JPH031033A - Control device for air conditioner - Google Patents

Abstract

PURPOSE:To enable substantial control of indoor air and to enable control of prevention of the occurrence of the overload of a compressor by a method wherein, through control of a louver drive motor in prior to control of an indoor fan and the compressor, the opening of an indoor louver is controlled. CONSTITUTION:A relay 7b is brought into an ON-state so that an outdoor fan 2 is brought into an OFF-state from an ON-state, heretofore kept, according to the increase of a input current value detected by a current detector 11. With this state, operation is effected for a while, and when an input current value is yet increased, the opening of a louver 20 is controlled so that the opening area of a discharge port 19 of the louver 20 is increased. The opening of the louver 20 is regulated in a way that based on a detecting value from a louver angle detector 13, a relay 10 for driving a louver is closed to operate a louver drive motor 5. This constitution increases an airflow discharged through a discharge port 19 even when the number of revolutions of an indoor fan 4 is not changed and increases an amount of heat emitted at an indoor heat exchanger 18, and prevents the increase of an input current.

Description

DETAILED DESCRIPTION OF THE INVENTION Objective 1 of the Invention (Industrial Field of Application) The present invention relates to a pressure f1m overload prevention control device for an air conditioner compressor, and particularly to a pressure f1m overload prevention control device for an air conditioner compressor. This invention relates to an air conditioner control device that controls not only internal and external fans but also the opening degree of an indoor louver.

(Conventional technology) Conventionally, for example, during a heating sleep operation (when the indoor louver is in the horizontal cooling automatic operation position and the indoor fan air volume is small), the cycle absorbs more heat than radiates heat, and the compressor inevitably runs into overload mode. state, the input current to the pressure 8tR increases,
It becomes easier to enter compressor overload prevention control. In this compressor overload prevention control, the outdoor fan is turned OFF, and if the current value still increases, the indoor fan is turned HIGH, and if the overload condition continues, the compressor is stopped.

(Problem to be Solved by the Invention) However, if the fan is suddenly rotated at high speed for compressor overload prevention control while the indoor fan is rotating at a low speed, the air given to the user will be suddenly reduced. There is a problem that the noise caused by the fan becomes louder as the number of fans increases, which is undesirable for the user, especially when the heating is in sleep mode6.
In addition, during normal heating or cooling operation, if the balance between heat absorption and heat radiation between the indoor and outdoor sides is disrupted due to changes in outside temperature, and the compressor current increases, the air volume of the indoor and outdoor fans can be switched. Although overload prevention control is performed to prevent the input current to the compressor from increasing, it is not desirable for the air volume to change frequently for overload prevention control.

The present invention was made in consideration of the above circumstances, and when the compressor S compressor becomes overloaded during operation, the input current to the compressor reaches the set value without changing the air volume of the indoor fan. An object of the present invention is to provide an air conditioner control device that can perform compressor overload prevention control so as not to exceed the compressor overload.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a control device for an air conditioner having a louver drive motor for opening and closing an indoor louver in an indoor unit. is equipped with pressure IaR overload prevention control means that detects the input current of the controller and, when the current value exceeds a predetermined value, controls the outdoor fan and controls the louver drive motor to adjust the opening degree of the indoor louver. It is something.

(According to the above configuration, when performing pressure fI machine overload prevention control, the air volume of the outdoor fan is switched, and if the compressor is still overloaded due to a large amount of heat absorption, the indoor fan and compressor are controlled. By controlling the louver drive motor to control the opening degree of the indoor louver before starting the operation, it is possible to substantially control the indoor air volume and to control the compressor overload prevention TIJ of the pressure tmR.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 shows the electrical circuits of various devices of the air conditioner according to the present invention. In the figure, 1 is a compressor, 2 is an outdoor fan, 3 is a four-way valve, 4 is an indoor fan, 5 is a louver drive motor, These are designed to be driven by a commercial AC source 6. The pressure aai, the outdoor fan 2, and the four-way valve 3 are each relays 7a.

7b and 7c are designed to be turned ON and OFF.

A bidirectional control element 8 is connected to the indoor fan 4, and a drive circuit 9 consisting of a photocoupler or the like is connected to its gate.
The rotational speed of the indoor fan 4 is variably controlled by controlling the phase angle of the AC power source by turning the bidirectional control element 8 ON and OFF in the drive circuit 9. Further, a relay 10 for adjusting the louver angle is connected to the louver drive motor 5.

The voltage mni has a current detector 11 that detects its input current.
is provided, and its detected value is input to the compressor overload prevention control means 12. Also, pressure ia overload prevention control hand P11
2, the detected value of the louver angle detector 13 and the detected value of the rotation speed detector 14 of the indoor fan 4 are input. The compressor overload prevention control means 12 is connected to and driven by a DC power supply circuit 15 that converts the commercial commercial current s6 into a DC power supply, and the relays 7a, 7 are activated based on the various detected values.
Relay 10 for opening/closing control and adjusting louver angle b
It also outputs a rotation speed control signal for the indoor fan 8 to the drive port #I9.

FIG. 2 shows a control block diagram of the compressor overload prevention control means 12, in which the compressor overload prevention control means 12 receives compression a current information 11a from the current detector 11 and angle signals from the louver angle detector 13. 13a1 The rotation speed signal 14a of the indoor fan 4 from the rotation speed detection detector 14 is input, and when the compression R1 is in an overload state, the outdoor fan 2 is set to 0N- so that the input current value does not exceed the limit value. The compressor overload prevention control is performed by controlling the louver drive motor 5 and the rotation speed of the indoor fan 4.

FIG. 3 shows a sectional view of the indoor unit 16, and in the figure, the main body 1
7 has an indoor heat exchanger 18. An indoor fan 4 is provided,
The air outlet 19 of the main body 17 has a heat exchanger J! ! ! ! A louver 19 is provided to be able to move vertically and downwardly for adjusting the subsequent vertical wind direction, and this louver 20 is rotated by a louver drive motor 5.

Now, for example, in heating sleep operation, the louver 20 in the room a16 is set horizontally as shown by the solid line in FIG. 3, similar to the cooling air outlet position. When the heating sleep operation is performed in this state, the heat absorbed by the outdoor unit (not shown) becomes larger than the heat released in the indoor room 1a16, and the compressor becomes overloaded.

In the present invention, the pressure flil accident load prevention control means 12 includes:
In response to an increase in the input current value detected by the current detector 11, the outdoor fan 2 is first turned off from the ON state.
When the relay 7b is opened so that the operation is continued for a while in this state and the input current value increases, the louver 20 shown in FIG. The opening degree of the louver 20 is controlled so that the opening area of the Zunawaji air outlet 19 becomes large. This louver 2
The opening adjustment of 0 is performed by closing the louver drive relay 10 and operating the louver drive motor 5 based on the detected value of the louver angle detector 13. This increases the amount of air blown out from the outlet 19 without changing the rotational speed of the indoor fan 4, increases the amount of heat dissipated by the indoor heat exchanger 18, and prevents an increase in input current. Even with the compressor overload prevention control described above, if the compressor input current becomes large, the indoor fan 4
If the number of revolutions still increases, increase the compression 1.
Stop the operation of a1.

FIG. 4 shows the release control operation of the input current 22 of the compressor by the compressor overload prevention control means 12 described above. When the input current I increases and the current value exceeds It, the outdoor fan is activated. OFF, and if the current increases further to 12 or more, open the louver 20, turn the indoor fan to high (HIGH H') at 13 or more, and stop the compressor when it reaches 14 or more. The machine overload prevention control means 12 performs pressure machine overload prevention control according to each current value.

Next, this pressure 1aR overload prevention +L control will be explained in more detail with reference to the flowchart of FIG.

When control is started, first the current I is detected 21 and 1 <
1+ or not is determined 22, and if the current I is 11 or less, normal operation 23 is continued. If the current I is 11 or more, then I<1. If it is 13 or more and I2 or less, set the outdoor fan to 0FF25, and if it is 12 or more,
Furthermore, it is determined 26 whether I<I. If the current &iI is equal to or less than I3 in this judgment 26, then a judgment 27 of the louver opening is made, and if the opening is small, the louver is opened 28. Also, if the current value I is 11 or more in judgment 1tlr26, then it is determined whether I < I 4 is movable29, and if it is 4 or less, the rotation speed of the indoor fan is set to high (HIGH > 30,
14 or above, the compressor is stopped 31 for at least 3 minutes.

As described above, the compressor overload prevention control means 12 detects the input current of the compressor and turns the outdoor fan 2 off when the compressor is overloaded.
F, and if the overload condition continues, the opening degree of the louver 20 is detected before rotating the indoor fan 4 at high speed, and the opening degree is increased, that is, the air volume on the indoor unit side is increased. By doing this, compression is reduced without increasing the rotation speed of the indoor fan 4 as much as possible. A1 compressor overload prevention control can be performed.

In the above-mentioned embodiment, the example of the heating sleep operation was mainly explained, but the same control may be performed even when the compressor becomes overloaded during the normal heating operation. In addition, in the case of cooling operation, the heat absorption and heat radiation inside and outside the room are reversed, so when the compressor is overloaded, first switch the outdoor fan 2 to high speed rotation, and if there is still a lot of heat absorption inside the room, The louver opening should be controlled to be smaller, and if the overload continues even then, the indoor fan should be turned off and the pressure generator should be stopped.

[Effects of the Invention] As is clear from the above explanation, according to the present invention,
When the compressor is overloaded, the outdoor fan is controlled and the opening of the indoor louver is adjusted to prevent the compressor from overloading. J'li) Discomfort caused by addition can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, and Fig. 2 is a circuit diagram showing an embodiment of the present invention.
3 is a sectional view of the indoor unit in the present invention, FIG. 11 is a diagram explaining the operation of the compressor overload prevention control means in the present invention, and FIG. 5 is the compressor shown in FIG. 4. It is a figure which shows the control flowchart of a machine overload prevention control means. In the figure, 1 is a pressure machine, 2 is an outdoor fan, 4 is an indoor fan,
Reference numeral 5 indicates a louver drive motor, and reference numeral 12 indicates a louver passing load prevention control means 20.

Claims (1)

[Claims] 1. In an air conditioner control device that has a louver drive motor in the indoor unit that opens and closes the indoor louver, it detects the input current of the compressor, and when the current value exceeds a predetermined value, it controls the outdoor fan and controls the indoor louver. A control device for an air conditioner, comprising compressor overload prevention control means for controlling a louver drive motor to adjust the opening degree of an inner louver.