Communication circuit and air conditioner

Abstract

The utility model discloses a communication circuit and an air conditioner, the air conditioner comprises an outdoor unit and a plurality of indoor units, the outdoor unit comprises a first controller, each indoor unit comprises a second controller, the communication circuit comprises a signal receiving module and a plurality of signal sending modules, and the signal receiving module is connected with each signal sending module. Each signal sending module is used for being connected with a first controller, and each signal sending module is used for being correspondingly connected with a second controller; the signal sending module is used for conducting according to a control signal output by the first controller; and the signal receiving module is used for receiving the communication signal output by the corresponding second controller when the corresponding signal sending module is switched on. The problem that a communication circuit structure between one outdoor unit and multiple indoor units is complex at present can be relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and in particular to a communication circuit and an air conditioner. BACKGROUND

[0002] In air conditioning applications, when one outdoor unit corresponds to multiple indoor units, each indoor unit usually needs a separate current loop communication circuit to the outdoor unit to achieve independent control of each indoor unit by the outdoor unit. The topology of such a circuit is complex, and more components are required, increasing costs.

[0003] Therefore, the current technology needs to be improved and improved. CONTENT OF THE INVENTION

[0004] The present application provides a communication circuit and an air conditioner, which can effectively alleviate the problem of complex communication circuit structure between one outdoor unit and multiple indoor units.

[0005] The present application provides a communication circuit, which is applied to an air conditioner, the air conditioner comprising an outdoor unit and multiple indoor units, the outdoor unit comprising a first controller, each indoor unit comprising a second controller, the communication circuit comprising a signal receiving module and multiple signal sending modules, the signal receiving module being connected with each signal sending module, each signal sending module being used for connection with the first controller, and each signal sending module being used for corresponding connection with one second controller.

[0006] The signal sending module is used for conduction according to the control signal output by the first controller; and the signal receiving module is used for receiving the communication signal output by the corresponding second controller when the corresponding signal sending module is turned on.

[0007] In some embodiments, the communication circuit, the signal sending module comprises a signal sending unit and an isolation unit, the signal sending unit being connected with the first controller and the isolation unit respectively; the signal sending unit is used for receiving the control signal and controlling the isolation unit to be turned on according to the control signal output by the first controller.

[0008] In some embodiments, the communication circuit, the signal sending module further comprises a protection unit, the protection unit being connected with the isolation unit; the protection unit is further used for connection with the corresponding second controller.

[0009] In some embodiments, the communication circuit, the signal sending unit comprises a first resistor, a second resistor and a switch tube, one end of the first resistor being connected with the first controller, the other end of the first resistor and the other end of the second resistor being connected with the first end of the switch tube, the second end of the switch tube being connected with the isolation unit, and the third end of the switch tube and the other end of the second resistor being grounded.

[0010] The communication circuit in some embodiments, the isolation unit comprises a first optocoupler, the first end of the first optocoupler is connected to the power supply, the second end of the first optocoupler is connected to the signal sending unit, the third end of the first optocoupler is connected to the signal receiving module, and the fourth end of the first optocoupler is used to be connected to the corresponding second controller.

[0011] The communication circuit in some embodiments, the isolation unit further comprises a third resistor, a fourth resistor and a capacitor, one end of the third resistor is connected to the power supply, the other end of the third resistor, one end of the fourth resistor and one end of the capacitor are connected to the first end of the first optocoupler, and the other end of the fourth resistor and the other end of the capacitor are connected to the second end of the first optocoupler.

[0012] The communication circuit in some embodiments, the switch tube comprises a triode, the first end of the switch tube is the base of the triode, the second end of the switch tube is the second end of the triode and the collector of the triode, and the third end of the switch tube is the emitter of the triode.

[0013] The communication circuit in some embodiments, the protection unit comprises a zener diode and a thermistor, the positive electrode of the zener diode is connected to the corresponding second controller, one end of the thermistor is connected to the negative electrode of the zener diode, and the other end of the thermistor is connected to the isolation unit.

[0014] The communication circuit in some embodiments, the signal receiving module comprises a second optocoupler, the first end of the second optocoupler is connected to the isolation unit, the second end of the second optocoupler is connected to the power supply, the third end of the second optocoupler is connected to the ground, and the fourth end of the second optocoupler is connected to the first controller.

[0015] The air conditioner in an embodiment of the application comprises the above communication circuit.

[0016] The communication circuit and the air conditioner provided by the application, the communication circuit comprises a signal receiving module and a plurality of signal sending modules, the signal sending module is used to be turned on according to the control signal output by the first controller, the signal receiving module is used to form a communication loop between the outdoor unit and the corresponding indoor unit through the signal sending module when the corresponding signal sending module is turned on, so as to receive the communication signal output by the corresponding second controller. In the embodiment, only one signal receiving module is arranged relative to the arrangement of one signal receiving module for each indoor unit, so that the plurality of indoor units share the signal receiving module, thereby simplifying the structure of the communication circuit and facilitating cost reduction. BRIEF DESCRIPTION OF DRAWINGS

[0017] The technical scheme and other beneficial effects of the application will be apparent from the following detailed description of the specific embodiments of the application combined with the drawings.

[0018] Figure 1The structural block diagram of the communication circuit provided by the embodiment of the present application is shown in FIG. 1.

[0019] Figure 2 The structural block diagram of the first embodiment of the signal sending module in the communication circuit provided by the embodiment of the present application is shown in FIG. 2.

[0020] Figure 3 The structural block diagram of the second embodiment of the signal sending module in the communication circuit provided by the embodiment of the present application is shown in FIG. 3.

[0021] Figure 4 The circuit diagram of the communication circuit provided by the embodiment of the present application is shown in FIG. 4. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0023] In addition, the terms "first", "second" are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, so that the features with "first" and "second" can explicitly or implicitly include one or more features, and in the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0024] Please refer to Figure 1 The embodiment of the present application provides a communication circuit, which is applied to an air conditioner. The air conditioner includes an outdoor unit and multiple indoor units. The outdoor unit is provided with a first controller 11, each indoor unit is provided with a second controller 12, and the communication between the outdoor unit and the multiple indoor units is realized by the communication circuit.

[0025] The communication circuit includes the signal receiving module 22 and a plurality of signal sending modules 21, the number of the signal sending modules 21 corresponds to the indoor units one by one, each signal sending module 21 is connected to a second controller 12, each signal sending module 21 is connected to the first controller 11, and only one signal receiving module 22 is arranged for the plurality of second controllers 12, the signal receiving module 22 is connected to each signal sending module 21 and the first controller 11, and the first controller 11 receives the communication signals of different second controllers 12 through the signal receiving module 22. Specifically, the signal sending module 21 is used to turn on according to the control signal output by the first controller 11; the signal receiving module 22 is used to form a communication loop between the outdoor unit and the corresponding indoor unit through the signal sending module 21 when the corresponding signal sending module 21 is turned on, so as to receive the communication signal output by the corresponding second controller 12.

[0026] When the outdoor unit needs to establish a communication connection with any indoor unit, the signal sending module 21 of the corresponding outdoor unit is turned on by the first controller 11 of the outdoor unit, at this time the second controller 12 of the corresponding outdoor unit sends a communication signal to the signal sending module 21, the signal sending module 21 outputs the communication signal to the signal receiving module 22 of the outdoor unit, the signal receiving module 22 receives the communication signal, and the communication between the outdoor unit and any indoor unit is realized. In the embodiment, compared with arranging one signal receiving module 22 for each indoor unit, only one signal receiving module 22 is arranged, so that the plurality of indoor units share the signal receiving module 22, thereby simplifying the structure of the communication circuit and being conducive to reducing the cost.

[0027] Please refer to Figure 2 In some embodiments, the signal sending module 21 includes a signal sending unit 211 and an isolation unit 212, the signal sending unit 211 is connected to the first controller 11 and the isolation unit 212 respectively; the signal sending unit 211 is used to receive a control signal and control the isolation unit 212 to turn on according to the control signal output by the first controller 11, the corresponding second controller 12 transmits a communication signal to the signal receiving module 22 through the turned-on isolation unit 212, and the signal receiving module 22 outputs the communication signal to the first controller 11, thereby realizing the communication between the outdoor unit and the indoor unit.

[0028] Please refer to Figure 3 In some embodiments, the signal sending module 21 further includes a protection unit 213, the protection unit 213 is connected to the isolation unit 212; the protection unit 213 is also used to be connected to the corresponding second controller 12. The protection unit 213 in the embodiment is connected in series between the corresponding second controller 12 and the isolation unit 212, so as to realize the anti-reverse connection protection.

[0029] Please refer to Figure 4In some embodiments, the signal sending unit 211 comprises a first resistor R1, a second resistor R2 and a switch tube Q1, one end of the first resistor R1 is connected with the first controller 11, the other end of the first resistor R1 and the other end of the second resistor R2 are both connected with the first end of the switch tube Q1, the second end of the switch tube Q1 is connected with the isolation unit 212, the third end of the switch tube Q1 and the other end of the second resistor R2 are both grounded. In this embodiment, multiple signal sending units 211 are provided for multiple indoor units, and the multiple signal sending units 211 are connected to different communication ports of the first controller 11. For example, five indoor units are provided, and five signal sending modules 21 are provided correspondingly, and the signal sending units 211 in the five signal sending modules 21 are connected to five communication ports of the first controller 11, such as TXD1, TXD2, TXD3, TXD4 and TXD5, that is, the first end of the switch tube Q1 is connected to the corresponding communication port of the first controller 11. The first controller 11 outputs a control signal through the corresponding communication port to control the conduction or disconnection of the switch tube Q1, so as to control the conduction or disconnection of the isolation unit 212.

[0030] In some embodiments, the isolation unit 212 comprises a first optoelectronic coupler PC1, the first end of the first optoelectronic coupler PC1 is connected to the ground, the second end of the first optoelectronic coupler PC1 is connected with the signal sending unit 211, the third end of the first optoelectronic coupler PC1 is connected with the signal receiving module 22, and the fourth end of the first optoelectronic coupler PC1 is used to be connected with the corresponding second controller 12. When the switch tube Q1 connected with the first optoelectronic coupler PC1 is turned on, the first end and the second end of the first optoelectronic coupler PC1 to the ground end form a path, and the first optoelectronic coupler PC1 is turned on; when the switch tube Q1 connected with the first optoelectronic coupler PC1 is disconnected, the first end and the second end of the first optoelectronic coupler PC1 to the ground end are disconnected, and the first optoelectronic coupler PC1 is disconnected.

[0031] In some embodiments, the isolation unit 212 comprises a first optoelectronic coupler PC1, the first end of the first optoelectronic coupler PC1 is connected to the ground, the second end of the first optoelectronic coupler PC1 is connected with the signal sending unit 211, the third end of the first optoelectronic coupler PC1 is connected with the signal receiving module 22, and the fourth end of the first optoelectronic coupler PC1 is used to be connected with the corresponding second controller 12. When the switch tube Q1 connected with the first optoelectronic coupler PC1 is turned on, the first end and the second end of the first optoelectronic coupler PC1 to the ground end form a path, and the first optoelectronic coupler PC1 is turned on; when the switch tube Q1 connected with the first optoelectronic coupler PC1 is disconnected, the first end and the second end of the first optoelectronic coupler PC1 to the ground end are disconnected, and the first optoelectronic coupler PC1 is disconnected.

[0032] As an embodiment, the switch tube Q1 comprises a triode, the first end of the switch tube Q1 is the base of the triode, the second end of the switch tube Q1 is the second end of the triode and the collector of the triode, and the third end of the switch tube Q1 is the emitter of the triode. Of course, in other embodiments, a switch tube Q1 with the same function can also be selected, which is not limited in the present application.

[0033] As an embodiment, the protection unit 213 comprises a Zener diode ZD1 and a thermistor PTC1, the positive pole of the Zener diode ZD1 is connected with the corresponding second controller 12, one end of the thermistor PTC1 is connected with the negative pole of the Zener diode ZD1, and the other end of the thermistor PTC1 is connected with the fourth end of the first optocoupler PC1. In the embodiment, by connecting the thermistor PTC1 and the Zener diode ZD1 in series between the indoor unit and the isolation unit 212, the effective protection of the communication circuit is facilitated, and the reliability of the communication circuit is improved.

[0034] In some embodiments, the signal receiving module 22 comprises a second optocoupler PC2, the first end of the second optocoupler PC2 is connected with the isolation unit 212, the second end of the second optocoupler PC2 is connected with electricity, the third end of the second optocoupler PC2 is connected with the ground, and the fourth end of the second optocoupler is connected with the first controller 11. In the embodiment, the fourth end of the second optocoupler PC2 is connected with the communication port RXD11 of the first controller 11, when any first optocoupler PC1 connected with the third end of the second optocoupler PC2 is turned on, the corresponding indoor unit transmits the communication signal to the outdoor unit through the first optocoupler PC1 and the second optocoupler PC2, thereby realizing that multiple second controllers 12 share one signal receiving module 22. As shown in the figure, if one outdoor unit needs to establish a communication connection with five indoor units, the ports of the five second controllers 12 connected with the five signal sending modules 21 are AT, BT, CT, DT and ET respectively. Figure 4

[0035] The present application also provides an air conditioner, which comprises the above-mentioned communication circuit, and since the communication circuit has been described in detail above, no further description is given here.

[0036] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0037] ​The communication circuit provided by the embodiments of the present application is described in detail above, and the principle and implementation manner of the present application are described by applying specific examples. The above embodiment description is only used to help understand the technical solutions of the present application and the core idea thereof. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced by equivalents, and the modification or replacement does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A communication circuit applied to an air conditioner, the air conditioner comprising an outdoor unit and a plurality of indoor units, the outdoor unit comprising a first controller, each of the indoor units comprising a second controller, characterized in that, The communication circuit comprises a signal receiving module and a plurality of signal sending modules, the signal receiving module is connected with each of the signal sending modules, each of the signal sending modules is used for being connected with a first controller, and each of the signal sending modules is used for being connected with a corresponding second controller; The signal sending module is used for being turned on according to a control signal output by the first controller, and the signal receiving module is used for receiving a communication signal output by the corresponding second controller when the corresponding signal sending module is turned on.

2. The communication circuit of claim 1, wherein The signal sending module comprises a signal sending unit and an isolation unit, the signal sending unit is connected with the first controller and the isolation unit respectively, the signal sending unit is used for receiving the control signal, and the signal sending unit is used for controlling the isolation unit to be turned on according to the control signal output by the first controller.

3. The communication circuit of claim 2, wherein, The signal sending module further comprises a protection unit, the protection unit is connected with the isolation unit, and the protection unit is further used for being connected with the corresponding second controller.

4. The communication circuit of claim 2, wherein, The signal sending unit comprises a first resistor, a second resistor and a switch tube, one end of the first resistor is connected with the first controller, the other end of the first resistor and the other end of the second resistor are connected with a first end of the switch tube, a second end of the switch tube is connected with the isolation unit, a third end of the switch tube and the other end of the second resistor are grounded.

5. The communication circuit of claim 2, wherein, The isolation unit comprises a first optoelectronic coupler, a first end of the first optoelectronic coupler is connected with electricity, a second end of the first optoelectronic coupler is connected with the signal sending unit, a third end of the first optoelectronic coupler is connected with the signal receiving module, and a fourth end of the first optoelectronic coupler is used for being connected with the corresponding second controller.

6. The communication circuit of claim 5, wherein, The isolation unit further comprises a third resistor, a fourth resistor and a capacitor, one end of the third resistor is connected with electricity, the other end of the third resistor, one end of the fourth resistor and one end of the capacitor are connected with a first end of the first optoelectronic coupler, the other end of the fourth resistor and the other end of the capacitor are connected with a second end of the first optoelectronic coupler.

7. The communication circuit of claim 4, wherein, The switch tube comprises a triode, the first end of the switch tube is a base of the triode, the second end of the switch tube is a second end of the triode and a collector of the triode, and the third end of the switch tube is an emitter of the triode.

8. The communication circuit of claim 3, wherein, The protection unit comprises a voltage stabilizing diode and a thermistor, a positive electrode of the voltage stabilizing diode is connected with the corresponding second controller, one end of the thermistor is connected with a negative electrode of the voltage stabilizing diode, and the other end of the thermistor is connected with the isolation unit.

9. The communication circuit of any of claims 2-8, wherein, The signal receiving module comprises a second optoelectronic coupler, a first end of the second optoelectronic coupler is connected with the isolation unit, a second end of the second optoelectronic coupler is connected with electricity, a third end of the second optoelectronic coupler is grounded, and a fourth end of the second optoelectronic coupler is connected with the first controller.

10. An air conditioner characterized by comprising: The air conditioner comprises the communication circuit according to any one of claims 1 to 9.

Images