), (2) increases excessively. A second high pressure switch (HPSL).

(HPS2) and the first and second indoor fan protection thermostats that close when the coil temperature of the drive motor for the indoor ventilation fans (4c) and (5c) in each indoor eil (B) and (C) rises excessively. (Fl), (F2), an outdoor fan overcurrent relay (OC3) that closes when an overcurrent is applied to the drive motor of the outdoor air fan 1 (3a), and an outdoor heat exchanger (OC3). 3), a defrost detection relay (21) that detects when the defrost is running and closes, and a heating high-pressure control relay (21) that detects when the high pressure of the refrigerant is controlled in the heating mode and closes.
22) and a cooling low pressure control relay (23) that closes upon detection of refrigerant low pressure control 2I1 in the cooling operation state, and are connected so as to be able to send and receive signals, and also to be able to receive and receive signals. Signal and droop (No. 5 can be input.

Of the display device (20), the first to fourteen display elements (LE) belonging to the first cold tS and circulation circuit (7) are
DO) to (LEDl3) are pre-allocated and set to light up when the above-mentioned relays and sensors are closed, that is, when there is an abnormal operation, and display the 14 types of abnormal operation contents shown in Table 2, and the 16th display The element (LEDl 5) is used to indicate abnormal operation.

Table 2 Accordingly, by the 14 display elements (LEDO) to (LED13) that are connected to the first refrigerant circulation circuit (7), i'
+11° C. The double v1. negative number 116 [I's display element (
t-E D15) J: constitutes an abnormality display element that displays an abnormal operation.

Next, the operation of the '4i control circuit (15) will be explained based on the flowchart shown in FIG. Start and step 1 at $1. 2nd room temperature sensor (T) 4A), <TH
After inputting each actual room temperature signal from step S), step S
In step 2, the current operating mode is determined based on the actual V temperature values. ′! t, that is, the cooling or heating operation mode and the capacity value of the compressor (1) or (2), that is, the inverter (16
The compressor on the capacity control side to be selected is determined based on the frequency setting signal value for > and the integration of the internal timer.

Thereafter, in step S3, a trip signal is sent to the relay or inverter (16) due to overcurrent or the like.

Determine whether or not there is an abnormal input of the drooping signal, and select N with no abnormal input.
In the case of o, display elements (LEDO), (LEDO') to (LEDO') corresponding to the current driving mode are selected in step S4.
15), (LED15'> lighting control is performed, and the process returns to step S1. On the other hand, in the case of YES with an abnormal input, the 16th display belonging to the first refrigerant circulation circuit (7) is turned on in step S5. At the same time, the display element (LED 5) corresponding to the abnormal operation point is controlled to blink.
O) to (LEDl3) are controlled to light up, and the process returns to step SI.

Therefore, in the operation flow of the control circuit (15) shown in FIG. The compressor (1) constitutes an operating state detection means (25) configured to detect the operating state, and in step S3.

(2) Abnormal location detection means (2G) is configured to detect an abnormal location at the time of abnormal operation such as overcurrent or abnormally high pressure of refrigerant. Also, step 84.

85, during normal operation, the display elements (LEDO) to (LEDl3) corresponding to the current operating state are turned on, while during abnormal operation, the 16th abnormality display element belonging to the first refrigerant circulation circuit (7) is turned on. At the same time, the display element (LEDO) corresponding to the abnormal location flashes the LED15).
~ (LEDl3) +? R41l with λ light
la means (27).

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
Compression F! 4 (1) Capacity ff1l! r+IIl] and the total capacity is at the stage of "3", this operating state is detected by the operating state detection means (25), and Ill 12
As shown in FIG. 4, the 3rd. 1st
0. Thirteenth display element (LED3), (LEDlo),
Only (LEDl3) is controlled to light up to display the current operating state.

Now, in this state, an operational abnormality occurs, for example, due to an excessive rise in the coil field of chamber 1 of the motor for the first compressor (1).
In the case of JJJ, the opening operation of the first compressor protection thermometer (CTPL) is detected by the abnormal location detection means (26), and IIJ
The In means (27) first turns on the lighting display element (
LED3), (LEDlo).

After (LEDl3) is controlled to turn off, the 16th abnormality display element (LEDI5) is controlled to blink as shown in Fig. 5 to display the abnormal operation state, and in this state corresponds to the above abnormal operation state. The third display element (LED2) is controlled to light up to display the excess temperature of the coil of the motor for the first pressure TALFI(1).

Here, when the operation is abnormal, an abnormality display element (LE
DI5) blinks to indicate this abnormal state, so it is easy to understand that the abnormality is displayed at all times, and this abnormality is displayed in advance by each display element (as shown in Table 2). The abnormal location is assigned and set for each display element (LEDo) ~ (LEDI3), and each display element (LEDO) ~
(LEDI3) and the abnormal location correspond to 1=1, so even when as many as 14 abnormal location displays are set, the abnormal location can be easily and immediately identified. .

In the above embodiment, the abnormality display element (LEDI 5) was configured to turn off during normal operation, but it may also be configured to turn on to indicate the operating status. Status! 2! It is sufficient to use something other than a display element that serves both as a display and as an abnormal location display in case of an abnormal operation. In addition, display elements (LEDI) to (LED3), (LED
I5) may be constituted by a liquid crystal element instead of a light emitting diode.

(Effects of the Invention) As explained above, according to the display device for a refrigerator of the present invention, during abnormal operation, while displaying the abnormal state display element,
The abnormal location is displayed using a display element that is assigned in advance to the abnormal location and also serves as an operating status display during normal operation, so even if a large number of abnormal location displays are set, the The 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 *m example of the present invention; Fig. 1 is a schematic refrigerant piping system diagram, Fig. 2 is a control circuit diagram of the operating status and normal point display system, and Fig. 3 shows the operation of the control 211 port. The flowchart diagram, FIG. 4, and FIG. 5 are diagrams each showing an example of an operating state display during normal operation and an abnormal location display during abnormal operation. (15)...Control circuit, (20)...Display device, (L
EDO) ~ (LEDI3)...Display element, (LEDI
5)... Abnormality display element, (25)... Operating state detection means, (26)... Abnormal location detection means, (27).
...111 suburban means. Patent applicant: Daikin Industries, Ltd. 2. '- Representative Patent Attorney 1) Hiro'Figure 4
5th F-1 Figure 3

Claims (1)

[Claims] (1) Multiple display elements assigned in advance to display the operating status during normal operation and to display abnormal locations during abnormal operation.
LED0) to (LED13), an abnormality display element (LED15) that indicates abnormal operation, an operating state detection means (25) that detects various operating conditions during normal operation, and detects abnormal locations during abnormal operation. An abnormality detection means (26) that receives the outputs of both the detection means (25) and (26), and displays a display element (LED) corresponding to the current operating state during normal operation.
0 to LED13), and when the operation is abnormal, the above-mentioned abnormality display element (LED15) is displayed, and at the same time, the display element corresponding to the abnormal location (LED0 to LED13) is displayed.
A display device for a refrigerator, comprising a control means (27) for displaying.