CN112648693A - Air conditioner and multi-channel PFC circuit control method - Google Patents
Air conditioner and multi-channel PFC circuit control method Download PDFInfo
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- CN112648693A CN112648693A CN202011505770.3A CN202011505770A CN112648693A CN 112648693 A CN112648693 A CN 112648693A CN 202011505770 A CN202011505770 A CN 202011505770A CN 112648693 A CN112648693 A CN 112648693A
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses an air conditioner and a multi-channel PFC circuit control method, wherein the air conditioner comprises a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger and a multi-channel PFC circuit, wherein the multi-channel PFC circuit comprises a plurality of parallel PFC channels and is used for correcting an input current waveform; a controller configured to: acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel; and controlling the starting of each PFC channel based on the input current and the start-stop information, thereby prolonging the service life of the multi-channel PFC circuit.
Description
Technical Field
The application relates to the field of air conditioner control, in particular to an air conditioner and a multi-channel PFC circuit control method.
Background
Currently, to reduce the switching loss of PFC power devices, a multi-channel interleaved PFC typically starts and stops each channel according to a fixed sequence based on current.
In the prior art, all channels of PFC are started or stopped according to a fixed sequence, for example, three channels of PFC are only started when the current is low along with the rise of the current; starting the second channel again at medium current to perform double-channel control; the third channel is started under the condition of high current to carry out three-channel control; and when the current is reduced, the third channel is stopped first, then the second channel is stopped, and finally the first channel is stopped according to the reverse sequence. In the three-channel PFC, the first channel starts and stops working at first, the working time is longest, and the third channel is opposite, so that the service lives of the devices with the same specification of the three channels are different, the device with the longest working time is damaged first, and then the capacity of the whole PFC is reduced because only the devices of the two channels are left to be incapable of bearing full-load operation, and the devices are damaged successively, so that the whole PFC circuit fails.
Therefore, how to prolong the service life of the multi-channel PFC circuit is a technical problem to be solved at present.
Disclosure of Invention
The invention provides an air conditioner, which is used for solving the technical problem that the service life of a multi-channel PFC circuit can not be prolonged in the prior art, and comprises the following components:
the refrigerant circulation loop is used for circulating the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator and the four-way valve;
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;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates as a condenser and the other operates as an evaporator;
the multi-channel PFC circuit comprises a plurality of PFC channels connected in parallel and is used for correcting the input current waveform;
a controller configured to:
acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel;
controlling the starting of each PFC channel based on the input current and the start-stop information;
the start-stop information comprises the current opened number of the PFC channels, the last opening condition of each PFC channel and the opening duration of each PFC channel.
In some embodiments, the controller is configured to:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel according to the number to be opened and the opening condition.
In some embodiments, the controller is configured to:
when the number to be started is larger than the current started number, starting to start the PFC channels from the last unopened PFC channels until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the last started PFC channel until all the PFC channels are completely stopped.
In some embodiments, the controller is further configured to:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel based on the opening duration and the number to be opened.
In some embodiments, the controller is configured to:
when the number to be started is larger than the current started number, starting to start the PFC channels from the PFC channels with the minimum starting duration until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the PFC channels with the maximum starting time length until all the PFC channels are completely stopped.
In some embodiments, the controller is configured to:
and when the number to be started is equal to the current started number, keeping the starting of each PFC channel.
Correspondingly, the invention also provides a control method of the multi-channel PFC circuit, which is applied to an air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, the multi-channel PFC circuit and a controller, and comprises the following steps:
acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel;
controlling the starting of each PFC channel based on the input current and the start-stop information;
the start-stop information comprises the current opened number of the PFC channels, the last opening condition of each PFC channel and the opening duration of each PFC channel.
In some embodiments, the controlling the opening of each PFC channel based on the input current and the start-stop information specifically includes:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel according to the opening number and the opening condition.
In some embodiments, the controlling the turning on of the PFC according to the turning on number and the turning on condition includes:
when the number to be started is larger than the current started number, starting to start the PFC channels from the last unopened PFC channels until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the last started PFC channel until all the PFC channels are completely stopped.
In some embodiments, the controlling the opening of each PFC channel based on the input current and the start-stop information specifically includes:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel based on the opening duration and the number to be opened.
Compared with the prior art, the method has the following beneficial effects:
the invention discloses an air conditioner and a single-phase motor fault judgment method for the air conditioner, wherein the air conditioner comprises a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger and a multi-channel PFC circuit, wherein the multi-channel PFC circuit comprises a plurality of PFC channels which are connected in parallel and used for correcting an input current waveform; a controller configured to: acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel; and controlling the starting of each PFC channel based on the input current and the start-stop information, wherein the start-stop information comprises the current started number of the PFC channels, the last starting condition of each PFC channel and the starting duration of each PFC channel, so that the difference of the service lives of a plurality of PFC channel devices with the same specification is avoided, and the service life of the multi-channel PFC circuit is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-channel PFC circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a three-channel PFC circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a dual-channel PFC circuit control method according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a three-channel PFC circuit control method according to an embodiment of the present disclosure;
fig. 5 is a schematic flowchart of a control method of a multi-channel PFC circuit according to an embodiment of the present disclosure.
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 for a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler for a cooling mode.
The multi-channel PFC circuit comprises a plurality of parallel PFC channels for correcting the input current waveform, as shown in FIG. 1, the two-channel PFC circuit comprises two parallel PFC channels, wherein the first channel includes a first inductor L1, a first triode Q1, a first diode D1 and a first resistor R1, the second channel includes a second inductor L2, a second triode Q2, a second diode D2 and a second resistor R2, as shown in fig. 2, the three-channel PFC circuit includes three PFC channels connected in parallel, the first channel comprises a first inductor L1, a first triode Q1, a first diode D1 and a first resistor R1, the second channel comprises a second inductor L2, a second triode Q2, a second diode D2 and a second resistor R2, the third channel comprises a third inductor L3, a third triode Q3, a third diode D3 and a third resistor R3, and each PFC channel is controlled to be opened through a triode connected with the controller.
To further describe aspects of the present application, in an example of the present application, the air conditioner includes:
the refrigerant circulation loop is used for circulating the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator and the four-way valve;
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;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates as a condenser and the other operates as an evaporator;
the multi-channel PFC circuit comprises a plurality of PFC channels connected in parallel and is used for correcting the input current waveform;
a controller configured to:
acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel;
controlling the starting of each PFC channel based on the input current and the start-stop information;
the start-stop information comprises the current opened number of the PFC channels, the last opening condition of each PFC channel and the opening duration of each PFC channel.
In the embodiment of the application, the controller first obtains the input current of the multi-channel PFC circuit and the start-stop information of each PFC channel, the start-stop information includes the current opened number of the PFC channels, the last opening condition of each PFC channel and the opening duration of each PFC channel, optionally, the start-stop information of each PFC channel is recorded through the memory module, and the controller obtains the start-stop information of each PFC channel from the memory module. And after the input current and the start-stop information are acquired, controlling the opening of each PFC channel according to the magnitude of the input current and the start-stop information.
To reasonably control the turn-on of the respective PFC channels, in some embodiments, the controller is configured to:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel according to the number to be opened and the opening condition.
In this embodiment, the number of to-be-turned-on PFC channels is determined according to the input current of the multi-channel PFC circuit, generally speaking, the larger the input current is, the more the number of PFC channels that need to be turned on is, and after the number of to-be-turned-on channels is determined, the turning-on of the PFC channels is controlled according to the number of to-be-turned-on channels and the turning-on condition of each PFC channel at the previous time.
It should be noted that the scheme of the above preferred embodiment is only a specific implementation scheme proposed in the present application, and other methods for controlling the on-state of each PFC channel based on the input current and the start-stop information all belong to the protection scope of the present application.
To rationally control the opening of the PFC channel, in some embodiments, the controller is configured to:
when the number to be started is larger than the current started number, starting to start the PFC channels from the last unopened PFC channels until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the last started PFC channel until all the PFC channels are completely stopped.
In this embodiment, the number of the to-be-started PFC channels and the current number of the to-be-started PFC channels are compared, when the number of the to-be-started PFC channels is greater than the current number of the to-be-started PFC channels, it is indicated that the number of the to-be-started PFC channels needs to be increased, at this time, the PFC channels are started from the last non-started PFC channel until all the PFC channels are completely started, so that the PFC channels started each time are as avoided as much as possible as the PFC channels started last time, the time for starting each PFC channel is as much as possible, and the situation that a certain PFC channel is excessively used and damaged in advance is avoided, thereby affecting the service life of. When the number to be started is smaller than the current number to be started, it is indicated that the number of the started PFC channels needs to be reduced, and at this time, the PFC channels are preferentially stopped from the last started PFC channel until all the PFC channels are completely stopped, so that the last started PFC channel can be preferentially rested.
It should be noted that the scheme of the above preferred embodiment is only a specific implementation scheme proposed in the present application, and other methods for controlling the opening of the PFC channel according to the number to be opened and the opening condition all belong to the protection scope of the present application.
To further rationally control the turn-on of each PFC channel, in some embodiments, the controller is further configured to:
determining the number of the PFC channels to be started based on the input current;
and determining the opening of the PFC channel based on the opening duration and the number to be opened.
In this embodiment, the controller determines the number of the PFC channels to be turned on according to the input current of the multi-channel PFC circuit, generally speaking, the number of the PFC channels to be turned on is proportional to the magnitude of the input current, and the controller controls turning on of the PFC channels according to the turning-on duration of each PFC channel and the number of the PFC channels to be turned on. Since the time for turning on the PFC channels each time may be different, controlling the turning on of the PFC channels according to the turning on duration of each PFC channel may further balance the operating time of each PFC channel.
It should be noted that the scheme of the above preferred embodiment is only a specific implementation scheme proposed in the present application, and other methods for controlling the on-state of each PFC channel based on the input current and the start-stop information all belong to the protection scope of the present application.
To rationally control the turn-on of the respective PFC channels, in some embodiments, the controller is configured to:
when the number to be started is larger than the current started number, starting to start the PFC channels from the PFC channels with the minimum starting duration until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the PFC channels with the maximum starting time length until all the PFC channels are completely stopped.
In this embodiment, the number of the to-be-started PFC channels and the current number of the to-be-started PFC channels are compared, when the number of the to-be-started PFC channels is greater than the current number of the to-be-started PFC channels, it is indicated that the number of the to-be-started PFC channels needs to be increased, at this time, the PFC channels are started from the PFC channel with the smallest starting time duration until all the PFC channels are started, so that it is possible to ensure that the starting time durations of each PFC channel are the same as much as possible, when the number of the to-be-started PFC channels is less than the current number of the to-be-started PFC channels, it is indicated that the number of the to-be-started PFC channels is.
It should be noted that the scheme of the above preferred embodiment is only a specific implementation scheme proposed in the present application, and other methods for controlling the opening of the PFC channel based on the opening duration and the number to be opened all belong to the protection scope of the present application.
To ensure stability of current and voltage of a multi-channel PFC circuit, in some embodiments, the controller is configured to:
and when the number to be started is equal to the current started number, keeping the starting of each PFC channel.
In this embodiment, in order to avoid large fluctuation of current and voltage during start-stop switching of the PFC channels, start-stop switching is performed only between different start-up numbers, and different combinations of the same start-up number are not switched, that is, when the number of the PFC channels to be started is equal to the current start-up number of the PFC channels, the PFC channels are kept on, and the switched PFC channels are not converted at this time.
It should be noted that the scheme of the above preferred embodiment is only a specific implementation scheme proposed in the present application, and other methods for controlling the on-state of each PFC channel based on the input current and the start-stop information all belong to the protection scope of the present application.
The invention discloses an air conditioner and a single-phase motor fault judgment method for the air conditioner, wherein the air conditioner comprises a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger and a multi-channel PFC circuit, wherein the multi-channel PFC circuit comprises a plurality of PFC channels which are connected in parallel and used for correcting an input current waveform; a controller configured to: acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel; and controlling the starting of each PFC channel based on the input current and the start-stop information, wherein the start-stop information comprises the current started number of the PFC channels, the last starting condition of each PFC channel and the starting duration of each PFC channel, so that the difference of the service lives of a plurality of PFC channel devices with the same specification is avoided, and the service life of the multi-channel PFC circuit is prolonged.
In order to further illustrate the technical idea of the present invention, the present invention further provides a multi-channel PFC circuit control method, which is applied to an air conditioner including a refrigerant circulation circuit, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a multi-channel PFC circuit, and a controller, as shown in fig. 5, the method specifically includes the following steps:
s101, acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel.
In this step, the input current of the multi-channel PFC circuit and the start-stop information of each PFC channel are first obtained, where the start-stop information includes the current number of the PFC channels that have been started, the last start condition of each PFC channel, and the start duration of each PFC channel.
And S102, controlling the starting of each PFC channel based on the input current and the start-stop information.
In this step, after the input current of the multi-channel PFC circuit and the start-stop information of each PFC channel are acquired, the start of each PFC channel is controlled according to the input current and the start-stop information.
In order to reasonably control the opening of each PFC channel, in some embodiments, the opening of each PFC channel is controlled based on the input current and the start-stop information, specifically:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel according to the opening number and the opening condition.
Specifically, the number of the PFC channels to be started is determined according to the input current of the multi-channel PFC circuit, generally speaking, the larger the input current is, the more the number of the PFC channels needing to be started is, and after the number to be started is determined, the starting of the PFC channels is controlled according to the number to be started and the starting condition of each PFC channel at the last time. Optionally, the number of to-be-turned-on PFC channels may also be determined by voltages at two ends of the multi-channel PFC circuit, which all belong to the protection scope of the present application.
It should be noted that the scheme of the above preferred embodiment is only a specific implementation scheme proposed in the present application, and other methods for controlling the on-state of each PFC channel based on the input current and the start-stop information all belong to the protection scope of the present application.
In order to reasonably control the opening of the PFC channel, in some embodiments, the opening of the PFC channel is controlled according to the opening number and the opening condition, specifically:
when the number to be started is larger than the current started number, starting to start the PFC channels from the last unopened PFC channels until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the last started PFC channel until all the PFC channels are completely stopped.
In this embodiment, the number of the to-be-started PFC channels and the current number of the to-be-started PFC channels are compared, when the number of the to-be-started PFC channels is greater than the current number of the to-be-started PFC channels, it is indicated that the number of the to-be-started PFC channels needs to be increased, at this time, the to-be-started PFC channels are started from the last non-started PFC channel preferentially until all the PFC channels are started, so that the PFC channels started each time are avoided as much as possible as the PFC channel started last time, the time for starting each PFC channel is made as the same as the time for starting the last PFC channel as possible, when the number of the to-be-started PFC channels is less than the current number of the to-be-started PFC channels, it is indicated that the number of the to-be-started PFC channels is reduced preferentially from the last.
As shown in fig. 3 and 4, the PFC channels are controlled to be turned on in the direction of an arrow, where 0 represents that the PFC channels are stopped, 1 represents that the PFC channels are turned on, and when the number of the PFC channels is two, if two, the number to be turned on is larger than the current number to be turned on from the stop of all the PFC channels to the start of the single channel, and 10 represents that the previous channel is turned on last time, so that the PFC channel is controlled to be turned on 01 (the subsequent channel is turned on) this time, that is, the channel which is not turned on last time is turned on first. When the number of the PFC channels is three, as shown in (c), the number to be started is smaller than the current started number from the two-channel start to the single-channel start, and 100 represents that the last started channel is the foremost channel, so that the PFC channel is controlled to be started to 010 (the foremost channel is stopped) this time, that is, the last started channel is preferably stopped.
It should be noted that the above solution of the preferred embodiment is only a specific implementation solution proposed in the present application, and other methods for controlling the on-state of the PFC according to the on-number and the on-state all belong to the protection scope of the present application.
In order to further reasonably control the opening of each PFC channel, in some embodiments, the opening of each PFC channel is controlled based on the input current and the start-stop information, specifically:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel based on the opening duration and the number to be opened.
Specifically, the number of the PFC channels to be started is determined according to the input current of the multi-channel PFC circuit, generally speaking, the number of the PFC channels to be started is in direct proportion to the magnitude of the input current, and the controller controls the PFC channels to be started according to the starting duration of each PFC channel and the number of the PFC channels to be started. Because the time for starting the PFC channels at each time may be different, the working time of each PFC channel can be further balanced by controlling the starting of the PFC channels according to the starting time of each PFC channel, and the phenomenon that a certain PFC channel is excessively used and damaged in advance is avoided, so that the service life of the whole PFC circuit is influenced.
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 (10)
1. An air conditioner, comprising:
the refrigerant circulation loop is used for circulating the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator and the four-way valve;
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;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates as a condenser and the other operates as an evaporator;
the multi-channel PFC circuit comprises a plurality of PFC channels connected in parallel and is used for correcting the input current waveform;
a controller configured to:
acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel;
controlling the starting of each PFC channel based on the input current and the start-stop information;
the start-stop information comprises the current opened number of the PFC channels, the last opening condition of each PFC channel and the opening duration of each PFC channel.
2. The air conditioner of claim 1, wherein the controller is configured to:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel according to the number to be opened and the opening condition.
3. The air conditioner of claim 2, wherein the controller is configured to:
when the number to be started is larger than the current started number, starting to start the PFC channels from the last unopened PFC channels until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the last started PFC channel until all the PFC channels are completely stopped.
4. The air conditioner of claim 1, wherein the controller is further configured to:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel based on the opening duration and the number to be opened.
5. The air conditioner of claim 4, wherein the controller is configured to:
when the number to be started is larger than the current started number, starting to start the PFC channels from the PFC channels with the minimum starting duration until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the PFC channels with the maximum starting time length until all the PFC channels are completely stopped.
6. The air conditioner according to claim 2 or 4, wherein the controller is configured to:
and when the number to be started is equal to the current started number, keeping the starting of each PFC channel.
7. A multi-channel PFC circuit control method is characterized in that the method is applied to an air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a multi-channel PFC circuit and a controller, and the method comprises the following steps:
acquiring input current of the multi-channel PFC circuit and start-stop information of each PFC channel;
controlling the starting of each PFC channel based on the input current and the start-stop information;
the start-stop information comprises the current opened number of the PFC channels, the last opening condition of each PFC channel and the opening duration of each PFC channel.
8. The method according to claim 7, wherein the controlling the turning on of each PFC channel based on the input current and the start-stop information includes:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel according to the opening number and the opening condition.
9. The method of claim 8, wherein controlling the turning on of the PFC according to the turn-on number and the turn-on condition comprises:
when the number to be started is larger than the current started number, starting to start the PFC channels from the last unopened PFC channels until all the PFC channels are completely started;
and when the number to be started is smaller than the current started number, starting to stop the PFC channels from the last started PFC channel until all the PFC channels are completely stopped.
10. The method according to claim 7, wherein the controlling the turning on of each PFC channel based on the input current and the start-stop information includes:
determining the number of the PFC channels to be started based on the input current;
and controlling the opening of the PFC channel based on the opening duration and the number to be opened.
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Citations (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0627870A2 (en) * | 1993-06-01 | 1994-12-07 | ABBPATENT GmbH | Method for triggering/regulating at least two parallel resonant circuit converters |
| KR20030050930A (en) * | 2001-12-19 | 2003-06-25 | 주식회사 엘지이아이 | A power factor control circuit of air-conditioner |
| CN201903575U (en) * | 2010-12-24 | 2011-07-20 | 海信（山东）空调有限公司 | Direct current detection circuit and inverter air-conditioner applying same |
| JP2013240274A (en) * | 2013-07-10 | 2013-11-28 | Mitsubishi Electric Corp | Ac-dc conversion device, motor drive device, compressor drive device, air conditioner and heat pump water heater |
| JP2015162910A (en) * | 2014-02-26 | 2015-09-07 | シャープ株式会社 | Ac/dc converter and electric apparatus including the same |
| CN104935160A (en) * | 2015-07-01 | 2015-09-23 | 重庆卓美华视光电有限公司 | Energy-saving control circuit, energy-saving control method and switching power supply |
| CN105024539A (en) * | 2015-06-26 | 2015-11-04 | 广东美的制冷设备有限公司 | Voltage short interruption reply method and device of single-phase AC power supply |
| CN105091252A (en) * | 2015-09-23 | 2015-11-25 | 广东美的制冷设备有限公司 | Control method and system of PFC circuit in air conditioner and air conditioner |
| CN105164920A (en) * | 2013-03-15 | 2015-12-16 | 艾尔弗雷德·E·曼科学研究基金会 | Current sensing multiple output current stimulators with fast turn on time |
| CN105185093A (en) * | 2015-07-29 | 2015-12-23 | 广东欧珀移动通信有限公司 | Remote controller implementation method and device |
| CN106288192A (en) * | 2016-08-17 | 2017-01-04 | 青岛海尔空调器有限总公司 | Air-conditioning pfc circuit control method and air-conditioning |
| US20170187279A1 (en) * | 2015-12-25 | 2017-06-29 | Rohm Co., Ltd. | Power factor correction circuit, control circuit and control method thereof, electronic apparatus, and power adapter |
| CN108768153A (en) * | 2018-05-25 | 2018-11-06 | 青岛海尔空调电子有限公司 | The management method and equipment of number of channels are run in multiphase interleaving PFC circuit |
| CN108809070A (en) * | 2017-04-26 | 2018-11-13 | 立锜科技股份有限公司 | Power supply change-over device, slow start circuit and power supply control chip |
| CN108847181A (en) * | 2018-07-13 | 2018-11-20 | 京东方科技集团股份有限公司 | A kind of grayscale adjusts circuit and display device |
| CN108988853A (en) * | 2018-07-04 | 2018-12-11 | 西安电子科技大学 | Digital auxiliary lock circuit |
| CN109764503A (en) * | 2019-01-15 | 2019-05-17 | 海信（广东）空调有限公司 | Power-supplying circuit and air conditioner outside a kind of air conditioning chamber |
| CN109823574A (en) * | 2019-02-18 | 2019-05-31 | 中国科学院国家空间科学中心 | A kind of spaceborne intermittence service load system |
| WO2019120295A1 (en) * | 2017-12-21 | 2019-06-27 | Bitmain Technologies Inc. | Power supply circuit, series power supply method and computing system thereof |
| US20190238046A1 (en) * | 2016-09-30 | 2019-08-01 | Daikin Industries, Ltd. | Active filter device, air conditioning device, and air conditioning system |
| CN110442222A (en) * | 2019-07-08 | 2019-11-12 | 新华三技术有限公司成都分公司 | Hard disk electrification control method and device |
| US20190348833A1 (en) * | 2018-05-09 | 2019-11-14 | Delta Electronics,Inc. | Module of suppressing inrush current, method of controlling the same and on-board bidirectional charger using the same |
| CN111412625A (en) * | 2019-01-07 | 2020-07-14 | 广东美的制冷设备有限公司 | Circuit board and air conditioner |
| CN111486543A (en) * | 2020-04-21 | 2020-08-04 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
| US20200304019A1 (en) * | 2019-03-19 | 2020-09-24 | Stmicroelectronics International N.V. | Enhancing high-voltage startup voltage rating for pwm controllers with internal high voltage startup circuit |
| EP3739274A1 (en) * | 2018-01-11 | 2020-11-18 | Mitsubishi Electric Corporation | Air conditioner |
-
2020
- 2020-12-18 CN CN202011505770.3A patent/CN112648693B/en active Active
Patent Citations (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0627870A2 (en) * | 1993-06-01 | 1994-12-07 | ABBPATENT GmbH | Method for triggering/regulating at least two parallel resonant circuit converters |
| KR20030050930A (en) * | 2001-12-19 | 2003-06-25 | 주식회사 엘지이아이 | A power factor control circuit of air-conditioner |
| CN201903575U (en) * | 2010-12-24 | 2011-07-20 | 海信（山东）空调有限公司 | Direct current detection circuit and inverter air-conditioner applying same |
| CN105164920A (en) * | 2013-03-15 | 2015-12-16 | 艾尔弗雷德·E·曼科学研究基金会 | Current sensing multiple output current stimulators with fast turn on time |
| JP2013240274A (en) * | 2013-07-10 | 2013-11-28 | Mitsubishi Electric Corp | Ac-dc conversion device, motor drive device, compressor drive device, air conditioner and heat pump water heater |
| JP2015162910A (en) * | 2014-02-26 | 2015-09-07 | シャープ株式会社 | Ac/dc converter and electric apparatus including the same |
| CN105024539A (en) * | 2015-06-26 | 2015-11-04 | 广东美的制冷设备有限公司 | Voltage short interruption reply method and device of single-phase AC power supply |
| CN104935160A (en) * | 2015-07-01 | 2015-09-23 | 重庆卓美华视光电有限公司 | Energy-saving control circuit, energy-saving control method and switching power supply |
| CN105185093A (en) * | 2015-07-29 | 2015-12-23 | 广东欧珀移动通信有限公司 | Remote controller implementation method and device |
| CN105091252A (en) * | 2015-09-23 | 2015-11-25 | 广东美的制冷设备有限公司 | Control method and system of PFC circuit in air conditioner and air conditioner |
| US20170187279A1 (en) * | 2015-12-25 | 2017-06-29 | Rohm Co., Ltd. | Power factor correction circuit, control circuit and control method thereof, electronic apparatus, and power adapter |
| CN106288192A (en) * | 2016-08-17 | 2017-01-04 | 青岛海尔空调器有限总公司 | Air-conditioning pfc circuit control method and air-conditioning |
| US20190238046A1 (en) * | 2016-09-30 | 2019-08-01 | Daikin Industries, Ltd. | Active filter device, air conditioning device, and air conditioning system |
| CN108809070A (en) * | 2017-04-26 | 2018-11-13 | 立锜科技股份有限公司 | Power supply change-over device, slow start circuit and power supply control chip |
| WO2019120295A1 (en) * | 2017-12-21 | 2019-06-27 | Bitmain Technologies Inc. | Power supply circuit, series power supply method and computing system thereof |
| EP3739274A1 (en) * | 2018-01-11 | 2020-11-18 | Mitsubishi Electric Corporation | Air conditioner |
| US20190348833A1 (en) * | 2018-05-09 | 2019-11-14 | Delta Electronics,Inc. | Module of suppressing inrush current, method of controlling the same and on-board bidirectional charger using the same |
| CN108768153A (en) * | 2018-05-25 | 2018-11-06 | 青岛海尔空调电子有限公司 | The management method and equipment of number of channels are run in multiphase interleaving PFC circuit |
| CN108988853A (en) * | 2018-07-04 | 2018-12-11 | 西安电子科技大学 | Digital auxiliary lock circuit |
| CN108847181A (en) * | 2018-07-13 | 2018-11-20 | 京东方科技集团股份有限公司 | A kind of grayscale adjusts circuit and display device |
| CN111412625A (en) * | 2019-01-07 | 2020-07-14 | 广东美的制冷设备有限公司 | Circuit board and air conditioner |
| CN109764503A (en) * | 2019-01-15 | 2019-05-17 | 海信（广东）空调有限公司 | Power-supplying circuit and air conditioner outside a kind of air conditioning chamber |
| CN109823574A (en) * | 2019-02-18 | 2019-05-31 | 中国科学院国家空间科学中心 | A kind of spaceborne intermittence service load system |
| US20200304019A1 (en) * | 2019-03-19 | 2020-09-24 | Stmicroelectronics International N.V. | Enhancing high-voltage startup voltage rating for pwm controllers with internal high voltage startup circuit |
| CN110442222A (en) * | 2019-07-08 | 2019-11-12 | 新华三技术有限公司成都分公司 | Hard disk electrification control method and device |
| CN111486543A (en) * | 2020-04-21 | 2020-08-04 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
Non-Patent Citations (2)
| Title |
|---|
| LIANG RONGXIN；QIU SHUISHENG: "The novel realizations of current-mode based accurate active AC-DC converter", 《CHINESE JOURNAL OF SCIENTIFIC INSTRUMENT》, vol. 25, no. 3, pages 346 - 9 * |
| 蒋志宏, 黄立培, 孙晓东, 郭宇婕: "基于DSP的DC/DC Boost PFC模块的并联交错控制研究", 电工电能新技术, no. 03, pages 27 - 30 * |
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