JP3197748B2 - Control device for air conditioner - Google Patents

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 a terminal for inputting a signal for performing home automation (remote control) and a signal from a remote controller. The present invention relates to a control device having a remote control terminal for controlling an air conditioner remotely operated by two systems.

[0002]

2. Description of the Related Art Conventional control devices for controlling an air conditioner include turning on and off the air conditioner by operating a switch of a wireless remote controller (remote controller), and setting a set temperature and a timer operation for the air conditioner. There is something to do. From this remote control, a predetermined time (for example,
Every three minutes), the operation signal and the signal including the detected temperature are periodically output, and when the signal by the switch operation of the remote controller is not input, the control device outputs the air based on the signal periodically input from the remote controller. The operation of the air conditioner is checked to ensure that the air conditioner is not accidentally stopped by noise or the like.

[0003] Some of the control devices have a home automation (HA) terminal for performing home automation (remote control). A telecontrol device for controlling an air conditioner at home from outside by telephone is provided. Control and remote control from one place indoors can be performed. In addition, this home automation can also be used when the air conditioners provided in each room of a hotel or the like are simultaneously turned on and off.

[0004]

However, in the control device for an air conditioner having the remote control terminal and the HA terminal, the wireless signal input from the remote control terminal and the H signal are not transmitted.
Since the air conditioner can be controlled by the two systems of the signal input from the A terminal, the operation of the air conditioner was stopped by the signal input from the HA terminal while the air conditioner was operated by the remote controller. Nevertheless, there has been a problem that the operation of the air conditioner is automatically restarted by a periodic operation signal from the remote controller.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an air conditioner which performs operation control by giving priority to a signal from an HA terminal.

[0006]

SUMMARY OF THE INVENTION The present invention has a remote controller for transmitting a signal and a terminal for inputting a signal from a remote control device different from the remote controller, and operates based on these two signals. In the control device for the air conditioner, the remote controller has a function unit that periodically transmits a signal indicating the operation of the air conditioner after the remote controller transmits a signal for starting the operation of the air conditioner. When a signal for stopping the operation of the air conditioner is transmitted from the remote control device to the terminal, after stopping the operation of the air conditioner, the air to be periodically transmitted from the remote controller to the air conditioner. A control unit that disables the signal indicating the operation of the air conditioner is provided, and after inputting the air conditioner operation stop signal from the remote control device, Disable periodic driving signal of the controller is obtained by so as to continue the operation stop of the air conditioner.

[0007]

According to the present invention, the operation of the air conditioner is performed based on the signal transmitted from the remote controller or the signal supplied to the terminal, and the operation of the air conditioner is stopped by the signal supplied to the terminal. After that, the control unit can invalidate the signal indicating the operation of the air conditioner, which is periodically transmitted from the remote controller, to regulate the operation of the air conditioner by the automatic transmission of the remote controller. That is, after the operation stop signal of the air conditioner is input from the remote control device, the periodic operation signal of the remote controller is invalidated, and the operation stop of the air conditioner is continued.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram of an air conditioner (air conditioner) including an indoor unit and an outdoor unit controlled by a control device according to an embodiment of the present invention. In the figure,
1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger provided outdoors, 4 is a capillary tube, 5 is an indoor heat exchanger provided indoors, and 6 is an accumulator. A refrigeration cycle is formed by sequentially connecting the refrigerant pipes in a ring shape. In addition, a blower is provided in each of the outdoor heat exchanger 3 and the indoor heat exchanger 5, and an outdoor heat exchanger,
It promotes heat exchange in outdoor heat exchangers.

According to this air conditioner, when the four-way valve 2 is in the state of the solid line shown in the figure, the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows as shown by the solid line arrow, and the outdoor heat exchange is performed. After the refrigerant is condensed in the heat exchanger 3 and decompressed in the capillary tube 4, the refrigerant is evaporated in the indoor heat exchanger 5 to cool the room.

When the four-way valve 2 is in the state shown by the broken line in the figure, the refrigerant discharged from the compressor 1 flows as shown by the broken line arrow, the refrigerant is condensed in the indoor heat exchanger 5, and The refrigerant evaporates in the heat exchanger 3 to heat the room.

FIG. 2 shows a main part (the indoor unit side) of the control device for controlling the air conditioner shown in FIG. 1, and is configured as follows.

Reference numeral 7 denotes a wireless remote controller, which uses infrared rays as transmission means. The remote controller includes a switch for switching the operation start / stop of the air conditioner each time it is pressed, an operation mode of the air conditioner, a cooling mode C for performing a cooling operation, a heating mode H for performing a heating operation, and a change in room temperature. Cooling / heating mode automatic switching C / that automatically switches between cooling operation and heating operation based on
H, a switch for switching an operation mode such as a ventilation mode F for performing only ventilation, a switch for setting a room temperature, and a display unit (for example, a liquid crystal display) for displaying an operation state (a state operated by a remote controller) of the air conditioner. Display etc.)
Is provided. As these switches, push switches, gray code switches, and the like are used.

After the operation of the air conditioner is performed, the remote controller 7 outputs a signal indicating the operation of the air conditioner, a signal indicating the set temperature, and the detected temperature around the remote controller (room temperature). , A signal indicating an operation mode, and the like are automatically transmitted periodically.

Reference numeral 12 denotes a microprocessor, which can use, for example, TMS2600 manufactured by TI. The microcomputer 12 includes the interface circuit 1
Based on the signal received from the remote controller 7 via the remote controller 3, the program stored in advance is executed. For example, the operation of the air conditioner is started based on a signal from the remote controller, and the ON / OFF of the compressor is controlled based on the room temperature and the set temperature. If a signal from the remote controller cannot be received for a certain period of time during operation, control is performed based on the room temperature detected by the room temperature detector wired to the microcomputer 12.

The interface 13 has a circuit for receiving and demodulating a signal from the remote controller, and outputs the demodulated signal to the microcomputer 12.

Reference numeral 8 denotes an HA terminal, which is connected to the remote control device via a signal line, and receives a signal for starting operation of the air conditioner or a signal for stopping operation of the air conditioner. The signal given to this terminal is taken into the microcomputer 12 via an interface circuit (not shown).

Further, a control signal is transmitted from the microcomputer 12 to the outdoor unit via the interface circuit.

Reference numeral 14 denotes a thermistor element whose internal resistance changes according to the temperature of the indoor heat exchanger, and is provided at a position where the temperature of the indoor heat exchanger can be detected. One end of the temperature detector 14 is connected to an input port A0 (analog input terminal) of the microcomputer after voltage division by a resistor, and the other end is connected to a DC voltage output terminal VDD of the constant voltage power supply 32.

Reference numeral 15 denotes a thermistor element whose internal resistance changes according to the ambient temperature, and is provided at a position where the temperature of the conditioned room can be detected. One end of the temperature detector 15 is connected to an input port A1 (analog input terminal) of the microcomputer after voltage division by a resistor, and the other end is connected to a DC voltage output terminal VDD of a constant voltage power supply 32.

The microcomputer 12 A / D (analog / digital) converts a voltage applied to the input ports A0 and A1 and changing according to the detected temperature, and stores the converted voltage. At this time, the signal value is input a plurality of times, and the average value is stored as the temperature t of the conditioned room, and the temperature is controlled based on the stored value.

Reference numeral 33 denotes a diode bridge for full-wave rectification, which rectifies AC power obtained through a current fuse 35 and a step-down transformer 34. Constant voltage power supply 32
Outputs the power after the full-wave rectified power is smoothed and stabilized.

Reference numeral 16 denotes a buffer circuit.
The relays 18 to 21 are energized and the sounding body (speaker) 17 is driven in accordance with the output of. The sounding body 17 emits a sound based on an output from the microcomputer 12 when a valid signal is received from the remote controller 7 or when an abnormal state occurs.

The relay 18 includes a switching piece 23 and a relay 19
The switching contacts 24 and 25 and the relay 20 each have a normally open contact 26 and are excited by a signal from the microcomputer 12 to switch the contact to a state opposite to that shown in the figure.

By the combination of the opening and closing of the contact pieces 23 to 26, the rotation speed (blowing amount) of the induction motor 28 (blower for the indoor heat exchanger 5 shown in FIG. 1) is stopped, , And four levels of strong wind. Reference numeral 29 denotes an operation capacitor, and reference numeral 30 denotes an opening / closing contact for protecting the temperature of the motor.

Reference numeral 31 denotes a drive motor for driving the wind direction changing plate, which changes the discharge direction of the conditioned air supplied into the room by the induction motor 28. When the contact piece 27 of the relay 21 is closed, the drive motor is energized to change the wind direction cyclically.

Next, a control routine by the microcomputer 12 will be described based on a flowchart. FIG. 3 shows a control routine according to the present embodiment. In step 100, it is determined whether a signal has been input. When a signal is input, it is determined in step 102 whether the signal is input from a remote controller, that is, a signal input from a remote control terminal or a signal input from an HA terminal.

If the signal is a signal input from the HA terminal, in step 104 the signal input to the backup RAM in the microcomputer (operation / stop of the air conditioner)
Is stored, it is determined whether or not the signal input in step 106 indicates stop.

In the case of stop, the operation of the air conditioner is stopped in step 108, and in the case of operation, in step 11
At 0, the operation of the air conditioner is started.

If it is determined in step 102 that the signal is input from the remote controller 7, the signal is periodically transmitted from the remote controller 7 in step 112 or transmitted when the user operates a switch of the remote controller 7. It is determined whether the signal has been received.

When a signal periodically transmitted from the remote controller 7 is inputted, it is determined in step 116 whether or not data is stored in the backup RAM.
The data stored in step 14 is read out. If the data is stopped in step 106, the operation of the air conditioner is stopped in step 108 regardless of the signal from the remote controller.

When the data read from the backup RAM in step 106 is operating, the air conditioner is operated based on the signal transmitted from the remote controller 7 in step 110.

If the backup data is not stored in step 116, the air conditioner is operated based on the signal transmitted from the remote controller 7 in step 118.

At step 112, the remote controller 7
When the data transmitted from the controller is data transmitted by a user's operation, that is, when the signal is input in response to a manual operation of a switch provided on a remote controller, the signal stored in the backup RAM in step 120 That is, the control by the home automation is released by erasing the data, and step 122
In the control according to the button operation of the remote control, for example,
Set temperature, timer operation, operation mode, etc., start operation,
Stop the operation.

As described above, according to this embodiment, H
A signal input from the A terminal is stored, and the stored signal has priority over a signal periodically input from the remote control, and has priority over a signal input according to operation of a switch provided on the remote control. After the air conditioner is controlled from the HA terminal (remote control device), after the air conditioner operation stop signal is input from the HA terminal (remote control device), the periodic operation signal of the remote controller (remote control) is invalidated and the air conditioner is controlled. By continuing the operation stop of the harmonic machine, unintended operation by the home automation and the remote controller is prevented.

[0035]

As described above, according to the first aspect of the present invention, a signal input from a home automation terminal (remote control device) has priority over a signal periodically input from a remote controller (remote control). Therefore, after inputting the air conditioner operation stop signal from the home automation terminal, the periodic operation signal of the remote controller is invalidated and the operation of this air conditioner is continued to stop, In addition, an effect is obtained that an unintended operation is not performed by the remote controller (the air conditioner is erroneously operated).

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an air conditioner using the control device shown in FIG.

FIG. 2 is a block diagram of a control device according to the embodiment of the present invention.

FIG. 3 is a flowchart showing a control routine of the embodiment.

[Explanation of symbols]

 7 Remote controller 8 HA terminal 12 Microcomputer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-29538 (JP, A) JP-A-6-74540 (JP, A) JP-A-60-2835 (JP, A) JP-A-61- 94493 (JP, A) JP-A-5-296546 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 11/02 104

Claims (1)

(57) [Claims] 1. A control device for an air conditioner, comprising: a remote controller for transmitting a signal; and a terminal for inputting a signal from a remote control device different from the remote controller, and operating based on the two signals. After the remote controller transmits a signal to start the operation of the air conditioner, the remote controller has a function unit that periodically transmits a signal indicating the operation of the air conditioner, and the terminal has a terminal from a remote control device. When the signal to stop the operation of the air conditioner is transmitted, after stopping the operation of the air conditioner, a signal representing the operation of the air conditioner to be periodically transmitted from the remote controller to the air conditioner A control unit for disabling the remote control device
After inputting the air conditioner operation stop signal,
Disable the periodic operation signal of the
A control device for an air conditioner, wherein the operation of the air conditioner is continuously stopped .