JPS6291745A - Signal transmitting device for air-conditioning machine - Google Patents

Abstract

PURPOSE:To obtain a signal transmitting device capable of transmitting and receiving signals in both of indoor and outdoor directions by a method wherein signal elements, operating during a half cycle of an AC electric source, are provided at indoor and outdoor sides. CONSTITUTION:An indoor side transmitting element 13 is consisting of a phototransistor 13B and a photodiode 13A while an indoor side receiving element 14 is consisting of the photodiode 14A and the phototransistor 14B. The elements 18, 19 for transmission and receiving are provided at outdoor side and each of them being consisting of the photodiode 18A and the phototransistor 18B as well as the photodiode 19A and the phototransistor 19B respectively. The phototransistor 13B and the photodiode 14A are connected to the phototransistor 18B and the photodiode 19A in anti-parallel connection mutually while one ends thereof are connected to both ends of an electric source 1 through electric current limiting resistors 15, 20. When an indoor side controller 8 conducts a photocoupler 13 at the half cycle of the electric source 1 to transmit, an outdoor side controller 12 receives it through the photocoupler 19. Then, an outdoor side controller 12 conducts the photocoupler 18 to transmit at the half cycle while the indoor side controller 8 receives it through the photocoupler 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for transmitting signals between indoor equipment and outdoor equipment of a separate air conditioner.

[Conventional technology]

FIG. 3 is a circuit diagram showing a conventional signal transmission device for an air conditioner disclosed in, for example, Japanese Utility Model Application Publication No. 57-12556.

In the figure, 5 (1) is an AC power supply, (2) is an outdoor power line (31, (41) is an outdoor load such as a compressor, an outdoor blower, etc. connected to a power supply (1) K, and (5) is an outdoor power line. A temperature switch consisting of a thermal reed switch that is installed in the room and detects the outside temperature and sends the signal to the indoor side via a signal line (6).
(7) is a photocoupler installed on the indoor side and consisting of a photodiode (7A) and a phototransistor (7B).

The photodiode (7A) is connected to the AC power supply (1) and the signal H+6
Connected between 1 and 1. (8) is an indoor controller which is provided on the indoor side and inputs the signal of the phototransistor (7B).

(9) is a relay that is operated by the output of the indoor controller (8), and (9a) is its normally open contact.
and the power line (3).

Conventional air conditioner signal transmission devices are configured as described above, and when an air conditioner operation command is issued, the indoor controller (8
), the relay (9) is energized and the contact (9a) is closed. Now, the outdoor load (2) operates and air conditioning is performed.

When the outdoor temperature exceeds a certain value, the temperature switch (5)
is closed, the photodiode (7A) is energized and lights up, and the phototransistor (7B) is conductive and sends a signal to the indoor controller (8). Now the indoor controller (8)
4 signals were emitted, and relay (9) was de-energized.

The contact (9a) is opened and the outdoor load (2) is stopped.

In this way, the indoor controller (8) can receive information from outside without contacting the high-voltage AC power source (1).

[Problem that the invention seeks to solve]

The conventional signal transmission device for an air conditioner as described above only transmits information from the outdoor side, such as the outdoor temperature, to the indoor side, and cannot transmit and receive information bidirectionally. It only sends simple signals such as whether the outdoor temperature is above a certain value, and there are problems such as not being able to send or receive a large amount of complex information. This invention solves the above problems. To provide a signal transmission device for an air conditioner which is capable of bidirectionally transmitting and receiving indoor and outdoor information and simultaneously transmitting and receiving a large amount of mutually necessary complex information. With the goal.

[Means for solving problems]

A signal transmission device for an air conditioner according to the present invention is a signal transmission device for an air conditioner.

A transmitting element that can transmit when a voltage is applied in one direction and a receiving element that transmits a received signal when a voltage is applied in the opposite direction to the indoor side and the outdoor side are all installed,
One end of the indoor transmitting element and receiving element is connected to a first terminal of an AC power supply, one end of the outdoor transmitting element and receiving element is connected to a second terminal, and the other ends of each of the transmitting element and receiving element are connected to each other. This is what I did.

[Effect]

In this invention, the signal elements connected in antiparallel to the indoor side and the outdoor side each operate for half a cycle of the AC power supply, so that transmission and reception are performed independently during this period.

〔Example〕

1 and 2 are diagrams showing one embodiment of the present invention, FIG. 1 is a circuit diagram, and FIG. 2 is an operation explanatory diagram.
41, +61. (8+ is similar to the conventional device described above.

In Figure 1, αυ is connected to the power supply (1) and the indoor controller (
8) is an indoor side load such as an indoor blower 2 indicator, which is controlled by 2), an outdoor side controller that is installed on the outdoor side and controls the outdoor side load (2), and αJ is an indoor side controller that is installed on the indoor side and has a voltage in one direction. This element detects and sends a human input signal in a non-contact state when a human input signal is applied. In this embodiment, a photocoupler consisting of a phototransistor (13B) and a photodiode (13A) is used. It is being α
4 is a receiving photocoupler that constitutes the indoor side receiving element, which also consists of a photodiode (14A) and a phototransistor (14B).

Phototransistor (13B) and photodiode (14A)
) are connected in antiparallel to each other, and one end thereof is connected to one end of the power supply (1) via a current limiting resistor α9. The photodiode (13A) is connected to the indoor controller (8) via the current limiting resistor α1, the phototransistor (14B) is connected to the indoor controller (8), and the current limiting resistor (1?l) is connected to the indoor controller (8) via the current limiting resistor α1. It is connected to the DC power supply through the
? - node (18A), phototransistor (18B) and photodiode (19A), phototransistor j1 (1
9B), the phototransistor (18B) and photodiode (19A) are connected in antiparallel to each other, and one end of the photocoupler is connected to the other end of the power supply (1) via a current limiting resistor. ing. In addition, the photodiode (18A) is connected to the outdoor controller α3 via the current limiting resistor 01), and the phototransistor (19B
) is connected to the outdoor controller a'a, and is also connected to a DC power source via a current limiting resistor. Also.

The other ends of the anti-parallel circuit are connected to each other by a signal line (6).

Next, the operation of this embodiment will be explained.

Now, when a signal is issued from the indoor controller (8).

The transmitting photocoupler αJ is conductive. Now the power line (4
) is positive, (1)-(4)-(1)-(19A
) -(6)-(13B)-05-ill, a current flows through the circuit of photocoupler (19), and this received signal is sent to the outdoor controller α2.
Continuing for the half cycle of 1), the outdoor controller α2 detects that the indoor side starts transmitting.

When entering the next half cycle, the polarity of the power supply +1) is reversed and the power line (4) becomes negative, so regardless of the state of the photocoupler α3, the photocoupler (19) becomes non-conducting @ and the secondary From the half cycle, the indoor controller (8) sends a signal, the photocoupler αJ repeats conduction and non-conduction and sends the signal, and the photocoupler αl responds to this by repeating conduction and non-conduction. , the outdoor controller α2 receives the above signal.At this time, since the transmission data is sent in series, information can be sent according to a predetermined code in the data.Furthermore, the end of transmission is also determined by the code. By sending the signal, the outdoor controller a'a can detect the end of the transmission.

Transmission from the outdoor side to the indoor side can be explained in the same way.

The signal from the outdoor controller α is transmitted to the indoor side through the photocoupler a4 during the positive half cycle of the power line (3), and is received by the indoor controller (8) through the photocoupler a4.

FIG. 2 shows the cycle of the power supply (1), M indicates the half cycle in which the power line (4) becomes positive, B indicates the power i +
31 indicates a positive half cycle. Indoor controller (8)
When the photocoupler α3 is made conductive and transmitted in half cycle A, the outdoor controller α2 receives the signal through the photocoupler α [present]. Then, in half cycle B, the outdoor controller α3 conducts the photocoupler α and sends a signal, and the indoor controller α3
) is received via photocoupler α4.

In the example, there is no special restriction on the 2 transmission/reception speed, so
The transmission speed is indoor and outdoor controllers (8).

It is determined by α2. That is, data may be sent one by one for each half cycle during transmission, or data may be sent divided into two time periods during a transmittable half cycle. Furthermore, there is no particular restriction on the means for synchronizing transmission and reception. That is, synchronization may be achieved by mutually sending signals to start transmission and reception, or a separate circuit for generating a synchronization signal from the power supply waveform may be added. Moreover, a timer may be provided in the indoor side and outdoor side controllers (8) 2 α2.

〔Effect of the invention〕

As explained above, in this invention, on the indoor side and the outdoor side,
A transmitting element that can transmit when a voltage is applied in one direction, and a receiving element that transmits a received signal when a voltage is applied in the opposite direction to the above direction are installed, and the transmission is performed during half a cycle of the AC power supply. Since the information is received during the first half cycle, it is possible to transmit and receive information indoors and outdoors in both directions, and a large amount of complex information that is mutually necessary can be transmitted and received simultaneously and independently.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the signal transmission device for an air conditioner according to the present invention, Fig. 2 is an explanatory diagram of the operation of Fig. 1, and Fig. 3 shows a conventional signal transmission device for an air conditioner. It is a circuit diagram. In the figure, (1) is AC power supply, (2) is outdoor load, +3
1. +41 is the power line, (6) is the signal line, (8) is the indoor controller, ill is the indoor load, α2 is the outdoor controller,
(L3 is the indoor side transmitting element (photocoupler), a4 is the indoor side receiving element (photocoupler), and 1 is the outdoor side transmitting element (photocoupler). α9 is the outdoor side receiving element (photocoupler). Note that the same reference numerals are used in Figure 1. indicates the same part.

Claims (2)

[Claims] (1) When there is an input signal from the indoor controller with voltage applied in one direction to the indoor load and the indoor controller that controls it, this is detected in a non-contact manner. An indoor side transmitting element that sends the signal to the indoor controller is installed, and an indoor side receiving element that sends the input signal to the indoor controller in a non-contact state when a voltage is applied in the opposite direction to the above direction.
An outdoor load, an outdoor controller that controls it, and an outdoor transmitter that detects and sends an input signal from the outdoor controller in a non-contact manner when voltage is applied in one direction. and an outdoor receiving element that sends an input signal to the outdoor controller in a non-contact state when a voltage is applied in the opposite direction to the above direction. Connect to a power source, and connect one end of the indoor transmitting element and receiving element to the first terminal of the AC power source,
One end of the outdoor transmitting element and receiving element is connected to a second terminal of the AC power supply, and the other end of the indoor transmitting element and receiving element and the other end of the outdoor transmitting element and receiving element are connected to each other. A signal transmission device for air conditioners. (2) The signal transmission device for an air conditioner according to claim 1, wherein the transmitting element and the receiving element are constructed of photocouplers.