CN103940052A - Air conditioner and fault detecting method thereof - Google Patents
Air conditioner and fault detecting method thereof Download PDFInfo
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- CN103940052A CN103940052A CN201310022660.5A CN201310022660A CN103940052A CN 103940052 A CN103940052 A CN 103940052A CN 201310022660 A CN201310022660 A CN 201310022660A CN 103940052 A CN103940052 A CN 103940052A
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Abstract
The invention discloses an air conditioner which comprises an indoor unit, an outdoor unit, a first temperature sensor, a power detecting module and a controller. The first temperature sensor is arranged on an evaporator coil of the indoor unit and is used for detecting the coil temperature of an evaporator. The power detecting module is arranged on the outdoor unit and is used for detecting the power of a compressor. The controller is electrically connected with the first temperature sensor and the power detecting module, and is used for controlling the compressor to carry out stop protection and giving an alarm when the air conditioner is in a preheating mode, the absolute value of the coil temperature difference between the coil temperature, detected by the first temperature sensor, of the evaporator in preset time and the coil temperature at the starting moment is within a preset different value range and when the compressor actual power detected by the power detecting module is smaller than or equal to the sum of a design parameter value of compressor preset power and a power correcting parameter value. The invention further relates to a fault detecting method. According to the air conditioner and the fault detecting method thereof, fault (such as fluorine shortage) detection is carried out automatically, abnormal questions can be fed back fast, and detecting efficiency is improved.
Description
Technical field
The present invention relates to refrigerating field, relate in particular to a kind of air-conditioner and fault detection method thereof.
Background technology
At present; under heating condition; common frequency-changeable compressor passes to overload protective device by temperature sensor temperature; if exceed setting value; overload protective device action makes air-conditioning stop compressor to protect compressor, have certain time delay, be to protect by exhaust and inner and outer pipes temperature to the reliability of system; but can not feed back corresponding concrete failure problems, be not easy to after-sales service.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of air-conditioner simple in structure, reasonable in design and fault detection method thereof, it carries out fault (as lacked fluorine) detection automatically, can go out abnormal problem by rapid feedback.Improved production efficiency, the present invention realizes the technical scheme that above-mentioned purpose adopts and is:
A kind of air-conditioner, comprises indoor set and off-premises station, and described air-conditioner also comprises:
The first temperature sensor, power detection module and controller;
Wherein:
Described the first temperature sensor is arranged on the evaporator coil of described indoor set, for detection of the Guan Wen of evaporimeter;
Described power detection module is arranged on off-premises station, for detection of the actual power of compressor;
Described controller is electrically connected with described the first temperature sensor and power detection module respectively, for the absolute value △ T of Guan Wenyu when start pipe temperature difference that described evaporimeter detected when described air-conditioner in heating mode described first temperature sensor in Preset Time, in preset difference value scope, and the compressor actual power P that detects of described power detection module is less than or equal to described compressor and presets power designs parameter value P
1with power correction parameter value P
2when sum, control described compressor shutdown and protect and report to the police.
More preferably, described controller comprises first detection module and the second detection module;
Described first detection module is electrically connected with described the first temperature sensor, for receiving the Guan Wen of the described evaporimeter that described the first temperature sensor detects, and while judging the Guan Wenyu start of described evaporimeter the absolute value △ T of the pipe temperature difference whether in preset difference value scope;
Described the second detection module is electrically connected with described power detection module, for receiving the actual power of the described compressor that described power detection module detects, and judge whether the actual power P of described compressor is less than or equal to the default power designs parameter value P of described compressor
1with power correction parameter value P
2sum.
More preferably, described power detection module is also for detection of the frequency f of described compressor;
Described power correction parameter value P
2for the product of frequency f and the coefficient k of described compressor.
More preferably, described air-conditioner also comprises the second temperature sensor, three-temperature sensor and the 4th temperature sensor;
Described the second temperature sensor is arranged on the air inlet place of described indoor set, for detection of indoor environment temperature;
Described three-temperature sensor is arranged on described off-premises station, for detection of outdoor environment temperature;
Described the 4th temperature sensor is arranged on the compressor air-discharging end of described off-premises station, for detection of the delivery temperature of compressor;
Described controller is electrically connected to described the second temperature sensor, three-temperature sensor and the 4th temperature sensor, be used for receiving described the second temperature sensor, the sensing temperature that three-temperature sensor and the 4th temperature sensor detect, and the start-stop of the sensing temperature control compressor detecting according to described the second temperature sensor, the sensing temperature detecting according to described three-temperature sensor regulates compressor frequency, the sensing temperature (delivery temperature of compressor) detecting according to the 4th temperature sensor is set described preset difference value scope with the difference of outdoor environment temperature.
More preferably, described air-conditioner also comprises display module, and described display module is electrically connected with described controller, for show failure code in the time reporting to the police.
The fault detection method that also relates to a kind of air-conditioner, comprises the following steps:
Step S100: select heating mode to start air-conditioner;
Step S200: the first temperature sensor of described air-conditioner detects the Guan Wen of described air conditioner room unit;
Step S300: the power detection module of described air-conditioner detects actual power P and the frequency f of compressor;
Step S400: described in when controller judges the Guan Wenyu start of the described air conditioner room unit that described the first temperature sensor detects in Preset Time, whether the absolute value △ T of the pipe temperature approach of air conditioner room unit is in preset difference value scope, if, controller enters fault judgment model, otherwise air-conditioner normally moves;
Described fault judgment model is: controller judges whether the compressor actual power P that described power detection module detects is less than or equal to the default power designs parameter value P of described compressor
1with power correction parameter value P
2sum, if so, controls described compressor shutdown and protects and report to the police; If not, exit fault judgment model.
More preferably, after described step S200, also comprise the steps:
Step S210: the second temperature sensor of described air-conditioner detects indoor environment temperature;
Step S220: the three-temperature sensor of described air-conditioner detects outdoor environment temperature;
Step S230: the 4th temperature sensor of described air-conditioner detects the delivery temperature of compressor;
Step S240: controller judges that the difference of described delivery temperature and outdoor environment temperature, whether at the first setting range, if so, enters step S250, otherwise, step S200 returned to;
Step S250: controller judges that whether the difference of indoor environment temperature described in the Guan Wenyu of described indoor set is at the second setting range, if enter step S300; Otherwise, return to step S200.
More preferably, in described step S400, controller judges whether the compressor actual power P that described power detection module detects is less than or equal to the default power designs parameter value P of described compressor
1with power correction parameter value P
2when sum, also comprise the steps:
S401: judge described compressor actual power P≤P
1+ P
2lasting duration whether reach setting duration, if so, compressor shutdown is protected and reports to the police described in controller control; If not, exit described fault judgment model.
More preferably, described step S401, in described setting duration, also comprises the steps:
S4011: improve compressor operating frequency in described setting duration, make the running frequency of described compressor in described setting duration be greater than all the time the running frequency of described compressor before described setting duration.
More preferably, P
2for the compressor horsepower corrected parameter value under different frequency f, P
2=kf.
More preferably, described controller is set described preset difference value according to the difference of the delivery temperature of described compressor and outdoor environment temperature.
More preferably, described the second setting range is 0 DEG C～5 DEG C;
In the time that described compressor starts for the first time, described the first setting range is 0 DEG C～5 DEG C;
In the time of described compressor formula at intermittence startup, described the first setting range is 5 DEG C～120 DEG C.
More preferably, described preset difference value scope is 0 DEG C～5 DEG C; Described Preset Time is 3～10 minutes.
More preferably, when described air-conditioner shutdown, also comprise the steps:
Described controller is removed and is reported to the police.
More preferably, described setting duration is 3～10 minutes.
The invention has the beneficial effects as follows:
Air-conditioner of the present invention and fault detection method thereof, automatically carry out fault (as lacked fluorine) and detect, and can go out abnormal problem by rapid feedback.Improve production efficiency, reduced cost, ensured the smooth operation of air-conditioner and improve after-sales service efficiency.
Brief description of the drawings
Fig. 1 is the schematic diagram of air-conditioner one embodiment of the present invention;
Fig. 2 is the fault detect schematic flow sheet of air-conditioner shown in Fig. 1 under heating mode.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, air-conditioner of the present invention and fault detection method thereof are further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
See figures.1.and.2, air-conditioner one embodiment of the present invention comprises indoor set 1 and off-premises station 2:
The first temperature sensor 11 and controller 12 are arranged on indoor set 1; Wherein, the first temperature sensor 11 is arranged on the evaporator coil of indoor set 1, for detection of the Guan Wen (Guan Wen of indoor set) of evaporimeter; Power detection module 23 arranges on off-premises station 2, for detection of the actual power P of the compressor of off-premises station 2;
Controller 13 is electrically connected with the first temperature sensor 11 and power detection module 23, for the absolute value △ T of Guan Wenyu when start pipe temperature difference that described evaporimeter detected when air-conditioner in heating mode first temperature sensor 11 in Preset Time, in preset difference value scope, and the compressor actual power P that detects of power detection module 23 is less than or equal to compressor and presets power designs parameter value P
1with power correction parameter value P
2when sum, control compressor shutdown and protect and report to the police.
Controller 13 comprises first detection module and the second detection module; First detection module is electrically connected with the first temperature sensor 11, for the absolute value △ T of Guan Wenyu when start pipe temperature difference that judges evaporimeter whether in preset difference value scope; The second detection module is electrically connected with power detection module 23, for judging whether the actual power P of compressor is less than or equal to the default power designs parameter value P of compressor
1with power correction parameter value P
2sum.
Controller 13 is by micro-control unit (Micro Control Unit, MCU), claims again one chip microcomputer (Single Chip Microcomputer) or the control of single-chip microcomputer integrated circuit.
Power detection module 23 is also for detection of the frequency f of compressor; Power correction parameter value P
2for the product of frequency f and the coefficient k of compressor, i.e. P
2=kf, frequency f is 30～150Hz, preferred, k is 1.1.
More preferably, as a kind of embodiment, air-conditioner also comprises the second temperature sensor 12, three-temperature sensor 21 and the 4th temperature sensor 22;
Wherein, the second temperature sensor 12 is arranged on the air inlet place of indoor set 1, for detection of indoor environment temperature; Three-temperature sensor 21 is arranged on off-premises station 2, for detection of outdoor environment temperature; The 4th temperature sensor 22 is arranged on the compressor air-discharging end of off-premises station 2, for detection of the delivery temperature of compressor;
Controller 13 is electrically connected to the second temperature sensor 12, three-temperature sensor 21 and the 4th temperature sensor 22, be used for receiving the second temperature sensor 12, the sensing temperature that three-temperature sensor 21 and the 4th temperature sensor 22 detect, the sensing temperature that controller 13 first detects according to the second temperature sensor 12 is controlled the start-stop (start and shutdown) of compressor, the sensing temperature detecting according to three-temperature sensor 21 in the time that compressor is started shooting regulates compressor frequency f, the sensing temperature detecting according to the 4th temperature sensor 22 again and the difference of outdoor environment temperature are set described preset difference value scope.Controller 13 is carried out after corresponding actions according to the sensing temperature data of above each sensor, can again collect the sensing temperature data of the first temperature sensor 11, the second temperature sensor 12 and calculate, and then judge whether detect △ T meets the demands.
More preferably, as a kind of embodiment, air-conditioner also comprises display module, and display module is also connected with institute controller electricity 13, and display module shows failure code in the time of warning.
Air-conditioner is in the time of work, and the process of detection failure comprises the following steps:
Step S100: select heating mode to start air-conditioner;
Step S200: the first temperature sensor 11 of air-conditioner detects the Guan Wen of air conditioner room unit;
Step S300: the power detection module 23 of air-conditioner detects actual power P and the frequency f of compressor;
Step S400: when controller 13 judges the Guan Wenyu start of the air conditioner room unit 1 that the first temperature sensor 11 detects in Preset Time, whether the absolute value △ T of the pipe temperature approach of air conditioner room unit 1 is in preset difference value scope, if, controller 13 enters fault judgment model, otherwise air-conditioner normally moves; Preferably, described preset difference value scope is 0 DEG C～5 DEG C, and described Preset Time is 3～10 minutes.
Described fault judgment model is: controller 13 judges whether the compressor actual power P that power detection module 23 detects is less than or equal to the default power designs parameter value P of compressor
1with power correction parameter value P
2sum, if so, controls compressor shutdown and protects and report to the police; If not, exit fault judgment model.
More preferably, as a kind of embodiment, after described step S200, also comprise the steps:
Step S210: the second temperature sensor 12 of air-conditioner detects indoor environment temperature;
Step S220: the three-temperature sensor 21 of air-conditioner detects outdoor environment temperature;
Step S230: the 4th temperature sensor 22 of air-conditioner detects the delivery temperature of compressor;
Step S240: controller 13 judges that the difference of delivery temperature and outdoor environment temperature, whether at the first setting range, if so, enters step S250, otherwise, step S200 returned to;
Step S250: controller 13 judges that whether the difference of Guan Wenyu indoor environment temperature of air conditioner room unit 1 is at the second setting range, if enter step S300; Otherwise, return to step S200.
Wherein, the second setting range is 0 DEG C～5 DEG C; In the time that compressor starts for the first time, the first setting range is 0 DEG C～5 DEG C; In the time of the startup of compressor formula at intermittence, the first setting range is 5 DEG C～120 DEG C; Controller 13 is set described preset difference value according to the difference of the delivery temperature of compressor and outdoor environment temperature.
More preferably, as a kind of embodiment, in step S400, controller 13 judges whether the compressor actual power P that power detection module 23 detects is less than or equal to the default power designs parameter value P of described compressor
1with power correction parameter value P
2when sum, also comprise the steps:
S401: judge compressor actual power P≤P
1+ P
2lasting duration whether reach setting duration, if so, controller 13 is controlled compressor shutdown and is protected and report to the police; If not, exit described fault judgment model; Preferably, set duration M
3it is 3～10 minutes.
Preferably, step S401, in described setting duration, also comprises the steps:
S4011: improve compressor operating frequency in described setting duration, make the running frequency of described compressor in described setting duration be greater than all the time the running frequency of described compressor before described setting duration.
More preferably, as another kind of embodiment, when air-conditioner shutdown, also comprise the steps:
Controller 13 is removed and is reported to the police, and in the time starting shooting next time, repeats said process detection failure again.
Various stifled situations in refrigeration system, lack refrigerant and compressor reverse rotation all can react in indoor coil pipe, therefore designer can be various stifled situations in system, lack refrigerant and compressor reverse rotation and be classified as and lack fluorine fault one class, if when secondary refrigerant leakage amount reaches 70% left and right, or refrigeration system is stifled, and (ice is stifled, dirty stifled, failsafe valve), indoor set will feed back the fluorine failure code of falling vacant in time, and user and maintenance personal can and get rid of abnormal according to this failure code fast finding.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (15)
1. an air-conditioner, comprises indoor set and off-premises station, it is characterized in that, described air-conditioner also comprises:
The first temperature sensor, power detection module and controller;
Wherein:
Described the first temperature sensor is arranged on the evaporator coil of described indoor set, for detection of the Guan Wen of evaporimeter;
Described power detection module is arranged on off-premises station, for detection of the actual power P of compressor;
Described controller is electrically connected with described the first temperature sensor and power detection module respectively, for the absolute value △ T of Guan Wenyu when start pipe temperature difference that described evaporimeter detected when described air-conditioner in heating mode described first temperature sensor in Preset Time, in preset difference value scope, and the compressor actual power P that detects of described power detection module is less than or equal to described compressor and presets power designs parameter value P
1with power correction parameter value P
2when sum, control described compressor shutdown and protect and report to the police.
2. air-conditioner according to claim 1, is characterized in that:
Described controller comprises first detection module and the second detection module;
Described first detection module is electrically connected with described the first temperature sensor, for receiving the Guan Wen of the described evaporimeter that described the first temperature sensor detects, and while judging the Guan Wenyu start of described evaporimeter the absolute value △ T of the pipe temperature difference whether in preset difference value scope;
Described the second detection module is electrically connected with described power detection module, for receiving the actual power P of the described compressor that described power detection module detects, and judge whether the actual power P of described compressor is less than or equal to the default power designs parameter value P of described compressor
1with power correction parameter value P
2sum.
3. air-conditioner according to claim 1 and 2, is characterized in that:
Described power detection module is also for detection of the frequency f of described compressor;
Described power correction parameter value P
2for the product of frequency f and the coefficient k of described compressor.
4. air-conditioner according to claim 1 and 2, is characterized in that:
Also comprise the second temperature sensor, three-temperature sensor and the 4th temperature sensor;
Described the second temperature sensor is arranged on the air inlet place of described indoor set, for detection of indoor environment temperature;
Described three-temperature sensor is arranged on described off-premises station, for detection of outdoor environment temperature;
Described the 4th temperature sensor is arranged on the compressor air-discharging end of described off-premises station, for detection of the delivery temperature of compressor;
Described controller is electrically connected to described the second temperature sensor, three-temperature sensor and the 4th temperature sensor, for receiving the sensing temperature that described the second temperature sensor, three-temperature sensor and the 4th temperature sensor detect, and the start-stop of the sensing temperature control compressor detecting according to described the second temperature sensor, the sensing temperature detecting according to described three-temperature sensor regulates compressor frequency, and the sensing temperature detecting according to described the 4th temperature sensor and the difference of outdoor environment temperature are set described preset difference value scope.
5. air-conditioner according to claim 1 and 2, is characterized in that:
Also comprise display module, described display module is electrically connected with described controller, for show failure code in the time reporting to the police.
6. a fault detection method for air-conditioner, is characterized in that, comprises the following steps:
Step S100: select heating mode to start air-conditioner;
Step S200: the first temperature sensor of described air-conditioner detects the Guan Wen of described air conditioner room unit;
Step S300: the power detection module of described air-conditioner detects actual power P and the frequency f of compressor;
Step S400: described in when controller judges the Guan Wenyu start of the described air conditioner room unit that described the first temperature sensor detects in Preset Time, whether the absolute value △ T of the pipe temperature approach of air conditioner room unit is in preset difference value scope, if, controller enters fault judgment model, otherwise air-conditioner normally moves;
Described fault judgment model is: controller judges whether the compressor actual power P that described power detection module detects is less than or equal to the default power designs parameter value P of described compressor
1with power correction parameter value P
2sum, if so, controls described compressor shutdown and protects and report to the police; If not, exit fault judgment model.
7. the fault detection method of air-conditioner according to claim 6, is characterized in that:
After described step S200, also comprise the steps:
Step S210: the second temperature sensor of described air-conditioner detects indoor environment temperature;
Step S220: the three-temperature sensor of described air-conditioner detects outdoor environment temperature;
Step S230: the 4th temperature sensor of described air-conditioner detects the delivery temperature of compressor;
Step S240: controller judges that the difference of described delivery temperature and outdoor environment temperature, whether at the first setting range, if so, enters step S250, otherwise, step S200 returned to;
Step S250: controller judges that whether the difference of indoor environment temperature described in the Guan Wenyu of described indoor set is at the second setting range, if enter step S300; Otherwise, return to step S200.
8. the fault detection method of air-conditioner according to claim 6, is characterized in that:
In described step S400, controller judges whether the compressor actual power P that described power detection module detects is less than or equal to the default power designs parameter value P of described compressor
1with power correction parameter value P
2when sum, also comprise the steps:
S401: judge described compressor actual power P≤P
1+ P
2lasting duration whether reach setting duration, if so, compressor shutdown is protected and reports to the police described in controller control; If not, exit described fault judgment model.
9. the fault detection method of air-conditioner according to claim 8, is characterized in that:
Described step S401, in described setting duration, also comprises the steps:
S4011: improve compressor operating frequency in described setting duration, make the running frequency of described compressor in described setting duration be greater than all the time the running frequency of described compressor before described setting duration.
10. the fault detection method of air-conditioner according to claim 6, is characterized in that:
P
2for the compressor horsepower corrected parameter value under different frequency f, P
2=kf.
The fault detection method of 11. air-conditioners according to claim 7, is characterized in that:
Described controller is set described preset difference value according to the difference of the delivery temperature of described compressor and outdoor environment temperature.
The fault detection method of 12. air-conditioners according to claim 7, is characterized in that:
Described the second setting range is 0 DEG C～5 DEG C;
In the time that described compressor starts for the first time, described the first setting range is 0 DEG C～5 DEG C;
In the time of described compressor formula at intermittence startup, described the first setting range is 5 DEG C～120 DEG C.
13. according to the fault detection method of the air-conditioner described in any one in claim 6 to 12, it is characterized in that:
Described preset difference value scope is 0 DEG C～5 DEG C;
Described Preset Time is 3～10 minutes.
14. according to the fault detection method of the air-conditioner described in any one in claim 6 to 12, it is characterized in that:
When described air-conditioner shutdown, also comprise the steps:
Described controller is removed and is reported to the police.
The fault detection method of 15. air-conditioners according to claim 8 or claim 9, its feature exists:
Described setting duration is 3～10 minutes.
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