CN216432047U - Indoor and outdoor unit communication circuit and air conditioner - Google Patents
Indoor and outdoor unit communication circuit and air conditioner Download PDFInfo
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- CN216432047U CN216432047U CN202122721159.0U CN202122721159U CN216432047U CN 216432047 U CN216432047 U CN 216432047U CN 202122721159 U CN202122721159 U CN 202122721159U CN 216432047 U CN216432047 U CN 216432047U
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Abstract
The utility model discloses an indoor outdoor set communication circuit and air conditioner, indoor outer machine communication circuit, include: an indoor circuit board, an outdoor circuit board and an on-line; the power supply module is arranged on the indoor circuit board; an indoor communication module; an outdoor communication module; the indoor circuit board is connected with the outdoor circuit board through an on-line wire so that the power supply module, the outdoor communication module and the indoor communication module form a communication loop; the zero crossing point detection module is arranged on the indoor circuit board and used for detecting the zero crossing point of the input electric signal of the power supply module and generating a zero crossing point detection signal; and the main control module is connected with the indoor communication module, the outdoor communication module and the zero crossing point detection module and is used for controlling the communication states of the indoor communication module and the outdoor communication module according to the zero crossing point detection signal. By adopting the indoor and outdoor unit communication circuit, the voltage loss on the online line can be avoided, and the reliability of communication is improved.
Description
Technical Field
The utility model belongs to the technical field of the air conditioning technique and specifically relates to an indoor outdoor set communication circuit and air conditioner are related to.
Background
In the related art, indoor and outdoor communication is realized by a current loop communication technology based on a zero line, specifically, a power supply is formed by reducing voltage through a live line L-zero line N, the reference point of the power supply is the zero line N, a command is sent to an outdoor unit by an indoor unit based on a communication protocol, and the outdoor unit replies data based on the received command, so that communication is realized.
However, the communication method is based on the communication of the zero line N, and if the length of the online line between the indoor unit and the outdoor unit is within a certain distance, for example, within 20m, the communication can be realized, but when the length of the online line exceeds a certain distance, for example, exceeds 30m, the normal communication between the indoor unit and the outdoor unit is difficult, and thus the installation between the indoor unit and the outdoor unit with an excessively long online line length cannot be realized. In addition, if the running current of the whole air conditioner is large, the communication signal is also influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an indoor outdoor set communication circuit, adopt this indoor outer machine communication circuit can avoid the online voltage loss, promote the reliability of communication.
The second objective of the present invention is to provide an air conditioner.
In order to solve the above problem, the utility model discloses indoor outer quick-witted communication circuit of first aspect embodiment includes: an indoor circuit board, an outdoor circuit board and an on-line; the power supply module is arranged on the indoor circuit board; the indoor communication module is arranged on the indoor circuit board and is connected with the power supply module; an outdoor communication module disposed on the outdoor circuit board; the indoor circuit board is connected with the outdoor circuit board through the online line, so that the power module, the outdoor communication module and the indoor communication module form a communication loop; the zero crossing point detection module is arranged on the indoor circuit board and used for detecting the zero crossing point of the input electric signal of the power supply module and generating a zero crossing point detection signal; the main control module is connected with the indoor communication module, the outdoor communication module and the zero crossing point detection module and used for controlling the communication state of the indoor communication module and the outdoor communication module according to the zero crossing point detection signal.
According to the utility model discloses an indoor outer quick-witted communication circuit, through crossing zero crossing point of detection module discernment input signal of telecommunication, and generate crossing zero point detected signal, and then host system confirms the size of input signal of telecommunication according to crossing zero point detected signal to can control indoor communication module and outdoor communication module and communicate when the input signal of telecommunication is great, control indoor communication module when the input signal of telecommunication is less with outdoor communication module pause communication, from this, can effectively avoid the voltage loss on the online, promote the reliability of communication.
In some embodiments, a first neutral connection and a first live connection are disposed on the indoor circuit board; the zero-crossing point detection module includes: the first end of the first current limiting unit is connected with the first live wire connecting end; the first end of the isolation unit is connected with the second end of the first current limiting unit, the second end of the isolation unit is connected with the first zero line connecting end, the third end of the isolation unit is connected with a preset power supply, the fourth end of the isolation unit is grounded, and the output end of the isolation unit is connected with the main control module to output the zero crossing point detection signal.
In some embodiments, the isolation unit comprises: the anode of the first diode is connected with the first zero line connecting end, and the cathode of the first diode is connected with the second end of the first current limiting unit; a first end of the first optical coupler is connected with a second end of the first current limiting unit, a second end of the first optical coupler is connected with the first zero line connecting end, and a fourth end of the first optical coupler is grounded; a first end of the first resistor is connected with the preset power supply, and a second end of the first resistor is connected with a third end of the first optocoupler; and an output end of the isolation unit is arranged between the third end of the first optocoupler and the second end of the first resistor.
In some embodiments, the indoor circuit board is provided with a first neutral connection terminal and a first live connection terminal, and the power module includes: the first end of the voltage division unit is connected with the first live wire connecting end; the first end of the rectifying unit is connected with the second end of the voltage dividing unit; and the first end of the voltage stabilizing unit is connected with the second end of the rectifying unit, the second end of the voltage stabilizing unit is connected with the indoor communication module, and the third end of the voltage stabilizing unit is connected with the first zero line connecting end.
In some embodiments, the voltage stabilization unit includes: a first end of the voltage stabilizing diode is connected with a second end of the rectifying unit; and the first end of the capacitor is connected with the first end of the voltage stabilizing diode and the indoor communication module, and the second end of the capacitor is connected with the first zero line connecting end.
In some embodiments, the indoor circuit board is provided with a first signal connecting end, and the outdoor circuit board is provided with a second signal connecting end and a second zero line connecting end;
the indoor communication module includes: a first end of the second current limiting unit is connected with a first end of the capacitor; a first end of the first communication unit is connected with a second end of the second current limiting unit, a second end of the first communication unit is connected with the first signal connection end, and a control end of the first communication unit is connected with the main control module;
the outdoor communication module includes: a first end of the second current limiting unit is connected with the second signal connecting end; and the first end of the second communication unit is connected with the second end of the third current limiting unit, the second end of the second communication unit is connected with the second zero line connecting end, and the control end of the second communication unit is connected with the main control module.
In some embodiments, the first communication unit comprises: a first end of the second optical coupler is connected with a second end of the second current limiting unit, and a control end of the second optical coupler is connected with the main control module and used for receiving a first communication signal sent by the outdoor communication module; the first end of the third optical coupler is connected with the second end of the second optical coupler, the control end of the third optical coupler is connected with the main control module, and the second end of the third optical coupler is connected with the first signal connecting end and used for sending a second communication signal to the outdoor communication module.
In some embodiments, the second communication unit comprises: a first end of the fourth optical coupler is connected with a second end of the third current limiting unit, and a control end of the fourth optical coupler is connected with the main control module and used for receiving the second communication signal; and a first end of the fifth optical coupler is connected with a second end of the fourth optical coupler, a second end of the fifth optical coupler is connected with the second zero line connecting end, and a control end of the fifth optical coupler is connected with the main control module and used for sending the first communication signal.
In some embodiments, the online line includes a live wire connecting line, a zero line connecting line and a signal connecting line, a second live wire connecting end is arranged on the indoor circuit board, a third live wire connecting end is arranged on the outdoor circuit board, the first zero line connecting end passes through the zero line connecting line and is connected with the second zero line connecting end, the second live wire connecting end passes through the live wire connecting line and is connected with the third live wire connecting end, and the first signal connecting end passes through the signal connecting line and is connected with the second signal connecting end.
An embodiment of the second aspect of the present invention provides an air conditioner, including: an indoor unit and an outdoor unit; in the communication circuit between the indoor unit and the outdoor unit according to the embodiment, the indoor unit communicates with the outdoor unit based on the communication circuit between the indoor unit and the outdoor unit.
According to the utility model discloses an air conditioner provides other indoor outer machine communication circuit through adopting above-mentioned embodiment and realizes the communication between indoor set and the off-premises station, can effectively avoid the voltage loss on the online, promotes the reliability of communication.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of an indoor-outdoor communication circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a zero crossing point detection module according to an embodiment of the present invention;
fig. 3 is a waveform diagram of an input ac current of an indoor-outdoor communication circuit according to an embodiment of the present invention;
fig. 4 is a waveform diagram of voltage developed by equivalent impedance of an on-line wire according to an embodiment of the present invention;
fig. 5 is a voltage waveform diagram of a power module according to an embodiment of the present invention;
fig. 6 is a waveform diagram of effective voltages in an indoor-outdoor communication circuit according to an embodiment of the present invention;
fig. 7 is a waveform diagram of a zero crossing point detection signal of the zero crossing point detection module according to an embodiment of the present invention;
fig. 8 is a block diagram of an air conditioner according to an embodiment of the present invention.
Reference numerals:
an indoor-outdoor unit communication circuit 10; an air conditioner 100;
an indoor circuit board 1; an outdoor circuit board 2; an on-line 3; a power supply module 4; an indoor communication module 5; an outdoor communication module 6; a zero crossing point detection module 7; a main control module 8; a first current limiting unit 71; an isolation unit 72; a voltage dividing unit 41; a rectifying unit 42; a voltage stabilization unit 43; a second current limiting unit 51; a first communication unit 52; a third current limiting unit 61; a second communication unit 62; a live connection line 31; a neutral connection 32; a signal connection line 33;
an indoor unit 20; and an outdoor unit 30.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
In order to solve the above problem, the communication circuit for indoor and outdoor units according to the first aspect of the present invention,
the communication circuit for the indoor and outdoor units according to the embodiment of the present invention is described below with reference to fig. 1 to 2.
As shown in fig. 1 and 2, the indoor and outdoor unit communication circuit 10 includes an indoor circuit board 1, an outdoor circuit board 2, a connection line 3, a power module 4, an indoor communication module 5, an outdoor communication module 6, a zero-crossing point detection module 7, and a main control module 8.
Wherein, the power module 4 is arranged on the indoor circuit board 1; the indoor communication module 5 is arranged on the indoor circuit board 1 and connected with the power module 4; the outdoor communication module 6 is arranged on the outdoor circuit board 2; the indoor circuit board 1 is connected with the outdoor circuit board 2 through the on-line wire 3, so that the power module 4, the indoor communication module 5 and the outdoor communication module 6 form a communication loop; the zero crossing point detection module 7 is arranged on the indoor circuit board 1 and used for detecting the zero crossing point of the input electric signal of the power supply module 4 and generating a zero crossing point detection signal; the main control module 8 is connected with the indoor communication module 5, the outdoor communication module 6 and the zero crossing point detection module 7, and is used for controlling the communication states of the indoor communication module 5 and the outdoor communication module 6 according to the zero crossing point detection signal.
Specifically, when the length of the connecting line 3 is long, for example, the length of the connecting line 3 is greater than 20m, the line impedance of the connecting line 3 may not be ignored, the line impedance of the connecting line 3 may be denoted as R, in this case, when the whole machine is running, the running current on the outdoor circuit board 2 is IAC, for example, fig. 3 shows a waveform diagram of the running current IAC, and after the running current IAC passes through the on-line 3, based on the equivalent impedance of the on-line 3, the voltage value lost at the connection line 3 is VBN, which is VB-VN, for example as shown in fig. 4, and the power supply module 4 is used as the working power supply of the indoor communication module 5 and the outdoor communication module 6, which is a stable dc voltage value VAN, VA-VN, as shown in fig. 5, for example, and therefore, the effective voltage value across the communication loop is VAB, VA-VB-VAN-VBN, for example, as shown in fig. 6.
As can be seen from the above description, referring to fig. 2 to 6, the direction of the operating current IAC is different, and the effective voltage VAB across the communication circuit is different, for example, at the zero-crossing point, the operating current IAC is equal to 0, and at this time, the effective voltage VAB across the communication circuit is substantially equal to the dc voltage value VAN of the power module 4, that is, VAB2 is equal to VAN; when the voltage value VBN generated by the operating current IAC at the connecting line 3 is offset from the dc voltage value VAN of the power supply module 4, VAB1 is equal to VAN-VBN, i.e., VAB1< VAN; when the voltage VBN generated by the operating current IAC at the connecting line 3 and the dc voltage VAN of the power supply module 4 increase, VAB3 is equal to VAN + VBN, i.e., VAB3> VAN. In addition, as the online cable 3 is longer, the VAB1 value is smaller, which results in insufficient voltage of the communication loop and unable normal communication, and the VAB3 value is larger, the voltage of the communication loop is higher, the communication current is larger, and the anti-interference performance is stronger, therefore, based on the above principle, in order to avoid the communication loop to communicate in the interval from VAB1 to VAB2, which is a smaller voltage interval, the utility model provides the zero crossing point detection module 7 to detect the zero crossing point of the input electrical signal of the power module 4 and generate the zero crossing point detection signal V0 to identify the smaller voltage interval, for example, as shown in fig. 7, the zero crossing point detection module 7 detects the zero crossing point of the input electrical signal and determines that the voltage interval is lower, the zero crossing point detection signal V0 is output at low level, the master control module 8 determines that the communication current in the communication loop is reduced according to the received low level, thereby controlling the indoor communication module 5 to suspend communication with the outdoor communication module 6; the zero crossing point detection module 7 detects that the zero crossing point of the input electric signal is determined to be within a range from VAB2 to VAB3 under the condition that the voltage range is high, the output zero crossing point detection signal V0 is high level, the main control module 8 determines that the communication current in the communication loop is increased according to the received high level, and therefore the indoor communication module 5 is controlled to communicate with the outdoor communication module 6, therefore, voltage loss on the online line can be effectively avoided, interference of the online line is avoided, the reliability of communication is improved, and online installation of a long online line is facilitated.
It should be noted that, when the length of the online line 3 is short, for example, the length of the online line 3 is less than 20 meters, the line impedance of the online line 3 is negligible, and the indoor communication module 5 and the outdoor communication module 6 can achieve normal communication.
According to the utility model discloses an indoor outer quick-witted communication circuit 10, through the zero crossing point of the zero crossing point detection module 7 discernment input signal of telecommunication, and generate the zero crossing point detection signal, and then host system 8 confirms the size of the input signal of telecommunication according to the zero crossing point detection signal, thereby can control indoor communication module 5 and outdoor communication module 6 and communicate when the input signal of telecommunication is great, control indoor communication module 5 and the communication of outdoor communication module 6 pause when the input signal of telecommunication is less, therefore, can effectively avoid the voltage loss on the online, promote the reliability of communication.
In some embodiments, as shown in fig. 1 or 2, the indoor circuit board 1 is provided with a first neutral connection N1 and a first live connection L1. As shown in fig. 2, the zero-crossing point detection module 7 includes a first current limiting unit 71 and an isolation unit 72. Wherein, the first end of the first current limiting unit 71 is connected with the first live wire connection end N1; the first end of the isolation unit 72 is connected with the second end of the first current limiting unit 71, the second end of the isolation unit 72 is connected with the first zero line connecting end N1, the third end of the isolation unit 72 is connected with a preset power source VC, the fourth end of the isolation unit 72 is grounded, and the output end of the isolation unit 72 is connected with the main control module 8 to output a zero crossing point detection signal.
Specifically, in order to effectively identify the interval from VAB1 to VAB2 to avoid communication in this interval of the communication loop, the zero-crossing detection module 7 constructed above is used to identify the zero-crossing point of the input electrical signal, when it is identified that the live wire voltage input to the first live wire connection end L1 is higher than the first zero line connection end N1 half cycle according to the zero-crossing point, the operating current IAC flows from the live wire to the zero line, and at this time, the effective voltage value at both ends of the communication loop is exactly the interval from VAB1 to VAB2, in this case, the current in the zero-crossing detection module 7 flows from the first live wire connection end L1 to the first zero line connection end N1 through the isolation unit 72, and the isolation unit 72 is turned on and outputs V0 to be a low level, so that the main control module 8 controls the indoor communication module 5 and the outdoor communication module 6 to suspend communication; on the contrary, when it is recognized according to the zero crossing point that the live wire voltage input by the first live wire connection end L1 is lower than the first zero wire connection end N1 half cycle, the operating current IAC flows from the zero wire to the live wire, and at this time, the effective voltage value at both ends of the communication loop is just in the interval from VAB2 to VAB3, in this case, the current in the zero crossing point detection module 7 flows from the first zero wire connection end N1 to the first live wire connection end L1 through the isolation unit 72, and the isolation unit 72 is turned off and outputs V0 as a high level, so that the main control module 8 can control the indoor communication module 5 and the outdoor communication module 6 to communicate with each other. Therefore, voltage loss on the online line is effectively avoided, and the reliability of communication is improved.
In some embodiments, as shown in fig. 2, the isolation unit 72 includes a first diode D1, a first optocoupler B1, and a first resistor R1. An anode of the first diode D1 is connected to the first neutral connection terminal N1, and a cathode of the first diode D1 is connected to the second terminal of the first current limiting unit 71; a first end of the first optical coupler B1 is connected with a second end of the first current limiting unit 71, a second end of the first optical coupler B1 is connected with a first zero line connecting end N1, and a fourth end of the first optical coupler B1 is grounded; a first end of the first resistor R1 is connected with a preset power supply VC, and a second end of the first resistor R1 is connected with a third end of the first optocoupler B1; and an output end of the isolation unit 72 is arranged between the third end of the first optocoupler B1 and the second end of the first resistor R1.
Specifically, when the live wire voltage input by the first live wire connection end L1 is higher than the first zero wire connection end N1 half cycle, the first optocoupler B1 is turned on, the isolation end output voltage V0 is at a low level, and the main control module 8 controls the indoor communication module 5 and the outdoor communication module 6 to suspend communication; when the live wire voltage input by the first live wire connecting end L1 is lower than the first zero wire connecting end N1 half cycle, the first optocoupler B1 is cut off, the isolation end output voltage V0 is at a high level, and the main control module 8 can control the indoor communication module 5 to communicate with the outdoor communication module 6.
In some embodiments, the indoor circuit board 1 is provided with a first neutral connection N1 and a first live connection L1, and as shown in fig. 1, the power module 4 includes a voltage dividing unit 41, a rectifying unit 42 and a voltage stabilizing unit 43. Wherein, the first end of the voltage dividing unit 41 is connected to the first live wire connection end L1; a first end of the rectifying unit 42 is connected with a second end of the voltage dividing unit 41; the first end of the voltage stabilizing unit 43 is connected with the second end of the rectifying unit 42, the second end of the voltage stabilizing unit 43 is connected with the indoor communication module 5, and the third end of the voltage stabilizing unit 43 is connected with the first zero line connecting end N1.
Specifically, the voltage input by the first live wire connection terminal L1 is stepped down by the voltage dividing unit 41, and is rectified by the rectifying unit 42 and stabilized by the voltage stabilizing unit 43 to form a stabilized power supply VAN, which is designed to be used as a working power supply for the indoor communication module 5 and the outdoor communication module 6 to supply power for communication in the communication loop.
In an embodiment, the rectifying unit 42 may include a diode to implement unidirectional half-wave rectification.
In some embodiments, as shown in fig. 1, the regulator unit 42 includes a zener diode D2 and a capacitor C1. Wherein, a first end of the zener diode D2 is connected with a second end of the rectifying unit 42; a first end of the capacitor C1 is connected with a first end of the zener diode D2 and the indoor communication module 5, and a second end of the capacitor C1 is connected with the first neutral connection terminal N1.
In some embodiments, the indoor circuit board 1 is provided with a first signal connection a1, and the outdoor circuit board 2 is provided with a second signal connection a2 and a second neutral connection N2.
And, as shown in fig. 1, the indoor communication module 5 includes a second current limiting unit 51 and a first communication unit 52. Wherein, a first end of the second current limiting unit 51 is connected with a first end of the capacitor C1; the first end of the first communication unit 52 is connected to the second end of the second current limiting unit 51, the second end of the first communication unit 52 is connected to the first signal connection end a1, and the control end of the first communication unit 52 is connected to the main control module 8.
And, as shown in fig. 1, the outdoor communication module 6 includes a third current limiting unit 61 and a second communication unit 62. The first end of the third current limiting unit 61 is connected to the second signal connection end a 2; a first end of the second communication unit 62 is connected to a second end of the third current limiting unit 61, a second end of the second communication unit 62 is connected to the second neutral connection terminal N2, and a control end of the second communication unit 62 is connected to the main control module 8. Therefore, through the design of the indoor communication module 5 and the outdoor communication module 6, the power module 4, the indoor communication module 5 and the outdoor communication module 6 can form a communication loop based on the connection of the on-line wire 3, and the communication between the indoor unit and the outdoor unit is realized.
In some embodiments, as shown in fig. 1, the first communication unit 52 includes a second optical coupler B2 and a third optical coupler B3. A first end of the second optocoupler B2 is connected with a second end of the second current limiting unit 51, and a control end of the second optocoupler B2 is connected with the main control module 8 and is used for receiving a first communication signal sent by the outdoor communication module 6; the first end of the third optical coupler B3 is connected with the second end of the second optical coupler B2, the control end of the third optical coupler B3 is connected with the main control module 8, and the second end of the third optical coupler B3 is connected with the first signal connection end A1 and used for sending a second communication signal to the outdoor communication module 6.
In some embodiments, as shown in fig. 1, the second communication unit 62 includes a fourth optical coupler B4 and a fifth optical coupler B5. A first end of the fourth optocoupler B4 is connected with a second end of the third current limiting unit 61, and a control end of the fourth optocoupler B4 is connected with the main control module 8 and is used for receiving a second communication signal; the first end of the fifth optical coupler B5 is connected with the second end of the fourth optical coupler B4, the second end of the fifth optical coupler B5 is connected with the second zero line connecting end N2, and the control end of the fifth optical coupler B5 is connected with the main control module 8 and used for sending a first communication signal.
In some embodiments, as shown in fig. 1, the online line 3 includes a live line connection line 31, a neutral line connection line 32 and a signal connection line 33, a second live line connection end L2 is disposed on the indoor circuit board 1, a third live line connection end L3 is disposed on the outdoor circuit board 2, the first neutral line connection end N1 is connected to the second neutral line connection end N2 through the neutral line connection line 32, the second live line connection end L2 is connected to the third live line connection end L3 through the live line connection line 31, and the first signal connection end a1 is connected to the second signal connection end a2 through the signal connection line 33.
Specifically, as shown in fig. 1, the indoor circuit board 1 and the outdoor circuit board 2 are connected by the live wire connection line 31 and the zero wire connection line 32 to form a power loop of the communication circuit 10 of the indoor and outdoor units, which is used for providing power for the outdoor circuit board 2, and the indoor circuit board 1 and the outdoor circuit board 2 are closed by the zero wire connection line 32 and the signal connection line 33 to form a communication loop of the communication circuit 10 of the indoor and outdoor units, which is about to use the zero wire as a reference point, so that the zero wire is a multiplexing of the power loop and the communication loop, and the circuit design is simplified.
The following describes the communication circuit 10 for indoor and outdoor units according to the present invention with reference to specific embodiments.
For example, the power module 4 is a 24V regulated power supply, that is, the input voltage VAN of the formed communication loop is 24V, the sum of the second current limiting unit 51 and the third current limiting unit 61 of the communication loop is 8K ohms, and the voltage drop of 4 optical couplers in the first communication unit 52 and the second communication unit 62 in the communication loop is 4V. When the IAC is 0, the communication current of the communication loop is 2.5 mA; when the length of the online line 3 is 60 meters, the equivalent resistance R0 of the zero line connecting line 32 of the online line 3 is 0.5 ohm, the equivalent resistance Rs of the signal connecting line is 0.5 ohm, and the equivalent resistance Rs can be ignored because 0.5 ohm is far less than 8K ohm; when the IAC is 20A, VBN is 10V, VAB-VBN is 24-10V, and 14V, the communication current of the communication loop is (14V-4V)/8 is 1.25mA, the current is too small, and the optocoupler of the communication unit cannot normally work; when the IAC is-20A, VBN is-10V, VAB-VBN-24 +10 is 34V, and at this time, the communication current of the communication loop is (34V-4V)/8 is 3.75mA, the current is increased, and the optocoupler of the communication unit normally operates; therefore, the zero-crossing point detection module 7 identifies the above two cases, when the V0 output is at a low level, the main control module 8 controls the indoor communication module 5 and the outdoor communication module 6 not to communicate when the communication current is decreased, and when the V0 output is at a high level, the main control module 8 can control the indoor communication module 5 and the outdoor communication module 6 to communicate when the communication current is increased.
The second embodiment of the present invention provides an air conditioner, as shown in fig. 8, the air conditioner 100 includes an indoor unit 20, an outdoor unit 30 and the communication circuit 10 of the indoor and outdoor units provided in the above embodiments.
Among them, the indoor unit 20 communicates with the outdoor unit 30 based on the indoor-outdoor unit communication circuit 10.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
An air conditioner according to some embodiments of the present application includes an air conditioner indoor unit installed in an indoor space. The indoor unit, i.e., the indoor unit, is connected to an outdoor unit, i.e., the outdoor unit, installed in an outdoor space through a pipe. The outdoor unit of the air conditioner may be provided with a compressor, an outdoor heat exchanger, an outdoor fan, an expander, and the like for a refrigeration cycle, and the indoor unit of the air conditioner may be provided with an indoor heat exchanger and an indoor fan.
According to the utility model discloses an air conditioner 100, provide other interior outer machine communication circuit 10 through adopting above-mentioned embodiment and realize the communication between indoor set 20 and the off-premises station 30, can effectively avoid the voltage loss on the online, promote the reliability of communication.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An indoor and outdoor unit communication circuit, comprising:
an indoor circuit board, an outdoor circuit board and an on-line;
the power supply module is arranged on the indoor circuit board;
the indoor communication module is arranged on the indoor circuit board and is connected with the power supply module;
an outdoor communication module disposed on the outdoor circuit board;
the indoor circuit board is connected with the outdoor circuit board through the on-line wire so that the power supply module, the outdoor communication module and the indoor communication module form a communication loop;
the zero crossing point detection module is arranged on the indoor circuit board and used for detecting the zero crossing point of the input electric signal of the power supply module and generating a zero crossing point detection signal;
the main control module is connected with the indoor communication module, the outdoor communication module and the zero crossing point detection module and used for controlling the communication state of the indoor communication module and the outdoor communication module according to the zero crossing point detection signal.
2. The indoor and outdoor unit communication circuit according to claim 1,
the indoor circuit board is provided with a first zero line connecting end and a first live wire connecting end;
the zero-crossing point detection module includes:
the first end of the first current limiting unit is connected with the first live wire connecting end;
the first end of the isolation unit is connected with the second end of the first current limiting unit, the second end of the isolation unit is connected with the first zero line connecting end, the third end of the isolation unit is connected with a preset power supply, the fourth end of the isolation unit is grounded, and the output end of the isolation unit is connected with the main control module to output the zero crossing point detection signal.
3. The indoor and outdoor unit communication circuit according to claim 2, wherein the isolating unit comprises:
the anode of the first diode is connected with the first zero line connecting end, and the cathode of the first diode is connected with the second end of the first current limiting unit;
a first end of the first optical coupler is connected with a second end of the first current limiting unit, a second end of the first optical coupler is connected with the first zero line connecting end, and a fourth end of the first optical coupler is grounded;
a first end of the first resistor is connected with the preset power supply, and a second end of the first resistor is connected with a third end of the first optocoupler;
and an output end of the isolation unit is arranged between the third end of the first optocoupler and the second end of the first resistor.
4. The indoor and outdoor unit communication circuit according to claim 1, wherein the indoor circuit board has a first neutral connection terminal and a first live connection terminal disposed thereon, and the power module comprises:
the first end of the voltage division unit is connected with the first live wire connecting end;
the first end of the rectifying unit is connected with the second end of the voltage dividing unit;
and the first end of the voltage stabilizing unit is connected with the second end of the rectifying unit, the second end of the voltage stabilizing unit is connected with the indoor communication module, and the third end of the voltage stabilizing unit is connected with the first zero line connecting end.
5. The indoor and outdoor unit communication circuit according to claim 4, wherein the voltage regulator unit comprises:
a first end of the voltage stabilizing diode is connected with a second end of the rectifying unit;
and the first end of the capacitor is connected with the first end of the voltage stabilizing diode and the indoor communication module, and the second end of the capacitor is connected with the first zero line connecting end.
6. The indoor and outdoor unit communication circuit according to claim 5,
the indoor circuit board is provided with a first signal connecting end, and the outdoor circuit board is provided with a second signal connecting end and a second zero line connecting end;
the indoor communication module includes:
a first end of the second current limiting unit is connected with a first end of the capacitor;
a first end of the first communication unit is connected with a second end of the second current limiting unit, a second end of the first communication unit is connected with the first signal connecting end, and a control end of the first communication unit is connected with the main control module;
the outdoor communication module includes:
a first end of the second current limiting unit is connected with the second signal connecting end;
and the first end of the second communication unit is connected with the second end of the third current limiting unit, the second end of the second communication unit is connected with the second zero line connecting end, and the control end of the second communication unit is connected with the main control module.
7. The indoor and outdoor unit communication circuit according to claim 6, wherein the first communication unit comprises:
a first end of the second optical coupler is connected with a second end of the second current limiting unit, and a control end of the second optical coupler is connected with the main control module and used for receiving a first communication signal sent by the outdoor communication module;
the first end of the third optical coupler is connected with the second end of the second optical coupler, the control end of the third optical coupler is connected with the main control module, and the second end of the third optical coupler is connected with the first signal connecting end and used for sending a second communication signal to the outdoor communication module.
8. The indoor and outdoor unit communication circuit according to claim 6, wherein the second communication unit comprises:
a first end of the fourth optical coupler is connected with a second end of the third current limiting unit, and a control end of the fourth optical coupler is connected with the main control module and used for receiving the second communication signal;
the first end of the fifth optical coupler is connected with the second end of the fourth optical coupler, the second end of the fifth optical coupler is connected with the second zero line connecting end, and the control end of the fifth optical coupler is connected with the master control module and used for sending the first communication signal.
9. The indoor and outdoor unit communication circuit according to any one of claims 6 to 8, wherein the on-line cable comprises a live wire connection cable, a neutral wire connection cable and a signal connection cable, the indoor circuit board is provided with a second live wire connection end, the outdoor circuit board is provided with a third live wire connection end, the first neutral wire connection end is connected to the second neutral wire connection end through the neutral wire connection cable, the second live wire connection end is connected to the third live wire connection end through the live wire connection cable, and the first signal connection end is connected to the second signal connection end through the signal connection cable.
10. An air conditioner, comprising:
an indoor unit and an outdoor unit;
the indoor and outdoor unit communication circuit of any one of claims 1 to 9, wherein the indoor unit communicates with the outdoor unit based on the indoor and outdoor unit communication circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122721159.0U CN216432047U (en) | 2021-11-08 | 2021-11-08 | Indoor and outdoor unit communication circuit and air conditioner |
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| CN202122721159.0U CN216432047U (en) | 2021-11-08 | 2021-11-08 | Indoor and outdoor unit communication circuit and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076938A (en) * | 2022-06-23 | 2022-09-20 | 海信（广东）空调有限公司 | Indoor and outdoor unit communication circuit, air conditioner and communication control method of air conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076938A (en) * | 2022-06-23 | 2022-09-20 | 海信（广东）空调有限公司 | Indoor and outdoor unit communication circuit, air conditioner and communication control method of air conditioner |
| CN115076938B (en) * | 2022-06-23 | 2023-10-27 | 海信（广东）空调有限公司 | Indoor and outdoor unit communication circuit, air conditioner and communication control method of air conditioner |
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