CN111550905B - Detection method and detection device for compressor temperature sensor and air conditioner - Google Patents

Detection method and detection device for compressor temperature sensor and air conditioner Download PDF

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Publication number
CN111550905B
CN111550905B CN202010290920.7A CN202010290920A CN111550905B CN 111550905 B CN111550905 B CN 111550905B CN 202010290920 A CN202010290920 A CN 202010290920A CN 111550905 B CN111550905 B CN 111550905B
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compressor
predetermined time
temperature
pressing
target
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CN111550905A (en
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孙义文
胡志文
韩劼成
王文洁
应必业
原惠惠
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

The invention provides a detection method and a detection device for a compressor temperature sensor and an air conditioner1Then, the first predetermined time t is obtained1Actual temperature T of compressor bodyPressing 1(ii) a The compressor is powered on for a second preset time t2Then, a second predetermined time t is obtained2Outdoor ambient temperature TOuter ringActual temperature T of compressor bodyPressing 2Compressor operating frequency F; according to TOuter ringAnd F, determining a second predetermined time t2Target discharge temperature T of compressorTarget exhaust(ii) a According to TPressing 2And TPressing 1、TOuter ring、TTarget exhaustWhether the comparison result meets the preset condition or not is judged to judge whether the temperature sensor of the compressor falls off or not. The detection method ensures the accuracy of judging the falling fault of the temperature sensor of the compressor, thereby being convenient for protecting the compressor in time and ensuring the reliability and the stability of the operation of the compressor.

Description

Detection method and detection device for compressor temperature sensor and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a detection method and a detection device of a compressor temperature sensor and an air conditioner.
Background
In the existing air conditioner, a temperature sensor is generally arranged at an exhaust pipe of the inverter compressor to ensure that the temperature of a compressor body is within 115 ℃, however, under some extreme working conditions, such as stop valve blockage, refrigerant loss and the like, the temperature at the exhaust pipe cannot be accurately monitored. In order to more accurately reflect the temperature of the compressor body, the temperature sensor is moved to the top cover of the compressor or the cylinder body of the compressor, after actual production and long-term use, high-temperature radiation and vibration generated by the compressor body have certain falling risks, if the temperature sensor falls off from the original position, the system cannot monitor the temperature of the compressor body, and certain influence is generated on the opening degree and the operating frequency of the electronic expansion valve, so that the system cannot normally operate.
Disclosure of Invention
The invention solves the problem of how to accurately judge whether the temperature sensor of the compressor falls off under the condition of not increasing the hardware structure.
In order to solve the above problems, the present invention provides a method for detecting a temperature sensor of a compressor, including: an acquisition step: the compressor is powered on for a first predetermined time t1Then, the first predetermined time t is obtained1Actual temperature T of compressor bodyPressing 1(ii) a The compressor is powered on for a second preset time t2Then, a second predetermined time t is obtained2Outdoor ambient temperature TOuter ringActual temperature T of compressor bodyPressing 2Compressor operating frequency F;
a calculation step: according to the outdoor ambient temperature TOuter ringAnd a compressor operating frequency F, determining a second predetermined time t2Target discharge temperature T of compressorTarget exhaust；
A judging step: judging the second predetermined time t2CompressorActual temperature T of bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Compressor body target temperature TPressing 2 targetA second predetermined time t2Target discharge temperature T of compressorTarget exhaustWhether the comparison result meets the preset condition or not is judged to determine whether the compressor temperature sensor falls off or not.
Further, the acquiring step further comprises: acquiring a second predetermined time t2Compressor voltage U and compressor current I;
the calculating step further comprises: according to a first predetermined time t1Actual temperature T of compressor bodyPressing 1A second predetermined time t2The compressor voltage U and the compressor current I, and calculating a second predetermined time t2Compressor body target temperature TPressing 2 target；
The judging step further comprises: judging the second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Compressor body target temperature TPressing 2 targetWhether the comparison result of (1) satisfies a preset condition.
Further, the first predetermined time t1Is in the range of 25s-35s, and the second predetermined time t2The value range of (A) is 2min-4 min.
Further, according to the first predetermined time t1Actual temperature T of compressor bodyPressing 1A second predetermined time t2Compressor voltage U and compressor current I, using the formula:
Tpressing 2 target＝(80％×UI)÷(C×M)+TPressing 1；
Calculating a second predetermined time t2Compressor body target temperature TPressing 2 target；
Wherein C is the specific heat capacity of the compressor motor winding, and M is the mass of the compressor motor winding.
Further, according to the outdoor ambient temperature TOuter ringAnd the running frequency F of the compressor, and inquiring the preset first in the air conditionerObtaining the maximum standard frequency F corresponding to the working condition by using a parameter relation tableStandard maxMinimum standard frequency FStandard minStandard exhaust temperature TStandard exhaustMinimum standard exhaust temperature TStandard exhaust min；
According to the maximum standard frequency FStandard maxMinimum standard frequency FStandard minStandard exhaust temperature TStandard exhaustMinimum standard exhaust temperature TStandard exhaust minAnd a compressor operating frequency F, using the formula:
Ttarget exhaust＝TStandard exhaust-(FStandard max-F)÷(FStandard max-FStandard min)×(TStandard exhaust-TStandard exhaust min)
Calculating a second predetermined time t2Target discharge temperature T of compressorTarget exhaust。
Further, if the comparison result in the judging step meets a preset condition, the condition that the temperature sensor of the compressor does not fall off is indicated, and the detection is finished; and if the comparison result in the judging step does not meet the preset condition, the condition that the compressor temperature sensor falls off is indicated, the air conditioner indoor unit displays a fault code, and the air conditioner outdoor unit is shut down for protection.
Further, the preset conditions are as follows:
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Is greater than a first preset threshold a, TPressing 2-TPressing 1The first preset threshold value A is greater than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2With outdoor ambient temperature TOuter ringIs greater than a second predetermined threshold B, i.e. TPressing 2-TOuter ringThe second preset threshold value B is larger than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Target discharge temperature T of compressorTarget exhaustAbsolute value of the third temperature differenceLess than a third predetermined threshold C, i.e. | TPressing 2-TTarget exhaust< third preset threshold C.
Further, the value ranges of the first preset threshold value A, the second preset threshold value B and the third preset threshold value C are 5-10 ℃.
Further, the preset conditions are as follows:
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Is greater than a first preset threshold a, TPressing 2-TPressing 1The first preset threshold value A is greater than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2With outdoor ambient temperature TOuter ringIs greater than a second predetermined threshold B, i.e. TPressing 2-TOuter ringThe second preset threshold value B is larger than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Target discharge temperature T of compressorTarget exhaustIs smaller than a third predetermined threshold value C, i.e. | TPressing 2-TTarget exhaustIf is less than a third preset threshold value C;
a second predetermined time t2Compressor body target temperature TPressing 2 targetAnd a second predetermined time t2Actual temperature T of compressor bodyPressing 2Is less than a fourth predetermined threshold D, i.e. TPressing 2 target-TPressing 2< fourth preset threshold D.
Further, the value ranges of the first preset threshold value A, the second preset threshold value B, the third preset threshold value C and the fourth preset threshold value D are 5-10 ℃.
The invention also provides a detection device of the compressor temperature sensor, which comprises an acquisition unit, a calculation unit and a judgment unit;
the acquisition unit is used for acquiring a first preset time t1Actual temperature T of compressor bodyPressing 1(ii) a For obtaining a second predetermined time t2Outdoor ambient temperature TOuter ringActual temperature T of compressor bodyPressing 2Compressor operating frequency F, compressor voltage U and compressor current I.
The computing unit is also used for calculating the outdoor environment temperature TOuter ringAnd a compressor operating frequency F, determining a second predetermined time t2Target discharge temperature T of compressorTarget exhaust；
The judging unit is used for judging the second preset time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Target discharge temperature T of compressorTarget exhaustWhether the comparison result meets the preset condition or not is judged to determine whether the temperature sensor of the compressor falls off or not.
Further, the obtaining unit is also used for obtaining a second preset time t2Compressor voltage U and compressor current I;
the computing unit is also used for calculating the first preset time t1Actual temperature T of compressor bodyPressing 1A second predetermined time t2The compressor voltage U and the compressor current I, and calculating a second predetermined time t2Compressor body target temperature TPressing 2 target；
The judging unit is also used for judging a second preset time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Compressor body target temperature TPressing 2 targetWhether the comparison result of (1) satisfies a preset condition.
The invention also provides an air conditioner which comprises the detection device of the compressor temperature sensor.
Further, the acquisition unit of the detection device comprises a compressor temperature sensor, and the compressor temperature sensor is arranged on a top cover of the compressor or a cylinder body of the compressor.
The detection method and the detection device of the compressor temperature sensor and the air conditioner have the following beneficial effects: whether the compressor temperature sensor falls or not is comprehensively judged according to the body temperature of the compressor, the outdoor environment temperature, the running frequency of the compressor, the voltage of the compressor and the current of the compressor, and the accuracy of judgment of the falling fault of the compressor temperature sensor is ensured, so that the compressor is protected in time, and the running reliability and stability of the compressor are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a detection method of a compressor temperature sensor according to a first embodiment;
fig. 2 is a schematic flow chart of a detection method of a compressor temperature sensor according to a second embodiment;
fig. 3 is a schematic diagram of functional units of a detecting device of a compressor temperature sensor according to a third embodiment.
Description of reference numerals:
100-an acquisition unit; 200-a computing unit; 300-a judging unit.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First embodiment
As shown in fig. 1, fig. 1 is a schematic flow chart of a detection method of a compressor temperature sensor according to a first embodiment; a detection method of a compressor temperature sensor comprises the following steps:
an acquisition step: the compressor is powered on for a first predetermined time t1Then, the first predetermined time t is obtained1Actual temperature T of compressor bodyPressing 1(ii) a The compressor is powered on for a second preset time t2Then, a second predetermined time t is obtained2Outdoor ambient temperature TOuter ringActual temperature T of compressor bodyPressing 2And a compressor operating frequency F.
The existing electric control system can monitor the current value of the compressor in real time, the detection process is carried out when the compressor is started each time and is synchronous with the operation of the whole air conditioner, and if the temperature sensor is determined not to fall off, the detection process is quitted, so that the normal work of the whole air conditioner is not influenced.
A temperature sensor is arranged on the top cover of the compressor or the cylinder body of the compressor and used for measuring the temperature of the compressor body; and the outdoor unit is provided with a temperature sensor for measuring the outdoor environment temperature.
First predetermined time t1Is in the range of 25-35s, preferably 30 s.
A second predetermined time t2The value range of (A) is 2min-4min, preferably 3 min.
A calculation step: according to the outdoor ambient temperature TOuter ringAnd a compressor operating frequency F, determining a second predetermined time t2Target discharge temperature T of compressorTarget exhaust。
According to the outdoor ambient temperature TOuter ringAnd the running frequency F of the compressor, inquiring a first parameter relation table preset in the air conditioner to obtain the corresponding maximum standard frequency F under the working conditionStandard maxMinimum standard frequency FStandard minStandard exhaust temperature TStandard exhaustMinimum standard exhaust temperature TStandard exhaust min；
The first parameter relation table is outdoor environment temperature TOuter ringCompressor operating frequency F and maximum standard frequency FStandard maxMinimum standard frequency FStandard minStandard exhaust temperature TStandard exhaustMinimum standard exhaust temperature TStandard exhaust minThe parameter relation table of (1).
According to the maximum standard frequency FStandard maxMinimum standard frequency FStandard minStandard exhaust temperature TStandard exhaustMinimum standard exhaust temperature TStandard exhaust minAnd compressionMachine operating frequency F, using the formula:
Ttarget exhaust＝TStandard exhaust-(FStandard max-F)÷(FStandard max-FStandard min)×(TStandard exhaust-TStandard exhaust min)
Calculating a second predetermined time t2Target discharge temperature T of compressorTarget exhaust。
A judging step: judging the second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Target discharge temperature T of compressorTarget exhaustWhether the comparison result meets the preset condition or not is judged to determine whether the temperature sensor of the compressor falls off or not.
If the second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Target discharge temperature T of compressorTarget exhaustIf the comparison result meets the preset condition, the temperature sensor is not fallen off, and the detection is finished; if the preset condition is not met, the temperature sensor is judged to fall off, the air conditioner indoor unit displays a fault code, and the air conditioner outdoor unit is shut down for protection.
The preset conditions are as follows:
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Is greater than a first preset threshold a, TPressing 2-TPressing 1The first preset threshold value A is greater than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2With outdoor ambient temperature TOuter ringIs greater than a second predetermined threshold B, i.e. TPressing 2-TOuter ringThe second preset threshold value B is larger than;
a second predetermined time t2Actual temperature of compressor bodyDegree TPressing 2And a second predetermined time t2Target discharge temperature T of compressorTarget exhaustIs smaller than a third predetermined threshold value C, i.e. | TPressing 2-TTarget exhaustIf is less than a third preset threshold value C;
the value ranges of the first preset threshold A, the second preset threshold B and the third preset threshold C are 5-10 ℃.
After the compressor is electrified and operated for a period of time, the temperature of the compressor body rises, and the operation frequency rises, so that the target exhaust temperature value of the compressor also rises, the temperature of the compressor body is higher than the outdoor environment temperature and is relatively close to the target exhaust temperature of the compressor, when the temperature sensor falls off or is inaccurate to detect, although the temperature detection can still be carried out, the temperature detected by the temperature sensor is greatly different from the actual temperature of the compressor body and is close to the outdoor environment temperature, and is also greatly different from the target exhaust temperature, therefore, if T is greater than T, the temperature of the compressor body is higher than the target exhaust temperaturePressing 2And TPressing 1、TOuter ringThe difference value is larger than the preset value, which shows that the numerical value detected by the temperature sensor can reflect the rising trend of the temperature of the compressor body; t isPressing 2And TTarget exhaustIs less than a predetermined value, TTarget exhaustAs theoretical temperature value, compressor body temperature and TTarget exhaustIs not large, so if T isPressing 2The difference value between the temperature sensor and the compressor is not large, the fact that the actual temperature of the compressor body can be accurately reflected by the detection value of the temperature sensor is shown, if the four difference values are within the preset range, the fact that the actual temperature of the compressor body can be accurately reflected by the detection value of the temperature sensor is shown, the fact that the temperature sensor does not fall off from the compressor and normally operates is shown, and no fault occurs.
Second embodiment
As shown in fig. 2, a method for detecting a temperature sensor of a compressor includes the following steps:
an acquisition step: the compressor is powered on for a first predetermined time t1Then, the first predetermined time t is obtained1Actual temperature T of compressor bodyPressing 1The compressor is powered on for a second predetermined time t2Then, a second pre-stage is obtainedAt a given time t2Outdoor ambient temperature TOuter ringActual temperature T of compressor bodyPressing 2Compressor operating frequency F, compressor voltage U and compressor current I.
A calculation step: according to the outdoor ambient temperature TOuter ringAnd a compressor operating frequency F, determining a second predetermined time t2Target discharge temperature T of compressorTarget exhaust(ii) a According to a first predetermined time t1Actual temperature T of compressor bodyPressing 1Compressor voltage U and compressor current I, calculating a second predetermined time t2Compressor body target temperature TPressing 2 target。
Using the formula: t isPressing 2 target＝(80％×UI)÷(C×M)+TPressing 1；
Calculating a second predetermined time t2Compressor body target temperature TPressing 2 target；
Wherein C is the specific heat capacity of the compressor motor winding, and M is the mass of the compressor motor winding.
A judging step: judging the second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Compressor body target temperature TPressing 2 targetA second predetermined time t2Target discharge temperature T of compressorTarget exhaustWhether the comparison result meets the preset condition or not is judged to determine whether the temperature sensor of the compressor falls off or not.
If the second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Compressor body target temperature TPressing 2 targetA second predetermined time t2Target discharge temperature T of compressorTarget exhaustIf the comparison result meets the preset condition, the temperature sensor is not fallen off, and the detection is finished; if the preset condition is not met, the temperature sensor is indicated to fall off, and the indoor unit of the air conditioner displays a faultAnd (4) carrying out shutdown protection on the outdoor unit of the air conditioner.
The preset conditions are as follows:
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Is greater than a first preset threshold a, TPressing 2-TPressing 1The first preset threshold value A is greater than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2With outdoor ambient temperature TOuter ringIs greater than a second predetermined threshold B, i.e. TPressing 2-TOuter ringThe second preset threshold value B is larger than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Target discharge temperature T of compressorTarget exhaustIs smaller than a third predetermined threshold value C, i.e. | TPressing 2-TTarget exhaustIf is less than a third preset threshold value C;
a second predetermined time t2Compressor body target temperature TPressing 2 targetAnd a second predetermined time t2Actual temperature T of compressor bodyPressing 2Is less than a fourth predetermined threshold D, i.e. TPressing 2 target-TPressing 2< fourth preset threshold D;
the value ranges of the first preset threshold A, the second preset threshold B, the third preset threshold C and the fourth preset threshold D are 5-10 ℃.
The second predetermined time t is added to the second embodiment as compared with the first embodiment2Compressor body target temperature TPressing 2 targetCalculation and judgment of, TPressing 2 targetIs a second predetermined time t2Theoretical temperature value of compressor body, second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Compressor body target temperature TPressing 2 targetIf the difference is not large, the detection value of the temperature sensor can accurately reflect the actual temperature of the compressor body, and if the four difference values are within the preset range, the detection value of the temperature sensor is indicatedThe actual temperature of the compressor body can be accurately reflected, the fact that the temperature sensor does not fall off from the compressor and normally operates is explained, no fault occurs, the accuracy degree of a four-dimensional comparison result is higher than that of a three-dimensional comparison result, and the fault tolerance rate is better.
Third embodiment
Referring to fig. 3, fig. 3 is a schematic diagram of functional units of a detecting device of a compressor temperature sensor according to a second embodiment of the present invention.
The detection device of the compressor temperature sensor comprises: an acquisition unit 100, a calculation unit 200, and a judgment unit 300;
the acquiring unit 100 is configured to acquire a first predetermined time t1Actual temperature T of compressor bodyPressing 1(ii) a For obtaining a second predetermined time t2Outdoor ambient temperature TOuter ringActual temperature T of compressor bodyPressing 2And a compressor operating frequency F.
The computing unit 200 is used for calculating the outdoor environment temperature TOuter ringAnd a compressor operating frequency F, determining a second predetermined time t2Target discharge temperature T of compressorTarget exhaust；
The judging unit 300 is used for judging the second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Target discharge temperature T of compressorTarget exhaustWhether the comparison result meets the preset condition or not is judged to judge whether the temperature sensor of the compressor falls off or not.
Further, the obtaining unit 100 is further configured to obtain a second predetermined time t2Compressor voltage U and compressor current I;
the calculation unit 200 is further configured to calculate a first predetermined time t1Actual temperature T of compressor bodyPressing 1A second predetermined time t2The compressor voltage U and the compressor current I, and calculating a second predetermined time t2Compressor body target temperature TPressing 2 target；
The determining unit 300 is further configured to determine a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Compressor body target temperature TPressing 2 targetWhether the comparison result of (1) satisfies a preset condition.
Fourth embodiment
The air conditioner comprises the detection device of the compressor temperature sensor, the acquisition unit comprises the compressor temperature sensor, and the compressor temperature sensor is arranged on a top cover of the compressor or a cylinder body of the compressor.
Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.
Compared with the prior art, the detection method, the detection device and the air conditioner of the compressor temperature sensor comprehensively judge whether the compressor temperature sensor falls off or not according to the body temperature of the compressor, the outdoor environment temperature, the compressor running frequency, the compressor voltage and the compressor current, and ensure the accuracy of judgment of the falling fault of the compressor temperature sensor, thereby being convenient for protecting the compressor in time and ensuring the reliability and the stability of the running of the compressor.
Finally, it should also be noted that, 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 necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description 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. The detection device for the compressor temperature sensor and the air conditioner disclosed in the third and fourth embodiments correspond to the detection method for the compressor temperature sensor disclosed in the first and second embodiments, so that the description is simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (12)

1. A method for detecting a temperature sensor of a compressor, comprising:
an acquisition step: the compressor is powered on for a first predetermined time t1Then, the first predetermined time t is obtained1Actual temperature T of compressor bodyPressing 1(ii) a The compressor is powered on for a second preset time t2Then, a second predetermined time t is obtained2Outdoor ambient temperature TOuter ringActual temperature T of compressor bodyPressing 2Compressor operating frequency F;
a calculation step: according to the outdoor ambient temperature TOuter ringAnd a compressor operating frequency F, determining a second predetermined time t2Target discharge temperature T of compressorTarget exhaust；
A judging step:judging the second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Compressor body target temperature TPressing 2 targetA second predetermined time t2Target discharge temperature T of compressorTarget exhaustWhether the comparison result meets the preset condition or not is judged to determine whether the temperature sensor of the compressor falls off or not;
the preset conditions are as follows:
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Is greater than a first preset threshold a, TPressing 2-TPressing 1The first preset threshold value A is greater than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2With outdoor ambient temperature TOuter ringIs greater than a second predetermined threshold B, i.e. TPressing 2-TOuter ringSecond preset threshold B:
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Target discharge temperature T of compressorTarget exhaustIs smaller than a third predetermined threshold value C, i.e. | TPressing 2-TTarget exhaustIf is less than a third preset threshold value C;
a second predetermined time t2Compressor body target temperature TPressing 2 targetAnd a second predetermined time t2Actual temperature T of compressor bodyPressing 2Is less than a fourth predetermined threshold D, i.e. TPressing 2 target-TPressing 2< fourth preset threshold D.
2. The detecting method of a compressor temperature sensor according to claim 1,
the step of obtaining further comprises: acquiring a second predetermined time t2Compressor voltage U and compressor current I;
the calculating step further comprises: according to a first predetermined time t1Actual temperature T of compressor bodyPressing 1A second predetermined time t2The compressor voltage U and the compressor current I, and calculating a second predetermined time t2Compressor body target temperature TPressing 2 target；
The judging step further comprises: judging the second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Compressor body target temperature TPressing 2 targetWhether the comparison result of (1) satisfies a preset condition.
3. A method for detecting a compressor temperature sensor as claimed in claim 1 or 2, wherein said first predetermined time t1Is in the range of 25s-35s, and the second predetermined time t2The value range of (A) is 2min-4 min.
4. A method for detecting a temperature sensor of a compressor as claimed in claim 2, wherein the first predetermined time t is based on1Actual temperature T of compressor bodyPressing 1A second predetermined time t2Compressor voltage U and compressor current I, using the formula:
Tpressing 2 target=（80%×UI）÷（C×M）+TPressing 1；
Calculating a second predetermined time t2Compressor body target temperature TPressing 2 target；
Wherein C is the specific heat capacity of the compressor motor winding, and M is the mass of the compressor motor winding.
5. The method for detecting a temperature sensor of a compressor according to claim 1 or 2, wherein:
according to the outdoor ambient temperature TOuter ringAnd the running frequency F of the compressor, inquiring a first parameter relation table preset in the air conditioner to obtain the corresponding maximum standard frequency F under the working conditionStandard maxMinimum standard frequency FStandard minStandard exhaust temperature TStandard exhaustMinimum, isStandard exhaust temperature TStandard exhaust min：
According to the maximum standard frequency FStandard maxMinimum standard frequency FStandard minStandard exhaust temperature TStandard exhaustMinimum standard exhaust temperature TStandard exhaust minAnd a compressor operating frequency F, using the formula:
Ttarget exhaust=TStandard exhaust-（FStandard max-F）÷（FStandard max-FStandard min）×（TStandard exhaust-TStandard exhaust min）
Calculating a second predetermined time t2Target discharge temperature T of compressorTarget exhaust。
6. The method as claimed in claim 1 or 2, wherein if the comparison result in the judging step meets a preset condition, the compressor temperature sensor is not dropped, and the detection is finished; and if the comparison result in the judging step does not meet the preset condition, the condition that the compressor temperature sensor falls off is indicated, the air conditioner indoor unit displays a fault code, and the air conditioner outdoor unit is shut down for protection.
7. The method as claimed in claim 1, wherein the first, second and third preset thresholds a, B and C have values in a range of 5-10 ℃.
8. The detecting method of a compressor temperature sensor according to claim 1,
the value ranges of the first preset threshold A, the second preset threshold B, the third preset threshold C and the fourth preset threshold D are 5-10 ℃.
9. The detection device of the compressor temperature sensor is characterized by comprising an acquisition unit (100), a calculation unit (200) and a judgment unit (300);
the acquisition unit (100) is usedAt the first predetermined time t1Actual temperature T of compressor bodyPressing 1(ii) a For obtaining a second predetermined time t2Outdoor ambient temperature TOuter ringActual temperature T of compressor bodyPressing 2Compressor operating frequency F, compressor voltage U and compressor current I;
the computing unit (200) is further configured to calculate a temperature T based on the outdoor ambient temperatureOuter ringAnd a compressor operating frequency F, determining a second predetermined time t2Target discharge temperature T of compressorTarget exhaust；
The judging unit (300) is used for judging the second preset time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Outdoor ambient temperature TOuter ringA second predetermined time t2Target discharge temperature T of compressorTarget exhaustWhether the comparison result meets the preset condition or not is judged to determine whether the temperature sensor of the compressor falls off or not;
the preset conditions are as follows:
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a first predetermined time t1Actual temperature T of compressor bodyPressing 1Is greater than a first preset threshold a, TPressing 2-TPressing 1The first preset threshold value A is greater than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2With outdoor ambient temperature TOuter ringIs greater than a second predetermined threshold B, i.e. TPressing 2-TOuter ringThe second preset threshold value B is larger than;
a second predetermined time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Target discharge temperature T of compressorTarget exhaustIs smaller than a third predetermined threshold value C, i.e. | TPressing 2-TTarget exhaustIf is less than a third preset threshold value C;
a second predetermined time t2Compressor body target temperature TPressing 2 targetAnd a second predetermined time t2Compressor body practiceTemperature TPressing 2Is less than a fourth predetermined threshold D, i.e. TPressing 2 target--TPressing 2< fourth preset threshold D.
10. The detecting device of a compressor temperature sensor according to claim 9, wherein:
the acquisition unit (100) is further configured to acquire a second predetermined time t2Compressor voltage U and compressor current I;
the calculation unit (200) is further configured to calculate a first predetermined time t1Actual temperature T of compressor bodyPressing 1A second predetermined time t2The compressor voltage U and the compressor current I, and calculating a second predetermined time t2Compressor body target temperature TPressing 2 target；
The judging unit (300) is also used for judging a second preset time t2Actual temperature T of compressor bodyPressing 2And a second predetermined time t2Compressor body target temperature TPressing 2 targetWhether the comparison result of (1) satisfies a preset condition.
11. An air conditioner characterized by comprising a detection device of a compressor temperature sensor according to claim 9 or 10.
12. Air conditioner according to claim 11, characterized in that the acquisition unit (100) of the detection means comprises a compressor temperature sensor, which is arranged on the compressor head or on the compressor cylinder.
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CN113739352B (en) * 2021-09-18 2022-10-28 宁波奥克斯电气股份有限公司 Air conditioner defrosting control method and device, storage medium and air conditioner

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