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Air conditioning system
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A technology for air conditioners and indoor units, applied in transmission systems, baseband systems, digital transmission systems, etc., can solve problems such as low speed, and achieve the effect of high-speed data transmission
Active Publication Date: 2020-01-17
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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Problems solved by technology
[0002] In the past, the communication network of the air conditioner system was mainly used to transmit a small amount of information such as the operating status of the outdoor unit and indoor unit, and control commands, so it was slower than Ethernet (registered trademark) such as 100BASE-T and optical fiber communication.
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no. 1 approach
[0029] figure 1 It is a figure which shows the communication system of the air conditioner system 1 which concerns on 1st Embodiment of this invention.
[0030] The air conditioner system 1 includes an air conditioner including indoor units 10 a , 10 b , 10 c , and 10 d , an outdoor unit 20 , and communication cables 31 , 32 . The communication cables 31, 32 carry out serial data transmission by means of differential signals, so vinyl-coated twin-core cables or twisted-pair cables are used. The indoor units 10a, 10b, 10c, and 10d and the outdoor unit 20 are connected in chain (also referred to as through wiring) through communication cables 31 and 32 to transmit and receive the same signal, and a so-called serial bus system is adopted. Communication cables 31 and 32 correspond to transmission lines.
[0031] The indoor unit 10a includes inductors 11, 12, communication cable terminals 18a, 18b, transmission path switches 13a, 13b, 13c, communication cable terminals 19a, 19b, ...
no. 2 approach
[0088] Next, an air conditioner system 100 according to a second embodiment of the present invention will be described.
[0089] Image 6 It is a diagram showing the communication network of the air conditioner system 100 .
[0090] exist Image 6 In , the state where the outdoor unit and the indoor unit are connected to a free communication network topology based on a hybrid of chain wiring and star branch wiring is shown.
[0091] The air conditioner system 1 includes outdoor units 20a, 20b, indoor units 10a-10i, communication cables 30a, 30b, 30c connecting the outdoor unit 20a and the indoor units 10a-10i, and a terminal resistor 21 connected to the outdoor unit 20a. When there are two outdoor units 20a and 20b in the communication network, the terminating resistor 21 is connected to either one in advance. In this air conditioner system 100, the indoor unit 20a is in charge of the refrigerant system for the indoor units 10a to 10d, 10e, 10f, and 10i, and the other outdo...
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Abstract
The present invention provides a technique capable of achieving a high-speed data transfer in communication between a large number of outdoor and indoor machines connected to a free communication network topology. An indoor machine 10a comprises: a communication cable terminal 18a to which a communication cable 31 connected to an indoor machine 10b is connected; a communication cable terminal 18bto which a communication cable 31 connected to an indoor machine 10c is connected; a transfer line switch 13a connected to the communication cable terminal 18a; a transfer line switch 13b connected tothe communication cable terminal 18b; and an inductor 11 connected between the transfer line switch 13a and the transfer line switch 13b. Indoor control units 15 each activate the transfer line switch 13a and the transfer line switch 13b between a state in which the communication cable terminal 18a and the communication cable terminal 18b are short-circuited and a state in which the communicationcable terminal 18a and the communication cable terminal 18b are connected to each other via a delay element 11.
Description
technical field [0001] The present invention relates to an air conditioner system that is wired between devices and controlled through communication. Background technique [0002] In the past, the communication network of the air conditioner system was mainly used to transmit a small amount of information such as the operating status of the outdoor unit and indoor unit and control commands, so it was slower than Ethernet (registered trademark) such as 100BASE-T and optical fiber communication. In addition, long distances between devices require a large amount of wiring, so instead of using a modulated carrier method using a high-frequency cable such as a coaxial cable, cost reduction is achieved by using a baseband transmission method. [0003] On the other hand, in recent years, with the complexity of facilities and equipment and the diversification of transmission information, it is required to support high-speed serial data transmission. [0004] It is known that when se...
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Application Information
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