JPH01256749A - Method and device of controlling air-conditioning device - Google Patents

Abstract

PURPOSE:To rapidly restart air-conditioning operation and to improve air- conditioning function by a method wherein an operation signal indicating that a device is in operation is stored in a memory means, and when a power feed system is restored to an normal state after service interruption, operation is automatically restarted. CONSTITUTION:Outdoor and indoor units A and B are controlled by means of a control signal from a controller 5. An operation signal erasable by an erasing means 51b is written in an non-volatile memory means 53d, in which control data is stored and from which the data is read out, by a writing means 51a upon the working of the outdoor and indoor units A and B. Meanwhile, when a power source is turned on after disconnection of the power source, for example, when a power feed system is restored to an ordinary state after service interruption, stored data in the memory means 53d is read by means of a discriminating means 51c to discriminate an operation signal. When the operation signal is derived from memory data, an operation means 51d automatically operates the outdoor and indoor units A and B.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device and a control method for an air conditioner, and particularly relates to measures against power outages.

(Prior Art) In general, various types of control devices for air conditioners have been proposed. For example, as disclosed in Japanese Patent Application Laid-Open No. 61-202041, A ROM, a RAM, etc. are provided in the controller, and a compressor, etc. is controlled by a control signal from the controller, and a remote control controller is connected to the controller,
The controller is equipped with a ROM, a RAM, etc., and is connected to various switches, and controls the air conditioner by transmitting operation signals from the switches to the controller of the air conditioner.

(Problem to be Solved by the Invention) In the above-mentioned control device for an air conditioner, when there is a momentary power outage to the remote control and the air conditioner stops, the operation switch must be turned on each time the air conditioner stops. The air conditioner continues to operate even if there is a momentary power outage.

However, conventionally, when the power supply to an air conditioner is interrupted for a certain period of time, the air conditioner stops operating, and even after the power is restored, it remains stopped unless the operation switch is turned on. In this case, even if air conditioning is possible after the power is restored, there may be cases where the air conditioning is not performed, resulting in a problem of low reliability. In particular, the air conditioner in the computer room operates 24 hours a day, and if it remains stopped even after the power is restored, it will have a serious effect on the calculation function, resulting in a problem of low reliability.

The present invention has been made in view of the above, and aims to improve the air conditioning function by storing operation signals and automatically restarting operation after power is restored. be.

(Means and effects for solving the problem) In order to achieve the above object, the measures taken by the invention according to claim (1) are:
As shown in FIG. 1, first, an outdoor unit (A) and an indoor unit CB) are provided, and the outdoor unit (A) and the indoor unit (B) are controlled by control signals from a controller (5). It is assumed to be a control device for an air conditioner.

A nonvolatile storage means (53d) in which control data can be written and erased is provided. Furthermore, writing means (51a) writes operation signals into the storage means (53d) by operating the outdoor unit (A) and the indoor unit (B).
) and erasing means (51b) for erasing the driving signal stored in the storage means (53d). Additionally, discriminating means (51c) is provided which reads out the data stored in the memory means (53d) and discriminates the operation signal when the power is turned on. Furthermore, the configuration includes an operating means (51d) for operating the outdoor unit (A) and the indoor unit (B) when the discriminating means (51c) derives an operating signal from the data stored in the storage means (53d). It is said that

Moreover, the means taken by the invention according to claim (2) includes an outdoor unit (A) and an indoor unit (B), and the outdoor unit (A) and the indoor unit (B) are controlled by a controller (
The present invention is based on the method of controlling an air conditioner using control signals as described in 5).

First, the writing means (51a) writes the operation signal to be erased by the erasing means (51b) into the erasable non-volatile storage means (53d) by writing the control data (51a) into the outdoor unit.
A) and the indoor unit (B) are operated. On the other hand, when the power is turned on after the power is cut off, for example, when the power is restored after a power outage, the determining means (51C) reads the stored data in the storage means (53d) to determine the operation signal, and converts the operation signal from the stored data. When derived, the operating means (51d) automatically operates the outdoor unit (A) and the indoor unit (B).

(Effect of the invention) Therefore, according to the inventions of claims (1) and (2),
By storing the operating signal indicating that the machine is in operation in the non-volatile storage means (53d), when the power is restored after a power outage, if the operating signal is stored, the machine will automatically start operating. Air conditioning operation can be resumed quickly,
It is possible to improve the air conditioning function. In particular, in the case of air conditioning in a computer room, operation is stopped only during the power outage period, improving reliability. Furthermore, it is possible to reliably prevent maintenance that is mistaken for malfunction.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 2 shows the refrigerant piping system of the multi-type air conditioner (1) according to the invention of claims (1) and (2).
For example, A) is an outdoor unit installed on the roof of a high-rise building, and (B) is an indoor unit placed indoors such as a computer room in a high-rise building.
B), (B), . . . are connected in parallel to the outdoor unit (A). Inside the outdoor unit (A), there is a compressor (11), an oil separator (12) that separates oil from the gas discharged from the compressor (11), and a solid line in the figure during heating operation. During cooling operation, the four-way switching valve (13) switches as shown by the broken line in the figure, and the fan (14a)
) and serves as a condenser during cooling operation and as an evaporator during heating operation, and a supercooling coil (15).
An outdoor electric expansion valve (16) that adjusts the refrigerant flow rate during cooling operation and throttles the refrigerant during heating operation, a receiver (17) that stores liquefied refrigerant, and an accumulator (
18) is built in as a main actuator, and each of the actuators (11) to (18)) is connected through a refrigerant pipe (2) so that refrigerant can flow therethrough. Also,
The compressor (11) is equipped with an inverter (3
The first compressor (11a), whose capacity is adjusted by a), and the unloader (3b), which operates depending on the pilot pressure, control the capacity in two stages: a fully loaded (100%) state and an unloaded (50%) state. The second compressor (1
1b) are connected in parallel via a check valve (2a).

On the other hand, the indoor units (B), (B), .
), (4),..., and the indoor heat exchanger (
Refrigerant branch pipe (21) connected to 4), (4), ...
, (21), . . . include an indoor electric expansion valve (41), which is one of the actuators and which adjusts the refrigerant flow rate during heating operation and throttles the refrigerant during cooling operation.
41), ... are interposed, and the refrigerant branch pipe (2
1), (21), . In addition, the air conditioner (1) is equipped with many sensors.
) is placed at the air suction port of each indoor heat exchanger (4), and a temperature sensor (TH2) and (TH
3) is a temperature sensor that detects the temperature of the liquid side and gas side pipes of each indoor heat exchanger (4), (TH4) is a temperature sensor that detects the temperature of the discharge pipe of the compressor (11), and (TH4) is a temperature sensor that detects the temperature of the discharge pipe of the compressor (11).
5) is a temperature sensor that detects the evaporation temperature of the outdoor heat exchanger (14) during heating operation, (TH6) is a temperature sensor that detects the temperature of the intake gas of the compressor (11), and (TH7) is the outdoor heat exchanger (14) a temperature sensor that detects the nearby outside temperature;
(PS) is a pressure sensor that detects the discharge gas pressure during heating operation and the intake gas pressure during cooling operation.

In addition, in Fig. 2, various auxiliary actuators are provided in addition to the above-mentioned main actuators.
3a) is the bypass circuit (23) of the second compressor (1lb).
) is an unloader solenoid valve that is "open" when the second compressor (1lb) is stopped and unloaded, and "closed" when it is fully loaded, and is connected to the bypass circuit (23). A capillary tube (23b) is interposed therebetween. (24a) is installed in the pressure equalizing hot gas bypass circuit (24) that connects the refrigerant pipe (2) on the discharge side and the refrigerant pipe (2) on the suction side, and is used during low load during cooling operation and during outdoor heat exchanger operation. (14) This is a hot gas solenoid valve that opens during defrosting operation. Further, (25) is a bypass circuit for heating overload control, and the bypass circuit (25) is a heating overload control bypass circuit.
) includes an auxiliary capacitor (25a) and a first check valve (25a).
5b), a high-pressure control valve (25c) that opens when the refrigerant pressure is high, and a second check valve (25(1)) are connected in series, and some of them are used to prevent liquid sealing when the operation is stopped. The liquid seal prevention bypass circuits (26) and (27) are connected to the third check valve (
26a) and a capillary tube (27a).

Furthermore, (28) is a liquid injection bypass circuit for adjusting the degree of superheating of intake gas during cooling/heating operation, and the liquid injection bypass circuit (
28) includes an injection solenoid valve (28a) that opens and closes in conjunction with the on/off of the compressor (11), and an injection solenoid valve (28a) that opens and closes in accordance with the degree of superheating of the intake gas detected by the temperature-sensitive cylinder (2b). A regulated automatic expansion valve (28b) is provided.

In Fig. 2, (HPS) is a high pressure switch for protecting the compressor, and (SP) is a service port.

The actuators of the electric expansion valves (16), (41), fans (4a), (14a), etc. are configured to be controlled by a controller (5), etc., which will be described later.

FIG. 3 shows the controller (5) in the indoor unit (B), and (51) is the central processing unit C.
The CPU (51) has an address bus (
52a), the user ROM (53a) system ROM (53
b) , RAM (53c), EEPROM (53d
), address decoder (53e) and two I10 ports (53f), (53g) are connected, and the above CPU (
The address signals of the user ROMs (51) and 53a
) etc. Furthermore, the above CPU
(51) is connected to the user ROM (53a)+ via a data buffer (54b) by a data bus (54a).
System ROM (53b), RAM (53c)
, EEPROM (53d) and I10 port (5
3f) and (53g) are connected to each other, and data signals are exchanged between the CPU (51) and each user ROM (53a).

In addition, the above CptJ (51) has a control bus (
55a) is connected to one I10 baud (53g) via a bus controller (55b) to exchange control signals.

The EEFROM (53d) is a writable and erasable non-volatile storage means, and stores operating data of the outdoor unit (B) and the indoor unit (A) at the time of a power outage, for example, information about the compressor (11a) that was started. or (llb
) etc. are transferred and stored from the RAM (53C), and
A driving flag, which is a driving signal, is provided. On the other hand, the CPU (51) writes an operation signal to the EEFROM (53d) when the outdoor unit (A) and the indoor unit (B) are put into operation by an operation switch (not shown), that is, sets an operation flag. Writing means (5
1a) and an erasing means (51b) that resets the operation flag of the EEFROM (53d) and erases the operation signal when the operation of the outdoor unit (A) and the indoor unit (B) is stopped by a stop switch (not shown). is provided. Furthermore, the CPU (51) includes a determining means (51c) for reading out the data stored in the EEPROM (53d) when the power is turned on and determining whether or not the driving flag is set to determine the driving signal; (51c)
An operating means (51d) is provided which automatically operates the outdoor unit (A) and the indoor unit (B) when the controller derives an operation flag -1, that is, an operation signal.

In addition, in the controller (5), one I10
(53f) has an input terminal (56a) for AC power supply, etc.
and the output terminal (56b) is connected to the other I10 boat (53
g) is connected to an input terminal (56c) for temperature signals detected by the temperature sensors (THI) to (TH2), and a clock signal is input from the clock circuit (57a) to the CPU (51). ing. Further, a communication signal processing circuit (57b) is connected to the data bus (54a), and the signal processing circuit (57b) is connected to a transmission circuit (57c).
The signal processing circuit (57b) and the outdoor unit (A) are connected to the controller (not shown) of the outdoor unit (A) through the transmission circuit (57b) to exchange data signals.
A transmission processor (57d) is connected via the transmitter (57c).

The transmission processor (57d) is connected to the control panel (58) to send and receive various switching signals, and is also connected to the indoor electronic expansion valve (41) via the interface (57e) to the signal processing circuit (57b). )
and an inverter (
3a) to exchange control signals. Also, from the address decoder (53e), EE
A select signal (CS) is output to the PROM (53d) and the like.

Next, the operation of the air conditioner (1) will be explained.

First, in the cooling/heating operation of the air conditioner (1), each indoor unit (B), (B)... uses the indoor heat exchanger (4), (4) according to the set temperature in each room.

... refrigerant flow rate or throttle and indoor fan (4a).

(4a), . . . air volume is controlled. On the other hand, the outdoor unit (A) is the indoor unit (B), (B).

...The refrigerant flow rate of the outdoor heat exchanger (14) and the capacity of the compressor (11) are controlled according to the operating state, and appropriate operation 1iIJgD is performed according to the air conditioning load in each room.

Next, the structure and operation of the invention according to claims (1) and (2) regarding the operation and stop operations will be explained based on the control flow shown in FIG. 4.

First, the operation starts with the outdoor unit (A) and the indoor unit (B) stopped by the stop switch on the control panel (58).

Then, when the power is turned on in step ST1, the process moves to step ST2, and the determination means (51c)
Read the memory data of M (53d) and set the operation flag DF.
Determine whether or not it is standing.

At this time, since the operation is stopped by the stop switch as described above, the erasing means (51b) is stored in the EEPROM (
53d) is reset, and step S
The process moves from T2 to step ST3, and the power recovery processing lamp is turned off, but since the power recovery process lamp is not turned on at this time, the process directly moves to step ST4, and a stop processing operation is performed. Since this processing operation is also performed during the stop operation using the stop switch, the process moves directly to step ST5.

Then, in this step ST5, it is determined whether or not the operation switch of the control panel (58) is turned on, and until it is turned on, the determination becomes NO and step ST3
On the other hand, when the operation switch is turned on, step S
Moving to T6, the writing means (51a) is EEFROM (5
3d) The operation flag DF is set and the operation signal is written. Thereafter, the process moves from step ST6 to step ST7, where the operating means (51d) puts the outdoor unit (A) and the indoor unit (B) into operation, and the process moves to step ST8. In this step ST8, it is determined whether the stop switch is turned on or not, and the process returns to step ST6 until the stop switch is turned on, and the outdoor unit (A) and the indoor unit (B) continue to operate.

In this operating state, if a power outage occurs, the EEFROM
Various operating data stored in the ROM (53c) is transferred and stored in (53d).

After that, when the power is restored and the power is turned on in step STI, the process moves to step ST2 as described above, and the determining means (51c
) determines whether the operation flag DF of the EEFROM (53d) is set. At this time, since the power has been restored after a power outage with the operation flag DF still set in step ST6, the determining means (51c) derives an operation signal, and the process moves to step ST9. Then, the power recovery processing timer (T1) is started, and this power recovery processing timer (T1) is set for 3 minutes to prevent rebooting. After that, the process moves to step 5TIO, and any one of the It is determined whether or not a switching signal is input, and if no switching signal is input, the determination is N.

Then, the process moves to step 5T11. In this step STI 1, it is determined whether or not the power restoration processing timer (T1) has counted up, and until it has counted up, the process moves to step 5T12, the power restoration processing lamp is turned on, and the process returns to step 5TIO, and the above-mentioned power restoration processing is performed. Timer (T1
) is counted up to determine whether any switching signal has been input. Then, the power recovery processing timer (
When T1) counts up, the process moves from step 5T11 to step 5T13, and the data stored in the EEPROM (53d) is read. For example, before a power outage, which compressor (
After reading out whether or not lla) and (llb) were being driven, the process moves to step 5T14, where the power restoration processing lamp is turned off and the power restoration processing is completed. Next, the process moves to step ST6, and the operation flag DF of the EEPROM (53d) is set. In this case, since the operation flag is set, the process directly moves to step ST7. Then, in step ST7, the operating means (51d) automatically starts operating the outdoor unit (A) and the indoor unit (B) in the state before they were stopped.

Thereafter, the process moves from step ST7 to step ST8, where it is determined whether or not the stop switch is turned on, and the operation returns to Sr1 and continues until the stop switch is turned on. When the stop switch is turned on, the determination in step ST8 becomes YES, and the process moves to step 5T15, where the erasing means (51 b) resets the operation flag DF of the EEFROM (53d), and the process moves to step ST3, where the power recovery processing lamp is turned on. The light goes out, and since it is off at this time, the process moves directly to step ST4 to perform a stop process, and then the process moves to step ST5 to wait for the operation switch to be turned on as described above.

On the other hand, in step 5TIO above, if the operation switch, etc. is turned on while the power restoration processing timer (T1) is counting, the power restoration processing is canceled due to an operation by the administrator, and the process returns from step 5TIO to step ST3. Move, step 5
Turn off the power recovery processing lamp that was lit at T12, and proceed to step S.
After the process moves to T4 and a stop process is performed, the process moves to step ST5 and normal control operations are performed.

Therefore, EEFROM (53
d) By storing an operating signal indicating that the vehicle is in operation,
When the power is restored after a power outage, if the operation signal is stored, the operation will be automatically started, so the air conditioning operation can be quickly restarted, and the air conditioning function can be improved. In particular, in the case of air conditioning in a computer room, operation is stopped only during the power outage period, improving reliability. Furthermore, it is possible to reliably prevent maintenance that is mistaken for malfunction.

In addition, although the above-mentioned example explained the multi-type air conditioner (1), it may have one indoor unit (B).

In addition to the EEFROM (53d), storage means include
Any nonvolatile memory that can be written to and erased may be used.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the invention according to claims (1) and (2). Fig. 2 to Fig. 4 show one embodiment, Fig. 2 is a refrigerant circuit diagram of an air conditioner, Fig. 3 is a control block diagram of the indoor unit controller, and Fig. 4 is a control flow of operation/stop operation. It is a diagram. (1)...Air conditioner, (4)...Indoor heat exchanger, (5)...Controller, (11)...Compressor,
(14)...Outdoor heat exchanger, (51)...CPU,
(51a)...Writing means, (51b)...Erasing means, (51C)...Discrimination means, (51d)...Driving means, (53d)...EEFROMo Patent applicant Daikin Industries Co., Ltd. -1, 1 Agent Patent Attorney Former 1) Hiroshi 1. -
Ichino

Claims (2)

[Claims] (1) A control device for an air conditioner comprising an outdoor unit (A) and an indoor unit (B), the outdoor unit (A) and the indoor unit (B) being controlled by control signals from a controller (5). , a non-volatile storage means (5) in which control data can be written and erased.
3d), the outdoor unit (A) and the indoor unit (
B) writing means (51a) for writing an operation signal into the storage means (53d) according to the operation; and the storage means (53d).
erasing means (51b) for erasing the operation signal stored in the operating signal;
Discrimination means (51c) for reading the stored data in the storage means (53d) and determining the operation signal when the power is turned on;
When the determination means (51c) derives the operation signal from the data stored in the storage means (53d), the outdoor unit (A
) and an operating means (51) for operating the indoor unit (B).
d) A control device for an air conditioner, comprising: (2) A method for controlling an air conditioner comprising an outdoor unit (A) and an indoor unit (B), the outdoor unit (A) and the indoor unit (B) being controlled by control signals from a controller (5). , a non-volatile storage means (5) in which control data can be written and erased.
3d), the writing means (51a) writes the operation signal to be erased by the erasing means (51b) by the operation of the outdoor unit (A) and the indoor unit (B), while the discrimination means (51c) is the storage means (
53d), the operating signal is determined, and the operating signal is derived from the stored data, the operating means (
51d) is the outdoor unit (A) and the indoor unit (
B) A method for controlling an air conditioner, characterized by operating the air conditioner.