CN111912085A - Drive circuit and air conditioner - Google Patents

Drive circuit and air conditioner Download PDF

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Publication number
CN111912085A
CN111912085A CN202010443397.7A CN202010443397A CN111912085A CN 111912085 A CN111912085 A CN 111912085A CN 202010443397 A CN202010443397 A CN 202010443397A CN 111912085 A CN111912085 A CN 111912085A
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China
Prior art keywords
resistor
unit
communication unit
main control
control unit
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Granted
Application number
CN202010443397.7A
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Chinese (zh)
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CN111912085B (en
Inventor
尹磊
张明磊
王乐三
刘晓飞
陈建兵
刘海龙
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Hisense Shandong Air Conditioning Co Ltd
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Hisense Shandong Air Conditioning Co Ltd
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Priority to CN202010443397.7A priority Critical patent/CN111912085B/en
Publication of CN111912085A publication Critical patent/CN111912085A/en
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Publication of CN111912085B publication Critical patent/CN111912085B/en
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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
    • 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
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Electric Motors In General (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a driving circuit and an air conditioner, wherein the driving circuit comprises a main control unit, a driving unit, a first communication unit, a second communication unit, a third communication unit and a fourth communication unit, the first communication unit is connected with a first output interface of the main control unit and a first input interface of the driving unit through a first resistor, the second communication unit is connected with a second output interface of the main control unit and a second input interface of the driving unit through a second resistor, the third communication unit is connected with the second input interface of the main control unit and the second output interface of the driving unit through a third resistor, and the fourth communication unit is connected with the first input interface of the main control unit and the first output interface of the driving unit through a fourth resistor, so that the driving unit is externally arranged, and the production cost is reduced, and real-time monitoring the real-time state of the fan motor.

Description

Drive circuit and air conditioner
Technical Field
The present disclosure relates to the field of driving circuits, and more particularly, to a driving circuit and an air conditioner.
Background
In the field of air conditioners, a driving circuit is a commonly used circuit and is mainly used for controlling a fan motor in an air conditioner, most of the existing indoor fans of the air conditioners adopt a direct current brushless motor, and the direct current brushless motor is usually driven by the driving circuit with a built-in driving unit.
However, the built-in driving motor in the prior art has the following characteristics:
the direct current motor adopted by an air conditioner manufacturer in the industry is mostly a motor with a built-in driving unit, the air conditioner manufacturer only needs to continuously adjust the duty ratio to realize the control of the rotating speed, and the control is simpler; but the built-in driving motor has obvious defects, high cost and low efficiency; meanwhile, the built-in scheme cannot reflect the real-time state of the fan motor in real time, and the indoor motor cannot know which fault occurs when the indoor motor fails, so that the motor with the built-in driving unit cannot meet the intelligent requirements for filter screen detection, electric quantity detection and the like along with the increasing intelligence of the air conditioner.
Therefore, how to provide a driving circuit can monitor the real-time state of the fan motor in real time, and can save the cost at the same time, which is a technical problem to be solved at present.
Disclosure of Invention
The invention provides a driving circuit and an air conditioner, which are used for solving the technical problems that the driving circuit in the prior art cannot reflect the real-time state of a fan motor in real time and is high in cost.
In a driving circuit provided in a first embodiment of the present invention, the driving circuit includes a main control unit, a driving unit, a first communication unit, a second communication unit, a third communication unit, and a fourth communication unit,
the first communication unit is connected with the first output interface of the main control unit and the first input interface of the driving unit through a first resistor, the second communication unit is connected with the second output interface of the main control unit and the second input interface of the driving unit through a second resistor, the third communication unit is connected with the second input interface of the main control unit and the second output interface of the driving unit through a third resistor, and the fourth communication unit is connected with the first input interface of the main control unit and the first output interface of the driving unit through a fourth resistor,
the first communication unit is used for sending a first control signal of the main control unit to the driving unit;
the second communication unit is used for sending a second control signal of the main control unit to the driving unit;
the third communication unit is used for sending a second feedback signal of the driving unit corresponding to the second control signal to the main control unit;
the fourth communication unit is used for sending a first feedback signal of the driving unit corresponding to the first control signal to the main control unit;
the first resistor, the second resistor, the third resistor and the fourth resistor are detachable elements.
In the driving circuit provided in the first embodiment of the present invention, the first communication unit includes a first capacitor, a first resistor, a fifth resistor, and a second capacitor, the fourth communication unit includes a transistor, a fourth resistor, a sixth resistor, a seventh resistor, and a fourth capacitor,
the common junction point of the first end of the first capacitor and the first end of the first resistor is connected with the first output interface of the main control unit, the second end of the first capacitor, the second end of the fifth resistor and the second end of the second capacitor are all grounded, the common junction point of the second end of the first resistor, the first end of the fifth resistor and the first end of the second capacitor is connected with the first input interface of the driving unit,
the first end of the fourth resistor is connected with the first input port of the main control unit, the second end of the fourth resistor is connected with the collector of the triode, the common junction of the emitter of the triode, the first end of the seventh resistor and the second end of the fourth capacitor is grounded, the common junction of the base of the triode and the second end of the seventh resistor is connected with the first end of the sixth resistor, and the common junction of the second end of the sixth resistor and the first end of the fourth capacitor is connected with the first output interface of the driving unit;
wherein the first capacitor is specifically an electrolytic capacitor.
In the driving circuit provided in the first embodiment of the present invention, the second communication unit includes a second resistor and a third capacitor, the third communication unit includes a third resistor and a fifth capacitor,
the first end of the second resistor is connected with the second output interface of the main control unit, the common joint point of the second end of the second resistor and the first end of the third capacitor is connected with the second input interface of the driving unit, the second end of the third capacitor is grounded,
the first end of the third resistor is connected with the second input interface of the main control unit, the common joint of the second end of the third resistor and the first end of the fifth capacitor is connected with the second output interface of the driving unit, and the second end of the fifth capacitor is grounded.
In the driving circuit provided by the first embodiment of the present invention, the driving circuit further includes a dc voltage VDC, a dc voltage 15V and a dc ground GND,
the direct-current voltage VDC, the direct current 15V, the direct-current grounding end GND, the first communication unit, the second communication unit, the third communication unit and the fourth communication unit are integrated in the five-core VH socket.
In the driving circuit provided in the first embodiment of the present invention, the first output interface of the master control unit is specifically a speed control VSP interface, the first input interface of the driving unit is specifically a P1.6 interface, the first input interface of the master control unit is specifically a feedback output FG interface, the first output interface of the driving unit is specifically a P0.5 interface, the second output interface of the master control unit is specifically a data reception RXD interface, the second input interface and the second output interface of the driving unit are specifically P0.6 interfaces, and the second input interface of the master control unit is specifically a data transmission TXD interface.
In a second embodiment of the present invention, an air conditioner includes the driving circuit according to the first embodiment, and further includes:
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;
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;
an indoor environment temperature sensor for detecting an indoor environment temperature;
and the indoor coil temperature sensor is used for detecting the temperature of the indoor coil.
Through using above technical scheme, through setting up first communication unit, second communication unit, third communication unit and fourth communication unit, realize the drive unit is external, and based on the communication unit goes on main control unit with data interaction between the drive unit can be in real time with main control unit's control signal or drive unit's feedback signal transmits, has reduced manufacturing cost to can real-time supervision drive unit control's fan motor's real-time status.
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 perspective view showing an external appearance of an air conditioner according to an embodiment.
Fig. 2 is a circuit diagram schematically showing the configuration of an air conditioner according to the embodiment.
Fig. 3 is a block diagram showing an outline of the configuration of the control system of the air conditioner.
Fig. 4 shows a schematic structural diagram of a driving circuit according to an embodiment of the present invention.
Fig. 5 shows a schematic structural diagram of a driving circuit according to another embodiment of the present invention.
Description of the reference symbols
1: an air conditioner; 2: an outdoor unit; 3: an indoor unit; 10: a refrigerant circuit; 11: a compressor; 12: a four-way switching valve; 13: an outdoor heat exchanger;
14: an expansion valve; 16: an indoor heat exchanger; 21: an outdoor fan; 31: an indoor fan; 32: an indoor temperature sensor; 33: an indoor heat exchanger temperature sensor;
63: a vertical baffle; 64, 65: a horizontal baffle.
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.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
The air conditioner 1 shown in fig. 1 includes: the indoor unit 3 is exemplified by an indoor unit (shown in the figure), and the indoor unit is usually mounted on an indoor wall surface WL or the like. For another example, an indoor cabinet (not shown) is also an indoor unit of the indoor unit.
The outdoor unit 2 is generally installed outdoors and used for heat exchange in an indoor environment. In the illustration of fig. 1, the outdoor unit 2 is indicated by a broken line because the outdoor unit 2 is located outdoors on the opposite side of the indoor unit 3 with respect to the wall surface WL.
Fig. 2 shows a circuit configuration of an air conditioner 1, and the air conditioner 1 includes a refrigerant circuit 10, and is capable of executing a vapor compression refrigeration cycle by circulating a refrigerant in the refrigerant circuit 10. The indoor unit 3 and the outdoor unit 2 are connected by a connecting pipe 4 to form a refrigerant circuit 10 in which a refrigerant circulates.
Further, as shown in fig. 3, the air conditioner 1 is provided with a control unit 50 for controlling the operation of each component in the air conditioner inside so that each component of the air conditioner 1 operates to realize each predetermined function of the air conditioner. The air conditioner 1 is further provided with a remote controller 5, and the remote controller 5 has a function of communicating with the control unit 50 using, for example, infrared rays or other communication methods. The remote controller 5 is used for various controls of the air conditioner by a user, and interaction between the user and the air conditioner is realized.
As described in the background art, although the motor of the built-in driving unit in the prior art is simple to control, and only needs to continuously adjust the duty ratio to realize the control of the rotating speed, the cost is high, the efficiency is low, meanwhile, the built-in driving unit cannot reflect the real-time state of the fan motor in real time, and when the indoor motor fails, which failure is not known, and as the air conditioner is more and more intelligent, the driving circuit of the built-in driving unit cannot meet the intelligent requirements for filter screen detection, electric quantity detection and the like.
For solving the above problem, this application embodiment provides a drive circuit, through setting up first communication unit, second communication unit, third communication unit and fourth communication unit, will drive unit is external, and based on the communication unit goes on main control unit with data interaction between the drive unit can be in real time with main control unit's control signal or drive unit's feedback signal transmits, has reduced manufacturing cost to can the real-time status of the fan motor of real-time supervision drive unit control.
Fig. 4 is a schematic structural diagram of a driving circuit according to an embodiment of the present invention, the driving circuit includes a main control unit 101, a driving unit 102, a first communication unit 103, a second communication unit 104, a third communication unit 105, and a fourth communication unit 106,
the first communication unit 103 is connected to the first output interface of the main control unit 101 and the first input interface of the driving unit 102 through a first resistor R1, the second communication unit 104 is connected to the second output interface of the main control unit 101 and the second input interface of the driving unit 102 through a second resistor R2, the third communication unit 105 is connected to the second input interface of the main control unit 101 and the second output interface of the driving unit 102 through a third resistor R3, the fourth communication unit 106 is connected to the first input interface of the main control unit 101 and the first output interface of the driving unit 102 through a fourth resistor R4,
the first communication unit 103 is configured to send a first control signal of the main control unit 101 to the driving unit 102;
the second communication unit 104 is configured to send a second control signal of the main control unit 101 to the driving unit 102;
the third communication unit 105 is configured to send a second feedback signal of the driving unit 102 corresponding to the second control signal to the main control unit 101;
the fourth communication unit 106 is configured to send a first feedback signal of the driving unit 102 corresponding to the first control signal to the main control unit 101;
the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are detachable elements.
Specifically, the main control unit 101 is configured to send a control command to the driving unit 102 and receive a feedback signal sent by the driving unit, and the driving unit 102 is configured to receive the control command of the main control unit 101 and return the feedback signal to the main control unit 101.
The first communication unit, the second communication unit, the third communication unit and the fourth communication unit form two groups of communication loops, the first group of communication loops are the first communication unit and the fourth communication unit, the second resistor R2 and the third resistor R3 are removed at the moment, the second group of communication loops are the second communication unit and the third communication unit, and the first resistor R1 and the fourth resistor R4 are removed at the moment.
Specifically, when the main control unit 101 and the driving unit 102 perform signal interaction through a first set of communication loops, the first control signal is a speed control VSP interface signal, the first feedback signal is a signal received by a feedback output FG interface of the main control unit 101, and the first control signal is mainly an inquiry command of the real-time rotation speed of the fan motor sent by the main control unit 101 to the driving unit 102. The first feedback signal is the real-time rotation speed of the fan motor returned by the driving unit 102 to the main control unit 101.
When the main control unit 101 and the driving unit 102 perform signal interaction through a second group of communication loops, the first control signal is a received data RXD interface signal, the first feedback signal is a signal received by a transmitted data TXD interface of the main control unit 101, and the first control signal is mainly a control command transmitted by the main control unit 101 to the driving unit 102. The first feedback signal is status information of the fan motor returned by the driving unit 102 to the main control unit 101.
In order to realize the signal interaction between the main control unit 101 and the driving unit 102, in the preferred embodiment of the present application, as shown in fig. 5, the first communication unit includes a first capacitor C1, a first resistor R1, a fifth resistor R5 and a second capacitor C2, the fourth communication unit includes a transistor Q1, a fourth resistor R4, a sixth resistor R6, a seventh resistor R7 and a fourth capacitor C4,
a common junction point of a first end of the first capacitor C1 and a first end of the first resistor R1 is connected to the first output interface of the main control unit 101, a second end of the first capacitor C1, a second end of the fifth resistor R5 and a second end of the second capacitor C2 are all grounded, a common junction point of a second end of the first resistor R1, a first end of the fifth resistor R5 and a first end of the second capacitor C2 is connected to the first input interface of the driving unit 102,
a first end of the fourth resistor R4 is connected to the first input port of the main control unit 101, a second end of the fourth resistor R4 is connected to a collector of the transistor Q1, a common node between an emitter of the transistor Q1, a first end of a seventh resistor R7, and a second end of the fourth capacitor C4 is grounded, a common node between a base of the transistor and a second end of the seventh resistor R7 is connected to a first end of the sixth resistor R6, and a common node between a second end of the sixth resistor R6 and a first end of the fourth capacitor C4 is connected to the first output interface of the driving unit 102;
the first capacitor C1 is specifically an electrolytic capacitor.
It should be noted that the above solution of the preferred embodiment is only one specific implementation solution proposed in the present application, and those skilled in the art can select other communication unit structures according to the actual situation, which does not affect the protection scope of the present application.
In order to realize the information interaction between the main control unit 101 and the driving unit 102, in the preferred embodiment of the present application, as shown in fig. 5, the second communication unit 104 includes a second resistor R2 and a third capacitor C3, the third communication unit 105 includes a third resistor R3 and a fifth capacitor C5,
a first end of the second resistor R2 is connected to the second output interface of the main control unit 101, a common node between a second end of the second resistor R2 and a first end of the third capacitor C3 is connected to the second input interface of the driving unit 102, a second end of the third capacitor C3 is grounded,
a first end of the third resistor R3 is connected to the second input interface of the main control unit 101, a common node between a second end of the third resistor R3 and a first end of the fifth capacitor C5 is connected to the second output interface of the driving unit 102, and a second end of the fifth capacitor C5 is grounded.
It should be noted that the above solution of the preferred embodiment is only one specific implementation solution proposed in the present application, and those skilled in the art may select other communication circuit structures according to the actual situation, which does not affect the protection scope of the present application.
In order to realize the power supply and control of the main control unit 101 to the driving unit 102, in the preferred embodiment of the present application, as shown in fig. 4, the driving circuit further includes a dc voltage VDC, a dc voltage 15V and a dc ground GND,
the dc voltage VDC, the dc voltage 15V, the dc ground GND, the first communication unit 103, the second communication unit 104, the third communication unit 105, and the fourth communication unit 106 are integrated in the five-core VH socket.
In order to implement the data transmission between the main control unit 101 and the driving unit 102, in a preferred embodiment of the present application, as shown in fig. 4, the first output interface of the main control unit 101 is specifically a VSP interface, the first input interface of the driving unit 102 is specifically a P1.6 interface, the first input interface of the main control unit 101 is specifically an FG interface, the first output interface of the driving unit 102 is specifically a P0.5 interface, the second output interface of the main control unit 101 is specifically an RXD interface, the second input interface and the second output interface of the driving unit 102 are specifically P0.6 interfaces, and the second input interface of the main control unit 101 is specifically a TXD interface.
It should be noted that the above solution of the preferred embodiment is only one specific implementation solution proposed in the present application, and those skilled in the art may select other port types according to practical situations, which does not affect the protection scope of the present application.
The operation principle of the driving circuit in the embodiment of the present application is described below with reference to fig. 5:
as shown in fig. 4, the driving circuit mainly includes a main control unit 101, a driving unit 102, a first communication unit 103, a second communication unit 104, a third communication unit 105 and a fourth communication unit 106, the driving unit 102 is disposed on an indoor main control board, the connection between the main control unit 101 and the driving unit 102 is realized through pins, the height of the driving unit 102 from the indoor main control board PCB is 12mm, the minimum gap is 6mm, the driving unit 102 is fixed by three two-bit pins fixed to a five-core VH socket, the three two-bit pins are only used for fixing the driving unit 102, the five-core VH socket mainly realizes the power supply and control of the driving unit 102 by the main control unit 101 except for the supporting and fixing functions, and the port of the five-core VH socket includes two paths of a dc voltage VDC, a dc 15V, a dc ground GND and a communication loop, the two-way communication loop is specifically realized by the first communication unit 103, the second communication unit 104, the third communication unit 105, and the fourth communication unit 106.
The first communication loop is composed of a first communication unit 103 and a fourth communication unit 106, at this time, the second resistor R2 and the third resistor R3 are removed, the first resistor R1 and the fourth resistor R4 are reserved, at this time, the main control unit 101 sends a control signal to the drive unit 102 through a VSP interface, the drive unit 102 receives the control signal sent by the main control unit 101 through the P1.6 interface, generates a feedback signal according to the control signal, and sends the feedback signal back to the main control unit 101 through P0.5, the FG interface of the main control unit 101 receives the feedback signal, specifically, when the first communication loop is selected, the control signal sent by the main control unit 101 is mainly an inquiry signal for the real-time rotation speed of the fan motor, and after the drive unit 102 receives the inquiry signal, the real-time rotation speed of the fan motor at this time is determined, and a feedback signal is generated based on the real-time rotating speed and sent back to the main control unit 101, so that the real-time rotating speed of the fan motor can be inquired.
The second communication loop is composed of a second communication unit 104 and a third communication unit 105, at this time, the first resistor R1 and the fourth resistor R4 are removed, the second resistor R2 and the third resistor R3 are reserved, at this time, the main control unit 101 sends a control signal to the driving unit 102 through an RXD interface, the driving unit 102 receives the control signal sent by the main control unit 101 through the P0.6 interface, generates a feedback signal according to the control signal, and sends the feedback signal back to the main control unit 101 through P0.6, the TXD interface of the main control unit 101 receives the feedback signal, specifically, when the second communication loop is selected, the RXD interface is used for sending the control signal to the driving unit 102, the control signal includes but is not limited to adjustment of the rotation speed of the fan motor, query of state information of the fan motor, and the like, after the driving unit 102 receives the control signal through P0.6, and sending real-time rotating speed, motor current signals, direct current voltage, power module temperature, fault codes, dirty and blocked signals and the like to the main control unit 101.
When the driving unit 102 fails, failure information is sent to the main control unit 101, where the failure information includes: the system comprises a drive unit 102, a main control unit 101, a fault alarm device LED indicator lamp on the drive unit 102, a fan motor, an LED indicator lamp, a phase-loss protection, an overvoltage protection, an undervoltage protection, a motor stalling, an overcurrent protection, an overtemperature protection and the like, wherein the drive unit 102 triggers any one of the above protections to shut down and transmit a fault information code to the main control unit 101, the main control unit 101 transmits the fault to a display device, the fault code is convenient to know, after a fault signal is transmitted to the main control unit 101, a fault alarm is given out through a fault alarm device LED indicator lamp on the drive unit 102, when the above protections occur, the fan motor stops, the LED indicator lamp quickly flashes (0.3 second is on and 0.3 second is off) to represent the content of the protection, and after the flash is performed for k times, the LED indicator.
In a preferred embodiment of the present application, the driving unit 102 mainly includes a micro control unit MCU and a peripheral circuit module, an intelligent power IPM circuit module and a communication circuit module, where the communication circuit module is connected to the MCU and the peripheral circuit module to receive and transmit signals from and to the driving unit.
The micro control unit MCU and the peripheral circuit module comprise a sampling module, a driving signal generating module, a current calculating module and a control module, wherein the current calculating module, the control module and the driving signal module are integrated in the micro control unit MCU.
The drive signal generation module is used for calculating and generating PWM drive signals and drive current values according to input signals such as rotating speed signals and current signals and outputting the signals to the IPM circuit module.
The control module is used for acquiring rotating speed position information according to the sampled current value and acquiring a driving voltage value according to the rotating speed position information and the rotating speed value, and the control module estimates the actual rotating speed according to the sampled current value.
Through using above technical scheme, through setting up first communication unit, second communication unit, third communication unit and fourth communication unit, will the drive unit is external, and based on the communication unit goes on main control unit with data interaction between the drive unit can be in real time with main control unit's control signal or drive unit's feedback signal transmits, has reduced manufacturing cost to can real-time supervision drive unit control's fan motor's real-time status.
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 (6)

1. A driving circuit is characterized in that the driving circuit comprises a main control unit, a driving unit, a first communication unit, a second communication unit, a third communication unit and a fourth communication unit,
the first communication unit is connected with the first output interface of the main control unit and the first input interface of the driving unit through a first resistor, the second communication unit is connected with the second output interface of the main control unit and the second input interface of the driving unit through a second resistor, the third communication unit is connected with the second input interface of the main control unit and the second output interface of the driving unit through a third resistor, and the fourth communication unit is connected with the first input interface of the main control unit and the first output interface of the driving unit through a fourth resistor,
the first communication unit is used for sending a first control signal of the main control unit to the driving unit;
the second communication unit is used for sending a second control signal of the main control unit to the driving unit;
the third communication unit is used for sending a second feedback signal of the driving unit corresponding to the second control signal to the main control unit;
the fourth communication unit is used for sending a first feedback signal of the driving unit corresponding to the first control signal to the main control unit;
the first resistor, the second resistor, the third resistor and the fourth resistor are detachable elements.
2. The driving circuit of claim 1, wherein the first communication unit comprises a first capacitor, a first resistor, a fifth resistor and a second capacitor, the fourth communication unit comprises a transistor, a fourth resistor, a sixth resistor, a seventh resistor and a fourth capacitor,
the common junction point of the first end of the first capacitor and the first end of the first resistor is connected with the first output interface of the main control unit, the second end of the first capacitor, the second end of the fifth resistor and the second end of the second capacitor are all grounded, the common junction point of the second end of the first resistor, the first end of the fifth resistor and the first end of the second capacitor is connected with the first input interface of the driving unit,
the first end of the fourth resistor is connected with the first input port of the main control unit, the second end of the fourth resistor is connected with the collector of the triode, the common junction of the emitter of the triode, the first end of the seventh resistor and the second end of the fourth capacitor is grounded, the common junction of the base of the triode and the second end of the seventh resistor is connected with the first end of the sixth resistor, and the common junction of the second end of the sixth resistor and the first end of the fourth capacitor is connected with the first output interface of the driving unit;
wherein the first capacitor is specifically an electrolytic capacitor.
3. The driving circuit of claim 1, wherein the second communication unit includes a second resistor and a third capacitor, the third communication unit includes a third resistor and a fifth capacitor,
the first end of the second resistor is connected with the second output interface of the main control unit, the common joint point of the second end of the second resistor and the first end of the third capacitor is connected with the second input interface of the driving unit, the second end of the third capacitor is grounded,
the first end of the third resistor is connected with the second input interface of the main control unit, the common joint of the second end of the third resistor and the first end of the fifth capacitor is connected with the second output interface of the driving unit, and the second end of the fifth capacitor is grounded.
4. The driving circuit according to claim 1, wherein the driving circuit further comprises a DC voltage VDC, a DC voltage 15V and a DC ground GND,
the direct-current voltage VDC, the direct current 15V, the direct-current grounding end GND, the first communication unit, the second communication unit, the third communication unit and the fourth communication unit are integrated in the five-core VH socket.
5. The driving circuit according to claim 1, wherein the first output interface of the master control unit is specifically a speed control VSP interface, the first input interface of the driving unit is specifically a P1.6 interface, the first input interface of the master control unit is specifically a feedback output FG interface, the first output interface of the driving unit is specifically a P0.5 interface, the second output interface of the master control unit is specifically a receive data RXD interface, the second input interface and the second output interface of the driving unit are specifically P0.6 interfaces, and the second input interface of the master control unit is specifically a transmit data TXD interface.
6. An air conditioner characterized by comprising the drive circuit according to any one of claims 1 to 5, and 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;
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;
an indoor environment temperature sensor for detecting an indoor environment temperature;
and the indoor coil temperature sensor is used for detecting the temperature of the indoor coil.
CN202010443397.7A 2020-05-22 2020-05-22 Driving circuit and air conditioner Active CN111912085B (en)

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Address after: No.1, Hisense Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province 266700

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