JPS6146835A - Operation displaying method in air conditioning machine - Google Patents

Abstract

PURPOSE:To provide a simple structure and reduce a fixing space by a method wherein when a preheating operation and a defrosting operation are performed, a lighting interval of an operation display lamp is varied and displayed. CONSTITUTION:When an operation switch 10 is depressed, a compressor 1, four-way valve 2 and outdoor blower 7 are turned on and an indoor heat exchanger sensor TH2 is supervised. During this operation, an operation display LED 9 is illuminated under an interval of preheating mode, and when an indoor heat exchanger sensor TH2 is increased more than the set temperature, the indoor blower 4 is turned on, the operation display LED 9 is lit and a normal operation is performed. When an outdoor heat exchanger sensor TH1 is lower than the set temperature, a defrosting operation is performed and the operation display LED 9 is illuminated with a defrosting interval. A defrosting completion temperature set by OUT2 port is supervised by the sensor TH1 and in turn if the temperature is higher than the set temperature, the preheating operation is performed. With this arrangement, it is possible to display it with one operation lamp, to simplify the structure and reduce the space for the structure.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a display device during defrosting operation in an air conditioner that cools or heats a room.

Conventional configuration and its problems Conventionally, this type of air conditioner only had a defrost operation lamp.
During defrosting operation, the defrosting operation lamp was lit to indicate defrosting operation.

However, this configuration requires a defrost operation lamp and a circuit to control the defrost operation lamp in addition to the heating operation lamp.
There were problems such as an increase in material costs and an increase in installation space.

In addition, conventionally, when starting operation or returning from defrosting operation to normal operation, the indoor blower was stopped or operated at low speed to prevent cold air. There was a control that caused the operation indicator lamp to flash during defrosting operation control (hereinafter referred to as preheating operation), but in this case, if the same operation indicator lamp was blinking in the same way as the display during defrosting operation, it would not be possible to control the preheating operation. The present invention solves the above-mentioned problems of the conventional technology, and it is possible to display the defrosting operation without increasing the material cost or the installation space. It is intended for all purposes.

Structure of the Invention To achieve this object, the present invention includes a defrost control device that performs a defrost operation when an outdoor heat exchanger enters a defrosting condition and sends a defrost signal, and a defrost control device that receives and receives the defrost signal. and an operation display device that flashes an operation indicator lamp at different intervals than during preheating operation.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

First, the refrigeration cycle of an air conditioner will be explained with reference to FIG.

In the figure, 1 is a compressor and 2 is a four-way valve, which communicates with the solid line side when turned on. 3 is an indoor heat exchanger, 4 is an indoor blower, 5
1 is a capillary tube, 6 is an outdoor heat exchanger, 7 is an outdoor blower, and 11 is a control circuit. During normal heating operation, refrigerant flows by the compressor 1 as shown by the solid arrow, and the indoor blower 4 and Outdoor fan 7 is turned on. During the preheating operation, the indoor fan 4 is stopped, and is turned on after waiting for the temperature of the indoor heat exchanger to rise. During defrosting operation, four-way valve 2
is switched, the refrigerant flows as shown by the broken line arrow 9, the indoor blower 4 is stopped to prevent cold air, and the outdoor blower 7 is stopped to defrost. During cooling operation, the refrigerant flows as shown by the broken line.
Both indoor fan 4 and outdoor fan 7 are turned on. NaP
, (THI) (TH2) will be explained with reference to FIG.

Next, a control circuit related to the defrosting operation of the air conditioner will be explained with reference to FIG. Here, the same parts as in FIG. 1 are given the same numbers and the explanation is omitted.

In the figure, 8 is a microcomputer, 9 is an operation display LED, (THI) is a sensor for detecting frost formation and defrosting completion (hereinafter referred to as outdoor heat exchange sensor), and 6 is an outdoor heat exchanger.
It is attached to the hairbin part of. (TH2) is a sensor for detecting release of preheating operation (hereinafter referred to as indoor heat exchange sensor)
It is attached to the hairbin part of the indoor heat exchanger 3. Reference numeral 10 is an operation switch, which opens when turned on. In addition, (oufl) in the microcomputer 8 is a board for setting the frost detection temperature, (ouf2) is a board for setting the defrosting end temperature), (ouf3), (ouf4), [ouf5]
, (ouf6) are compressor 1 four-way valve 2, indoor blower 4, respectively.
, an output port (ouf6) of the outdoor blower 7 is an output port of the operation display LED 9, (INI) is an input port for frosting and defrosting signals, and (IN2) is an input port for a preheating operation end signal.

Next, the preheating operation at the start of the heating operation will be explained with reference to the flowchart shown in FIG.

When the operation switch 10 is pressed, the compressor 1, four-way valve 2, and outdoor fan 7 are turned on, and the indoor heat exchange sensor (TH2)' is turned on.
to be monitored. Meanwhile, the operation display LED 9 is repeatedly flashing at intervals of the preheating mode. If the indoor heat exchange sensor [TH2] exceeds the set temperature, the indoor fan 4'f
t: ONl, the operation display LED 9 lights up and normal operation begins.

Next, the defrosting operation mode will be explained with reference to the flowchart shown in FIG.

During normal operation, the defrosting start temperature set on the (oufl) boat is constantly monitored by the outdoor heat exchange sensor (THl), and the operation indicator LEDQU is lit. Therefore, when the outdoor heat exchanger sensor (THl) becomes lower than the set temperature, the defrosting operation is started, and the operation display LED 9 blinks at the defrosting interval. (ouf2) The defrosting end temperature set on the boat is constantly monitored by an outdoor heat exchange sensor (THI).

When the outdoor heat exchanger sensor (THl) reaches the defrosting end temperature or higher, the preheating operation starts, and until the indoor heat exchanger sensor (TH2) detects the preheating end temperature, the indoor fan 4 stops and the operation display LED 9 indicates the preheating operation. Flashing at intervals.

When the indoor heat exchanger sensor (TH2) reaches the preheating end temperature or higher, normal operation is resumed and the operation display LED 9 lights up.

Incidentally, FIG. 5 is a flowchart of the subroutine of FIGS. 3 and 4.

Therefore, normal operation, defrosting operation, and preheating operation can be displayed using one operation indicator lamp.

In this embodiment, a thermistor was used to detect frost formation, defrost completion, and preheating completion, but it is also possible to detect pressure with a pressure switch and detect current with a CT lance, and configure an electronic circuit according to the signals. If so, it can be implemented similarly.

Effects of the Invention As described above, the present invention can display three types of operation, normal operation, defrosting operation, and preheating operation, with one operation indicator lamp, thereby reducing the material cost of the operation indicator lamp and the display section attached to it. This has the effect of reducing the number of parts and reducing the defective rate.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a refrigeration cycle equipped with an operation display device and an operation display device showing the basic control of the present invention, FIG. 2 is an electronic circuit diagram including the operation control device and a microconbeater of the operation display device, and FIG. 4 is a flowchart showing control during preheating operation, FIG. 4 is a flowchart showing control during defrosting operation, and FIG. 5 is a flowchart showing the subroutine of FIGS. 3 and 4. 6...Outdoor heat exchanger, 9...Operation display LED
(operation display lamp), 11...operation display device. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4

Claims (1)

[Claims] It is capable of cooling and heating operation, and is equipped with an operation control device that defrosts the frost that adheres to the outdoor heat exchanger during heating operation, and changes the blinking interval of the operation indicator lamp during preheating operation and defrosting operation. How to display the air conditioner operation.