CN111197836A - Intelligent detection method for air conditioner sensor falling and air conditioner - Google Patents

Intelligent detection method for air conditioner sensor falling and air conditioner Download PDF

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Publication number
CN111197836A
CN111197836A CN201811378970.XA CN201811378970A CN111197836A CN 111197836 A CN111197836 A CN 111197836A CN 201811378970 A CN201811378970 A CN 201811378970A CN 111197836 A CN111197836 A CN 111197836A
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air conditioner
temperature
compressor
time
sensor
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李贺
朱恩选
王伟涛
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Aux Air Conditioning Co Ltd
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Aux Air Conditioning 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
    • F24F11/38—Failure diagnosis
    • 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
    • F24F11/62—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
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes

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  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an intelligent detection method for air conditioner sensor falling and an air conditioner, wherein the air conditioner comprises a compressor exhaust temperature sensor, an inner coil pipe temperature sensor and an outer coil pipe temperature sensor, and the intelligent detection method comprises the following steps: s1, when the compressor stop time is larger than W, acquiring the initial temperature of the compressor at the starting time; s2, judging whether the running state of the compressor meets a first preset condition, if so, executing a step S3, and if not, exiting the detection process; and S3, judging whether the sensor is likely to fall off or not according to the absolute value of the difference value between the real-time temperature and the initial temperature, if so, executing a verification program S4, and if not, exiting the detection process. The intelligent detection method can accurately detect whether the exhaust temperature sensor, the inner coil temperature sensor and the outer coil temperature sensor of the compressor are not inserted in place or fall off, remind a user of timely maintenance, avoid the damage or performance reduction of the whole air conditioner and improve the reliability of the air conditioner.

Description

Intelligent detection method for air conditioner sensor falling and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner sensor falling intelligent detection method and an air conditioner.
Background
The air conditioner is used to cool an indoor space in summer and to heat the indoor space in winter to make the indoor space comfortable. For this purpose, the air conditioner includes an outdoor unit installed outdoors and an indoor unit installed in an indoor space, and the air conditioner is generally provided with a plurality of temperature sensors, such as an indoor coil temperature sensor, an outdoor coil temperature sensor, and a compressor discharge temperature sensor. However, in the existing air conditioner, the condition that the sensor is not inserted in place often exists in mass production, or the phenomenon that the sensor loosens and falls off in the after-sale installation and maintenance process, so that the real temperature of the sensor cannot be detected in the actual use process, the judgment is abnormal in the operation of the whole air conditioner, the condition that the protection is not performed and the protection is not performed exists, the use effect of a client and the reliability of the whole air conditioner are influenced, and hidden dangers exist.
Disclosure of Invention
In view of the above, the present invention is directed to an air conditioner sensor falling intelligent detection method and an air conditioner, so as to solve the above problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an intelligent detection method for air conditioner sensor falling comprises a compressor exhaust temperature sensor, an inner coil pipe temperature sensor and an outer coil pipe temperature sensor, and comprises the following steps:
s1, when the compressor stop time is larger than W, acquiring the initial temperature of the compressor at the starting time;
s2, judging whether the running state of the compressor meets a first preset condition, if so, executing a step S3, and if not, exiting the detection process;
and S3, judging whether the sensor is likely to fall off or not according to the absolute value of the difference value between the real-time temperature and the initial temperature, if so, executing a verification program S4, and if not, exiting the detection process.
Further, the verification procedure S4 includes:
s41, the air conditioner controls the complete machine to be in fault shutdown, and controls to be restarted after a second preset time Y, and the initial temperature is obtained;
s42, judging whether the operation condition of the compressor meets a first preset condition, if so, executing a step S43, if not, continuing the current operation state, and exiting the detection process;
and S43, judging whether the absolute value of the difference between the real-time temperature and the initial temperature is smaller than a preset constant, if so, stopping the operation of the air conditioner and sending a corresponding fault indication, and if not, carrying out the fault indication.
Further, the first preset condition is that the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F, and the running current is greater than a first current threshold a.
Further, said S1 includes
S11, starting, communicating a power supply of the air conditioner, and ensuring the normal operation of the air conditioner;
s12, detecting whether the compressor stopping time is larger than W, if yes, executing a step S13, and if not, exiting the detection process;
and S13, acquiring the initial temperature detected by the sensor.
Further, the S3 includes:
s31, acquiring the real-time temperature of the compressor,
and S32, judging whether the absolute value of the difference value between the real-time temperature and the initial temperature is smaller than a preset constant, executing a verification program S4, and if not, exiting the detection process.
Further, when the temperature sensor is set as an external coil temperature sensor, the intelligent detection method comprises the following steps:
s1, when the compressor stop time is larger than W, acquiring the initial outer tube temperature T at the compressor starting timeOuter tube 0；
S2, judging whether the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is greater than a first current threshold A, if so, executing a step S31, and if not, exiting the detection process;
s31, acquiring real-time outer tube temperature TOuter tube 1；
S32, real-time outer tube temperature T according to the operation mode of the air conditionerOuter tube 1And initial outer tube temperature TOuter tube 0And detecting whether the sensor falls off or is not inserted in place or not by the absolute value of the difference, if so, executing a verification program S4, and if not, exiting the detection process.
Further, said S32 includes
S321, when the air conditioner operates in a refrigeration mode, judging the real-time outer tube temperature TOuter tube 1And initial outer tube temperature TOuter tube 0If the difference is smaller than the constant H, if so, executing a verification procedure S4, otherwise, exiting the detection process;
s322, when the air conditioner runs in the heating mode, judging the outdoor environment temperature TOuter ringIf the value is less than K, if so, the air conditioner continues to operate normally, the detection process is exited, and if not, the step S3220 is executed;
s3220, judging the initial outer tube temperature TOuter tube 0And real-time outer tube temperature TOuter tube 1If the difference is smaller than the constant I, if so, the verification procedure S4 is executed, otherwise, the detection procedure is exited.
Further, when the temperature sensor is set as a compressor discharge temperature sensor, the intelligent detection method comprises the steps of:
s11, starting, communicating a power supply of the air conditioner, and ensuring the normal operation of the air conditioner;
s12, detecting whether the compressor stopping time is larger than W, if yes, executing a step S13, and if not, exiting the detection process;
s13, acquiring initial exhaust temperature TExhaust gas 0；
S2, judging whether the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is greater than a first current threshold A, if so, executing a step S31, and if not, exiting the detection process;
s31, acquiring real-time exhaust temperature T of the compressorExhaust gas 1，
S32, judging real-time exhaust temperature TExhaust gas 1And initial exhaust temperature TExhaust gas 0If the difference is smaller than the constant B, if so, the verification procedure S4 is executed, otherwise, the detection procedure is exited.
Further, when the temperature sensor is set as an inner coil temperature sensor, the intelligent detection method comprises the following steps:
s11, starting, communicating a power supply of the air conditioner, and ensuring the normal operation of the air conditioner;
s12, detecting whether the compressor stopping time is larger than W, if yes, executing a step S13, and if not, exiting the detection process;
s13, acquiring initial inner tube temperature T in heating modeInner pipe 0；
S2, judging whether the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is greater than a first current threshold A, if so, executing a step S31, and if not, exiting the detection process;
s31, acquiring real-time inner tube temperature TInner pipe 1，
S32, judging the real-time inner tube temperature TInner pipe 1And initial inner tube temperature TInner pipe 0If the difference is smaller than the constant E, if yes, the verification procedure S4 is executed, otherwise, the detection procedure is exited.
Compared with the prior art, the intelligent detection method for the falling of the air conditioner sensor has the following advantages:
the intelligent detection method for the falling of the air conditioner sensor can accurately detect whether the exhaust temperature sensor, the inner coil temperature sensor and the outer coil temperature sensor of the compressor are not in place of insertion or fall off, is convenient for adjusting the running state of the air conditioner in time when detecting the fault of the temperature sensor, reminds a user of needing to maintain in time, avoids the damage of the whole machine or the performance reduction, and improves the reliability of the air conditioner.
The invention also provides an air conditioner, and the air conditioner adopts the intelligent detection method for the falling of the air conditioner sensor.
Compared with the prior art, the air conditioner and the intelligent detection method for the falling of the air conditioner sensor have the same advantages, and are not repeated herein.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic flow chart of an intelligent monitoring method for the falling of a compressor discharge temperature sensor according to an embodiment of the present invention;
FIG. 2 illustrates an intelligent method for monitoring the falling of an inner coil temperature sensor according to an embodiment of the present invention;
fig. 3 is a diagram illustrating an intelligent monitoring method for the falling of the external coil temperature sensor according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 3, the invention provides an intelligent monitoring method for air conditioner sensor falling, wherein the sensor comprises a compressor exhaust temperature sensor, an inner coil temperature sensor and an outer coil temperature sensor, and the intelligent monitoring method comprises the following steps:
s1, when the compressor stop time is larger than W, acquiring the initial temperature of the compressor at the starting time;
s2, judging whether the running state of the compressor meets a first preset condition, if so, executing a step S3, and if not, exiting the detection process;
and S3, judging whether the sensor is likely to fall off or not according to the absolute value of the difference value between the real-time temperature and the initial temperature, if so, executing a verification program S4, and if not, exiting the detection process.
Further, the verification procedure S4 includes
S41, the air conditioner controls the complete machine to be in fault shutdown, and controls to be restarted after a second preset time Y, and the initial temperature is obtained;
s42, judging whether the operation condition of the compressor meets a first preset condition, if so, executing a step S43, if not, continuing the current operation state, and exiting the detection process;
and S43, judging whether the absolute value of the difference between the real-time temperature and the initial temperature is smaller than a preset constant, if so, stopping the operation of the air conditioner and sending a corresponding fault indication, and if not, carrying out the fault indication.
Preferably, the intelligent detection method is started when the air conditioner is connected with a power supply and the compressor is stopped for more than W, and detection is not performed after a single detection process is finished. But when the fault indication inside the air conditioner is detected after the air conditioner is powered on, the detection process is not executed again until the air conditioner is powered on again and the inside of the air conditioner does not have the fault indication.
Example 1
As shown in fig. 1, the present embodiment provides an intelligent monitoring method for the falling of a compressor exhaust temperature sensor, which determines whether the exhaust temperature sensor is not plugged or has a falling fault according to a difference change between an initial exhaust temperature of the compressor and a real-time exhaust temperature when an operating condition of an air conditioner meets a preset condition, and then starts an intelligent protection measure for the air conditioner. The method specifically comprises the following steps:
and S11, opening and connecting the power supply of the air conditioner.
And S12, detecting whether the compressor stopping time is larger than W, if so, executing a step S13, and if not, exiting the detection process.
The stop time W is set according to the time that the refrigerant of the compressor can be recovered to the original state, and the following misjudgment caused by inaccurate exhaust temperature detected when the stop time of the compressor is short is avoided. Preferably, the downtime W is 20-40 min, and more preferably, the downtime W is set to be 30 min.
S13, starting a refrigeration or heating running mode of the air conditioner to obtain the initial exhaust temperature T of the compressorExhaust gas 0(ii) a At the moment, the compressor of the air conditioner is started, the air conditioner starts to perform heating or refrigerating operation according to a preset mode, and meanwhile, the initial exhaust temperature T at the starting moment of the compressor is obtainedExhaust gas 0。
The discharge temperature of the compressor is an important standard for measuring whether the compressor can run safely, when the discharge temperature of the compressor is higher, the compressor is overheated, and a control system of the air conditioner needs to control the compressor to stop and start protective measures. Therefore, it is necessary to accurately detect the discharge temperature of the compressor to avoid damage to the compressor.
S2, judging whether the running state of the compressor meets a first preset condition, if so, executing a step S31, if not, the air conditioner quits the detection process, and the compressor continues to run stably;
the first preset condition is as follows: the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F, and the running current is greater than a first current threshold A.
The first preset time X is set according to the performance of the compressor, generally, after the operating time of the compressor reaches the first preset time X, the operating state of the compressor tends to be stable, and the specific value X may be adjusted according to the configuration of the compressor.
Preferably, the first preset frequency threshold F and the first current threshold a are set according to a critical value that the compressor can safely operate, so that damage to the compressor is prevented.
When the running time of the compressor is detected to be greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is detected to be greater than a first current threshold A, the compressor meets the intelligent detection condition that the exhaust temperature sensor falls off, and a subsequent detection process can be carried out; when the operation condition of the compressor does not meet the first preset condition, the operation frequency of the compressor is low, even if the problem that the exhaust temperature sensor falls off occurs, the performance of the whole air conditioner cannot be greatly influenced, and at the moment, the air conditioner quits the detection process and continues to operate normally.
S31, acquiring real-time exhaust temperature T of the compressorExhaust gas 1，
S32, judging real-time exhaust temperature TExhaust gas 1And initial exhaust temperature TExhaust gas 0If yes, executing step S41 to perform further verification procedure, otherwise, indicating that the exhaust temperature sensor has no drop fault, and the air conditioner quits the detection flow;
preferably, the constant B is set according to a variation value of the discharge temperature when the compressor discharge temperature sensor is accurately installed at a designated position in a normal operation state of the air conditioner.
Under normal operating conditions, the compressor operates for a period of time and then the real-time discharge temperature TExhaust gas 1Initial exhaust temperature T from the moment of startExhaust gas 0The change is larger than that of the real-time exhaust temperature T after the first preset time X of the compressor operation, but when the exhaust temperature sensor has the falling fault, the detected exhaust temperature change is smallerExhaust gas 1And initial exhaust temperature TExhaust gas 0And judging whether the exhaust temperature sensor falls off or not. When real-time exhaust temperature TExhaust gas 1And initial exhaust temperature TExhaust gas 0When the difference value of (A) is less than the constant B, the phenomenon that the exhaust temperature sensor falls off possibly occurs, and the next verification is required; when the real-time exhaust temperature T is detectedExhaust gas 1And initial exhaust temperature TExhaust gas 0When the difference value is not less than the constant B, the exhaust temperature sensor works normally, the problem of falling is not caused, and the air conditioner quits the detection process at the moment.
S41, controlling the fault of the whole air conditionerStopping the compressor, controlling and restarting the compressor after a second preset time Y, and simultaneously obtaining the initial exhaust temperature T of the compressorExhaust gas 0；
The second preset time Y is set according to the configuration of the air conditioner, preferably set to be 3min, the control system in the air conditioner and the compressor are ensured to return to the initial state, and the interval time is prevented from being too short, so that the detected initial exhaust temperature T is enabled to be lowExhaust gas 0And the subsequent judgment error is caused to occur due to high, so that the air conditioner needs to be set to restart after the air conditioner is stopped for the second preset time Y.
S42, judging whether the operation condition of the compressor meets a first preset condition, if so, executing a step S431, if not, continuing the current operation state, and exiting the detection process;
s431, acquiring real-time exhaust temperature T of the compressorExhaust gas 1；
S432, judging real-time exhaust temperature TExhaust gas 1And initial exhaust temperature TExhaust gas 0If the difference value is smaller than the constant B, the problem that the exhaust temperature sensor is not inserted in place or falls off is judged, the control system controls the air conditioner to stop running and sends corresponding fault indication to the indoor unit, and the indoor unit displays a fault code; if not, the problem that the exhaust temperature sensor is not inserted in place or falls off is solved, and the air conditioner continues to operate normally without any fault indication.
After the exhaust temperature sensor is judged to be not in place in insertion or fall off, the air conditioner stops running to wait for an operator to maintain the exhaust temperature sensor, and in the process, the air conditioner does not automatically restart and can be recovered to run only by power-off or power-on operation.
The intelligent monitoring method for the falling of the compressor exhaust temperature sensor can accurately detect whether the exhaust temperature sensor of the compressor is not in place or falls off in a plugging mode, is convenient for adjusting the running state of the air conditioner in time when the fault of the exhaust temperature sensor is detected, reminds a user of needing to maintain in time, avoids the damage or performance reduction of the whole air conditioner, and improves the reliability of the air conditioner.
Example 2
As shown in fig. 2, this embodiment provides an intelligent monitoring method for falling of an inner coil temperature sensor, and under the condition that the operating condition of an air conditioner satisfies a preset condition, it is determined whether the inner coil temperature sensor has a problem that the inner coil temperature sensor cannot be inserted or falls off according to the variation value of the inner coil temperature, so as to start an intelligent protection measure for the air conditioner. The method specifically comprises the following steps:
and S11, opening and connecting the power supply of the air conditioner.
And S12, detecting whether the compressor stopping time is larger than W, if so, executing a step S13, and if not, exiting the detection process.
The stop time W is set according to the time that the refrigerant of the compressor can be recovered to the original state, so that the phenomenon that the temperature of the inner pipe detected when the stop time of the compressor is short is inaccurate, and subsequent misjudgment is caused is avoided. Preferably, the downtime W is 20-40 min, and more preferably, the downtime W is set to be 30 min.
S13, starting a refrigeration or heating operation mode of the air conditioner to obtain the initial inner pipe temperature T of the compressorInner pipe 0(ii) a At the moment, the compressor of the air conditioner is started, the air conditioner starts to perform heating or refrigerating operation according to a preset mode, and meanwhile, the inner coil temperature sensor detects the initial inner tube temperature T at the starting moment of the compressorInner pipe 0。
S2, judging whether the running state of the compressor meets a first preset condition, if so, executing a step S31, if not, the air conditioner quits the detection process, and the compressor continues to run stably;
the first preset condition is as follows: the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F, and the running current is greater than a first current threshold A.
The first preset time X is set according to the performance of the compressor, and generally, it is ensured that the operating state of the compressor tends to be stable after the operating time of the compressor reaches the first preset time X, and the first preset time X can be specifically adjusted according to the configuration of the compressor.
Preferably, the first preset frequency threshold F and the first current threshold a are set according to a critical value that the compressor can safely operate, so that damage to the compressor is prevented.
When the running time of the compressor is detected to be greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is detected to be greater than a first current threshold A, the condition that the falling intelligent detection of the inner tube temperature sensor is met is shown, and a subsequent detection process can be carried out; when the operation condition of the compressor does not meet the first preset condition, the operation frequency of the compressor is low, even if the problem that the inner pipe temperature sensor falls off occurs, the performance of the whole air conditioner cannot be greatly influenced, and at the moment, the air conditioner exits from the detection process and continues to operate normally.
S31, acquiring real-time inner tube temperature TInner pipe 1，
S32, judging the real-time inner tube temperature TInner pipe 1And initial inner tube temperature TInner pipe 0If yes, executing step S41 to perform further verification procedure, otherwise, indicating that the inner tube temperature sensor has no drop fault, and the air conditioner quits the detection flow;
preferably, the constant E is set according to a variation value of the temperature of the inner tube when the air conditioner is in a normal operating state and the inner tube temperature sensor is accurately installed at a designated position.
S41, the air conditioner controls the complete machine to be in fault shutdown, controls the complete machine to be restarted after a second preset time Y, and simultaneously obtains the initial inner pipe temperature TInner pipe 0；
The second preset time Y is set according to the configuration of the air conditioner, preferably set to be 3min, the control system in the air conditioner and the compressor are ensured to return to the initial state, and the interval time is prevented from being too short, so that the detected initial inner tube temperature T is ensured to be lowInner pipe 0And the subsequent judgment error is caused to occur due to high, so that the air conditioner needs to be set to restart after the air conditioner is stopped for the second preset time Y.
S42, judging whether the operation condition of the compressor meets a first preset condition, if so, executing a step S431, if not, continuing the current operation state, and exiting the detection process;
s431, acquiring real-time inner tube temperature TInner pipe 1；
S432, judging the real-time inner tube temperature TInner pipe 1And initial inner tube temperature TInner pipe 0If the difference value is smaller than the constant E, the problem that the inner pipe temperature sensor is not inserted in place or falls off is judged, the control system controls the air conditioner to stop running and sends out corresponding fault indication to the indoor unit, and the indoor unit displays a fault code; if not, the problem that the inner pipe temperature sensor is not inserted in place or falls off is solved, and the air conditioner continues to operate normally without any fault indication.
After the problem that the inner pipe temperature sensor is not in place in splicing or falls off is judged, the air conditioner stops running to wait for an operator to maintain the inner pipe temperature sensor, in the process, the air conditioner does not automatically restart, and the air conditioner can be recovered to run only by power-off or power-on operation.
The intelligent monitoring method for the falling of the inner pipe temperature sensor provided by the embodiment can accurately detect whether the inner pipe temperature sensor has the condition that the inner pipe temperature sensor cannot be inserted or falls off, is convenient for adjusting the running state of the air conditioner in time when the fault of the inner pipe temperature sensor is detected, reminds a user of needing to maintain in time, avoids the damage or performance reduction of the whole air conditioner, and improves the reliability of the air conditioner.
Example 3
As shown in fig. 3, this embodiment provides an intelligent monitoring method for the falling of an external coil temperature sensor, and under the condition that the operating condition of an air conditioner satisfies a preset condition, it is determined whether the external coil temperature sensor has a problem that the external coil temperature sensor cannot be inserted or falls off according to the variation value of the external coil temperature, so as to start an intelligent protection measure for the air conditioner. The method specifically comprises the following steps:
and S11, opening and connecting the power supply of the air conditioner.
And S12, detecting whether the compressor stopping time is larger than W, if so, executing a step S13, and if not, exiting the detection process.
The stop time W is set according to the time that the refrigerant of the compressor can be recovered to the original state, and the phenomenon that the detected temperature of the outer pipe is inaccurate when the stop time of the compressor is short, and subsequent misjudgment is caused is avoided. Preferably, the downtime W is 20-40 min, and more preferably, the downtime W is set to be 30 min.
S13, acquiring initial outer tube temperature T at the starting time of the compressorOuter tube 0；
At the moment, the compressor of the air conditioner is started, the air conditioner starts to perform heating or refrigerating operation according to a preset mode, and meanwhile, the compressor outer pipe temperature sensor detects the initial outer pipe temperature T at the starting moment of the compressorOuter tube 0。
S2, judging whether the running state of the compressor meets a first preset condition, if so, executing a step S31, if not, the air conditioner quits the detection process, and the compressor continues to run stably;
the first preset condition is as follows: the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F, and the running current is greater than a first current threshold A.
The first preset time X is set according to the performance of the compressor, and generally, it is ensured that the operating state of the compressor tends to be stable after the operating time of the compressor reaches the first preset time X, and the first preset time X can be specifically adjusted according to the configuration of the compressor.
Preferably, the first preset frequency threshold F and the first current threshold a are set according to a critical value that the compressor can safely operate, so that damage to the compressor is prevented.
When the running time of the compressor is detected to be greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is detected to be greater than a first current threshold A, the condition that the falling intelligent detection of the outer pipe temperature sensor of the compressor is met is shown, and a subsequent detection process can be carried out; when the operation condition of the compressor does not meet the first preset condition, the operation frequency of the compressor is low, even if the problem that the outer pipe temperature sensor falls off occurs, the performance of the whole air conditioner cannot be greatly influenced, and at the moment, the air conditioner quits the detection process and continues to operate normally.
S31, acquiring real-time outer tube temperature TOuter tube 1；
S321, judging a real-time outer tube when the air conditioner operates in a refrigeration modeTemperature TOuter tube 1And initial outer tube temperature TOuter tube 0If yes, executing step S4 to perform further verification procedure, otherwise, indicating that the outer tube temperature sensor has no drop fault, and the air conditioner exits the detection process;
s322, when the air conditioner runs in the heating mode, judging the outdoor environment temperature TOuter ringIf the value is less than K, if so, the air conditioner continues to operate normally, the detection process is exited, and if not, the step S3220 is executed;
s3220, judging the initial outer tube temperature TOuter tube 0And real-time outer tube temperature TOuter tube 1If yes, executing step S4, performing a further verification procedure S4, otherwise, indicating that the outer tube temperature sensor has no drop fault, and the air conditioner exits the detection process;
preferably, the constants H and I are set according to a variation value of the temperature of the outer tube when the outer tube temperature sensor is accurately installed at a designated position in a corresponding operation mode in a normal operation state of the air conditioner.
Under normal operating conditions, the compressor operates for a period of time and then the real-time outer tube temperature TOuter tube 1Initial outer tube temperature T from the moment of start-upOuter tube 0The change is larger than that of the compressor, but when the outer pipe temperature sensor has a falling fault, the detected outer pipe temperature change is smaller, and therefore the real-time outer pipe temperature T after the compressor operates for a period of time is detectedOuter tube 1And initial outer tube temperature TOuter tube 0And judging whether the exhaust temperature sensor falls off or not. As real time outer tube temperature TOuter tube 1And initial outer tube temperature TOuter tube 0When the absolute value of the difference is smaller than a preset constant, the phenomenon that the outer tube temperature sensor falls off possibly occurs, and the next verification is needed; when the real-time outer tube temperature T is detectedOuter tube 1And initial outer tube temperature TOuter tube 0When the absolute value of the difference value is not less than the preset constant, the normal work of the outer pipe temperature sensor is proved, the problem of falling-off does not occur, and the air conditioner quits the detection process at the moment.
S41, air conditioner control machineStopping the compressor, controlling to restart after a second preset time Y, and simultaneously acquiring the initial outer pipe temperature T of the compressorOuter tube 0；
The second preset time Y is set according to the configuration of the air conditioner, preferably set to be 3min, the control system in the air conditioner and the compressor are ensured to return to the initial state, and the interval time is prevented from being too short, so that the detected initial outer pipe temperature T is ensured to be too lowOuter tube 0And the subsequent judgment error is caused to occur due to high, so that the air conditioner needs to be set to restart after the air conditioner is stopped for the second preset time Y.
S42, judging whether the operation condition of the compressor meets a first preset condition, if so, executing a step S43, if not, continuing the current operation state, and exiting the detection process;
s431, acquiring real-time outer tube temperature TOuter tube 1，
S432, judging the temperature T of the outer pipe in the refrigeration modeOuter tube 1And initial outer tube temperature TOuter tube 0If the difference value is smaller than the constant H, the problem that the inner pipe temperature sensor is not inserted in place or falls off is judged, the control system controls the air conditioner to stop running and sends out corresponding fault indication to the indoor unit, and the indoor unit displays a fault code; if not, the problem that the outer pipe temperature sensor is not inserted in place or falls off is solved, and the air conditioner continues to operate normally without any fault indication.
Judging initial outer tube temperature T under heating modeOuter tube 0And real-time outer tube temperature TOuter tube 1If the difference value is smaller than the constant I, the problem that the outer pipe temperature sensor is not inserted in place or falls off is judged, the control system controls the air conditioner to stop running and sends out corresponding fault indication to the indoor unit, and the indoor unit displays a fault code; if not, the problem that the outer pipe temperature sensor is not inserted in place or falls off is solved, and the air conditioner continues to operate normally without any fault indication.
After the problem that the outer pipe temperature sensor is not in place in splicing or falls off is judged, the air conditioner stops running to wait for an operator to maintain the outer pipe temperature sensor, in the process, the air conditioner does not automatically restart, and the air conditioner can be recovered to run only by power-off or power-on operation.
The invention further provides an air conditioner which uses the intelligent detection method for the falling of the air conditioner sensor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The intelligent detection method for the falling of the sensor of the air conditioner is characterized by comprising a compressor exhaust temperature sensor, an inner coil pipe temperature sensor and an outer coil pipe temperature sensor, and comprises the following steps:
s1, when the compressor stop time is larger than W, acquiring the initial temperature of the compressor at the starting time;
s2, judging whether the running state of the compressor meets a first preset condition, if so, executing a step S3, and if not, exiting the detection process;
and S3, judging whether the sensor is likely to fall off or not according to the absolute value of the difference value between the real-time temperature and the initial temperature, if so, executing a verification program S4, and if not, exiting the detection process.
2. The intelligent detection method for sensor drop of air conditioner as claimed in claim 1, wherein said verification procedure S4 includes:
s41, the air conditioner controls the complete machine to be in fault shutdown, and controls to be restarted after a second preset time Y, and the initial temperature is obtained;
s42, judging whether the operation condition of the compressor meets a first preset condition, if so, executing a step S43, if not, continuing the current operation state, and exiting the detection process;
and S43, judging whether the absolute value of the difference between the real-time temperature and the initial temperature is smaller than a preset constant, if so, stopping the operation of the air conditioner and sending a corresponding fault indication, and if not, carrying out the fault indication.
3. The intelligent detection method for sensor drop of air conditioner according to claim 1 or 2, wherein the first preset condition is that the compressor running time is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F, and the running current is greater than a first current threshold a.
4. The intelligent sensor drop detection method for air conditioners as claimed in claim 1, wherein the step S1 includes
S11, opening, and connecting the power supply of the air conditioner;
s12, detecting whether the compressor stopping time is larger than W, if yes, executing a step S13, and if not, exiting the detection process;
and S13, acquiring the initial temperature detected by the sensor.
5. The air conditioner sensor drop intelligent detection method according to claim 1, wherein the S3 includes:
s31, acquiring the real-time temperature of the compressor,
and S32, judging whether the absolute value of the difference value between the real-time temperature and the initial temperature is smaller than a preset constant, executing a verification program S4, and if not, exiting the detection process.
6. The intelligent sensor drop detection method for the air conditioner as claimed in claim 3, wherein when the temperature sensor is set as an external coil temperature sensor, the intelligent detection method comprises the steps of:
s1, when the compressor stop time is larger than W, acquiring the initial outer tube temperature T at the compressor starting timeOuter tube 0；
S2, judging whether the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is greater than a first current threshold A, if so, executing a step S31, and if not, exiting the detection process;
s31, acquiring real-time outer tube temperature TOuter tube 1；
S32, real-time outer tube temperature T according to the operation mode of the air conditionerOuter tube 1And initial outer tube temperature TOuter tube 0And detecting whether the sensor falls off or is not inserted in place or not by the absolute value of the difference, if so, executing a verification program S4, and if not, exiting the detection process.
7. The intelligent sensor drop detection method for air conditioners as claimed in claim 6, wherein the step S32 includes
S321, when the air conditioner operates in a refrigeration mode, judging the real-time outer tube temperature TOuter tube 1And initial outer tube temperature TOuter tube 0If the difference is smaller than the constant H, if so, executing a verification procedure S4, otherwise, exiting the detection process;
s322, when the air conditioner runs in the heating mode, judging the outdoor environment temperature TOuter ringIf the value is less than K, if so, the air conditioner continues to operate normally, the detection process is exited, and if not, the step S3220 is executed;
s3220, judging the initial outer tube temperature TOuter tube 0And real-time outer tube temperature TOuter tube 1If the difference is smaller than the constant I, if so, the verification procedure S4 is executed, otherwise, the detection procedure is exited.
8. The intelligent sensor drop detection method for the air conditioner as claimed in claim 3, wherein when the temperature sensor is set as a compressor discharge temperature sensor, the intelligent detection method comprises the steps of:
s11, opening, and connecting the power supply of the air conditioner;
s12, detecting whether the compressor stopping time is larger than W, if yes, executing a step S13, and if not, exiting the detection process;
s13, acquiring initial exhaust temperature TExhaust gas 0；
S2, judging whether the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is greater than a first current threshold A, if so, executing a step S31, and if not, exiting the detection process;
s31, acquiring real-time exhaust temperature T of the compressorExhaust gas 1，
S32, judging real-time exhaust temperature TExhaust gas 1And initial exhaust temperature TExhaust gas 0If the difference is smaller than the constant B, if so, the verification procedure S4 is executed, otherwise, the detection procedure is exited.
9. The intelligent sensor drop detection method for the air conditioner as claimed in claim 3, wherein when the temperature sensor is set as an inner coil temperature sensor, the intelligent detection method comprises the steps of:
s11, opening, and connecting the power supply of the air conditioner;
s12, detecting whether the compressor stopping time is larger than W, if yes, executing a step S13, and if not, exiting the detection process;
s13, acquiring initial inner tube temperature T in heating modeInner pipe 0；
S2, judging whether the running time of the compressor is greater than a first preset time X, the running frequency is not less than a first preset frequency threshold F and the running current is greater than a first current threshold A, if so, executing a step S31, and if not, exiting the detection process;
s31, acquiring real-time inner tube temperature TInner pipe 1，
S32, judging the real-time inner tube temperature TInner pipe 1And initial inner tube temperature TInner pipe 0If the difference is smaller than the constant E, if yes, the verification procedure S4 is executed, otherwise, the detection procedure is exited.
10. An air conditioner characterized in that the intelligent detection method for air conditioner sensor falling off as claimed in any one of claims 1 to 9 is adopted.
CN201811378970.XA 2018-11-19 2018-11-19 Intelligent detection method for air conditioner sensor falling and air conditioner Pending CN111197836A (en)

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Application publication date: 20200526