CN113432244A - Exhaust sensor falling detection method and device and air conditioner - Google Patents
Exhaust sensor falling detection method and device and air conditioner Download PDFInfo
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- CN113432244A CN113432244A CN202110765660.9A CN202110765660A CN113432244A CN 113432244 A CN113432244 A CN 113432244A CN 202110765660 A CN202110765660 A CN 202110765660A CN 113432244 A CN113432244 A CN 113432244A
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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
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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
- F24F11/62—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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Abstract
The invention provides an exhaust sensor falling detection method and device and an air conditioner, and relates to the technical field of air conditioners. The exhaust gas sensor drop detection method includes: before a compressor of an air conditioner is started, acquiring the initial return air temperature of the compressor; after the compressor is started, acquiring the real-time exhaust temperature and the real-time return air temperature of the compressor; and judging whether the exhaust sensor falls off or not according to the initial return air temperature, the real-time exhaust temperature and the real-time return air temperature. The exhaust gas sensor falling detection method provided by the invention can detect the falling condition of the exhaust gas temperature sensor in time so as to respond in time and improve the system reliability of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an exhaust sensor falling detection method and device and an air conditioner.
Background
The exhaust sensor arranged in the air conditioner is mainly applied to protection of exhaust temperature and adjustment of an expansion valve, the exhaust sensor is generally fixed on an exhaust pipe, the exhaust sensor can fall off due to vibration of a compressor or other abnormal factors, and the exhaust sensor is difficult to find in time after falling off.
The temperature detection of the exhaust sensor is lower after the exhaust sensor falls off, if the air conditioner continues to operate, the opening degree of the expansion valve is smaller, the actual exhaust temperature is increased, the system pressure is increased, the exhaust temperature cannot be normally protected, and the reliability of the system is reduced.
Disclosure of Invention
The invention solves the problem that the falling condition of the exhaust temperature sensor in the prior art is difficult to be found in time.
In order to solve the above problems, the present invention provides a method for detecting the falling of an exhaust gas sensor, which can detect the falling of an exhaust gas temperature sensor in time, so as to respond in time and improve the system reliability of an air conditioner.
The embodiment of the invention provides an exhaust sensor falling detection method, which is applied to an air conditioner and comprises the following steps:
before a compressor of the air conditioner is started, acquiring the initial return air temperature of the compressor;
after the compressor is started, acquiring the real-time exhaust temperature and the real-time return air temperature of the compressor;
and judging whether the exhaust sensor falls off or not according to the initial return air temperature, the real-time exhaust temperature and the real-time return air temperature.
In an optional embodiment, the step of determining whether the exhaust sensor falls off according to the initial return air temperature, the real-time exhaust temperature, and the real-time return air temperature includes:
comparing the real-time return air temperature with a first preset threshold value;
if the real-time return air temperature is larger than the first preset threshold value, calculating a value obtained by subtracting the real-time return air temperature from the initial return air temperature to obtain a return air temperature difference value;
comparing the return air temperature difference with a second preset threshold;
and if the return air temperature difference is larger than the second preset threshold, judging whether the exhaust sensor falls off according to the real-time exhaust temperature and the real-time return air temperature.
In an optional embodiment, if the difference between the return air temperatures is greater than the second preset threshold, the step of determining whether the exhaust sensor falls off according to the real-time exhaust temperature and the real-time return air temperature includes:
if the return air temperature difference is larger than the second preset threshold, calculating a value obtained by subtracting the real-time return air temperature from the real-time exhaust air temperature to obtain a judgment difference;
comparing the judgment difference value with a third preset threshold value;
if the judgment difference value is smaller than or equal to the third preset threshold value, judging that the exhaust gas sensor falls off;
and if the judgment difference value is larger than the third preset threshold value, judging that the exhaust gas sensor does not fall off.
In an optional embodiment, after the step of determining whether the exhaust sensor falls off according to the initial return air temperature, the real-time exhaust temperature, and the real-time return air temperature, the method further includes:
if the exhaust sensor is judged to fall off, controlling an expansion valve of the air conditioner to adjust to a preset opening degree;
controlling the current running frequency of the compressor to be adjusted to a preset frequency;
and sending out an alarm signal.
In an alternative embodiment, before the step of adjusting the current operating frequency of the compressor to the preset frequency, the method further includes:
and calculating the value of the current operation frequency of the compressor multiplied by a preset proportionality coefficient to obtain the preset frequency, wherein the preset proportionality coefficient is less than 1.
The invention also provides an exhaust sensor falling detection device, which is applied to an air conditioner and comprises:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the initial return air temperature of a compressor of the air conditioner before the compressor is started and acquiring the real-time exhaust temperature and the real-time return air temperature of the compressor after the compressor is started;
and the judging module is used for judging whether the exhaust sensor falls off or not according to the initial return air temperature, the real-time exhaust temperature and the real-time return air temperature.
In an optional embodiment, the determining module includes:
the first comparison sub-module is used for comparing the real-time return air temperature with a first preset threshold value;
the first calculation submodule is used for calculating a value obtained by subtracting the real-time return air temperature from the initial return air temperature to obtain a return air temperature difference value under the condition that the real-time return air temperature is greater than the first preset threshold value;
the second comparison submodule is used for comparing the return air temperature difference with a second preset threshold value;
and the judgment submodule is used for judging whether the exhaust sensor falls off or not according to the real-time exhaust temperature and the real-time return air temperature under the condition that the return air temperature difference is greater than the second preset threshold value.
In an optional embodiment, the determining sub-module includes:
the second calculation submodule is used for calculating a value obtained by subtracting the real-time return air temperature from the real-time exhaust air temperature under the condition that the return air temperature difference is larger than the second preset threshold value, so as to obtain a judgment difference value;
the third comparison submodule is used for comparing the judgment difference value with a third preset threshold value;
a first judgment submodule configured to judge that the exhaust gas sensor falls off when the judgment difference is smaller than or equal to the third preset threshold;
and a second determination submodule configured to determine that the exhaust gas sensor is not detached, when the determination difference is larger than the third preset threshold.
In an alternative embodiment, the exhaust gas sensor drop-out detecting device further includes:
the adjusting module is used for adjusting an expansion valve of the air conditioner to a preset opening degree and adjusting the current running frequency of the compressor to a preset frequency under the condition that the exhaust sensor is judged to fall off;
and the alarm module is used for sending out an alarm signal under the condition that the exhaust sensor is judged to fall off.
An embodiment of the present invention further provides an air conditioner including a controller configured to execute the exhaust gas sensor drop detection method, including: before a compressor of the air conditioner is started, acquiring the initial return air temperature of the compressor; after the compressor is started, acquiring the real-time exhaust temperature and the real-time return air temperature of the compressor; and judging whether the exhaust sensor falls off or not according to the initial return air temperature, the real-time exhaust temperature and the real-time return air temperature.
Drawings
FIG. 1 is a block flow diagram of a method for detecting a drop-out of an exhaust gas sensor according to an embodiment of the present invention;
FIG. 2 is a block diagram of a sub-step of step S103 in FIG. 1;
FIG. 3 is a block flow diagram of a sub-step of sub-step S1034 in FIG. 2;
FIG. 4 is a block diagram of an exhaust gas sensor detachment detection apparatus according to an embodiment of the present invention;
FIG. 5 is a block diagram of a structure of the determining module shown in FIG. 4;
fig. 6 is a block diagram of a structure of the judgment submodule in fig. 5.
Description of reference numerals:
100-exhaust sensor drop-out detection means; 110-an obtaining module; 130-a judgment module; 131-a first comparison sub-module; 133-a first calculation submodule; 135-a second alignment submodule; 137-judgment submodule; 1371-a second calculation submodule; 1373-a third alignment submodule; 1375-a first judgment sub-module; 1377-a second decision submodule; 150-a conditioning module; 170-alarm module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, fig. 1 is a block flow diagram illustrating a method for detecting a drop-out of an exhaust gas sensor according to the present embodiment. The exhaust gas sensor falling detection method is applied to the air conditioner, and can detect the falling condition of the exhaust gas temperature sensor in time so that the air conditioner can respond in time and the system reliability of the air conditioner is improved. The exhaust gas sensor falling detection method comprises the following steps:
and step S101, before a compressor of the air conditioner is started, acquiring the initial return air temperature of the compressor.
In this embodiment, the return air temperature of the compressor is detected in real time by the temperature detection device provided at the return air port of the compressor. Before the compressor is started, the detection data of the temperature detection device is received, and the initial return air temperature is obtained.
Further, the exhaust gas sensor drop-out detection method may further include:
and S102, acquiring the real-time exhaust temperature and the real-time return air temperature of the compressor after the compressor is started.
In fact, in this embodiment, the exhaust temperature of the compressor is detected in real time by the exhaust sensor disposed on the exhaust pipe of the compressor, and the exhaust sensor is the object to be detected for the falling-off condition in this embodiment. And after the compressor is started, receiving the detection data of the exhaust sensor in real time to obtain the real-time exhaust temperature. And after the compressor is started, real-time detection data of the temperature detection device arranged on the air return port is received in real time, and the real-time return air temperature is obtained.
Further, the exhaust gas sensor drop-out detection method may further include:
and step S103, judging whether the exhaust sensor falls off or not according to the initial return air temperature, the real-time exhaust temperature and the real-time return air temperature.
Whether the exhaust sensor falls off or not is identified through the change of the return air temperature and the real-time exhaust temperature.
Referring to fig. 2, fig. 2 is a block diagram illustrating a sub-step flow of step S103. Step S103 may comprise the following sub-steps:
and a substep S1031, comparing the real-time return air temperature with a first preset threshold value.
In view of the fact that the temperature of the return port of the compressor is maintained substantially below 20 c during normal operation of the air conditioner, in this embodiment, the first preset threshold value is 20 c.
And in the substep S1032, if the real-time return air temperature is greater than a first preset threshold value, calculating a value obtained by subtracting the real-time return air temperature from the initial return air temperature to obtain a return air temperature difference value.
If the real-time return air temperature is greater than the first preset threshold value by 20 ℃, the return air of the compressor is normal. In this case, whether the air conditioner is in a normal operation state is judged again by calculating the difference value of the return air temperature, so that the influence of other faults of the air conditioner on the judgment result is eliminated. Therefore, in the sub-step S1032, the difference between the initial return air temperature and the real-time return air temperature is calculated to obtain the return air temperature difference.
And a substep S1033 of comparing the return air temperature difference with a second preset threshold.
And after calculating to obtain the return air temperature difference, comparing the return air temperature difference with a second preset threshold, and judging whether the air conditioner normally operates according to the comparison result. In consideration of the fact that the return air pipe temperature of the air conditioner is kept substantially above the difference of 10 ℃ in the normal operation state before and after the air conditioner is started, in the present embodiment, the second preset threshold value is 10 ℃.
And in the substep S1034, if the return air temperature difference is greater than a second preset threshold, judging whether the exhaust sensor falls off according to the real-time exhaust temperature and the real-time return air temperature.
If the return air temperature difference is greater than the second preset threshold value by 10 ℃, the normal operation of the air conditioner is indicated, and other faults do not occur. In this case, whether the exhaust sensor is detached is determined based on the difference between the real-time exhaust temperature and the real-time return air temperature.
Referring to fig. 3, fig. 3 is a block diagram illustrating a sub-step flow of sub-step S1034. Substep S1034 may include the following substeps
In the substep S1034a, if the return air temperature difference is greater than the second preset threshold, the value obtained by subtracting the real-time return air temperature from the real-time exhaust air temperature is calculated to obtain a determination difference.
And if the return air temperature difference is greater than the second preset threshold value by 10 ℃, calculating the difference of the real-time exhaust temperature minus the real-time return air temperature to obtain a judgment difference.
In the sub-step S1034b, the determination difference is compared with a third preset threshold.
It is considered that the temperature detected by the exhaust gas sensor is approximately equal to the temperature detected by the temperature detection device provided at the return port in the case where the exhaust gas sensor is detached. Therefore, the third preset threshold is set in a range of 0 ℃ to 3 ℃, and in this embodiment, 1.5 ℃ is preferred.
In sub-step S1034c, if it is determined that the difference is less than or equal to the third preset threshold, it is determined that the exhaust gas sensor is detached.
And if the difference is judged to be less than or equal to the third preset threshold value of 1.5 ℃, the difference between the real-time exhaust temperature and the real-time return air temperature is less than 1.5 ℃, and the exhaust sensor is represented to fall off.
In the sub-step S1034d, if the difference is greater than the third preset threshold, it is determined that the exhaust gas sensor is not detached.
On the contrary, if the difference is judged to be larger than the third preset threshold value by 1.5 ℃, the difference between the real-time exhaust temperature and the real-time return air temperature is larger than 1.5 ℃, and the exhaust sensor is represented not to fall off. It should be noted that, for the value of the third preset threshold, adjustment may be performed according to the actual application environment and application conditions, so as to improve the accuracy of the determination result.
With continued reference to fig. 1, the method for detecting exhaust gas sensor drop may further include:
and step S104, if the exhaust sensor is judged to fall off, controlling an expansion valve of the air conditioner to adjust to a preset opening degree.
Under the condition that the sensor drops, if the air conditioner keeps running continuously in the current state, the expansion valve is adjusted according to the detection result of the exhaust sensor, so that the opening degree of the expansion valve is reduced, the actual exhaust temperature is increased, the system pressure is increased, the exhaust temperature cannot be normally protected, the effect of the air conditioner is seriously influenced, and extremely poor experience is brought to a user.
Therefore, in the case where it is determined that the drop-off of the sensor occurs, that is, when it is determined that the difference is less than or equal to the third preset threshold value of 1.5 ℃, the expansion valve of the air conditioner is forcibly controlled to be adjusted to the preset opening degree, preventing the expansion valve from being adjusted to be excessively small. In this embodiment, the preset opening degree refers to a middle valve step of the expansion valve, and values are different according to different models. The expansion valve is forcibly adjusted to the middle valve step, so that the throttling effect is achieved, and the phenomenon that the system load is too large due to too small valve step is avoided.
And step S105, controlling the current running frequency of the compressor to be adjusted to a preset frequency.
The preset frequency is calculated by multiplying the current running frequency of the compressor by a preset proportionality coefficient, wherein the preset proportionality coefficient is smaller than 1.
And step S106, sending out an alarm signal.
And sending an alarm signal that the exhaust sensor falls off, so that the panel of the air conditioner gives an alarm or a terminal device in communication connection with the air conditioner gives an alarm to remind a user of timely maintenance.
It should be noted that step S104, step S105, and step S106 are three parallel steps after step S103, and may be executed simultaneously or slightly sequentially, and the execution order of the three steps is not limited.
Therefore, in the exhaust gas sensor falling detection method provided by the embodiment, under the condition that the normal operation of the air conditioner is judged according to the difference value between the real-time return air temperature and the return air temperature, whether the exhaust gas sensor falls is judged according to the difference value between the real-time exhaust air temperature and the real-time return air temperature. The judgment result can be obtained in time, and then the air conditioner and the user can be guaranteed to respond in time, the system reliability of the air conditioner is improved, convenience is brought to maintenance and overhaul of the air conditioner, and the user experience is obviously improved.
In order to perform the corresponding steps in the above method embodiments and various possible embodiments, an implementation of the exhaust gas sensor drop-out detection apparatus 100 is given below. Referring to fig. 4, fig. 4 is a block diagram illustrating an exhaust gas sensor falling-off detection apparatus 100 according to an embodiment of the present disclosure. The exhaust gas sensor drop detection device 100 is applied to an air conditioner, and the exhaust gas sensor drop detection device 100 includes: the device comprises an acquisition module 110, a judgment module 130, an adjustment module 150 and an alarm module 170.
The obtaining module 110 is configured to obtain an initial return air temperature of a compressor before the compressor of the air conditioner is started, and obtain a real-time exhaust temperature and a real-time return air temperature of the compressor after the compressor is started. It can be seen that the acquiring module 110 is used for executing the steps S101 and S102 of the exhaust gas sensor falling-off detecting method.
The determining module 130 is configured to determine whether the exhaust sensor falls off according to the initial return air temperature, the real-time exhaust temperature, and the real-time return air temperature. It can be seen that the determining module 130 is configured to execute the step S103 of the exhaust gas sensor falling-off detecting method.
And the adjusting module 150 is configured to adjust an expansion valve of the air conditioner to a preset opening degree and adjust the current operating frequency of the compressor to a preset frequency under the condition that it is determined that the exhaust sensor falls off. The adjusting module 150 is used for executing the steps S104 and S105 of the exhaust gas sensor falling-off detection method.
And the alarm module 170 is used for sending out an alarm signal under the condition that the exhaust sensor is judged to fall off. The alarm module 170 is used to execute the step S106 of the exhaust gas sensor drop-off detection method.
Referring to fig. 5, fig. 5 is a block diagram illustrating a structure of the determining module 130. The determining module 130 includes:
the first comparing sub-module 131 is configured to compare the real-time return air temperature with a first preset threshold. The first comparing sub-module 131 is used for executing the sub-step S1031 of the exhaust gas sensor falling detection method.
The first calculating submodule 133 is configured to calculate a value obtained by subtracting the real-time return air temperature from the initial return air temperature to obtain a return air temperature difference value when the real-time return air temperature is greater than a first preset threshold value. The first calculation submodule 133 is configured to execute the substep S1032 of the aforementioned exhaust gas sensor fall-off detection method.
The second comparison submodule 135 is configured to compare the return air temperature difference with a second preset threshold. The second comparing sub-module 135 is configured to perform the sub-step S1033 of the aforementioned exhaust gas sensor falling-off detection method.
And the judging submodule 137 is configured to judge whether the exhaust sensor falls off according to the real-time exhaust temperature and the real-time return air temperature when the return air temperature difference is greater than a second preset threshold. The determining module 130 is used for executing the substep S1034 of the exhaust gas sensor falling detection method.
Referring to fig. 6, fig. 6 is a block diagram of a structure of the determining sub-module 137. The judgment sub-module 137 includes:
and the second calculating submodule 1371 is used for calculating a value obtained by subtracting the real-time return air temperature from the real-time exhaust air temperature to obtain a judgment difference value under the condition that the return air temperature difference value is greater than a second preset threshold value. The second calculation submodule 1371 is configured to perform substep S1034a of the exhaust gas sensor drop-out detection method described above.
And the third comparison sub-module 1373 is configured to compare the determination difference with a third preset threshold. The third comparing submodule 1373 is configured to perform the substep S1034b of the exhaust gas sensor falling detection method.
And the first judgment submodule 1375 is used for judging that the exhaust gas sensor falls off under the condition that the judgment difference value is smaller than or equal to the third preset threshold value. The first determining submodule 1375 is configured to perform the substep S1034c of the exhaust gas sensor falling detection method.
And the second judging submodule 1377 is used for judging that the exhaust gas sensor does not fall off under the condition that the judgment difference value is larger than the third preset threshold value. The second determination submodule 1377 is configured to perform substep S1034d of the exhaust gas sensor drop-out detection method described above.
It can be seen that, in the exhaust gas sensor falling detection apparatus 100 provided in this embodiment, under the condition that the normal operation of the air conditioner is determined by the difference between the real-time air return temperature and the air return temperature, whether the exhaust gas sensor falls is determined by the difference between the real-time exhaust temperature and the real-time air return temperature. The judgment result can be obtained in time, and then the air conditioner and the user can be guaranteed to respond in time, the system reliability of the air conditioner is improved, convenience is brought to maintenance and overhaul of the air conditioner, and the user experience is obviously improved.
The present embodiment further provides an air conditioner, which includes a controller, wherein the controller is configured to execute steps S101 to S106 of the exhaust gas sensor falling-off detection method and corresponding sub-steps.
Therefore, the air conditioner provided by the embodiment can timely identify that the exhaust sensor falls off, and then timely respond, and the system reliability and the user experience are guaranteed.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An exhaust gas sensor falling detection method is applied to an air conditioner, and is characterized by comprising the following steps:
before a compressor of the air conditioner is started, acquiring the initial return air temperature of the compressor;
after the compressor is started, acquiring the real-time exhaust temperature and the real-time return air temperature of the compressor;
and judging whether the exhaust sensor falls off or not according to the initial return air temperature, the real-time exhaust temperature and the real-time return air temperature.
2. The exhaust gas sensor drop-off detection method according to claim 1, wherein the step of determining whether the exhaust gas sensor is dropped off based on the initial return air temperature, the real-time exhaust temperature, and the real-time return air temperature includes:
comparing the real-time return air temperature with a first preset threshold value;
if the real-time return air temperature is larger than the first preset threshold value, calculating a value obtained by subtracting the real-time return air temperature from the initial return air temperature to obtain a return air temperature difference value;
comparing the return air temperature difference with a second preset threshold;
and if the return air temperature difference is larger than the second preset threshold, judging whether the exhaust sensor falls off according to the real-time exhaust temperature and the real-time return air temperature.
3. The exhaust gas sensor drop-off detection method according to claim 2, wherein the step of determining whether the exhaust gas sensor drops off according to the real-time exhaust gas temperature and the real-time return air temperature if the return air temperature difference is greater than the second preset threshold includes:
if the return air temperature difference is larger than the second preset threshold, calculating a value obtained by subtracting the real-time return air temperature from the real-time exhaust air temperature to obtain a judgment difference;
comparing the judgment difference value with a third preset threshold value;
if the judgment difference value is smaller than or equal to the third preset threshold value, judging that the exhaust gas sensor falls off;
and if the judgment difference value is larger than the third preset threshold value, judging that the exhaust gas sensor does not fall off.
4. The exhaust gas sensor drop-out detection method according to claim 1, further comprising, after the step of determining whether the exhaust gas sensor is dropped out based on the initial return air temperature, the real-time exhaust gas temperature, and the real-time return air temperature:
if the exhaust sensor is judged to fall off, controlling an expansion valve of the air conditioner to adjust to a preset opening degree;
controlling the current running frequency of the compressor to be adjusted to a preset frequency;
and sending out an alarm signal.
5. The exhaust gas sensor drop-out detection method according to claim 4, wherein the step of controlling the current operating frequency of the compressor to be adjusted to a preset frequency comprises:
calculating the value of the current operation frequency of the compressor multiplied by a preset proportionality coefficient to obtain the preset frequency, wherein the preset proportionality coefficient is less than 1;
and adjusting the current running frequency of the compressor to the preset frequency.
6. An exhaust gas sensor drop detection device applied to an air conditioner, the exhaust gas sensor drop detection device (100) comprising:
the air conditioner comprises an acquisition module (110) used for acquiring the initial return air temperature of a compressor of the air conditioner before the compressor is started and acquiring the real-time exhaust temperature and the real-time return air temperature of the compressor after the compressor is started;
and the judging module (130) is used for judging whether the exhaust sensor falls off or not according to the initial return air temperature, the real-time exhaust temperature and the real-time return air temperature.
7. The exhaust gas sensor drop-out detection device according to claim 6, wherein the determination module (130) includes:
the first comparison sub-module (131) is used for comparing the real-time return air temperature with a first preset threshold value;
the first calculation submodule (133) is used for calculating a value obtained by subtracting the real-time return air temperature from the initial return air temperature to obtain a return air temperature difference value under the condition that the real-time return air temperature is greater than the first preset threshold value;
a second comparison submodule (135) for comparing the return air temperature difference with a second preset threshold value;
and the judgment submodule (137) is used for judging whether the exhaust sensor falls off or not according to the real-time exhaust temperature and the real-time return air temperature under the condition that the return air temperature difference value is larger than the second preset threshold value.
8. The exhaust gas sensor dropout detection apparatus according to claim 7, wherein the determination submodule (137) comprises:
the second calculation submodule (1371) is used for calculating a value obtained by subtracting the real-time return air temperature from the real-time exhaust air temperature under the condition that the return air temperature difference is larger than the second preset threshold value, so as to obtain a judgment difference value;
a third comparison submodule (1373) for comparing the determination difference with a third preset threshold;
a first determination submodule (1375) for determining that the exhaust gas sensor is out of order in a case where the determination difference is smaller than or equal to the third preset threshold value;
a second determination submodule (1377) for determining that the exhaust gas sensor is not detached, in a case where the determination difference is larger than the third preset threshold value.
9. The exhaust gas sensor drop detection device according to claim 6, wherein the exhaust gas sensor drop detection device (100) further includes:
the adjusting module (150) is used for adjusting an expansion valve of the air conditioner to a preset opening degree and adjusting the current running frequency of the compressor to a preset frequency under the condition that the exhaust sensor is judged to fall off;
and the alarm module (170) is used for sending out an alarm signal under the condition that the exhaust sensor is judged to fall off.
10. An air conditioner characterized by comprising a controller for executing the exhaust gas sensor drop-out detecting method according to any one of claims 1 to 5.
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| CN202110765660.9A CN113432244A (en) | 2021-07-07 | 2021-07-07 | Exhaust sensor falling detection method and device and air conditioner |
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| CN202110765660.9A CN113432244A (en) | 2021-07-07 | 2021-07-07 | Exhaust sensor falling detection method and device and air conditioner |
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| CN202110765660.9A Withdrawn CN113432244A (en) | 2021-07-07 | 2021-07-07 | Exhaust sensor falling detection method and device and air conditioner |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11237097A (en) * | 1998-02-20 | 1999-08-31 | Toshiba Corp | Multiroom air conditioner |
| KR20010028950A (en) * | 1999-09-28 | 2001-04-06 | 구자홍 | thermal sensor error judgement method of air-conditioner |
| CN109282422A (en) * | 2018-08-30 | 2019-01-29 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method and air conditioner |
| CN110925948A (en) * | 2019-12-12 | 2020-03-27 | 宁波奥克斯电气股份有限公司 | Detection method and system and air conditioner |
| CN110987241A (en) * | 2019-12-23 | 2020-04-10 | 珠海格力电器股份有限公司 | Fault detection method and device for outer machine temperature sensing bulb and air conditioning unit |
| CN112393377A (en) * | 2020-11-16 | 2021-02-23 | 珠海格力电器股份有限公司 | Fault judgment method and air conditioner |
-
2021
- 2021-07-07 CN CN202110765660.9A patent/CN113432244A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11237097A (en) * | 1998-02-20 | 1999-08-31 | Toshiba Corp | Multiroom air conditioner |
| KR20010028950A (en) * | 1999-09-28 | 2001-04-06 | 구자홍 | thermal sensor error judgement method of air-conditioner |
| CN109282422A (en) * | 2018-08-30 | 2019-01-29 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method and air conditioner |
| CN110925948A (en) * | 2019-12-12 | 2020-03-27 | 宁波奥克斯电气股份有限公司 | Detection method and system and air conditioner |
| CN110987241A (en) * | 2019-12-23 | 2020-04-10 | 珠海格力电器股份有限公司 | Fault detection method and device for outer machine temperature sensing bulb and air conditioning unit |
| CN112393377A (en) * | 2020-11-16 | 2021-02-23 | 珠海格力电器股份有限公司 | Fault judgment method and air conditioner |
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