CN111313535A - Direct-drive air conditioner - Google Patents
Direct-drive air conditioner Download PDFInfo
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- CN111313535A CN111313535A CN202010229862.7A CN202010229862A CN111313535A CN 111313535 A CN111313535 A CN 111313535A CN 202010229862 A CN202010229862 A CN 202010229862A CN 111313535 A CN111313535 A CN 111313535A
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- storage battery
- energy storage
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- energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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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
-
- 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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—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 using natural energy, e.g. solar energy, energy from the ground using solar energy
- F24F2005/0067—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 using natural energy, e.g. solar energy, energy from the ground using solar energy with photovoltaic panels
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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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
Abstract
The invention discloses a direct-drive air conditioner, which comprises a first change-over switch, a second change-over switch and a third change-over switch, wherein the first change-over switch is connected to a charging circuit of an energy storage battery; an electric quantity detection module; the second change-over switch is connected to a power supply circuit of the energy storage battery; the control module is configured to: when the indoor unit is not started, the energy storage battery is in a charging control mode; when the indoor unit is started, the energy storage battery is in a discharge control mode; a charging control mode: when the charging frequency of the energy storage battery is less than the pre-charging frequency and the charging is needed, controlling the working state of the first selector switch according to the feedback of the energy power generation detection device and the working state of the indoor unit; a discharge control mode: controlling the working state of the second change-over switch according to the feedback of the energy generation detection device, the real-time electric quantity of the energy storage battery and the working state of the indoor unit; the output voltages of the first, second and third direct current power supplies are sequentially increased. The invention is used for effectively utilizing environment-friendly energy and prolonging the service life of the energy storage battery.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a direct-drive air conditioner.
Background
With the development of new energy industry entering a mature stage, houses occupied by urban users (including new rural users) are developed to present multilayer or high-rise from previous single houses, most of the users do not have roofs of the users at present, the space of the outer vertical face which can be used by the users at the multilayer or high-rise is very narrow, the space for installing the solar panel is extremely limited, the solar air conditioners on the present market all need large installation space of the solar panel, less the solar air conditioners need tens of the solar air conditioners, and the solar air conditioners are unrealistic for the users at the multilayer and high-rise.
The scheme that an outdoor unit drags an indoor unit is adopted in a traditional household air conditioner, the power of the indoor unit is often low and may be only 20-30W, and if a solar panel is independently installed for the indoor unit to assist power supply aiming at the household air conditioner with one dragging, the cost is high, the solar energy utilization rate is low, and wiring of each room is difficult.
In the existing central air conditioner in the market, a user usually needs one outdoor unit to drive four or more indoor units, the power of the whole indoor unit is added up to 200W to 300W, and the solar panel (or wind driven generator) and the energy storage battery are utilized to perform auxiliary power supply for more than one indoor unit, so that the environment-friendly electric energy is effectively utilized.
However, when the environment-friendly electric energy is utilized, most of the energy storage batteries are not limited to charging and discharging, and the service life of the energy storage batteries is difficult to guarantee.
Disclosure of Invention
The invention provides a direct-drive air conditioner which effectively utilizes environment-friendly energy and prolongs the service life of an energy storage battery.
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
the utility model provides a directly drive air conditioner, includes indoor set, its characterized in that still includes:
a utility grid that outputs alternating current;
an AC-DC conversion device that converts alternating current output from the utility grid into a first direct current power supply;
the anode of the first diode is connected with the output end of the first direct-current power supply, and the cathode of the first diode is connected with the power supply end of the indoor unit;
a new energy power generation device that outputs a second direct current power supply;
the energy power generation detection device is used for judging whether the new energy power generation device generates power normally;
the anode of the second diode is connected with the output end of the second direct-current power supply, and the cathode of the second diode is connected between the cathode of the first diode and the power supply end;
an energy storage battery that outputs a third direct current power supply;
the first change-over switch is connected to a charging circuit of the energy storage battery;
the electric quantity detection module is used for judging the electric quantity of the energy storage battery;
the second change-over switch is connected to a power supply circuit for supplying power to the indoor unit by the energy storage battery;
the control module is connected with the energy power generation detection device, the electric quantity detection module, the first change-over switch, the second change-over switch and the indoor unit;
the control module is configured to: when the indoor unit is not started, the energy storage battery is in a charging control mode; when the indoor unit is started, the energy storage battery is in a discharge control mode;
wherein the charging control mode is as follows: when the charging frequency of the energy storage battery is less than the pre-charging frequency and the charging is needed, controlling the working state of the first selector switch according to the feedback of the energy power generation detection device and the working state of the indoor unit;
the discharge control mode: controlling the working state of the second selector switch according to the feedback of the energy generation detection device, the real-time electric quantity of the energy storage battery and the working state of the indoor unit;
and the output voltages of the first direct current power supply, the second direct current power supply and the third direct current power supply are increased in sequence.
In some embodiments of the present application, when the number of times of charging the energy storage battery is less than the number of times of pre-charging and charging is required, detecting whether a feedback result of the energy generation detection apparatus is greater than or equal to a preset value; if yes, continuously charging the energy storage battery until the energy storage battery is full of electricity and disconnecting the first change-over switch, wherein the working state of the indoor unit is detected in real time during the charging period; if the indoor unit is started, the first change-over switch is switched off, and the charging times are counted at the same time; if the indoor unit is not started, the energy storage battery is continuously charged until the indoor unit is full of electricity, and the first change-over switch is switched off; if not, the first change-over switch is switched off, and the charging times are counted at the same time.
In some embodiments of the present application, when the energy storage battery is in a charging control mode and the first switch is turned off, the first switch is delayed to be turned on for a first time, and the working state of the indoor unit is detected in real time during the first time; if the indoor unit is started, entering the discharge control mode; and if the indoor unit is not started, continuing to charge and judge the energy storage battery until the charging times reach the pre-charging times.
In some embodiments of the present application, when the number of times of charging reaches the number of times of precharging, after delaying the first time, continuing to delay a second time, and determining whether the second time is greater than or equal to a preset time; if so, the energy storage battery reenters the charging control mode; if not, continuing to charge and judge the energy storage battery until the charging times reach the pre-charging times.
In some embodiments of the present application, the second time is greater than or equal to 4 hours.
In some embodiments of the present application, the direct drive air conditioner further comprises: a coil of the first relay is connected with the control module, and the first change-over switch is a normally open switch of the first relay; and a coil of the second relay is connected with the control module, and the second change-over switch is a normally open switch of the second relay.
In some embodiments of the present application, the new energy power generation device is a solar panel battery pack or a wind power generator.
In some embodiments of the present application, when the new energy power generation device is a solar panel battery pack, the energy power generation detection device is a light intensity detection module, which is used to detect whether the sunlight intensity satisfies the requirement of normal power generation of the solar panel battery pack; when the new energy power generation device is a wind driven generator, the energy power generation detection device is a wind power detection module and is used for detecting whether the wind power strength meets the requirement of normal power generation of the wind driven generator.
In some embodiments of the present application, when the new energy power generation device supplies power to the indoor unit, or the utility power grid supplies power to the indoor unit, the first switch switches off.
In some embodiments of the present application, the direct drive air conditioner further comprises: a battery management unit connected between the first switch and the energy storage battery.
The direct-drive air conditioner provided by the invention has the following advantages and beneficial effects:
(1) the utility power grid provides a first direct current power supply through the AC-DC conversion device, the new energy power generation device provides a second direct current power supply, the energy storage battery provides a third direct current power supply, and the output voltages of the first direct current power supply, the second direct current power supply and the third direct current power supply are sequentially increased, so that when the indoor unit is started, if the new energy power generation device can meet normal power generation, the new energy power generation device is used for supplying power to the indoor unit, if the new energy power generation device cannot meet normal power generation and the electric quantity of the energy storage battery is sufficient, the energy storage battery is used for supplying power to the indoor unit, if the new energy power generation device cannot meet normal power generation and the electric quantity of the energy storage battery is insufficient, the utility power grid is used for supplying power to the indoor unit, environment-friendly electric energy is preferentially used, utility power grid energy is saved, the;
(2) when the energy storage battery needs to be charged, the working state of the first change-over switch is controlled according to the result fed back by the energy power generation detection device and the working state of the indoor unit, the charging of the energy storage battery is controlled, the charging within the pre-charging times is realized, and the service life of the energy storage battery is prevented from being reduced due to frequent charging;
(3) and controlling the working state of the second change-over switch according to the feedback of the energy power generation detection device, the real-time electric quantity of the energy storage battery and the working state of the indoor unit, and controlling the discharge of the energy storage battery.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, 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 structural diagram of an embodiment of a direct-drive air conditioner according to the present invention.
Fig. 2 is a flowchart of a charging control mode of an energy storage battery in an embodiment of the direct-drive air conditioner provided by the invention;
fig. 3 is a flowchart of a discharge control mode of an energy storage battery in an embodiment of the direct-drive air conditioner provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
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 invention.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
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 invention, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1, there is shown a block diagram of a direct drive air conditioner in the present application.
The utility grid 1 outputs Alternating Current, the Alternating Current is converted into direct Current through an AC (Alternating Current) -DC (direct Current) conversion device 2, and the direct Current converted and output by the utility grid 1 is marked as a first direct Current power supply, and the output voltage is marked as U1.
In the present application, the AC-DC conversion device 2 may be selected as an alternating current power converter or an adapter; the alternating current-direct current conversion circuit which is set up by the existing circuit and can convert the alternating current of the commercial power into the direct current can be selected, and the specific circuit implementation can refer to the prior art.
A first diode D1 is connected between the output terminal of the first dc power supply and the power supply terminal of the indoor unit a, the anode thereof is connected to the output terminal of the first dc power supply, and the cathode thereof is connected to the power supply terminal of the indoor unit a.
The new energy power generation device refers to a device that generates power by using new energy (e.g., solar energy, wind energy), such as the solar panel battery 3 and the wind power generator.
The direct current power supply output by the new energy power generation device is marked as a second direct current power supply, and the output voltage of the second direct current power supply is marked as U2.
A second diode D2 is connected between the output terminal of the second dc power supply and the power supply terminal of the indoor unit a, the anode thereof is connected to the output terminal of the second dc power supply, and the cathode thereof is connected between the cathode of the first diode D1 and the power supply terminal of the indoor unit a.
And the energy power generation detection device is used for judging whether the new energy power generation device generates power normally.
If the new energy power generation device is the solar panel battery pack 3, the energy power generation detection device is correspondingly the light intensity detection module 4.
The light intensity detection module 4 is used for detecting the sunlight intensity and judging whether the sunlight intensity detected at present meets the normal power generation of the solar panel battery pack 3. The light intensity detection module 4 is connected with the control module 5, and is used for transmitting the judgment result of the light intensity detection module 4 to the control module 5.
When the intensity of the sunlight detected by the light intensity detection module 4 is greater than a certain threshold, it can be stated that the solar panel battery 3 can normally generate electricity.
And if the new energy power generation device is a wind driven generator, the energy power generation detection device corresponds to a wind power detection module.
The wind power detection module is used for detecting the wind power intensity and judging whether the current detected wind power intensity meets the normal power generation of the wind driven generator. The wind power detection module is connected with the control module 5 and is used for transmitting the judgment result of the wind power detection module to the control module 5.
When the detected wind strength is greater than a certain threshold value, it can be said that the wind power generator can normally generate power.
For convenience of explanation, the solar panel battery 3 is explained as an example as follows.
The electric energy that the energy storage battery 6 can store can be provided by the solar panel battery 3 or by the utility grid 1. Preferably, the electric energy is provided by the solar panel battery pack 3, so that the environment-friendly energy is effectively utilized.
The dc power output by the energy storage battery 6 is denoted as a third dc power, and the output voltage thereof is denoted as U3.
However, in consideration of the situation that the indoor unit a needs to be started when the sunlight intensity is insufficient and the utility power grid 1 is powered off, the energy storage battery 6 needs to be kept in a full-power standby state, the energy storage battery 6 can store energy by using solar energy when the sunlight intensity is sufficient, and the utility power grid 1 can store energy when the sunlight intensity is insufficient.
The electric quantity detection module 7 detects the electric quantity of the energy storage battery 6 in real time and judges the current detected electric quantity. The electric quantity detection module 7 is connected with the control module 5 and used for transmitting the judgment result of the electric quantity detection module 7 to the control module 5.
The battery management unit 8 is used for managing the electric energy input to the energy storage battery 6 and performing charging control on the energy storage battery 6.
A first switch 9 is provided on a charging line for charging the energy storage battery 6, and the battery management unit 8 is connected between the energy storage battery 6 and the first switch 9.
A second change-over switch 10 is provided on the power supply line of the energy storage battery 6 for supplying power to the indoor unit a.
The first and second changeover switches 9, 10 are each controlled by the control module 5.
When the first switch 9 is turned off, the energy storage battery 6 cannot be supplied with power through the battery management unit 8, and when the first switch 9 is turned on, the energy storage battery 6 can be supplied with power through the battery management unit 8.
When the second switch 10 is turned off, the energy storage battery 6 cannot supply power to the indoor unit a, and when the second switch 10 is turned on, the energy storage battery 6 supplies power to the indoor unit a.
In addition, the control module 5 is further connected to the indoor unit a, and is configured to control on/off of the indoor unit a or obtain a working state of the indoor unit a, that is, power on/off.
Referring to fig. 1, a process of supplying power to the indoor unit a of the direct drive air conditioner is described in detail as follows.
[ charging of energy storage Battery ]
When the direct-drive air conditioner is not started, the control module 5 acquires the working state of the indoor unit A which is closed, when the light intensity detection module 4 judges that the sunlight intensity is sufficient, the first diode D1 is cut off due to the fact that U1 is smaller than U2, and the control module 5 controls the first switch 9 to be switched on, so that the solar panel battery pack 3 charges the energy storage battery 6 through the second diode D2, the first switch 9 and the battery management unit 8, and storage is facilitated.
When the direct-drive air conditioner is not started, if the light intensity detection module 4 judges that the sunlight intensity is insufficient to U1> U2, the control module 5 cannot control the first switch 9 to be switched on, and the electric energy waste caused by the charging of the energy storage battery 6 by the commercial power grid 1 is avoided.
[ Power supply to indoor Unit ]
When the direct-drive air conditioner is started, the control module 5 acquires the starting working state of the indoor unit a, and when the light intensity detection module 4 judges that the sunlight intensity is sufficient, the first diode D1 is cut off and the second diode D2 is switched on because the U1 is greater than the U2 and greater than the U3, and the solar panel battery pack 3 supplies power to the indoor unit a through the second diode D2.
Meanwhile, the control module 5 controls the first switch 9 to be turned off according to the sunlight intensity and the working state judgment of the indoor unit a, and the energy storage battery 6 is not charged when the solar panel battery pack 3 supplies power to the indoor unit a.
When the direct-drive air conditioner is started, if the light intensity detection module 4 judges that the sunlight intensity is insufficient, during the working period of the indoor unit a, the U2 is continuously pulled down, so that the U1> the U2, if the electric quantity of the energy storage battery 6 is detected to be sufficient at the same time, the judgment result shows that the U2 is less than the U3, and the U1 is less than the U3, so that the first diode D1 and the second diode D2 are both cut off, the control module 5 synthesizes the sunlight intensity, the electric quantity of the energy storage battery 6 and the working state judgment of the indoor unit a to control the second change-over switch 10 to be switched on, and at the moment, the energy storage battery 6 supplies power.
When the direct-drive air conditioner is started, if the light intensity detection module 4 judges that the sunlight intensity is insufficient, the U2 is continuously pulled down during the working period of the indoor unit a, so that the U1> the U2, and if the electric quantity of the energy storage battery 6 is detected to be insufficient at the same time, the control module 5 cannot control to switch on the second change-over switch 10, at this time, the first diode D1 is switched on, the second diode D2 is switched off, and the commercial power grid 1 supplies power to the indoor unit a through the AC-DC conversion device 2 and the first diode D1.
Meanwhile, the control module 5 integrates the sunlight intensity, the electric quantity of the energy storage battery 6 and the working state judgment of the indoor unit a to control the first switch 9 to be switched off, and when the commercial power grid 1 supplies power to the indoor unit a, the commercial power grid 1 is not used for charging the energy storage battery 6, so that the electric energy is saved.
According to the direct-drive air conditioner, when the sunlight intensity is sufficient, the solar panel battery pack 3 is preferentially used for supplying power to the indoor unit A; when the sunlight intensity is insufficient and the electric quantity of the energy storage battery 6 is sufficient, the energy storage battery 6 is used for supplying power to the indoor unit A; when the sunlight intensity is insufficient and the electric quantity of the energy storage battery 6 is insufficient, the commercial power grid 1 is used for supplying power to the indoor unit A, so that the environment-friendly energy is effectively utilized, the energy consumption is saved, and the energy utilization rate is improved.
Indoor set A in this application indicates an indoor set or more than an indoor set, utilizes one set of solar panel auxiliary power supply unit to supply power for directly driving many indoor sets of air conditioner jointly, effectively utilizes this solar panel auxiliary power supply unit, and the air conditioner user all can be at this solar panel of oneself facade installation.
In the present application, the first switch 9 and the second switch 10 are normally open switches of relays, respectively, the first switch 9 is a normally open switch of a first relay (not shown), and the second switch 10 is a normally open switch of a second relay (not shown).
The coil of the first relay and the coil of the second relay are powered on or powered off under the control of the control module 5. When the coil of the first relay is energized, the first switch 9 is turned on, and when the coil of the first relay is de-energized, the first switch 9 is turned off. When the coil of the second relay is energized, the second change-over switch 10 is turned on, and when the coil of the first relay is de-energized, the second change-over switch 10 is turned off.
Of course, the first switch 9 and the second switch 10 may also adopt other electronic switches that can be controlled by the control module 5 to be turned on and off, such as an optical coupler, a silicon controlled rectifier, and the like.
In the following, the charge control and the discharge control of the energy storage battery 6 will be described by taking the solar panel battery 3 as an example.
[ Charge control mode for energy storage Battery ]
The working state of the indoor unit a, i.e., power on/off, can be obtained by the control module 5.
When the indoor unit a is not started and the current sunlight intensity E is sufficient, the control module 5 controls the first switch 9 to be closed, and the solar panel battery pack 3 is used for charging the energy storage battery 6.
When the indoor unit a is not started and the current sunlight intensity E is insufficient, the control module 5 controls the first switch 9 to be switched off, so that the energy storage battery 6 is prevented from being charged by the commercial power grid 1, and electric energy waste is avoided.
In order to avoid the problem of service life reduction of the energy storage battery 6 caused by frequent charging of the energy storage battery 6, the pre-charging times N are preset for the energy storage battery 6, and charging of the energy storage battery 6 is controlled according to the current sunlight intensity E fed back by the light intensity detection module 5 and the working state of the indoor unit A.
Referring to fig. 2, a flowchart of a charging control mode of the energy storage battery 6 in the state that the indoor unit a is not turned on is described in detail.
S11: the number of initial charges n, i.e., n = 0.
S12: and judging whether the charging frequency N reaches the charging frequency N or not.
When the number of charging times N has not reached the number of precharging times N, the flow proceeds to S13.
When the number of charging times N has not reached the number of precharging times N, the flow proceeds to S17.
S13: and when the charging time N does not reach the pre-charging time N, judging whether the electric quantity of the energy storage battery 6 is smaller than the first electric quantity Q1 needing to be charged.
The electric quantity detection module 7 detects the electric quantity of the energy storage battery 6 in real time, compares the real-time electric quantity Q with a preset first electric quantity Q1, and when Q > = Q1, indicates that the energy storage battery 6 still has electricity at present and does not need to be charged, and returns to detect whether the indoor unit A is started or not; when Q < Q1, it indicates that the energy storage battery 6 needs to be charged, at which time the first switch 9 is controlled to be turned on, waits for charging, and proceeds to S14.
S14: and detecting whether the sunlight intensity E meets a preset illumination intensity E2, wherein the preset illumination intensity E2 represents the illumination intensity when the solar panel 3 can sufficiently generate power.
The light intensity detection module 4 detects the current sunlight intensity E in real time, compares the current sunlight intensity E with the preset illumination intensity E2, and if E > = E2, it indicates that the solar panel battery 3 can generate enough power to charge the energy storage battery 6 through the first switch 9.
During this charging, S15 is executed.
If E < E2, it means that the solar cell 3 is not enough to generate electricity, if the energy storage battery 6 is continuously charged, the utility grid 1 is used for charging, which results in waste of electric energy, therefore, the control module 5 controls to turn off the first switch 9 and proceeds to S16.
And S15, detecting whether the indoor unit A is started in real time.
During the period when the solar cell set 3 is generating enough power to charge the energy storage battery 6, if the indoor unit a is turned on, in order to ensure that the solar cell set 3 preferentially supplies power to the indoor unit a, the control module 5 controls the first switch 9 to be turned off, and the process proceeds to S16. At this time, the solar panel battery pack 3 does not charge the energy storage battery 6 any more, and directly supplies power to the indoor unit a.
During the period that the solar panel battery pack 3 is sufficiently powered to charge the energy storage battery 6, if the indoor unit a is not started up all the time, the solar panel battery pack 3 continues to charge the energy storage battery 6, and the first switch 9 is turned off until the indoor unit a is fully powered, so that the situation that the service life of the indoor unit a is shortened due to continuous charging of the energy storage battery 6 after the energy storage battery 6 is fully powered is avoided, and then the indoor unit a is returned to be detected whether the indoor unit a is started up or not.
Wherein the full charge of the energy storage battery 6 may be preset to the second charge Q2.
S16: the number of charges, i.e., the number of charges n +1, is counted, and proceeds to S17.
S17: the first time T1 is delayed, and in T1, whether the indoor unit A is started or not is judged.
In T1, the first switch 9 is turned off, and if the indoor unit a is turned on at this time, the energy storage battery 6 enters the discharge control mode.
If the indoor unit a is not turned on at this time, the process proceeds to S18.
S18: judging whether the second time of the accumulated time delay is greater than or equal to the preset time T2, if the second time is less than T2, proceeding to S12, namely, continuing to judge whether the energy storage battery 6 is charged; if the second time is greater than or equal to T2, the control method returns to S11, and the energy storage battery 6 is enabled to enter the charging control mode again.
After the number of times N of pre-charging is reached due to E < E2, the energy storage battery 6 is no longer charged, which may be caused by time (night) or weather (cloudy day), and a preset time T2 is set for effectively utilizing solar energy, and the charging control mode is entered again after T2 to avoid that the battery life is affected due to the fact that the battery is in a power-shortage state for a long time after the electric quantity is exhausted.
To avoid the life of the energy storage battery 6 from being reduced due to frequent charging, T2 may be set to be larger, for example, 4 hours or longer.
[ discharge control mode of energy storage Battery ]
The working state of the indoor unit a, i.e., power on/off, can be obtained by the control module 5.
When the indoor unit A is started, the solar panel battery pack 3 is preferentially utilized to supply power to the indoor unit A when the sunlight intensity is sufficient, and the energy storage battery 6 and the commercial power grid 1 are not required to supply power.
When the indoor unit A is started, the sunlight intensity is insufficient, and the electric quantity of the energy storage battery 6 is sufficient, the energy storage battery 6 is used for supplying power to the indoor unit A.
Referring to fig. 3, a flowchart of the discharge control mode of the energy storage battery 6 when the indoor unit a is in the on state is described in detail.
S21: and judging whether the current sunlight intensity E is greater than or equal to a preset illumination intensity E1, wherein the preset illumination intensity E1 represents the illumination intensity when the solar panel 3 can generate power sufficiently.
The light intensity detection module 4 detects the current sunlight intensity E in real time, if E > = E1, it indicates that the solar panel battery 3 can generate enough power to supply power to the indoor unit a, and then returns to detect whether the indoor unit a is turned on.
If E < E1, it indicates that the solar cell group 3 is not enough to generate power and cannot supply power to the indoor unit a, and proceeds to S22.
S22: and judging whether the electric quantity of the energy storage battery 6 is less than a preset electric quantity Q3.
The electric quantity detection module 7 detects the electric quantity of the energy storage battery 6 in real time, compares the real-time electric quantity Q with a preset electric quantity Q3, indicates that the energy storage battery 6 is currently electrified when Q > = Q3, controls the second switch 10 to be switched on by the control module 5 at the moment, can utilize the energy storage battery 6 to supply power to the indoor unit a, and proceeds to S23.
S23: and detecting whether the electric quantity of the energy storage battery 6 is less than the preset electric quantity Q3 in real time during the power supply of the indoor unit A by the energy storage battery 6.
When the energy storage battery 6 supplies power to the indoor unit a, detecting whether the electric quantity of the energy storage battery 6 is smaller than a preset electric quantity Q3, until the electric quantity Q is smaller than Q3 or the indoor unit a is turned off, the control module 5 controls the second switch 10 to be switched off, stopping supplying power to the indoor unit a by the energy storage battery 6, and then returning to detect whether the indoor unit a is turned on.
The design is simple, when a mains supply power grid 1, a solar panel battery pack 3 and an energy storage battery 6 exist at the same time, when an indoor unit A is started, the solar panel battery pack 3 is preferentially adopted to supply power to the indoor unit A when the sunlight intensity is sufficient, when the indoor unit A is started and the sunlight intensity is weak, the solar band panel battery pack 3 is preferentially adopted to supply power preferentially, and finally, when the sunlight intensity is weak and the electric quantity of the energy storage battery 6 is insufficient, the mains supply power grid 1 is used for charging, so that the environment-friendly energy is effectively utilized, and the energy is saved; meanwhile, the problems that the service life of the energy storage battery 6 is shortened due to frequent charging of the energy storage battery 6 and the service life of the energy storage battery 6 is shortened due to long-time no-power are effectively solved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. The utility model provides a directly drive air conditioner, includes indoor set, its characterized in that still includes:
a utility grid that outputs alternating current;
an AC-DC conversion device that converts alternating current output from the utility grid into a first direct current power supply;
the anode of the first diode is connected with the output end of the first direct-current power supply, and the cathode of the first diode is connected with the power supply end of the indoor unit;
a new energy power generation device that outputs a second direct current power supply;
the energy power generation detection device is used for judging whether the new energy power generation device generates power normally;
the anode of the second diode is connected with the output end of the second direct-current power supply, and the cathode of the second diode is connected between the cathode of the first diode and the power supply end;
an energy storage battery that outputs a third direct current power supply;
the first change-over switch is connected to a charging circuit of the energy storage battery;
the electric quantity detection module is used for judging the electric quantity of the energy storage battery;
the second change-over switch is connected to a power supply circuit for supplying power to the indoor unit by the energy storage battery;
the control module is connected with the energy power generation detection device, the electric quantity detection module, the first change-over switch, the second change-over switch and the indoor unit;
the control module is configured to: when the indoor unit is not started, the energy storage battery is in a charging control mode; when the indoor unit is started, the energy storage battery is in a discharge control mode;
wherein the charging control mode is as follows: when the charging frequency of the energy storage battery is less than the pre-charging frequency and the charging is needed, controlling the working state of the first selector switch according to the feedback of the energy power generation detection device and the working state of the indoor unit;
the discharge control mode: controlling the working state of the second selector switch according to the feedback of the energy generation detection device, the real-time electric quantity of the energy storage battery and the working state of the indoor unit;
and the output voltages of the first direct current power supply, the second direct current power supply and the third direct current power supply are increased in sequence.
2. The direct drive air conditioner as set forth in claim 1,
when the charging times of the energy storage battery are less than the pre-charging times and the charging is needed, detecting whether a feedback result of the energy generation detection device is greater than or equal to a preset value;
if yes, continuously charging the energy storage battery until the energy storage battery is full of electricity and disconnecting the first change-over switch, wherein the working state of the indoor unit is detected in real time during the charging period;
if the indoor unit is started, the first change-over switch is switched off, and the charging times are counted at the same time;
if the indoor unit is not started, the energy storage battery is continuously charged until the indoor unit is full of electricity, and the first change-over switch is switched off;
if not, the first change-over switch is switched off, and the charging times are counted at the same time.
3. Direct drive air conditioner according to claim 1 or 2,
when the energy storage battery is in a charging control mode and the first change-over switch is turned off, delaying the turning-on of the first change-over switch for a first time, and detecting the working state of the indoor unit in real time during the first time;
if the indoor unit is started, entering the discharge control mode;
and if the indoor unit is not started, continuing to charge and judge the energy storage battery until the charging times reach the pre-charging times.
4. The direct drive air conditioner as set forth in claim 3,
when the charging times reach the pre-charging times, after delaying the first time, continuing delaying the second time, and judging whether the second time is more than or equal to the preset time;
if so, the energy storage battery reenters the charging control mode;
if not, continuing to charge and judge the energy storage battery until the charging times reach the pre-charging times.
5. The direct drive air conditioner as claimed in claim 4 wherein said second time is greater than or equal to 4 hours.
6. The direct drive air conditioner as recited in claim 1 further comprising:
a coil of the first relay is connected with the control module, and the first change-over switch is a normally open switch of the first relay;
and a coil of the second relay is connected with the control module, and the second change-over switch is a normally open switch of the second relay.
7. The direct-drive air conditioner as claimed in claim 1, wherein the new energy power generation device is a solar panel battery pack or a wind power generator.
8. The direct-drive air conditioner according to claim 1 or 7, wherein when the new energy power generation device is a solar panel battery pack, the energy power generation detection device is a light intensity detection module for detecting whether the sunlight intensity meets the requirement of normal power generation of the solar panel battery pack;
when the new energy power generation device is a wind driven generator, the energy power generation detection device is a wind power detection module and is used for detecting whether the wind power strength meets the requirement of normal power generation of the wind driven generator.
9. The direct-drive air conditioner as claimed in claim 1, wherein the first switch is turned off when the new energy power generation device supplies power to the indoor unit or when the commercial power grid supplies power to the indoor unit.
10. The direct drive air conditioner as recited in claim 1 further comprising:
a battery management unit connected between the first switch and the energy storage battery.
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