CN114566956B - Zero-live wire adjusting circuit and method and air conditioner - Google Patents
Zero-live wire adjusting circuit and method and air conditioner Download PDFInfo
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- CN114566956B CN114566956B CN202210220709.7A CN202210220709A CN114566956B CN 114566956 B CN114566956 B CN 114566956B CN 202210220709 A CN202210220709 A CN 202210220709A CN 114566956 B CN114566956 B CN 114566956B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/004—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of incorrect phase sequence; with switching for obtaining correct phase sequence
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
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Abstract
The application relates to a zero-live wire alignment circuit, a zero-live wire alignment method and an air conditioner, wherein the zero-live wire alignment circuit is provided with a control module, a current detection module and a switch alignment module, and detects the current direction on a live wire or a zero wire in a preset air conditioner power-on stage through the current detection module, and the current direction is used for identifying whether the line sequences of two phase lines coupled with an internal unit and an external unit are corresponding or not; the switch adjusting module is used for controlling the on-off of the two phase lines of the inner machine and the outer machine and adjusting the line sequence of the connection of the two phase lines, and the switch adjusting module is used for adjusting the line sequence of the connection of the two phase lines when the control module identifies that the line sequences of the two phase lines coupled with the inner machine and the outer machine are not corresponding according to the current direction. Through this application, solve the zero live wire of air conditioner among the correlation technique and connect the manual work again and just the wiring after turning over, the problem that installation effectiveness is low, dangerous high has realized that the installation of the zero live wire of air conditioner need not distinguish, reduces the installation degree of difficulty, improves air conditioner installation effectiveness.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a zero-fire line adjusting circuit and method and an air conditioner.
Background
In the related technology, an indoor unit and an outdoor unit of an air conditioner communicate by adopting a three-wire system, and a connecting wire between the indoor unit and the outdoor unit comprises a zero wire, a live wire and a communication wire, so that half-duplex asynchronous serial port communication is formed.
In the related art, the outdoor unit is powered by the indoor unit, however, zero line and live line of the outdoor unit are reversely connected in the installation process, when the zero line and the live line are reversely connected, a communication circuit between the outdoor unit and the indoor unit cannot form a current loop, so that a communication fault is caused, an air conditioner cannot be normally started, at the moment, the fault needs to be checked, the positions of the zero line and the live line need to be manually changed, the installation efficiency is limited, high-altitude operation is required during reinstallation, and the operation risk of an installer is increased. The installation of the zero line and the live line of the air conditioner outdoor unit needs to be distinguished, and certain requirements are required for the professional of installation personnel; meanwhile, in the related art, the present invention is applied to an alignment circuit of an indoor unit and an outdoor unit of an air conditioner, for example: the zero-live line communication automatic adjusting circuit and the control method thereof have certain leakage current and electrical risks.
Aiming at the problems that the wiring needs to be manually adjusted again after the zero line and the live line of the air conditioner are reversely connected in the prior art, the installation efficiency is low, and the danger is high, an effective solution is not provided.
Disclosure of Invention
The application provides a zero and live wire alignment circuit and method of a zero and live wire and an air conditioner, and aims to solve the problems that in the related art, manual alignment wiring needs to be performed again after the zero and live wire of the air conditioner is reversely connected, the installation efficiency is low, and the danger is high.
In a first aspect, the application provides a zero-live wire alignment circuit, which is used for aligning zero-live wires of an inner unit and an outer unit of an air conditioner, and comprises a control module, a current detection module and a switch alignment module, wherein the current detection module comprises a sampling port and a feedback port, the feedback port is electrically connected with the control module, and the sampling port is electrically connected with a first phase wire of two phase wires which are used for coupling the inner unit and the outer unit and are connected with the switch alignment module and the outer unit; the current detection module is used for detecting the current direction on the first phase line in a preset power-on stage of the air conditioner, wherein the current direction is used for identifying whether the sequence of two phase lines coupling the internal unit and the external unit is corresponding or not; the switch alignment module is also electrically connected with the control module and the municipal power grid and is used for controlling the on-off of two phase lines coupling the inner machine and the outer machine and aligning the line sequence of the connection of the two phase lines; and the control module is used for controlling the switch alignment module to align the line sequence of the two corresponding phase lines when the control module identifies that the line sequences of the two phase lines coupled with the internal machine and the external machine do not correspond to each other according to the current direction.
In a second aspect, the present application provides a method for aligning a null line, including the circuit for aligning a null line according to the first aspect, the method including: after the air conditioner is powered on and started, the control module controls the switch alignment module to communicate two phase lines of the internal unit and the external unit, so that the internal unit supplies power to the external unit; in a preset air conditioner power-on stage, the control module controls the current detection module to detect a current direction on the first phase line, wherein the current direction is used for identifying whether line sequences of two phase lines coupled with the internal unit and the external unit correspond to each other; the control module identifies whether the line sequences of the two phase lines coupled with the inner machine and the outer machine correspond to each other according to the current direction; and when recognizing that the line sequences of the two phase lines coupled with the internal machine and the external machine do not correspond, the control module controls the switch alignment module to align the line sequences of the two phase lines connected correspondingly.
In a third aspect, an air conditioner is provided, which includes an internal unit, an external unit, and a tuning circuit for tuning the zero-live line reverse connection of the internal unit and the external unit, wherein the tuning circuit is the tuning circuit for the zero-live line of the first aspect.
Compared with the related art, the embodiment provides the aligning circuit, the method and the air conditioner of the zero and live wire, the aligning circuit of the zero and live wire is provided with the control module, the current detection module and the switch aligning module, and detects the current direction on the live wire or the zero wire in the preset power-on stage of the air conditioner through the current detection module, wherein the current direction is used for identifying whether the line sequences of two phase lines coupled with the internal unit and the external unit are corresponding or not; the on-off of two way phase lines of controlling interior machine and outer machine through the switch alignment module and the line preface of two way phase line connections that the alignment corresponds and through control module when discerning the line preface of two way phase lines that are coupled interior machine and outer machine not corresponding according to the current direction, the control switch alignment module adjusts the line preface of two way phase line connections that correspond, solve the zero fire line of air conditioner among the correlation technique and connect the wiring of will artifical alignment again after turning over, the installation effectiveness is low, dangerous high problem, the installation that has realized the zero live wire of air conditioner need not distinguish, reduce the installation degree of difficulty, improve the air conditioner installation effectiveness, eliminate the beneficial effect that the zero live wire connects the electric risk that the contrary causes.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a logic block diagram of a zeroline and firewire adjusting circuit provided in an embodiment of the present application;
fig. 2 is a topology diagram of a zeroline and firewire adjusting circuit provided in an embodiment of the present application;
FIG. 3 is a topology diagram of a leveling circuit of the preferred embodiment of the present application;
fig. 4 is a first equivalent circuit diagram of connection between an inner unit and an outer unit in the present application;
fig. 5 is an equivalent circuit diagram ii of the connection between the inner unit and the outer unit in the present application;
FIG. 6 is a first graph of current versus time for the corresponding machine in the present application;
FIG. 7 is a second graph of current versus time for the corresponding machine in the present application;
FIG. 8 is a third graph of current versus time for the corresponding machine of the present application;
fig. 9 is a schematic view illustrating a system structure of an outdoor unit according to a preferred embodiment of the present application;
fig. 10 is a schematic view of the system configuration of the internal machine of the preferred embodiment of the present application;
fig. 11 is a flow chart of an alignment method according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Fig. 1 is a logic block diagram of a zero-live wire alignment circuit provided by the embodiment of the present application, fig. 2 is a topological diagram of a zero-live wire alignment circuit provided by the embodiment of the present application, and fig. 1 to 2 show a zero-live wire alignment circuit, which is used for the discrimination of an internal machine and an external machine zero-live wire sequence in the installation process of an air conditioner and the alignment of a zero-live wire sequence after reverse connection of the zero-live wire, so that the installation of the zero-live wire does not need to be distinguished, the installation difficulty is reduced, the installation efficiency of the air conditioner is improved, and the beneficial effect of electrical risk caused by reverse connection of the zero-live wire is eliminated.
Referring to fig. 1 to 2, the zeroline and live-line adjusting circuit provided in the embodiment of the present invention includes a control module 100, a current detection module 200, and a switch adjusting module 300, wherein,
the outer machine of the air conditioner is provided with a commercial power supply by the inner machine, the commercial power supply is connected with the inner machine so as to at least enable the inner machine to be electrified and operated, and when the line sequence of two phase lines coupling the inner machine and the outer machine does not correspond to each other (the zero line of the inner machine is connected with the live line of the outer machine, and the live line of the inner machine is connected with the zero line of the outer machine), the inner machine can also maintain to supply power to the outer machine, but cannot be communicated with the outer machine, and the air conditioner cannot be started normally.
The control module 100 corresponds to a micro control unit MCU of an internal unit, and performs identification of the line sequence of two phase lines (zero line and live line) and alignment of the line sequence of the reversely connected zero line and live line through the internal unit.
The current detection module 200 comprises a sampling port and a feedback port, wherein the feedback port is electrically connected with the control module, and the sampling port is electrically connected with a first phase line in two phase lines which are used for coupling the internal unit and the external unit and are connected with the switch alignment module 300 and the external unit; the current detection module 200 is configured to detect a current direction on the first phase line in a preset power-on phase of the air conditioner, where the current direction is used to identify whether the sequence of the two phase lines coupled to the internal unit and the external unit corresponds to each other.
In this embodiment, the inner unit monitors the operation condition of the outer unit by arranging a current detection module; in the present embodiment, the current detection module 200 includes, but is not limited to, corresponding detection sensors, such as: the current detection sensor, the current detection module 200, can detect the current direction with reference to the detection of the current in the related art, which is not limited in this application.
In this embodiment, the first phase line is set as the hot line; the preset air conditioner power-on stage at least includes: after the air conditioner outdoor unit is electrified to start a switching power supply of the outdoor unit, the voltage value provided by the switching power supply reaches the time of a standard design voltage value; in this embodiment, the preset time corresponding to the power-on phase of the air conditioner is the time for completing the line sequence identification and the alignment in this embodiment of the present application; the zero-live line adjustment of the embodiment of the application is set to be performed only once after the air conditioner is powered on and started.
For the internal machine and the external machine, after the commercial power supply is connected, strong electric filtering processing is carried out through a protection circuit and a filter circuit, then full-wave rectification is carried out through a rectifier bridge, and filtering is carried out through a high-capacity capacitor to form stable direct current, and different voltage sources (direct current, for example, a direct current power supply is provided for an MCU (microprogrammed control unit) of corresponding equipment are provided for the internal machine or the external machine of the air conditioner through corresponding switch power supplies; because of the existence of the large-capacity capacitor, the large-capacity capacitor needs to be charged after the external unit is electrified, a certain time is needed from the electrification of the external unit to the normal and stable operation of the switching power supply of the external unit and the supply of the normal direct-current voltage for the external unit, and the time can be set as the time corresponding to the preset electrification stage of the air conditioner.
The switch alignment module 300 is further electrically connected to the control module 100 and the utility grid, and is configured to control on/off of two phase lines coupled to the internal unit and the external unit and align a line sequence of two phase lines connected to the corresponding phase lines.
In this embodiment, the switch alignment module 300 is disposed on two phase lines for providing the commercial power to the external unit from the internal unit, that is, the commercial power flows to the external unit after passing through the internal unit, and when the connection is completed and the power is turned on, the commercial power supplies power to the internal unit first, and the power is converted by a corresponding circuit inside the internal unit to supply power to the MCU of the internal unit and the peripheral control circuit thereof.
In this embodiment, the switch adjusting module 300 controls the on/off of the two corresponding phase lines to include two states: one is to control the two phase lines coupled with the inner machine and the outer machine to correspond to each other in line sequence, namely, the zero line of the inner machine is coupled with the zero line of the outer machine, and the live line of the inner machine is coupled with the live line of the outer machine; the other is to control the line sequence of two phase lines coupling the inner machine and the outer machine to correspond, namely the zero line of the inner machine is coupled with the live line of the outer machine, and the live line of the inner machine is coupled with the zero line of the outer machine; in this embodiment, the line sequence is adjusted in the starting process after the connection between the internal unit and the external unit of the air conditioner, so that the switch adjusting module 300 does not control the on/off of the two phase lines to maintain the two phase lines coupled between the internal unit and the external unit for a long time or disconnect the two phase lines for a period of time; in this embodiment, the switch aligning module 300 only disconnects the two phase lines during the switching process, and during the switching process, the power supply to the external unit is not continuous, and it should be understood that, although during the switching process between the two states, the switch aligning module 300 may disconnect the end corresponding to the external unit and the end corresponding to the internal unit for a short time, because of the large-capacity capacitor in the external unit, the disconnection during the switching process does not cause the power failure of the external unit, and the external unit maintains the power supply state after the air conditioner is powered on.
And the control module 100 is configured to control the switch alignment module 300 to align the line sequence of the two phase lines connected to the corresponding internal unit and the external unit when it is identified that the line sequence of the two phase lines coupled to the internal unit and the external unit is not corresponding according to the current direction.
In this embodiment, the current direction represents whether the line sequences of the two phase lines coupled with the inner unit and the outer unit are in one-to-one correspondence, and when the line sequences of the two phase lines of the inner unit and the outer unit are in one-to-one correspondence, that is, the live line of the inner unit is consistent with the live line of the outer unit, and the zero line of the inner unit is consistent with the zero line of the outer unit, at this moment, the current detection module 200 can detect that the current direction is consistent with the preset current direction, otherwise, the current direction is opposite, and therefore, whether the line sequences of the two phase lines coupled with the inner unit and the outer unit are corresponding can be rapidly identified through the direction of the detection current.
In this embodiment, the line sequence of the phase line connected between the internal unit and the utility grid is fixed, that is, the line sequence of the internal unit and the utility grid is one-to-one, in this application, the non-correspondence of the line sequence or the reverse connection of the zero line refers to the non-correspondence of the two phase lines connected between the internal unit and the external unit, that is, the line sequence of the two phase lines coupled between the internal unit and the external unit is non-corresponding, specifically, the zero line of the internal unit corresponds to the zero line of the external unit, and the zero line of the internal unit corresponds to the live line of the external unit, therefore, the control module 100 controls the switch alignment module 300 to align the line sequence of the two phase lines, that is, the line sequence of the zero line of the internal unit and the zero line of the external unit is aligned to the live line of the external unit, and the zero line of the internal unit corresponds to the live line of the external unit, and after the alignment is completed, the line sequence of the zero line of the internal unit and the external unit of the air conditioner is fixed, and the air conditioner can be normally started subsequently.
Fig. 3 is a topological diagram of a rectification circuit according to a preferred embodiment of the present application, and referring to fig. 1 to 3, in order to implement a check on a current direction, so as to determine whether the sequence of two phase lines coupling an internal unit and an external unit corresponds, in some embodiments, the first phase line is further connected in series with a first diode D1, an anode of the first diode D1 is electrically connected to a switch rectification module 300, and a cathode of the first diode D1 is electrically connected to the external unit, wherein the first diode D1 is used for cooperating with a current detection module 200 to detect a current direction on the first phase line.
In this embodiment, the difference of the zero-live wire wiring sequence between the inner unit and the outer unit of the air conditioner causes the current direction detected by the current detection module 200 to be different, for example: when the zero line of the inner unit is in butt joint with the live wire and the zero line of the outer unit is in butt joint with the live wire, the detected current direction corresponds to the direction from the inner unit to the outer unit, and when the zero line of the inner unit is connected with the live wire of the outer unit and the live wire of the inner unit is connected with the zero line of the outer unit, the current direction is expressed as the direction from the outer unit to the inner unit; in this embodiment, the indoor set of air conditioner adopts zero line and communication line to constitute the indoor set of air conditioner and the communication return circuit of outer machine with outer machine, consequently, adopts live wire L as first phase line, through establishing ties first diode D1 on first phase line, sets up being connected of first diode D1 and switch alignment module 300 and outer machine: when the first diode D1 is in one-way conduction, the first phase line is correspondingly coupled with the live wire of the inner machine, two phase lines coupled with the inner machine and the outer machine are in one-to-one correspondence, specifically, the live wire of the inner machine is connected with the live wire of the outer machine, and the zero line of the inner machine is connected with the zero line of the outer machine; in this embodiment, the sampling point of the current detection module 200 is connected to the anode of the first diode D1, and when the sequences of the two corresponding phase lines correspond to each other, the first phase line is correspondingly coupled to the live line of the internal machine, at this time, the first diode D1 is turned on in a single direction, and the current detection module 200 can collect current in a preset period; and the current cannot be collected in the preset period, if the phase line corresponding to the first phase line in the two phase lines of the internal machine connected to the utility grid and the first phase line belong to different phase lines, for example: first phase line corresponds and is coupled the zero line of interior machine, when current detection module 200 can not detect corresponding electric current or current direction and preset direction and not correspond, then first phase line is the zero line, this moment, first diode D1 does not switch on, it does not match to correspond the line sequence that shows two way phase lines that correspond, the live wire of interior machine is connected with the zero line of outer machine, the zero line of interior machine is connected with the live wire of outer machine, at this moment, although the interior machine maintains and exports mains supply to outer machine, but interior machine and outer machine can't pass, the unable normal start of air conditioner.
It should be noted that, in some embodiments, the detection of the current direction may also be performed based on the independent operation of the current detection module 200, but the detection of the current direction can be rapidly and effectively performed by connecting the first diode D1 in series to the first phase line, so as to identify the sequence of the two phase lines coupling the internal unit and the external unit.
Fig. 4 is a first equivalent circuit diagram of the connection between the internal unit and the external unit in the present application, fig. 5 is a second equivalent circuit diagram of the connection between the internal unit and the external unit in the present application, fig. 6 is a first graph of the corresponding current and time of the external unit in the present application, fig. 7 is a second graph of the corresponding current and time of the external unit in the present application, fig. 8 is a third graph of the corresponding current and time of the external unit in the present application, and referring to fig. 1 to 8, in some optional embodiments, the relationship between the current direction and the connection sequence of two phase lines coupled to the internal unit and the external unit is as follows: two phase lines (live line and zero line) of an inner machine are connected with an AB end through a relay to provide alternating current for the outer machine, and because a first diode D1 connected in series with the live line (or the zero line) of the outer machine has unidirectional conductivity, the current directions of the A port on the line are different due to the difference of the connection modes of the live line and the zero line of the outer machine, which is shown in a reference figure 6-8, wherein the current direction shown in a figure 6 corresponds to an equivalent circuit diagram shown in a figure 4, and the current direction shown in a figure 7 corresponds to an equivalent circuit diagram shown in a figure 5; when the first diode D1 is closed, the corresponding current direction curve is shown in fig. 8.
In order to reduce the power consumption after completing the line sequence detection, referring to fig. 3, in some embodiments, the alignment circuit further includes a short-circuit switch module 400 connected in parallel with the first diode D1, the short-circuit switch module 400 is further coupled to a dc power supply unit of the external unit (corresponding to a switching power supply integrated on the external unit, and different dc voltage sources for providing circuits around the external unit by the corresponding switching power supply), wherein the short-circuit switch module 400 is configured to short-circuit the first diode D1 after the air conditioner is powered on.
In this embodiment, the unidirectional conductivity of the first diode D1 on the first phase line may result in a reduction of 50% in the electric energy utilization rate, and the line sequence detection and identification of the zero-live line is only once identified after power-on, so the first diode D1 in the external unit is short-circuited after the power-on for a period of time, and then the power supply to the external unit is performed in a lossless power supply mode, that is, the corresponding phase line is directly connected.
In this embodiment, the linear recognition and the adjustment need to be completed before the first diode D1 is short-circuited, that is, the preset air conditioner power-on stage set in this embodiment is a corresponding time from power-on of the internal unit of the air conditioner to short-circuiting of the first diode D1.
In this embodiment, after the first secondary transistor D1 is short-circuited, the current is a normal alternating current, and a corresponding current curve graph can be referred to as shown in fig. 7; in this embodiment, by adding the short-circuit switch module 400, the first diode D1 is controlled to be short-circuited or unidirectionally conducted at different time intervals, so that the internal unit can normally complete the detection of the line sequence and normally supply power after completing the line sequence adjustment, thereby reducing the power loss caused by the unidirectional conduction of the first diode D1.
Fig. 9 is a schematic diagram of a system structure of an external unit according to a preferred embodiment of the present application, in order to implement short-circuit control of the first diode D1, in some embodiments, referring to fig. 9, the short-circuit switch module 400 includes a first driving unit 41 and a first controlled switch 42, an input terminal of the first driving unit 41 is electrically connected to the dc power supply unit, an output terminal of the first driving unit 41 is electrically connected to a control terminal of the first controlled switch 42, an input terminal of the first controlled switch 42 is electrically connected to an anode of the first diode D1, an output terminal of the first controlled switch 42 is electrically connected to a cathode of the first diode D1, wherein,
and the direct current power supply unit is used for outputting a first voltage after the outdoor unit is electrified for a preset time.
In this embodiment, after the two phase lines of the external unit are connected to the two phase lines of the internal unit, the commercial power provided by the internal unit to the external unit is subjected to full-wave rectification through a protection circuit and a filter circuit (strong electric filtering) and a rectifier bridge, and then is filtered by a large-capacity electrolytic capacitor (Cc) to form stable direct current, and then is subjected to a switching power supply to provide different voltage sources (VCC) for the external unit of the air conditioner; in this embodiment, the preset time length for powering on the external unit refers to a time period from when the internal unit outputs the commercial power supply to the external unit until the switching power supply normally and stably operates to output the dc power supply VCC.
The first driving unit 41 is configured to generate a first driving signal after receiving the first voltage.
In this embodiment, the first driving unit 41 correspondingly converts the received first voltage into a driving signal for driving the first controlled switch 42 to control the on/off of the input terminal and the output terminal thereof, so as to short-circuit the first diode D1.
The first controlled switch 42 is configured to control an input end of the first controlled switch 42 to communicate with an output end when receiving the first driving signal, so as to short-circuit the first diode D1.
In some embodiments, referring to fig. 8, the first driving unit 41 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first switching tube Q1, a first end of the first resistor R1 is electrically connected to a first end of the fourth resistor R4 and an input end of the first driving unit 41, a second end of the first resistor R1 is electrically connected to a first end of the second resistor R2 and a first end of the third resistor R3, a second end of the second resistor R2 is grounded, a second end of the third resistor R3 is electrically connected to a control end of the first switching tube Q1, a second end of the fourth resistor R4 is electrically connected to the first controlled switch 42, in this embodiment, a fourth port corresponding to the first controlled switch 42 is electrically connected, and an input end of the first switching tube Q1 is electrically connected to an output end of the first driving unit 41; the first controlled switch 42 includes a first relay K1, the first relay K1 includes a first port, a second port, a third port and a fourth port, the first port is connected to an input terminal of the first controlled switch 42 (corresponding to an anode of the first diode D1), the second port is connected to an output terminal of the first controlled switch 42 (corresponding to a cathode of the first diode D1), the third port is connected to a control terminal of the first controlled switch 42, the fourth port is electrically connected to a second terminal of the fourth resistor R4, wherein,
in this embodiment, the third resistor R3 and the fourth resistor R4 are both corresponding current-limiting coupling resistors, the fourth port corresponding to the first controlled switch 42 is a port for pulling up the first relay K1 (correspondingly supplying power, in practice, an additional power source may be connected), and the third port and the fourth port of the first relay K1 form a conductive loop (corresponding to the coil portion of the relay) to generate an attraction force to communicate the input end and the output end thereof; meanwhile, the first resistor R1 and the second resistor R2 form a voltage dividing circuit, and divide the first voltage to provide a corresponding driving voltage for the control end of the first switching tube Q1.
The first switch tube Q1 is configured to control the input end and the output end of the first switch tube Q1 to be communicated when the control end of the first switch tube Q1 receives that the voltage value of the second voltage obtained by dividing the first voltage by the first resistor R1 and the second resistor R2 is a preset voltage value, and generate a first driving signal at the input end of the first switch tube Q1.
And the first relay K1 is used for controlling the first port to be communicated with the second port when the input end and the output end of the first switch tube Q1 are communicated and the third port receives a first driving signal, and correspondingly short-circuiting the first diode D1.
In this embodiment, when the input end of the first switch tube Q1 is communicated with the output end, the input end of the first switch tube Q1 is grounded, which is equivalent to generating the first driving signal, at this time, the third port of the first relay K1 is grounded, the third port and the fourth port form a conducting loop, the first relay K1 is attracted to close the first port and the second port, and correspondingly, the first diode D1 is short-circuited.
In order to provide sufficient detection time for line sequence identification of the internal machine, referring to fig. 8, in some embodiments, the short circuit switch module 400 further includes a delay unit 43 and a second diode D2, an anode of the second diode D2 is electrically connected to the dc power supply unit, a cathode of the second diode D2 is electrically connected to the delay unit 43, the delay unit 43 is further electrically connected to the input terminal of the first driving unit 41, wherein,
and the second diode D2 is used for rectifying the first voltage output by the direct current power supply unit.
In this embodiment, the unidirectional conduction function of the diode is utilized to rectify the first voltage output by the switching unit of the outer unit, so that the first voltage is converted into a stable dc voltage.
And a delay unit 43 for controlling the transmission of the first voltage to the first driving unit in a delayed manner.
In this embodiment, after the dc power supply (corresponding to the switching power supply) of the external unit normally outputs the first voltage, before the first voltage is transmitted to the first driving unit 41, the time delay unit 43 delays a preset time, for example: the time t1 is delayed, so that the short-circuit switch module 400 is delayed for the time t1 at the time point of receiving the first voltage originally, and then the first diode D1 is short-circuited, so that the overall identification and adjustment time of the switch adjustment module 300 is increased by t1.
In some embodiments, referring to fig. 8, the delay unit 43 includes an RC delay circuit formed by a fifth resistor R5 and a first capacitor C1, wherein a first end of the fifth resistor R5 is electrically connected to a first end of the first capacitor C1 and an input end of the first driving unit 41, respectively, a second end of the fifth resistor R5 is electrically connected to a cathode of the second diode D2, and a second end of the first capacitor C1 is grounded.
In this embodiment, the first capacitor C2 is charged by the first voltage, so that a delay time with a corresponding duration is realized.
Fig. 10 is a schematic diagram of the system structure of the internal machine according to the preferred embodiment of the present application, and referring to fig. 10, in some embodiments, the switch adjusting module 300 includes a second controlled switch K2 and a third controlled switch K3, controlled ends of the second controlled switch K2 and the third controlled switch K3 are electrically connected to the control module 100 through corresponding driving circuits, the second controlled switch K2 further includes a first input end, a second input end, a first output end, and a second output end, the third controlled switch K3 further includes a third input end, a fourth input end, a third output end, and a fourth output end, the first input end and the third input end are electrically connected to one of the two phase lines of the utility grid corresponding to the first phase line (in this embodiment, preferably, a live line), the second input end and the fourth input end are electrically connected to the other of the two phase lines of the utility grid (correspondingly set as a neutral line), the second output end and the third output end are connected to a first external machine (live line), the first output end and the fourth output end are connected to the other phase line of the two phase lines of the utility grid, wherein,
the control module 100 is configured to output corresponding control signals to the driving circuits corresponding to the second controlled switch K2 and the third controlled switch K3, so that the corresponding driving circuits output the first switching signal and the second switching signal to the second controlled switch 31 and the third controlled switch 32, respectively;
and the second controlled switch K2 is used for correspondingly controlling the on-off of the first input end and the first output end and the on-off of the second input end and the second output end according to the received first switch signal.
In this embodiment, the second controlled switch K2 is a double-pole double-throw relay, and the controlled end and the corresponding power port of the second controlled switch form a loop of a coil part of the second controlled switch, the power port is electrically connected with a direct current power supply unit (e.g., a switching power supply) of the internal machine, and a direct current voltage is provided by the corresponding direct current power supply unit, meanwhile, when the level of the first switch signal received by the controlled end of the second controlled switch is a preset level (low level), the coil part forms a conducting loop, and the coil generates a suction force (correspondingly, a magnetic force is generated to attract the armature, so that the corresponding port is closed) for connecting the first input end with the first output end and the second input end with the second output end; when the level of the first switching signal received by the controlled terminal is not a preset level (for example, a high level), the coil part does not form a conducting loop, so that the first input terminal and the first output terminal, and the second input terminal and the second output terminal are in a disconnected state.
In this embodiment, before the line sequence of the two phase lines coupling the inner unit and the outer unit is adjusted or when the line sequence of the two phase lines coupling the inner unit and the outer unit is corresponding, the second controlled switch K2 is in a closed state, the first input end is correspondingly communicated with the first output end, and the second input end is correspondingly communicated with the second output end, and when the corresponding line sequence adjustment is needed, the first controlled switch K2 is opened, so that the first input end and the first output end, and the second input end and the second output end are in a disconnected state.
And the third controlled switch K3 is used for correspondingly controlling the on-off of the third input end and the fourth input end and the on-off of the fourth input end and the fourth output end according to the received second switch signal.
In this embodiment, the second controlled switch K3 is a double-pole double-throw relay, and the controlled end and the corresponding power port (set as the sixth port) constitute a loop of the coil part thereof, the power port is electrically connected to a dc power supply unit (e.g., a switching power supply) of the internal machine, and a dc voltage is provided by the corresponding dc power supply unit, and meanwhile, when the level of the second switching signal received by the controlled end is a preset level (low level), the coil part constitutes a conduction loop, and the coil generates a suction force (corresponding to generating a magnetic force to pull in the armature so as to close the corresponding port) that the third input end is connected to the third output end and the fourth input end is connected to the fourth output end; and when the level of the second switching signal received by the controlled terminal is not a preset level (for example, a high level), the coil part does not form a conducting loop, so that the third input terminal and the third output terminal, and the fourth input terminal and the fourth output terminal are in an off state.
In this embodiment, before the alignment of the two phase lines coupling the inner unit and the outer unit, or when the alignment of the two phase lines coupling the inner unit and the outer unit is corresponding, the second controlled switch K2 is in an off state, the third input terminal and the third output terminal, and the fourth input terminal and the fourth output terminal are correspondingly turned off, and when the corresponding alignment needs to be performed, the second controlled switch K2 is turned on, so that the third input terminal and the third output terminal, and the fourth input terminal and the fourth output terminal are correspondingly connected.
When the second controlled switch K2 receives the first switch signal and the third controlled switch K3 does not receive the second switch signal, the line sequences of the two phase lines coupling the indoor unit and the outdoor unit are corresponding, and when the second controlled switch K2 does not receive the first switch signal and the third controlled switch K3 receives the second switch signal, the two phase lines in the reverse connection state for coupling the indoor unit and the outdoor unit are correspondingly adjusted.
In this embodiment, in the reverse connection state, the following are correspondingly performed: the live wire of the inner machine corresponds to the zero line of the outer machine, and the zero line of the inner machine corresponds to the live wire of the outer machine; by closing the third controlled switch K3, the line sequence can be adjusted correspondingly, that is, the zero line and the live line of the internal machine and the external machine are adjusted to be zero line and live line.
In some embodiments, referring to fig. 10, the driving circuit includes a sixth resistor (refer to R6 and R8 in fig. 10), a seventh resistor (refer to R7 and R9 in fig. 10), and a second switching tube (refer to Q2 and Q3 in fig. 10), a first end of the sixth resistor is electrically connected to an input end of the corresponding driving circuit, a second end of the sixth resistor is electrically connected to a first end of the seventh resistor and a control end of the second switching tube of the corresponding driving circuit, respectively, an output end of the second switching tube is grounded, and controlled ends of the second controlled switch K2 and the third controlled switch K3 are electrically connected to an input end of the second switching tube of the corresponding driving circuit, wherein the second switching tube is configured to receive a corresponding control signal, control on/off of the input end and the output end of the second switching tube, and generate the first switching signal and the second switching signal correspondingly.
In this embodiment, each of the second controlled switch K2 and the third controlled switch K3 further includes a sixth port (corresponding to a power port), and the sixth port is electrically connected to the first power supply (refer to VCC in fig. 10); in this embodiment, when the level of the first switch signal received by the controlled terminal of the second controlled switch K2 is a preset level (low level), the sixth port and the controlled terminal form a conducting loop, and the coil generates an attraction force (correspondingly, a magnetic force is generated to attract the armature, so that the corresponding port is closed) to connect the first input terminal and the first output terminal, and the second input terminal and the second output terminal; when the level of the first switch signal received by the controlled terminal is not a preset level (for example, a high level), the sixth port and the controlled terminal do not form a conducting loop, so that the first input terminal and the first output terminal, and the second input terminal and the second output terminal are in a disconnected state; when the level of the second switch signal received by the controlled end of the third controlled switch K3 is a preset level (low level), the coil part forms a conducting loop, and the coil generates a suction force (correspondingly, a magnetic force is generated to attract the armature, so that the corresponding port is closed) for connecting the third input end and the third output end and connecting the fourth input end and the fourth output end; and when the level of the second switching signal received by the controlled terminal is not a preset level (for example, a high level), the coil part does not form a conducting loop, so that the third input terminal and the third output terminal, and the fourth input terminal and the fourth output terminal are in an off state.
In this embodiment, the control terminals and the sixth ports of the second controlled switch K2 and the third controlled switch K3 are further connected by corresponding diodes (refer to D6 and D7 in fig. 10), and the anodes of the diodes are electrically connected to the control terminals, and the cathodes thereof are electrically connected to the sixth port, so that the coil portions corresponding to the second controlled switch K2 and the third controlled switch K3 are freewheeling through the diodes.
An embodiment of the present application further provides a method for aligning a zero line and a live line, where fig. 11 is a flowchart of the method for aligning according to the embodiment of the present application, and as shown in fig. 11, the method for aligning the zero line and the live line of an internal unit and an external unit of an air conditioner by using the alignment circuit in the embodiment includes the following steps:
and step S111, after the air conditioner is powered on and started, the control module controls the switch alignment module to communicate two phase lines of the internal unit and the external unit, so that the internal unit supplies power to the external unit.
In this embodiment, after the wiring is completed, the inner unit of the air conditioner is powered on, and the control module integrated with the inner unit starts to operate according to the stable voltage provided by the switching power supply after the switching power supply of the inner unit operates normally, so as to correspondingly control the peripheral circuit to operate correspondingly.
Step S112 is executed in a preset power-on stage of the air conditioner, in which the control module controls the current detection module to detect a current direction on the first phase line, where the current direction is used to identify whether the sequence of the two phase lines coupled to the internal unit and the external unit corresponds to each other.
Step S113, the control module identifies whether the line sequences of the two phase lines coupled to the internal unit and the external unit correspond to each other according to the current direction.
And step S114, when the control module identifies that the line sequences of the two phase lines coupling the internal machine and the external machine do not correspond, the control module adjusts the line sequence of the connection of the two phase lines correspondingly.
In some embodiments, the first phase line is further connected in series with a first diode, the first diode is connected in parallel with a short-circuit switch module, the short-circuit switch module is further coupled with a direct-current power supply unit of the external unit, and the following steps are implemented;
and step 21, the short-circuit switch module receives the first voltage output by the direct-current power supply unit in a delayed manner, and after the preset time is delayed, the first diode is short-circuited according to the first voltage provided by the direct-current power supply unit.
And step 22, before the short-circuit switch module short-circuits the first secondary tube, the control module identifies whether the line sequences of the two phase lines coupled with the internal machine and the external machine correspond to each other according to the current direction, and adjusts the line sequences of the two phase lines coupled with the internal machine and the external machine according to the identification result.
The embodiment of the application also provides an air conditioner, which comprises an inner machine, an outer machine and a zero-live wire reversely connected aligning circuit for aligning the inner machine and the outer machine, wherein the aligning circuit adopts the zero-live wire aligning circuit in the embodiment.
It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is merely illustrative of particular embodiments of the invention that enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. A zero-fire wire aligning circuit is used for aligning zero-fire wires of an inner unit and an outer unit of an air conditioner and is characterized in that the aligning circuit comprises a control module, a current detection module and a switch aligning module, wherein,
the current detection module comprises a sampling port and a feedback port, the feedback port is electrically connected with the control module, and the sampling port is electrically connected with a first phase line in two phase lines which are used for coupling the internal machine and the external machine and connecting the switch alignment module and the external machine; the current detection module is used for detecting the current direction on the first phase line in a preset power-on stage of the air conditioner, wherein the current direction is used for identifying whether the sequence of two phase lines coupling the internal unit and the external unit is corresponding or not;
the switch alignment module is also electrically connected with the control module and the municipal power grid and is used for controlling the on-off of two phase lines coupling the inner machine and the outer machine and aligning the line sequence of the connection of the two phase lines;
the control module is used for controlling the switch alignment module to align the line sequence of the two corresponding phase lines when the control module identifies that the line sequences of the two phase lines coupled with the internal machine and the external machine do not correspond to each other according to the current direction; wherein, the switch adjusting module comprises a second controlled switch and a third controlled switch, the controlled ends of the second controlled switch and the third controlled switch are electrically connected with the control module through corresponding driving circuits, the second controlled switch also comprises a first input end, a second input end, a first output end and a second output end, the third controlled switch also comprises a third input end, a fourth input end, a third output end and a fourth output end, the first input end and the third input end are electrically connected with one of the two phase lines of the city power grid corresponding to the first phase line, the second input end and the fourth input end are electrically connected with the other of the two phase lines of the city power grid, the second output end and the third output end are both connected with the first phase line, the first output end and the fourth output end are both connected with the other phase line of the outdoor unit, wherein,
the control module is configured to output corresponding control signals to the driving circuits corresponding to the second controlled switch and the third controlled switch, respectively, so that the corresponding driving circuits output first switching signals and second switching signals to the second controlled switch and the third controlled switch, respectively;
the second controlled switch is used for correspondingly controlling the on-off of the first input end and the first output end and the on-off of the second input end and the second output end according to the received first switch signal;
the third controlled switch is used for correspondingly controlling the on-off of the third input end and the fourth input end and the on-off of the fourth input end and the fourth output end according to the received second switch signal;
when the second controlled switch receives the first switch signal and the third controlled switch does not receive the second switch signal, the line sequences of the two phase lines coupled with the inner machine and the outer machine are corresponding, and when the second controlled switch does not receive the first switch signal and the third controlled switch receives the second switch signal, the two phase lines of the inner machine and the outer machine in the reverse connection state are adjusted.
2. The zeroing circuit of claim 1, wherein the first phase line is further connected in series with a first diode, an anode of the first diode is electrically connected to the switch adjusting module, and a cathode of the first diode is electrically connected to the external unit, wherein the first diode is configured to cooperate with the current detecting module to detect the current direction on the first phase line.
3. The circuit of claim 2, further comprising a short-circuit switch module connected in parallel with the first diode, the short-circuit switch module being further coupled to the dc power supply unit of the external unit, wherein the short-circuit switch module is configured to short-circuit the first diode after the air conditioner is powered on.
4. The zeroline adjusting circuit of claim 3, wherein the short-circuit switch module comprises a first driving unit and a first controlled switch, an input terminal of the first driving unit is electrically connected to the DC power supply unit, an output terminal of the first driving unit is electrically connected to a control terminal of the first controlled switch, an input terminal of the first controlled switch is electrically connected to an anode of the first diode, and an output terminal of the first controlled switch is electrically connected to a cathode of the first diode, wherein,
the direct current power supply unit is used for outputting a first voltage after the external machine is electrified for a preset time;
the first driving unit is used for generating a first driving signal after receiving the first voltage;
the first controlled switch is used for controlling the input end and the output end of the first controlled switch to be communicated when the first driving signal is received so as to carry out short circuit on the first diode.
5. The zeroing line and live wire adjusting circuit according to claim 4, wherein the first driving unit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a first switching tube, a first end of the first resistor is electrically connected to a first end of the fourth resistor and an input end of the first driving unit, a second end of the first resistor is electrically connected to a first end of the second resistor and a first end of the third resistor, a second end of the second resistor is grounded, a second end of the third resistor is electrically connected to a control end of the first switching tube, and an input end of the first switching tube is connected to an output end of the first driving unit; the first controlled switch comprises a first relay, the first relay comprises a first port, a second port, a third port and a fourth port, the first port is butted with an input end of the first controlled switch, the second port is butted with an output end of the first controlled switch, the third port is butted with a control end of the first controlled switch, the fourth port is electrically connected with a second end of the fourth resistor, wherein,
the first switching tube is used for controlling the input end and the output end of the first switching tube to be communicated when the control end of the first switching tube receives that the voltage value of a second voltage obtained by dividing the first voltage by the first resistor and the second resistor is a preset voltage value, and generating the first driving signal at the input end of the first switching tube;
the first relay is used for controlling the first port to be communicated with the second port when the input end and the output end of the first switch tube are communicated and the third port receives the first driving signal, and correspondingly short-circuiting the first diode.
6. The zeroline and live wire adjusting circuit according to claim 4, wherein the short-circuit switch module further comprises a delay unit and a second diode, an anode of the second diode is electrically connected to the DC power supply unit, a cathode of the second diode is electrically connected to the delay unit, the delay unit is further electrically connected to the input terminal of the first driving unit, wherein,
the second diode is used for rectifying the first voltage output by the direct current power supply unit;
the delay unit is used for delaying and controlling the transmission of the first voltage to the first driving unit.
7. The circuit for adjusting zero and live wires according to claim 6, wherein the delay unit comprises an RC delay circuit consisting of a fifth resistor and a first capacitor, wherein a first end of the fifth resistor is electrically connected with a first end of the first capacitor and the input end of the first driving unit respectively, a second end of the fifth resistor is electrically connected with a cathode of the second diode, and a second end of the first capacitor is grounded.
8. The zeroing line and live line adjusting circuit according to claim 1, wherein the driving circuit comprises a sixth resistor, a seventh resistor and a second switching tube, a first end of the sixth resistor is electrically connected to the input end of the driving circuit, a second end of the sixth resistor is electrically connected to a first end of the seventh resistor and a control end of the second switching tube, respectively, an output end of the second switching tube is grounded, and controlled ends of the second controlled switch and the third controlled switch are electrically connected to corresponding input ends of the second switching tube of the driving circuit, wherein the second switching tube is configured to receive a corresponding control signal, control on/off of the input end and the output end of the second switching tube, and generate the first switching signal and the second switching signal correspondingly.
9. The zeroline current circuit according to claim 1, wherein the second controlled switch and the third controlled switch each comprise a double pole double throw relay.
10. The zeroing line and firewire adjusting circuit according to any one of claims 1 to 9, wherein the current detection module comprises a current detection sensor.
11. A method of aligning a hot and neutral conductor comprising the circuit of claim 1, the method comprising:
after the air conditioner is powered on and started, the control module controls the switch alignment module to communicate two phase lines of the inner unit and the outer unit, so that the inner unit supplies power to the outer unit;
in a preset power-on stage of the air conditioner, the control module controls the current detection module to detect a current direction on the first phase line, wherein the current direction is used for identifying whether the sequence of two phase lines coupled with the inner unit and the outer unit is corresponding or not;
the control module identifies whether the line sequences of the two phase lines coupled with the inner machine and the outer machine correspond to each other according to the current direction;
and when recognizing that the line sequences of the two phase lines coupled with the internal machine and the external machine do not correspond, the control module controls the switch alignment module to align the line sequences of the two phase lines connected correspondingly.
12. The method of claim 11, wherein the first phase line further has a first diode connected in series with a short-circuit switch module connected in parallel, the short-circuit switch module further coupled to the dc power supply unit of the external unit, the method further comprising:
the short-circuit switch module receives the first voltage output by the direct-current power supply unit in a delayed manner, and after the first voltage is delayed for a preset time, the first diode is short-circuited according to the first voltage provided by the direct-current power supply unit;
before the short-circuit switch module short-circuits the first diode, the control module identifies whether the line sequences of the two phase lines coupled with the internal unit and the external unit correspond to each other according to the current direction, and correspondingly controls the switch alignment module to align the line sequences of the two phase lines coupled with the internal unit and the external unit according to an identification result.
13. An air conditioner comprising an inner unit, an outer unit, and a circuit for aligning the reverse connections of the zero-fire line between the inner unit and the outer unit, wherein the circuit for aligning comprises the circuit for aligning the zero-fire line according to any one of claims 1 to 10.
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