CN104101051A - 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
CN104101051A
CN104101051A CN201410289590.4A CN201410289590A CN104101051A CN 104101051 A CN104101051 A CN 104101051A CN 201410289590 A CN201410289590 A CN 201410289590A CN 104101051 A CN104101051 A CN 104101051A
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abnormal
air
refrigerant circulation
environment temperature
conditioner
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CN201410289590.4A
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CN104101051B (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 refrigerant circulation abnormality detection control method and device
Technical field
The invention belongs to air conditioner controlling technology field, relate in particular to a kind of air-conditioner and refrigerant circulation abnormality detection control method and device.
Background technology
The running environment that air-conditioner faces in daily use process is comparatively complicated, and under certain operating mode, the refrigerant of air-conditioner outdoor unit inside can be because some is former thereby in expansion valve place blockage phenomenon.For example: under heating condition, finish and when compressor again starts, because environment temperature is low, system pressure large and refrigerant viscosity is large, refrigerant easily stops up the expansion valve of air-conditioner outdoor unit in the time of compressor start in defrost, once and expansion valve stops up, refrigerant circulation just there will be extremely.In the situation that refrigerant circulation is abnormal, if compressor long-play will make compressor because of the too high frequent start-stop of internal temperature, thereby cause compressor to be damaged.
Summary of the invention
The object of the present invention is to provide a kind of refrigerant circulation abnormality detection control method of air-conditioner, the expansion valve that is intended to solve because of refrigerant obstruction air-conditioner outdoor unit causes 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 comprises the following steps:
A. in air-conditioner running, obtain outdoor environment temperature, indoor environment temperature, compressor operating frequency, expansion 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, from default linked database, obtain corresponding rated input power;
Whether the difference that C. judges described air-conditioning input power and described rated input power is greater than difference power reference value, is, performs step D, no, returns and carries out described steps A;
D. judge that refrigerant circulation is abnormal, recording exceptional number of times;
E. judge whether described abnormal number of times reaches default continuous abnormal number of times, is, performs step F, no, perform step G;
F. control air-conditioner and shut down and send abnormal prompt;
G. control compressor and quit work in Preset Time, then control compressor and again start, and return and carry out described steps A.
Another object of the present invention is also to provide a kind of refrigerant circulation abnormality detection control device of air-conditioner, and it comprises:
Operational factor acquisition module, for obtaining outdoor environment temperature, indoor environment temperature, compressor operating frequency, expansion valve opening and air-conditioning input power at air-conditioner running;
Data acquisition module for 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;
Whether power judge module, be greater than difference power reference value for the difference that judges described air-conditioning input power and described rated input power, continues while being no to drive described operational factor acquisition module to carry out work in judged result;
Abnormal number of times logging modle, in the judged result of described power judge module when being, judgement refrigerant circulation is abnormal, and recording exceptional number of times;
Abnormal number of times judge module, for judging whether described abnormal number of times reaches default continuous abnormal number of times;
Shut down and control and reminding module, in the judged result of described abnormal number of times judge module when being, abnormal prompt is shut down and sent to control air-conditioner;
Restart control module, when being no in the judged result of described abnormal number of times judge module, controlling compressor and quit work in Preset Time, then control compressor and again start, and continue to drive described operational factor acquisition module to carry out work.
Another object of the present invention is also to provide a kind of air-conditioner that comprises above-mentioned refrigerant circulation abnormality detection control device.
In the present invention, in air-conditioner running according to outdoor environment temperature, indoor environment temperature, compressor operating frequency and expansion valve opening, from default linked database, obtain corresponding rated input power, in the time that the difference of current air-conditioning input power and rated input power is greater than difference power reference value, judge that refrigerant circulation is abnormal, and recording exceptional number of times, if abnormal number of times does not reach default continuous abnormal number of times, after compressor shutdown a period of time, then restart compressor and recover normal to order about refrigerant circulation; If abnormal number of times reaches default continuous abnormal number of times; show that refrigerant circulation cannot recover normal; need to control air-conditioner shuts down to avoid compressor impaired; and send abnormal prompt to inform user simultaneously, cause the impaired problem of compressor of air conditioner thereby solved because refrigerant stops up the expansion valve of air-conditioner outdoor unit.
Brief description of the drawings
Fig. 1 is the realization flow figure of the refrigerant circulation abnormality detection control method of the air-conditioner that provides of the embodiment of the present invention;
Fig. 2 is the structure chart of the refrigerant circulation abnormality detection control device of the air-conditioner that provides of the embodiment of the present invention.
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, the present invention is 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.
Fig. 1 shows the realization flow of the refrigerant circulation abnormality detection control method of the air-conditioner that the embodiment of the present invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows:
In step S1, in air-conditioner running, obtain outdoor environment temperature, indoor environment temperature, compressor operating frequency, expansion valve opening and air-conditioning input power.Step S1 specifically comprises the following steps:
Detect and obtain outdoor environment temperature and indoor environment temperature;
Compressor operating frequency is detected;
Expansion valve is detected and obtains expansion valve opening;
Input voltage to air-conditioner electric-controlled plate detects;
Input current to air-conditioner electric-controlled plate detects;
Obtain air-conditioning input power according to input voltage and input current calculating.
In step S2, according to outdoor environment temperature, indoor environment temperature, compressor operating frequency and expansion valve opening, from default linked database, obtain corresponding rated input power.
It should be noted that, before air-conditioner dispatches from the factory, can be in default outdoor environment temperature scope, indoor environment temperature scope, in expansion valve opening scope and compressor operating frequency range, control air-conditioner at different outdoor environment temperatures, indoor environment temperature, under the condition of expansion valve opening and compressor operating frequency, realize normal operation, and the running frequency of indoor fan and outdoor fan is to be changeless all the time, work in different outdoor environment temperatures at air-conditioner, indoor environment temperature, when expansion valve opening and compressor operating frequency, the input power of corresponding air-conditioner is recorded, and by different outdoor environment temperatures, indoor environment temperature, expansion valve opening and compressor operating frequency are stored in the memory of air-conditioner inside with many groups associated data group that corresponding input power forms, thereby form default linked database.Wherein, the input power in default linked database is exactly above-mentioned rated input power.
Particularly, suppose that outdoor environment temperature scope is T min~T max, indoor environment temperature scope is t min~t max, expansion valve opening scope is K min~K max, compressor operating frequency range is ω min~ω max, the running frequency of indoor fan is f in, the running frequency of outdoor fan is f out, f inand f outbe fixed value.Before air-conditioner dispatches from the factory, can be at T min~T maxinterior according to temperature adjusted value Δ T adjustment outdoor environment temperature, at t min~t maxinterior according to temperature adjusted value Δ t adjustment indoor environment temperature, at K min~K maxinterior according to aperture adjusted value Δ K adjustment expansion valve opening, at ω min~ω maxin set different compressor operating frequencies according to frequency adjusted value Δ ω, control air-conditioner and carry out work under the above-mentioned different outdoor environment temperature setting, indoor environment temperature, expansion valve opening and compressor operating frequency, and corresponding air-conditioning input power is recorded, then form the data group that many group outdoor environment temperatures, indoor environment temperature, expansion valve opening and compressor operating frequency are associated with air-conditioning input power, thereby form a database that comprises many group associated data groups, and be stored in the memory of air-conditioner inside.
In step S3, judge whether the difference of air-conditioning input power and rated input power is greater than difference power reference value, be, perform step S4, no, return to execution step S1.
It should be noted that, in the time that air-conditioner occurs that because expansion valve stops up refrigerant circulation is abnormal, there is larger difference in input power when its input power and normal operation, so the embodiment of the present invention is introduced above-mentioned difference power reference value, difference power reference value is used for weighing air-conditioner and whether occurs that because expansion valve stops up refrigerant circulation is abnormal.
In step S4, judge that refrigerant circulation is abnormal, recording exceptional number of times.
Wherein, the step of the recording exceptional number of times in step S4 is specially:
On the basis of the upper abnormal number of times that once recorded, carry out obtaining current abnormal number of times from add-one operation.
In step S5, judge whether abnormal number of times reaches default continuous abnormal number of times, is, performs step S6, no, perform step S7.
In step S6, control air-conditioner and shut down and send abnormal prompt.Wherein, abnormal prompt can be that auditory tone cues, demonstration information indicating or sound are synchronizeed and pointed out with demonstration information.
In step S7, control compressor and quit work in Preset Time, then control compressor and again start, and return to execution step S1.Wherein, the span of Preset Time can be 2 minutes~5 minutes, is preferably 3 minutes.
For from step S5 to step S7, it should be noted that:
In step S5, default continuous abnormal number of times is to stop up for weighing expansion valve the abnormal order of severity of refrigerant circulation causing, and it can be 2 times or 3 times.
In step S7, in the time that abnormal number of times does not reach default continuous abnormal number of times, first control compressor quits work in Preset Time, if in Preset Time, outdoor environment temperature raises and system pressure reduces, refrigerant viscosity can correspondingly reduce, the blockage of expansion valve also can be alleviated to some extent, so, after Preset Time, restart again compressor, just can make refrigerant circulation recover normal, therefore, control compressor out-of-work step in Preset Time and be actually the effect of playing time delay buffering, be conducive to obtain good refrigerant circulation condition.
In step S6; in the time that abnormal number of times reaches default continuous abnormal number of times; show that expansion valve stops up comparatively serious; cannot make refrigerant circulation recover normal by step S7; so need to control air-conditioner shuts down and sends abnormal prompt to user; it is impaired that shutdown contributes to protect compressor to avoid, and abnormal prompt is conducive to reminding user contact producer air-conditioner is carried out to corresponding malfunction elimination and maintenance.
Fig. 2 shows the structure of the refrigerant circulation abnormality detection control device of the air-conditioner that the embodiment of the present invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows:
Refrigerant circulation abnormality detection control device comprises operational factor acquisition module 100, data acquisition module 200, power judge module 300, abnormal number of times logging modle 400, abnormal number of times judge module 500, shuts down and control with reminding module 600 and restart control module 700.
Operational factor acquisition module 100 is for obtaining outdoor environment temperature, indoor environment temperature, compressor operating frequency, expansion valve opening and air-conditioning input power at air-conditioner running.
Outdoor environment temperature, indoor environment temperature, compressor operating frequency and the expansion valve opening of data acquisition module 200 for obtaining according to operational factor acquisition module 100 obtains corresponding rated input power from default linked database.
Whether power judge module 300 is greater than difference power reference value for the difference that judges air-conditioning input power and rated input power, continues while being no to drive operational factor acquisition module 100 to carry out work in judged result.
Abnormal number of times logging modle 400 in the judged result of power judge module 300 when being, judgement refrigerant circulation is abnormal, and recording exceptional number of times.
Abnormal number of times judge module 500 is for judging whether the abnormal number of times that abnormal number of times logging modle 400 records reaches default continuous abnormal number of times.Wherein, default continuous abnormal number of times can be 2 times or 3 times.
Shut down control with reminding module 600 in the judged result of abnormal number of times judge module 500 when being, abnormal prompt is shut down and sent to control air-conditioner.
Restart control module 700, when being no in the judged result of abnormal number of times judge module 500, controlling compressor and quit work in Preset Time, then control compressor and again start, and continue to drive operational factor acquisition module 100 to carry out work.Wherein, the span of Preset Time can be 2 minutes~5 minutes, is preferably 3 minutes.
Further, operational factor acquisition module 100 comprises:
Temperature detecting unit 101, for detection of and obtain outdoor environment temperature and indoor environment temperature;
Frequency detecting unit 102, for detecting compressor operating frequency;
Measuring opening unit 103, for detecting and obtain expansion valve opening to expansion valve;
Voltage detection unit 104, for detecting the input voltage of air-conditioner electric-controlled plate;
Current detecting unit 105, for detecting the input current of air-conditioner electric-controlled plate;
Power calculation unit 106, for obtaining air-conditioning input power according to input voltage and input current calculating.
Further, abnormal number of times logging modle 400, in the time of recording exceptional number of times, is specially: on the basis of the upper abnormal number of times that once recorded, carry out obtaining current abnormal number of times from add-one operation.
The application of refrigerant circulation abnormality detection control device based on above-mentioned in air-conditioner, the embodiment of the present invention also provides a kind of air-conditioner that comprises above-mentioned refrigerant circulation abnormality detection control device.
In embodiments of the present invention, in air-conditioner running according to outdoor environment temperature, indoor environment temperature, compressor operating frequency and expansion valve opening, from default linked database, obtain corresponding rated input power, in the time that the difference of current air-conditioning input power and rated input power is greater than difference power reference value, judge that refrigerant circulation is abnormal, and recording exceptional number of times, if abnormal number of times does not reach default continuous abnormal number of times, after compressor shutdown a period of time, then restart compressor and recover normal to order about refrigerant circulation; If abnormal number of times reaches default continuous abnormal number of times; show that refrigerant circulation cannot recover normal; need to control air-conditioner shuts down to avoid compressor impaired; and send abnormal prompt to inform user simultaneously, cause the impaired problem of compressor of air conditioner thereby solved because refrigerant stops up the expansion valve of air-conditioner outdoor unit.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (11)

1. a refrigerant circulation abnormality detection control method for air-conditioner, is characterized in that, described refrigerant circulation abnormality detection control method comprises the following steps:
A. in air-conditioner running, obtain outdoor environment temperature, indoor environment temperature, compressor operating frequency, expansion 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, from default linked database, obtain corresponding rated input power;
Whether the difference that C. judges described air-conditioning input power and described rated input power is greater than difference power reference value, is, performs step D, no, returns and carries out described steps A;
D. judge that refrigerant circulation is abnormal, recording exceptional number of times;
E. judge whether described abnormal number of times reaches default continuous abnormal number of times, is, performs step F, no, perform step G;
F. control air-conditioner and shut down and send abnormal prompt;
G. control compressor and quit work in Preset Time, then control compressor and again start, and return and carry out described steps A.
2. refrigerant circulation abnormality detection control method as claimed in claim 1, is characterized in that, described steps A comprises the following steps:
Detect and obtain outdoor environment temperature and indoor environment temperature;
Compressor operating frequency is detected;
Expansion valve is detected and obtains expansion valve opening;
Input voltage to air-conditioner electric-controlled plate detects;
Input current to air-conditioner electric-controlled plate detects;
Obtain air-conditioning input power according to input voltage and input current calculating.
3. refrigerant circulation abnormality detection control method as claimed in claim 1, is characterized in that, the step of the recording exceptional number of times in described step D is specially:
On the basis of the upper abnormal number of times that once recorded, carry out obtaining current abnormal number of times from add-one operation.
4. refrigerant circulation abnormality detection control method as claimed in claim 1, is characterized in that, described default continuous abnormal number of times is 2 times or 3 times.
5. refrigerant circulation abnormality detection control method as claimed in claim 1, is characterized in that, the span of described Preset Time is 2 minutes~5 minutes.
6. a refrigerant circulation abnormality detection control device for air-conditioner, is characterized in that, described refrigerant circulation abnormality detection control device comprises:
Operational factor acquisition module, for obtaining outdoor environment temperature, indoor environment temperature, compressor operating frequency, expansion valve opening and air-conditioning input power at air-conditioner running;
Data acquisition module for 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;
Whether power judge module, be greater than difference power reference value for the difference that judges described air-conditioning input power and described rated input power, continues while being no to drive described operational factor acquisition module to carry out work in judged result;
Abnormal number of times logging modle, in the judged result of described power judge module when being, judgement refrigerant circulation is abnormal, and recording exceptional number of times;
Abnormal number of times judge module, for judging whether described abnormal number of times reaches default continuous abnormal number of times;
Shut down and control and reminding module, in the judged result of described abnormal number of times judge module when being, abnormal prompt is shut down and sent to control air-conditioner;
Restart control module, when being no in the judged result of described abnormal number of times judge module, controlling compressor and quit work in Preset Time, then control compressor and again start, and continue to drive described operational factor acquisition module to carry out work.
7. refrigerant circulation abnormality detection control device as claimed in claim 6, is characterized in that, described operational factor acquisition module comprises:
Temperature detecting unit, for detection of and obtain outdoor environment temperature and indoor environment temperature;
Frequency detecting unit, for detecting compressor operating frequency;
Measuring opening unit, for detecting and obtain expansion valve opening to expansion valve;
Voltage detection unit, for detecting the input voltage of air-conditioner electric-controlled plate;
Current detecting unit, for detecting the input current of air-conditioner electric-controlled plate;
Power calculation unit, for obtaining air-conditioning input power according to input voltage and input current calculating.
8. refrigerant circulation abnormality detection control device as claimed in claim 6, is characterized in that, described abnormal number of times logging modle, in the time of recording exceptional number of times, is specially:
On the basis of the upper abnormal number of times that once recorded, carry out obtaining current abnormal number of times from add-one operation.
9. refrigerant circulation abnormality detection control device as claimed in claim 6, is characterized in that, described default continuous abnormal number of times is 2 times or 3 times.
10. refrigerant circulation abnormality detection control device as claimed in claim 6, is characterized in that, the span of described Preset Time is 2 minutes~5 minutes.
11. 1 kinds of air-conditioners, is characterized in that, described air-conditioner comprises the refrigerant circulation abnormality detection control device as described in claim 6 to 10.
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CN104864555A (en) * 2015-04-30 2015-08-26 广东美的制冷设备有限公司 Control method and device of air conditioner system with R290 refrigerant
CN105864953A (en) * 2015-01-22 2016-08-17 青岛海尔空调器有限总公司 Air conditioner throttling part blockage detection method and device and air conditioner
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WO2019140918A1 (en) * 2018-01-22 2019-07-25 格力电器(武汉)有限公司 Display panel control method, apparatus, system, display panel, and device unit
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CN109323365A (en) * 2018-09-30 2019-02-12 广东美的制冷设备有限公司 The method and apparatus and air-conditioning and storage medium of diagnosis air-conditioning obstruction failure
CN109708245A (en) * 2019-01-04 2019-05-03 珠海格力电器股份有限公司 Air-conditioning maintains based reminding method, device, control equipment, medium and assembled air-conditioner
CN109915991A (en) * 2019-02-28 2019-06-21 广东美的暖通设备有限公司 The control method and device of multi-line system blowout prevention enthalpy valve body blocking
CN110146318A (en) * 2019-05-28 2019-08-20 格力电器(武汉)有限公司 Solve the low method of air-conditioning entropy detection pressure testing power
CN113091205A (en) * 2020-08-19 2021-07-09 广州松下空调器有限公司 Air conditioner abnormity detection method and device

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