CN107631413B - Method and device for detecting loosening fault of exhaust temperature sensor and air conditioner - Google Patents
Method and device for detecting loosening fault of exhaust temperature sensor and air conditioner Download PDFInfo
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- CN107631413B CN107631413B CN201710849626.3A CN201710849626A CN107631413B CN 107631413 B CN107631413 B CN 107631413B CN 201710849626 A CN201710849626 A CN 201710849626A CN 107631413 B CN107631413 B CN 107631413B
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Abstract
The invention provides an exhaust temperature sensor loosening fault detection method and device and an air conditioner. The method for detecting the loosening fault of the exhaust temperature sensor comprises the following steps: when the air conditioner is started to perform cooling or heating operation, detecting the outdoor environment temperature, setting the operation frequency of the compressor according to the outdoor environment temperature, and detecting the initial exhaust temperature of the compressor; when the operating frequency of the compressor is greater than a first preset frequency, judging whether the exhaust temperature sensor is loosened or failed according to the difference value between the exhaust temperature of the compressor detected after the compressor is started to operate for a first preset time and the initial exhaust temperature of the compressor. According to the technical scheme, whether the loosening fault exists in the exhaust temperature sensor is judged according to the change condition of the exhaust temperature, so that the working parameters of the air conditioner can be adjusted in time when the loosening fault occurs or a user is reminded to check whether the loosening fault occurs in the exhaust temperature sensor in time, and the irreversible damage or performance reduction of the whole machine is prevented.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and more particularly, to an exhaust temperature sensor release fault detection method, an exhaust temperature sensor release fault detection apparatus, an air conditioner, a computer device, and a computer-readable storage medium.
Background
At present, there are many inverter air conditioners which adjust the frequency by detecting the discharge temperature of a compressor, and if the inverter air conditioners use an electronic expansion and throttling device, the opening degree of an electronic expansion valve is also adjusted according to the detected discharge temperature, so that the air conditioners are in an optimal operation state. General producer can prevent to drop through the jump ring card with exhaust temperature sensor on the compressor blast pipe, but can not get rid of the condition that the accident leads to exhaust temperature sensor to loosen in transportation, installation. If the system loosens, the exhaust temperature that the system detected will be in lower horizontality for a long time (being close to ambient temperature), and electronic expansion valve will receive wrong instruction, and the aperture reduces all the time, and consequently, the actual exhaust temperature of compressor will be greater than the normal value far away, if do not have corresponding safeguard measure, then exhaust temperature too high can appear, and the inside temperature of compressor is too high, and refrigeration effect descends or even the compressor body damages scheduling problem.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
To this end, an object of a first aspect of the present invention is to provide an exhaust gas temperature sensor release failure detection method.
An object of a second aspect of the present invention is to provide an exhaust gas temperature sensor release failure detection device.
It is an object of a third aspect of the present invention to provide an air conditioner.
It is an object of a fourth aspect of the invention to provide a computer apparatus.
It is an object of a fifth aspect of the present invention to provide a computer-readable storage medium.
In order to achieve the above object, a technical solution of a first aspect of the present invention provides a loosening fault detection method for an exhaust temperature sensor, which is applicable to an air conditioner, where the air conditioner includes a compressor and an electronic expansion valve, the exhaust temperature sensor is disposed at an exhaust port of the compressor, and the loosening fault detection method includes: when the air conditioner is started to perform cooling or heating operation, detecting the outdoor environment temperature, setting the operation frequency of the compressor according to the outdoor environment temperature, and detecting the initial exhaust temperature of the compressor; judging whether the running frequency of the compressor is greater than a first preset frequency or not; if not, the loosening fault detection is not carried out before the next startup; if yes, detecting the exhaust temperature of the compressor after starting and running for a first preset time; and judging whether the exhaust temperature sensor is loosened or not according to the difference value between the exhaust temperature of the compressor detected after the compressor is started and operated for a first preset time and the initial exhaust temperature of the compressor.
According to the method for detecting the loosening fault of the exhaust temperature sensor, the air conditioner is started to refrigerate (or heat), the system detects the outdoor environment temperature according to the conventional control rule, the most proper operation frequency of the compressor is selected according to the outdoor environment temperature, whether the operation frequency is greater than the preset frequency (such as 30HZ) or not is judged, if not, the subsequent loosening fault detection is not carried out before the next starting, and because the frequency of the compressor is low, even if the loosening fault of the exhaust temperature sensor occurs, the performance of the whole machine cannot be greatly influenced; if the running frequency of the compressor is greater than the preset frequency, the next judgment is needed; after the air conditioner is started and operated for a first preset time, the first preset time is preferably longer than 10 minutes, the temperature sensed by the exhaust temperature sensor is detected, whether the exhaust temperature sensor is in loosening fault or not is judged according to the difference value of the exhaust temperatures sensed by the exhaust temperature sensor at intervals of the first preset time, if the difference value of the exhaust temperatures is large, namely the change of the exhaust temperatures is large, the situation that the exhaust temperature sensor is not loosened is indicated, the subsequent loosening fault detection is not carried out before the next start, and if the difference value of the exhaust temperatures is small, the loosening fault possibly exists in the exhaust temperature sensor, so that when the loosening fault occurs, the working parameters of the air conditioner are adjusted in time or a user is reminded to check whether the loosening fault or not occurs in time, and therefore the whole air conditioner is prevented from being irreversibly damaged or from being degraded in performance.
In addition, the method for detecting the loosening fault of the exhaust temperature sensor provided by the technical scheme of the invention also has the following additional technical characteristics:
in the above technical solution, the determining whether the exhaust temperature sensor has a loose fault according to the difference between the exhaust temperature of the compressor detected after the compressor is started to operate for a first preset time and the initial exhaust temperature of the compressor specifically includes: judging whether the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor detected after the compressor is started and operated for a first preset time is smaller than a first preset temperature difference or not; if not, the loosening fault detection is not carried out before the next startup; if so, detecting the opening degree of the electronic expansion valve, and detecting the exhaust temperature of the compressor and the opening degree of the electronic expansion valve after starting up and running for a second preset time; judging whether the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is smaller than a second preset temperature difference or not; if not, the loosening fault detection is not carried out before the next startup; if so, judging whether the absolute value of the difference value between the opening degree of the electronic expansion valve after the second preset time period of starting operation and the opening degree of the electronic expansion valve after the first preset time period of starting operation is greater than the preset opening degree difference; if not, the loosening fault detection is not carried out before the next startup; if yes, judging the loosening fault of the exhaust temperature sensor.
In the technical scheme, when the absolute value of the difference value of the exhaust temperature sensed by the exhaust temperature sensor at a first preset time interval is smaller than a first preset temperature difference, the opening degree of the electronic expansion valve at the moment needs to be detected, and subsequent judgment is carried out; after the second preset time period of starting operation, the second preset time period is preferably more than 30 minutes and less than 60 minutes, detecting the exhaust temperature sensed by the exhaust temperature sensor, meanwhile, judging whether the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is less than the second preset temperature difference, if not, indicating that the exhaust temperature sensor is not loosened, and no subsequent loosening fault detection is performed before starting operation next time; if so, detecting the opening degree of the electronic expansion valve at the moment, carrying out subsequent judgment, judging whether the exhaust temperature sensor is loosened according to the change condition of the opening degree of the electronic expansion valve, judging whether the absolute value of the difference value between the opening degree of the electronic expansion valve after the electronic expansion valve is started for running for the second preset time and the opening degree of the electronic expansion valve after the electronic expansion valve is started for running for the first preset time is larger than the preset opening degree difference, if so, judging that the exhaust temperature sensor is loosened and faulted, wherein the exhaust temperature is greatly changed due to the large change of the opening degree of the electronic expansion valve, and the actually detected exhaust temperature is changed very little, so that the loosening fault of the exhaust temperature sensor can be; if not, the opening degree of the electronic expansion valve is changed, the exhaust temperature is correspondingly changed, at this time, it can be basically determined that the release fault does not occur in the exhaust temperature sensor, and the release fault detection is not performed before the next start-up.
In any of the above technical solutions, after determining that the exhaust temperature sensor has a loosening fault, the method further includes: and locking the opening degree of the electronic expansion valve to a preset opening degree, and simultaneously locking the frequency of the compressor to a second preset frequency.
When the loosening fault of the exhaust temperature sensor is judged, the opening degree of the electronic expansion valve is locked to a preset opening degree in time, the preset opening degree is preferably larger than 300 steps, and the frequency of the compressor is locked to a second preset frequency, and the second preset frequency is preferably smaller than 30 HZ.
In any of the above technical solutions, after determining that the exhaust temperature sensor has a loosening fault, the method further includes: outputting a loosening fault code; and/or send out an alarm prompt.
When judging that the exhaust temperature sensor has loosen the trouble, output pine and take off the trouble code or send the warning suggestion simultaneously to maintenance personal in time looks over or learn the trouble reason, thereby in time install fixedly again exhaust temperature sensor.
The technical solution of the second aspect of the present invention provides an exhaust temperature sensor loosening fault detection device, which is suitable for an air conditioner, wherein the air conditioner comprises a compressor and an electronic expansion valve, an exhaust temperature sensor is arranged at an exhaust port of the compressor, and the loosening fault detection device comprises: the first detection module is used for detecting the outdoor environment temperature and setting the operation frequency of the compressor according to the outdoor environment temperature when the air conditioner is started for refrigeration or heating operation, and simultaneously detecting the initial exhaust temperature of the compressor; the first judgment module is used for judging whether the running frequency of the compressor is greater than a first preset frequency or not; the first control module is used for stopping loosening fault detection when the running frequency of the compressor is not more than the first preset frequency; the first control module is also used for starting a second detection module when the running frequency of the compressor is greater than the first preset frequency; the second detection module is used for detecting the exhaust temperature of the compressor after the compressor is started to operate for a first preset time; and the second control module is used for judging whether the exhaust temperature sensor is loosened or not according to the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor, which is detected after the compressor is started to operate for a first preset time.
In the above technical solution, the exhaust temperature sensor loosening fault detection device further includes: the second judgment module is used for judging whether the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor detected after the starting operation is carried out for a first preset time is smaller than a first preset temperature difference or not; the second control module is used for stopping loosening fault detection when the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor detected after the compressor is started and operated for a first preset time length is not less than a first preset temperature difference; the second control module is also used for starting a third detection module when the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor, which is detected after the compressor is started and operated for a first preset time length, is smaller than a first preset temperature difference; the third detection module is used for detecting the opening degree of the electronic expansion valve after the first preset time of starting operation and is also used for detecting the exhaust temperature of the compressor and the opening degree of the electronic expansion valve after the second preset time of starting operation; the third judgment module is used for judging whether the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is smaller than a second preset temperature difference or not; the third control module is used for stopping loosening fault detection when the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is not less than the second preset temperature difference; the third control module is also used for starting a fourth judgment module when the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is less than the second preset temperature difference; the fourth judging module is used for judging whether the absolute value of the difference value between the opening degree of the electronic expansion valve after the first preset time period of starting operation and the opening degree of the electronic expansion valve after the second preset time period of starting operation is greater than the preset opening degree difference or not; the fourth control module is used for stopping loosening fault detection when the absolute value of the difference value between the opening degree of the electronic expansion valve after the second preset time period of starting operation and the opening degree of the electronic expansion valve after the first preset time period of starting operation is not more than the preset opening degree difference; the fourth control module is further used for judging that the release fault of the exhaust temperature sensor is caused when the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is greater than the second preset temperature difference.
In any one of the above technical solutions, the exhaust gas temperature sensor loosening fault detection apparatus further includes: and the fault processing module is used for locking the opening degree of the electronic expansion valve to a preset opening degree and locking the frequency of the compressor to a second preset frequency after judging that the exhaust temperature sensor has a loosening fault.
In any one of the above technical solutions, the exhaust temperature sensor loosening fault detection apparatus further includes: and the fault processing module is used for outputting a loosening fault code and/or sending an alarm prompt after judging the loosening fault of the exhaust temperature sensor.
The technical scheme of the third aspect of the invention provides an air conditioner, which comprises a compressor, a condenser, an electronic expansion valve and an evaporator which are connected through pipelines, wherein an exhaust temperature sensor is arranged at an exhaust port of the compressor, and the air conditioner further comprises an exhaust temperature sensor loosening fault detection device in any one of the technical schemes.
According to the air conditioner provided by the technical scheme of the invention, because the air conditioner comprises the exhaust temperature sensor loosening fault detection device in any technical scheme, whether the exhaust temperature sensor is loosened or not can be well detected and processed, so that the damage of the compressor due to overhigh exhaust temperature is avoided, and the service life of the compressor is prolonged.
An aspect of the fourth aspect of the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for detecting loosening failure of an exhaust gas temperature sensor according to any one of the above aspects.
An aspect of the fifth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the exhaust gas temperature sensor release failure detection method according to any one of the above-mentioned aspects.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow diagram of a method for detecting a release failure of an exhaust temperature sensor according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for detecting a release failure of an exhaust temperature sensor according to another embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for detecting a release failure of an exhaust temperature sensor according to yet another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an exhaust gas temperature sensor release failure detection apparatus according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the names of the components in fig. 4 is:
the device comprises an exhaust temperature sensor loosening fault detection device, a first detection module 12, a first judgment module 14, a first control module 16, a second detection module 18, a second judgment module 20, a second control module 22, a third detection module 24, a third judgment module 26, a third control module 28, a fourth judgment module 30 and a fourth control module 32.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
An exhaust temperature sensor release failure detection method, an exhaust temperature sensor release failure detection method apparatus, and an air conditioner according to some embodiments of the present invention will be described below with reference to fig. 1 to 4.
As shown in fig. 1, according to some embodiments of the present invention, a release fault detection method for an exhaust temperature sensor is provided, which is suitable for an air conditioner, where the air conditioner includes a compressor and an electronic expansion valve, and an exhaust temperature sensor is disposed at an exhaust port of the compressor, and the release fault detection method includes the following steps:
s102, detecting the outdoor environment temperature and setting the operation frequency of the compressor according to the outdoor environment temperature when the air conditioner is started for refrigeration or heating operation, and detecting the initial exhaust temperature of the compressor;
s104, judging whether the running frequency of the compressor is greater than a first preset frequency or not;
s106, if not, the loosening fault detection is not carried out before the next startup;
s108, if yes, detecting the exhaust temperature of the compressor after the compressor is started and operates for a first preset time;
and S110, judging whether the exhaust temperature sensor is loosened or not according to the difference value between the exhaust temperature of the compressor detected after the compressor is started and operated for the first preset time and the initial exhaust temperature of the compressor.
In the method for detecting loosening faults of the exhaust temperature sensor provided by the embodiment of the invention, the air conditioner is started for refrigeration (or heating), the system detects the outdoor environment temperature according to the conventional control rule, the most appropriate operation frequency of the compressor is selected according to the outdoor environment temperature, and whether the operation frequency is greater than the preset frequency (such as 30HZ) or not is judged, if not, the subsequent loosening fault detection is not carried out before the next startup, because the frequency of the compressor is low, even if the loosening fault of the exhaust temperature sensor occurs, the performance of the whole machine cannot be greatly influenced; if the running frequency of the compressor is greater than the preset frequency, the next judgment is needed; after the air conditioner is started and operated for a first preset time, the first preset time is preferably longer than 10 minutes, the temperature sensed by the exhaust temperature sensor is detected, whether the exhaust temperature sensor is in loosening fault or not is judged according to the difference value of the exhaust temperatures sensed by the exhaust temperature sensor at intervals of the first preset time, if the difference value of the exhaust temperatures is large, namely the change of the exhaust temperatures is large, the situation that the exhaust temperature sensor is not loosened is indicated, the subsequent loosening fault detection is not carried out before the next start, and if the difference value of the exhaust temperatures is small, the loosening fault possibly exists in the exhaust temperature sensor, so that when the loosening fault occurs, the working parameters of the air conditioner are adjusted in time or a user is reminded to check whether the loosening fault or not occurs in time, and therefore the whole air conditioner is prevented from being irreversibly damaged or from being degraded in performance.
In an embodiment of the present invention, as shown in fig. 2, the determining whether the exhaust temperature sensor has a loosening fault according to a difference between the exhaust temperature of the compressor detected after the compressor is started for a first preset time and the initial exhaust temperature of the compressor specifically includes:
s202, judging whether the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor detected after the starting operation is carried out for a first preset time is smaller than a first preset temperature difference or not;
s204, if not, the loosening fault detection is not carried out before the next startup;
s206, if yes, detecting the opening degree of the electronic expansion valve, and detecting the exhaust temperature of the compressor and the opening degree of the electronic expansion valve after the compressor is started to operate for a second preset time;
s208, judging whether the absolute value of the difference value between the exhaust temperature of the compressor detected after the compressor is started to operate for the second preset time and the exhaust temperature of the compressor detected after the compressor is started to operate for the first preset time is smaller than a second preset temperature difference or not;
s210, if not, the loosening fault detection is not carried out before the next startup;
s212, if yes, judging whether the absolute value of the difference value between the opening degree of the electronic expansion valve after the first preset time period of starting operation and the opening degree of the electronic expansion valve after the second preset time period of starting operation is larger than the preset opening degree difference;
s214, if not, the loosening fault detection is not carried out before the next startup;
and S216, if so, judging that the exhaust temperature sensor is loosened and broken.
In this embodiment, when the absolute value of the difference between the exhaust temperatures sensed by the exhaust temperature sensor at a first preset time interval is smaller than a first preset temperature difference, the opening degree of the electronic expansion valve at that time needs to be detected, and subsequent judgment is performed; after the second preset time period of starting operation, the second preset time period is preferably more than 30 minutes and less than 60 minutes, detecting the exhaust temperature sensed by the exhaust temperature sensor, meanwhile, judging whether the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is less than the second preset temperature difference, if not, indicating that the exhaust temperature sensor is not loosened, and no subsequent loosening fault detection is performed before starting operation next time; if so, detecting the opening degree of the electronic expansion valve at the moment, carrying out subsequent judgment, judging whether the exhaust temperature sensor is loosened according to the change condition of the opening degree of the electronic expansion valve, judging whether the absolute value of the difference value between the opening degree of the electronic expansion valve after the electronic expansion valve is started for running for the second preset time and the opening degree of the electronic expansion valve after the electronic expansion valve is started for running for the first preset time is larger than the preset opening degree difference, if so, judging that the exhaust temperature sensor is loosened and faulted, wherein the exhaust temperature is greatly changed due to the large change of the opening degree of the electronic expansion valve, and the actually detected exhaust temperature is changed very little, so that the loosening fault of the exhaust temperature sensor can be; if not, the opening degree of the electronic expansion valve is changed, the exhaust temperature is correspondingly changed, at this time, it can be basically determined that the release fault does not occur in the exhaust temperature sensor, and the release fault detection is not performed before the next start-up.
In an embodiment of the present invention, as shown in fig. 3, after determining that the exhaust gas temperature sensor is loose, the method further includes: the opening degree of the electronic expansion valve is locked to a preset opening degree, and simultaneously the frequency of the compressor is locked to a second preset frequency.
When the loosening fault of the exhaust temperature sensor is judged, the opening degree of the electronic expansion valve is locked to a preset opening degree in time, the preset opening degree is preferably larger than 300 steps, and the frequency of the compressor is locked to a second preset frequency, and the second preset frequency is preferably smaller than 30 HZ.
In an embodiment of the present invention, as shown in fig. 3, after determining that the exhaust gas temperature sensor is loose, the method further includes: outputting a loosening fault code; and/or sending out an alarm prompt.
When judging that the exhaust temperature sensor has loosen the trouble, output pine and take off the trouble code or send the warning suggestion simultaneously to maintenance personal in time looks over or learn the trouble reason, thereby in time install fixedly again exhaust temperature sensor.
In one embodiment, as shown in fig. 3, the method for detecting an exhaust temperature sensor release failure includes the steps of:
s302, when the air conditioner is started to refrigerate or heat, detecting the outdoor environment temperature T and simultaneously detecting the initial exhaust temperature TP1 of the compressor;
s304, setting the running frequency P1 of the compressor according to the outdoor environment temperature T,
s306, judging whether the running frequency P1 of the compressor is greater than a first preset frequency;
s308, if not, the loosening fault detection is not carried out before the next startup;
s310, if yes, detecting the exhaust temperature TP2 of the compressor after the compressor is started to operate for a first preset time;
s312, judging whether the absolute value of TP2-TP1 is smaller than a first preset temperature difference or not;
s314, if not, the loosening fault detection is not carried out before the next startup;
s316, if yes, detecting the opening K1 of the electronic expansion valve;
s318, detecting the exhaust temperature TP3 of the compressor after the compressor is started and operates for a second preset time period;
s320, judging whether the absolute value of TP3-TP2 is smaller than a second preset temperature difference or not;
s322, if not, the loosening fault detection is not carried out before the next startup;
s324, if yes, detecting the opening K2 of the electronic expansion valve;
s326, judging whether the absolute value of K2-K1 is larger than a preset opening difference or not;
s328, if not, the loosening fault detection is not carried out before the next startup;
s330, if yes, judging the loosening fault of the exhaust temperature sensor;
s332, locking the opening degree of the electronic expansion valve to a preset opening degree, locking the frequency of the compressor to a second preset frequency, and reporting a loosening fault code.
As shown in fig. 4, an embodiment of a second aspect of the present invention provides an exhaust temperature sensor loosening fault detection device 1, which is suitable for an air conditioner, where the air conditioner includes a compressor and an electronic expansion valve, an exhaust temperature sensor is disposed at an exhaust port of the compressor, and the loosening fault detection device includes: the device comprises a first detection module 12, a first judgment module 14, a first control module 16, a second detection module 18 and a second control module 22.
Specifically, the first detecting module 12 is configured to detect an outdoor environment temperature and set an operation frequency of the compressor according to the outdoor environment temperature when the air conditioner is started for cooling or heating, and detect an initial exhaust temperature of the compressor; the first judging module 14 is configured to judge whether the operating frequency of the compressor is greater than a first preset frequency; the first control module 16 is configured to stop the loosening fault detection when the operating frequency of the compressor is not greater than a first preset frequency; the first control module 16 is further configured to start the second detection module 18 when the operating frequency of the compressor is greater than a first preset frequency; the second detection module 18 is used for detecting the exhaust temperature of the compressor after the compressor is started to operate for a first preset time; the second control module 22 is configured to determine whether the exhaust temperature sensor has a loose fault according to a difference between the exhaust temperature of the compressor detected after the first preset time period of startup operation and the initial exhaust temperature of the compressor.
In one embodiment of the present invention, as shown in fig. 4, the exhaust gas temperature sensor release failure detection device 1 further includes: a second determination module 20, a third detection module 24, a third determination module 26, a third control module 28, a fourth determination module 30, and a fourth control module 32.
Specifically, the second determining module 20 is configured to determine whether an absolute value of a difference between the discharge temperature of the compressor detected after the start-up operation for the first preset time period and the initial discharge temperature of the compressor is smaller than a first preset temperature difference; the second control module 22 is configured to stop the loosening fault detection when an absolute value of a difference between the discharge temperature of the compressor detected after the start-up operation for the first preset time period and the initial discharge temperature of the compressor is not less than a first preset temperature difference; the second control module 22 is further configured to start the third detection module 24 when the absolute value of the difference between the discharge temperature of the compressor detected after the start-up operation for the first preset time period and the initial discharge temperature of the compressor is smaller than the first preset temperature difference; the third detection module 24 is configured to detect an opening degree of the electronic expansion valve after a first preset time period of starting operation, and is further configured to detect an exhaust temperature of the compressor and an opening degree of the electronic expansion valve after a second preset time period of starting operation; the third judging module 26 is configured to judge whether an absolute value of a difference between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is less than a second preset temperature difference; the third control module 28 is configured to stop the loosening fault detection when an absolute value of a difference between the discharge temperature of the compressor detected after the second preset time period of starting operation and the discharge temperature of the compressor detected after the first preset time period of starting operation is not less than a second preset temperature difference; the third control module 28 is further configured to start the fourth determining module 30 when the absolute value of the difference between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is less than the second preset temperature difference; the fourth judging module 30 is configured to judge whether an absolute value of a difference between an opening degree of the electronic expansion valve after the first preset time period of the startup operation and an opening degree of the electronic expansion valve after the second preset time period of the startup operation is greater than a preset opening degree difference; the fourth control module 32 is configured to stop the loosening fault detection when an absolute value of a difference between an opening degree of the electronic expansion valve after the second preset time period of starting operation and an opening degree of the electronic expansion valve after the first preset time period of starting operation is not greater than a preset opening degree difference; the fourth control module 32 is further configured to determine that the discharge temperature sensor is released and fails when an absolute value of a difference between the discharge temperature of the compressor detected after the second preset time period of starting operation and the discharge temperature of the compressor detected after the first preset time period of starting operation is greater than a second preset temperature difference.
In one embodiment of the present invention, the exhaust gas temperature sensor release failure detection device 1 further includes: and the fault processing module is used for locking the opening degree of the electronic expansion valve to a preset opening degree and locking the frequency of the compressor to a second preset frequency after judging that the exhaust temperature sensor has the loosening fault.
In one embodiment of the present invention, the exhaust gas temperature sensor release failure detection device 1 further includes: and the fault processing module is used for outputting a loosening fault code and/or sending an alarm prompt after judging the loosening fault of the exhaust temperature sensor.
An embodiment of a third aspect of the present invention provides an air conditioner (not shown in the figures), comprising a compressor, a condenser, an electronic expansion valve and an evaporator connected by pipelines, wherein an exhaust temperature sensor is arranged at an exhaust port of the compressor, and the air conditioner further comprises an exhaust temperature sensor release fault detection device 1 as described in any one of the above embodiments.
The air conditioner provided by the above embodiment of the present invention includes the exhaust temperature sensor loosening fault detection device 1 according to any of the above embodiments, so that it is possible to perform very good detection and processing on whether the exhaust temperature sensor is loosened, so as to avoid damage to the compressor due to an excessively high exhaust temperature, and to prolong the service life of the compressor.
An embodiment of the fourth aspect of the present invention provides a computer device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for detecting an loosening failure of an exhaust gas temperature sensor according to any of the above embodiments.
Embodiments of the fifth aspect of the invention provide a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the exhaust gas temperature sensor release failure detection method according to any of the above embodiments.
In summary, the loosening fault detection method for the exhaust temperature sensor provided by the embodiment of the invention judges whether to perform subsequent loosening fault detection according to the starting operation frequency of the compressor; if the starting operation frequency of the compressor is greater than the preset frequency, judging whether the loosening fault occurs to the exhaust temperature sensor according to the change of the exhaust temperature of the compressor within the preset time; if the change of the exhaust temperature is small, whether the exhaust temperature sensor has a loosening fault is judged according to the change of the opening value of the electronic expansion valve in the preset time length, when the exhaust temperature sensor is judged to be loosened, the opening of the electronic expansion valve is locked to a relatively large preset opening value, the frequency of the compressor is locked to a relatively small operation frequency value, and meanwhile, the loosening fault is reported, so that the irreversible damage or the performance reduction of the whole machine is prevented.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a release fault detection method of exhaust temperature sensor, is applicable to the air conditioner, the air conditioner includes compressor and electronic expansion valve, the exhaust port department of compressor is equipped with exhaust temperature sensor, its characterized in that, release fault detection method includes:
when the air conditioner is started to perform cooling or heating operation, detecting the outdoor environment temperature, setting the operation frequency of the compressor according to the outdoor environment temperature, and detecting the initial exhaust temperature of the compressor;
judging whether the running frequency of the compressor is greater than a first preset frequency or not;
if not, the loosening fault detection is not carried out before the next startup;
if yes, detecting the exhaust temperature of the compressor after starting and running for a first preset time;
judging whether the exhaust temperature sensor is in loose failure or not according to the difference value between the exhaust temperature of the compressor detected after the compressor is started and operated for a first preset time and the initial exhaust temperature of the compressor;
the method comprises the following steps of judging whether the exhaust temperature sensor loosens or not according to the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor, which is detected after the compressor is started to operate for a first preset time, and specifically comprising the following steps:
judging whether the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor detected after the compressor is started and operated for a first preset time is smaller than a first preset temperature difference or not;
if not, the loosening fault detection is not carried out before the next startup;
if so, detecting the opening degree of the electronic expansion valve, and detecting the exhaust temperature of the compressor and the opening degree of the electronic expansion valve after starting up and running for a second preset time;
judging whether the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is smaller than a second preset temperature difference or not;
if not, the loosening fault detection is not carried out before the next startup;
if so, judging whether the absolute value of the difference value between the opening degree of the electronic expansion valve after the second preset time period of starting operation and the opening degree of the electronic expansion valve after the first preset time period of starting operation is greater than the preset opening degree difference;
if not, the loosening fault detection is not carried out before the next startup;
if yes, judging the loosening fault of the exhaust temperature sensor.
2. The exhaust temperature sensor release failure detection method according to claim 1, further comprising, after determining that the exhaust temperature sensor release failure is detected:
and locking the opening degree of the electronic expansion valve to a preset opening degree, and simultaneously locking the frequency of the compressor to a second preset frequency.
3. The exhaust temperature sensor release failure detection method according to claim 1, further comprising, after determining that the exhaust temperature sensor release failure is detected:
outputting a loosening fault code; and/or
And sending an alarm prompt.
4. The utility model provides an exhaust temperature sensor pine takes off fault detection device, is applicable to the air conditioner, the air conditioner includes compressor and electronic expansion valve, the gas vent department of compressor is equipped with exhaust temperature sensor, its characterized in that, the pine takes off fault detection device and includes:
the first detection module is used for detecting the outdoor environment temperature and setting the operation frequency of the compressor according to the outdoor environment temperature when the air conditioner is started for refrigeration or heating operation, and simultaneously detecting the initial exhaust temperature of the compressor;
the first judgment module is used for judging whether the running frequency of the compressor is greater than a first preset frequency or not;
the first control module is used for stopping loosening fault detection when the running frequency of the compressor is not more than the first preset frequency;
the first control module is also used for starting a second detection module when the running frequency of the compressor is greater than the first preset frequency;
the second detection module is used for detecting the exhaust temperature of the compressor after the compressor is started to operate for a first preset time;
the second control module is used for judging whether the exhaust temperature sensor is in loosening fault or not according to the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor detected after the compressor is started and operated for a first preset time;
the second judgment module is used for judging whether the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor detected after the starting operation is carried out for a first preset time is smaller than a first preset temperature difference or not;
the second control module is used for stopping loosening fault detection when the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor, which is detected after the compressor is started and operated for a first preset time length, is not less than the first preset temperature difference;
the second control module is also used for starting a third detection module when the absolute value of the difference value between the exhaust temperature of the compressor and the initial exhaust temperature of the compressor, which is detected after the compressor is started and operated for a first preset time length, is smaller than a first preset temperature difference;
the third detection module is used for detecting the opening degree of the electronic expansion valve after the first preset time of starting operation and is also used for detecting the exhaust temperature of the compressor and the opening degree of the electronic expansion valve after the second preset time of starting operation;
the third judgment module is used for judging whether the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is smaller than a second preset temperature difference or not;
the third control module is used for stopping loosening fault detection when the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is not less than the second preset temperature difference;
the third control module is also used for starting a fourth judgment module when the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is less than the second preset temperature difference;
the fourth judging module is used for judging whether the absolute value of the difference value between the opening degree of the electronic expansion valve after the second preset time period of starting operation and the opening degree of the electronic expansion valve after the first preset time period of starting operation is greater than the preset opening degree difference or not;
the fourth control module is used for stopping loosening fault detection when the absolute value of the difference value between the opening degree of the electronic expansion valve after the second preset time period of starting operation and the opening degree of the electronic expansion valve after the first preset time period of starting operation is not more than the preset opening degree difference;
the fourth control module is further used for judging that the release fault of the exhaust temperature sensor is caused when the absolute value of the difference value between the exhaust temperature of the compressor detected after the second preset time period of starting operation and the exhaust temperature of the compressor detected after the first preset time period of starting operation is greater than the second preset temperature difference.
5. The exhaust temperature sensor release failure detection device according to claim 4, characterized by further comprising:
and the fault processing module is used for locking the opening degree of the electronic expansion valve to a preset opening degree and locking the frequency of the compressor to a second preset frequency after judging that the exhaust temperature sensor has a loosening fault.
6. The exhaust temperature sensor release failure detection device according to claim 4, characterized by further comprising:
and the fault processing module is used for outputting a loosening fault code and/or sending an alarm prompt after judging the loosening fault of the exhaust temperature sensor.
7. An air conditioner comprising a compressor, a condenser, an electronic expansion valve and an evaporator connected by a pipeline, an exhaust temperature sensor being provided at an exhaust port of the compressor, characterized by further comprising an exhaust temperature sensor release failure detecting device according to any one of claims 4 to 6.
8. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor,
the processor, when executing the computer program, carries out the steps of the exhaust gas temperature sensor release failure detection method according to any one of claims 1 to 3.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the exhaust gas temperature sensor release failure detection method according to any one of claims 1 to 3.
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| CN109140688B (en) * | 2018-08-31 | 2021-07-16 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and storage medium |
| CN109654662B (en) * | 2018-11-01 | 2020-05-01 | 珠海格力电器股份有限公司 | Detection element control method and device and air conditioning unit |
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