CN110848898B - Control method for preventing air conditioner load conversion from stopping, computer readable storage medium and air conditioner - Google Patents
Control method for preventing air conditioner load conversion from stopping, computer readable storage medium and air conditioner Download PDFInfo
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- CN110848898B CN110848898B CN201910964585.1A CN201910964585A CN110848898B CN 110848898 B CN110848898 B CN 110848898B CN 201910964585 A CN201910964585 A CN 201910964585A CN 110848898 B CN110848898 B CN 110848898B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000004378 air conditioning Methods 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method for preventing air conditioner load conversion from stopping, a computer readable storage medium and an air conditioner. According to the invention, through the combined control of the frequency of the external fan and the frequency of the compressor, the heating overload protection problem caused by load conversion is solved, and the problems of poor heating effect, reduction of user experience quality and the like caused in the heating overload process are also solved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method for preventing air conditioner load conversion from stopping, a computer readable storage medium and an air conditioner.
Background
In the prior art, a multi-connected air conditioning unit comprises at least two indoor units connected in parallel, one or more outdoor units connected in parallel, and refrigerant circulation connecting pipes between the outdoor units and the indoor units. Each indoor unit comprises an indoor heat exchanger which is connected with and exchanges heat through a refrigerant circulating pipe. To the multi-connected unit of high load heating operation, the refrigerant that originally flows to the shut down indoor set can flow to the indoor set of operation fast for the coil pipe temperature of operation indoor set rises rapidly, can make the gaseous refrigerant that leads to in this coil pipe can't release heat the liquefaction, makes system pressure constantly rise, leads to air conditioning system to appear high-pressure failure easily. When some internal machines of the multi-connected unit which runs for a long time suddenly turn to a shutdown mode, the system load is increased in a short time. The problem of heating overload protection shutdown is easy to occur.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a control method for preventing the load conversion shutdown of an air conditioner, a computer readable storage medium and the air conditioner, which can be used for solving the problems that when all internal machines are in a heating mode simultaneously, the frequency of a compressor cannot be immediately reduced to a target frequency in a short time after any internal machine is shut down, the rotating speed is still the working frequency of a plurality of internal machines, and the refrigerant of the shut-down pipeline is dispersed into other pipelines, so that the pressure in the pipeline is increased sharply, the system load is increased, and the shutdown is further caused.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method for preventing air conditioner load from switching and stopping is characterized by that the working mode of indoor machine is detected and judged, if it is judged that it is heating mode, the load state of system operation is further detected and judged, and according to the load state result obtained by judgment the operation frequency of compressor and operation state of external fan are correspondingly regulated. Through the combined control of the frequency of the outer fan and the frequency of the compressor, the problem of heating overload protection brought by load conversion is solved, and the problems of poor heating effect, reduced user experience quality and the like brought by the heating overload process are solved.
Further, the working mode of the indoor unit is detected and judged, and if the working mode is not the heating mode, the current running state is maintained. Under the heating mode, the high load protection condition is easily generated during the system work, so the shutdown condition caused by the high load protection can be effectively avoided by the control method aiming at the heating mode, and the continuous and stable operation of the air conditioner is ensured.
Further, the load state of the further detection and judgment system operation specifically includes a full load state and a load conversion state. The load conditions of the air conditioning system are distinguished, and control and adjustment are further distinguished, so that the accuracy and effectiveness of adjustment are guaranteed.
Further, the full load state determination criterion is: and detecting that all the internal machines are put into operation for more than X hours, wherein X is a preset constant value. And a full-load judgment standard is set, so that whether the current air conditioner is in a full-load state or not can be accurately judged, and the misjudgment rate is reduced.
Further, the load conversion state determination criterion is as follows: and detecting that one or more internal machines enter a shutdown mode, and only keeping one internal machine with the minimum capacity to work. And the judgment standard of load conversion is set, so that whether the current air conditioner is in a load conversion state can be accurately judged, and the misjudgment rate is reduced.
Further, the adjusting the operation state of the outer fan specifically comprises: and if the indoor fan is detected to be in a low windshield, the outer fan runs at a low wind speed. The indoor fan is a low wind shield, and the outer fan can operate according to low wind speed, so that the whole system is in a dynamic balance state, and the air conditioner can stably operate.
Further, the adjusting the operation state of the outer fan specifically comprises: and if the indoor fan is detected to be not in a low windshield state, detecting the temperature of the outer pipe, the temperature of the module and the phase current, and adjusting the running state of the outer fan according to the detection result. The specific operation state of the outer fan is further judged and adjusted according to the temperature of the outer pipe, the temperature of the module and the phase current, the outer fan is adjusted more accurately, and the whole system is in a dynamic balance state.
Further, when the system is in a load conversion state, if the system needs to quit the load conversion control, the system is allowed to quit after at least t1 time, at this time, the system quits the control if the compressor reaches the target frequency, otherwise, the system needs to continue to operate for t2 time to allow the system to quit. The reason for running t1 at least is that the judgment criterion for the whole system is to avoid that the system just tends to be stable, and the control mode is switched immediately, so that the system load is increased again. Since the time t1 has been run before, the target frequency is determined not to be dropped, and the time t2 is continued to run. Since the time t1+ t2 is already running, even if the frequency does not drop to the target frequency at this time, the system load tends to be in a gentle stage, and the control can be safely exited.
A computer-readable storage medium storing a computer program that, when invoked by a processor, implements the control method for preventing an air conditioning load transition stop described in any one of the above.
An air conditioner comprising a processor and a memory for storing a computer program which, when invoked by the processor, implements the control method for preventing air conditioner load transition shutdowns of any preceding claim.
The control method for preventing the air conditioner load conversion from stopping, the computer readable storage medium and the air conditioner provided by the invention have the beneficial effects that: the combined control method of the frequency of the external fan and the frequency of the compressor are utilized to solve the problem of heat overload protection of multi-connected air-conditioner modulation, the protection can be realized without increasing the hardware cost of the air conditioner, the combined control method can be widely applied to the multi-connected air-conditioner air.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1: a control method for preventing the load conversion of air conditioner from stopping.
A control method for preventing air conditioner load conversion shutdown specifically comprises the following steps:
step one, judging whether the working mode of the indoor unit is a heating mode or not, and if the working mode is the heating mode, performing the next step;
and step two, judging whether the load state of the system operation is a full load state or not and switching the load, wherein the full load state is judged when all the internal machines are operated for one hour or more under the working condition of a severe environment (for example, 20 ℃ of an indoor environment temperature sensing bulb, 12 ℃ of an outdoor environment temperature sensing bulb and 30 ℃ of the internal machines) generally. If any internal machine exists, one or more internal machines enter a shutdown mode, and only one internal machine with the minimum capacity is kept to work, namely the internal machine is judged to be in a load conversion state.
And step three, judging the capacity code of the internal machine switched to the shutdown mode at the moment, and reducing the frequency of the compressor to run for a period of time according to the difference of the capacity codes of the internal machine (for example, when the capacity code of the internal machine is 20, the frequency of the compressor is reduced by 10HZ when one internal machine is shut down, and if the reduced frequency of the compressor is less than the lower limit value of the frequency, the compressor runs according to the lower limit value of the frequency).
And step four, judging the temperature of the outer pipe at the moment, and if the outer ring temperature is greater than T1, determining the running state of the outer fan according to the temperature of the outer pipe, the temperature of the module and the magnitude of phase current. For example: if the indoor fan is in a low wind gear, the outer fan runs at a low wind speed, and if the indoor fan is in a non-low wind gear, the temperature of the module is read, and whether the temperature of the module is higher than the limiting frequency temperature of the T module by-5 ℃ is judged. If the temperature of the T module is higher than the frequency-limited temperature of the T module by-5 ℃ and the T outer pipe is more than or equal to 12 ℃, the outer fan is stopped;
if the temperature of the T module is higher than the frequency limiting temperature of the T module by-5 ℃ and the temperature of the T outer pipe is lower than 2 ℃, the outer fan operates at a low wind speed;
if the temperature of the T module is higher than the frequency-limited temperature of the T module and lower than 5 ℃ and the temperature of the T outer pipe is more than or equal to 2 ℃ and lower than 12 ℃, the outer fan operates at a low wind speed;
if the temperature of the T module is more than or equal to the frequency limiting temperature of the T module and is minus 2 ℃, the external fan operates at a low wind speed;
if the frequency limiting temperature of the T module is more than or equal to minus 5 ℃ and less than the temperature of the T module and less than minus 2 ℃, the phase current value is more than I1, the external fan is stopped to process, and the phase current value is less than or equal to I1, the external fan maintains the original state and does not perform any control processing.
And if the temperature of the outer ring is less than or equal to T2, the outer fan operates at a high wind speed.
If the temperature of the outer ring is more than T2 and less than or equal to T1, the outer fan operates at the medium wind speed. Wherein T1 and T2 are judgment points of the outer ring temperature sensing bulb temperature, T1 is more than or equal to 18 ℃ and less than or equal to 19 ℃, and T2 is more than or equal to 4 ℃ and less than or equal to 5 ℃.
And step five, judging to quit the special control of load conversion. When entering the load conversion control, the judgment and exit are allowed at least after the time t1, and the control is exited if the frequency of the compressor is reduced to the target frequency, otherwise, the control is exited after the operation is continued for the time t 2. T1 is more than or equal to 5min and less than or equal to 10min, and t2 is more than or equal to 3min and less than or equal to 5 min.
Example 2: a control method for preventing the load conversion of air conditioner from stopping.
The difference from embodiment 1 is that, when the multi-split air conditioner is heating, the compressor is operated at a fixed frequency of 5HZ, 10HZ, or other frequencies by lowering the compressor whenever load conversion occurs.
Example 3: a control method for preventing the load conversion of air conditioner from stopping.
The difference from the embodiment 1 is that the air-conditioning multi-connected unit heating mode only needs to be operated under the condition of closing the indoor unit, and the outer fan is operated at a low wind speed, so that the condition of high-load shutdown can be effectively prevented.
Example 4: a computer readable storage medium.
A computer-readable storage medium for storing a computer program that, when invoked by a processor, implements the control method for preventing an air conditioning load transition stoppage of any one of embodiments 1-3.
Example 5: an air conditioner.
An air conditioner comprising a processor and a memory for storing a computer program for implementing the control method for preventing a load changeover stop of the air conditioner of any one of embodiments 1 to 3 when the computer program is called by the processor.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (6)
1. A control method for preventing air conditioner load conversion from stopping is characterized in that the working mode of an indoor unit is detected and judged, if the working mode is judged to be a heating mode, the load state of system operation is further detected and judged, and the operation frequency of a compressor and the operation state of an external fan are correspondingly adjusted according to the load state result obtained by judgment;
the working mode of the indoor unit is detected and judged, and if the working mode is not the heating mode, the current running state is maintained;
the load state of the further detection and judgment system operation specifically comprises a full load state and a load conversion state;
the full load state judgment standard is as follows: detecting that all internal machines are put into operation for more than X hours, wherein X is a preset constant value;
the load conversion state judgment standard is as follows: and detecting that one or more internal machines enter a shutdown mode, and only keeping one internal machine with the minimum capacity to work.
2. The control method for preventing an air conditioning load changeover stop according to claim 1, characterized in that: the adjustment of the running state of the outer fan is specifically as follows: and if the indoor fan is detected to be in a low windshield, the outer fan runs at a low wind speed.
3. The control method for preventing an air conditioning load changeover stop according to claim 1, characterized in that: the adjustment of the running state of the outer fan is specifically as follows: and if the indoor fan is detected to be not in a low windshield state, detecting the temperature of the outer pipe, the temperature of the module and the phase current, and adjusting the running state of the outer fan according to the detection result.
4. The control method for preventing an air conditioning load changeover stop according to claim 1, characterized in that: when the system is in a load conversion state, if the load conversion control needs to be quitted, the judgment and the quitting are allowed at least after the time of t1 operation, at the moment, the control is quitted if the compressor operation reaches the target frequency, otherwise, the quitting is allowed only after the time of t2 operation is continued.
5. A computer-readable storage medium storing a computer program, characterized in that: the computer program, when invoked by a processor, implements the control method for preventing an air conditioning load transition shutdown of any of claims 1-4.
6. An air conditioner comprising a processor and a memory for storing a computer program, characterized in that: the computer program, when invoked by the processor, implements the control method for preventing an air conditioning load transition shutdown of any of claims 1-4.
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| CN111780362B (en) * | 2020-07-03 | 2022-03-11 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
| CN114738832B (en) * | 2022-03-22 | 2024-06-07 | 青岛海尔空调电子有限公司 | Direct expansion type air conditioning system and control method thereof |
| CN115789877A (en) * | 2022-11-29 | 2023-03-14 | 青岛海尔空调器有限总公司 | Air-conditioning thermal overload control method, device, equipment and storage medium |
| CN115751606B (en) * | 2022-11-30 | 2024-07-26 | 宁波奥克斯电气股份有限公司 | Control method and control device for entropy detection of air conditioner outdoor unit |
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