CN104101051B - Air conditioner and detection control method and device for abnormal coolant circulation of air conditioner - Google Patents

Air conditioner and detection control method and device for abnormal coolant circulation of air conditioner Download PDF

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Publication number
CN104101051B
CN104101051B CN201410289590.4A CN201410289590A CN104101051B CN 104101051 B CN104101051 B CN 104101051B CN 201410289590 A CN201410289590 A CN 201410289590A CN 104101051 B CN104101051 B CN 104101051B
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air
frequency
environment temperature
refrigerant circulation
conditioner
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CN104101051A (en
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王宝彬
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Guangdong Midea Group Wuhu Air Conditioning Equipment Co Ltd
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Guangdong Midea Group Wuhu Air Conditioning Equipment Co Ltd
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Abstract

The invention belongs to the technical field of air conditioner control, and provides an air conditioner and a detection control method and device for the abnormal coolant circulation of the air conditioner. The method comprises the steps of in the operation process of the air conditioner, obtaining corresponding rated input power from a preset correlated database according to outdoor environment temperature, indoor environment temperature, operation frequency of a compressor and the opening degree of an expansion valve, judging that the coolant circulation is abnormal when the difference between the current air conditioner input power and the rated input power is larger than a power difference reference value, recording the abnormal times, and restarting the compressor to drive the coolant circulation to restore normal after the compressor is stopped for certain time if the abnormal times do not achieve the preset continuous abnormal times; if the normal times achieve the preset continuous abnormal times, showing that the coolant circulation cannot be restored normal, controlling the air conditioner to be stopped to avoid the damage of the compressor, and sending an abnormal prompt to notify a user, thus solving the problem that the air conditioner compressor is damaged due to the fact that the expansion valve of an air conditioner outdoor unit is blocked by a coolant.

Description

A kind of air-conditioner and its refrigerant circulation abnormality detection control method and device
Technical field
The invention belongs to air conditioner controlling technology field, more particularly, to a kind of air-conditioner and its refrigerant circulation abnormality detection control Method and apparatus.
Background technology
The running environment that air-conditioner is faced during daily use is complex, and under certain operating mode, air-conditioning is outdoor Coolant within machine can because of some reasons at expansion valve blockage phenomenon.For example: under heating condition, terminate in defrost And compressor is when restarting, because ambient temperature is low, system pressure big and coolant viscosity is big, coolant is in compressor start Easily block the expansion valve of air-conditioner outdoor unit, once and expansion valve blocking, then refrigerant circulation arises that exception.In refrigerant circulation In the case of exception, if compressor long-play will make compressor because internal temperature is too high frequent start-stop, thus leading Compressor is caused to be damaged.
Content of the invention
It is an object of the invention to provide a kind of refrigerant circulation abnormality detection control method of air-conditioner is it is intended to solve because cold Matchmaker blocks the expansion valve of air-conditioner outdoor unit and leads to the impaired problem of compressor of air conditioner.
The present invention is achieved in that a kind of refrigerant circulation abnormality detection control method of air-conditioner, and it includes following step Rapid:
A. outdoor environment temperature, indoor environment temperature, compressor operating frequency, expansion are obtained in air-conditioner running Valve opening and air-conditioning input power;
B. according to described outdoor environment temperature, described indoor environment temperature, described compressor operating frequency and described expansion Valve opening, obtains corresponding rated input power from default linked database;
C. judge whether described air-conditioning input power and the difference of described rated input power are more than difference power reference value, be, Then execution step d, no, then return and execute described step a;
D. judge that refrigerant circulation is abnormal, recording exceptional number of times;
E. judge whether described frequency of abnormity reaches default continuous abnormal number of times, be, then execution step f, no, then execute step Rapid g;
F. air-conditioner is controlled to shut down and send abnormal prompt;
G. control compressor to quit work in Preset Time, then control compressor to restart, and it is described to return execution Step a.
Another object of the present invention also resides in the refrigerant circulation abnormality detection control device providing a kind of air-conditioner, its bag Include:
Operational factor acquisition module, in air-conditioner running obtain outdoor environment temperature, indoor environment temperature, Compressor operating frequency, expansion valve opening and air-conditioning input power;
Data acquisition module, for according to described outdoor environment temperature, described indoor environment temperature, described compressor operating Frequency and described expansion valve opening, obtain corresponding rated input power from default linked database;
Power judge module, for judging whether described air-conditioning input power and the difference of described rated input power are more than work( Rate difference reference value, judged result for no when continue drive described operational factor acquisition module be operated;
Frequency of abnormity logging modle, for when the judged result of described power judge module is for being, judging refrigerant circulation Abnormal, and recording exceptional number of times;
Frequency of abnormity judge module, for judging whether described frequency of abnormity reaches default continuous abnormal number of times;
Shut down and control and reminding module, for when the judged result of described frequency of abnormity judge module is for being, controlling empty Device is adjusted to shut down and send abnormal prompt;
Restart control module, for when the judged result of described frequency of abnormity judge module is no, controlling compressor to exist Quit work in Preset Time, then control compressor to restart, and continue to drive described operational factor acquisition module to carry out work Make.
A further object of the present invention also resides in provides a kind of air-conditioning including above-mentioned refrigerant circulation abnormality detection control device Device.
In the present invention, according to outdoor environment temperature, indoor environment temperature, compressor operating in air-conditioner running Frequency and expansion valve opening, obtain corresponding rated input power from default linked database, in current air-conditioning input work When the difference of rate and rated input power is more than difference power reference value, judge that refrigerant circulation is abnormal, and recording exceptional number of times, if different The often not up to default continuous abnormal number of times of number of times, then compressor shutdown for a period of time after, then reset itself is to order about coolant Circulation recovers normal;If frequency of abnormity reaches default continuous abnormal number of times, show that refrigerant circulation cannot recover normal, need to control Air-conditioner processed is shut down to avoid compressor impaired, and is simultaneously emitted by abnormal prompt to inform user, thus solve blocking up because of coolant Fill in the expansion valve of air-conditioner outdoor unit and lead to the impaired problem of compressor of air conditioner.
Brief description
Fig. 1 is the flowchart of the refrigerant circulation abnormality detection control method of air-conditioner provided in an embodiment of the present invention;
Fig. 2 is the structure chart of the refrigerant circulation abnormality detection control device of air-conditioner provided in an embodiment of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and It is not used in the restriction present invention.
Fig. 1 shows the realization stream of the refrigerant circulation abnormality detection control method of air-conditioner provided in an embodiment of the present invention Journey, for convenience of description, illustrate only part related to the present invention, details are as follows:
In step s1, air-conditioner running obtains outdoor environment temperature, indoor environment temperature, compressor operating Frequency, expansion valve opening and air-conditioning input power.Step s1 specifically includes following steps:
Detect and obtain outdoor environment temperature and indoor environment temperature;
Compressor operating frequency is detected;
Expansion valve is detected and is obtained expansion valve opening;
The input voltage of air-conditioner electric-controlled plate is detected;
The input current of air-conditioner electric-controlled plate is detected;
Calculated according to input voltage and input current and obtain air-conditioning input power.
In step s2, according to outdoor environment temperature, indoor environment temperature, compressor operating frequency and expansion valve opening, Corresponding rated input power is obtained from default linked database.
It should be noted that before air-conditioner dispatches from the factory, can be in default outdoor environment temperature scope, indoor environment temperature model Enclose, in the range of expansion valve opening scope and compressor operating frequency, control air-conditioner in different outdoor environment temperatures, indoor ring Realize under conditions of border temperature, expansion valve opening and compressor operating frequency normal run, and indoor fan and outdoor fan Running frequency is to be changeless all the time, works in different outdoor environment temperatures, indoor environment temperature, expansion in air-conditioner When valve opening and compressor operating frequency, the input power of corresponding air-conditioner is recorded, and by different outdoor rings Multigroup association that border temperature, indoor environment temperature, expansion valve opening and compressor operating frequency are formed with corresponding input power Data set is stored in the memorizer within air-conditioner, thus forming default linked database.Wherein, in default linked database Input power be exactly above-mentioned rated input power.
Specifically it is assumed that outdoor environment temperature scope is tmin~tmax, indoor environment temperature scope is tmin~tmax, expand Valve opening scope is kmin~kmax, compressor operating frequency scope is ωmin~ωmax, the running frequency of indoor fan is fin, room The running frequency of outer blower fan is fout, finAnd foutIt is fixed value.Before air-conditioner dispatches from the factory, can be in tmin~tmaxInterior according to temperature Adjusted value δ t adjusts outdoor environment temperature, in tmin~tmaxInterior according to temperature adjusted value δ t adjust indoor environment temperature, in kmin ~kmaxInterior according to aperture adjusted value δ k adjust expansion valve opening, in ωmin~ωmaxInterior according to frequency adjusted value δ ω set not With compressor operating frequency, control air-conditioner in above-mentioned set different outdoor environment temperature, indoor environment temperature, swollen It is operated under swollen valve opening and compressor operating frequency, and corresponding air-conditioning input power is recorded, then formed many Group outdoor environment temperature, indoor environment temperature, expansion valve opening and compressor operating frequency are associated with air-conditioning input power Data set, thus forming a data base comprising multigroup associated data group, and stores in the memorizer within to air-conditioner.
In step s3, judge whether air-conditioning input power and the difference of rated input power are more than difference power reference value, be, Then execution step s4, no, then return execution step s1.
It should be noted that when air-conditioner occur because expansion valve blocks refrigerant circulation abnormal when, its input power with just There is larger difference in input power when often running, so the embodiment of the present invention introduces above-mentioned difference power reference value, power Difference reference value is used for weighing whether air-conditioner refrigerant circulation extremely because of expansion valve blocking.
In step s4, judge that refrigerant circulation is abnormal, recording exceptional number of times.
Wherein, the recording exceptional number of times in step s4 step particularly as follows:
Carry out obtaining current frequency of abnormity from add-one operation on the basis of the upper frequency of abnormity once being recorded.
In step s5, judge whether frequency of abnormity reaches default continuous abnormal number of times, be, then execution step s6, no, then Execution step s7.
In step s6, air-conditioner is controlled to shut down and send abnormal prompt.Wherein, abnormal prompt can be auditory tone cueses, Display information prompting or sound are synchronously pointed out with display information.
In step s7, control compressor to quit work in Preset Time, then control compressor to restart, and return Execution step s1.Wherein, the span of Preset Time can be 2 minutes~5 minutes, preferably 3 minutes.
For from step s5 to step s7, it should be understood that
In step s5, default continuous abnormal number of times is for weighing the refrigerant circulation exception caused by expansion valve blocking The order of severity, it can be 2 times or 3 times.
In step s7, when frequency of abnormity not up to default continuous abnormal number of times, first control compressor in Preset Time Inside quit work, if in Preset Time, outdoor environment temperature raises and system pressure reduces, then coolant viscosity can accordingly subtract Little, the blockage of expansion valve also can have been alleviated, then, restart compressor again after Preset Time so that it may so that cold Matchmaker's circulation recovers normal, therefore, controls compressor out-of-work step in Preset Time actually to play time delay buffering Effect, be conducive to obtaining preferable refrigerant circulation condition.
In step s6, when frequency of abnormity reaches default continuous abnormal number of times, then show that expansion valve blocking is more serious, Refrigerant circulation cannot be made to recover normal by step s7, so needing to control air-conditioner to shut down and issuing the user with abnormal carrying Show, shut down contribute to protect compressor avoid impaired, abnormal prompt be conducive to remind user contact producer phase is carried out to air-conditioner The malfunction elimination answered and maintenance.
Fig. 2 shows the structure of the refrigerant circulation abnormality detection control device of air-conditioner provided in an embodiment of the present invention, is It is easy to illustrate, illustrate only part related to the present invention, details are as follows:
Refrigerant circulation abnormality detection control device includes operational factor acquisition module 100, data acquisition module 200, power Judge module 300, frequency of abnormity logging modle 400, frequency of abnormity judge module 500, shut down control with reminding module 600 and Restart control module 700.
Operational factor acquisition module 100 is used for obtaining outdoor environment temperature, indoor environment temperature in air-conditioner running Degree, compressor operating frequency, expansion valve opening and air-conditioning input power.
Data acquisition module 200 is for the outdoor environment temperature according to acquired in operational factor acquisition module 100, indoor ring Border temperature, compressor operating frequency and expansion valve opening, obtain corresponding rated input power from default linked database.
Whether power judge module 300 is used for judging the difference of air-conditioning input power and rated input power more than difference power ginseng Examine value, judged result for no when continue drive operational factor acquisition module 100 be operated.
Frequency of abnormity logging modle 400 is used for, when the judged result of power judge module 300 is to be, judging refrigerant circulation Abnormal, and recording exceptional number of times.
Frequency of abnormity judge module 500 is used for judging whether the frequency of abnormity that frequency of abnormity logging modle 400 is recorded reaches To default continuous abnormal number of times.Wherein, default continuous abnormal number of times can be 2 times or 3 times.
Shut down to control and be used for, when the judged result of frequency of abnormity judge module 500 is to be, controlling empty with reminding module 600 Device is adjusted to shut down and send abnormal prompt.
Restart control module 700, for when the judged result of frequency of abnormity judge module 500 is no, controlling compressor Quit work in Preset Time, then control compressor to restart, and continue to drive operational factor acquisition module 100 to carry out work Make.Wherein, the span of Preset Time can be 2 minutes~5 minutes, preferably 3 minutes.
Further, operational factor acquisition module 100 includes:
Temperature detecting unit 101, for detecting and obtaining outdoor environment temperature and indoor environment temperature;
Frequency detecting unit 102, for detecting to compressor operating frequency;
Opening amount detection unit 103, for being detected to expansion valve and being obtained expansion valve opening;
Voltage detection unit 104, for detecting to the input voltage of air-conditioner electric-controlled plate;
Current detecting unit 105, for detecting to the input current of air-conditioner electric-controlled plate;
Power calculation unit 106, obtains air-conditioning input power for calculating according to input voltage and input current.
Further, frequency of abnormity logging modle 400 is in recording exceptional number of times, particularly as follows: once being recorded upper Carry out on the basis of frequency of abnormity obtaining current frequency of abnormity from add-one operation.
Based on application in air-conditioner for the above-mentioned refrigerant circulation abnormality detection control device, the embodiment of the present invention also provides A kind of air-conditioner including above-mentioned refrigerant circulation abnormality detection control device.
In embodiments of the present invention, according to outdoor environment temperature, indoor environment temperature, compression in air-conditioner running Machine running frequency and expansion valve opening, obtain corresponding rated input power, in current air-conditioning from default linked database When the difference of input power and rated input power is more than difference power reference value, judge that refrigerant circulation is abnormal, and recording exceptional number of times, If the not up to default continuous abnormal number of times of frequency of abnormity, compressor shutdown for a period of time after, then reset itself is to drive Refrigerant circulation is made to recover normal;If frequency of abnormity reaches default continuous abnormal number of times, show that refrigerant circulation cannot recover normal, Need to control air-conditioner to shut down avoiding compressor impaired, and be simultaneously emitted by abnormal prompt to inform user, thus solve because Coolant blocks the expansion valve of air-conditioner outdoor unit and leads to the impaired problem of compressor of air conditioner.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.

Claims (11)

1. a kind of refrigerant circulation abnormality detection control method of air-conditioner is it is characterised in that described refrigerant circulation abnormality detection control Method processed comprises the following steps:
A. in air-conditioner running, acquisition outdoor environment temperature, indoor environment temperature, compressor operating frequency, expansion valve are opened Degree and air-conditioning input power;
B. opened according to described outdoor environment temperature, described indoor environment temperature, described compressor operating frequency and described expansion valve Degree, obtains corresponding rated input power from default linked database;
C. judge whether described air-conditioning input power and the difference of described rated input power are more than difference power reference value, be then to hold Row step d, no, then return and execute described step a;
D. judge that refrigerant circulation is abnormal, recording exceptional number of times;
E. judge whether described frequency of abnormity reaches default continuous abnormal number of times, be, then execution step f, no, then execution step g;
F. air-conditioner is controlled to shut down and send abnormal prompt;
G. control compressor to quit work in Preset Time, then control compressor to restart, and return the described step of execution a.
2. refrigerant circulation abnormality detection control method as claimed in claim 1 it is characterised in that described step a include following Step:
Detect and obtain outdoor environment temperature and indoor environment temperature;
Compressor operating frequency is detected;
Expansion valve is detected and is obtained expansion valve opening;
The input voltage of air-conditioner electric-controlled plate is detected;
The input current of air-conditioner electric-controlled plate is detected;
Calculated according to input voltage and input current and obtain air-conditioning input power.
3. refrigerant circulation abnormality detection control method as claimed in claim 1 is it is characterised in that record in described step d The step of frequency of abnormity particularly as follows:
Carry out obtaining current frequency of abnormity from add-one operation on the basis of the upper frequency of abnormity once being recorded.
4. refrigerant circulation abnormality detection control method as claimed in claim 1 is it is characterised in that described default continuous abnormal is secondary Number is 2 times or 3 times.
5. refrigerant circulation abnormality detection control method as claimed in claim 1 is it is characterised in that the value of described Preset Time Scope is 2 minutes~5 minutes.
6. a kind of refrigerant circulation abnormality detection control device of air-conditioner is it is characterised in that described refrigerant circulation abnormality detection control Device processed includes:
Operational factor acquisition module, for obtaining outdoor environment temperature, indoor environment temperature, compression in air-conditioner running Machine running frequency, expansion valve opening and air-conditioning input power;
Data acquisition module, for according to described outdoor environment temperature, described indoor environment temperature, described compressor operating frequency And described expansion valve opening, obtain corresponding rated input power from default linked database;
Power judge module, for judging whether described air-conditioning input power and the difference of described rated input power are more than difference power Reference value, judged result for no when continue drive described operational factor acquisition module be operated;
Frequency of abnormity logging modle, for when the judged result of described power judge module is for being, judging that refrigerant circulation is abnormal, And recording exceptional number of times;
Frequency of abnormity judge module, for judging whether described frequency of abnormity reaches default continuous abnormal number of times;
Shut down and control and reminding module, for when the judged result of described frequency of abnormity judge module is for being, controlling air-conditioner Shut down and send abnormal prompt;
Restart control module, for when the judged result of described frequency of abnormity judge module is no, controlling compressor default Quit work in time, then control compressor to restart, and continue to drive described operational factor acquisition module to be operated.
7. refrigerant circulation abnormality detection control device as claimed in claim 6 is it is characterised in that described operational factor obtains mould Block includes:
Temperature detecting unit, for detecting and obtaining outdoor environment temperature and indoor environment temperature;
Frequency detecting unit, for detecting to compressor operating frequency;
Opening amount detection unit, for being detected to expansion valve and being obtained expansion valve opening;
Voltage detection unit, for detecting to the input voltage of air-conditioner electric-controlled plate;
Current detecting unit, for detecting to the input current of air-conditioner electric-controlled plate;
Power calculation unit, obtains air-conditioning input power for calculating according to input voltage and input current.
8. refrigerant circulation abnormality detection control device as claimed in claim 6 is it is characterised in that described frequency of abnormity record mould Block in recording exceptional number of times, particularly as follows:
Carry out obtaining current frequency of abnormity from add-one operation on the basis of the upper frequency of abnormity once being recorded.
9. refrigerant circulation abnormality detection control device as claimed in claim 6 is it is characterised in that described default continuous abnormal is secondary Number is 2 times or 3 times.
10. refrigerant circulation abnormality detection control device as claimed in claim 6 is it is characterised in that the taking of described Preset Time Value scope is 2 minutes~5 minutes.
A kind of 11. air-conditioners are it is characterised in that the coolant that described air-conditioner is included as described in any one of claim 6 to 10 follows Ring abnormality detection control device.
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