JP3214110B2 - Indoor / outdoor communication 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 an indoor / outdoor communication control device for a separate type air conditioner.

[0002]

2. Description of the Related Art In a conventional separate type air conditioner, a power supply line and a control line are connected between an indoor unit and an outdoor unit. The system will be described below with reference to the drawings. 6 and 7 are block diagrams of a conventional air conditioner indoor / outdoor communication control device.

In FIG. 6, 1 is an indoor unit, 2 is an outdoor unit, and the power of the air conditioner is supplied to the indoor unit 1. 3 is an indoor / outdoor connection line, 3a is a power supply line, 3b is a DC signal line, 4 is an indoor control unit, 5 is an outdoor control unit, 6
Is an indoor communication means, 7 is an outdoor communication means, 8 is a communication circuit, 8a and 8c are transmission transistors, and 8b and 8d are reception comparators. Here, the indoor / outdoor connection line 3 is configured to be separated into a power supply line 3a and a DC signal line 3b.

In FIG. 7, reference numeral 3 denotes an indoor / outdoor connection line, 8 denotes a communication circuit, and 13 and 14 denote indoor and outdoor power supply synchronizing signal generating means. The communication circuit 8 includes transmission switch elements 8a, 8
c, the receiving elements 8b, 8d are set to 8b
The lower half-wave waveform of the AC voltage is communicated through c, and the upper half-wave waveform of the AC voltage is communicated through 8a and 8d during outdoor transmission. The communication timing is determined by the power synchronization signal generating means 1.
Controlled by 3 and 14.

[0005]

However, the conventional indoor / outdoor communication control device for an air conditioner requires four indoor / outdoor connection lines in the case of a power supply line and a DC signal line, which are compared with three AC signal system lines. This was disadvantageous in terms of cost and workability. In addition, there is a problem that the DC communication circuit is destroyed due to erroneous connection between the power supply line and the DC signal line.

On the other hand, in the AC signal system, a power supply synchronization signal circuit is required, and a 1-bit signal is transmitted, so that the communication speed is low. For example, when the temperature of the indoor heat exchanger becomes high during the heating operation, the compression of the outdoor unit is performed. It is necessary to reduce or stop the rotation speed of the compressor, which causes a problem in terms of the reliability of the compressor and a sense of incongruity due to a delay in remote control operation and actual operation.

Therefore, the present invention improves the workability by securing the reliability of the compressor, realizing high-speed communication that eliminates discomfort caused by delays in remote control operation and actual operation, and using three indoor / outdoor connection lines. It is another object of the present invention to prevent damage to equipment due to incorrect connection between indoor and outdoor units.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an indoor unit, a communication control unit for performing indoor / outdoor communication with an outdoor unit, and switching and receiving elements for transmission and reception from indoor and outdoor. A power supply opening / closing means that has a DC power supply for the communication circuit, a power supply opening / closing means that is turned ON / OFF by an air conditioner operation signal on the power supply unit side, and a communication control on the other unit side of the power supply unit The unit starts from transmission, the communication control unit on the unit side of the power supply unit starts from reception, the communication control unit starts, and the DC power of the communication circuit is supplied from the rectifier from the power supply AC line of the other unit of the power supply unit. The GND line of the communication circuit is shared with one AC power line.

Further, in the present invention, a timer unit is provided in the power supply unit side control unit for the purpose of turning off the power supply opening / closing unit when communication between the inside and outside of the room is not established for a predetermined time.

Further, according to the present invention, the power supply unit side control unit is provided with a communication inability determining means, and when communication between the inside and outside of the room is not established for a certain period of time by the timer means, the power failure is determined by the indoor / outdoor incorrect connection determination by the communication inability determining means. The means is turned off.

[0011]

According to the present invention, in order to perform high-speed communication with three indoor / outdoor connection lines, the communication circuit is DC and transmission / reception from indoor / outdoor is performed.
The GND line of the communication circuit in which each receiving switch element and the receiving element are connected in series is shared with one AC power supply line. In order to protect the communication circuit, the DC power of the communication circuit is supplied from the rectifier from the power supply AC line of the other unit of the power supply unit, and the power supply AC line of the other unit of the power supply unit is connected to the power supply unit side. The power is supplied by the power switching means that is turned ON / OFF by the operation signal of the air conditioner. The communication control unit on the other unit of the power supply unit starts from transmission, and the communication control unit on the unit side of the power supply unit starts from reception. Communication is performed by the communication control means.

Further, according to the present invention, when communication between the inside and outside of the room is not established for a predetermined time due to an incorrect connection or the like, the power supply opening / closing means is turned off by the timer means in the power supply unit side control unit.

Further, according to the present invention, when communication between the inside and outside of the room is not established for a predetermined time by the timer means, the communication disable determination means of the control unit on the power supply unit side determines whether there is a change in H or L of the signal line, and the change is determined. If not, it is determined that communication is not possible due to incorrect connection, and the power supply opening / closing means is turned off.

[0014]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an indoor / outdoor communication control apparatus according to an embodiment of the present invention, and FIG. 2 is a timing chart of transmission / reception signals.

In FIG. 1, 1 is an indoor unit, 2 is an outdoor unit, and the power of the air conditioner is supplied to the indoor unit 1. 3 is an indoor / outdoor connection line, 3a is a power line, 3b is a signal line, 4 is an indoor control unit, 5 is an outdoor control unit, 6 is indoor communication means, 7 is outdoor communication means, and 8 is a communication circuit. 8
a · 8c is a transmission switch element, and 8b · 8d is a reception element. Reference numeral 9 denotes a power supply for a communication circuit, and reference numeral 10 denotes a power supply switching unit. The indoor / outdoor connection line 3 is common to the power supply line 3a (black and white) and the signal line 3b (red and white), and the white line is common to the AC power supply line and the signal line. The communication circuit power supply 9 is composed of a diode, a resistor, and a capacitor from an outdoor AC power supply line.

In FIG. 2, the voltage of the signal line (red-white) has three stages by ON / OFF of the switch element, and when the switch elements 8a and 8c are ON, the voltages V1, 8aOFF and 8cON.
When the voltage is 0, 8aON and 8cOFF, the voltage becomes V2, and when the switch element 8a8c is turned off, the outdoor and indoor signals become active. The voltage V2 is substantially equal to the voltage of the communication circuit power supply 9.

The communication is started by the communication control means on the outdoor side, and the power supply opening / closing means on the indoor side is turned on by the operation signal.
N, and starts when power is supplied to the outdoor side.

FIG. 3 is a block diagram of an indoor / outdoor communication control apparatus according to an embodiment of the present invention.
When the indoor / outdoor communication is not established within a certain time, the indoor power supply opening / closing means is turned off.

FIG. 4 is a block diagram of an indoor / outdoor communication control apparatus according to an embodiment of the present invention, and FIG. 5 is a flowchart. In FIG. 4, reference numeral 11 denotes a timer means, and 12 denotes a communication disable determination means.

In FIG. 5, the communication signal is determined in step 3. In step 4, it is determined whether or not communication has been established at least once in a predetermined time. If not, it is determined in step 5 whether the H and L of the communication signal have changed. In the case of an erroneous connection between the indoor and outdoor connection lines, power is not supplied to the outdoor side and communication does not start. Therefore, the signal level of the reception signal on the indoor side does not change from L even after a certain period of time. On the other hand, if the connection is normal, but the communication is not established due to noise or the like, the signal level changes. In the case of an incorrect connection, the power supply opening / closing means is turned off in step 7 to stop the power supply to the outdoor.

[0022]

According to the present invention, the communication circuit is DC, and the GND line of the communication circuit in which the switch elements for transmission / reception from inside and outside and the reception element are connected in series is shared with one AC power supply line. With this configuration, high-speed communication can be performed with three indoor / outdoor connection lines. For example, when the temperature of the indoor heat exchanger increases during the heating operation, the rotation speed of the compressor of the outdoor unit is reduced or stopped. It is necessary to improve the reliability of the compressor, eliminate the discomfort caused by the delay in remote control operation and actual operation, and improve the workability. Then, the DC power of the communication circuit is supplied from the rectifier from the power AC line of the other unit of the power supply unit,
The power supply AC line of the other power supply unit is turned ON / O by the operation signal of the air conditioner to the power supply unit side.
The power is supplied by the power switching unit that performs FF, and the communication control unit on the other unit side of the power supply unit starts with transmission, and the communication control unit on the unit side of the power supply unit performs communication with the communication control unit that starts with reception. Thereby, the communication circuit can be protected.

Further, according to the present invention, when communication between the inside and outside of the room is not established for a certain period of time, the control unit on the power supply unit turns off the power supply opening / closing means by the timer means, so that the abnormality of the air conditioner due to incorrect connection or the like can be promptly performed. To prevent damage to the equipment and improve reliability.

Further, according to the present invention, when communication between the inside and outside of the room is not established for a predetermined time by the timer means, the communication disable determination means of the control unit on the power supply unit side determines whether there is a change in H or L of the signal line, When communication is not possible due to erroneous connection, the power supply opening / closing means is turned off to prevent damage to the device and improve reliability.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an indoor / outdoor communication control device according to an embodiment of the present invention.

FIG. 2 is a timing chart of the transmission / reception signal.

FIG. 3 is a configuration diagram of an indoor / outdoor communication control device according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of an indoor / outdoor communication control device according to a third embodiment of the present invention.

FIG. 5 is the same flowchart.

FIG. 6 is a configuration diagram of a conventional air conditioner indoor / outdoor communication control device in which a power supply line and a DC signal line are independent.

FIG. 7 is a configuration diagram of a conventional air conditioner indoor / outdoor communication control device using a power supply synchronous signal line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply unit (indoor unit) 2 Power supply other unit (outdoor unit) 3 Indoor / outdoor connection line 4 Indoor control unit 5 Outdoor control unit 6 Indoor communication control means 7 Outdoor communication control means 8 Communication circuit 9 Communication circuit Power supply means 10 power supply opening / closing means 11 timer means 12 communication inability determining means 13 indoor power synchronization signal generating means 14 outdoor power synchronization signal generating means

Continuation of the front page (72) Inventor Shinji Naka 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-146456 (JP, A) JP-A-3-225142 (JP) JP-A-63-306346 (JP, A) JP-A-59-131840 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 11/02 103 F24F 11/02

Claims (3)

(57) [Claims] In a separate type air conditioner which is divided into an indoor unit and an outdoor unit, a communication control unit for performing indoor / outdoor communication for each unit, and a switch element and a reception element for transmission / reception from inside / outside are connected in series. Connected communication circuit,
A power supply opening / closing means which has a DC power supply unit for a communication circuit and which is turned on / off by an operation signal of an air conditioner on the power supply unit side, and a communication control unit on the other unit side of the power supply unit starts from transmission, and The communication control unit on the unit side of the supply unit is communication control means starting from reception, DC power of the communication circuit is supplied from rectification means from the power supply AC line of the other unit of the power supply unit, and the GND line of the communication circuit is connected. An indoor / outdoor communication control device for an air conditioner that is configured to be shared with one AC power supply line. 2. The indoor / outdoor communication control device for an air conditioner according to claim 1, wherein a timer means is provided in the power supply unit side control unit, and the power supply opening / closing means is turned off when indoor / outdoor communication is not established for a predetermined time. 3. The power supply unit-side control section is provided with a communication inability determining means, and when communication between the inside and outside of the room is not established for a predetermined time by the timer means, the power supply opening / closing means is turned off by the indoor / outdoor misconnection determination by the communication inability determining means. The indoor / outdoor communication control device for an air conditioner according to claim 1 or 2 .