CN110006150B - Method and device for detecting fault of outdoor fan of air conditioner and air conditioner - Google Patents

Method and device for detecting fault of outdoor fan of air conditioner and air conditioner Download PDF

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Publication number
CN110006150B
CN110006150B CN201910228310.1A CN201910228310A CN110006150B CN 110006150 B CN110006150 B CN 110006150B CN 201910228310 A CN201910228310 A CN 201910228310A CN 110006150 B CN110006150 B CN 110006150B
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air conditioner
pressure
outdoor fan
fault
pressure end
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CN110006150A (en
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付松辉
杨宝林
李秀歌
程绍江
禚百田
张锐钢
高玉辉
官迎君
王建慧
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Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties

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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)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a method and a device for detecting faults of an outdoor fan of an air conditioner and the air conditioner, and belongs to the technical field of air conditioners. The method comprises the following steps: when a compressor of the air conditioner reaches a set rotating speed, acquiring a first high-pressure end pressure and a first running total current of the air conditioner; and judging the fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current. The utility model also provides a device, air conditioner of outdoor fan fault detection of air conditioner. The invention has the beneficial effects that: the fault condition of the outdoor fan is judged by monitoring two parameter states of the high-pressure end pressure and the running total current of the air conditioner, the abnormal fault of the outdoor fan can be quickly positioned and accurately locked without an external sensor, and the normal running of the air conditioner is ensured.

Description

Method and device for detecting fault of outdoor fan of air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for detecting faults of an outdoor fan of an air conditioner and the air conditioner.
Background
The air conditioner fan is used as an important part of air conditioner heat exchange, and has important influence on evaporation and condensation of liquid in an air conditioning system. The outdoor fan of the air conditioner has no speed feedback signal, the running state of the outdoor fan cannot be judged through speed feedback, and when the outdoor fan has abnormal faults such as locked rotor, damage and the like, the fault cannot be quickly positioned, so that the refrigerating or heating effect of the air conditioning system is easily influenced. At present, the rotating speed of the outdoor fan is detected in a mode of externally arranging a rotating speed sensor on the outdoor fan, and then the running state of the outdoor fan is judged.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting faults of an outdoor fan of an air conditioner and the air conditioner, and aims to solve the technical problem that the fault condition of the outdoor fan cannot be accurately judged by using a rotating speed sensor because the rotating speed sensor is easy to cause water inflow failure. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to the embodiment of the invention, the fault condition of the outdoor fan is judged by monitoring two parameter states of the high-voltage end pressure and the running total current of the air conditioner, and the abnormal fault of the outdoor fan can be quickly positioned and accurately locked without an external sensor.
According to a first aspect of embodiments of the present invention, there is provided a method of detecting a fault of an outdoor fan of an air conditioner, the method including:
when a compressor of the air conditioner reaches a set rotating speed, acquiring a first high-pressure end pressure and a first running total current of the air conditioner;
and judging the fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current.
In some optional embodiments, the determining the fault condition of the outdoor fan according to the first high-pressure end pressure and the first total operating current specifically includes:
when P is presentd1>Pdmax，IsNot less than I-I and IsWhen the signal is not equal to I, judging that the outdoor fan has a fault; otherwise, judging that the outdoor fan is not in fault;
wherein, Pd1Is the first high pressure end pressure, P, of the air conditionerdmaxThe upper limit value of the pressure at the high-pressure end for the normal operation of the air conditioner, I is the total current for the normal operation of the air conditioner, I is the consumed current for the normal operation of the outdoor fan, and IsIs the first operating total current of the air conditioner.
In some optional embodiments, after determining that the outdoor fan has a fault, the method further includes:
judging that I-I is less than or equal to Is<Whether I is true;
when I-I is less than or equal to Is<When the I is established, judging that the outdoor fan has a rotating speed abnormal fault;
when I-I is less than or equal to Is<And when the I is not established, judging that the outdoor fan has a locked rotor fault.
In some optional embodiments, the air conditioner further comprises:
the high-pressure end pressure sensor is used for detecting the pressure of the high-pressure end of the air conditioner;
the low-pressure end pressure sensor is used for detecting the low-pressure end pressure of the air conditioner;
the method further comprises the following steps:
judging whether the air conditioner is in a fault shutdown state or not;
after first preset time of a judgment result that the air conditioner is in a fault shutdown state is received, second high-pressure end pressure and second low-pressure end pressure of the air conditioner are obtained;
and judging the fault conditions of the high-pressure end pressure sensor and the low-pressure end pressure sensor according to the second high-pressure end pressure and the second low-pressure end pressure.
In some optional embodiments, the determining the fault condition of the high-pressure end pressure sensor and the low-pressure end pressure sensor according to the second high-pressure end pressure and the second low-pressure end pressure specifically includes:
judgment of Ps2≤Pd2≤Ps2Whether + Δ P holds;
when P is presents2≤Pd2≤Ps2When the + delta P is established, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor do not have faults;
when P is presents2≤Pd2≤Ps2When the + delta P is not satisfied, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor have faults;
wherein, Pd2For receiving a second high-pressure end pressure P of the air conditioner after a first preset time of the determination result that the air conditioner is in the fault shutdown states2And delta P is the pressure of the second low-pressure end of the air conditioner after the first preset time of the judgment result that the air conditioner is in the fault shutdown state is received, and is a preset pressure difference value.
In some optional embodiments, the method further comprises:
acquiring the failure frequency N of the outdoor fan within second preset time;
judging that N is more than or equal to N0Whether the result is true or not;
when N is more than or equal to N0When the detection is established, the fault of the air conditioner is locked, and the fault detection of the outdoor fan is stopped;
when N is more than or equal to N0When the fault is not established, continuing to detect the fault of the outdoor fan;
wherein N is the number of times that the outdoor fan actually breaks down within a second preset time, and N is0And the number of times of faults preset in the second preset time is the number of times of faults preset in the outdoor fan.
According to a second aspect of the embodiments of the present invention, there is provided an apparatus for detecting a fault of an outdoor fan of an air conditioner, including:
the first obtaining unit is used for obtaining a first high-pressure end pressure and a first running total current of the air conditioner after a compressor of the air conditioner reaches a set rotating speed;
and the first judgment unit is used for judging the fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current.
In some optional embodiments, the first determining unit is specifically configured to:
when P is presentd1>Pdmax，IsNot less than I-I and IsWhen the signal is not equal to I, judging that the outdoor fan has a fault; otherwise, judging that the outdoor fan is not in fault;
wherein, Pd1Is the first high pressure end pressure, P, of the air conditionerdmaxThe upper limit value of the pressure at the high-pressure end for the normal operation of the air conditioner, I is the total current for the normal operation of the air conditioner, I is the consumed current for the normal operation of the outdoor fan, and IsIs the first operating total current of the air conditioner.
In some optional embodiments, the first determining unit is further configured to:
judging that I-I is less than or equal to Is<Whether I is true;
when I-I is less than or equal to Is<When the I is established, judging that the outdoor fan has a rotating speed abnormal fault;
when I-I is less than or equal to Is<And when the I is not established, judging that the outdoor fan has a locked rotor fault.
In some optional embodiments, the air conditioner further comprises:
the high-pressure end pressure sensor is used for detecting the pressure of the high-pressure end of the air conditioner;
the low-pressure end pressure sensor is used for detecting the low-pressure end pressure of the air conditioner;
the device still includes:
the second judgment unit is used for judging whether the air conditioner is in a fault shutdown state or not;
the second acquisition unit is used for acquiring a second high-pressure end pressure and a second low-pressure end pressure of the air conditioner after receiving a first preset time of a judgment result that the air conditioner is in a fault shutdown state;
and the third judging unit is used for judging the fault conditions of the high-pressure end pressure sensor and the low-pressure end pressure sensor according to the second high-pressure end pressure and the second low-pressure end pressure.
In some optional embodiments, the third determining unit is specifically configured to:
judgment of Ps2≤Pd2≤Ps2Whether + Δ P holds;
when P is presents2≤Pd2≤Ps2When the + delta P is established, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor do not have faults;
when P is presents2≤Pd2≤Ps2When the + delta P is not satisfied, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor have faults;
wherein, Pd2For receiving a second high-pressure end pressure P of the air conditioner after a first preset time of the determination result that the air conditioner is in the fault shutdown states2And delta P is the pressure of the second low-pressure end of the air conditioner after the first preset time of the judgment result that the air conditioner is in the fault shutdown state is received, and is a preset pressure difference value.
In some optional embodiments, the apparatus further comprises:
the third acquisition unit is used for acquiring the frequency N of the outdoor fan which breaks down within a second preset time;
a fourth judging unit for judging that N is greater than or equal to N0Whether the result is true or not;
a control unit for:
when N is more than or equal to N0When the detection is established, the fault of the air conditioner is locked, and the fault detection of the outdoor fan is stopped;
when N is more than or equal to N0When the fault is not established, continuing to detect the fault of the outdoor fan;
wherein N is the number of times that the outdoor fan actually breaks down within a second preset time, and N is0And the number of times of faults preset in the second preset time is the number of times of faults preset in the outdoor fan.
According to a third aspect of the embodiments of the present invention, there is provided an air conditioner including the apparatus for outdoor fan failure detection of the air conditioner according to the second aspect of the embodiments of the present invention.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the fault condition of the outdoor fan is judged by monitoring two parameter states of the high-pressure end pressure and the running total current of the air conditioner, the abnormal fault of the outdoor fan can be quickly positioned and accurately locked without an external sensor, and the normal running of the air conditioner is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic flow diagram illustrating a method of outdoor fan fault detection for an air conditioner in accordance with an exemplary embodiment;
FIG. 2 is a schematic flow diagram illustrating a method of outdoor fan fault detection for an air conditioner in accordance with yet another exemplary embodiment;
FIG. 3 is a schematic flow diagram illustrating a method of outdoor fan fault detection for an air conditioner in accordance with yet another exemplary embodiment;
FIG. 4 is a flow diagram illustrating a method of determining a fault condition of an outdoor fan in accordance with one exemplary embodiment;
fig. 5 is a schematic structural diagram illustrating an apparatus for detecting a failure of an outdoor fan of an air conditioner according to an exemplary embodiment;
fig. 6 is a schematic structural diagram illustrating an apparatus for detecting a failure of an outdoor fan of an air conditioner according to still another exemplary embodiment.
Description of reference numerals:
11-a first acquisition unit; 12-a second acquisition unit; 13-a third acquisition unit; 21-a first judgment unit; 22-a second determination unit; 23-a third judging unit; 24-a fourth determination unit; 30-a control unit.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The embodiments are merely representative of possible variations, individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
1-3 are flow diagrams illustrating a method of outdoor fan fault detection for an air conditioner according to an exemplary embodiment; FIG. 4 is a schematic flow diagram illustrating a method of determining a fault condition of an outdoor fan in accordance with an exemplary embodiment; fig. 5 to 6 are schematic structural views illustrating an apparatus for outdoor fan failure detection of an air conditioner according to an exemplary embodiment.
The method for detecting the fault of the outdoor fan of the air conditioner is applied to the outdoor alternating current fan of the air conditioner.
In some optional embodiments, as shown in fig. 1, a method for detecting a fault of an outdoor fan of an air conditioner is provided, which specifically includes the following steps:
s101: and when the compressor of the air conditioner reaches a set rotating speed, acquiring a first high-pressure end pressure and a first running total current of the air conditioner.
Here, the first high-pressure end pressure of the air conditioner is the real-time high-pressure side pressure of the air conditioner after the compressor of the air conditioner reaches the set rotation speed, for example, the pressure of the air outlet end of the compressor; the first running total current is the total current on an outdoor unit loop after a compressor of the air conditioner reaches a set rotating speed; the set rotating speed is the preset rotating speed of the compressor of the air conditioner. When the compressor of the air conditioner reaches a set rotating speed, the first high-pressure end pressure and the first running total current of the air conditioner at the moment are obtained, and the fault condition of the outdoor fan is judged.
S102: and judging the fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current.
For an air conditioner which normally runs, when an outdoor fan normally runs, the air conditioner normally returns air and discharges air, and the pressure of a high-pressure end of the air conditioner normally fluctuates within a certain range; when the outdoor fan is blocked or damaged and stops, the air conditioner cannot normally return air and exhaust air, and the pressure of the high-pressure end of the air conditioner can be obviously increased. Therefore, whether the outdoor fan works normally can be judged by judging whether the pressure of the first high-pressure end is abnormally increased when the air conditioner operates.
In addition, when an outdoor fan of the air conditioner operates normally, certain electric energy needs to be consumed, and the total operating current on a main power supply loop of the air conditioner comprises the consumed current of the outdoor fan; when the outdoor fan breaks down abnormally, the consumed current of the outdoor fan is reduced or increased abnormally. Therefore, the normal work of the outdoor fan can be judged through the abnormal change of the first operation total current when the air conditioner operates.
The first high-voltage end pressure or the first total operating current of the air conditioner during operation can also be changed under the influence of other factors, for example, the blockage of the cooling fins of the condenser can cause the first high-voltage end pressure of the air conditioner to rise, and the household voltage to rise can cause the first total operating current of the air conditioner to rise. Therefore, in the method, the fault condition of the outdoor fan is judged by combining two parameter states of the first high-pressure end pressure and the first running total current during the running of the air conditioner, the interference of other uncertain factors on the fault judgment result of the outdoor fan can be reduced, and the fault judgment accuracy of the outdoor fan is improved.
Therefore, the fault condition of the outdoor fan is judged by monitoring two parameter states of the high-pressure end pressure and the total operating current of the air conditioner, the abnormal fault of the outdoor fan can be quickly positioned and accurately locked, and the normal operation of the air conditioner is ensured; meanwhile, an external sensor is not needed, the cost for detecting the fault of the outdoor fan of the air conditioner can be obviously reduced, the production cost of the air conditioner is further reduced, and the economic benefit is high.
In some specific implementation manners, as shown in fig. 4, step S102 specifically includes:
s102a, judging Pd1>Pdmax，IsNot less than I-I and IsIf not equal to I.
Wherein, Pd1Is the first high pressure end pressure, P, of the air conditionerdmaxThe upper limit value of the pressure at the high-pressure end for the normal operation of the air conditioner, I is the total current for the normal operation of the air conditioner, I is the consumed current for the normal operation of the outdoor fan, and IsIs the first operating total current of the air conditioner.
S102b when P isd1>Pdmax，IsNot less than I-I and IsAnd if not, judging that the outdoor fan fails.
Wherein, Pd1>Pdmax，IsNot less than I-I and IsNot true of I, there are several cases:
the first method comprises the following steps: pd1≤Pdmax；
And the second method comprises the following steps: pd1>Pdmax，Is<I-i；
And the third is that: pd1>Pdmax，Is＝I。
The pressure of the first high-pressure end of the air conditioner is not more than the upper limit value of the pressure of the high-pressure end of the air conditioner in normal operation, or the first operation total current of the air conditioner is less than the difference value of the total current of the air conditioner in normal operation and the consumed current of the outdoor fan in normal operation, the first operation total current of the air conditioner is equal to the total current of the air conditioner in normal operation, the three situations do not belong to the situation that the outdoor motor fails, and therefore the outdoor fan is judged not to fail.
S102c when P isd1>Pdmax，IsNot less than I-I and IsIf not equal to I, judging that I-I is less than or equal to Is<Whether I is true.
When two parameter states of the first high-pressure end pressure of the air conditioner and the first operation total current of the air conditioner meet the parameter state of the air conditioner when the outdoor fan fails, the outdoor fan is judged to fail, and the failure type of the outdoor fan is further identified by using the parameter state of the first operation total current of the air conditioner.
S102d, when I-I is less than or equal to Is<And when the I is not established, judging that the outdoor fan has a locked rotor fault.
Here, when I-i.ltoreq.Is<When I is not true, i.e. Pd1>Pdmax，Is>And I, at the moment, the pressure of the first high-pressure end of the air conditioner is greater than the upper limit value of the pressure of the high-pressure end of the normal operation of the air conditioner, the total current of the first operation of the air conditioner is greater than the total current of the normal operation of the air conditioner, the system cannot normally return air and exhaust air, the consumed current of the outdoor fan is greater than the normal consumed current of the outdoor fan, a short circuit occurs, and the situation that the outdoor fan has a locked-rotor fault is indicated.
S102e, when I-I is less than or equal to Is<And when the I is established, judging that the outdoor fan has a rotating speed abnormal fault.
Here, when I-i.ltoreq.Is<When I is established, P is indicatedd1>Pdmax，I-i≤Is<And I, at the moment, the pressure of the first high-pressure end of the air conditioner is greater than the upper limit value of the pressure of the high-pressure end of the normal operation of the air conditioner, the first operation total current of the air conditioner is positioned between the difference value of the total current of the normal operation of the air conditioner and the consumed current of the normal operation of the outdoor fan and the total current of the normal operation of the air conditioner, the system cannot normally return air and exhaust air, and the consumed current of the outdoor fan is less than the normal consumed current of the outdoor fan, so that the rotating speed abnormal fault of the outdoor fan is indicated.
Therefore, the fault type of the outdoor fan can be further accurately judged by utilizing the first running total current of the air conditioner, the maintenance personnel can conveniently perform further investigation, and the maintenance quality is improved.
In some optional embodiments, as shown in fig. 2, a method for detecting a fault of an outdoor fan of an air conditioner is provided, which specifically includes the following steps:
s201: and judging whether the air conditioner is in a fault shutdown state or not.
When the outdoor fan breaks down, the air conditioner stops when the air conditioner breaks down. Here, whether the air conditioner is in the failed state may be determined by determining a rotation speed of a compressor of the air conditioner, for example, when the rotation speed of the compressor is 0, it is determined that the air conditioner is in the failed state.
S202: and after first preset time of a judgment result that the air conditioner is in a fault shutdown state is received, acquiring second high-pressure end pressure and second low-pressure end pressure of the air conditioner.
Here, the second high-pressure side pressure of the air conditioner is the high-pressure side pressure of the air conditioner after receiving the first preset time of the determination result that the air conditioner is in the fault shutdown state, for example, the pressure of the air outlet side of the compressor; the second low-pressure end pressure of the air conditioner is the real-time low-pressure side pressure of the air conditioner after the first preset time of receiving the judgment result that the air conditioner is in the fault shutdown state, for example, the pressure of the air return end of the compressor; the first preset time is the time for adjusting the high-pressure side pressure and the low-pressure side pressure of the air conditioner from the working state to the non-working state. And when the air conditioner is stopped for a first preset time due to a fault, indicating that the air conditioner is in a non-working state, acquiring the second high-pressure end pressure and the second low-pressure end pressure of the air conditioner at the moment, and judging the fault conditions of the high-pressure end pressure sensor and the low-pressure end pressure sensor.
S203: and judging the fault conditions of the high-pressure end pressure sensor and the low-pressure end pressure sensor according to the second high-pressure end pressure and the second low-pressure end pressure.
Here, the high pressure side pressure sensor of the air conditioner is used to detect the high pressure side pressure of the air conditioner; the low-pressure end pressure sensor of the air conditioner is used for detecting the low-pressure end pressure of the air conditioner. When the air conditioner is in a non-working state, the pressure of the second high-pressure end and the pressure of the second low-pressure end tend to be consistent, and the fault condition of the high-pressure end pressure sensor and the fault condition of the low-pressure end pressure sensor can be judged according to whether the pressure of the second high-pressure end and the pressure of the second low-pressure end are consistent or not, so that the fault condition judgment error of the outdoor fan caused by the fault of the high-pressure end pressure sensor is avoided.
S204: and when the compressor of the air conditioner reaches a set rotating speed, acquiring a first high-pressure end pressure and a first running total current of the air conditioner.
S205: and judging the fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current.
Therefore, before the outdoor fan is subjected to fault detection, the fault detection of the high-pressure end pressure sensor is carried out in advance so as to eliminate the fault detection misjudgment of the outdoor fan caused by the fault of the high-pressure end pressure sensor and improve the fault detection accuracy of the outdoor fan of the air conditioner.
In some optional embodiments, as shown in fig. 3, the method for detecting the fault of the outdoor fan of the air conditioner specifically includes the following steps:
s301: after first preset time of a judgment result that the air conditioner is in a fault shutdown state is received, second high-pressure end pressure P of the air conditioner is obtainedd2And a second low pressure end pressure Ps。
S302: judgment of Ps2≤Pd2≤Ps2Whether or not + Δ P is established.
Here, Pd2For receiving a second high-pressure end pressure P of the air conditioner after a first preset time of the determination result that the air conditioner is in the fault shutdown states2And delta P is the pressure of the second low-pressure end of the air conditioner after the first preset time of the judgment result that the air conditioner is in the fault shutdown state is received, and is a preset pressure difference value. After the air conditioner is stopped for the first preset time due to failure, the pressure difference between the high-pressure end pressure and the low-pressure end pressure of the air conditioner can still exist, the failure condition of the high-pressure end pressure sensor and the low-pressure end pressure sensor is judged by judging whether the pressure difference between the second high-pressure end pressure and the second low-pressure end pressure of the air conditioner is within the preset pressure difference range, the judgment operation has tolerance, and the failure detection of the outdoor fan can be ensured to be carried out smoothly under the condition that the error judgment of the failure detection of the outdoor fan caused by the failure of the high-pressure end pressure sensor is avoided.
Alternatively, Δ P may be calculated according to the following equation:
ΔP＝(Pd1-Ps1)-Pv*t
wherein, the delta P is a preset pressure difference value Pd1Is a first high end pressure, Ps1Is a first low pressure end pressure, PvFor a predetermined rate of reduction of the pressure difference between the high-pressure side and the low-pressure side of the air conditioner after a fault shutdown of the air conditioner, t is the firstAnd (4) presetting time. Here, Δ P ≧ 0.
Thus, the value of the delta P is more flexible and accurate.
S303: when P is presents2≤Pd2≤Ps2When + Δ P is established, it is determined that the high-pressure-end pressure sensor and the low-pressure-end pressure sensor are not malfunctioning.
Here, when P iss2≤Pd2≤Ps2When the + Δ P is established, the pressure difference between the second high-pressure end pressure and the second low-pressure end pressure of the air conditioner is within the preset pressure difference range, indicating that the high-pressure end pressure sensor and the low-pressure end pressure sensor are not in fault.
S304: when P is presents2≤Pd2≤Ps2And when the + delta P is not satisfied, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor have faults.
Here, when P iss2≤Pd2≤Ps2When the + delta P is not satisfied, the pressure difference between the second high-pressure end pressure and the second low-pressure end pressure of the air conditioner is not within the preset pressure difference range, and the fact that the high-pressure end pressure sensor and the low-pressure end pressure sensor are in failure is indicated.
S305: when the compressor of the air conditioner reaches a set rotating speed, acquiring a first high-pressure end pressure P of the air conditionerd1And a first running total current I.
S306: judgment of Pd1>Pdmax，IsNot less than I-I and IsIf not equal to I.
S307: when P is presentd1>Pdmax，IsNot less than I-I and IsAnd if not, judging that the outdoor fan fails.
S308: when P is presentd1>Pdmax，IsNot less than I-I and IsAnd when the condition is not equal to I, judging that the outdoor fan has a fault, and entering an air conditioner to stop due to the fault.
S309: and acquiring the failure frequency N of the outdoor fan within second preset time.
S310: judging that N is more than or equal to N0Whether or not this is true.
Here, N is that the outdoor fan actually fails within a second preset timeNumber of times, N0And the number of times of faults preset in the second preset time is the number of times of faults preset in the outdoor fan.
S311: when N is more than or equal to N0And when the fault is not established, continuing the fault detection of the outdoor fan.
Here, when N.gtoreq.N0And if the failure is not met, the actual failure frequency of the outdoor fan in the second preset time does not reach the failure frequency of the outdoor fan in the second preset time, the failure of the outdoor fan is eliminated, the air conditioner works again, and the failure detection of the outdoor fan is continued.
S312: when N is more than or equal to N0And when the detection result is up, the fault locking of the air conditioner is carried out, and the fault detection of the outdoor fan is stopped.
Here, when N.gtoreq.N0When the failure detection is established, the number of times that the outdoor fan actually fails in the second preset time is greater than the number of times that the outdoor fan fails in the second preset time, which indicates that the air conditioner fails, the failure of the air conditioner is locked, the failure detection of the outdoor fan is stopped, the damage to the air conditioner caused by restarting the air conditioner in a failure state is avoided, and the safe operation of the air conditioner is ensured.
And after the outdoor fan breaks down, stopping and repairing the air conditioner, and after the outdoor fan is repaired, restarting the normal operation of the air conditioner. If the outdoor fan fault is frequently detected (for example, three outdoor fan faults are detected within one hour) within the second preset time according to the first high-pressure end pressure and the first running total current, the fault of the air conditioner is indicated, and the fault may be caused by the fault of other components of the air conditioner (for example, the overload running of a compressor). In the process of fault detection of the outdoor fan, the fault detection of the whole air conditioner is carried out in parallel to lock the fault of the air conditioner, so that the damage to the air conditioner caused by restarting the air conditioner in a fault state can be avoided, and the service life of the air conditioner is prolonged.
Therefore, the fault condition of the outdoor fan is judged by monitoring two parameter states of the high-pressure end pressure and the running total current of the air conditioner, the abnormal fault of the outdoor fan can be quickly positioned and accurately locked, the normal running of the air conditioner is ensured, meanwhile, the automatic protection of the air conditioner is carried out according to the frequency of the fault occurrence, the damage to the air conditioner caused by the restarting of the air conditioner in the fault state is avoided, and the safe running of the air conditioner is ensured.
In some alternative embodiments, as shown in fig. 5, there is provided an apparatus for detecting a failure of an outdoor fan of an air conditioner, including:
the first obtaining unit 11 is configured to obtain a first high-pressure end pressure and a first total operating current of the air conditioner after a compressor of the air conditioner reaches a set rotation speed;
and the first judging unit 21 is used for judging the fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current.
In some optional embodiments, the first determining unit 21 is specifically configured to:
when P is presentd>Pdmax，IsNot less than I-I and IsWhen the signal is not equal to I, judging that the outdoor fan has a fault; otherwise, judging that the outdoor fan is not in fault;
wherein, PdIs the first high pressure end pressure, P, of the air conditionerdmaxThe upper limit value of the pressure at the high-pressure end for the normal operation of the air conditioner, I is the total current for the normal operation of the air conditioner, I is the consumed current for the normal operation of the outdoor fan, and IsIs the first operating total current of the air conditioner.
Optionally, the first judging unit 21 is further configured to:
when P is presentd1>Pdmax，IsNot less than I-I and IsIf not equal to I, judging that I-I is less than or equal to Is<Whether I is true;
when I-I is less than or equal to Is<And when the I is not established, judging that the outdoor fan has a locked rotor fault.
When I-I is less than or equal to Is<And when the I is established, judging that the outdoor fan has a rotating speed abnormal fault.
In some alternative embodiments, as shown in fig. 6, there is provided an apparatus for detecting a failure of an outdoor fan of an air conditioner, including:
a second judging unit 22 for judging whether the air conditioner is in a fault shutdown state;
the second obtaining unit 12 is configured to obtain a second high-pressure end pressure and a second low-pressure end pressure of the air conditioner after receiving a first preset time of a determination result that the air conditioner is in a fault shutdown state;
the third judging unit 23 is configured to judge a fault condition of the high-pressure end pressure sensor and the low-pressure end pressure sensor according to the second high-pressure end pressure and the second low-pressure end pressure;
the first obtaining unit 11 is configured to obtain a first high-pressure end pressure and a first total operating current of the air conditioner after a compressor of the air conditioner reaches a set rotation speed;
the first judgment unit 21 is configured to judge a fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current;
the third obtaining unit 13 is configured to obtain the number N of times that the outdoor fan fails within a second preset time;
a fourth judging unit 24 for judging that N is not less than N0Whether the result is true or not;
a control unit 30 for:
when N is more than or equal to N0When the detection is established, the fault of the air conditioner is locked, and the fault detection of the outdoor fan is stopped;
when N is more than or equal to N0When the fault is not established, continuing to detect the fault of the outdoor fan;
wherein N is the number of times that the outdoor fan actually breaks down within a second preset time, and N is0And the number of times of faults preset in the second preset time is the number of times of faults preset in the outdoor fan.
In some alternative embodiments, the second determining unit 22 is specifically configured to:
judgment of Ps2≤Pd2≤Ps2Whether + Δ P holds;
when P is presents2≤Pd2≤Ps2When the + delta P is established, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor do not have faults;
when P is presents2≤Pd2≤Ps2When + delta P is not satisfied, it is determined that the high-pressure-side pressure sensor and the low-pressure-side pressure sensor are malfunctioning；
Wherein, Pd2For receiving a second high-pressure end pressure P of the air conditioner after a first preset time of the determination result that the air conditioner is in the fault shutdown states2And delta P is the pressure of the second low-pressure end of the air conditioner after the first preset time of the judgment result that the air conditioner is in the fault shutdown state is received, and is a preset pressure difference value.
Alternatively, Δ P may be calculated according to the following equation:
ΔP＝(Pd1-Ps1)-Pv*t
wherein, the delta P is a preset pressure difference value Pd1Is a first high end pressure, Ps1Is a first low pressure end pressure, PvAnd t is a first preset time, and is the preset pressure reduction rate of the pressure difference value between the high-pressure side and the low-pressure side of the air conditioner after the air conditioner is shut down due to faults. Here, Δ P ≧ 0.
In some alternative embodiments, there is provided an air conditioner including the apparatus for outdoor fan failure detection of an air conditioner as described above.
In some alternative embodiments, there is also provided a non-transitory computer readable storage medium, such as a memory, comprising instructions executable by a processor to perform the method described above. The non-transitory computer readable storage medium may be a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic tape, an optical storage device, and the like.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, it should be understood that the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
It should be understood that the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. The present invention is not limited to the procedures and structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (11)

1. A method for detecting the fault of an outdoor fan of an air conditioner is characterized by comprising the following steps:
when a compressor of an air conditioner reaches a set rotating speed, acquiring a first high-pressure end pressure and a first running total current of the air conditioner;
judging the fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current;
according to first high-pressure end pressure with first operation total current, judge the fault conditions of outdoor fan, specifically include:
when P is presentd1＞Pdmax，IsNot less than I-I and IsWhen the signal is not equal to I, judging that the outdoor fan has a fault; otherwise, judging that the outdoor fan is not in fault;
wherein, Pd1Is the first high pressure end pressure, P, of the air conditionerdmaxThe upper limit value of the pressure at the high-pressure end for the normal operation of the air conditioner, I is the total current for the normal operation of the air conditioner, I is the consumed current for the normal operation of the outdoor fan, and IsIs the first operating total current of the air conditioner.
2. The method of claim 1, wherein determining that the outdoor fan has failed further comprises:
judging that I-I is less than or equal to IsIf < I is true;
when I-I is less than or equal to IsIf the rotating speed is less than I, judging that the outdoor fan has a rotating speed abnormal fault;
when I-I is less than or equal to IsIf the I is not satisfied, judging that the outdoor fan has a locked rotor fault.
3. The method of claim 1, wherein the air conditioner further comprises:
the high-pressure end pressure sensor is used for detecting the pressure of the high-pressure end of the air conditioner;
the low-pressure end pressure sensor is used for detecting the low-pressure end pressure of the air conditioner;
the method further comprises the following steps:
judging whether the air conditioner is in a fault shutdown state or not;
after receiving a first preset time of a determination result that the air conditioner is in a fault shutdown state,
acquiring a second high-pressure end pressure and a second low-pressure end pressure of the air conditioner;
and judging the fault conditions of the high-pressure end pressure sensor and the low-pressure end pressure sensor according to the second high-pressure end pressure and the second low-pressure end pressure.
4. The method according to claim 3, wherein the determining the fault condition of the high-pressure end pressure sensor and the low-pressure end pressure sensor according to the second high-pressure end pressure and the second low-pressure end pressure specifically comprises:
judgment of Ps2≤Pd2≤Ps2Whether + Δ P holds;
when P is presents2≤Pd2≤Ps2When the + delta P is established, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor do not have faults;
when P is presents2≤Pd2≤Ps2When the + delta P is not satisfied, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor have faults;
wherein, Pd2For receiving a second high-pressure end pressure P of the air conditioner after a first preset time of the determination result that the air conditioner is in the fault shutdown states2And delta P is the pressure of the second low-pressure end of the air conditioner after the first preset time of the judgment result that the air conditioner is in the fault shutdown state is received, and is a preset pressure difference value.
5. The method of claim 1, further comprising:
acquiring the failure frequency N of the outdoor fan within second preset time;
judging that N is more than or equal to N0Whether the result is true or not;
when N is more than or equal to N0When the air conditioner is in a standing state, the air conditioner is locked in a fault mode, and the outdoor fan is stoppedDetecting a fault;
when N is more than or equal to N0When the outdoor fan is not in the set condition, continuing the fault detection of the outdoor fan;
wherein N is the number of times that the outdoor fan actually breaks down within a second preset time, and N is0And the number of times of faults preset in the second preset time is the number of times of faults preset in the outdoor fan.
6. The utility model provides an outdoor fan fault detection's of air conditioner device which characterized in that includes:
the first obtaining unit is used for obtaining a first high-pressure end pressure and a first running total current of the air conditioner after a compressor of the air conditioner reaches a set rotating speed;
the first judgment unit is used for judging the fault condition of the outdoor fan according to the first high-pressure end pressure and the first running total current;
the first judging unit is specifically configured to:
when P is presentd1＞Pdmax，IsNot less than I-I and IsWhen the signal is not equal to I, judging that the outdoor fan has a fault; otherwise, judging that the outdoor fan is not in fault;
wherein, Pd1Is the first high pressure end pressure, P, of the air conditionerdmaxThe upper limit value of the pressure at the high-pressure end for the normal operation of the air conditioner, I is the total current for the normal operation of the air conditioner, I is the consumed current for the normal operation of the outdoor fan, and IsIs the first operating total current of the air conditioner.
7. The apparatus of claim 6, wherein the first determining unit is further configured to:
judging that I-I is less than or equal to IsIf < I is true;
when I-I is less than or equal to IsIf the rotating speed is less than I, judging that the outdoor fan has a rotating speed abnormal fault;
when I-I is less than or equal to IsIf the I is not satisfied, judging that the outdoor fan has a locked rotor fault.
8. The apparatus of claim 6, wherein the air conditioner further comprises:
the high-pressure end pressure sensor is used for detecting the pressure of the high-pressure end of the air conditioner;
the low-pressure end pressure sensor is used for detecting the low-pressure end pressure of the air conditioner;
the device further comprises:
the second judgment unit is used for judging whether the air conditioner is in a fault shutdown state or not;
the second acquisition unit is used for acquiring a second high-pressure end pressure and a second low-pressure end pressure of the air conditioner after receiving a first preset time of a judgment result that the air conditioner is in a fault shutdown state;
and the third judging unit is used for judging the fault conditions of the high-pressure end pressure sensor and the low-pressure end pressure sensor according to the second high-pressure end pressure and the second low-pressure end pressure.
9. The apparatus according to claim 8, wherein the third determining unit is specifically configured to:
judgment of Ps2≤Pd2≤Ps2Whether + Δ P holds;
when P is presents2≤Pd2≤Ps2When the + delta P is established, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor do not have faults;
when P is presents2≤Pd2≤Ps2When the + delta P is not satisfied, judging that the high-pressure end pressure sensor and the low-pressure end pressure sensor have faults;
wherein, Pd2For receiving a second high-pressure end pressure P of the air conditioner after a first preset time of the determination result that the air conditioner is in the fault shutdown states2And delta P is the pressure of the second low-pressure end of the air conditioner after the first preset time of the judgment result that the air conditioner is in the fault shutdown state is received, and is a preset pressure difference value.
10. The apparatus of claim 6, further comprising:
the third acquisition unit is used for acquiring the frequency N of the outdoor fan which breaks down within a second preset time;
a fourth judging unit for judging that N is greater than or equal to N0Whether the result is true or not;
a control unit for:
when N is more than or equal to N0When the detection result is up, performing fault locking on the air conditioner, and stopping fault detection on the outdoor fan;
when N is more than or equal to N0When the outdoor fan is not in the set condition, continuing the fault detection of the outdoor fan;
wherein N is the number of times that the outdoor fan actually breaks down within a second preset time, and N is0And the number of times of faults preset in the second preset time is the number of times of faults preset in the outdoor fan.
11. An air conditioner characterized by comprising the apparatus for outdoor fan failure detection of an air conditioner according to any one of claims 6 to 10.
CN201910228310.1A 2019-03-25 2019-03-25 Method and device for detecting fault of outdoor fan of air conditioner and air conditioner Active CN110006150B (en)

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Publication number Priority date Publication date Assignee Title
CN110513826B (en) * 2019-09-10 2021-09-21 宁波奥克斯电气股份有限公司 Air conditioner and control method thereof
CN110595137B (en) * 2019-09-30 2021-07-23 合肥华凌股份有限公司 Refrigeration equipment and method and device for identifying fan locked rotor
CN110907822B (en) * 2019-10-31 2021-03-30 珠海格力电器股份有限公司 Alternating current motor locked rotor fault detection system and method and information data processing terminal
CN112594884B (en) * 2020-12-10 2022-02-18 珠海格力电器股份有限公司 Air conditioning unit and condenser fan control method and device thereof and storage medium
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06147590A (en) * 1992-11-06 1994-05-27 Fujitsu General Ltd Air conditioner
CN2689105Y (en) * 2004-01-12 2005-03-30 广东新的科技集团有限公司 Control system for outdoor unit of air cooling tubular air conditioner with several indoor units
CN103375874A (en) * 2012-04-23 2013-10-30 珠海格力电器股份有限公司 Air conditioner and refrigerant circulation abnormity protection control method of air conditioner
CN103486687A (en) * 2012-06-12 2014-01-01 珠海格力电器股份有限公司 protection method and protection device of air conditioning system
CN105241034A (en) * 2015-11-17 2016-01-13 广东美的制冷设备有限公司 Control method and control device for air conditioner
CN107631407A (en) * 2017-09-11 2018-01-26 广东美的暖通设备有限公司 The wiring faults detection method and device of air conditioner, air conditioner
CN208487746U (en) * 2018-05-16 2019-02-12 合肥天鹅制冷科技有限公司 A kind of air-conditioning fault pre-alarming and fault locator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06147590A (en) * 1992-11-06 1994-05-27 Fujitsu General Ltd Air conditioner
CN2689105Y (en) * 2004-01-12 2005-03-30 广东新的科技集团有限公司 Control system for outdoor unit of air cooling tubular air conditioner with several indoor units
CN103375874A (en) * 2012-04-23 2013-10-30 珠海格力电器股份有限公司 Air conditioner and refrigerant circulation abnormity protection control method of air conditioner
CN103486687A (en) * 2012-06-12 2014-01-01 珠海格力电器股份有限公司 protection method and protection device of air conditioning system
CN105241034A (en) * 2015-11-17 2016-01-13 广东美的制冷设备有限公司 Control method and control device for air conditioner
CN107631407A (en) * 2017-09-11 2018-01-26 广东美的暖通设备有限公司 The wiring faults detection method and device of air conditioner, air conditioner
CN208487746U (en) * 2018-05-16 2019-02-12 合肥天鹅制冷科技有限公司 A kind of air-conditioning fault pre-alarming and fault locator

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