JP3187268B2 - Control device for air conditioner - Google Patents

Abstract

PURPOSE: To provide a controller for an air conditioning equipment which achieves higher reliability in restarting corresponding to difference in the machine type to protect excessive load during the heating of a compressor concerning the control of an outdoor fan motor of a controller for the air conditioning equipment. CONSTITUTION: In a controller for an air conditioning equipment which is made up of a room unit 1 having a temperature sensor 2 of a room heat exchanger, a room fan motor 3, a memory for storing a protecting operation temperature of an outdoor fan motor, a protecting operation temperature C of a compressor and a protection releasing temperature, a timer 4b, a room control section 4 and the like and an outdoor unit 6 having a compressor 7, an outdoor fan motor 9, an outdoor control section 11, a four-way valve 10 and the like, the room unit is provided with a memory section 4a which stores a value of a delay time T of restarting the outdoor fan motor and a setting means 5. When a detection temperature of a room heat exchanger exceeds C, after the restarting of the compressor, the starting of the outdoor fan motor is delayed by T.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner, and more particularly to an outdoor fan motor control for overload protection during heating.

[0002]

2. Description of the Related Art Conventionally, overload protection at the time of heating of a control device of an air conditioner constituted by an indoor unit 1 and an outdoor unit 6 shown in a block diagram of FIG. Had been In this case, the cancellation of the overload protection during heating restarts the compressor 7 and also restarts the outdoor fan motor 9. However, when the load is large, the temperature detected by the temperature sensor 2 of the indoor heat exchanger has a value delayed from the temperature of the indoor unit heat exchanger as shown in FIG.
For this reason, the stop time of the outdoor fan motor is delayed, and the temperature detected by the temperature sensor of the indoor heat exchanger becomes equal to or higher than the protection operation temperature of the compressor without reducing the load, and the compressor is stopped again. As a result, the compressor runs,
Repeated stoppages have caused a problem in the durability of the compressor.
Further, the protection operation temperature of the outdoor fan motor, the protection operation temperature of the compressor, the protection release temperature, the detection temperature of the temperature sensor 2 of the indoor heat exchanger, and the delay time of the temperature of the indoor heat exchanger depend on the model. There are different problems.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and the reliability of restarting a compressor has been improved by releasing overload protection during heating. It is an object of the present invention to provide a control device for an air conditioner that also responds to the differences.

[0004]

In order to achieve the above object, an indoor room having a temperature sensor for detecting the temperature of an indoor heat exchanger and an indoor control unit for controlling an indoor fan motor and the like based on the detection signal. Machine, transmitting and receiving with the indoor control unit,
A compressor, an outdoor fan motor, and an outdoor unit having an outdoor control unit for driving and controlling a four-way valve and the like, the protection operation temperature of the outdoor fan motor, the protection operation temperature of the compressor, and the protection release temperature. Respectively, and a timer in the indoor control unit, and compares the temperature values thereof and the detected temperature value of the indoor heat exchanger temperature sensor to control the compressor and the outdoor fan motor. In the control device of the air conditioner, the indoor control unit is provided with a memory unit that stores a delay time of restart of the outdoor fan motor,
Restart of the outdoor fan motor, when the temperature detected by the indoor heat exchanger temperature sensor exceeds the preset protection release temperature, after the compressor is restarted, the memory set in advance in the memory unit It is characterized by being delayed by the timer by a delay time. The delay time setting means of the timer includes a plurality of switches or jumpers. Further, the protection release temperature setting means is constituted by a plurality of switches or jumper wires. Alternatively, the protection operation temperature setting means of the outdoor fan motor is set by a plurality of switches or jumper wires. Alternatively, the protection operating temperature setting means of the compressor is set by a plurality of switches or jumper wires.

[0005]

According to the above construction, an indoor unit having a temperature sensor for detecting the temperature of the indoor heat exchanger, an indoor control unit for controlling an indoor fan motor and the like based on the detection signal, and the indoor control unit Transmitted and received, a compressor, an outdoor fan motor, an outdoor unit having an outdoor control unit for driving and controlling a four-way valve and the like, the protection operation temperature of the outdoor fan motor, the protection operation temperature of the compressor, , A memory for storing the protection release temperature, and a timer in the indoor control unit, and compares those temperature values with the detected temperature value of the indoor heat exchanger temperature sensor to determine the compressor and the outdoor fan. In the control device of the air conditioner for controlling the motor, the indoor control unit is provided with a memory unit for storing a restart delay time of the outdoor fan motor, and the restart of the outdoor fan motor is performed by the indoor heat exchange. When the temperature detected by the temperature sensor exceeds the preset protection release temperature, after the compressor is restarted, it is delayed by the timer by the delay time set in the memory unit in advance, The delay time setting means of the timer is configured by a plurality of switches or jumpers, and
The protection release temperature setting means may be configured by a plurality of switches or jumper wires, or the protection operation temperature setting means of the outdoor fan motor may be configured by a plurality of switches or jumper wires. Alternatively, since the protection operating temperature setting means of the compressor is set by a plurality of switches or jumper wires, the compressor is prevented from being repeatedly operated and stopped at short intervals. Can be
In addition, it can cope with differences between models.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same parts as in the conventional example. FIG. 1 is a block diagram showing an embodiment of a control device for an air conditioner according to the present invention. The control device of the air conditioner includes an indoor unit 1 and an outdoor unit 6. Then, the indoor unit calculates the respective values of the indoor heat exchanger temperature sensor 2, the protection operation temperature F of the indoor fan motor 3, and the outdoor fan motor, the protection operation temperature C of the compressor, and the protection release temperature R. It includes a memory for storing, has a timer 4b, and has an indoor control unit 4 and the like for controlling them. The outdoor unit also controls the compressor 7, the outdoor fan motor 9, the four-way valve 10, and the outdoor fan motor 9 and the four-way valve 10 based on a control signal from the indoor control unit, and transmits and receives the outdoor control unit to and from the indoor control unit. 11 and the like. Further, in order to protect the overload during heating according to the present invention, the indoor unit is provided with a memory unit 4a for storing a value of a delay time T for restarting the outdoor fan motor. Further, the restart of the outdoor fan motor stopped by the control of the overload protection is restarted when the detected temperature of the indoor heat exchanger temperature sensor exceeds the preset protection release temperature C. After the restart, the outdoor fan motor is restarted after being delayed by the timer by the delay time T set in the memory unit in advance.

On the other hand, the operation of the control device for an air conditioner according to the present invention when the outdoor fan motor is restarted will be described with reference to the flowchart shown in FIG. The indoor control unit first determines whether or not the compressor is OFF by overload protection during heating (S1). If yes
Then, it is determined whether or not the restart prevention time is 3 minutes (S
Enter 2), and if NO, the outdoor fan motor
It is determined whether it is FF (S3). Next, if the outdoor fan motor is OFF and YES, the process proceeds to a determination (S4) as to whether or not the detected temperature S of the indoor heat exchanger temperature sensor is lower than the protection release temperature R. It is determined whether the detected temperature S of the indoor heat exchanger temperature sensor is higher than the protection operation temperature F of the outdoor fan motor (S5). Here, if YES, the outdoor fan motor is turned off and the process returns to the start point. If NO, the process returns to the start point. On the other hand, if it is determined whether or not the restart prevention time is 3 minutes (S2), then YES is determined.
If so, the process returns to the starting point. If NO, the process proceeds to a determination (S6) as to whether the detected temperature S of the indoor heat exchanger temperature sensor is lower than the protection release temperature R. Here, if YES, the compressor is turned ON and the timer is started. If NO, the process returns to the starting point. On the other hand, it is determined whether or not the detected temperature S of the indoor heat exchanger temperature sensor is lower than the protection release temperature R (S
In 4), if YES, a determination is made as to whether the timer has exceeded the delay time T (S7), and this determination is repeated until the delay time T has been exceeded. It turns on, returns to the starting point, and if NO, enters into a judgment (S8) as to whether or not the detected temperature S of the indoor heat exchanger temperature sensor is higher than the protection operation temperature C of the compressor. Here, if YES, the compressor is turned off and the process returns to the starting point, and if NO,
Return to the starting point. With the above operation, after the compressor is restarted, the outdoor fan motor is restarted with a delay of the delay time T set in the memory unit in advance. As a result, as shown in FIG. 3, the heat exchanger temperature of the indoor unit gradually rises, and the delay time between the temperature and the temperature detected by the indoor heat exchanger temperature sensor is reduced. For this reason, while the compressor does not restart at short intervals, the temperature range in which the heating operation can be performed can be widened.

Further, means for setting the set temperatures R, C, F and the delay time T of the timer are provided in the indoor unit, and are connected to a predetermined input terminal of the indoor control unit. Then, the setting means 5 for setting the delay time T of the timer is a plurality of switches or jumpers. The setting means 5 of the protection release temperature R is a plurality of switches or jumpers. Alternatively, the protection operating temperature setting means 5 of the compressor is a plurality of switches or jumper wires. Alternatively, the setting means 5 of the protection operation temperature F of the outdoor fan motor is a plurality of switches or jumper wires. With these switches or jumper wires, an optimum value can be set for each model of the control device of the air conditioner.

[0009]

As described above, according to the present invention, an indoor unit having a temperature sensor for detecting the temperature of an indoor heat exchanger and an indoor control unit for controlling an indoor fan motor and the like based on the detection signal is provided. Transmitting and receiving with the indoor control unit, a compressor,
An outdoor fan motor and an outdoor unit having an outdoor control unit that drives and controls a four-way valve and the like, the protection operation temperature of the outdoor fan motor and the protection operation temperature of the compressor,
The indoor control unit includes a memory for storing the protection release temperature and a timer in the indoor control unit, and compares the temperature value with the detected temperature value of the indoor heat exchanger temperature sensor to determine whether the compressor and the outdoor fan motor are used. In the control device of the air conditioner, the indoor control unit is provided with a memory unit for storing a restart delay time of the outdoor fan motor, and restarting the outdoor fan motor is performed by the indoor heat exchanger temperature sensor. When the detected temperature exceeds the preset protection release temperature, after the compressor is restarted, it is delayed by the timer by the delay time set in the memory unit in advance, and The means for setting the delay time of the timer includes a plurality of switches or jumpers, and the means for setting the protection release temperature includes a plurality of switches or In such a manner that by the jumper line,
Alternatively, the protection operation temperature setting means of the outdoor fan motor may be set by a plurality of switches or jumper wires, or the protection operation temperature setting means of the compressor may include a plurality of switches or , The jumper line is used to prevent the compressor from being repeatedly operated and stopped at short intervals, and it is possible to cope with differences between models. As a result, it is possible to provide a control device for an air conditioner with improved reliability and a widened temperature range in which a heating operation can be performed, corresponding to each model.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a control device for an air conditioner according to the present invention.

FIG. 2 is a flowchart showing one embodiment of a control device for an air conditioner according to the present invention.

FIG. 3 is a graph showing the temperature of the indoor heat exchanger of the control device for an air conditioner according to the present invention and the time detected by the heat exchanger temperature sensor with respect to time.

FIG. 4 is a block diagram showing one embodiment of a conventional control device for an air conditioner.

FIG. 5 is a flowchart showing an embodiment of a control device for a conventional air conditioner.

FIG. 6 shows a graph of the temperature of the indoor heat exchanger of the control device of the conventional air conditioner and the time of the temperature detected by the heat exchanger temperature sensor with respect to time.

[Explanation of symbols]

 Reference Signs List 1 indoor unit 2 indoor heat exchanger temperature sensor 3 indoor fan motor 4 indoor control unit 4a memory unit 4b timer 5 setting means 6 outdoor unit 7 compressor 9 outdoor fan motor 10 four-way valve 11 outdoor control unit

Claims (5)

(57) [Claims] An indoor unit having a temperature sensor for detecting a temperature of an indoor heat exchanger, an indoor control unit for controlling an indoor fan motor and the like based on the detection signal, and transmitting and receiving to and from the indoor control unit, And an outdoor fan motor, and an outdoor unit having an outdoor control unit that drives and controls a four-way valve and the like, and the protection operation temperature of the outdoor fan motor, the protection operation temperature of the compressor, and the protection release temperature. An air for controlling the compressor and the outdoor fan motor by having a memory for storing each and a timer in the indoor control unit, comparing the temperature values thereof and the detected temperature values of the indoor heat exchanger temperature sensor. In the control device for the harmony device, the indoor control unit is provided with a memory unit for storing a restart delay time of the outdoor fan motor, and the restart of the outdoor fan motor is detected by the detection of the indoor heat exchanger temperature sensor. When the output temperature exceeds the preset protection release temperature, after the compressor is restarted, the air is delayed by the timer by the delay time set in the memory unit in advance. Harmonizer control device. 2. A method for setting a delay time of the timer, comprising:
The control device for an air conditioner according to claim 1, comprising a plurality of switches or jumper wires. 3. The control device for an air conditioner according to claim 1, wherein the setting means for setting the protection release temperature includes a plurality of switches or jumpers. 4. The control device for an air conditioner according to claim 1, wherein said protection operation temperature setting means of said outdoor fan motor is set by a plurality of switches or jumper wires. 5. The control device for an air conditioner according to claim 1, wherein said protection operation temperature setting means of said compressor is set by a plurality of switches or jumper wires.