CN217486374U

CN217486374U - Communication power supply circuit and multi-split air conditioning equipment

Info

Publication number: CN217486374U
Application number: CN202221364705.8U
Authority: CN
Inventors: 孙良伟; 梅利军; 陈家朗; 王晨; 吴田; 陈续朗
Original assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Current assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-09-23
Anticipated expiration: 2032-06-02

Abstract

The utility model provides a communication supply circuit and many online air conditioning equipment. The communication power supply circuit is used for air conditioning equipment, and air conditioning equipment includes indoor set and off-premises station, and the communication power supply circuit includes: a communication bus comprising a positive bus; the voltage module is arranged on the outdoor unit, is connected with the communication bus and is used for generating a voltage signal, and the voltage signal can transmit a communication signal and supply power; and the current module is arranged on the indoor unit, is connected with the communication bus, and is used for adjusting the voltage signal and transmitting a current signal upwards, wherein the current signal can transmit a communication signal. The embodiment of the utility model discloses a communication bus transmission communication signal and power supply signal through air conditioning equipment have practiced thrift the cable cost, have reduced the degree of difficulty of installation wiring, and can fall the electricity back very first time at the indoor set and close electronic expansion valve, make the indoor set refrigerant pipeline that falls the electricity end to avoid the emergence of phenomena such as compressor liquid attack, condensation drip, improve air conditioning equipment's reliability.

Description

Communication power supply circuit and multi-split air conditioning equipment

Technical Field

The utility model relates to an air conditioner power supply technical field particularly, relates to a communication supply circuit and multi-split air conditioning equipment.

Background

In the related art, an indoor unit and an outdoor unit of an air conditioning device need to be connected through a power supply line and a communication line, wherein the power supply line is divided into a strong current line and a weak current line, when the power supply line is out of power, the strong current line and the weak current line are both powered off, components such as an electronic expansion valve powered by weak current cannot be closed, a refrigerant pipeline is in an open state, and a compressor is possibly damaged.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

Therefore, the utility model discloses a first aspect provides a communication supply circuit.

The second aspect of the utility model provides a many online air conditioning equipment.

In view of this, the utility model provides a first aspect provides a communication supply circuit for air conditioning equipment, air conditioning equipment includes indoor set and off-premises station, and communication supply circuit includes: a communication bus comprising a positive bus; the voltage module is arranged on the outdoor unit, is connected with the communication bus and is used for generating a voltage signal, and the voltage signal can transmit a communication signal and supply power; and the current module is arranged on the indoor unit, is connected with the communication bus, and is used for adjusting the voltage signal and transmitting a current signal upwards, wherein the current signal can transmit a communication signal.

In this technical scheme, the utility model provides an utilize communication bus as the light current power supply to a technical scheme who provides 24V voltage signal supplies power through communication bus for the control panel of indoor set, electronic expansion valve's part promptly, thereby has saved the light current circuit, has reduced the wire rod cost. Meanwhile, when the power failure occurs accidentally, the power supply signal and the control signal which are provided by the communication bus can be used for controlling the parts such as the throttle valve and the like to be closed emergently, so that the problems of condensation, water dripping, compressor liquid impact and the like are avoided, and the stability of the system is improved.

Specifically, the communication bus carries a power supply signal, and therefore includes a positive bus and a negative bus, and it can be understood that the connection modes of the positive bus and the negative bus can be reversed. The voltage module is specifically a voltage modulation module, and the voltage modulation module can be arranged on an outdoor unit of the central air conditioner.

The current module is specifically a high-frequency pulse current module, and the high-frequency pulse current module can be arranged on functional modules of an indoor unit, heating equipment, refrigerant switching equipment, line control equipment and the like of the central air conditioner. The voltage module modulates communication signals among various parts of the air conditioning equipment into readable wide voltage signals, namely the voltage signals. The current module divides the voltage signal into two parts, one part is used for supplying power, and the other part is restored into a communication line signal after demodulation, so that communication among all parts of the air conditioning equipment is realized.

The embodiment of the utility model discloses a communication bus through air conditioning equipment transmits communication signal and power supply signal between each functional unit of air conditioning equipment to save the weak current power supply cable in the power supply bundle, practiced thrift the cable cost. Meanwhile, because the communication bus can simultaneously transmit signals and energy, a plurality of indoor units of the air conditioning equipment are directly connected to the communication bus, and the indoor units do not need to be sequentially connected in a hand-in-hand manner, so that when the air conditioning equipment has the requirement of a newly-added indoor unit, only the commercial power connection and the communication connection of the indoor unit are needed to be completed, the communication between the newly-added indoor unit and the air conditioning system can be realized, a communication line and a weak current cable do not need to be connected at the tail end of the installed air conditioning system, and the difficulty in installing and wiring is reduced.

Additionally, the utility model provides a communication supply circuit among the above-mentioned technical scheme can also have following additional technical characterstic:

in the above technical solution, the voltage module includes: the first communication chip is connected with the communication bus; and the source electrode of the switch tube is used for receiving a power supply signal, the grid electrode of the switch tube is connected with the first communication chip, and the drain electrode of the switch tube is connected with the positive bus.

In the technical scheme, the voltage modulation module specifically comprises a first communication chip and a switch tube.

The first communication chip may be, for example, an MDV-Link chip, a pin of the first communication chip is connected to a gate of a switching tube, the switching tube may be an MOS (Metal-Oxide-Semiconductor Field-Effect transistor), a source and a drain of the switching tube are respectively connected to a power supply signal and a positive bus in a communication bus, and the first communication chip modulates and forms a communication signal between components of the air conditioning equipment into a readable wide voltage signal, that is, the voltage signal, by controlling an on-off state of the switching tube.

In some embodiments, the supply signal is a 24V supply signal.

When other parts of the air conditioning equipment, such as a control module of the indoor unit, receive the wide voltage signal, a part of the wide voltage signal is rectified and regulated by a power supply module of the control module to form power supply signals of 24V, 18V, 12V and 3.3V, so that power is supplied to each module of the indoor unit.

The other part of the wide voltage signal is received by a demodulation chip in the indoor unit control module, demodulated and restored into a corresponding communication signal, data signal transmission among the modules and the components is realized according to the communication signal, and the normal communication function among the components in the air conditioning system is ensured.

The embodiment of the utility model provides a communication bus through air conditioning equipment transmits communication signal and power supply signal between each functional unit of air conditioning equipment to save the weak current power supply cable in the power supply wiring, practiced thrift the cable cost. Meanwhile, because the communication bus can simultaneously transmit signals and energy, a plurality of indoor units of the air conditioning equipment are directly connected to the communication bus, and the indoor units do not need to be sequentially connected in a hand-in-hand manner, so that when the air conditioning equipment has the requirement of a newly-added indoor unit, only the commercial power connection and the communication connection of the indoor unit are needed to be completed, the communication between the newly-added indoor unit and the air conditioning system can be realized, a communication line and a weak current cable do not need to be connected at the tail end of the installed air conditioning system, and the difficulty in installing and wiring is reduced.

Meanwhile, as the weak current power supply is integrated on the communication bus, a weak current cable is not required to be arranged, the indoor unit can be connected with a mains supply nearby, and a strong current cable parallel to the communication bus is not required to be arranged, so that the signal interference of the strong current cable on the communication cable is avoided, the communication cable does not require a high-cost shielding twisted pair, and the cable cost is further reduced.

When the power failure of the indoor unit occurs, the main control board, the electronic expansion valve and other components can still get electricity through the communication bus, so that the electronic expansion valve can be closed at the first time after the power failure of the indoor unit, the refrigerant pipeline of the power-failure indoor unit is cut off, the phenomena of liquid impact, condensation, water dripping and the like of the compressor are avoided, and the reliability of the air conditioning equipment is improved.

In any of the above technical solutions, the current module includes: the second communication chip is connected with the communication bus and used for determining a communication signal according to the voltage signal; and the power supply circuit is connected with the communication bus and used for generating a second power supply signal according to the voltage signal.

In the technical scheme, the current module is specifically a high-frequency pulse current module, the high-frequency pulse current module can be arranged on functional modules of an indoor unit, heating equipment, refrigerant switching equipment, line control equipment and the like of the central air conditioner, and the high-frequency pulse current module specifically comprises a second communication chip and a power supply circuit.

Wherein, the second communication chip can also be a chip such as MDV-Link.

Specifically, under the modulation of the first communication chip, the communication signal is modulated into a readable wide voltage signal, i.e., the above-described voltage signal, and is transmitted on the communication bus. The current module is connected to the communication bus to obtain a wide voltage signal transmitted over the communication bus.

After the wide voltage signal is received by the current module, a part of the wide voltage signal is received by the power supply circuit, and is rectified by the rectifying part and the voltage regulating part of the power supply circuit to obtain a direct current power supply signal with stable voltage according with the power supply requirements of each module, such as power supply signals of 24V DC, 18V DC, 12V DC and 3.3V DC, so as to supply power to components such as a line Controller, a relay, an electronic expansion valve, a display panel, a processor (MCU, Micro Controller Unit), a temperature sensor, a water level sensor and the like.

The other part of the wide voltage signal is received by the second communication chip, and is demodulated and restored into a corresponding communication signal under the regulation of the second communication chip, so that the wide voltage signal is received by components such as a wire Controller, a relay, an electronic expansion valve, a display panel, a processor (MCU), a temperature sensor, a water level sensor and the like, the data signal transmission among the modules and the components is realized, and the normal communication function among the components in the air-conditioning system is ensured.

Meanwhile, the second communication chip can also modulate communication signals sent by components such as a line controller, a relay, an electronic expansion valve, a display panel, a processor, a temperature sensor, a water level sensor and the like to generate high-frequency pulse current signals, the high-frequency pulse current signals are also transmitted on the communication bus and can be received by other equipment, and the other equipment on the communication bus can demodulate the current signals to obtain corresponding communication signals, so that signal communication among modules is realized.

It can be understood that the high-frequency pulse current signal (also called current signal) is only used as a communication signal and is not used for power supply.

The embodiment of the utility model discloses a communication bus through air conditioning equipment, transmit communication signal and power supply signal between each functional unit of air conditioning equipment, the cable cost has been practiced thrift, the degree of difficulty of installation wiring has been reduced, and when the indoor set falls the electricity appearing, the main control board, subassembly such as electronic expansion valve still can get the electricity through communication bus, consequently can fall the electricity back very first time at the indoor set and close electronic expansion valve, make the indoor set refrigerant pipeline that falls the electricity end, thereby avoid compressor liquid impact, the emergence of phenomenons such as condensation drips, improve air conditioning equipment's reliability.

In any of the above technical solutions, the voltage module further includes: and the input end of the driving module is connected with the first communication chip, and the output end of the driving module is connected with the switch tube.

In the technical scheme, the first communication chip may be, for example, an MDV-Link chip, and a pin of the first communication chip is connected to a gate of a switching tube, where the switching tube may be an MOS tube, and the driving module is a driving circuit of the MOS tube.

Specifically, the driving circuit includes a transistor Q1, a transistor Q2, and a transistor Q3, wherein a base of the transistor Q1 is connected to a pin of the first communication line chip, an emitter of the transistor Q1 is grounded through a resistor R2, a collector of the transistor Q1 is connected to a base of the transistor Q2 and a base of the transistor Q3, an emitter of the transistor Q3 is connected to an emitter of the transistor Q2, a collector of the transistor Q3 is grounded, and a collector of the transistor Q2 is connected to a source of the switching tube through a resistor.

The driving circuit further comprises a resistor R20, one end of the resistor R20 is connected with the grid electrode of the switching tube, the other end of the resistor R20 is connected with the resistor R3 and the capacitor C1, the resistor R3 and the capacitor C1 are connected in parallel, and the other ends of the resistor R3 and the capacitor C1 are connected with the emitter of the transistor Q3 and the emitter of the transistor Q2.

The first communication chip controls the on-off state of the switch tube through the driving module, and modulates and forms communication signals among all parts of the air conditioning equipment into readable wide voltage signals, namely the voltage signals, so that the communication signals and power supply signals are transmitted among all functional parts of the air conditioning equipment through a communication bus of the air conditioning equipment, the cost of cables is saved, the difficulty of installing and wiring is reduced, and the reliability of the air conditioning equipment is improved.

In any of the above technical solutions, the voltage module further includes: and the sampling end of the sampling module is connected with the positive bus, and the output end of the sampling module is connected with the first communication chip.

In this technical scheme, the voltage module still includes the sampling module, and this sampling module includes sampling end and output, and wherein, the sampling end is connected to on the positive bus of communication bus for obtain the signal of telecommunication on the positive bus, including above-mentioned wide voltage signal, and pass through this voltage signal of output to first communication chip transmission.

The first communication chip can determine whether the modulated voltage signal is normal or not through the sampling signal of the voltage signal acquired by the sampling module, wherein the modulated voltage signal comprises whether the communication signal is normal or not, whether the voltage is normal or not and the like, so that the control on the driving module and the switching tube is adjusted, the correctness of the voltage signal on the communication bus is ensured, and closed-loop control is formed.

In any of the above technical solutions, the voltage module further includes: and the intermediate level circuit is connected with the sampling module and the first communication chip.

In the technical scheme, the voltage module further comprises an intermediate level circuit, one end of the intermediate level circuit is connected with the sampling module, and the other end of the intermediate level circuit is connected with the first communication chip, so that an intermediate level signal required by work is provided for the first communication line chip.

Specifically, the intermediate-level circuit includes a chip IC2, and the Vin pin of the chip IC2 is connected to the 12V reference electrical signal and grounded through a capacitor C23. Vout pins of the IC2 are all connected in series and connected to a positive bus, and an inductor L1, a resistor R17, a diode D1 and a resistor R7 are also connected in series between the positive bus and the Vout pins.

An ADJ pin of the chip IC2 is connected to a collector of a transistor Q4, an emitter of the transistor Q4 is grounded, and a base of the transistor Q4 is connected to a CONM pin of the first communication chip through a resistor R4.

In any of the above technical solutions, the voltage module further includes: the first protection circuit is connected with the first communication chip and comprises: the first end of the first capacitor is connected with the first communication chip, and the second end of the first capacitor is grounded; the first resistor is connected in parallel with the first capacitor.

In this technical solution, a first protection circuit is disposed in the voltage module, and specifically, the first protection circuit is a short-circuit protection circuit, and the first protection circuit includes a first capacitor and a first resistor, where a first end of the first capacitor is connected to the diode D1 through the resistor R13 and is connected to the first communication chip, and a second end of the first capacitor is connected to the ground point.

The first resistor is connected in parallel with the first capacitor, specifically, a first end of the first resistor is connected with a first end of the first capacitor, and a second end of the first resistor is grounded.

Through setting up first protection circuit, can protect first chip when short-circuit fault appears, the protection voltage module avoids appearing the device damage because of the short circuit, improves communication circuit's reliability.

In any of the above technical solutions, the communication bus further includes a negative bus, and the voltage module further includes: a charge-discharge circuit connected to a communication bus, comprising: the emitting electrode of the first triode is connected with the positive bus; the first end of the second resistor is connected with the base electrode of the first triode; the first end of the third resistor is connected with the positive bus, and the second end of the third resistor is connected with the second end of the second resistor; and the emitting electrode of the second triode is connected with the second end of the third resistor, the base electrode of the second triode is connected with the collector electrode of the first triode, and the collector electrode of the second triode is grounded.

In the technical scheme, the communication bus carries power supply signals, so that the communication bus comprises a positive bus and a negative bus, and the connection modes of the positive bus and the negative bus can be exchanged. Because the wide voltage signal of transmission on the communication bus, therefore each part on the voltage module can be in charged state if on the condenser, and the signal of telecommunication on communication bus disappears, if when the system shut down, can lead to the electric potential in the voltage module to be higher than communication bus, for avoiding the reverse release of the signal of telecommunication, the utility model discloses set up charge release circuit, can release the electric charge in the voltage module when communication bus outage to guarantee communication line's safety, improve communication circuit's reliability.

Specifically, the charge discharging circuit includes a first transistor, a second resistor, and a third resistor. The emitting electrode of the first triode is connected to the positive bus, the collecting electrode of the first triode is connected with the base electrode of the second triode, and the base electrode of the first triode is connected to the positive bus through the second resistor and the third resistor. One end of the second resistor is connected to the base electrode of the first triode, the other end of the second resistor is connected to one end of the third resistor, and the other end of the third resistor is connected to the positive bus.

The collector of the second triode is grounded, and the emitter of the second triode is connected to the common end of the second resistor and the third resistor.

In any of the above technical solutions, the current module further includes: a flip circuit, comprising: an input bus connected with the communication bus; and the polarity of the output bus is opposite to that of the communication bus.

In the technical scheme, the communication bus carries power supply signals, so that the communication bus comprises a positive bus and a negative bus, and the connection modes of the positive bus and the negative bus can be exchanged in order to improve the compatibility of the system.

Specifically, the current module is provided with two turning circuits, one end of each turning circuit 1 is connected with the positive bus, and the other end of each turning circuit 2 is connected with the negative bus. One end of the turning circuit 2 is connected with the negative bus, and the other end of the turning circuit 2 is connected with the positive bus.

The flip circuit comprises a chip IC1, the flip circuit 1 comprises a diode ZD2, one end of the diode ZD2 is connected with a positive bus, the other end of the diode ZD2 is connected with a G1 pin of the chip IC1 through a resistor R219, an S1 pin of the chip IC1 is grounded, and a D1 pin of the chip IC1 is connected with a negative bus.

The flip-flop circuit 2 includes a diode ZD3, one end of the diode ZD3 is connected to the negative bus, the other end of the diode ZD3 is connected to the G2 pin of the chip IC2 through a resistor R216, the S2 pin of the chip IC1 is grounded, and the D2 pin of the chip IC1 is connected to the positive bus.

In any of the above technical solutions, the current module further includes: a second protection circuit connected to the communication bus, comprising: the first end of the first transient diode is connected with the positive bus, and the second end of the first transient diode is grounded; and the first end of the second transient diode is connected with the negative bus, and the second end of the first transient diode is grounded.

In the technical scheme, the current module further includes a second protection circuit, wherein the second protection circuit is specifically a TVS (Transient Voltage super) protection circuit.

Specifically, the second protection circuit includes a first transient diode connected in series between the positive bus and the ground line and a second transient diode connected in series between the negative bus and the ground line. The transient diode is a high-efficiency protection device, when two poles of the transient diode receive reverse transient high-energy impact, the high impedance between the two poles can be changed into low impedance at a high speed, so that surge power is absorbed, components in a circuit are effectively protected from being influenced by surge current, damage caused by surge pulse is avoided, and the reliability of a communication power supply circuit is improved.

The utility model discloses the second aspect provides a many online air conditioning equipment, and this many online air conditioning equipment includes the communication supply circuit who provides as above-mentioned in arbitrary technical scheme, consequently, should include simultaneously many online air conditioning equipment like above-mentioned all beneficial effects of the communication supply circuit who provides in arbitrary technical scheme, for avoiding the repetition, no longer gives unnecessary details here.

In the above technical solution, the multi-split air conditioning apparatus further includes: an outdoor unit; and the indoor unit is connected with the outdoor unit through a communication bus.

In the technical scheme, the multi-split air conditioning equipment can be a central air conditioning system, and comprises an outdoor unit and at least one indoor unit, wherein the outdoor unit and the indoor unit are connected through a communication bus.

The embodiment of the utility model discloses a communication bus through air conditioning equipment transmits communication signal and power supply signal between off-premises station and indoor set to save the weak current power supply cable in the power supply line bundle, practiced thrift the cable cost. Meanwhile, because the communication bus can simultaneously carry out signal transmission and energy transmission, a plurality of indoor units of the air conditioning equipment are directly connected to the communication bus, and the indoor units do not need to be sequentially connected in series in a hand-in-hand mode, so that when the air conditioning equipment has the requirement of a newly-added indoor unit, only the commercial power connection and the communication connection of the indoor unit are needed to be completed, the communication between the newly-added indoor unit and the air conditioning system can be realized, a communication line and a weak power cable do not need to be connected at the tail end of the installed air conditioning system, and the difficulty in installing and wiring is reduced.

Meanwhile, as the weak current power supply is integrated on the communication bus, no weak current cable is required to be arranged, the indoor unit can be connected with the mains supply nearby, and no strong current cable parallel to the communication bus is required to be arranged, so that the signal interference of the strong current cable on the communication cable is avoided, the communication cable does not require a high-cost shielding twisted pair, and the cable cost is further reduced.

When the indoor unit is in power failure, the main control board, the electronic expansion valve and other components can still get electricity through the communication bus, so that the electronic expansion valve can be closed at the first time after the indoor unit is in power failure, the refrigerant pipeline of the power-failure indoor unit is cut off, the phenomena of liquid impact, condensation and water dripping of a compressor and the like are avoided, and the reliability of air conditioning equipment is improved.

In any of the above technical solutions, the communication power supply circuit includes a current module, and each indoor unit is provided with a current module; the voltage module is arranged in the outdoor unit.

In the technical scheme, the outdoor unit serves as a host and comprises a voltage module, namely a voltage modulation module. The indoor unit is used as a slave machine and comprises a current module, namely a high-frequency pulse current module. The outdoor unit sends a voltage signal to the indoor unit, and a weak current load of the indoor unit gets electricity through the voltage signal and acquires a communication signal through demodulating the voltage signal.

And when the indoor units send communication signals to the outdoor unit, the communication signals are carried through the pulse current signals.

In any one of the above technical solutions, the multi-split air conditioning equipment further includes: the refrigerant switching device comprises a current module and is connected with the outdoor unit; the hot water device comprises a current module which is connected with the refrigerant switching device and the indoor unit.

In the technical scheme, the multi-split air conditioner further comprises a refrigerant switching device and a hot water device, wherein the heat medium switching device is used for switching refrigerants in the air conditioning system, and the hot water device is used for providing hot water for floor heating and full-house hot water.

Specifically, the outdoor unit serves as a host and includes a voltage module, i.e., a voltage modulation module. The refrigerant switching device and the water heating device are both used as slave machines and comprise current modules, namely high-frequency pulse current modules. The outdoor unit sends a voltage signal to the indoor unit, the refrigerant switching device and the water heating device take electricity through the voltage signal, and a communication signal is obtained through demodulating the voltage signal.

For example, the outdoor unit of the air conditioning equipment is connected with the refrigerant switching device, the floor heating and water heating device and the indoor units are sequentially connected to form a chain type communication structure, wherein the slave units, namely the refrigerant switching device, the water heating device and the air conditioning indoor units are communicated through high-frequency pulse current signals. The host machine sends wide voltage signals to the slave machines, namely the outdoor machines, the refrigerant switching device, the hot water device and the air conditioner indoor machines, and weak current power supply and communication signal transmission are provided through the wide voltage signals.

In any of the above technical solutions, the communication power supply circuit includes a current module, and the voltage module is disposed in the indoor unit.

In the technical scheme, the indoor unit is a host, the voltage module, namely the voltage modulation module, is arranged in the indoor unit, the indoor unit generates a voltage signal through modulation of the voltage modulation module, and the voltage signal supplies power to the refrigerant switching device, the floor heating hot water device, other indoor units or the weak current load of the line control equipment.

The weak current load comprises a wire Controller, a relay, an electronic expansion valve, a display panel, a processor (MCU), a temperature sensor, a water level sensor and other components.

In any one of the above technical solutions, the multi-split air conditioning equipment further includes: and the wire controller comprises a current module and is connected with the indoor unit.

In this technical scheme, the line controller includes ordinary line controller and collection accuse ware, and the line controller is slave unit, is provided with the current module in the line controller, also is the high frequency pulse current module.

In some embodiments, the main device is an outdoor unit, a voltage module, that is, a voltage modulation module, is disposed in the outdoor unit, the outdoor unit generates a voltage signal through modulation of the voltage modulation module, sends a wide voltage signal to the line controller, the refrigerant switching device, the hot water device and the plurality of indoor units of the air conditioner through the voltage signal, and provides weak current power supply and transmits a communication signal through the wide voltage signal.

In other embodiments, the main device is an indoor unit, a voltage module, that is, a voltage modulation module, is arranged in the indoor unit, the indoor unit generates a voltage signal through modulation of the voltage modulation module, sends a wide voltage signal to the line controller, the refrigerant switching device and the hot water device through the voltage signal, and provides weak current power supply and transmits a communication signal through the wide voltage signal.

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 shows one of the schematic structural diagrams of a communication supply circuit according to an embodiment of the present invention;

fig. 2 shows a schematic structural diagram of a voltage module according to an embodiment of the invention;

fig. 3 shows a second schematic structural diagram of a communication power supply circuit according to an embodiment of the present invention;

fig. 4 shows a schematic structural diagram of a current module according to an embodiment of the invention;

fig. 5 is a block diagram illustrating a structure of a multi-split air conditioner according to the present invention;

fig. 6 illustrates one of communication diagrams of a multi-split air conditioning apparatus according to the present invention;

fig. 7 shows a second communication diagram of a multi-split air conditioning apparatus according to the present invention;

fig. 8 illustrates a third communication schematic diagram of a multi-split air conditioning apparatus according to the present invention;

fig. 9 shows a fourth communication schematic diagram of a multi-split air conditioning apparatus according to the present invention.

Reference numerals

100 communication power supply circuit, 102 communication bus, 1022 positive bus, 1024 negative bus;

the circuit comprises a voltage module 104, a 1041 first communication chip, an 1042 switching tube, a 1043 driving module, a 1044 sampling module, a 1045 intermediate level circuit, a 1046 first protection circuit, a 10462 first capacitor, an 10464 first resistor, a 1047 charge releasing circuit, a 10472 first triode, a 10474 second resistor, a 10476 third resistor and a 10478 second triode;

106 current module, 1062 second communication chip, 1064 power supply circuit, 1066 second protection circuit, 10662 first transient diode, 10664 second transient diode, 1068 flip circuit;

200 multi-split air conditioning equipment, 202 outdoor units, 204 indoor units, 206 refrigerant switching devices, 208 hot water devices and 210 line controllers.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The communication power supply circuit and the multi-split air conditioning equipment according to some embodiments of the present invention are described below with reference to fig. 1 to 9.

Example one

In some embodiments of the present invention, a communication power supply circuit is provided for an air conditioner, the air conditioner includes an indoor unit and an outdoor unit, fig. 1 shows one of the structural schematic diagrams of the communication power supply circuit according to the embodiments of the present invention, fig. 2 shows the structural schematic diagram of a voltage module according to the embodiments of the present invention, as shown in fig. 1 and fig. 2, the communication power supply circuit 100 includes:

a communication bus 102 including a positive bus 1022; the voltage module 104 is arranged in the outdoor unit, is connected with the communication bus 102, and is used for generating a voltage signal which can transmit the communication signal and supply power; and the current module 106 is arranged on the indoor unit, is connected with the communication bus 102, and is used for adjusting a voltage signal and transmitting a current signal upwards, wherein the current signal can transmit a communication signal.

In the embodiment of the utility model provides an in, the utility model provides an utilize communication bus 102 as the light current power supply to an embodiment that provides 24V voltage signal, supply power for the control panel of indoor set 204, electronic expansion valve's part through communication bus 102 promptly, thereby saved the light current circuit, reduced the wire rod cost. Meanwhile, when power failure occurs accidentally, the power supply signal and the control signal provided by the communication bus 102 can be used for controlling parts such as the throttle valve and the like to be closed emergently, so that the problems of condensation, water dripping, compressor liquid impact and the like are avoided, and the stability of the system is improved.

Specifically, the communication bus 102 carries power supply signals thereon, and thus includes a positive bus 1022 and a negative bus 1024, it being understood that the manner of wiring of the positive bus 1022 and the negative bus 1024 may be reversed. The voltage module 104 is specifically a voltage modulation module, and the voltage modulation module may be disposed on an outdoor unit 202 of the central air conditioner.

The current module 106 is specifically a high-frequency pulse current module, and the high-frequency pulse current module may be disposed on functional modules of an indoor unit, a heating device, a refrigerant switching device, a line control device, and the like of the central air conditioner. The voltage module 104 modulates communication signals between the various components of the air conditioning apparatus into readable wide voltage signals, i.e., the voltage signals described above. The current module 106 divides the voltage signal into two parts, one part is used for power supply, and the other part is demodulated and then restored to a communication line signal, so that communication among all parts of the air conditioning equipment is realized.

The embodiment of the utility model discloses a communication bus 102 through air conditioning equipment transmits communication signal and power supply signal between each functional unit of air conditioning equipment to save the weak current power supply cable in the power supply wire bundle, practiced thrift the cable cost. Meanwhile, because the communication bus 102 can simultaneously perform signal transmission and energy transmission, the indoor units 204 of the air-conditioning equipment are directly connected to the communication bus 102, and the indoor units 204 do not need to be sequentially connected in series in a hand-pulled manner, so that when the air-conditioning equipment has the requirement of newly adding an indoor unit 204, the communication between the newly added indoor unit 204 and the air-conditioning system can be realized only by completing the mains supply connection and the communication connection of the indoor unit 204, and a communication line and a weak current cable do not need to be connected to the tail end of the installed air-conditioning system, thereby reducing the difficulty in installing and wiring.

In some embodiments of the present invention, the voltage module 104 includes: a first communication chip 1041 connected to the communication bus 102; the switch tube 1042, a source of the switch tube 1042 is used for receiving a power supply signal, a gate of the switch tube 1042 is connected to the first communication chip 1041, and a drain of the switch tube 1042 is connected to the positive bus 1022.

In the embodiment of the present invention, the voltage modulation module specifically includes a first communication chip 1041 and a switch tube 1042.

The first communication chip 1041 may be, for example, an MDV-Link chip, a pin 1 of the first communication chip 1041 is connected to a gate of the switch tube 1042, the switch tube 1042 may be an MOS (Metal-Oxide-Semiconductor Field-Effect transistor), a source and a drain of the switch tube 1042 are respectively connected to the power supply signal and the positive bus 1022 in the communication bus 102, and the first communication chip 1041 modulates the communication signal between the components of the air conditioner into a readable wide voltage signal, that is, the voltage signal, by controlling an on-off state of the switch tube 1042.

In some embodiments, the supply signal is a 24V supply signal.

The voltage signal is transmitted on the communication bus 102, and when other components of the air conditioner, such as the control module of the indoor unit 204, receive the wide voltage signal, a part of the wide voltage signal is rectified and regulated by the power supply module of the control module to form power supply signals of 24V, 18V, 12V and 3.3V, so as to supply power to each module of the indoor unit 204.

The other part of the wide voltage signal is received by a demodulation chip in the control module of the indoor unit 204, demodulated and restored into a corresponding communication signal, and data signal transmission between each module and each component is realized according to the communication signal, so that the normal communication function among all the components in the air conditioning system is ensured.

The embodiment of the utility model discloses a communication bus 102 through air conditioning equipment transmits communication signal and power supply signal between each functional unit of air conditioning equipment to save the weak current power supply cable in the power supply cable harness, practiced thrift the cable cost. Meanwhile, because the communication bus 102 can simultaneously perform signal transmission and energy transmission, the indoor units 204 of the air-conditioning equipment are directly connected to the communication bus 102, and the indoor units 204 do not need to be sequentially connected in a hand-in-hand manner, so that when the air-conditioning equipment has the requirement of adding an indoor unit 204, the communication between the added indoor unit 204 and the air-conditioning system can be realized only by completing the mains supply connection and the communication connection of the indoor unit 204, and a communication line and a weak current cable do not need to be connected to the tail end of the installed air-conditioning system, thereby reducing the difficulty in installing and wiring.

Meanwhile, as the weak current power supply is integrated on the communication bus 102, no weak current cable is required to be arranged, the indoor unit 204 can be connected with the mains supply nearby, and no strong current cable parallel to the communication bus 102 is required to be arranged, so that the signal interference of the strong current cable on the communication cable is avoided, the communication cable does not require a shielding twisted pair with high cost, and the cable cost is further reduced.

When the indoor unit 204 is powered off, the main control board, the electronic expansion valve and other components can still get electricity through the communication bus 102, so that the electronic expansion valve can be closed at the first time after the indoor unit is powered off, the refrigerant pipeline of the powered-off indoor unit is cut off, the phenomena of liquid impact, condensation and water dripping of a compressor and the like are avoided, and the reliability of air conditioning equipment is improved.

On the basis of any of the above embodiments, fig. 3 shows a second schematic structural diagram of the communication power supply circuit according to the embodiment of the present invention, fig. 4 shows a schematic structural diagram of a current module according to the embodiment of the present invention, and as shown in fig. 3 and fig. 4, the current module 106 includes: the second communication chip 1062 is connected to the communication bus 102, and is configured to determine a communication signal according to the voltage signal; the power supply circuit 1064 is connected to the communication bus 102, and is configured to generate a second power supply signal according to the voltage signal.

The embodiment of the present invention provides an electric current module 106 is specifically a high-frequency pulse electric current module, which can be disposed on functional modules such as an indoor unit, a heating device, a refrigerant switching device, and a line control device of a central air conditioner, and the high-frequency pulse electric current module specifically includes a second communication chip 1062 and a power supply circuit 1064.

The second communication chip 1062 may also be a chip such as an MDV-Link.

Specifically, under the modulation of the first communication chip 1041, the communication signal is modulated into a readable wide voltage signal, i.e., the above-mentioned voltage signal, and transmitted on the communication bus 102. The current module 106 is coupled to the communication bus 102 to obtain a wide voltage signal that is communicated on the communication bus 102.

After the wide voltage signal is received by the current module 106, a part of the wide voltage signal is received by the power supply circuit 1064, and is rectified by the rectifying part and the voltage regulating part of the power supply circuit 1064 to obtain a DC power supply signal with a stable voltage according to the power supply requirements of the modules, such as power supply signals of 24V DC, 18V DC, 12V DC, and 3.3V DC, so as to supply power to components such as the line Controller 210, the relay, the electronic expansion valve, the display panel, the Micro Controller Unit (MCU), the temperature sensor, and the water level sensor.

The other part of the wide voltage signal is received by the second communication chip 1062, and is demodulated and restored to a corresponding communication signal under the regulation of the second communication chip 1062, so as to be received by the components such as the line Controller 210, the relay, the electronic expansion valve, the display panel, the processor (MCU, Micro Controller Unit), the temperature sensor, the water level sensor, and the like, thereby realizing the data signal transmission between the modules and the components and ensuring the normal communication function between the components in the air conditioning system.

Meanwhile, the second communication chip 1062 can also modulate communication signals sent by the components such as the line controller 210, the relay, the electronic expansion valve, the display panel, the processor, the temperature sensor, the water level sensor, and the like to generate high-frequency pulse current signals, which are also transmitted on the communication bus 102 and can be received by other devices, and other devices on the communication bus 102 can demodulate the current signals to obtain corresponding communication signals, thereby realizing signal communication between the modules.

The embodiment of the utility model discloses a communication bus 102 through air conditioning equipment, transmission communication signal and power supply signal between each functional unit of air conditioning equipment, the cable cost has been practiced thrift, the degree of difficulty of installation wiring has been reduced, and when the indoor set 204 falls the electricity appearing, the main control board, subassembly such as electronic expansion valve still can get the electricity through communication bus 102, consequently can fall the electricity back very first time at the indoor set and close electronic expansion valve, make the indoor set refrigerant pipeline that falls the electricity end, thereby avoid compressor liquid attack, the emergence of phenomenons such as condensation drips, improve air conditioning equipment's reliability.

On the basis of any of the above embodiments, as shown in fig. 1 and fig. 2, the voltage module 104 further includes: an input end of the driving module 1043 is connected to the first communication chip 1041, and an output end of the driving module 1043 is connected to the switch tube 1042.

In the embodiment of the present invention, the first communication chip 1041 may be a chip such as an MDV-Link, and a pin of the first communication chip 1041 is connected to a gate of the switch tube 1042, wherein the switch tube 1042 may be an MOS tube, and the driving module 1043 is a driving circuit of the MOS tube.

Specifically, the driving circuit includes a transistor Q1, a transistor Q2, and a transistor Q3, wherein a base of the transistor Q1 is connected to a pin of the first communication line chip, an emitter of the transistor Q1 is grounded through a resistor R2, a collector of the transistor Q1 is connected to a base of the transistor Q2 and a base of the transistor Q3, an emitter of the transistor Q3 is connected to an emitter of the transistor Q2, a collector of the transistor Q3 is grounded, and a collector of the transistor Q2 is connected to a source of the switching tube 1042 through a resistor.

The driving circuit further comprises a resistor R20, one end of the resistor R20 is connected to the gate of the switching tube 1042, the other end of the resistor R20 is connected to the resistor R3 and the capacitor C1, wherein the resistor R3 and the capacitor C1 are connected in parallel, and the other ends of the resistor R3 and the capacitor C1 are connected to the emitter of the transistor Q3 and the emitter of the transistor Q2.

The first communication chip 1041 controls the on-off state of the switch tube 1042 through the driving module 1043, and modulates and forms the communication signals among the components of the air conditioning equipment into readable wide voltage signals, namely the voltage signals, so that the communication signals and the power supply signals are transmitted among the functional components of the air conditioning equipment through the communication bus 102 of the air conditioning equipment, the cost of cables is saved, the difficulty of installing and wiring is reduced, and the reliability of the air conditioning equipment is improved.

On the basis of any of the above embodiments, as shown in fig. 1 and fig. 2, the voltage module 104 further includes: a sampling module 1044, a sampling end of the sampling module 1044 is connected to the positive bus 1022, and an output end of the sampling module 1044 is connected to the first communication chip 1041.

In the embodiment of the present invention, the voltage module 104 further includes a sampling module 1044, and the sampling module 1044 includes a sampling end and an output end, wherein the sampling end is connected to the positive bus 1022 of the communication bus 102 for obtaining the electrical signal on the positive bus 1022, including the above-mentioned wide voltage signal, and transmitting the voltage signal to the first communication chip 1041 through the output end.

The first communication chip 1041 can determine whether the modulated voltage signal is normal or not, including whether the included communication signal is normal or not, whether the voltage is normal or not, etc., through the sampling signal of the voltage signal collected by the sampling module 1044, thereby adjusting the control on the driving module 1043 and the switching tube 1042, ensuring the correctness of the voltage signal on the communication bus 102, and forming a closed-loop control.

On the basis of any of the above embodiments, as shown in fig. 1 and fig. 2, the voltage module 104 further includes: and an intermediate level circuit 1045 connected to the sampling module 1044 and the first communication chip 1041.

In the embodiment of the present invention, the voltage module 104 further includes an intermediate level circuit 1045, one end of the intermediate level circuit 1045 is connected to the sampling module 1044, and the other end of the intermediate level circuit is connected to the first communication chip 1041, so as to provide an intermediate level signal required for the first communication chip.

Specifically, the intermediate-level circuit 1045 includes a chip IC2, and the Vin pin of the chip IC2 is connected to the 12V reference electrical signal and grounded through a capacitor C23. The Vout pins of the IC2 are all connected in series and to the positive bus 1022, and between the positive bus 1022 and the Vout pins, there are also connected in series an inductor L1, a resistor R17, a diode D1 and a resistor R7.

An ADJ pin of the chip IC2 is connected to a collector of the transistor Q4, an emitter of the transistor Q4 is grounded, and a base of the transistor Q4 is connected to a CONM pin of the first communication chip 1041 through a resistor R4.

On the basis of any of the above embodiments, as shown in fig. 1 and fig. 2, the voltage module 104 further includes: the first protection circuit 1046, connected to the first communication chip 1041, includes: a first capacitor 10462, a first end of the first capacitor 10462 is connected to the first communication chip 1041, and a second end of the first capacitor 10462 is grounded; a first resistor 10464 is connected in parallel with the first capacitor 10462.

The embodiment of the present invention provides a first protection circuit 1046 is provided in the voltage module 104, specifically, the first protection circuit 1046 is a short-circuit protection circuit, the first protection circuit 1046 includes a first capacitor 10462 and a first resistor 10464, wherein the first end of the first capacitor 10462 is connected with the diode D1 through the resistor R13 and is connected with the first communication chip 1041, and the second end of the first capacitor 10462 is connected with the ground point.

The first resistor 10464 is connected in parallel with the first capacitor 10462, and specifically, a first terminal of the first resistor 10464 is connected to a first terminal of the first capacitor 10462, and a second terminal of the first resistor 10464 is connected to ground.

By arranging the first protection circuit 1046, the first chip can be protected when a short-circuit fault occurs, the voltage module 104 is protected, device damage due to short circuit is avoided, and reliability of the communication circuit is improved.

On the basis of any of the above embodiments, as shown in fig. 1 and fig. 2, the communication bus 102 further includes a negative bus 1024, and the voltage module 104 further includes: the charge discharging circuit 1047, which is connected to the communication bus 102, includes: a first transistor 10472, an emitter of the first transistor 10472 being connected to the positive bus 1022; a second resistor 10474, wherein a first terminal of the second resistor 10474 is connected to the base of the first transistor 10472; a third resistor 10476, a first terminal of the third resistor 10476 being connected to the positive bus 1022, and a second terminal of the third resistor 10476 being connected to a second terminal of the second resistor 10474; and a second transistor 10478, wherein an emitter of the second transistor 10478 is connected to the second terminal of the third resistor 10476, a base of the second transistor 10478 is connected to a collector of the first transistor 10472, and a collector of the second transistor 10478 is grounded.

In the embodiment of the present invention, the communication bus 102 carries a power supply signal, and therefore includes the positive bus 1022 and the negative bus 1024, and it can be understood that the connection modes of the positive bus 1022 and the negative bus 1024 can be exchanged. Because the wide voltage signal of pass on communication bus 102, consequently each part on the voltage module 104, can be in charged state on the condenser like, the signal of telecommunication on communication bus 102 disappears, when the system shut down, can lead to the electric potential in the voltage module 104 to be higher than communication bus 102, for avoiding the reverse release of signal of telecommunication, the utility model discloses set up charge release circuit 1047, can be when communication bus 102 cuts off the power supply, the electric charge in the voltage module 104 is released to guarantee communication line's safety, improve communication circuit's reliability.

Specifically, the charge discharging circuit 1047 includes a first transistor 10472, a second transistor 10478, a second resistor 10474, and a third resistor 10476. An emitter of the first transistor 10472 is connected to the positive bus 1022, a collector of the first transistor 10472 is connected to a base of the second transistor 10478, and a base of the first transistor 10472 is connected to the positive bus 1022 through the second resistor 10474 and the third resistor 10476. One end of the second resistor 10474 is connected to the base of the first transistor 10472, the other end of the second resistor 10474 is connected to one end of the third resistor 10476, and the other end of the third resistor 10476 is connected to the positive bus 1022.

The collector of the second transistor 10478 is connected to ground, and the emitter of the second transistor 10478 is connected to the common terminal of the second resistor 10474 and the third resistor 10476.

On the basis of any of the above embodiments, as shown in fig. 3 and fig. 4, the current module 106 further includes: a flip circuit, comprising: an input bus connected to the communication bus 102; an output bus having a polarity opposite to the polarity of the communication bus 102.

In the embodiment of the present invention, the communication bus 102 carries a power supply signal, and therefore includes the positive bus 1022 and the negative bus 1024, and in order to improve the compatibility of the system, the connection mode of the positive bus 1022 and the negative bus 1024 can be exchanged.

Specifically, two flip circuits are provided in the current module 106, one end of each flip circuit 1068 is connected to the positive bus 1022, and the other end of each flip circuit 1068 is connected to the negative bus 1024. One end of the flip circuit 1068 is connected to the negative bus 1024, and the other end of the flip circuit 1068 is connected to the positive bus 1022.

The flip-flop circuit 1068 includes a chip IC1, the flip-flop circuit 1068 includes a diode ZD2, one end of the diode ZD2 is connected to the positive bus 1022, the other end of the diode ZD2 is connected to a G1 pin of the chip IC1 through a resistor R219, an S1 pin of the chip IC1 is grounded, and a D1 pin of the chip IC1 is connected to the negative bus 1024.

The flip circuit 1068 includes a diode ZD3, one end of the diode ZD3 is connected to the negative bus 1024, the other end of the diode ZD3 is connected to the G2 pin of the chip IC2 through a resistor R216, the S2 pin of the chip IC1 is grounded, and the D2 pin of the chip IC1 is connected to the positive bus 1022.

On the basis of any of the above embodiments, as shown in fig. 3 and 4, the current module 106 further includes: the second protection circuit 1066, connected to the communication bus 102, includes: a first transient diode 10662, a first terminal of the first transient diode 10662 is connected to the positive bus 1022, and a second terminal of the first transient diode 10662 is grounded; and a second transient diode 10664, wherein a first terminal of the second transient diode 10664 is connected to the negative bus 1024 and a second terminal of the first transient diode 10662 is connected to ground.

In the embodiment of the present invention, the current module 106 further includes a second protection circuit 1066, wherein the second protection circuit 1066 is specifically a TVS (Transient Voltage regulator) protection circuit.

Specifically, the second protection circuit 1066 includes a first transient diode 10662 and a second transient diode 10664, wherein the first transient diode 10662 is connected in series between the positive bus 1022 and ground, and the second transient diode 10664 is connected in series between the negative bus 1024 and ground. The transient diode is a high-efficiency protection device, and when two poles of the transient diode receive high-energy impact of reverse transient, the high impedance between the two poles can be changed into low impedance at a high speed, so that surge power is absorbed, components in a circuit are effectively protected from being affected by surge current, damage caused by surge pulse is avoided, and the reliability of the communication power supply circuit 100 is improved.

Example two

In some embodiments of the present invention, a multi-split air conditioning device is provided, fig. 5 shows a block diagram of a multi-split air conditioning device according to the present invention, as shown in fig. 5, this multi-split air conditioning device 200 includes the communication power supply circuit 100 provided in any of the above embodiments, therefore, this multi-split air conditioning device 200 includes all the beneficial effects of the communication power supply circuit 100 provided in any of the above embodiments simultaneously, and for avoiding repetition, it is not repeated here.

On the basis of any of the above embodiments, fig. 6 shows one of the communication schematic diagrams of the multi-split air conditioning equipment according to the present invention, and as shown in fig. 6, the multi-split air conditioning equipment 200 further includes: an outdoor unit 202; and the indoor unit 204 is connected with the outdoor unit 202 through the communication bus 102.

In the embodiment of the present invention, the multi-split air conditioner 200 may be a central air conditioning system, and the air conditioner includes an outdoor unit 202 and at least one indoor unit 204, wherein the outdoor unit 202 and the indoor unit 204 are connected through a communication bus 102.

The embodiment of the utility model provides a through air conditioning equipment's communication bus 102, transmit communication signal and power supply signal between off-premises station 202 and indoor set 204 to save the weak current power supply cable in the power supply wiring harness, practiced thrift the cable cost. Meanwhile, because the communication bus 102 can simultaneously perform signal transmission and energy transmission, the indoor units 204 of the air-conditioning equipment are directly connected to the communication bus 102, and the indoor units 204 do not need to be sequentially connected in series in a hand-pulled manner, so that when the air-conditioning equipment has the requirement of newly adding an indoor unit 204, the communication between the newly added indoor unit 204 and the air-conditioning system can be realized only by completing the mains supply connection and the communication connection of the indoor unit 204, and a communication line and a weak current cable do not need to be connected to the tail end of the installed air-conditioning system, thereby reducing the difficulty in installing and wiring.

When the indoor unit 204 is powered off, the main control board, the electronic expansion valve and other components can still get electricity through the communication bus 102, so that the electronic expansion valve can be closed at the first time after the indoor unit is powered off, the refrigerant pipeline of the powered-off indoor unit is cut off, the phenomena of liquid impact, condensation, water dripping and the like of the compressor are avoided, and the reliability of the air conditioning equipment is improved.

On the basis of any of the above embodiments, the communication power supply circuit 100 includes the current module 106, and each indoor unit 204 is provided with the current module 106; the voltage module 104 is disposed in the outdoor unit 202.

In the embodiment of the present invention, the outdoor unit 202 serves as a host, and includes a voltage module 104, i.e., a voltage modulation module. The indoor unit 204 serves as a slave and includes a current module 106, i.e., a high-frequency pulse current module. The outdoor unit 202 sends a voltage signal to the indoor unit 204, and a weak load of the indoor unit 204 gets electricity through the voltage signal and acquires a communication signal by demodulating the voltage signal.

When the indoor units 204 transmit communication signals to the outdoor unit 202, the communication signals are carried by the pulse current signals.

On the basis of any of the above embodiments, fig. 7 shows a second communication schematic diagram of the multi-split air conditioning equipment according to the present invention, and as shown in fig. 7, the multi-split air conditioning equipment 200 further includes: the refrigerant switching device 206 includes a current module 106 connected to the outdoor unit 202; the hot water device 208 includes a current module 106, and is connected to the refrigerant switching device 206 and the indoor unit 204.

The embodiment of the utility model provides an in, many online air conditioners still include refrigerant auto-change over device 206 and hot water system 208, and wherein, heat medium auto-change over device is arranged in switching over the refrigerant among the air conditioning system, and hot water system 208 then is used for providing warm up heating and the hydrothermal hot water in whole room.

Specifically, the outdoor unit 202 serves as a host and includes the voltage module 104, i.e., a voltage modulation module. The coolant switching device 206 and the hot water device 208 both serve as slave devices and include a current module 106, i.e., a high-frequency pulse current module. The outdoor unit 202 sends a voltage signal to the indoor unit 204, and the refrigerant switching device 206 and the hot water unit 208 get electricity through the voltage signal and acquire a communication signal by demodulating the voltage signal.

For example, the outdoor unit 202 of the air conditioning equipment is connected to the refrigerant switching device 206, the floor heating and water heating device 208 and the indoor units 204 are connected in sequence to form a chain type communication structure, wherein the slave units, i.e., the refrigerant switching device 206, the water heating device 208 and the indoor units 204 of the air conditioning equipment are communicated with each other through high-frequency pulse current signals. The master unit sends wide voltage signals to the slave units, namely the outdoor unit 202, to the refrigerant switching device 206, the hot water unit 208 and the plurality of air conditioning indoor units 204, and weak current power supply and communication signal transmission are provided through the wide voltage signals.

On the basis of any of the above embodiments, the communication power supply circuit 100 includes the current module 106, and the voltage module 104 is disposed in the indoor unit 204.

The embodiment of the utility model provides an in, indoor set 204 is the host computer, and voltage module 104, also voltage modulation module set up in indoor set 204, and indoor set 204 passes through voltage modulation module modulation and generates voltage signal, supplies power to refrigerant auto-change over device 206, ground heating hot water system 208, other indoor sets 204 or the light current load of drive-by-wire equipment through voltage signal.

The weak current load includes components such as a line Controller 210, a relay, an electronic expansion valve, a display panel, a processor (MCU), a temperature sensor, and a water level sensor.

On the basis of any of the above embodiments, fig. 8 shows a third communication schematic diagram of a multi-split air conditioning apparatus according to the present invention, as shown in fig. 8, the multi-split air conditioning apparatus 200 further includes: the line controller 210, including the current module 106, is connected to the indoor unit 204.

In the embodiment of the present invention, the line controller 210 includes a common line controller 210 and a collection controller, the line controller 210 is a slave device, and the line controller 210 is provided with a current module 106, i.e. a high-frequency pulse current module.

In some embodiments, as shown in fig. 8, the main device is an outdoor unit 202, a voltage module 104, that is, a voltage modulation module, is disposed in the outdoor unit 202, the outdoor unit 202 generates a voltage signal through modulation of the voltage modulation module, sends a wide voltage signal to the line controller 210, the refrigerant switching device 206, the hot water device 208, and the plurality of air conditioning indoor units 204 through the voltage signal, and provides weak current power supply and transmits a communication signal through the wide voltage signal.

In other embodiments, fig. 9 shows a fourth schematic diagram of communication of a multi-split air conditioning apparatus according to the present invention, as shown in fig. 9, the main device is an indoor unit 204, a voltage module 104, i.e., a voltage modulation module, is disposed in the indoor unit 204, the indoor unit 204 generates a voltage signal through modulation of the voltage modulation module, sends a wide voltage signal to the line controller 210, the refrigerant switching device 206, and the hot water device 208 through the voltage signal, and provides a weak current power supply and a transmission communication signal through the wide voltage signal.

Meanwhile, as the weak current power supply is integrated on the communication bus 102, no weak current cable is required to be arranged, so that the indoor unit 204 can be connected with the mains supply nearby, and no strong current cable parallel to the communication bus 102 is required to be arranged, thereby avoiding the signal interference of the strong current cable on the communication cable, and the communication cable does not require a shielding twisted pair with high cost, thereby further reducing the cost of the cable.

EXAMPLE III

The utility model discloses an in some embodiments, propose the application method of MDV-Link communication technology on air conditioning system, solve among the air conditioning system common problem among other communication buses, realize falling the power shut-off valve, arbitrary topology, superstrong interference killing feature, long distance communication.

Specifically, in the related art, the existing main flow communication bus of the central air conditioner includes: 485 and CAN, which have three disadvantages:

first, the communication line can only communicate and can not supply power, can only supply power through two lines when installing the line controller, and two line communications improve installation cost. And when the indoor unit is powered off, the electronic expansion valve cannot be closed in time by using the communication line for power supply, so that a refrigerant pipeline of the indoor unit with the power failure is opened, condensation of the air conditioner is caused to drip, and the compressor is damaged due to liquid impact of the compressor.

Secondly, the communication lines can only adopt a bus type topology, namely, the communication lines are connected by hand, so that a problem is caused, for example, the installation of one set of air conditioning system is already installed and debugged, the communication lines are completely connected by hand, if a user needs to additionally install an air conditioning indoor unit behind, the added air conditioners can only be connected with the communication lines from the tail end of the installed air conditioning system, and the difficulty of installing and wiring is improved.

Third, the interference rejection is poor, which usually requires separate routing of the communication line and the strong line, and requires practical shielding of the twisted pair, thereby avoiding interference to the maximum extent.

The embodiment of the utility model provides an in, MDV-Link communication technology divide into voltage modulation module and high frequency pulse current module, and the main function of voltage modulation module is, modulates communication signal into readable wide voltage signal, and wide voltage signal transmits on the communication line, and this wide voltage signal of connected device demodulation on the communication line receives communication signal. The high-frequency pulse current module is mainly used for modulating a communication signal into a high-frequency pulse current signal, the current signal is transmitted on a communication line, and equipment connected to the communication line demodulates the current signal and receives the communication signal.

And the voltage modulation module controls the peripheral circuit module to realize voltage modulation by the MDV-link communication chip.

The high-frequency pulse current module is arranged in the MDV-Link communication chip.

The application of the MDV-Link communication technology in an air conditioning system mainly comprises three application methods, the first application method is an application method for MDV-Link communication between an internal machine and an external machine, and the application method mainly achieves the functions of power failure valve closing, random topology, super-strong anti-interference capacity and long-distance communication. The second and the third are application methods of MDV-Link communication technology on a line controller, and mainly realize the functions of communication and power supply and strong anti-interference capability.

Specifically, the MDV-Link is applied to communication between an external machine and an internal machine of an air conditioning system, wherein the external machine is used as a host, a voltage modulation module is used, the internal machine is used as a slave, and a high-frequency pulse current module is used. The refrigerant switching device and the floor heating hot water device are the same as the internal machine, and a high-frequency pulse current module is also used.

The MDV-Link communication technology is applied to an online/centralized controller (a wire controller controls a plurality of internal machines), the online/centralized controller uses a high-frequency pulse current module as the internal machines, and the external machines use a voltage modulation module; the line/centralized controller supplies power through an MDV-Link communication bus, and the MDV-Link communication realizes the functions of communication and power supply; the line/centralized controller controls the indoor unit in the system through the slave communication.

The slave communication refers to communication between a slave and a slave, for example, the internal machine is a slave, and the slave communication refers to communication between the internal machine and the slave.

The MDV-Link communication technology is applied to an online/centralized controller (a wire controller controls an indoor unit), and the wire controller is a high-frequency pulse current module which supplies power through the indoor unit to realize both power supply and communication; the voltage modulation module for the indoor unit sends data to the line controller.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 invention. In the present disclosure, a schematic representation of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A communication power supply circuit for an air conditioner, the air conditioner comprising an indoor unit and an outdoor unit, the communication power supply circuit comprising:

a communication bus comprising a positive bus;

the voltage module is arranged on the outdoor unit, is connected with the communication bus and is used for generating a voltage signal, and the voltage signal can transmit a communication signal and supply power;

and the current module is arranged on the indoor unit, is connected with the communication bus, and is used for adjusting the voltage signal and transmitting a current signal upwards, wherein the current signal can transmit the communication signal.

2. The communications supply circuit of claim 1, wherein the voltage module comprises:

the first communication chip is connected with the communication bus;

and the source electrode of the switch tube is used for receiving a power supply signal, the grid electrode of the switch tube is connected with the first communication chip, and the drain electrode of the switch tube is connected with the positive bus.

3. The communications supply circuit of claim 2 wherein the current module comprises:

the second communication chip is connected with the communication bus and used for determining a communication signal according to the voltage signal;

and the power supply circuit is connected with the communication bus and used for generating a second power supply signal according to the voltage signal.

4. The communications supply circuit of claim 2, wherein the voltage module further comprises:

and the input end of the driving module is connected with the first communication chip, and the output end of the driving module is connected with the switch tube.

5. The communications supply circuit of claim 2, wherein the voltage module further comprises:

and the sampling end of the sampling module is connected with the positive bus, and the output end of the sampling module is connected with the first communication chip.

6. The communications power supply circuit of claim 5, wherein the voltage module further comprises:

and the intermediate level circuit is connected with the sampling module and the first communication chip.

7. The communications supply circuit of claim 2, wherein the voltage module further comprises:

a first protection circuit connected to the first communication chip, including:

a first end of the first capacitor is connected with the first communication chip, and a second end of the first capacitor is grounded;

and the first resistor is connected with the first capacitor in parallel.

8. The communications power supply circuit of claim 3 wherein the communications bus further comprises a negative bus, the voltage module further comprising:

a charge-discharge circuit connected to the communication bus, comprising:

the emitting electrode of the first triode is connected with the positive bus;

the first end of the second resistor is connected with the base electrode of the first triode;

a first end of the third resistor is connected with the positive bus, and a second end of the third resistor is connected with a second end of the second resistor;

and the emitting electrode of the second triode is connected with the second end of the third resistor, the base electrode of the second triode is connected with the collecting electrode of the first triode, and the collecting electrode of the second triode is grounded.

9. The communications supply circuit of claim 3, wherein the current module further comprises:

a flip circuit, comprising:

an input bus connected with the communication bus;

an output bus having a polarity opposite to a polarity of the communication bus.

10. The communications supply circuit of claim 8, wherein the current module further comprises:

a second protection circuit connected to the communication bus, comprising:

a first transient diode, a first end of the first transient diode being connected to the positive bus, a second end of the first transient diode being grounded;

and the first end of the second transient diode is connected with the negative bus, and the second end of the first transient diode is grounded.

11. A multi-split air conditioning apparatus, comprising:

the communications power supply circuit of any one of claims 1 to 10.

12. The multi-split air conditioning apparatus as claimed in claim 11, further comprising:

an outdoor unit;

and the indoor unit is connected with the outdoor unit through the communication bus.

13. The multi-split air conditioning equipment as claimed in claim 12, wherein the communication power supply circuit includes a current module, and each of the indoor units is provided with the current module;

the voltage module is arranged in the outdoor unit.

14. The multi-split air conditioning apparatus as claimed in claim 13, further comprising:

the refrigerant switching device comprises the current module and is connected with the outdoor unit;

the water heating device comprises the current module, and is connected with the refrigerant switching device and the indoor unit.

15. The multi-split air conditioning apparatus as claimed in claim 12, wherein the communication power supply circuit includes a current module, and the voltage module is provided in the indoor unit.

16. A multi-split air conditioning apparatus as recited in any one of claims 13 to 15, further comprising:

and the wire controller comprises the current module and is connected with the indoor unit.