CN112268357A - Air conditioner communication control circuit and air conditioner - Google Patents
Air conditioner communication control circuit and air conditioner Download PDFInfo
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- CN112268357A CN112268357A CN202011087008.8A CN202011087008A CN112268357A CN 112268357 A CN112268357 A CN 112268357A CN 202011087008 A CN202011087008 A CN 202011087008A CN 112268357 A CN112268357 A CN 112268357A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
Abstract
The invention discloses an air conditioner communication control circuit and an air conditioner, wherein a first end of a power supply control loop is connected with a differential mode inductance unit, a first communication module is connected with a common mode inductance unit, the differential mode inductance unit is respectively connected with the first communication module and the common mode inductance unit, the common mode inductance unit is connected with a second communication module, a common joint of a first end of a short circuit detection unit and a second end of a current detection unit is the first end of the power supply control loop, and the first end of the current detection unit is connected with a first end of a voltage source conduction unit, so that the parallel connection of differential mode inductances is avoided, and the communication quality is improved.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an air conditioner communication control circuit and an air conditioner.
Background
With the rapid development of the technology, the quality of life of human beings is higher and higher, and people have more and more occasions for using the multi-split air conditioner. The multi-split air conditioner has strong refrigerating and heating capacities, and one outdoor unit can drag a plurality of indoor units, thereby reducing the external hanging area of the outdoor unit of the air conditioner and reducing the building cost of real estate houses. Meanwhile, a plurality of indoor units in the multi-split air conditioner can be controlled by one controller, so that the purchase quantity of the controllers is reduced, and the use cost of the air conditioner is reduced. When the communication mode of the line controller and the indoor unit selects HOMEBUS communication, the indoor unit is mostly adopted to supply power to the line controller through a communication line. Meanwhile, in order to increase the communication distance between the wire controller and the indoor unit, the indoor unit and the wire controller are provided with differential mode inductors to improve the communication capacity, so that peripheral circuits of communication modules of the wire controller and the indoor unit are designed in a matching mode according to the inductance.
For example, as shown in the figure, when one wire controller drives multiple indoor units in the prior art, the time difference mode inductance of the wire controller driving the multiple indoor units is equivalent to that of multiple differential mode inductances which are connected in parallel, so that the inductance of the differential mode inductance is reduced, the matching performance of the wire controller with the resistance capacitance and the like in the peripheral circuit of the communication module of the indoor unit is deteriorated, and the communication quality is seriously affected. And even cause an inability to communicate. Meanwhile, the peripheral matching circuit of the communication module of the wire controller and the indoor unit cannot be changed, because the shipment cannot know whether the indoor unit and the wire controller are one-to-one or multiple-to-multiple. And VCC and GND that the drive-by-wire ware supplied power carry out the multiple spot power supply by a plurality of indoor sets, very easily cause the power unstable.
Therefore, how to avoid the parallel connection of the differential mode inductors so as to improve the communication quality is a technical problem to be solved in the field.
Disclosure of Invention
The invention provides an air conditioner communication control circuit and an air conditioner, which are used for solving the technical problem that in the prior art, when a wire controller has one or more indoor units, inductors are in a parallel connection state, and further the communication quality is influenced.
In some embodiments of the present application, the air conditioner communication control circuit includes a line controller module and a plurality of indoor unit modules,
the indoor unit module comprises:
the voltage source is used for providing power supply voltage for the line controller module and the indoor unit modules;
the differential mode inductance unit is connected with the voltage source and is used for filtering differential mode interference of the voltage source;
the common-mode inductance unit is used for filtering the common-mode interference of the circuit;
the first communication module is used for communicating with the second communication module;
the line controller module comprises:
the second communication module is used for communicating with the first communication module;
the indoor unit module further comprises a power supply control loop, the power supply control loop is connected with the voltage source, and the power supply control loop comprises:
the voltage source conduction unit is used for controlling the on-off of the voltage source;
the short circuit detection unit is used for judging whether the circuit is short-circuited or not and disconnecting the voltage source when the circuit is short-circuited;
the current detection unit is used for disconnecting the voltage source when the current of the circuit is greater than a preset threshold value;
the first end of the power supply control loop is connected with the differential mode inductance unit, the first communication module is connected with the common mode inductance unit, the differential mode inductance unit is respectively connected with the first communication module and the common mode inductance unit, the common mode inductance unit is connected with the second communication module, the common joint point of the first end of the short circuit detection unit and the second end of the current detection unit is the first end of the power supply control loop, and the first end of the current detection unit is connected with the first end of the voltage source conduction unit.
In some embodiments of the present invention, the air conditioner communication control circuit includes a voltage source conducting unit including a first IO port, a first transistor, a first resistor, and a ground terminal,
the first IO port is connected with the base electrode of the first triode, the emitting electrode of the first triode is connected with the grounding end, the collecting electrode of the first triode is connected with the first end of the first resistor, and the second end of the first resistor is the first end of the voltage source conduction unit.
In some embodiments of the present invention, the air conditioner communication control circuit includes a current detection unit including a second resistor, a second transistor, a third resistor, a third transistor, and a diode,
the common junction of the first end of the second resistor, the collector of the second triode and the base of the third triode is the first end of the current detection unit, the second end of the second resistor, the emitter of the second triode and the common junction of the first end of the third resistor are connected with the voltage source, the base of the second triode and the common junction of the second end of the third resistor are connected with the emitter of the third triode, the collector of the third triode is connected with the anode of the diode, and the cathode of the diode is the second end of the current detection unit.
In some embodiments of the present invention, the short circuit detection unit includes a second IO port, an optocoupler, a fourth resistor, a fifth resistor, and a ground terminal,
the first end of fourth resistance is connected 5V voltage, the second IO port with the joint connection of the second end of fourth resistance the first end of opto-coupler, the third end and the fourth end of opto-coupler all link to each other with the earthing terminal, the second end of opto-coupler with the second end of fifth resistance, the first end of fifth resistance is the first end of short circuit detecting element.
The invention also provides an air conditioner, which comprises the air conditioner communication control circuit, and further comprises:
the refrigerant circulation loop circulates the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
one of the outdoor heat exchanger and the indoor heat exchanger works for the condenser, and the other works for the evaporator;
and the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator.
By applying the technical scheme, the forward and reverse switches are connected with the motor, the voltage source is respectively connected with the differential mode inductance unit and the power supply control loop, the first end of the power supply control loop is connected with the differential mode inductance unit, the first communication module is connected with the common mode inductance unit, the differential mode inductance unit is respectively connected with the first communication module and the common mode inductance unit, the common mode inductance unit is connected with the second communication module, the common connection point of the first end of the short circuit detection unit and the second end of the current detection unit is the first end of the power supply control loop, the first end of the current detection unit is connected with the first end of the voltage source conduction unit, parallel connection of differential mode inductances is avoided, and therefore communication quality is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram showing a circuit configuration when one drive-by-wire unit carries a plurality of indoor units in the prior art.
Fig. 2 is a schematic diagram illustrating a structure of an air conditioner communication control circuit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating a circuit structure of a power supply control loop according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As described in the background art, in the prior art, when one line controller drives a plurality of indoor units, the differential mode inductance is equivalent to a plurality of differential mode inductances which are connected in parallel, so that the inductance of the differential mode inductance is reduced, the matching performance of the line controller and a resistance capacitor and the like in a peripheral circuit of a communication module of the indoor unit is deteriorated, and the communication quality is seriously affected.
In order to solve the above problem, the embodiment of the present application provides a door switch safety control circuit, the forward and reverse switch is connected with the motor, the motor is connected with the enable switch unit and the safety switch unit through the live wire end, the first end of the switch drive unit is connected with the door switch detection unit, the second end of the switch drive unit is connected with the safety switch unit, the door switch is connected with the door switch detection unit, the first end of the door switch safety control unit is connected with the enable switch unit and the safety switch unit respectively, the second end of the door switch safety control unit is connected with an external MCU, the real-time monitoring of the door switch is realized, the safety control signal is sent by the door switch safety control module, and the safety control signal is inconsistent with the motor drive signal, the motor drive signal is stopped being received, thereby the technical problem that the motor always runs without pressing the start button is avoided, and the air conditioner is improved.
Fig. 2 is a schematic structural diagram of an air conditioner communication control circuit according to an embodiment of the present invention,
fig. 3 is a schematic diagram of a circuit structure of a power supply control loop according to an embodiment of the present invention,
the circuit comprises a wire controller module and a plurality of indoor unit modules,
the indoor unit module comprises:
the voltage source 101 is used for providing power supply voltage for the line controller module and the indoor unit modules;
a differential mode inductance unit 102, configured to filter out differential mode interference of the voltage source;
a common mode inductance unit 104 for filtering out common mode interference of the circuit;
a first communication module 103, configured to communicate with the second communication module;
the line controller module comprises:
a second communication module 105 for communicating with the first communication module;
the indoor unit module further comprises a power supply control loop, and the power supply control loop comprises:
a voltage source turn-on unit 201 for controlling the turn-on and turn-off of the voltage source;
a short circuit detection unit 202, configured to determine whether a short circuit occurs in the circuit, and disconnect the voltage source when the short circuit occurs;
a current detection unit 203 for disconnecting the voltage source when the current of the circuit is greater than a preset threshold;
the voltage source 101 is connected 106 to the differential mode inductance unit 102 and the power supply control loop, a first end of the power supply control loop 106 is connected to the differential mode inductance unit 102, the first communication module 103 is connected to the common mode inductance unit 104, the differential mode inductance unit 102 is connected to the first communication module 103 and the common mode inductance unit 104, the common mode inductance unit 104 is connected to the second communication module 105, a common junction point between a first end of the short circuit detection unit 202 and a second end of the current detection unit 203 is a first end of the power supply control loop 106, and a first end of the current detection unit 203 is connected to a first end of the voltage source conduction unit 201.
Specifically, a power supply control loop 106 is added to a voltage source 101 part at the front end of an indoor unit differential mode inductance unit 102, when a line controller drives a plurality of indoor units, the address bits of the indoor units are different, in a communication stage, the indoor units broadcast the address bits of the indoor units, and the indoor unit with the smallest address bit supplies power to the line controller. The power supply control loops of other indoor units close VCC in the loops, differential mode inductance is not connected in parallel, single-point power supply of the wire controller is guaranteed, and communication stability and power supply stability of the wire controller when the wire controller is driven by one power supply are guaranteed.
In order to realize the control of the disconnection of the voltage source, in the preferred embodiment of the present application, as shown in fig. 3, the voltage source conducting unit includes a first IO port, a first transistor Q2, a first resistor R34, a ground terminal,
the first IO port is connected to a base of the first transistor Q2, an emitter of the first transistor Q2 is connected to the ground terminal, a collector of the first transistor Q2 is connected to a first end of the first resistor R34, and a second end of the first resistor R34 is a first end of the voltage source turn-on unit 201.
In order to ensure the safety of the circuit, in the preferred embodiment of the present application, the current detection unit 203 includes a second resistor R36, a second transistor Q3, a third resistor R240, a third transistor Q4, and a diode D15,
the common junction of the first end of the second resistor R36, the collector of the second triode Q3, and the base of the third triode Q4 is the first end of the current detection unit 203, the common junction of the second end of the second resistor R36, the emitter of the second triode Q3, and the first end of the third resistor R240 is connected to the voltage source 101, the common junction of the base of the second triode Q3, and the second end of the third resistor R240 is connected to the emitter of the third triode Q4, the collector of the third triode Q4 is connected to the anode of the diode D15, and the cathode of the diode D15 is the second end of the current detection unit.
In order to detect whether the circuit is short-circuited, in the preferred embodiment of the present application, the short-circuit detection unit 202 includes a second IO port, an optical coupler PC2, a fourth resistor R53, a fifth resistor R29 and a ground terminal,
the first end of fourth resistance R53 connects 5V voltage, the second IO port with the joint connection of the second end of fourth resistance R53 the first end of opto-coupler PC2, the third end and the fourth end of opto-coupler PC2 all link to each other with the earthing terminal, the second end of opto-coupler PC2 with the second end of fifth resistance R29, the first end of fifth resistance R29 is the first end of short circuit detecting element 202.
The working principle of the air conditioner safety control circuit in the embodiment of the present application is described below with reference to fig. 3:
the on-off of VCC is controlled by the high and low levels of IO1, so that the purpose of single-point power supply and parallel connection of the differential mode inductance unit 102 is achieved. When the IO1 is at a high level, the first triode Q2 is turned on, the third triode Q4 is turned on, and the indoor unit supplies power to the line controller; when IO1 is at low level, the first transistor Q2 is not conductive, the third diode Q4 is not conductive, and the indoor unit does not supply power to the line controller. Meanwhile, the short circuit detection function of VCC and GND is also added to the circuit. When VCC and GND do not have a short circuit, optocoupler PC2 is normally on, and IO2 is low level. When VCC and GND short circuit, opto-coupler PC2 can't switch on, IO2 is the high level, can judge whether short circuit through the input high-low level of IO2 port, in time report to the police and cut off the VCC power when taking place short-circuit fault, the current detection circuit of second triode Q3 has been increased, when supply current was too big, can make second triode Q3 switch on, force to turn off third triode Q4 after second triode Q3 switches on, close power supply system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (5)
1. An air conditioner communication control circuit is characterized in that the circuit comprises a wire controller module and a plurality of indoor unit modules,
the indoor unit module comprises:
the voltage source is used for providing power supply voltage for the line controller module and the indoor unit modules;
the differential mode inductance unit is connected with the voltage source and is used for filtering differential mode interference of the voltage source;
the common-mode inductance unit is used for filtering the common-mode interference of the circuit;
the first communication module is used for communicating with the second communication module;
the line controller module comprises:
the second communication module is used for communicating with the first communication module;
the indoor unit module further comprises a power supply control loop, the power supply control loop is connected with the voltage source, and the power supply control loop comprises:
the voltage source conduction unit is used for controlling the on-off of the voltage source;
the short circuit detection unit is used for judging whether the circuit is short-circuited or not and disconnecting the voltage source when the circuit is short-circuited;
the current detection unit is used for disconnecting the voltage source when the current of the circuit is greater than a preset threshold value;
the first end of the power supply control loop is connected with the differential mode inductance unit, the first communication module is connected with the common mode inductance unit, the differential mode inductance unit is respectively connected with the first communication module and the common mode inductance unit, the common mode inductance unit is connected with the second communication module, the common joint point of the first end of the short circuit detection unit and the second end of the current detection unit is the first end of the power supply control loop, and the first end of the current detection unit is connected with the first end of the voltage source conduction unit.
2. The air conditioner communication control circuit of claim 1, wherein the voltage source conducting unit comprises a first IO port, a first transistor, a first resistor, and a ground terminal,
the first IO port is connected with the base electrode of the first triode, the emitting electrode of the first triode is connected with the grounding end, the collecting electrode of the first triode is connected with the first end of the first resistor, and the second end of the first resistor is the first end of the voltage source conduction unit.
3. The air conditioner communication control circuit as claimed in claim 1, wherein the current detecting unit includes a second resistor, a second transistor, a third resistor, a third transistor, a diode,
the common junction of the first end of the second resistor, the collector of the second triode and the base of the third triode is the first end of the current detection unit, the second end of the second resistor, the emitter of the second triode and the common junction of the first end of the third resistor are connected with the voltage source, the base of the second triode and the common junction of the second end of the third resistor are connected with the emitter of the third triode, the collector of the third triode is connected with the anode of the diode, and the cathode of the diode is the second end of the current detection unit.
4. The air conditioner communication control circuit of claim 1, wherein the short circuit detection unit comprises a second IO port, an optical coupler, a fourth resistor, a fifth resistor and a ground terminal,
the first end of fourth resistance is connected 5V voltage, the second IO port with the joint connection of the second end of fourth resistance the first end of opto-coupler, the third end and the fourth end of opto-coupler all link to each other with the earthing terminal, the second end of opto-coupler with the second end of fifth resistance, the first end of fifth resistance is the first end of short circuit detecting element.
5. An air conditioner characterized in that the air conditioner includes the air conditioner voltage control circuit according to any one of claims 1 to 4, further comprising:
the refrigerant circulation loop circulates the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
one of the outdoor heat exchanger and the indoor heat exchanger works for the condenser, and the other works for the evaporator;
and the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011087008.8A CN112268357B (en) | 2020-10-12 | 2020-10-12 | Air conditioner communication control circuit and air conditioner |
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| CN202011087008.8A CN112268357B (en) | 2020-10-12 | 2020-10-12 | Air conditioner communication control circuit and air conditioner |
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|---|---|
| CN112268357B (en) | 2022-06-10 |
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