JPH10267432A - Actuation control device of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an actuation control device of an air conditioner in which actuation of a compressor can be surely carried out. SOLUTION: In the case that a DC motor 14 is applied as a driving motor for a compressor 11, if a failed actuation of the DC motor 14 is detected when the DC motor 14 is actuated under an application of predetermined voltage, the number of times of failure is counted by an NG counter 54 and at the same time, an actuation voltage against the DC motor 14 is increased in sequence by a predetermined voltage for every failure in actuation, re-actuation is carried out for it and further when the number of failure of actuation counted by the NG counter 54 reaches the predetermined number of times (5 times, for example), stopping in abnormal state is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner start control device equipped with a compressor driven by a DC motor and started at a predetermined voltage at the time of start.

[0002]

2. Description of the Related Art Recently, air conditioners represented by so-called air conditioners have been remarkably popularized and have been installed in many households.

[0003] In such an air conditioner, attention has been paid particularly to reduction in power consumption. As the competition in this regard increases in each manufacturer, the annual electricity bill is displayed. It has been done to claim superiority.

[0004] Under these circumstances, from the viewpoint of power saving, power saving for each component to be used has been studied. As an example, a DC (direct current) brushless motor has been used as a motor of a compressor. Has become.

[0005]

However, this DC brushless motor is designed to start at a constant voltage at the time of startup, but sometimes cannot be started for some reason. In this case, if the compressor itself is abnormally stopped every time such a start failure occurs, the reliability of the air conditioner as a whole is significantly impaired. Reboot is attempted up to two times, and when it cannot be started even before, it stops abnormally for the first time.

[0006] However, even in this case, if there is no abnormality in the compressor itself, the compressor stops abnormally, which may give anxiety to the user, which adversely affects the reliability of the operation of the air conditioner. was there.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a start-up control device for an air conditioner that can surely start a compressor.

[0008]

According to the first aspect of the present invention,
Equipped with a compressor driven by a DC motor,
In a start-up control device for an air conditioner that is started at a predetermined voltage, a voltage adjustment unit that adjusts a start-up voltage, a detection unit that detects a start-up failure at start-up, a counter that counts the number of start-up failures, Each time a failure occurs, the startup voltage is sequentially increased by a predetermined voltage via the voltage adjustment unit, and the startup is restarted. When the startup failures reach a predetermined number of times, the startup voltage control unit performs an abnormal stop.

According to a second aspect of the present invention, in the first aspect, an abnormal stop display means for displaying an abnormal stop when the stop is abnormal.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of an air conditioner to which the present invention is applied. The air conditioner in this case includes an outdoor unit 1 for generating a heat source necessary for cooling and heating, and an indoor unit 2 for blowing out the air for cooling and heating generated by the outdoor unit 1.

The outdoor unit 1, which is installed on an outdoor veranda or the like, has a compressor 11, a four-way switching valve 12, an outdoor air heat converter 13, and an expansion valve 15, and has a liquid pipe 3 and a gas pipe 4. It is connected to the indoor unit 2 via the power supply. The indoor unit 2 is installed on a wall surface of a room or the like, and has an indoor air heat converter 21.

The compressor 11 of the outdoor unit 1 includes:
DC brushless motor (hereinafter referred to as DC)
Motor 14), and the DC motor 14
Is connected to the activation control device 5 according to the present invention.

The activation control device 5 includes a power supply 51, a voltage adjustment unit 52, an NG detection unit 53, an NG counter 54, an activation voltage control unit 55, and an activation switch (including a remote control switch) 5.
6. It has an abnormal stop display section 57.

The voltage adjusting section 52 is connected to a power supply 51 and adjusts a starting voltage supplied to the DC motor 14 from the power supply 51. NG detector 53
Is for detecting a start failure (NG) when the DC motor 14 is started. The NG counter 54 includes an NG detection unit 53
Counts the number of times of failure in starting the DC motor 14 detected by the above. Starting voltage control unit 55
Is composed of a CPU. When the start switch 56 is turned on, the voltage control unit 52 is instructed to supply a start voltage to the DC motor 14 by the power supply 51 and the NG detection unit 53 detects the start of the DC motor 14. Each time the startup fails at the time of startup, the voltage adjusting unit 52 is instructed to restart by sequentially increasing the startup voltage of the DC motor 14 by a predetermined voltage, and the NG counter 54 performs the startup failure a predetermined number of times (for example, five times). When counting, an abnormal stop is instructed.

An abnormal stop display section 57 is connected to the start voltage control section 55. The abnormal stop display unit 57 is configured to display a message indicating the abnormal stop when the starting voltage control unit 55 instructs the abnormal stop.

In this configuration, when the start switch 56 is turned on, the flowchart shown in FIG. 2 is executed.

First, when the start switch 56 is turned on, in step 201, the start voltage controller 55
2 is instructed to supply a starting voltage, and a starting voltage from the power supply 51 is applied to the DC motor 14 from the voltage adjusting unit 52.

From this state, in step 202, the NG detector 53 determines that the DC motor 14 has failed to start. Here, when the activation of the DC motor 14 is successful,
The process ends, and the operation shifts to a normal operation state.

In this case, when the operation of the compressor 11 is started by the activation of the DC motor 14, the high-temperature and high-pressure gas compressed by the compressor 11 passes through the four-way switching valve 12 in the cooling operation. It is sent to the outdoor air heat converter 13 to be condensed and liquefied, decompressed by the expansion valve 15, sent to the indoor air heat converter 21 of the indoor unit 2 through the liquid pipe 3, and evaporated there, due to the latent heat at this time. It takes away the heat of the surroundings to fulfill the purpose of cooling the room.

On the other hand, in step 202, the NG detection section 53
If it is determined that the DC motor 14 has failed to start,
In step 203, the number of failures in activation is counted up by the NG counter 54. And step 204
Then, it is determined whether the number of startup failures by the NG counter 54 has reached a predetermined number (here, five times).

If the number of failures in starting the DC motor 14 has not reached five, the starting voltage control unit 55 sends the DC motor 14
A restart is instructed by increasing the starting voltage to the predetermined voltage.

Then, returning to step 201, the starting voltage increased by a predetermined voltage is applied to the DC motor 14 from the voltage adjusting unit 52, and the DC motor 14 is restarted. Startup failure is determined.

If it is determined that the DC motor 14 has failed to start, the number of times the NG counter 54 failed to start is counted up in step 203, and the number of times the NG counter 54 failed to start in step 204. After it is determined that the number has reached 5 times, step 2
At 05, the starting voltage to the DC motor 14 is increased by a predetermined voltage to the voltage adjusting unit 52, and the restart is executed.

In the same manner, each time the activation of the DC motor 14 fails, the voltage adjustment unit 52
Are sequentially increased by a predetermined voltage, and the restart is repeated.

Thereafter, the failure of the start of the DC motor 14 is repeated. If it is determined in step 204 that the number of failures of the start by the NG counter 54 has reached 5, the process proceeds to step 206 and the start voltage control unit 55 Indicates an abnormal stop. In this case, in response to an abnormal stop instruction from the start-up voltage control unit 55, the abnormal stop is indicated by the abnormal stop display unit 57.
Is displayed, and the abnormal stop is notified to the outside.

Therefore, according to this configuration, when the DC motor 14 is used as the driving motor for the compressor 11,
When the C motor 14 is started at a predetermined voltage, when the start failure of the DC motor 14 is detected,
The number of times of starting failure is counted by the NG counter 54, and the starting voltage for the DC motor 14 by the voltage adjusting unit 52 is sequentially increased by a predetermined voltage every time the starting is failed, and restarting is performed. When the number of startup failures reaches a predetermined number of times (for example, five times), the motor is stopped abnormally. The compressor can be started without fail in the process of restarting by increasing the voltage one by one, which makes it possible to reliably start the compressor. It is possible to eliminate the unpleasant feeling of anxiety for the user and to further enhance the reliability of the operation of the air conditioner as compared to those that are easy to fall. Kill.

[0028]

As described above, according to the present invention, when starting the DC motor for driving the compressor, if the start fails, the starting voltage for the DC motor is sequentially increased by a predetermined voltage. When the number of failed startups reaches a predetermined number, the motor is stopped abnormally.Therefore, the DC motor can always be started in the process of sequentially increasing the startup voltage by a predetermined voltage and restarting. This makes it possible to reliably start the compressor, eliminate the inconvenience of falling into an abnormal stop even though there is no abnormality in the compressor itself, and to resolve the user's unpleasant feeling of uneasiness, The reliability of the operation of the harmonic machine can be further improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Outdoor unit, 11 ... Compressor, 12 ... Four-way switching valve, 13 ... Outdoor air heat converter, 14 ... DC motor, 15 ... Expansion valve, 2 ... Indoor unit, 21 ... Indoor air heat converter, 3 ... Liquid Piping, 4 Gas pipe, 5 Start control device, 51 Power supply, 52 Voltage regulator, 53 NG detector, 54 NG counter, 55 Start voltage controller, 56 Start switch, 57 Abnormal stop Display section.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Sachiichi Kimura 3-1-1, Asahicho, Nishi-Biwajima-cho, Nishi-Kasugai-gun, Aichi Pref.

Claims (2)

[Claims] 1. A start-up control device for an air conditioner equipped with a compressor driven by a DC motor and started at a predetermined voltage at start-up, comprising: a voltage adjusting means for adjusting a start-up voltage; Detecting means for detecting the start failure; a counter for counting the number of times of the start failure; and for each start failure, the start voltage is sequentially increased by a predetermined voltage via the voltage adjusting means and restarted. And a starting voltage control means for causing an abnormal stop when the temperature of the air conditioner is reached. 2. An abnormal stop display means for displaying an abnormal stop when the stop is abnormal.
An activation control device for an air conditioner as described in the above.