CN109210695B - Control method for automatic remediation after freezing of air conditioner - Google Patents
Control method for automatic remediation after freezing of air conditioner Download PDFInfo
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- CN109210695B CN109210695B CN201811051199.5A CN201811051199A CN109210695B CN 109210695 B CN109210695 B CN 109210695B CN 201811051199 A CN201811051199 A CN 201811051199A CN 109210695 B CN109210695 B CN 109210695B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method for automatic remediation of an air conditioner after freezing, and belongs to the field of air conditioner control. The method comprises the steps of obtaining the inlet temperature and the outlet temperature of a heat exchanger of the indoor unit, comparing the obtained inlet temperature and outlet temperature with preset temperatures to control the starting/exiting of automatic remediation, and recording feedback fault signals. The invention solves the problems that the existing anti-freezing protection mechanism has long logic, few control variables, many operation variables and poor detection precision, is difficult to effectively judge the integral freezing condition of the indoor unit, and is easy to cause local freezing and the protection mechanism is not started. The invention can also monitor the failure area, failure frequency, the failure proportion of the air conditioners of the same type, the type which is easy to fail and the like of the anti-freezing protection mechanism through the fault information feedback, show hidden problems and is beneficial to the iterative upgrade of the air conditioning technology.
Description
Technical Field
The invention belongs to the technical field of air conditioner control, and particularly relates to a control method for automatic remediation of an air conditioner after freezing.
Background
When the air conditioner is in refrigeration or dehumidification operation, the heat exchanger of the indoor unit is always in a low-temperature state, so that the freezing phenomenon is easily generated, the refrigeration effect of the air conditioner is further influenced, and the refrigeration capacity of the air conditioner is weaker and weaker.
The conventional air conditioner is provided with a temperature sensor on a coil of an indoor unit, so that the air conditioner can judge the freezing condition of the coil of the indoor unit according to the temperature of the coil of the indoor unit, and when the coil of the indoor unit freezes, the air conditioner can timely treat the freezing. However, the control logic is long, the control variables are few, the operation variables of the main component are many, the detection precision is poor, the overall freezing condition of the indoor unit is difficult to effectively judge, and the condition that the protection mechanism is not started due to local freezing is easy to occur.
In the prior art, the anti-freezing control is characterized in that the protection mechanism is long in logic, few in control variable, many in operation variable and poor in detection precision, the overall freezing condition of the indoor unit is difficult to effectively judge, and the condition that local freezing occurs and the protection mechanism is not started is easy to occur; secondly, the machine failure area, the failure frequency, the failure proportion of the air conditioners with the same model, the models which are easy to fail and the like have no feedback, the problem is not easy to show, and the iterative upgrade of the air conditioning technology is not facilitated.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is to provide a control method that can automatically remedy when a freeze protection decision fails or malfunctions.
In order to achieve the aim, the invention provides a control method for automatic remediation of an air conditioner after freezing, which comprises the following steps:
acquiring the inlet and outlet temperatures of a heat exchanger of the indoor unit;
according to the acquired inlet and outlet temperatures, the inlet and outlet temperatures are compared with a preset temperature to control the starting/exiting of automatic remediation, and a fault signal is recorded;
the initiating automatic remediation proceeds as follows:
stopping the operation of the press; after the indoor fan stops for a1 time, starting the indoor fan reversely at a preset rotating speed and running for a b1 time; then starting the electric heating, and forming a high-temperature field distributed over the heat exchanger of the indoor unit under the action of the heat radiation of the electric heating and the heat convection formed by the reverse airflow of the cross flow fan so as to complete the deicing treatment of the icing part;
the a1>0, the b1> 0.
Preferably, when the obtained inlet temperature and the outlet temperature are both higher than a first preset temperature, the press keeps the current state to continue to operate;
when any one of the obtained inlet temperature and the outlet temperature is lower than a first preset temperature, continuously judging whether the inlet temperature and the outlet temperature are continuously lower than the first preset temperature for n times at intervals of time t; when the inlet temperature and the outlet temperature are not continuously lower than the first preset temperature for n times, the press keeps the current state to continuously operate; when the inlet temperature or the outlet temperature is lower than a first preset temperature for n times continuously, judging that the anti-freezing protection mechanism is invalid, starting automatic remediation and recording a fault signal once; the t is greater than 0, and the n is a positive integer.
Preferably, the maximum on-time of the electrical heating is c1, the c1> 0.
Preferably, when the inlet temperature and the outlet temperature are both higher than the second preset temperature and continue for d1 time, the air conditioner exits automatic remediation; the d1> 0.
Preferably, the automatic exit remedy is performed by the following steps:
the electric heating is closed, the cross flow fan stops after continuing to operate for a time a2, then the compressor is normally started after forward starting time b2 at a preset rotating speed, and after the operation time c2 of the compressor, the cross flow fan restores to the operation mode before automatic remediation; the a2>0, the b2>0, the c2> 0.
Preferably, the real-time temperatures of the inlet and the outlet are obtained by temperature sensors arranged at the inlet and the outlet of the heat exchanger of the indoor unit.
Further, the method also comprises the step of sending a fault signal through the communication module.
The technical scheme provided by the invention can have the following beneficial effects:
the invention solves the problems that the existing anti-freezing protection mechanism has long logic, few control variables, many operation variables and poor detection precision, is difficult to effectively judge the integral freezing condition of the indoor unit, and is easy to cause local freezing and the protection mechanism is not started. The temperature sensors arranged at the inlet and the outlet of the indoor unit heat exchanger monitor the temperature of the inlet and the outlet of the indoor unit heat exchanger of the air conditioner, judge whether the anti-freezing mechanism fails or not, and after determining that the anti-freezing mechanism fails, an automatic remedy program is started to finish the deicing operation. The invention can also monitor the failure area, failure frequency, the failure proportion of the air conditioners of the same type, the type which is easy to fail and the like of the anti-freezing protection mechanism through the fault information feedback, show hidden problems and is beneficial to the iterative upgrade of the air conditioning technology. Meanwhile, the invention adopts an electric heating mode to automatically remedy, and after the device is started, the electric energy can be quickly converted into heat energy to quickly melt ice.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic flow diagram shown in accordance with an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed.
As shown in fig. 1, a control method for automatic remediation after freezing of an air conditioner comprises the following steps:
when the air conditioner operates in a refrigeration or dehumidification mode, the inlet and outlet temperatures of a heat exchanger of the indoor unit are obtained;
and according to the acquired inlet and outlet temperatures, comparing the acquired inlet and outlet temperatures with a preset temperature to control the starting/exiting of automatic remediation, and recording a feedback fault signal.
In this embodiment, the real-time temperatures at the inlet and the outlet are obtained by the temperature sensors arranged at the inlet and the outlet of the heat exchanger of the indoor unit.
Judging that the press keeps the current state to continue running when the acquired inlet temperature and the acquired outlet temperature are both higher than a first preset temperature;
when any one of the obtained inlet temperature and the outlet temperature is lower than a first preset temperature, continuously judging whether the inlet temperature and the outlet temperature are continuously lower than the first preset temperature for 3 times at intervals of 5 seconds; when the inlet temperature and the outlet temperature are not continuously lower than the first preset temperature for 3 times, the press keeps the current state and judges the inlet temperature and the outlet temperature again; and when the inlet temperature or the outlet temperature is continuously lower than the first preset temperature for 3 times, judging that the anti-freezing protection mechanism is invalid, starting automatic remediation and recording a fault signal once. In this embodiment, the first preset temperature is higher than the freezing temperature, and is used to determine whether the anti-freezing mechanism fails.
And when the inlet temperature and the outlet temperature are higher than the second preset temperature and last for 20 seconds, the air conditioner exits from the automatic remediation.
The embodiment initiates automatic remediation in the following manner:
stopping the operation of the press; and the indoor fan is stopped after continuously operating for 30 seconds, then reversely started at a preset rotating speed and operated for 1 minute, and then the electric heating is started, and under the action of heat convection formed by self heat radiation of the electric heating and reverse airflow of the cross flow fan, a high-temperature field which is distributed over the heat exchanger of the indoor unit is formed, so that the deicing treatment of the frozen part is completed. The maximum on-time of the electrical heating is 15 minutes. And automatically entering and exiting the remediation link when the longest electric heating starting time is reached.
The automatic exit remediation is performed according to the following steps:
and (3) closing the electric heating, stopping the cross-flow fan after continuously running for 3 minutes, then starting the cross-flow fan in the forward direction at a preset rotating speed and continuously running for 3 minutes, then normally starting the press, and after the press runs for 3 minutes, recovering the running mode of the cross-flow fan before the automatic remediation program. And sending a fault signal to the monitoring host through the WIFI communication module.
It should be understood that the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. The present invention is not limited to the procedures and structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (7)
1. A control method for automatic remediation after freezing of an air conditioner is characterized by comprising the following steps:
acquiring the inlet and outlet temperatures of a heat exchanger of the indoor unit;
according to the acquired inlet and outlet temperatures, the inlet and outlet temperatures are compared with a preset temperature to control the starting/exiting of automatic remediation, and a fault signal is recorded;
when any one of the obtained inlet temperature and the outlet temperature is lower than a first preset temperature, continuously judging whether the inlet temperature and the outlet temperature are continuously lower than the first preset temperature for n times at intervals of time t; when the inlet temperature or the outlet temperature is lower than a first preset temperature for n times continuously, judging that an anti-freezing protection mechanism fails, starting automatic remediation and recording a fault signal for one time, wherein n is a positive integer;
the initiating automatic remediation proceeds as follows:
stopping the operation of the press; after the indoor fan stops for a1 time, starting the indoor fan reversely at a preset rotating speed and running for a b1 time; then starting the electric heating, and forming a high-temperature field distributed over the heat exchanger of the indoor unit under the action of the self heat radiation of the electric heating and the heat convection formed by the reverse airflow of the cross flow fan;
the a1>0, the b1> 0.
2. A control method for automatic remedy after freezing of air conditioner according to claim 1, characterized by:
when the obtained inlet temperature and the outlet temperature are both higher than a first preset temperature, the press keeps the current state to continue to operate;
when the inlet temperature and the outlet temperature are not continuously lower than the first preset temperature for n times, the press keeps the current state to continuously operate; the t > 0.
3. A control method for automatic remedy after freezing of air conditioner according to claim 1 or 2, characterized by: the maximum on-time for electrical heating is c1, c1> 0.
4. A control method for automatic remedy after freezing of air conditioner according to claim 1, characterized by:
when the inlet temperature and the outlet temperature are both higher than the second preset temperature and continue for d1 time, the air conditioner exits automatic remediation; the d1> 0.
5. A control method for automatic remedy after freezing of air conditioner according to claim 1, characterized by: the automatic exit remedy is carried out according to the following steps:
the electric heating is closed, the cross flow fan stops after continuing to operate for a time a2, then the compressor is normally started after forward starting time b2 at a preset rotating speed, and after the operation time c2 of the compressor, the cross flow fan restores to the operation mode before automatic remediation; the a2>0, the b2>0, the c2> 0.
6. A control method for automatic remedy after freezing of air conditioner according to claim 1, characterized by: the real-time temperatures of the inlet and the outlet are obtained through temperature sensors arranged at the inlet and the outlet of the heat exchanger of the indoor unit.
7. A control method for automatic remedy after freezing of air conditioner according to claim 1, characterized by: further comprising the step of sending a fault signal via the communication module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811051199.5A CN109210695B (en) | 2018-09-10 | 2018-09-10 | Control method for automatic remediation after freezing of air conditioner |
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| CN201811051199.5A CN109210695B (en) | 2018-09-10 | 2018-09-10 | Control method for automatic remediation after freezing of air conditioner |
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| CN109210695A CN109210695A (en) | 2019-01-15 |
| CN109210695B true CN109210695B (en) | 2020-11-27 |
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| CN113587181B (en) * | 2021-08-03 | 2022-12-09 | 青岛海信日立空调***有限公司 | Multi-split air conditioner floor heating system |
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| JP2007170695A (en) * | 2005-12-19 | 2007-07-05 | Corona Corp | Heat pump device |
| CN105972758B (en) * | 2016-05-19 | 2019-02-12 | 合肥美的暖通设备有限公司 | Defrosting control method, defrosting control device and the air conditioner of air conditioner |
| CN106091296A (en) * | 2016-08-02 | 2016-11-09 | 珠海格力电器股份有限公司 | Quickly exit control device, air conditioning system and the control method of anti-freeze protection |
| CN107192094A (en) * | 2017-05-27 | 2017-09-22 | 宁波奥克斯电气股份有限公司 | A kind of defrosting control method of cabinet air-conditioner |
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Effective date of registration: 20201104 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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