CN102927659B - Defrost control system and method of air conditioner - Google Patents
Defrost control system and method of air conditioner Download PDFInfo
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- CN102927659B CN102927659B CN201210491288.8A CN201210491288A CN102927659B CN 102927659 B CN102927659 B CN 102927659B CN 201210491288 A CN201210491288 A CN 201210491288A CN 102927659 B CN102927659 B CN 102927659B
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Abstract
The invention relates to a defrost technology of an air conditioner, and discloses a defrost control system of the air conditioner. Through the synthetic judgment of defrost conditions, the beginning time point and the ending time point of defrost are controlled accurately, effective defrost is realized, and energy source waste is reduced; state parameters of an air conditioner outdoor machine heat exchanger, which are collected by a sensor unit, are made into a time function curve through adding a curve making unit for the system, and are sequentially referred as a reference threshold, and the determination of beginning/ending conditions for automatic defrost is more accurate; and pictures of the air conditioner outdoor machine heat exchanger are acquired through adding an image acquiring unit, the pictures are compared with the pre-stored pictures, whether the beginning/ending conditions of defrost are achieved is determined, and a more accurate basis is provided for automatic defrost. Additionally the invention also discloses a corresponding air-conditioner defrost control method which is suitable for air-conditioner defrost.
Description
Technical field
The present invention relates to air-conditioner Defrost technology, specifically, relate to air-conditioner defrost control system and control method thereof.
Background technology
Air-conditioner has become the important component part of people's life as refrigeration or heating equipment, drastically increases the comfortableness of people's life; But the operation of air-conditioner but needs to expend more electric energy, particularly air-conditioner when the time that heats is longer, on the heat exchanger of off-premises station, meeting production frost, will have a strong impact on heating effect, and also can waste a large amount of electric energy.The frost produced when heating to remove, air-conditioner often when the temperature running regular hour all after dates or heat exchanger of outdoor unit meets some requirements, just starts defrosting, and after defrosting terminates, air-conditioning could continue to run.
Publication number be CN123500 application discloses a kind of method removing air-conditioner outdoor unit rime ice, it judges temperature maximum temperature by recording room, within the time subsequently, every certain time interval, see and indoorly judge whether temperature declines continuously, or when indoor judgement temperature drops to below a certain design temperature, just start defrost operation.
Publication number be CN101988839 application discloses a kind of system removing air-conditioner outdoor unit frost, frost checkout gear is comprised in its technical scheme, this frost checkout gear comprises luminescent device and light receiving element, frost is utilized to become the barrier of beam channel, light beam is blocked or reflects, what change light passes through intensity, light receiving element is outputed signal change, or by the cooperation of line temperature sensor and frost checkout gear, defrosting is judged, thus completes defrosting.
China is vast in territory, and from south to north, from the east to the west, in the same time on the same day, the temperature difference differs greatly; Even if in areal, environment temperature is also constantly change, if adopt at interval of a period of time interval Defrost method or the Defrost method by detection indoor coil pipe, may be often defrosting starting point and end point judge inaccurate, start defrost too early or excessively late, defrosting terminate too early or excessively late, cause the waste of the energy, also cannot effectively defrost.In addition, carried out the scheme defrosted by luminescent device and light receiving element, when heat exchanger of outdoor unit fin has distortion, light cannot pass through, and can cause defrosting misoperation, affects the use of user, also wastes energy.
Summary of the invention
Technical problem to be solved by this invention is: propose a kind of air-conditioner defrost control system and method, by the comprehensive descision to defrosting condition, controls defrosting sart point in time and end time point exactly, realizes effectively defrosting, reduces the waste of the energy.
The present invention solves the problems of the technologies described above adopted technical scheme:
Air-conditioner defrost control system, comprising:
Sensor unit, for gathering the current state parameter of the heat exchanger of off-premises station at interval of a period of time, is transferred to logic judgment unit;
Logic judgment unit, the current state parameter for the heat exchanger of the off-premises station with reference to threshold value and sensor unit collection contrasts, and when reaching defrosting start/end condition, to defrosting, executing agency sends command adapted thereto;
Defrosting executing agency, for the command adapted thereto sent according to logic judgment unit, starts or terminates defrosting action;
This control system also comprises curve plotting unit, the state parameter of the heat exchanger of the off-premises station of collection is also transferred to curve plotting unit by described sensor unit, the state parameter that described curve plotting unit comes according to sensor unit transmission makes function of time curve, using the foundation as logic judgment unit reference threshold, determine the best defrosting start/end time with this.
Further, this control system also comprises: image acquisition unit, for the image that the heat exchanger gathering off-premises station at interval of a period of time is current, and be transferred to logic judgment unit, this image and the image prestored compare by described logic judgment unit, and the current state parameter of combined sensor unit collection and the contrast information summary of reference threshold judge whether to reach the start/end condition that defrosts.
Further, this image and the image prestored compare by described logic judgment unit, and the current state parameter of combined sensor unit collection and the contrast information summary of reference threshold judge whether to reach the defrost method of start/end condition is: when the current state parameter of the heat exchanger of outdoor unit that logic judgment unit obtains from sensor unit reaches reference threshold, export a signal to image acquisition unit, image acquisition unit obtains the image of the heat exchanger of off-premises station, and be transferred to logic judgment unit, this image and the image prestored compare by logic judgment unit, and make Logic judgment, judge whether to reach defrosting start/end condition.
Further, this control system also comprises:
Display unit, described display unit is used for showing defrost process.
Further, this control system also comprises:
Defrost control button, described defrost control button is connected with defrosting executing agency, for accepting defrost control signal, starting defrosting executing agency and defrosting.
Further, sensor unit comprises: temperature sensor and/or pressure sensor and/or current sensor and/or voltage sensor.
In addition, present invention also offers a kind of air-conditioner defrosting control method, the method comprises the following steps:
A. image acquisition unit gathers the image of the heat exchanger of off-premises station at interval of a period of time, and is transferred to logic judgment unit;
B. this image and the image prestored contrast by logic judgment unit, judge whether to reach defrosting beginning condition, if reach defrosting beginning condition, then enter step c, otherwise return step a;
C. logic judgment unit notice defrosting executing agency carries out defrosting action;
D. logic judgment unit continues the present image obtaining heat exchanger of outdoor unit from image acquisition unit, and contrasts with pre-stored image, judges whether to reach defrosting termination condition, if reach defrosting termination condition, then enters step e, otherwise return steps d;
E. logic judgment unit notice defrosting executing agency stops defrosting action.
Further, described in the image that prestores be the image of heat exchanger before dispatching from the factory of off-premises station, or be the image of heat exchanger after having defrosted of off-premises station.
In addition, the air-conditioner defrosting control method in the present invention can also adopt following scheme to realize:
A. sensor unit gathers the state parameter of the heat exchanger of off-premises station at interval of a period of time, and is transferred to logic judgment unit;
B. this state parameter and reference threshold contrast by logic judgment unit, judge whether to reach reference threshold, if reached, then transmit control signal to image acquisition unit, enter step c, otherwise, return step a;
C. image acquisition unit gathers the image of heat exchanger of outdoor unit at interval of a period of time, and is transferred to logic judgment unit;
D. this image and the image prestored contrast by logic judgment unit, judge whether to reach defrosting beginning condition, if reach defrosting beginning condition, then enter step e, otherwise return step c;
E. logic judgment unit notice defrosting executing agency performs defrosting action;
F. logic judgment unit continues the present image obtaining heat exchanger of outdoor unit from image acquisition unit, and contrasts with the image prestored, and judges whether to reach defrosting termination condition, if reach defrosting termination condition, then enters step g, otherwise return step f;
G. logic judgment unit notice defrosting executing agency stops defrosting action.
Further, in step b, described reference threshold derives from the function of time curve that curve plotting unit makes.
The invention has the beneficial effects as follows: by setting up curve plotting unit, the state parameter of the air-conditioner outdoor unit heat exchanger of sensor unit collection is made into function of time curve, and successively as reference threshold value, the judgement for the start/end condition of automatic defrosting is more accurate; And the picture gathering air-conditioner outdoor unit heat exchanger by setting up image acquisition unit contrasts with the picture prestored, determine whether to reach defrosting start/end condition, for automatic defrosting provides foundation more accurately; In addition, the present invention, except automatic defrosting system, can also receive defrost control signal by the defrost control button be arranged in air-conditioner defrost control system, meets the demand of instant defrosting, makes defrosting more flexible.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the embodiment of air-conditioner defrost control system;
Fig. 2 is the flow chart of an embodiment of air-conditioner defrosting control method;
Fig. 3 is the flow chart of another embodiment of air-conditioner defrosting control method.
Detailed description of the invention
Below in conjunction with drawings and Examples, technical scheme of the present invention is further described.
See Fig. 1, the air-conditioner defrost control system in this example comprises: sensor unit, logic judgment unit, curve plotting unit, defrosting executing agency, image acquisition unit, display unit, defrost control button; Described sensor unit, curve plotting unit, image acquisition unit, display unit, defrosting executing agency all connect logic judgment unit; Described sensor unit is also connected with curve plotting unit; Described defrost control button is also connected with defrosting executing agency;
Wherein, sensor unit is used for the current state parameter of the heat exchanger gathering off-premises station at interval of a period of time (the concrete time can preset in the program of air-conditioner), is transferred to logic judgment unit and curve plotting unit; This sensor unit can be any one of temperature sensor, pressure sensor, current sensor or voltage sensor, also can be the combination of its any a few person;
Logic judgment unit, curve plotting unit are be arranged on the software unit in air-conditioner program, logic judgment unit contrasts for the current state parameter of the heat exchanger of the off-premises station with reference to threshold value and sensor unit collection, when reaching defrosting start/end condition, to defrosting, executing agency sends command adapted thereto; The state parameter that described curve plotting unit comes according to sensor unit transmission makes function of time curve, using the foundation as logic judgment unit reference threshold, determines the best defrosting start/end time with this;
Defrosting executing agency is the hardware configuration itself possessed in air-conditioner, repeats no more here;
Image acquisition unit is used at interval of a period of time (same, the concrete time can preset in the program of air-conditioner) gather the current image of the heat exchanger of off-premises station, and be transferred to logic judgment unit, (image prestored here can for air-conditioner be before dispatching from the factory with the image prestored by this image for described logic judgment unit, the image of the heat exchanger of its off-premises station, namely spotless image; Also can be the image of the heat exchanger of the off-premises station after having defrosted) compare, and the current state parameter of combined sensor unit collection and the contrast information summary of reference threshold judge whether to reach the start/end condition that defrosts; This image acquisition unit can be infrared photography unit or CCD image unit;
Display unit is for showing the current state parameter of air-conditioner or defrost process, and this display unit can adopt current more popular LED screen or LCD screen;
Defrost control button can be arranged in air conditioner body or on the remote controller of air-conditioner, user can use this button to send defrosting order to air-conditioner, to realize instant defrosting, certainly, when user adopts this instant defrost function, present image, the instant current state parameter obtaining the heat exchanger of off-premises station of the corresponding just heat exchanger of instant acquisition off-premises station of image acquisition unit above-mentioned in defrost control system, sensor unit;
In addition, if manufacturer needs the best defrosting time of the change of the environment temperature understanding national different regions and different regions, can also communication module and remote control module be set in aircondition, thus complete transmission and the exchange of teledata.
See Fig. 2, be the flow chart of an embodiment of air-conditioner defrosting control method, the air-conditioner defrosting control method in this example comprises the following steps:
A. image acquisition unit gathers the image of the heat exchanger of off-premises station at interval of a period of time, and is transferred to logic judgment unit;
B. this image and the image prestored contrast by logic judgment unit, judge whether to reach defrosting beginning condition, if reach defrosting beginning condition, then enter step c, otherwise return step a;
C. logic judgment unit notice defrosting executing agency carries out defrosting action;
D. logic judgment unit continues the present image obtaining heat exchanger of outdoor unit from image acquisition unit, and contrasts with pre-stored image, judges whether to reach defrosting termination condition, if reach defrosting termination condition, then enters step e, otherwise return steps d;
E. logic judgment unit notice defrosting executing agency stops defrosting action.
See Fig. 3, for the flow chart of another embodiment of air-conditioner defrosting control method, this example is compared with the embodiment in Fig. 2, add utilize sensor gather heat exchanger of outdoor unit state parameter and compared with reference threshold, with judge whether start image acquisition unit to carry out the step of IMAQ; Namely this example considers state parameter and its present image of heat exchanger of outdoor unit, these factors are utilized to carry out comprehensive descision, to determine that best defrosting starts or the termination condition that defrosts, the processing mode therefore in this example, relative to the processing mode of the embodiment in Fig. 2, defrosts more accurate;
Air-conditioner defrosting control method in this example comprises the following steps:
A. sensor unit gathers the state parameter of the heat exchanger of off-premises station at interval of a period of time, and is transferred to logic judgment unit;
B. this state parameter and reference threshold contrast by logic judgment unit, judge whether to reach reference threshold, if reached, then transmit control signal to image acquisition unit, enter step c, otherwise, return step a;
C. image acquisition unit gathers the image of heat exchanger of outdoor unit at interval of a period of time, and is transferred to logic judgment unit;
D. this image and the image prestored contrast by logic judgment unit, judge whether to reach defrosting beginning condition, if reach defrosting beginning condition, then enter step e, otherwise return step c;
E. logic judgment unit notice defrosting executing agency performs defrosting action;
F. logic judgment unit continues the present image obtaining heat exchanger of outdoor unit from image acquisition unit, and contrasts with the image prestored, and judges whether to reach defrosting termination condition, if reach defrosting termination condition, then enters step g, otherwise return step f;
G. logic judgment unit notice defrosting executing agency stops defrosting action.
The technical scheme of application claims protection comprises but is not limited only to above-described embodiment, and those skilled in the art easily expects some equivalent replacement/amendments according to the above-mentioned description of this invention, and it is all belonging within the protection domain under Spirit Essence of the present invention.
Claims (8)
1. air-conditioner defrost control system, comprising:
Sensor unit, for gathering the current state parameter of the heat exchanger of off-premises station at interval of a period of time, is transferred to logic judgment unit;
Logic judgment unit, the current state parameter for the heat exchanger of the off-premises station with reference to threshold value and sensor unit collection contrasts, and when reaching defrosting start/end condition, to defrosting, executing agency sends command adapted thereto;
Defrosting executing agency, for the command adapted thereto sent according to logic judgment unit, starts or terminates defrosting action;
It is characterized in that, this control system also comprises curve plotting unit, the state parameter of the heat exchanger of the off-premises station of collection is also transferred to curve plotting unit by described sensor unit, the state parameter that described curve plotting unit comes according to sensor unit transmission makes function of time curve, using the foundation as logic judgment unit reference threshold, determine the best defrosting start/end time with this.
2. air-conditioner defrost control system as claimed in claim 1, it is characterized in that, this control system also comprises: image acquisition unit, for the image that the heat exchanger gathering off-premises station at interval of a period of time is current, and be transferred to logic judgment unit, this image and the image prestored compare by described logic judgment unit, and the current state parameter of combined sensor unit collection and the contrast information summary of reference threshold judge whether to reach the start/end condition that defrosts.
3. air-conditioner defrost control system as claimed in claim 2, it is characterized in that, this image and the image prestored compare by described logic judgment unit, and the current state parameter of combined sensor unit collection and the contrast information summary of reference threshold judge whether to reach the defrost method of start/end condition is: when the current state parameter of the heat exchanger of outdoor unit that logic judgment unit obtains from sensor unit reaches reference threshold, export a signal to image acquisition unit, image acquisition unit obtains the image of the heat exchanger of off-premises station, and be transferred to logic judgment unit, this image and the image prestored compare by logic judgment unit, and make Logic judgment, judge whether to reach defrosting start/end condition.
4. air-conditioner defrost control system as claimed in claim 1, it is characterized in that, this control system also comprises:
Display unit, described display unit is used for showing defrost process.
5. air-conditioner defrost control system as claimed in claim 1, it is characterized in that, this control system also comprises:
Defrost control button, described defrost control button is connected with defrosting executing agency, for accepting defrost control signal, starting defrosting executing agency and defrosting.
6. the air-conditioner defrost control system as described in claim 1-5 any one, it is characterized in that, sensor unit comprises: temperature sensor and/or pressure sensor and/or current sensor and/or voltage sensor.
7. air-conditioner defrosting control method, is characterized in that, the method comprises the following steps:
A. sensor unit gathers the state parameter of the heat exchanger of off-premises station at interval of a period of time, and is transferred to logic judgment unit;
B. this state parameter and reference threshold contrast by logic judgment unit, judge whether to reach reference threshold, if reached, then transmit control signal to image acquisition unit, enter step c, otherwise, return step a;
C. image acquisition unit gathers the image of heat exchanger of outdoor unit at interval of a period of time, and is transferred to logic judgment unit;
D. this image and the image prestored contrast by logic judgment unit, judge whether to reach defrosting beginning condition, if reach defrosting beginning condition, then enter step e, otherwise return step c;
E. logic judgment unit notice defrosting executing agency performs defrosting action;
F. logic judgment unit continues the present image obtaining heat exchanger of outdoor unit from image acquisition unit, and contrasts with the image prestored, and judges whether to reach defrosting termination condition, if reach defrosting termination condition, then enters step g, otherwise return step f;
G. logic judgment unit notice defrosting executing agency stops defrosting action.
8. air-conditioner defrosting control method as claimed in claim 7, is characterized in that, in step b, described reference threshold derives from the function of time curve that curve plotting unit makes.
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| CN201210491288.8A CN102927659B (en) | 2012-11-27 | 2012-11-27 | Defrost control system and method of air conditioner |
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| CN103234261B (en) * | 2013-05-02 | 2015-09-30 | 四川长虹电器股份有限公司 | The method and system of air conditioner dedusting |
| CN103673212A (en) * | 2013-11-19 | 2014-03-26 | 四川长虹电器股份有限公司 | Control device and control method |
| CN104728989B (en) * | 2013-12-18 | 2017-07-28 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and the air conditioner for performing the defrosting control method |
| CN104896672B (en) * | 2015-06-11 | 2018-11-02 | Tcl空调器(中山)有限公司 | The defrosting control method and air conditioner of air conditioner |
| CN106288158A (en) * | 2016-08-05 | 2017-01-04 | 珠海格力电器股份有限公司 | Air-conditioning and defrosting method thereof and device |
| CN106766019B (en) * | 2017-03-17 | 2022-04-19 | 珠海格力电器股份有限公司 | Air conditioner defrosting control system and air conditioner defrosting control method |
| ES2911549T3 (en) * | 2017-08-28 | 2022-05-19 | Daikin Ind Ltd | air conditioning device |
| CN107755097A (en) * | 2017-09-27 | 2018-03-06 | 珠海格力电器股份有限公司 | A kind for the treatment of method and apparatus of electrostatic purifier |
| CN109855235A (en) * | 2019-01-28 | 2019-06-07 | 四川长虹电器股份有限公司 | A kind of air conditioner defrosting system and method |
| CN111707030A (en) * | 2020-06-05 | 2020-09-25 | 广东纽恩泰新能源科技发展有限公司 | Heat pump control system and method based on visual defrosting |
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| KR960024086A (en) * | 1994-12-23 | 1996-07-20 | 김광호 | Defroster of air conditioner and control method |
| CN101303185A (en) * | 2008-05-22 | 2008-11-12 | 宁波奥克斯电气有限公司 | Defrosting method for heat pump type air conditioner |
| KR20100032796A (en) * | 2008-09-18 | 2010-03-26 | 삼성전자주식회사 | Method of controlling air conditioner |
| CN101929755A (en) * | 2009-06-23 | 2010-12-29 | 南京理工大学 | Image recognition technology-based air source heat pump defrosting system and control method thereof |
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Effective date of registration: 20190211 Address after: 621000, No. 35 Mian Xing Dong Road, hi tech Zone, Sichuan, Mianyang Patentee after: Sichuan Changhong Air-Coditioning Co., Ltd. Address before: 621000, No. 35 Mian Xing Dong Road, hi tech Zone, Sichuan, Mianyang Patentee before: Sichuan Changhong Electrical Appliance Co., Ltd. |