JPH05322260A - Operation control device for air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] The restart time at power restoration after a power failure can be changed so that the allowable amount of power receiving equipment is not exceeded. [Composition] An air conditioning control means (41) for controlling an air conditioning operation is provided. A power failure detection means (42) for detecting a power failure and outputting a power recovery signal at the time of power recovery is provided. Further, operation recovery means (43) is provided for outputting a restart signal to the air conditioning control means (41) so as to restart the air conditioning operation after the power failure detection means (42) outputs the power recovery signal. In addition, the power failure detection means (42) receives the delay setting volume (45) for setting the restart time for delaying the restart of the air conditioning operation and the set time signal of the delay setting volume (45). When the power recovery signal is output, the delay signal is sent to the operation recovery means (43) so that the operation recovery means (43) outputs the restart signal after the restart time set by the delay setting volume (45) has elapsed. A delay executing means (46) for outputting is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for an air conditioner, and more particularly to a measure for restarting a power supply after a power failure.

[0002]

2. Description of the Related Art In general, an operation control device for an air conditioner, as disclosed in Japanese Patent Laid-Open No. 63-100286, supplies power to a compressor from an electric power source through an inverter so that the compressor can be operated. There is one in which the operating frequency is changed to change the compressor capacity so that the air conditioning capacity corresponds to the air conditioning load. Then, the operation control device is provided with an instantaneous power failure determination means and an automatic recovery means so that when a power failure occurs, the compressor is made to wait for 3 minutes and restarted after the power is restored.

[0003]

In the above-described operation control device for the air conditioner, the compressor is uniformly restarted after the 3-minute waiting time has elapsed when power is restored.
When a plurality of air conditioners are installed, for example, when four air conditioners are installed, 4 when the power is restored after a power failure.
The air conditioners of the units will be restarted at the same time. However, in this case, since a large starting current is generated when the compressor in the air conditioner is started, there is a problem that the allowable amount of the power receiving equipment is exceeded immediately after the power is restored.

The present invention has been made in view of the above points, and an object thereof is to change the restart time at the time of power recovery after a power failure so as not to exceed the allowable amount of power receiving equipment. Is.

[0005]

In order to achieve the above object, the means taken by the present invention is to provide a delay control means for delaying the restart time at power recovery.

Specifically, as shown in FIG. 1, the means taken by the invention according to claim 1 is to firstly provide an operation control device for an air conditioner, which comprises an air conditioning control means (41) for controlling an air conditioning operation. It is assumed.

A power failure detecting means (42) for detecting a power failure and outputting a power recovery signal at the time of power recovery is provided. Furthermore,
The power failure detection means (42) outputs a power recovery signal, and then a restart signal is sent to the air conditioning control means (41) so as to restart the air conditioning operation.
The operation recovery means (43) for outputting to In addition, in response to the power recovery signal of the power failure detection means (42), the operation recovery means (43) outputs the restart signal after the preset restart time has elapsed. ) Is provided with a delay control means (44) for outputting a delay signal.

The means taken by the invention according to claim 2 is the delay control means (4
4) is a power failure detection means for receiving a delay time setting means (45) for setting a restart time for delaying the restart of the air conditioning operation at the time of power recovery and a set time signal of the delay setting means (45). (42)
When the power recovery signal is output, the delay signal is sent to the operation recovery means (43) so that the operation recovery means (43) outputs the restart signal after the restart time set by the delay setting means (45) has elapsed. And a delay execution means (46) for outputting

[0009]

With the above structure, in the invention according to claim 1,
First, the air conditioning control means (41) controls the compressor, the indoor fan, etc. by turning on the temperature control operation switch and the like, and the air conditioner blows out the conditioned air so that the indoor temperature becomes the set temperature.

During this air conditioning operation, power failure detection means (4
In 2), a power failure is detected and a power recovery signal is output when power is restored. For example, the power failure detection means (42), while detecting the power failure when the power supply of the control power supply is stopped,
When power supply to the control power supply is started, power recovery is detected and a power recovery signal is output.

When the power failure detection means (42) outputs a power recovery signal after a power failure, the operation recovery means (43) restarts the air conditioning operation after the power failure detection means (42) outputs the power recovery signal. Then, the restart signal is output to the air conditioning control means (41).

At that time, in response to the power recovery signal of the power failure detection means (42), the delay control means (44) causes the operation recovery means (43).
The delay signal is output to the operation restoring means (43) so that the restart signal is output after the preset restart time has elapsed.

Specifically, in the invention according to claim 2, the delay setting means (45) sets the restart time for delaying the restart of the air conditioning operation after power recovery, for example, 1 second. Is set to a delay time of 10 seconds. Therefore, the delay executing means (46) receives the set time signal of the delay setting means (45), and when the power failure detecting means (42) outputs a power recovery signal, the delay setting means (45) sets the delay time. A delay signal will be output to the operation recovery means (43) so that the operation recovery means (43) outputs the restart signal after the restart time has elapsed. After that, the air conditioning control means (41) causes the delay execution means (4
When the restart signal is received from 6), the air conditioning operation will be restarted in the stored operation state before the power failure.

[0014]

Therefore, according to the invention of claim 1,
Since the delay control means (44) can delay restarting after a power failure, when a plurality of air conditioners are installed, for example, when four air conditioners are installed, a power failure occurs. Each air conditioner can be sequentially restarted when the power is restored later. As a result, it is possible to prevent a large amount of starting current generated when the compressor is started from being superimposed, so that the load on the power receiving equipment can be reduced without exceeding the allowable amount of the power receiving equipment immediately after power restoration. You can

According to the invention of claim 2, the delay time can be set by the delay setting means (45).
The delay time can be set arbitrarily, the superposition of the starting current of the compressor can be surely prevented, and the restart can be promptly performed.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in FIGS. 2 and 3, (1) is an air conditioner set in a computer room or the like, and is composed of an indoor unit (2) and an outdoor unit (not shown). The indoor unit (2) has a compressor inside the casing (21).
(22), the indoor heat exchanger (23), the indoor fan (24), etc. are housed, while the outdoor unit (not shown) houses the outdoor heat exchanger, the outdoor fan, etc. Is configured. And the compressor (22)
And outdoor heat exchanger, expansion mechanism (not shown) and indoor heat exchanger
(23) is connected in sequence to form a refrigerant circuit, and the indoor heat exchanger (23) radiates the heat obtained by the outdoor heat exchanger to air-condition the room.

Casing (21) of the indoor unit (2)
In the casing (21), an air passage extending from the suction port (25) to the air outlet (26) is provided, while a suction port (25) is opened in the lower part of the front face and a blowout port (26) is opened in the upper part. It is formed in (27). The indoor heat exchanger (23) and the indoor fan (24) are housed in the air passage (27), while the lower part of the casing (21) is located below the drain pan (28). The compressor (22) and the control box (3) are housed in the above position, and the humidifier (not shown) is housed above the drain pan (28).

On the other hand, FIG. 4 shows an electric system of the air conditioner (1). The three-phase AC power source (3a) includes a motor (MC) of the compressor (22) and an indoor fan (24). ) Motor (MF1) is connected via an electromagnetic contactor (3b, 3c), and
The outdoor fan motors (MF21, MF22) are connected to the R phase and the T phase of the phase alternating current power supply (3a) via the electromagnetic contactor (3d).

A control power supply (3e) is connected to the R phase and the S phase of the three-phase AC power supply (3a), and the control power supply (3e) is connected.
Is provided in the controller (4). Furthermore, the above 3
Between the R phase of the phase AC power supply (3a) and the controller (4),
The temperature control operation switch (3f), the blow operation switch (3g) and the operation stop switch (3h) are connected in parallel, while the controller (4) has a temperature sensor (3i) for detecting the room temperature and an indoor A humidity sensor (3j) for detecting humidity is connected.

The electromagnetic contactor (3b) of the compressor (22) is provided between the S phase of the three-phase AC power source (3a) and the controller (4).
The relay coil (3k) that opens and closes, the relay coil (3l) that opens and closes the electromagnetic contactor (3c) of the indoor fan (24), the relay coil (3m) that opens and closes the water supply valve of the humidifier, and the A relay coil (3n) for controlling on / off of the heater is connected in parallel, and a humidification lamp (3o) indicating the operation of the humidifier is connected in parallel with the relay coil (3n) of the heater. The controller (4) is provided in the control box (3), and the control box (3)
As shown in FIG. 5, the humidifying lamp (3o) of the above humidifier is used.
The display part (31) provided with various kinds of indicator lights is stored in the upper part.

In addition to the air conditioning control means (41), the controller (4) includes a power failure detection means (4
2), operation recovery means (43) and delay control means (44) are provided. The air-conditioning control means (41) controls the air-conditioning operation, controls the compressor (22) and the like so that the room temperature becomes a set temperature, and is configured to sequentially update and store the operation state. There is.

The power failure detecting means (42) is configured to detect a power failure and output a power recovery signal when the power is restored. Specifically, the power failure detecting means (42) is the control power source.
(3e) is always supplied with power, so the control power supply (3e)
When power supply to the control power supply is stopped, power failure is detected, and when power supply to the control power supply (3e) is started, power recovery is detected and a power recovery signal is output.

Further, the operation recovery means (43) outputs a restart signal to the air conditioning control means (41) so as to restart the air conditioning operation after the power failure detection means (42) outputs the power recovery signal. When the air conditioning control means (41) receives the restart signal, the air conditioning control means (41) restarts the air conditioning operation in the stored operation state before the power failure.

The delay control means (44) comprises a delay setting volume (45) and a delay execution means (46), receives the power recovery signal from the power failure detection means (42), and returns to the operation recovery means ( 43)
Outputs a delay signal to the operation restoring means (43) so that the restart signal is output after a preset restart time has elapsed. Specifically, the delay setting volume (45) constitutes a delay setting means for setting a restart time for delaying the restart of the air conditioning operation at the time of power recovery, and it is from 1 second to 10 seconds.
The delay time in seconds is configurable. Further, the delay executing means (46) receives the set time signal of the delay setting volume (45), and when the power failure detecting means (42) outputs the power recovery signal, the delay setting volume (45) is set. The operation recovery means (43) is configured to output a delay signal to the operation recovery means (43) so that the operation recovery means (43) outputs the restart signal after the restart time has elapsed.

Next, the air conditioning control operation of the air conditioner (1) will be described. First, the air conditioning control means (41) controls the compressor (22), the indoor fan (24), etc. by turning on the temperature control operation switch (3f) or the blow operation switch (3g), and the air conditioner (1). Blows conditioned air so that the room temperature reaches the set temperature.

During this air conditioning operation, power failure detection means (4
In 2), a power failure is detected and a power recovery signal is output when power is restored. Specifically, the power failure detection means (42), since the control power supply (3e) is always supplied with power, when the power supply of the control power supply (3e) is stopped, while detecting a power failure, When power supply to the control power supply (3e) is started, power recovery is detected and a power recovery signal is output.

When the power failure detection means (42) outputs the power recovery signal after the power failure, the operation recovery means (43) restarts the air conditioning operation after the power failure detection means (42) outputs the power recovery signal. Then, the restart signal is output to the air conditioning control means (41).

At this time, the delay setting volume (45) sets the restart time for delaying the restart of the air conditioning operation, that is, 1 second to 10 seconds when the air conditioner (1) is installed. Second delay time is set. This delay time is set in an air conditioning system with multiple air conditioners (1) installed, for example,
A different delay time is set for each air conditioner (1) so that the restart at the time of power failure will be different.

Therefore, the delay executing means (46) receives the set time signal of the delay setting volume (45), and when the power failure detecting means (42) outputs the power recovery signal, the delay setting volume (46)
After the restart time set in (45) has elapsed, the operation recovery means (4
A delay signal will be output to the operation recovery means (43) so that 3) will output a restart signal. Thereafter, when the air conditioning control means (41) receives the restart signal from the delay execution means (46), it restarts the air conditioning operation in the stored operating state before the power failure.

Therefore, according to the present embodiment, the delay control means
(44) Since it was possible to delay the restart time after a power failure, when multiple air conditioners (1) were installed, for example, four air conditioners (1) were installed. In this case, each air conditioner (1) can be restarted sequentially when power is restored after a power failure. As a result, it is possible to prevent a large amount of starting current that occurs when the compressor (22) is started from being superimposed, so that the allowable amount of power receiving equipment is not exceeded immediately after power restoration, and the load of power receiving equipment is reduced. Can be reduced.

Further, according to the second aspect of the invention, since the delay time can be set by the delay setting volume (45), the delay time can be arbitrarily set, and the compressor (2
It is possible to surely prevent the superposition of the starting current in 2) and to promptly restart the system.

In this embodiment, the delay setting means (45) is composed of a volume, but any device capable of setting the delay time may be used. Further, the present invention is not limited to the air conditioner (1) of the embodiment. Further, the power failure detection means (42) is not limited to one that detects power failure and power recovery by the power supply of the control power supply (3e).

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of the present invention.

FIG. 2 is a front view of the air conditioner.

FIG. 3 is a cross-sectional view of the air conditioner.

FIG. 4 is an electric system diagram of the air conditioner.

FIG. 5 is a configuration diagram showing a control box.

[Explanation of symbols]

 1 Air conditioner 2 Indoor unit 3e Control power supply 4 Controller 22 Compressor 41 Air conditioning control means 42 Power failure detection means 43 Operation recovery means 44 Delay control means 45 Delay setting volume (delay setting means) 46 Delay execution means

Claims (2)

[Claims] 1. An operation control device of an air conditioner comprising an air conditioning control means (41) for controlling an air conditioning operation, and a power failure detection means (42) for detecting a power failure and outputting a power recovery signal at the time of power recovery. The power failure detection means (42) outputs a power recovery signal, and then a restart signal is sent to the air conditioning control means (41) so as to restart the air conditioning operation.
In response to the power recovery signal of the operation recovery means (43) and the power failure detection means (42), the operation recovery means (43) outputs a restart signal after a preset restart time has elapsed. Thus, the operation control device for an air conditioner, comprising: a delay control means (44) for outputting a delay signal to the operation recovery means (43). 2. The operation control device for an air conditioner according to claim 1, wherein the delay control means (44) sets a restart time for delaying restart of the air conditioning operation at power recovery. (45) and the set time signal of the delay setting means (45), when the power failure detection means (42) outputs a power recovery signal, the delay setting means (4
Operation recovery means (43) after the restart time set in 5) has elapsed
Is provided with a delay execution means (46) for outputting a delay signal to the operation recovery means (43) so as to output a restart signal.