CN112611039A - Air conditioner and control method - Google Patents

Air conditioner and control method Download PDF

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Publication number
CN112611039A
CN112611039A CN202011476632.7A CN202011476632A CN112611039A CN 112611039 A CN112611039 A CN 112611039A CN 202011476632 A CN202011476632 A CN 202011476632A CN 112611039 A CN112611039 A CN 112611039A
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China
Prior art keywords
fan motor
steering
target fan
current value
heat exchanger
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Pending
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CN202011476632.7A
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Chinese (zh)
Inventor
刘朋
单烁
马晓雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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Priority to CN202011476632.7A priority Critical patent/CN112611039A/en
Publication of CN112611039A publication Critical patent/CN112611039A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner and a control method, wherein a controller of the air conditioner is configured to: when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor; determining a rotation direction of the target fan motor according to the current value; if the steering is wrong steering, the target fan motor is stopped, and the target fan motor is restarted based on the excitation sequence opposite to the current excitation sequence after delaying for a first preset time, so that the steering of the centrifugal fan motor can be adaptively adjusted, and the material universality is realized.

Description

Air conditioner and control method
Technical Field
The present disclosure relates to the field of air conditioner control, and more particularly, to an air conditioner and a control method.
Background
In the total heat exchanger, the problems of indoor dirty air discharge and outdoor fresh air suction can be solved by a mode of double-end shaft output of a single motor, and can also be independently controlled by two independent fan motors. The two fan motors are independently controlled, so that the combination of various operation modes such as unidirectional flow, bidirectional flow and the like can be realized, and micro-positive pressure control is realized, and the fan has great advantages.
However, for the universality of the centrifugal fan, the motor bracket, the volute air duct and the like, the two independent fan motors need to rotate in opposite directions, one motor needs to rotate clockwise CW, the other motor needs to rotate counterclockwise CCW, and the flow direction of wind needs to be changed.
Therefore, how to provide an air conditioner capable of realizing material universality of two centrifugal fan motors, a controller and the like in a total heat exchanger is a technical problem to be solved at present.
Disclosure of Invention
The invention provides an air conditioner, which is used for solving the technical problem that two centrifugal fan motors, a controller and the like in a total heat exchanger in the prior art cannot realize material universality.
The air conditioner includes:
a refrigerant circulation loop, which circulates the refrigerant in a loop composed of a compressor, a condenser, an expansion valve, an evaporator and a four-way valve;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates as a condenser and the other operates as an evaporator;
the total heat exchanger is used for providing outdoor fresh air to the indoor space through the first centrifugal fan and discharging indoor dirty air to the outdoor space through the second centrifugal fan;
the controller is configured to include:
when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor;
determining a rotation direction of the target fan motor according to the current value;
and if the steering is wrong steering, stopping the target fan motor, and restarting the target fan motor based on an excitation sequence opposite to the current excitation sequence after delaying for a first preset time.
In some embodiments of the present application, the control appliance is configured to:
if the current value is smaller than a first set value, determining that the steering is wrong steering;
and if the current value is not less than a second set value, determining that the steering is correct steering.
In some embodiments of the present application, the second set value is a current value of the centrifugal fan motor which is correctly rotated and is obtained through a preset test at the preset lowest rotation speed, and the second set value is greater than the first set value.
In some embodiments of the present application, the controller is further configured to:
and if the steering is correct steering, storing the current excitation sequence of the target fan motor.
In some embodiments of the present application, the current value is obtained by delaying a second preset time period after the target fan motor is started.
Correspondingly, the invention also provides a control method of the air conditioner, the method is applied to the air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a total heat exchanger and a controller, and the method comprises the following steps:
when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor;
determining a rotation direction of the target fan motor according to the current value;
and if the steering is wrong steering, stopping the target fan motor, and restarting the target fan motor based on an excitation sequence opposite to the current excitation sequence after delaying for a first preset time.
In some embodiments of the present application, determining the rotation direction of the target fan motor according to the current value specifically includes:
if the current value is smaller than a first set value, determining that the steering is wrong steering;
and if the current value is not less than a second set value, determining that the steering is correct steering.
In some embodiments of the present application, the second set value is a current value of the centrifugal fan motor which is correctly rotated and is obtained through a preset test at the preset lowest rotation speed, and the second set value is greater than the first set value.
In some embodiments of the present application, after determining the steering of the target fan motor from the current value, the method further comprises:
and if the steering is correct steering, storing the current excitation sequence of the target fan motor.
In some embodiments of the present application, the current value is obtained by delaying a second preset time period after the target fan motor is started.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses an air conditioner and a control method, wherein a controller of the air conditioner is configured to: when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor; determining a rotation direction of the target fan motor according to the current value; if the steering is wrong steering, the target fan motor is stopped, and the target fan motor is restarted based on the excitation sequence opposite to the current excitation sequence after delaying for a first preset time, so that the steering of the centrifugal fan motor can be adaptively adjusted, and the material universality is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view illustrating the inner air duct of the total heat exchanger and the motor turning direction and the wind field flow direction under the correct turning direction in the embodiment of the invention;
FIG. 2 is a schematic view showing the inner air ducts of the total heat exchanger and the motor turning direction and the wind field flow direction under the misturning condition in the embodiment of the invention;
fig. 3 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
The indoor fan generates an air flow of indoor air through the indoor heat exchanger to promote heat exchange between the refrigerant flowing in the heat transfer tubes and the indoor air. The indoor fan is driven by an indoor fan motor capable of changing the rotation speed.
The air conditioner in the embodiment further comprises a total heat exchanger which comprises two centrifugal fans, outdoor fresh air is provided indoors through the first centrifugal fan, and indoor dirty air is discharged outdoors through the second centrifugal fan.
The controller is configured to include:
when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor;
determining a rotation direction of the target fan motor according to the current value;
and if the steering is wrong steering, stopping the target fan motor, and restarting the target fan motor based on an excitation sequence opposite to the current excitation sequence after delaying for a first preset time.
In this embodiment, when a user needs to start the total heat exchanger, the user sends a start instruction to the controller through a remote controller or other control terminal, where the start instruction may be a start instruction for starting the total heat exchanger for the first time. The rotating speeds of the first centrifugal fan motor and the second centrifugal fan motor can be adjusted, and the controller starts a corresponding target fan motor in the total heat exchanger according to a starting instruction and a preset lowest rotating speed, wherein the target fan motor can be a single fan motor or two fan motors. The current value of the target fan motor is acquired, and then the rotation direction of the target fan motor can be determined based on the current value.
If the steering is wrong steering, the target fan motor needs to be stopped, the excitation sequence is output in the opposite direction after the first preset time (such as 0.5S) is delayed, and the target fan motor is restarted, so that the self-adaptive adjustment of the steering of the fan motor is realized. The process of changing the excitation sequence will be apparent to those skilled in the art and will not be described in detail herein.
In order to improve reliability, in a preferred embodiment of the present application, the current value is obtained by delaying a second preset time period after the target fan motor is started.
Because the current value may be unstable after the centrifugal fan motor is started, the current value of the target fan motor is obtained after the target fan motor is stably operated by delaying for a second preset time (for example, 5 s).
To accurately determine the direction of rotation of the target fan motor, in some embodiments of the present application, the controller is configured to:
if the current value is smaller than a first set value, determining that the steering is wrong steering;
and if the current value is not less than a second set value, determining that the steering is correct steering.
In this embodiment, the current value is compared with the first set value or the second set value, and if the current value is smaller than the first set value, it indicates that the target fan motor cannot reach a sufficient load, and the steering is an erroneous steering; if the current value is not less than the second set value, the target fan motor reaches the normal load, and the steering is the correct steering.
The first setting value and the second setting value can be flexibly set by those skilled in the art according to actual needs, which does not affect the scope of protection of the present application.
In order to accurately determine the rotation direction of the target fan motor, in some embodiments of the present application, the second set value is a current value of the centrifugal fan motor, which is obtained through a preset test and rotates correctly, at the preset lowest rotation speed, and the second set value is greater than the first set value.
In order to further improve the accuracy of the steering determination, the first set value is 50% of the second set value.
In order to start in the correct direction of rotation the next time the centrifugal fan motor is started, in a preferred embodiment of the present application, the controller is further configured to:
and if the steering is correct steering, storing the current excitation sequence of the target fan motor.
In this embodiment, if the direction is correct, the current excitation sequence of the target fan motor is stored, for example, in an electrically erasable programmable read only memory, and the centrifugal fan motor may be automatically started in the correct direction when the centrifugal fan motor is started next time.
In order to facilitate the steering adjustment, in a preferred embodiment of the present application, the motors of the first centrifugal fan and the second centrifugal fan are externally-arranged driving dc motors.
By applying the above technical solution, in an air conditioner including a refrigerant circulation circuit, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a total heat exchanger, and a controller, the controller is configured to: when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor; determining a rotation direction of the target fan motor according to the current value; if the steering is wrong steering, the target fan motor is stopped, and the target fan motor is restarted based on the excitation sequence opposite to the current excitation sequence after delaying for a first preset time, so that the steering of the centrifugal fan motor can be adaptively adjusted, and the material universality is realized.
In order to further illustrate the technical idea of the present invention, the technical solution of the present invention will now be described with reference to specific application scenarios.
The working principle of the centrifugal fan is as follows: an effective air duct is arranged in the tangential direction of the fan blades of the centrifugal fan and the tangential direction in front of the rotating direction of the fan to conduct wind direction diversion, so that a stable wind field can be formed, and therefore the fan motor has stable load output.
As shown in figure 1, the dirty air of the motor is discharged, the motor rotates clockwise CW, the fresh air is sucked into the motor and rotates anticlockwise CCW, and the flow direction of the two wind fields is changed on the premise that the centrifugal fan, the motor bracket and the volute air channel are universal. Stable high pressure area and negative pressure area can be formed in the central area of the volute air duct and the centrifugal fan, so that a stable wind flow field is formed.
If the centrifugal fan rotates reversely, because no effective air duct exists, a concentrated high-pressure area cannot be formed to discharge the air, that is, a stable wind field with a large flow rate cannot be formed, so that the load of the motor is much smaller than normal, as shown in fig. 2.
An embodiment of the present invention provides a control method of an air conditioner, as shown in fig. 3, including the following steps:
step S301 starts.
Before starting, testing the load parameters such as the driving current of the fan motor and the like in the correct steering state and at the minimum rotating speed through experiments to form a minimum judgment load IminThe reference is stored in the controller.
And step S302, starting the target fan motor according to a starting instruction sent by a user and a preset lowest rotating speed.
Step S303, delaying a first preset time to obtain the current value of the target fan motor.
After the target fan motor is powered on and started for the first time, the target fan motor is firstly operated for 5 seconds at the lowest wind speed, and meanwhile, load parameters I such as the driving current of the target fan motor are detected.
And step S304, determining the rotation direction of the target fan motor according to the current value I.
Comparing the detected load parameter with the minimum load parameter, such as detecting that the load parameter I is less than IminAnd 0.5, judging that the motor is in error rotation, and stopping the output of the target fan motor. If it is detected that the load parameter I is larger than or equal to IminAnd judging that the target fan motor is correctly rotated.
In step S305, whether the steering is correct or not is judged, if yes, step S307 is executed, and if not, step S306 is executed.
Step S306, stopping, changing the steering and restarting.
If the target fan motor is in wrong rotation direction, after the output is stopped for 0.5S, the excitation sequence is controlled and output in the opposite direction, and the target fan motor is restarted.
Step S307 ends, saves the excitation sequence, and proceeds to normal control.
Corresponding to the air conditioner in the embodiment of the present application, an embodiment of the present invention further provides a method for controlling an air conditioner, where the method is applied to an air conditioner including a refrigerant circulation circuit, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a total heat exchanger, and a controller, and as shown in fig. 4, the method includes:
step S401, when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor;
in order to improve reliability, in a preferred embodiment of the present application, the current value is obtained by delaying a second preset time period after the target fan motor is started.
Step S402, determining the rotation direction of the target fan motor according to the current value.
In order to accurately determine the rotation direction of the target fan motor, in some embodiments of the present application, the rotation direction of the target fan motor is determined according to the current value, specifically:
if the current value is smaller than a first set value, determining that the steering is wrong steering;
and if the current value is not less than a second set value, determining that the steering is correct steering.
In order to accurately determine the rotation direction of the target fan motor, in some embodiments of the present application, the second set value is a current value of the centrifugal fan motor, which is obtained through a preset test and rotates correctly, at the preset lowest rotation speed, and the second set value is greater than the first set value.
And step S403, if the steering is wrong, stopping the target fan motor, and restarting the target fan motor based on an excitation sequence opposite to the current excitation sequence after delaying for a first preset time.
In order to start in the correct rotation direction when the centrifugal fan motor is started next time, in a preferred embodiment of the present application, after determining the rotation direction of the target fan motor based on the current value, the method further includes:
and if the steering is correct steering, storing the current excitation sequence of the target fan motor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. An air conditioner comprising:
a refrigerant circulation loop, which circulates the refrigerant in a loop composed of a compressor, a condenser, an expansion valve, an evaporator and a four-way valve;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates as a condenser and the other operates as an evaporator;
the total heat exchanger is used for providing outdoor fresh air to the indoor space through the first centrifugal fan and discharging indoor dirty air to the outdoor space through the second centrifugal fan;
wherein the controller is configured to include:
when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor;
determining a rotation direction of the target fan motor according to the current value;
and if the steering is wrong steering, stopping the target fan motor, and restarting the target fan motor based on an excitation sequence opposite to the current excitation sequence after delaying for a first preset time.
2. The air conditioner according to claim 1, wherein the control appliance body is configured to:
if the current value is smaller than a first set value, determining that the steering is wrong steering;
and if the current value is not less than a second set value, determining that the steering is correct steering.
3. The air conditioner according to claim 2, wherein the second set value is a current value of the centrifugal fan motor at the preset minimum rotation speed, which is correctly turned, obtained through a preset test, and the second set value is greater than the first set value.
4. The air conditioner of claim 2, wherein the controller is further configured to:
and if the steering is correct steering, storing the current excitation sequence of the target fan motor.
5. The air conditioner according to claim 1, wherein the current value is obtained by delaying a second preset time period after the target fan motor is started.
6. A control method of an air conditioner, the method is applied to the air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a total heat exchanger and a controller, and is characterized by comprising the following steps:
when a starting instruction sent by a user is received, starting a target fan motor corresponding to the starting instruction in the total heat exchanger based on a preset lowest rotating speed, and acquiring a current value of the target fan motor;
determining a rotation direction of the target fan motor according to the current value;
and if the steering is wrong steering, stopping the target fan motor, and restarting the target fan motor based on an excitation sequence opposite to the current excitation sequence after delaying for a first preset time.
7. The method of claim 6, wherein determining the direction of rotation of the target fan motor based on the current value comprises:
if the current value is smaller than a first set value, determining that the steering is wrong steering;
and if the current value is not less than a second set value, determining that the steering is correct steering.
8. The method of claim 7, wherein the second set point is a current value of the correctly-turned centrifugal fan motor at the preset minimum rotational speed, which is obtained through a preset test, and the second set point is greater than the first set point.
9. The method of claim 7, wherein after determining the target fan motor turn based on the current value, the method further comprises:
and if the steering is correct steering, storing the current excitation sequence of the target fan motor.
10. The method of claim 6, wherein the current value is obtained by delaying a second predetermined time period after starting the target fan motor.
CN202011476632.7A 2020-12-14 2020-12-14 Air conditioner and control method Pending CN112611039A (en)

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CN202011476632.7A CN112611039A (en) 2020-12-14 2020-12-14 Air conditioner and control method

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CN104374026A (en) * 2014-11-18 2015-02-25 徐州市海涛制冷设备有限公司 Multifunctional constant-temperature growth air source heat pump dryer for vegetables
CN104564754A (en) * 2013-10-12 2015-04-29 珠海格力电器股份有限公司 Fan detection control method and system
CN104950946A (en) * 2014-07-29 2015-09-30 希望森兰科技股份有限公司 Heat radiation control system of high-voltage frequency converter
CN105509161A (en) * 2016-01-27 2016-04-20 能节（北京）科技发展有限公司 Air source dual-operation split air conditioner and operation method thereof
CN110260484A (en) * 2019-06-17 2019-09-20 珠海格力电器股份有限公司 Method and device for controlling starting of fan, computer readable storage medium and air conditioner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007314181A (en) * 2007-08-27 2007-12-06 Toshiba Transport Eng Inc Reverse start determination device of electric blower
CN102538141A (en) * 2012-01-18 2012-07-04 广东美的电器股份有限公司 Starting control method for direct-current fan motor of air conditioner
CN104564754A (en) * 2013-10-12 2015-04-29 珠海格力电器股份有限公司 Fan detection control method and system
CN104950946A (en) * 2014-07-29 2015-09-30 希望森兰科技股份有限公司 Heat radiation control system of high-voltage frequency converter
CN104374026A (en) * 2014-11-18 2015-02-25 徐州市海涛制冷设备有限公司 Multifunctional constant-temperature growth air source heat pump dryer for vegetables
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