CN116255678A - Air conditioner and indoor fan rotating speed control method thereof - Google Patents

Air conditioner and indoor fan rotating speed control method thereof Download PDF

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Publication number
CN116255678A
CN116255678A CN202310247687.8A CN202310247687A CN116255678A CN 116255678 A CN116255678 A CN 116255678A CN 202310247687 A CN202310247687 A CN 202310247687A CN 116255678 A CN116255678 A CN 116255678A
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China
Prior art keywords
rotating speed
indoor fan
static pressure
highest
controlling
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CN202310247687.8A
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Chinese (zh)
Inventor
黄远行
招伟
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Hisense Guangdong Air Conditioning Co Ltd
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Hisense Guangdong Air Conditioning Co Ltd
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Priority to CN202310247687.8A priority Critical patent/CN116255678A/en
Publication of CN116255678A publication Critical patent/CN116255678A/en
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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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • 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
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner and a rotating speed control method of an indoor fan thereof. In addition, when the indoor fan operates at the highest windshield, the operation parameters of the fan are timely adjusted according to the static pressure outside the fan or the load condition of the fan, the advantages of the direct-current variable-frequency fan are brought into play, and the fan is prevented from being stopped due to overload or underload. The invention takes the relatively conservative target parameter start as a step, can reduce the static pressure fluctuation or inertia of the static pressure bellows, ensures that the fan operates more stably, greatly reduces the failure of the stall of the fan, and ensures that the fan load is in a controllable reasonable range by adjusting the rotating speed and other operating parameters of the fan in time according to the fluctuation condition of the static pressure outside the machine.

Description

Air conditioner and indoor fan rotating speed control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a method for controlling the rotating speed of an indoor fan of the air conditioner.
Background
The indoor fan in the indoor unit of the air conditioner is mainly used for blowing the air after the heat exchange of the indoor heat exchanger to the indoor, the indoor fan in the existing fixed mode usually adopts fixed parameters to operate, although the stability of output capacity can be ensured by adopting the fixed parameters, the optimal cost performance of the corresponding machine type cannot be exerted, if the indoor fan directly adopts another fixed parameter to operate in the fixed mode, the optimal efficiency can be exerted, and the indoor fan is easily influenced by the overload of a motor caused by the influence of the external environment such as static pressure mutation during starting, so that the stability of the indoor fan is insufficient.
Disclosure of Invention
The embodiment of the invention aims to provide an air conditioner and a method for controlling the rotating speed of an indoor fan thereof, which can prevent stall when the highest windshield in a static pressure bellows starts to operate, so that the indoor fan operates more stably.
To achieve the above object, an embodiment of the present invention provides an air conditioner, including:
the indoor unit is used for adjusting indoor temperature and/or humidity;
the outdoor unit is communicated with the indoor unit through a connecting pipe and is used for providing refrigeration cycle power;
the indoor fan is arranged in the indoor unit and is provided with a plurality of windshields in a preset mode, and each windshield is provided with at least one corresponding rotating speed value;
The static pressure detection device is arranged in the air outlet of the indoor unit and is used for collecting static pressure outside the indoor unit; the off-board static pressure is a static pressure value required by the gas to overcome off-board impedance after leaving the indoor unit;
the controller is configured to:
when the indoor fan runs at a first rotation speed of a set highest windshield, acquiring an off-board static pressure acquired by the static pressure detection device;
controlling the rotating speed of the indoor fan to switch between a first rotating speed and a second rotating speed of the highest windshield according to the static pressure outside the machine; wherein the second rotational speed is greater than the first rotational speed.
As an improvement of the above-mentioned aspect, the controlling the rotational speed of the indoor fan to switch between the first rotational speed and the second rotational speed of the highest damper according to the outboard static pressure includes:
when the static pressure outside the machine is kept stable in a preset first time period, controlling the rotating speed of the indoor fan to be switched to a second rotating speed of the highest windshield;
when the static pressure outside the machine is not kept stable in the first time period, controlling the rotating speed of the indoor fan to be kept at the first rotating speed;
after the indoor fan runs at the second rotating speed of the highest windshield, when the static pressure outside the machine is kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be kept at the second rotating speed;
And after the indoor fan operates at the second rotating speed of the highest windshield, when the static pressure outside the machine is not kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield.
As an improvement of the above solution, the controlling the rotational speed of the indoor fan according to the static pressure outside the machine to switch between the first rotational speed and the second rotational speed of the highest windshield further includes:
after the indoor fan stably operates at the second rotating speed in the second time period, obtaining the external static pressure and the highest power of the indoor fan;
when the fluctuation value of the static pressure outside the machine is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a preset power threshold value, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield;
and when the fluctuation value of the static pressure outside the machine is smaller than or equal to the static pressure fluctuation threshold value and the highest power is smaller than or equal to the power threshold value, controlling the rotating speed of the indoor fan to be kept at the second rotating speed.
As an improvement of the above, the controller is further configured to:
and when the highest windshield entering instruction of the air conditioner is detected, controlling the rotating speed of the indoor fan to gradually rise from zero to a first rotating speed corresponding to the highest windshield.
As an improvement of the above, the controller is further configured to:
and when the highest windshield entering instruction of the air conditioner is detected, controlling the indoor fan to gradually rise to a first rotating speed corresponding to the highest windshield from the current gear.
In order to achieve the above object, the embodiment of the present invention further provides a method for controlling the rotational speed of an indoor fan of an air conditioner, including:
when an indoor fan of the air conditioner runs at a first rotation speed of a set highest windshield, acquiring an external static pressure acquired by a static pressure detection device; the static pressure detection device is arranged in an air outlet of the indoor unit, and the static pressure outside the indoor unit is a static pressure value required by overcoming the external impedance after the air leaves the indoor unit; the indoor fan is preset with a plurality of windshields, and each windshield is provided with at least one corresponding rotating speed value;
controlling the rotating speed of the indoor fan to switch between a first rotating speed and a second rotating speed of the highest windshield according to the static pressure outside the machine; wherein the second rotational speed is greater than the first rotational speed.
As an improvement of the above-mentioned aspect, the controlling the rotational speed of the indoor fan to switch between the first rotational speed and the second rotational speed of the highest damper according to the outboard static pressure includes:
When the static pressure outside the machine is kept stable in a preset first time period, controlling the rotating speed of the indoor fan to be switched to a second rotating speed of the highest windshield;
when the static pressure outside the machine is not kept stable in the first time period, controlling the rotating speed of the indoor fan to be kept at the first rotating speed;
after the indoor fan runs at the second rotating speed of the highest windshield, when the static pressure outside the machine is kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be kept at the second rotating speed;
and after the indoor fan operates at the second rotating speed of the highest windshield, when the static pressure outside the machine is not kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield.
As an improvement of the above solution, the controlling the rotational speed of the indoor fan according to the static pressure outside the machine to switch between the first rotational speed and the second rotational speed of the highest windshield further includes:
after the indoor fan stably operates at the second rotating speed in the second time period, obtaining the external static pressure and the highest power of the indoor fan;
when the fluctuation value of the static pressure outside the machine is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a preset power threshold value, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield;
And when the fluctuation value of the static pressure outside the machine is smaller than or equal to the static pressure fluctuation threshold value and the highest power is smaller than or equal to the power threshold value, controlling the rotating speed of the indoor fan to be kept at the second rotating speed.
As an improvement of the above solution, before the indoor fan of the air conditioner operates at the first rotational speed of the set highest damper, the method further includes:
and when the highest windshield entering instruction of the air conditioner is detected, controlling the rotating speed of the indoor fan to gradually rise from zero to a first rotating speed corresponding to the highest windshield.
As an improvement of the above solution, before the indoor fan of the air conditioner operates at the first rotational speed of the set highest damper, the method further includes:
and when the highest windshield entering instruction of the air conditioner is detected, controlling the indoor fan to gradually rise to a first rotating speed corresponding to the highest windshield from the current gear.
Compared with the prior art, the air conditioner and the indoor fan rotating speed control method thereof disclosed by the invention have the advantages that the highest windshield of the indoor fan is controlled to be started with relatively conservative target parameters until the static pressure outside the air conditioner is detected to be stable, and then the highest windshield of the indoor fan is controlled to be lifted to the optimal capacity parameter for operation, so that the whole capacity energy efficiency of the machine is exerted to the optimal. In addition, when the indoor fan operates at the highest windshield, the operation parameters of the fan are timely adjusted according to the static pressure outside the fan or the load condition of the fan, the advantages of the direct-current variable-frequency fan are brought into play, and the fan is prevented from being stopped due to overload or underload. The invention takes the relatively conservative target parameter start as a step, can reduce the static pressure fluctuation or inertia of the static pressure bellows, ensures that the fan operates more stably, greatly reduces the failure of the stall of the fan, and ensures that the fan load is in a controllable reasonable range by adjusting the rotating speed and other operating parameters of the fan in time according to the fluctuation condition of the static pressure outside the machine.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic flow direction diagram of a refrigerant when the air conditioner according to the embodiment of the present invention is operated in a cooling mode;
fig. 3 is a schematic flow diagram of a refrigerant when the air conditioner according to the embodiment of the present invention is operated in a heating mode;
fig. 4 is a schematic view illustrating an internal structure of an indoor unit of an air conditioner according to an embodiment of the present invention;
FIG. 5 is a first workflow diagram of a controller in an air conditioner according to an embodiment of the present invention;
FIG. 6 is a second flowchart of the operation of the controller in the air conditioner according to the embodiment of the present invention;
FIG. 7 is a third flowchart of the operation of the controller in the air conditioner according to the embodiment of the present invention;
fig. 8 is a fourth operation flowchart of a controller in an air conditioner according to an embodiment of the present invention;
FIG. 9 is a fifth flowchart of the operation of the controller in the air conditioner according to the embodiment of the present invention;
fig. 10 is a flowchart of a method for controlling the rotational speed of an indoor fan of an air conditioner according to an embodiment of the present invention.
100 parts of indoor units; 200. an outdoor unit; 11. a compressor; 12. a four-way valve; 13. an outdoor heat exchanger; 14. an expansion valve; 15. an indoor heat exchanger; 16. an indoor fan; 17. an outdoor fan; 18. an outdoor coil temperature sensor; 19. a voltage monitoring element; 20. an indoor coil temperature sensor; 111. a transverse air deflector; 112. vertical wind deflector; 10A, an air outlet; 10B, an air suction inlet; 101. a housing; 1031. a coiled pipe; 1032. a heat sink.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first", "second" 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 defining "a first", "a second" or the like may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention, and the air conditioner according to an embodiment of the present invention includes an indoor unit 100 and an outdoor unit 200. The indoor unit 100 is used for adjusting the temperature and humidity of indoor air, the outdoor unit 200 is connected with the indoor unit 100 through a connection pipe, the outdoor unit 200 is installed outdoors, and the indoor unit 100 is installed indoors.
Referring to fig. 2, the air conditioner includes a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a throttle device 14, an indoor heat exchanger 15, an indoor fan 16, an outdoor fan 17, an outdoor coil temperature sensor 18, a voltage monitoring element 19, and an indoor coil temperature sensor 20. The indoor heat exchanger 15, the indoor fan 16, the indoor coil temperature sensor 20 are disposed on the indoor unit 100, and the compressor 11, the four-way valve 12, the outdoor heat exchanger 13, the throttle device 14, the outdoor fan 17, the outdoor coil temperature sensor 18, and the voltage monitoring element 19 are disposed on the outdoor unit. The outdoor coil temperature sensor 18 is used to detect the coil temperature of the outdoor heat exchanger 13, the voltage monitoring element 19 is used to monitor the actual operating voltage of the compressor, and the indoor coil temperature sensor 20 is used to detect the coil temperature of the indoor heat exchanger 15.
The air conditioner provided by the embodiment of the invention comprises a refrigeration working condition and a heating working condition. When in refrigeration and heating, the flow directions of the refrigerants are different, and the refrigerants flow through the heat exchanger of the outdoor unit during refrigeration, and at the moment, the outdoor unit is a condenser, and the indoor unit is an evaporator; during heating, the refrigerant flows through the heat exchanger of the indoor unit, and at this time, the indoor unit is a condenser, and the outdoor unit is an evaporator. When the air conditioner is in different states of refrigeration and heating, the flow direction of the refrigerant can be changed through the four-way valve. If the four-way valve is not arranged, the air conditioner can only realize single refrigeration or heating, and can not switch between cold and hot.
Referring to fig. 2, when the air conditioner is refrigerating, the refrigerant is first changed into high-pressure gas through the compressor 11, then into high-pressure liquid through the condensing heat release of the outdoor heat exchanger 13 (condenser), the high-pressure liquid is changed into low-temperature low-pressure liquid through the throttling device 14, and the low-temperature low-pressure gas is changed into low-temperature low-pressure gas through the evaporating heat absorption of the indoor heat exchanger 15 (evaporator), and finally returns to the compressor 11.
Referring to fig. 3, when the air conditioner heats, the refrigerant is first changed into high-pressure gas through the compressor 11, then is first changed into high-pressure liquid through the condensing heat release of the indoor heat exchanger 15 (condenser), the high-pressure liquid is changed into low-temperature low-pressure liquid through the expansion valve, the low-temperature low-pressure liquid is changed into low-temperature low-pressure gas through the evaporating heat release of the outdoor heat exchanger 13 (evaporator), and finally returns to the compressor 11.
Referring to fig. 4, fig. 4 is a schematic view illustrating an internal structure of an indoor unit 100 according to an embodiment of the present invention, where the indoor unit 100 includes a housing 101, an indoor fan 16, and an indoor heat exchanger 15.
The housing 101 has a box shape having a plurality of openings and extending in a longitudinal direction (hereinafter also referred to as a left-right direction). A plurality of air suction ports 10B are provided at the top surface of the casing 101, and the indoor air in the vicinity of the air suction ports 10B is sucked into the casing 101 from the air suction ports 10B by driving the indoor fan 16. The indoor air sucked from the suction port 10B is sent to the indoor fan 16 through the indoor heat exchanger 15. An air outlet 10A is formed in a bottom surface portion of the casing 101, and the air outlet 10A is connected to an inside of the casing 101 through a swirl flow path continuous from the indoor fan 16. The indoor air sucked from the suction port 10B is heat-exchanged by the indoor heat exchanger 15, and then blown out from the air outlet 10A into the room through a swirl flow path.
The indoor heat exchanger 15 is configured by a plurality of fins and a coil 1032 penetrating the plurality of fins 1031, and the indoor heat exchanger 15 functions as an evaporator or a radiator according to the operation state of the indoor unit 100, and exchanges heat between the refrigerant flowing through the coil and the air passing through the indoor heat exchanger 15.
The indoor fan 16 is a direct-current variable-frequency fan with adjustable rotating speed, and the running parameters of the indoor fan can be adjusted according to the needs. The air outlet 10A is provided with a static pressure detecting device (not shown in the figure) for detecting an external static pressure environment value corresponding to the air outlet 10A. The indoor fan 16 is located at a substantially central portion inside the casing 101, and the indoor fan 16 is a cross-flow fan having a substantially cylindrical shape elongated in a longitudinal direction (left-right direction) of the indoor unit 100. By rotationally driving the indoor fan 16, the indoor air is sucked from the suction port 10B, and the conditioned air generated by passing through the air filter and then through the indoor heat exchanger 15 is blown out from the air outlet 10A into the room. The greater the rotational speed of the indoor fan 16, the greater the amount of conditioned air blown out from the air outlet 10A.
In the embodiment of the invention, the highest windshield of the indoor fan is controlled to start with a relatively conservative target parameter until the static pressure outside the machine is detected to be stable, and then the highest windshield of the indoor fan is controlled to be lifted to the optimal capacity parameter for operation, so that the whole capacity energy efficiency of the machine is exerted to the optimal.
The controller of the air conditioner is configured to: when the indoor fan runs at a first rotation speed of a set highest windshield, acquiring an off-board static pressure acquired by the static pressure detection device; controlling the rotating speed of the indoor fan to switch between a first rotating speed and a second rotating speed of the highest windshield according to the static pressure outside the machine; wherein the second rotational speed is greater than the first rotational speed.
Referring to fig. 5, fig. 5 is a first operation flowchart of a controller in an air conditioner according to an embodiment of the present invention, where the controller is configured to perform steps S11 to S13:
and S11, judging whether the indoor fan runs at the first rotation speed of the highest windshield, if so, executing the step S12, and if not, continuing to execute the step S11.
The air conditioner in the embodiment of the invention is provided with a plurality of wind shields, each wind shield has at least one corresponding rotating speed value, a user can adjust the wind speed gear through a remote controller, for example, a wind shield key in the existing remote controller adjusts the wind speed gear, or when the air conditioner is provided with voice recognition, the user can adjust the wind speed gear by sending out a voice control command. When a user adjusts the wind speed to the highest wind speed through keys or voice, the controller defaults to adjust the rotating speed of the indoor fan to a first rotating speed in the highest wind speed, and a second rotating speed in the highest wind speed is automatically adjusted by the air conditioner according to the running condition of the indoor fan.
And S12, when the indoor fan runs at the first rotation speed of the set highest windshield, acquiring the off-board static pressure acquired by the static pressure detection device, and then entering step S13.
Illustratively, static pressure is a measure of the wind delivery capacity of a fan, the greater the static pressure, the greater the wind delivery capacity of the fan, and the static pressure is in Pa. Specifically, the static pressure is the pressure in the bellows when the fan is turned on to a maximum gear and the outlet for the wind is sealed. The static pressure of each machine is different according to different technical standards of each manufacturer, but the definition and the function of the static pressure are the same. The static pressure generated by the air conditioner internal fan (indoor fan) is divided into an internal static pressure and an external static pressure, wherein the internal static pressure is a static pressure value required by air flow for overcoming the internal impedance (such as coil and the like) of the air conditioner, and the external static pressure is a static pressure value required by air flow for overcoming the external impedance after leaving the air conditioner. In the embodiment of the invention, the static pressure outside the indoor unit can be detected by installing the static pressure detection device in the air outlet of the indoor unit.
And S13, controlling the rotating speed of the indoor fan to switch between the first rotating speed and the second rotating speed of the highest windshield according to the static pressure outside the machine.
By monitoring the outdoor static pressure, whether the indoor fan can stably run between the first rotating speed and the second rotating speed or not can be determined, the running parameters of the indoor fan can be timely adjusted, the advantages of the direct-current variable-frequency fan can be brought into play, and meanwhile the phenomenon that the indoor fan is overloaded or underloaded and stopped is avoided.
Specifically, the controlling the rotational speed of the indoor fan according to the static pressure outside the machine to switch between the first rotational speed and the second rotational speed of the highest windshield includes: when the static pressure outside the machine is kept stable in a preset first time period, controlling the rotating speed of the indoor fan to be switched to a second rotating speed of the highest windshield; when the static pressure outside the machine is not kept stable in the first time period, controlling the rotating speed of the indoor fan to be kept at the first rotating speed; after the indoor fan runs at the second rotating speed of the highest windshield, when the static pressure outside the machine is kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be kept at the second rotating speed; and after the indoor fan operates at the second rotating speed of the highest windshield, when the static pressure outside the machine is not kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield.
Referring to fig. 6, fig. 6 is a second working flowchart of the controller in the air conditioner according to the embodiment of the present invention, and the step S13 specifically includes steps S131 to S136:
and S131, judging whether the static pressure outside the air conditioner is kept stable in a preset first time period when the air conditioner is at the first rotating speed, if so, executing the step S133, and if not, executing the step S132.
And S132, when the static pressure outside the machine is not kept stable in the first time period, controlling the rotating speed of the indoor fan to be kept at the first rotating speed, and returning to the step S131.
And S133, when the static pressure outside the machine is kept stable in a preset first time period, controlling the rotating speed of the indoor fan to be switched to the second rotating speed of the highest windshield, and then entering step S134.
Illustratively, the first time period is 3 minutes. When the air conditioner is at the first rotating speed, whether the static pressure outside the air conditioner meets the stability requirement for 3min is detected by the static pressure outside the air conditioner collecting device, if the static pressure outside the air conditioner does not meet the stability requirement, the static pressure outside the air conditioner is not stable enough at the first rotating speed of the highest windshield, the rotating speed can not be increased up again, and if the static pressure is increased continuously, a stall phenomenon can occur, so the air conditioner still needs to be kept in the original state to operate (at this time, the reason that the original rotating speed can be kept is because the windshield at the first rotating speed is the rotating speed suitable for the air conditioner when the highest windshield defaults, although the static pressure outside the air conditioner is unstable at this time, the rotating speed is not too high, and the stall probability is low). Otherwise, if the static pressure outside the machine is kept stable for 3min, the rotating speed of the indoor fan has room for up-regulation, stall is avoided in a high probability, and the indoor fan is controlled to gradually rise from the first rotating speed to the second rotating speed by taking the second rotating speed as a target parameter.
Further, to avoid that the static pressure outside the indoor fan is not stable when the indoor fan is at the first rotation speed, that is, the process of steps S131 to S132 is repeated for too long, it indicates that the first rotation speed is not suitable for the current highest windshield, and long-term operation may cause the indoor fan to malfunction, so that the first rotation speed needs to be reduced, and the controller is further configured to: when the static pressure outside the aircraft is not kept stable in a preset first time period, acquiring the operation duration which is not kept stable; and when the indoor fan does not receive the gear descending instruction, if the running duration is greater than a set duration threshold value, reducing the first rotating speed.
And S134, after the indoor fan runs at the second rotating speed of the highest windshield, judging whether the static pressure outside the indoor fan is stable in a preset second time period, if so, executing the step S136, and if not, executing the step S135.
And S135, when the static pressure outside the machine is not kept stable within a preset second time period, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield, and returning to the step S131.
And S136, when the static pressure outside the machine is kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be kept at the second rotating speed.
The second period of time is, for example, 3 minutes. When the air conditioner is at the second rotating speed, whether the static pressure outside the air conditioner meets the requirement of stabilizing for 3min is detected by an external static pressure acquisition device, if the static pressure outside the air conditioner does not meet the requirement, the indoor fan is not stable enough at the second rotating speed of the highest windshield and cannot maintain the high rotating speed, and if the current rotating speed is continuously maintained, a stall phenomenon can occur, so that the rotating speed of the indoor fan is reduced to the first rotating speed. Otherwise, if the static pressure outside the machine is kept stable for 3min, the condition that the rotating speed of the indoor fan is kept stable at the second rotating speed is indicated, stall is avoided in a large probability, and the indoor fan is controlled to continue to operate by taking the second rotating speed as a target parameter.
It should be noted that the above-mentioned determination process for whether the static pressure outside the aircraft is stable includes: the off-board static pressure is kept stable in the first time period/the second time period when the off-board static pressure is kept unchanged in the first time period/the second time period; alternatively, the fluctuation of the off-board static pressure in the first/second time periods is small (less than a certain fluctuation minimum threshold), and almost negligible, indicating that the off-board static pressure remains stable in the first/second time periods.
Specifically, the controlling the rotation speed of the indoor fan according to the static pressure outside the machine to switch between the first rotation speed and the second rotation speed of the highest windshield further includes: after the indoor fan stably operates at the second rotating speed in the second time period, obtaining the external static pressure and the highest power of the indoor fan; when the fluctuation value of the static pressure outside the machine is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a preset power threshold value, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield; and when the fluctuation value of the static pressure outside the machine is smaller than or equal to the static pressure fluctuation threshold value and the highest power is smaller than or equal to the power threshold value, controlling the rotating speed of the indoor fan to be kept at the second rotating speed.
Referring to fig. 7, fig. 7 is a third workflow diagram of a controller in an air conditioner according to an embodiment of the present invention, where after step S136 is performed, the controller is further configured to perform steps S137 to S140:
and S137, after the indoor fan stably operates at the second rotating speed in the second time period, acquiring the static pressure outside the indoor fan and the highest power, and then entering step S138.
S138, judging whether the static pressure outside the machine is larger than a set static pressure threshold value or whether the highest power is larger than a set power threshold value, and if so, entering a step S139; if not, the process proceeds to step S140.
And S139, when the fluctuation value of the static pressure outside the machine is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a preset power threshold value, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield.
And S140, when the fluctuation value of the static pressure outside the machine is smaller than or equal to the static pressure fluctuation threshold value and the highest power is smaller than or equal to the power threshold value, controlling the rotating speed of the indoor fan to be kept at the second rotating speed.
The method includes the steps that after the second rotating speed of the indoor fan is maintained for more than 3 minutes, the static pressure outside the indoor fan and the highest power are obtained, and the static pressure outside the indoor fan and the highest power are taken as judgment, when the static pressure fluctuation value outside the indoor fan is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a power threshold value, the running of the indoor fan is unstable, the rotating speed needs to be reduced, the running parameters of the indoor fan are controlled to be reduced from the second rotating speed to the first rotating speed at the moment, the cycle is judged again, and otherwise, the running is continued all the time at the second rotating speed, and the next cycle is started.
Specifically, the controller is further configured to: and when the highest windshield entering instruction of the air conditioner is detected, controlling the rotating speed of the indoor fan to gradually rise from zero to a first rotating speed corresponding to the highest windshield.
Referring to fig. 8, fig. 8 is a fourth operation flowchart of the controller in the air conditioner according to the embodiment of the present invention, and the step S1 specifically includes steps S101 to S1021:
s101, judging whether a highest windshield entering instruction of the air conditioner is detected, if so, entering a step S1021, and if not, continuing to execute the step S101.
S1021, when a highest windshield entering instruction of the air conditioner is detected, controlling the rotating speed of the indoor fan to gradually rise from zero to a first rotating speed corresponding to the highest windshield.
At this time, the air conditioner is started by a user, and the windshield of the air conditioner is at the lowest windshield, so that the rotating speed of the indoor fan is controlled to gradually increase from zero to the first rotating speed, the indoor fan is given a proper buffer time, the rotating speed is prevented from being directly and quickly adjusted to the highest, and the condition that the motor is overloaded and stopped due to the influence of the external environment such as static pressure mutation is avoided.
Specifically, the controller is further configured to: and when the highest windshield entering instruction of the air conditioner is detected, controlling the indoor fan to gradually rise to a first rotating speed corresponding to the highest windshield from the current gear.
Referring to fig. 9, fig. 9 is a fifth working flowchart of the controller in the air conditioner according to the embodiment of the present invention, and the step S1 specifically includes steps S101 to S1022:
s101, judging whether a highest windshield entering instruction of the air conditioner is detected, if so, entering a step S1021, and if not, continuing to execute the step S101.
And S1022, when the highest windshield entering instruction of the air conditioner is detected, controlling the indoor fan to gradually rise to a first rotating speed corresponding to the highest windshield from the current gear.
At this time, the user may just start the air conditioner, and if the windshield of the air conditioner is at the lowest windshield, the rotation speed of the indoor fan is controlled to gradually increase from the current gear to the first rotation speed, so as to give the indoor fan proper buffer time, avoid directly and quickly adjusting the rotation speed to the highest value, and further avoid the condition that the motor is overloaded and stopped due to the influence of the external environment such as static pressure mutation.
Compared with the prior art, the air conditioner disclosed by the invention is started by controlling the highest windshield of the indoor fan to be in a relatively conservative target parameter until the static pressure outside the air conditioner is detected to be stable, and controlling the highest windshield of the indoor fan to be lifted to the optimal capacity parameter for operation, so that the whole capacity energy efficiency of the machine is exerted to the optimal. In addition, when the indoor fan operates at the highest windshield, the operation parameters of the fan are timely adjusted according to the static pressure outside the fan or the load condition of the fan, the advantages of the direct-current variable-frequency fan are brought into play, and the fan is prevented from being stopped due to overload or underload. The invention takes the relatively conservative target parameter start as a step, can reduce the static pressure fluctuation or inertia of the static pressure bellows, ensures that the fan operates more stably, greatly reduces the failure of the stall of the fan, and ensures that the fan load is in a controllable reasonable range by adjusting the rotating speed and other operating parameters of the fan in time according to the fluctuation condition of the static pressure outside the machine.
Referring to fig. 10, fig. 10 is a flowchart of a method for controlling the rotational speed of an indoor fan of an air conditioner according to an embodiment of the present invention, where the method for controlling the rotational speed of the indoor fan is implemented by a controller in the air conditioner, and a static pressure detection device for collecting static pressure outside an air conditioner is disposed in an air outlet of an indoor unit of the air conditioner. The method for controlling the rotating speed of the indoor fan of the air conditioner comprises the following steps:
s1, when an indoor fan of an air conditioner runs at a first rotation speed of a set highest windshield, acquiring an external static pressure acquired by a static pressure detection device; the static pressure detection device is arranged in an air outlet of the indoor unit;
s2, controlling the rotating speed of the indoor fan to switch between a first rotating speed and a second rotating speed of the highest windshield according to the static pressure outside the machine; wherein the second rotational speed is greater than the first rotational speed.
The air conditioner in the embodiment of the invention is provided with a plurality of wind speed gears in advance, a user can adjust the gears through a remote controller, for example, a windshield key in the existing remote controller adjusts the wind speed gears, or when the air conditioner is provided with voice recognition, the user can adjust the wind speed gears through sending out a voice control command. When a user adjusts the wind speed to the highest wind speed through keys or voice, the controller defaults to adjust the rotating speed of the indoor fan to a first rotating speed in the highest wind speed, and a second rotating speed in the highest wind speed is automatically adjusted by the air conditioner according to the running condition of the indoor fan. Because the off-machine static pressure can reflect the air supply capacity of the indoor fan, whether the indoor fan can stably operate between the first rotating speed and the second rotating speed or not can be determined by monitoring the off-machine static pressure, the operating parameters of the indoor fan can be timely adjusted, the advantages of the direct-current variable-frequency fan are brought into play, and meanwhile the phenomenon that the indoor fan is overloaded or underloaded and stopped is avoided.
Specifically, the controlling the rotational speed of the indoor fan according to the static pressure outside the machine to switch between the first rotational speed and the second rotational speed of the highest windshield includes: when the static pressure outside the machine is kept stable in a preset first time period, controlling the rotating speed of the indoor fan to be switched to a second rotating speed of the highest windshield; when the static pressure outside the machine is not kept stable in the first time period, controlling the rotating speed of the indoor fan to be kept at the first rotating speed; after the indoor fan runs at the second rotating speed of the highest windshield, when the static pressure outside the machine is kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be kept at the second rotating speed; and after the indoor fan operates at the second rotating speed of the highest windshield, when the static pressure outside the machine is not kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield.
Illustratively, the first time period is 3 minutes. When the air conditioner is at the first rotating speed, whether the static pressure outside the air conditioner meets the stability requirement for 3min is detected by the static pressure outside the air conditioner collecting device, if the static pressure outside the air conditioner does not meet the stability requirement, the static pressure outside the air conditioner is not stable enough at the first rotating speed of the highest windshield, the rotating speed can not be increased up again, and if the static pressure is increased continuously, a stall phenomenon can occur, so the air conditioner still needs to be kept in the original state to operate (at this time, the reason that the original rotating speed can be kept is because the windshield at the first rotating speed is the rotating speed suitable for the air conditioner when the highest windshield defaults, although the static pressure outside the air conditioner is unstable at this time, the rotating speed is not too high, and the stall probability is low). Otherwise, if the static pressure outside the machine is kept stable for 3min, the rotating speed of the indoor fan has room for up-regulation, stall is avoided in a high probability, and the indoor fan is controlled to gradually rise from the first rotating speed to the second rotating speed by taking the second rotating speed as a target parameter.
Further, to avoid that the static pressure outside the indoor fan is not stable when the indoor fan is at the first rotation speed, that is, the process of steps S131 to S132 is repeated for too long, it indicates that the first rotation speed is not suitable for the current highest windshield, and long-term operation may cause the indoor fan to malfunction, so that the first rotation speed needs to be reduced, and the controller is further configured to: when the static pressure outside the aircraft is not kept stable in a preset first time period, acquiring the operation duration which is not kept stable; and when the indoor fan does not receive the gear descending instruction, if the running duration is greater than a set duration threshold value, reducing the first rotating speed.
The second period of time is, for example, 3 minutes. When the air conditioner is at the second rotating speed, whether the static pressure outside the air conditioner meets the requirement of stabilizing for 3min is detected by an external static pressure acquisition device, if the static pressure outside the air conditioner does not meet the requirement, the indoor fan is not stable enough at the second rotating speed of the highest windshield and cannot maintain the high rotating speed, and if the current rotating speed is continuously maintained, a stall phenomenon can occur, so that the rotating speed of the indoor fan is reduced to the first rotating speed. Otherwise, if the static pressure outside the machine is kept stable for 3min, the condition that the rotating speed of the indoor fan is kept stable at the second rotating speed is indicated, stall is avoided in a large probability, and the indoor fan is controlled to continue to operate by taking the second rotating speed as a target parameter.
It should be noted that the above-mentioned determination process for whether the static pressure outside the aircraft is stable includes: the off-board static pressure is kept stable in the first time period/the second time period when the off-board static pressure is kept unchanged in the first time period/the second time period; alternatively, the fluctuation of the off-board static pressure in the first/second time periods is small (less than a certain fluctuation minimum threshold), and almost negligible, indicating that the off-board static pressure remains stable in the first/second time periods.
Specifically, the controlling the rotation speed of the indoor fan according to the static pressure outside the machine to switch between the first rotation speed and the second rotation speed of the highest windshield further includes: after the indoor fan stably operates at the second rotating speed in the second time period, obtaining the external static pressure and the highest power of the indoor fan; when the fluctuation value of the static pressure outside the machine is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a preset power threshold value, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield; and when the fluctuation value of the static pressure outside the machine is smaller than or equal to the static pressure fluctuation threshold value and the highest power is smaller than or equal to the power threshold value, controlling the rotating speed of the indoor fan to be kept at the second rotating speed.
The method includes the steps that after the second rotating speed of the indoor fan is maintained for more than 3 minutes, the static pressure outside the indoor fan and the highest power are obtained, and the static pressure outside the indoor fan and the highest power are taken as judgment, when the static pressure fluctuation value outside the indoor fan is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a power threshold value, the running of the indoor fan is unstable, the rotating speed needs to be reduced, the running parameters of the indoor fan are controlled to be reduced from the second rotating speed to the first rotating speed at the moment, the cycle is judged again, and otherwise, the running is continued all the time at the second rotating speed, and the next cycle is started.
Specifically, before the indoor fan of the air conditioner operates at the first rotation speed of the set highest windshield, the method further comprises: and when the highest windshield entering instruction of the air conditioner is detected, controlling the rotating speed of the indoor fan to gradually rise from zero to a first rotating speed corresponding to the highest windshield.
At this time, the air conditioner is started by a user, and the windshield of the air conditioner is at the lowest windshield, so that the rotating speed of the indoor fan is controlled to gradually increase from zero to the first rotating speed, the indoor fan is given a proper buffer time, the rotating speed is prevented from being directly and quickly adjusted to the highest, and the condition that the motor is overloaded and stopped due to the influence of the external environment such as static pressure mutation is avoided.
Specifically, before the indoor fan of the air conditioner operates at the first rotation speed of the set highest windshield, the method further comprises: and when the highest windshield entering instruction of the air conditioner is detected, controlling the indoor fan to gradually rise to a first rotating speed corresponding to the highest windshield from the current gear.
At this time, the user may just start the air conditioner, and if the windshield of the air conditioner is at the lowest windshield, the rotation speed of the indoor fan is controlled to gradually increase from the current gear to the first rotation speed, so as to give the indoor fan proper buffer time, avoid directly and quickly adjusting the rotation speed to the highest value, and further avoid the condition that the motor is overloaded and stopped due to the influence of the external environment such as static pressure mutation.
Compared with the prior art, the method for controlling the rotating speed of the indoor fan of the air conditioner disclosed by the invention has the advantages that the highest windshield of the indoor fan is controlled to be started with relatively conservative target parameters until the static pressure outside the air conditioner is detected to be stable, and then the highest windshield of the indoor fan is controlled to be lifted to the optimal capacity parameter for operation, so that the whole capacity energy efficiency of the air conditioner is enabled to be exerted optimally. In addition, when the indoor fan operates at the highest windshield, the operation parameters of the fan are timely adjusted according to the static pressure outside the fan or the load condition of the fan, the advantages of the direct-current variable-frequency fan are brought into play, and the fan is prevented from being stopped due to overload or underload. The invention takes the relatively conservative target parameter start as a step, can reduce the static pressure fluctuation or inertia of the static pressure bellows, ensures that the fan operates more stably, greatly reduces the failure of the stall of the fan, and ensures that the fan load is in a controllable reasonable range by adjusting the rotating speed and other operating parameters of the fan in time according to the fluctuation condition of the static pressure outside the machine.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (10)

1. An air conditioner, comprising:
the indoor unit is used for adjusting indoor temperature and/or humidity;
the outdoor unit is communicated with the indoor unit through a connecting pipe and is used for providing refrigeration cycle power;
the indoor fan is arranged in the indoor unit and is provided with a plurality of windshields in a preset mode, and each windshield is provided with at least one corresponding rotating speed value;
the static pressure detection device is arranged in the air outlet of the indoor unit and is used for collecting static pressure outside the indoor unit; the off-board static pressure is a static pressure value required by the gas to overcome off-board impedance after leaving the indoor unit;
the controller is configured to:
when the indoor fan runs at a first rotation speed of a set highest windshield, acquiring an off-board static pressure acquired by the static pressure detection device;
controlling the rotating speed of the indoor fan to switch between a first rotating speed and a second rotating speed of the highest windshield according to the static pressure outside the machine; wherein the second rotational speed is greater than the first rotational speed.
2. The air conditioner as set forth in claim 1, wherein said controlling the rotational speed of said indoor fan to be switched between the first rotational speed and the second rotational speed of said highest damper according to said static outside pressure includes:
when the static pressure outside the machine is kept stable in a preset first time period, controlling the rotating speed of the indoor fan to be switched to a second rotating speed of the highest windshield;
when the static pressure outside the machine is not kept stable in the first time period, controlling the rotating speed of the indoor fan to be kept at the first rotating speed;
after the indoor fan runs at the second rotating speed of the highest windshield, when the static pressure outside the machine is kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be kept at the second rotating speed;
and after the indoor fan operates at the second rotating speed of the highest windshield, when the static pressure outside the machine is not kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield.
3. The air conditioner as set forth in claim 2, wherein said controlling the rotational speed of said indoor fan in accordance with said static pressure outside said air conditioner switches between a first rotational speed and a second rotational speed of said highest damper, further comprising:
After the indoor fan stably operates at the second rotating speed in the second time period, obtaining the external static pressure and the highest power of the indoor fan;
when the fluctuation value of the static pressure outside the machine is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a preset power threshold value, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield;
and when the fluctuation value of the static pressure outside the machine is smaller than or equal to the static pressure fluctuation threshold value and the highest power is smaller than or equal to the power threshold value, controlling the rotating speed of the indoor fan to be kept at the second rotating speed.
4. The air conditioner of claim 1, wherein the controller is further configured to:
and when the highest windshield entering instruction of the air conditioner is detected, controlling the rotating speed of the indoor fan to gradually rise from zero to a first rotating speed corresponding to the highest windshield.
5. The air conditioner of claim 1, wherein the controller is further configured to:
and when the highest windshield entering instruction of the air conditioner is detected, controlling the indoor fan to gradually rise to a first rotating speed corresponding to the highest windshield from the current gear.
6. The method for controlling the rotating speed of the indoor fan of the air conditioner is characterized by comprising the following steps of:
when an indoor fan of the air conditioner runs at a first rotation speed of a set highest windshield, acquiring an external static pressure acquired by a static pressure detection device; the static pressure detection device is arranged in an air outlet of the indoor unit, and the static pressure outside the indoor unit is a static pressure value required by overcoming the external impedance after the air leaves the indoor unit; the indoor fan is preset with a plurality of windshields, and each windshield is provided with at least one corresponding rotating speed value;
controlling the rotating speed of the indoor fan to switch between a first rotating speed and a second rotating speed of the highest windshield according to the static pressure outside the machine; wherein the second rotational speed is greater than the first rotational speed.
7. The method of controlling rotational speed of an indoor fan of an air conditioner according to claim 6, wherein the controlling the rotational speed of the indoor fan to be switched between the first rotational speed and the second rotational speed of the highest damper according to the static pressure outside the machine comprises:
when the static pressure outside the machine is kept stable in a preset first time period, controlling the rotating speed of the indoor fan to be switched to a second rotating speed of the highest windshield;
When the static pressure outside the machine is not kept stable in the first time period, controlling the rotating speed of the indoor fan to be kept at the first rotating speed;
after the indoor fan runs at the second rotating speed of the highest windshield, when the static pressure outside the machine is kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be kept at the second rotating speed;
and after the indoor fan operates at the second rotating speed of the highest windshield, when the static pressure outside the machine is not kept stable in a preset second time period, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield.
8. The method for controlling rotational speed of an indoor fan of an air conditioner according to claim 7, wherein the controlling the rotational speed of the indoor fan according to the static pressure outside the air conditioner is switched between a first rotational speed and a second rotational speed of the highest damper, further comprising:
after the indoor fan stably operates at the second rotating speed in the second time period, obtaining the external static pressure and the highest power of the indoor fan;
when the fluctuation value of the static pressure outside the machine is larger than a preset static pressure fluctuation threshold value or the highest power is larger than a preset power threshold value, controlling the rotating speed of the indoor fan to be switched to the first rotating speed of the highest windshield;
And when the fluctuation value of the static pressure outside the machine is smaller than or equal to the static pressure fluctuation threshold value and the highest power is smaller than or equal to the power threshold value, controlling the rotating speed of the indoor fan to be kept at the second rotating speed.
9. The method for controlling the rotational speed of an indoor fan of an air conditioner according to claim 6, wherein the indoor fan of the air conditioner is operated before the first rotational speed of the set highest damper, the method further comprising:
and when the highest windshield entering instruction of the air conditioner is detected, controlling the rotating speed of the indoor fan to gradually rise from zero to a first rotating speed corresponding to the highest windshield.
10. The method for controlling the rotational speed of an indoor fan of an air conditioner according to claim 6, wherein the indoor fan of the air conditioner is operated before the first rotational speed of the set highest damper, the method further comprising:
and when the highest windshield entering instruction of the air conditioner is detected, controlling the indoor fan to gradually rise to a first rotating speed corresponding to the highest windshield from the current gear.
CN202310247687.8A 2023-03-14 2023-03-14 Air conditioner and indoor fan rotating speed control method thereof Pending CN116255678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310247687.8A CN116255678A (en) 2023-03-14 2023-03-14 Air conditioner and indoor fan rotating speed control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310247687.8A CN116255678A (en) 2023-03-14 2023-03-14 Air conditioner and indoor fan rotating speed control method thereof

Publications (1)

Publication Number Publication Date
CN116255678A true CN116255678A (en) 2023-06-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310247687.8A Pending CN116255678A (en) 2023-03-14 2023-03-14 Air conditioner and indoor fan rotating speed control method thereof

Country Status (1)

Country Link
CN (1) CN116255678A (en)

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