CN108592182B - Control circuit of indoor unit in air conditioner, control method of control circuit and air conditioner - Google Patents
Control circuit of indoor unit in air conditioner, control method of control circuit and air conditioner Download PDFInfo
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- CN108592182B CN108592182B CN201810264834.1A CN201810264834A CN108592182B CN 108592182 B CN108592182 B CN 108592182B CN 201810264834 A CN201810264834 A CN 201810264834A CN 108592182 B CN108592182 B CN 108592182B
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
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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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- Fuzzy Systems (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention discloses a control circuit of an indoor unit in an air conditioner, a control method of the control circuit and the air conditioner, relates to the technical field of air conditioners, and solves the problem that in the prior art, the appearance attractiveness of the whole air conditioner is affected because an air deflector cannot be reset and closed under the condition of power failure of the air conditioner. The specific scheme is as follows: after the air conditioner is started for one time, controlling the swing of the air deflector according to a control strategy of the air deflector in a normal power supply stage of the air conditioner; and periodically detecting a zero-crossing signal, and if the duration time of the zero-crossing signal is not detected to reach a threshold value, controlling the air deflector to be closed. The invention is used for the control process of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control circuit of an indoor unit in an air conditioner, a control method of the control circuit and the air conditioner.
Background
With the improvement of living standard of people, the air conditioner becomes a necessity in daily life. In order to better meet the requirements of users, the application of the air conditioner is more and more intelligent, and a comfortable indoor working or rest environment is provided for the users.
When the air conditioner is used, the situation of power failure (namely, disconnection from a mains supply) is inevitable, the position of the air deflector in the indoor unit is fixed at the position of the last moment of power failure due to the power failure of the air conditioner, the air outlet of the air conditioner is always in an open state, and the air outlet of the air conditioner cannot be closed until a new call is made. For the experience of the user, the appearance attractiveness of the whole air conditioner can be affected by the scene that the air outlet of the air conditioner is not closed after the power failure, and if the air conditioner is in an open state after the power failure, the air outlet is even mistakenly opened by the user, so that unnecessary trouble is brought to the user.
Disclosure of Invention
The embodiment of the invention provides a control circuit of an indoor unit in an air conditioner, a control method of the control circuit and the air conditioner, and solves the problem that in the prior art, the appearance attractiveness of the whole air conditioner is affected because an air deflector cannot be reset and closed under the condition of power failure of the air conditioner.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for controlling an air deflector of an indoor unit in an air conditioner, where the method includes: after the air conditioner is started up for one time, controlling the swing of the air deflector according to a control strategy of the air deflector in a normal power supply stage of the air conditioner; and periodically detecting a zero-crossing signal, and controlling the air deflector to be closed if the duration time of the zero-crossing signal is not detected to reach a threshold value.
The embodiment of the invention provides a control method of an air deflector of an indoor unit in an air conditioner, which is characterized in that under the condition of normal power supply of the air conditioner, the swing of the air deflector is controlled according to a control strategy of the air deflector in the normal power supply stage, meanwhile, a zero-crossing signal is periodically detected, and under the condition that the duration time of the zero-crossing signal is not detected to reach a threshold value, the air deflector is controlled to be closed. Compared with the prior art, the embodiment of the invention can rapidly judge whether the air conditioner is powered off by detecting whether the output of the zero-crossing signal is abnormal or not, thereby realizing that the swing of the air deflector is controlled according to the control strategy in the normal power supply stage when the power supply of the air conditioner is normal, and the closing of the air deflector is controlled according to the control strategy in the abnormal power supply stage when the power supply of the air conditioner is abnormal, perfecting the intelligent control of the air conditioner to a certain extent, controlling the air deflector to be immediately closed after the power off of the air conditioner, ensuring the attractive appearance of the whole air conditioner, and solving the problem that the attractive appearance of the whole air conditioner is influenced because the air deflector cannot be reset and closed under the condition of the power off of the air conditioner in the.
In a second aspect, an embodiment of the present invention provides a control module for an air deflector of an indoor unit in an air conditioner, where the control module includes a control unit and a detection unit, and the control unit is configured to control, after a power on of the air conditioner is performed for one time, a swing of the air deflector according to a control strategy of the air deflector in a normal power supply stage of the air conditioner; the detection unit is used for periodically detecting a zero-crossing signal; the control unit is further used for controlling the air deflector to be closed if the detection unit does not detect that the duration time of the zero-crossing signal reaches a threshold value.
In a third aspect, an embodiment of the present invention provides a control circuit for an indoor unit in an air conditioner, where the control circuit includes a power input circuit, a zero-crossing detection circuit, a control module, and an air deflector drive module. The power supply input circuit is used for inputting first alternating current, outputting second alternating current and direct current in the normal power supply stage of the air conditioner and storing electric energy, wherein the second alternating current is transmitted to the zero-crossing detection circuit, the direct current is used for supplying power to the control module and the air deflector driving module in the normal power supply stage of the air conditioner, and the stored electric energy is used for supplying power to the control module and the air deflector driving module in a time period after the air conditioner is powered off. The zero-crossing detection circuit is connected with the power input circuit and used for outputting a zero-crossing signal under the condition that the second alternating current output by the power input circuit crosses zero. The control module is used for sending an instruction for controlling the air deflector to swing to the air deflector driving module according to a control strategy of the air deflector in a normal power supply stage of the air conditioner after the air conditioner is started for one time; and periodically detecting a zero-crossing signal, and if the duration time of the zero-crossing signal is not detected to reach a threshold value, sending an instruction for controlling the air deflector to be closed to the air deflector driving module. And the air deflector driving module is used for controlling the swing of the air deflector according to the instruction received from the control module.
In a fourth aspect, an embodiment of the present invention provides an air conditioner, including the above control circuit.
The control module of the air deflector of the indoor unit in the air conditioner, the control circuit of the indoor unit in the air conditioner and the air conditioner comprising the control circuit can also achieve the effect, namely, whether the power failure condition of the air conditioner occurs or not can be rapidly judged by detecting whether the output of the zero-crossing signal is abnormal or not, so that the swinging of the air deflector is controlled according to the control strategy of the normal power supply stage when the power supply of the air conditioner is normal, the closing of the air deflector is controlled according to the control strategy of the abnormal power supply stage when the power supply of the air conditioner is abnormal, and the intelligent control of the air conditioner is perfected to a certain extent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view illustrating a method for controlling an air deflector of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for controlling an air deflector of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control module of an indoor unit in an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control circuit of an indoor unit in an air conditioner according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a power input circuit in the control circuit shown in FIG. 4;
fig. 6 is a schematic diagram of a control circuit of an air conditioning indoor unit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and the like are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", and the like are used to distinguish the same items or similar items with basically the same functions or actions, and those skilled in the art can understand that the words "first", "second", and the like do not limit the quantity and execution order.
The embodiment of the invention can be applied to any type of air conditioner, the air conditioner can be divided into a split type air conditioner, an integral type air conditioner (window air conditioner) and the like, and no matter which type of air conditioner is adopted, the part needing to be installed indoors is called an indoor unit. For example, the unitary air conditioner may be considered to include only indoor units; the split type air conditioner is an air conditioner including an indoor unit and an outdoor unit, and is classified into a wall-mounted air conditioner and a cabinet air conditioner according to the installation position of the indoor unit.
Example one
The embodiment of the present invention provides a method for controlling an air deflector of an indoor Unit in an air conditioner, where an execution main body of the method may be the air conditioner described above, or may be a control module used for controlling the swing of the air deflector in the air conditioner, and the control module may include a control board, for example, for a split-type air conditioner, a control board (also referred to as an indoor Unit main control board) in the indoor Unit, for example, a control board including a Micro Controller Unit (MCU). As shown in fig. 1, the method includes:
s101, after the air conditioner is started up for one time, controlling the swing of the air deflector according to a control strategy of the air deflector in a normal power supply stage of the air conditioner.
The control strategy of the normal power supply stage of the air conditioner is arranged in the air conditioner, and the air conditioner can execute the control logic for controlling the swing of the air deflector when being electrified, and an exemplary control strategy can comprise: under the condition that the air conditioner is powered on, when a user inputs a starting-up instruction (for example, the user presses or touches a switch key of the air conditioner and the like) to start the air conditioner, a control panel of the air conditioner can control the air deflector to be opened; when a user inputs a wind direction adjusting instruction (for example, the user selects a wind direction key on an air conditioner operation panel or a remote controller, and the user can also select an operation mode related to the wind direction, such as a person blowing mode or a person avoiding mode to blow towards the position of a person or to avoid the position of the person during blowing), the control panel can control the air deflector to swing according to the wind direction adjusting instruction, for example, the air deflector is fixed at a certain angle to blow air or the air deflector blows air in a free swing mode, and the like; when a user inputs a shutdown instruction (for example, presses or touches an on-off key of the air conditioner when the air conditioner is running), the control panel controls the air deflector to be closed.
It should be noted that, the air deflector in the embodiment of the present invention may be a part of an air deflector in an air conditioner, and when the air deflector is closed, the air deflector can seal an air outlet on an indoor unit of the air conditioner; when the air deflector is opened, the air outlet on the indoor unit of the air conditioner is correspondingly opened, and the swing angle or interval of the air deflector can determine the direction of air outlet. For example, for wall-mounted air conditioners and cabinet air conditioners, the horizontal air deflector may be provided on the indoor unit.
S102, periodically detecting a zero-crossing signal, and if the duration time of the zero-crossing signal is not detected to reach a threshold value, controlling the air deflector to be closed.
The zero-crossing signal is output by a zero-crossing detection circuit in the air conditioner indoor unit. The zero-crossing detection circuit has the following functions in the air conditioner: and when the zero crossing point of the alternating current is detected, the control panel controls the thyristor type elements to be conducted near the zero point of the alternating current so as to prevent the thyristor from being burnt out due to overlarge current at the moment of conduction. In the embodiment of the present invention, the control board may determine whether the air conditioner supplies power by periodically detecting whether the zero-crossing detection circuit outputs the zero-crossing signal, that is, if the zero-crossing signal is not detected and the duration of the zero-crossing signal is not detected reaches a threshold, for example, if the zero-crossing signal is not detected for a plurality of periods (for example, assuming that the detection period is 10ms and the plurality of periods is 5 periods, that is, 50ms), it is determined that the air conditioner supplies power abnormally; otherwise, the air conditioner is considered to be normally powered. Compared with the prior art, the embodiment of the invention can rapidly judge whether the air conditioner is powered off by detecting whether the output of the zero-crossing signal is abnormal, thereby realizing that the swing of the air deflector is controlled according to the control strategy in the normal power supply stage when the power supply of the air conditioner is normal, and the air deflector is controlled to be closed according to the control strategy in the abnormal power supply stage when the power supply of the air conditioner is abnormal, namely, the air deflector can be immediately closed after the power supply of the air conditioner is powered off, and the intelligent control of the air conditioner is realized to a certain extent without user intervention.
It should be noted that, after the air conditioner is powered off (the air conditioner is not connected to the commercial power), the control board detects whether the air conditioner is powered off, the control board sends out an instruction for controlling the air deflector to be closed after detecting the power off, and the driving module of the air deflector executes the instruction. Therefore, the air conditioner is required to be provided with a standby power supply, and the standby power supply can supply power to the control panel and the driving module of the air deflector after the air conditioner is powered off so as to close the air deflector; the standby power supply can store electric energy under the normal power supply condition and discharge electricity when the air conditioner is powered off.
The zero-crossing signal may be detected periodically, for example, every 10ms (i.e., the detection period is 10ms), and if the zero-crossing signal is not detected and the duration of the zero-crossing signal is not detected reaches a predetermined threshold, the air deflector is controlled to be closed. The reaching of the predetermined threshold may refer to being greater than or equal to a predetermined threshold. The threshold may be a preset value larger than the detection period, and optionally, the threshold may be a multiple of the detection period. The detecting step may specifically compare the recorded duration of the undetected zero-crossing signal with a time threshold, or may compare the recorded period of the undetected zero-crossing signal with a period threshold.
As an alternative, the controlling the swing of the air deflector according to the control strategy of the air deflector in the normal phase of the power supply of the air conditioner includes: the air deflector is controlled to be opened to a memorized swinging angle or interval.
The memory swing angle refers to a swing angle of the air guide plate before the air conditioner is closed last time, and includes an angle of the air guide plate when the air conditioner supplies air at a fixed angle (referred to as a static angle for short) and an angle of the air guide plate when the air conditioner stops due to power failure under the condition of supplying air at a variable angle (referred to as a dynamic angle for short). It should be noted that the angle is not limited to a mathematical angle, and the damper may be guided to a specific position (for example, a segment) within the swing range (for example, the swing range may be divided into 7 segments).
That is, when the air conditioner is powered on for the last time when the front air deflector is closed and air is supplied at a static angle, the air deflector is controlled to be opened to the static angle after the air conditioner is powered on. For example, if the air conditioner is set at a certain position for air supply at a fixed angle when the air conditioner is closed last time, the control panel controls the air deflector to be automatically opened to the certain position when the air conditioner is started again after being powered on, and air supply is continued at the fixed angle.
And/or when the air conditioner is powered on for the last time when the front air deflector is closed and air is supplied at a dynamic angle, controlling the air deflector to be opened to a position (for example, the 5 th section) where the air deflector stops when the air conditioner is powered off; further, exemplarily, after the air deflector reaches the position, the air deflector continues to supply air at a dynamic angle by taking the position as a starting point; or the air guide plate stops after reaching the position, air is supplied in a static angle, and further the air guide plate can be manually set by a user.
The memory swing interval refers to an interval in which the air deflector swings when the air conditioner blows air at a variable angle, and for example, when the air conditioner is turned off last time and the front air deflector swings repeatedly within the maximum swing range of the air conditioner, and the air deflector is turned on again after the air conditioner is powered on, the air deflector automatically opens and continues to swing repeatedly within the maximum swing range of the air conditioner. Further, as an optional scheme, when the air conditioner is turned off last time and the front air deflector swings repeatedly within a certain swing interval of the maximum swing range of the air conditioner, when the air conditioner is turned on again, the air deflector automatically opens and continues to swing repeatedly within the swing interval of the maximum swing range of the air conditioner.
Compared with the prior art, the air conditioner control method and the air conditioner control device can control the air deflector to be opened to the swing angle or interval memorized after the air conditioner is powered on, user intervention is not needed, and intelligent control of the air conditioner is achieved to a certain extent.
As an optional scheme, the method for controlling the air deflector of the indoor unit in the air conditioner further comprises the following steps: if the duration time of the zero-crossing signal is not detected to reach the threshold value, the current swing angle or interval of the air deflector is recorded, and therefore the current swing angle or interval of the air deflector can be used as the memory swing angle or interval after the air conditioner is started next time. For example, the control module of the indoor unit may include a storage unit, and in the case that the duration of the zero-crossing signal is not detected to reach the threshold, the storage unit may record the current swing angle or interval of the air deflector. For example, when the duration of the zero-crossing signal is not detected to reach the threshold, the current swing angle or interval of the air deflector may be recorded first, and then the air deflector is controlled to be closed, and of course, the current swing angle or interval of the air deflector may also be recorded and the air deflector is controlled to be closed at the same time. Compared with the prior art, the embodiment of the invention records the current swing angle or interval of the air deflector as the memory swing angle or interval after the next air conditioner is started under the condition of judging that the power supply of the air conditioner is abnormal, so that the user does not need to set the swing angle or interval after the power supply of the air conditioner is normal and enters the running state, convenience is provided for the user, and the use experience of the user is improved.
Step S102 is performed simultaneously with step S101, and there is no chronological order between the two steps.
Referring to fig. 2, a flowchart of a method for controlling an air deflector of an indoor unit of an air conditioner according to an embodiment of the present invention is generally described.
S201, starting the air conditioner and entering an operation state.
S202, controlling the swing of the air deflector according to a control strategy of the air deflector in the normal power supply stage of the air conditioner.
Wherein, controlling the swing of the air deflector may include: the air deflector is controlled to be opened to a memorized swinging angle or interval. That is, when the air conditioner is powered on for the last time when the front air deflector is closed and air is supplied at a static angle, the air deflector is controlled to be opened to the static angle after the air conditioner is powered on; or when the air conditioner is powered on last time when the front air deflector is closed and air is supplied in a dynamic interval, the air deflector is controlled to be opened to the interval of closing the swing of the front air deflector.
And S203, periodically detecting the zero-crossing signal so as to judge whether the power supply of the air conditioner is abnormal. Step S203 and step S202 may be performed simultaneously, and there is no chronological order between them.
S204, judging whether the duration time of the undetected zero-crossing signal reaches a threshold value, if so, executing S205; otherwise, return to S203.
And S205, optionally, recording the current swing angle or interval of the air deflector. And recording the current swing angle or interval of the air deflector as a memory swing angle or interval after the next air conditioner is started. And the air conditioner is started again after being electrified, and the air conditioner is automatically started to memorize the swing angle or interval.
And S206, controlling the air deflector to be closed. If the duration of the non-zero crossing signal is detected to reach a threshold value (e.g. 5 cycles, i.e. 50ms), the air deflector is controlled to close.
Step S205 and step S206 may be performed simultaneously or sequentially, which is not specifically limited in this embodiment of the present invention.
The embodiment of the invention provides a control method of an air deflector of an indoor unit in an air conditioner, which is characterized in that under the condition of normal power supply of the air conditioner, the swing of the air deflector is controlled according to a control strategy of the air deflector in the normal power supply stage, meanwhile, a zero-crossing signal is periodically detected, and under the condition that the duration time of the zero-crossing signal is not detected to reach a threshold value, the air deflector is controlled to be closed. Compared with the prior art, the embodiment of the invention can rapidly judge whether the air conditioner is powered off by detecting whether the output of the zero-crossing signal is abnormal or not, thereby realizing that the swing of the air deflector is controlled according to the control strategy in the normal power supply stage when the power supply of the air conditioner is normal, and the closing of the air deflector is controlled according to the control strategy in the abnormal power supply stage when the power supply of the air conditioner is abnormal, perfecting the intelligent control of the air conditioner to a certain extent, controlling the air deflector to be immediately closed after the power off of the air conditioner, ensuring the attractive appearance of the whole air conditioner, and solving the problem that the attractive appearance of the whole air conditioner is influenced because the air deflector cannot be reset and closed under the condition of the power off of the air conditioner in the.
Example two
Referring to fig. 3, the embodiment of the invention provides a control module 13 for an air deflector of an indoor unit of an air conditioner, and the control module 13 comprises a control unit 131 and a detection unit 132.
The control unit 131 is configured to control the swing of the air deflector according to a control strategy of the air deflector in a normal power supply stage of the air conditioner after the air conditioner is powered on for one time. The detection unit 132 is used to periodically detect the zero crossing signal. The control unit 131 is further configured to control the air deflector to be closed if the detection unit 132 does not detect that the duration of the zero-crossing signal reaches the threshold value.
As an alternative, the control unit 131 is further configured to control the air deflector to open to the memory swing angle or interval.
As an optional scheme, the control unit 131 is further configured to record a current swing angle or interval of the air deflector if the detection unit 132 does not detect that the duration of the zero-crossing signal reaches the threshold, where the current swing angle or interval of the air deflector is used as a memory swing angle or interval after the next air conditioner is turned on. For example, as shown in fig. 3, the control module 13 further includes a storage unit 133, and when the detection unit 132 does not detect that the duration time of the zero-crossing signal reaches the threshold, the storage unit 133 records the current swing angle or interval of the air deflector, so that the control unit 131 controls the air deflector to open to the memory swing angle or interval after the air conditioner is powered on.
The embodiment of the invention provides a control module of an air deflector of an indoor unit in an air conditioner, which comprises a control unit and a detection unit, wherein the control unit controls the swing of the air deflector according to a control strategy of the air deflector in a normal power supply stage under the condition of normal power supply of the air conditioner, meanwhile, the detection unit periodically detects a zero-crossing signal, and the control unit controls the air deflector to be closed under the condition that the detection unit does not detect that the duration time of the zero-crossing signal reaches a threshold value. Compared with the prior art, the embodiment of the invention can rapidly judge whether the air conditioner is powered off by detecting whether the output of the zero-crossing signal is abnormal or not, thereby realizing that the swing of the air deflector is controlled according to the control strategy in the normal power supply stage when the power supply of the air conditioner is normal, and the closing of the air deflector is controlled according to the control strategy in the abnormal power supply stage when the power supply of the air conditioner is abnormal, perfecting the intelligent control of the air conditioner to a certain extent, controlling the air deflector to be immediately closed after the power off of the air conditioner, ensuring the attractive appearance of the whole air conditioner, and solving the problem that the attractive appearance of the whole air conditioner is influenced because the air deflector cannot be reset and closed under the condition of the power off of the air conditioner in the.
EXAMPLE III
Referring to fig. 4, an embodiment of the present invention provides a control circuit 1 for an indoor unit in an air conditioner, where the control circuit 1 includes a power input circuit 11, a zero-crossing detection circuit 12, a control module 13, and an air deflector driving module 14.
The power input circuit 11 is used for inputting a first alternating current (mains supply, 220V50Hz) in a normal phase of the air conditioner power supply, outputting a second alternating current obtained through anti-interference processing, and outputting a direct current (for example, 310V) obtained through anti-interference and rectification processing, and storing electric energy. Wherein, the second alternating current is transmitted to the zero-crossing detection circuit 12, so that the zero-crossing detection circuit 12 outputs a zero-crossing signal; the direct current is used for supplying power to the control module 13 and the air deflector driving module 14 in the normal power supply stage of the air conditioner; the stored electric energy is used for supplying power to the control module 13 and the air deflector driving module 14 in a time period after the air conditioner is powered off. For example, when the air conditioner is powered on and operated, the power input circuit 11 will input a first alternating current, and then output a second alternating current and a direct current, and store electric energy (for example, store electric energy by using a capacitor), and once the air conditioner is powered off, the power input circuit 11 will not input the first alternating current, and then will not output the second alternating current and the direct current, and further the zero-crossing detection circuit 12 will not output a zero-crossing signal without inputting the second alternating current, and the electric energy stored by the capacitor will release electric energy immediately after the air conditioner is powered off, and power can be supplied to the control module and the air deflector driving module within a time period after the power off (the time period depends on the amount of stored electric energy, for example, 30s), so that the control module and the air deflector driving module can work normally, and cooperate with each other to control the air deflector to.
As an alternative, referring to fig. 5, the power input circuit 11 may include an anti-jamming circuit 111, a rectifying circuit 112 and a capacitance module 113. The interference rejection circuit 111 may be configured to filter an interference signal in the first ac power to obtain a second ac power. The rectifier circuit 112 may convert the first alternating current to a direct current, and the rectifier circuit 112 may include an alternating current input and a direct current output. The ac input terminal of the rectifying circuit 112 is connected to the immunity circuit 111, and is used for inputting the second ac power output by the immunity circuit 111. The dc output end of the rectifying circuit 112 is configured to output a dc current obtained by rectifying the second ac current, so as to supply power to the control module 13 and the air deflector driving module 14. Two ends of the capacitor module 113 are respectively connected with the dc output end of the rectifying circuit 112, so that the capacitor module 113 can store electric energy when the air conditioner is powered on and release electric energy when the air conditioner is powered off.
Alternatively, the capacitance of the capacitor module 113 is in the range of 160 μ F to 270 μ F. Illustratively, the capacitance of the capacitance module 113 (e.g., capacitor) is 160 μ F/450V, wherein the capacitance of 160 μ F/450V means that the amount of charge added to increase the voltage between the two plates of the capacitor by 1V is 16 × 10-5C; the maximum voltage that the capacitor can withstand is 450V. Compared with the prior art, the capacitance of the capacitor module 113 behind the rectifying circuit 112 is increased in the embodiment of the application, so that the capacitance of the capacitor module can be increasedThe capacitor module 113 can supply power to the control module 13 and the air deflector driving module 14 in a period of time after the air conditioner is powered off, so that the air deflector is controlled to be closed. It should be noted that the capacitance of the capacitor module 113 can be selectively increased according to different requirements for closing the air-conditioning air deflector.
In the control circuit 1, the zero-cross detection circuit 12 is connected to the power input circuit 11, receives the second alternating current output by the power input circuit 11 in the case that the air conditioner is normally powered, and outputs a zero-cross signal in the case that the second alternating current crosses zero. In the embodiment of the invention, whether the air conditioner power supply is abnormal is judged by detecting whether the output of the zero-crossing signal is normal, that is, if the duration time of the zero-crossing signal is not detected to reach a threshold (namely, a preset time period), the air conditioner power supply can be determined to be abnormal.
In the control circuit 1, the control module 13 is used for a) sending an instruction for controlling the swing of the air deflector to the air deflector driving module 14 according to the control strategy of the air deflector in the normal power supply stage of the air conditioner after the air conditioner is started up for one time; and b) periodically detecting a zero-crossing signal, and if the duration of the zero-crossing signal is not detected to reach a threshold value, sending an instruction for controlling the air deflector to be closed to the air deflector driving module 14. It should be noted that a) and b) may be performed simultaneously, and there is no chronological order between them.
In the control circuit 1, the air deflector drive module 14 is configured to control the swing of the air deflector according to a command received from the control module 13. For example, when the air guiding plate driving module 14 receives a command for controlling the air guiding plate to swing from the control module 13, the air guiding plate driving module 14 controls the air guiding plate to swing according to the command. For another example, when the air guiding plate driving module 14 receives a command for controlling the air guiding plate to close from the control module 13, the air guiding plate driving module 14 controls the air guiding plate to close according to the command.
Fig. 6 is a schematic diagram of a control circuit of an air conditioning indoor unit according to an embodiment of the present invention, in which an example of the power input circuit 11 and the zero-cross detection circuit 12 is shown. Referring to fig. 6, as seen from the left side of the figure, a live line X201 and a zero line X202 of an ac power grid are connected to a power input circuit 11, 220V50Hz mains supply (i.e., first ac power) is added to an anti-interference circuit 111 composed of a capacitor C202, resistors RV201 and RT201, and a mutual inductance filter L202 through a 5A/250V protective tube FU201, so as to filter noise interference in the first ac power and prevent interference generated by an air conditioner from flowing into the ac power grid, thereby obtaining filtered second ac power. A part of the second alternating current is rectified by the rectifying circuit 112 (e.g., the rectifying bridge VC220), and a direct current of 310V is obtained at a direct current output terminal of the rectifying circuit 112.
Wherein, the mathematical expression of the alternating current is:
the effective value U of the alternating current is 220V, which is related to the peak value Um of the alternating current by: and U is 0.707 Um. It can be seen that the peak Um of the 220V ac power is 1.414 × 220 ≈ 310V.
Two ends of the capacitor module 113 (i.e. the capacitor C221 in fig. 6) are respectively connected to the dc output terminals of the rectifying circuit 112, that is, the second ac power is rectified and filtered by the capacitor C221. In the absence of load current, the capacitor is charged to a peak voltage Um, which is 310V.
The 310V dc is further regulated to +12V dc by the switching power supply circuit IC4 (not shown in fig. 6), so as to provide an operating voltage for the air deflector driving circuit 14 (for example, including a reverse driver, an air deflector motor, a relay, and other circuits, not shown in fig. 6); meanwhile, the 310V dc power is further regulated to +5V by the switching power supply circuit IC5 (not shown in fig. 6) to provide an operating voltage for the control module 13 (e.g., MCU, not shown in fig. 6).
Further, another part of the second alternating current flows into the zero-cross detection circuit 12 via the diodes V510 and V511. In the zero-cross detection circuit 12, the diodes V510 and V511 rectify (e.g., half-wave rectify) the second ac power, and then transmit zero-cross signals (e.g., sine wave zero-cross signals) of the zero line and the live line to the control module 13 (not shown in fig. 6) through the switching power supply circuit B510, the transistor V514, and the like.
The embodiment of the invention provides a control circuit of an indoor unit in an air conditioner, which comprises a power supply input circuit, a zero-crossing detection circuit, a control module and an air deflector driving module, wherein the control module controls the swing of an air deflector according to a control strategy of the air deflector in a normal power supply stage under the condition of normal power supply of the air conditioner, and meanwhile, periodically detects a zero-crossing signal, and controls the air deflector to be closed under the condition that the duration time of the zero-crossing signal is not detected to reach a threshold value. Compared with the prior art, the embodiment of the invention can rapidly judge whether the air conditioner is powered off by detecting whether the output of the zero-crossing signal is abnormal or not, thereby realizing that the swing of the air deflector is controlled according to the control strategy in the normal power supply stage when the power supply of the air conditioner is normal, and the closing of the air deflector is controlled according to the control strategy in the abnormal power supply stage when the power supply of the air conditioner is abnormal, perfecting the intelligent control of the air conditioner to a certain extent, controlling the air deflector to be immediately closed after the power off of the air conditioner, ensuring the attractive appearance of the whole air conditioner, and solving the problem that the attractive appearance of the whole air conditioner is influenced because the air deflector cannot be reset and closed under the condition of the power off of the air conditioner in the.
Example four
The embodiment of the invention provides an air conditioner, which comprises the control circuit.
It should be noted that, the functional descriptions of the functional modules related to the product embodiments can be cited in the corresponding steps, and are not described herein again.
The above-described embodiments of the apparatus (or system) are merely illustrative, and for example, the division of the units (or modules) is only one logical division, and there may be other divisions when the actual implementation is performed, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units (or modules) described as separate parts may or may not be physically separate, for example, functional units in various embodiments of the present invention may be integrated in one physical unit, may be distributed in different physical units, or may be integrated in one physical unit by two or more units; it is also possible that one functional unit is implemented by two or more physical units in cooperation. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: 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 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A control method of an air deflector of an indoor unit in an air conditioner is characterized by comprising the following steps:
after the air conditioner is started up for one time, controlling the swing of the air deflector according to a control strategy of the air deflector in a normal power supply stage of the air conditioner;
and periodically detecting a zero-crossing signal, and controlling the air deflector to be closed if the duration time of the zero-crossing signal is not detected to reach a threshold value.
2. The control method according to claim 1,
the controlling the swing of the air deflector according to the control strategy of the air deflector in the normal power supply stage of the air conditioner comprises the following steps: and controlling the air deflector to be opened until the swinging angle or interval is memorized.
3. The control method according to claim 1 or 2,
the method further comprises the following steps: if the duration time of the zero-crossing signal is not detected to reach the threshold value, recording the current swing angle or interval of the air deflector, and taking the current swing angle or interval of the air deflector as the memory swing angle or interval after the air conditioner is started next time.
4. A control module of an air deflector of an indoor unit in an air conditioner is characterized by comprising:
the control unit is used for controlling the swing of the air deflector according to a control strategy of the air deflector in a normal power supply stage of the air conditioner after the air conditioner is started for one time;
a detection unit for periodically detecting a zero-crossing signal;
the control unit is further used for controlling the air deflector to be closed if the detection unit does not detect that the duration time of the zero-crossing signal reaches a threshold value.
5. The control module of claim 4,
the control unit is also used for controlling the air deflector to be opened to a memorized swinging angle or interval.
6. The control module of claim 4 or 5,
the control module further comprises a storage unit, wherein the storage unit is used for recording the current swing angle or interval of the air deflector if the detection unit does not detect that the duration time of the zero-crossing signal reaches a threshold value, and the current swing angle or interval of the air deflector is used as the memory swing angle or interval after the air conditioner is started next time.
7. A control circuit of an indoor unit in an air conditioner, the control circuit comprising:
the air conditioner comprises a power input circuit, a zero-crossing detection circuit, a control module, an air deflector driving module and a power output circuit, wherein the power input circuit is used for inputting first alternating current, outputting second alternating current and direct current and storing electric energy in a normal air conditioner power supply stage, the second alternating current is transmitted to the zero-crossing detection circuit, the direct current is used for supplying power to the control module and the air deflector driving module in the normal air conditioner power supply stage, and the stored electric energy is used for supplying power to the control module and the air deflector driving module in a time period after the air conditioner is powered off;
the zero-crossing detection circuit is connected with the power input circuit and is used for outputting a zero-crossing signal under the condition that the second alternating current output by the power input circuit crosses zero;
the control module is used for sending an instruction for controlling the air deflector to swing to the air deflector driving module according to a control strategy of the air deflector in a normal power supply stage of the air conditioner after the air conditioner is started for one time; periodically detecting a zero-crossing signal, and if the duration time of the zero-crossing signal is not detected to reach a threshold value, sending an instruction for controlling the air deflector to be closed to the air deflector driving module;
and the air deflector driving module is used for controlling the swing of the air deflector according to the instruction received from the control module.
8. The control circuit of claim 7, wherein the power input circuit comprises:
the anti-interference circuit is used for filtering an interference signal in the input first alternating current to obtain a second alternating current;
the alternating current input end of the rectifying circuit is connected with the anti-jamming circuit and used for inputting second alternating current output by the anti-jamming circuit, and the direct current output end of the rectifying circuit is used for outputting direct current obtained by rectifying the second alternating current;
and two ends of the capacitor module are respectively connected with the direct current output end of the rectifying circuit.
9. The control circuit of claim 8,
the capacitance of the capacitor module is in the range of 160 muF to 270 muF.
10. An air conditioner, comprising: a control circuit according to any of claims 7 to 9.
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| CN110986337A (en) * | 2019-12-06 | 2020-04-10 | 珠海格力电器股份有限公司 | Electric appliance reset control method and device and electric appliance |
| CN113391572A (en) * | 2020-03-12 | 2021-09-14 | 浙江苏泊尔家电制造有限公司 | Control method and control circuit for cooking appliance and cooking appliance |
| CN112019009A (en) * | 2020-08-31 | 2020-12-01 | 广东美的暖通设备有限公司 | System abnormal operation processing method, processing device and computer readable storage medium |
| CN112161394A (en) * | 2020-09-02 | 2021-01-01 | 四川虹美智能科技有限公司 | Control method, device and system for air conditioner air door motor |
| CN112146159B (en) * | 2020-09-22 | 2022-02-25 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
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| CN104425184A (en) * | 2013-08-23 | 2015-03-18 | 海尔集团公司 | Control device for switching on and switching off relay and air conditioner |
| JP6488932B2 (en) * | 2015-07-28 | 2019-03-27 | 株式会社富士通ゼネラル | Air conditioner |
| CN106403142B (en) * | 2015-07-31 | 2019-05-24 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system indoor unit abnormal power-down guard method |
| CN205316586U (en) * | 2015-11-04 | 2016-06-15 | 潍坊孟力新能源科技有限公司 | Air conditioner circuit system |
| CN107345706A (en) * | 2017-06-09 | 2017-11-14 | 宁波奥克斯电气股份有限公司 | The control method of the initial opening angle of wind guide strip when air conditioner is started shooting |
| CN107461889A (en) * | 2017-08-04 | 2017-12-12 | 广东美的制冷设备有限公司 | The control method and storage medium of air conditioner, air conditioner |
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Address after: 528303 No. 8, Rong Gang Road, Ronggui street, Shunde District, Foshan, Guangdong. Applicant after: Haixin Home Appliances Group Co., Ltd. Applicant after: Hisense (Guangdong) Air Conditioner Co., Ltd. Address before: 528303 No. 8, Rong Gang Road, Ronggui street, Shunde District, Foshan, Guangdong. Applicant before: Hisense Kelon Electrical Holdings Co., Ltd. Applicant before: Hisense (Guangdong) Air Conditioner Co., Ltd. |
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