CN114543328A - Method and device for controlling air conditioner, air conditioner and storage medium - Google Patents
Method and device for controlling air conditioner, air conditioner and storage medium Download PDFInfo
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- CN114543328A CN114543328A CN202210047882.1A CN202210047882A CN114543328A CN 114543328 A CN114543328 A CN 114543328A CN 202210047882 A CN202210047882 A CN 202210047882A CN 114543328 A CN114543328 A CN 114543328A
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000009467 reduction Effects 0.000 claims description 7
- 230000001960 triggered effect Effects 0.000 abstract description 27
- 230000001276 controlling effect Effects 0.000 description 44
- 238000010586 diagram Methods 0.000 description 11
- 230000000875 corresponding effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient 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
- F24F11/70—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
- 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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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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- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of intelligent household appliances, and discloses a method for controlling an air conditioner, which comprises the following steps: controlling the running frequency of the compressor to be reduced under the condition of triggering the overcurrent protection; determining a target opening degree of the expansion valve; and controlling the opening degree of the expansion valve to increase to the target opening degree, and locking the opening degree. According to the air conditioner and the control method, under the condition that overcurrent protection is triggered, the compressor is controlled to reduce the frequency, and the air conditioner can be ensured to normally and reliably run. Meanwhile, the opening degree of the expansion valve is controlled to be increased and locked, so that the condition that the exhaust temperature is increased instead due to the fact that the opening degree of the expansion valve changes along with the frequency of the compressor can be avoided. Therefore, secondary protection of exhaust temperature triggered after overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the stability of the operation of the air conditioner is improved. The application also discloses a device for controlling the air conditioner, the air conditioner and a storage medium.
Description
Technical Field
The present application relates to the field of intelligent home appliance technologies, and for example, to a method and an apparatus for controlling an air conditioner, and a storage medium.
Background
At present, in order to ensure that the air conditioning unit can normally and reliably operate, a plurality of protective measures need to be added to the air conditioning system. Particularly, when the air conditioner starts cooling in a high-temperature environment, an overcurrent protection mechanism is likely to be triggered due to a high-load working condition or poor heat dissipation of the outdoor unit. For the overcurrent protection of the air conditioning system, the prior art limits the direct current frequency conversion compressor to operate at the rated frequency of 60 Hz.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the operation process of the air conditioner, when the operation frequency of the compressor changes, the demand of the refrigerant also changes, and at the moment, the opening degree of the electronic expansion valve needs to be adjusted to change the refrigerant quantity of the system to adapt to the frequency change of the compressor. However, the operation frequency of the compressor under the overcurrent protection is reduced at the speed of 1Hz/s, and the opening of the expansion valve is reduced at the speed of 83.3 pulses/s, so that the frequency of the compressor is not reduced in place due to improper variation of the two, but the actual opening of the expansion valve is very small. And because the exhaust temperature has reaction delay, in this case, the reduction of the frequency of the compressor and the opening degree of the expansion valve can cause the exhaust temperature to rise, and further the control of the secondary protection of the exhaust temperature can be triggered, so that the frequency of the compressor has to be reduced again or even stopped finally.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for controlling an air conditioner, the air conditioner and a storage medium, which can prevent secondary protection of exhaust temperature from being triggered after overcurrent protection, and are beneficial to improving the running stability of the air conditioner.
In some embodiments, the method comprises:
controlling the running frequency of the compressor to be reduced under the condition of triggering the overcurrent protection;
determining a target opening degree of the expansion valve;
and controlling the opening degree of the expansion valve to increase to the target opening degree, and locking the opening degree.
In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to, when executing the program instructions, perform the method for controlling an air conditioner described above.
In some embodiments, the air conditioner includes the above-described apparatus for controlling an air conditioner.
In some embodiments, the storage medium stores program instructions that, when executed, perform the method for controlling an air conditioner as described above.
The method and the device for controlling the air conditioner, the air conditioner and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
according to the embodiment of the disclosure, under the condition that overcurrent protection is triggered, the compressor is controlled to reduce the frequency, so that the air conditioner can be ensured to normally and reliably run. Meanwhile, the opening degree of the expansion valve is controlled to be increased and locked, so that the condition that the exhaust temperature is increased on the contrary due to the fact that the opening degree of the expansion valve changes along with the frequency of the compressor can be avoided. Therefore, secondary protection of exhaust temperature triggered after overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the stability of the operation of the air conditioner is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic diagram of a method for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of another method for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of another method for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of another method for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of another method for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an apparatus for controlling an air conditioner according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponding to B refers to an association or binding relationship between a and B.
At present, in order to ensure that the air conditioning unit can normally and reliably operate, a plurality of protective measures need to be added to the air conditioning system. Particularly, when the air conditioner starts cooling in a high-temperature environment, an overcurrent protection mechanism is likely to be triggered due to a high-load working condition or poor heat dissipation of the outdoor unit. For the overcurrent protection of the air conditioning system, the prior art limits the direct current frequency conversion compressor to operate at the rated frequency of 60 Hz. In the operation process of the air conditioner, when the operation frequency of the compressor changes, the demand of the refrigerant also changes, and at the moment, the opening degree of the electronic expansion valve needs to be adjusted to change the refrigerant quantity of the system to adapt to the frequency change of the compressor. However, the operation frequency of the compressor under the overcurrent protection is reduced at the speed of 1Hz/s, and the opening of the expansion valve is reduced at the speed of 83.3 pulses/s, so that the frequency of the compressor is not reduced in place due to improper variation of the two, but the actual opening of the expansion valve is very small. And because the exhaust temperature has reaction delay, in this case, the reduction of the frequency of the compressor and the opening degree of the expansion valve can cause the exhaust temperature to rise, and further the control of the secondary protection of the exhaust temperature can be triggered, so that the frequency of the compressor has to be reduced again or even stopped finally.
As shown in fig. 1, an embodiment of the present disclosure provides a method for controlling an air conditioner, including:
and S101, controlling the running frequency of the compressor to be reduced by the air conditioner under the condition of triggering the overcurrent protection.
S102, the air conditioner determines the target opening degree of the expansion valve.
And S103, controlling the opening degree of the expansion valve to be increased to a target opening degree by the air conditioner, and locking the opening degree.
By adopting the method for controlling the air conditioner provided by the embodiment of the disclosure, the air conditioner can be ensured to normally and reliably run by controlling the compressor to reduce the frequency under the condition of triggering the overcurrent protection. Meanwhile, the opening degree of the expansion valve is controlled to be increased and locked, so that the condition that the exhaust temperature is increased instead due to the fact that the opening degree of the expansion valve changes along with the frequency of the compressor can be avoided. Therefore, secondary protection of exhaust temperature triggered after overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the stability of the operation of the air conditioner is improved.
Alternatively, the air conditioner determining the target opening degree of the expansion valve includes: the air conditioner determines the current opening K0; the air conditioner calculates X ═ a × Kmax/K0, and obtains a compensation opening X; the air conditioner calculates K1 to K0+ X, and obtains a target opening K1. Where a is a compensation coefficient and Kmax is the maximum opening degree of the expansion valve. In this way, the embodiment of the present disclosure can obtain a compensation value for an increase in the opening degree of the expansion valve based on the ratio of the maximum opening degree to the current opening degree thereof. Therefore, the expansion valve can be controlled to have larger amplification when the current opening degree is smaller, and the expansion valve can be controlled to have smaller amplification when the current opening degree is smaller, so that the opening degree of the expansion valve can be reasonably increased.
Optionally, the compensation coefficient a has a value range of [10, 50 ]. The compensation coefficient a can be selected according to specific working conditions. Specifically, the value of the compensation coefficient a may be 10, 15 or 20.
Optionally, the value range of the target opening K1 is [ K0, Kmax ]. And when the calculated K1 is greater than Kmax, Kmax is taken as the target opening degree. In this way, the disclosed embodiment can define the range of the amount of change of the opening degree of the expansion valve, thereby more reasonably controlling the increase of the opening degree of the expansion valve.
Alternatively, the maximum opening degree Kmax may be determined according to the type of the expansion valve structure. Specifically, the maximum opening degree Kmax may be 480pulse, 500pulse, or 2000 pulse.
Alternatively, the processor controlling the opening degree of the expansion valve to increase to the target opening degree comprises: the processor determines an opening increase rate according to the exhaust temperature; the processor increases the opening degree of the expansion valve to a target opening degree in accordance with the opening degree increase rate. In this way, the embodiment of the present disclosure can detect the exhaust temperature and control the rate of increase of the opening degree of the expansion valve in accordance therewith. By dredging the expansion valve in time, the exhaust temperature can be prevented from rising in a short time. Therefore, the secondary protection of the exhaust temperature can be prevented from being triggered immediately after the overcurrent protection, so that the compressor is subjected to frequency reduction again and even is stopped, and the stability of the operation of the air conditioner is improved.
Alternatively, the exhaust gas temperature is in a positive correlation with the opening degree increase rate. That is, the larger the exhaust gas temperature, the larger the opening degree increase rate of the expansion valve. Thus, when the exhaust temperature is high and the exhaust temperature protection point is about to be reached, the exhaust temperature can be prevented from further rising in time by rapidly increasing the opening degree of the expansion valve. Therefore, the secondary protection of the exhaust temperature can be effectively prevented from being triggered immediately after the overcurrent protection, so that the compressor is reduced in frequency again and even stopped, and the stability of the operation of the air conditioner is improved.
Optionally, the determining that the overcurrent protection is triggered by the air conditioner includes: the air conditioner continuously obtains working current; and under the condition that the working current is greater than or equal to the preset current threshold, the air conditioner judges that the overcurrent protection is triggered. Therefore, the air conditioner can judge whether to trigger the over-current protection by continuously detecting the working current, so that corresponding control can be timely executed to protect the air conditioner when the over-current protection is triggered.
Optionally, the air conditioner controlling the compressor operation frequency to be decreased includes: the air conditioner determines a frequency reduction rate according to the exhaust temperature; the air conditioner reduces the operating frequency of the compressor to the target frequency at the frequency reduction rate. In this way, the disclosed embodiments are able to detect the discharge temperature and thereby control the rate of decrease of the compressor operating frequency. Through in time reducing the frequency of the compressor, the damage to the air conditioner set caused by overcurrent can be avoided, and the service life of the compressor can be prolonged. Meanwhile, the exhaust temperature can be reduced, and secondary protection of the exhaust temperature is prevented from being triggered immediately after overcurrent protection, so that the stability of the operation of the air conditioner is improved.
Alternatively, the exhaust temperature is positively correlated with the rate of frequency decrease. That is, the greater the discharge temperature, the greater the rate of frequency reduction of the compressor. Thus, when the exhaust temperature is higher and is about to reach the exhaust temperature protection point, the exhaust temperature can be prevented from further rising in time by quickly reducing the frequency of the compressor. Therefore, secondary protection of the exhaust temperature can be effectively prevented from being triggered immediately after overcurrent protection, and the stability of the operation of the air conditioner is improved.
Referring to fig. 2, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:
s201, under the condition that overcurrent protection is triggered, the air conditioner controls the running frequency of the compressor to be reduced.
S202, the air conditioner determines a target opening degree of the expansion valve.
And S203, the air conditioner controls the opening degree of the expansion valve to be increased to a target opening degree and locks the opening degree.
And S204, judging whether a preset unlocking condition is met by the air conditioner.
And S205, under the condition that the preset unlocking condition is met, the air conditioner releases the locking of the opening degree of the expansion valve.
And S206, under the condition that the preset unlocking condition is met, the air conditioner keeps locking the opening degree of the expansion valve.
By adopting the method for controlling the air conditioner provided by the embodiment of the disclosure, the air conditioner can be ensured to normally and reliably run by controlling the compressor to reduce the frequency under the condition of triggering the overcurrent protection. And meanwhile, the opening of the expansion valve is controlled to be increased and locked, and the locking of the opening of the expansion valve is released only when corresponding unlocking conditions are met. Therefore, the embodiment of the disclosure can avoid the situation that the opening degree of the expansion valve is changed along with the frequency of the compressor, so that the exhaust temperature is increased on the contrary. Therefore, secondary protection of exhaust temperature triggered after overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the stability of the operation of the air conditioner is improved.
Optionally, the preset unlocking condition includes: and (4) restoring the overcurrent protection or enabling the indoor unit to enter PID control. Thus, when the unlock condition is satisfied, the air conditioner unlocks the opening degree of the expansion valve. At the moment, the opening degree of the expansion valve cannot cause the exhaust temperature to rise along with the frequency change of the compressor so as to trigger the exhaust temperature protection. Therefore, the normal refrigeration operation of the air conditioner can be ensured to the maximum extent while the exhaust temperature protection shutdown of the compressor is avoided.
Referring to fig. 3, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:
and S301, under the condition that the overcurrent protection is triggered, the air conditioner controls the running frequency of the compressor to be reduced.
S302, the air conditioner determines a target opening degree of the expansion valve.
And S303, controlling the opening degree of the expansion valve to be increased to the target opening degree by the air conditioner, and locking the opening degree.
S304, the air conditioner continuously detects the exhaust temperature of the compressor.
And S305, controlling the opening degree of the expansion valve to be increased to the maximum opening degree and locking the opening degree when the exhaust temperature is greater than or equal to the first preset temperature by the air conditioner.
By adopting the method for controlling the air conditioner provided by the embodiment of the disclosure, the air conditioner can be ensured to normally and reliably run by controlling the compressor to reduce the frequency under the condition of triggering the overcurrent protection. Meanwhile, the opening degree of the expansion valve is controlled to be increased and locked, so that the condition that the exhaust temperature is increased on the contrary due to the fact that the opening degree of the expansion valve changes along with the frequency of the compressor can be avoided. And meanwhile, the exhaust temperature of the compressor is continuously detected, and when the exhaust temperature exceeds a first preset temperature, the opening degree of the expansion valve is adjusted to be maximum in time so as to reduce the exhaust temperature as much as possible. Therefore, secondary protection of exhaust temperature triggered after overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the stability of the operation of the air conditioner is improved.
Optionally, the first preset temperature is less than the exhaust temperature protection point. Preferably, the first preset temperature may be set to 96 ℃. It may be set to any other value such as 95 ℃ or 97 ℃. Thus, the embodiment of the disclosure can reduce the exhaust temperature as much as possible by adjusting the opening degree of the expansion valve to the maximum before triggering the exhaust temperature protection, thereby avoiding triggering the exhaust temperature secondary protection to cause the compressor to reduce the frequency again and even stop the compressor.
Specifically, the exhaust temperature protection point is a specific temperature value at which the air conditioner triggers exhaust temperature protection. Preferably, in some embodiments, the exhaust temperature protection point is set to 98 ℃.
Referring to fig. 4, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:
s401, under the condition that overcurrent protection is triggered, the air conditioner controls the running frequency of the compressor to be reduced.
S402, the air conditioner determines the target opening degree of the expansion valve.
And S403, the air conditioner controls the opening degree of the expansion valve to be increased to the target opening degree and locks the opening degree.
S404, the air conditioner continuously detects the exhaust temperature of the compressor.
And S405, controlling the opening degree of the expansion valve to be increased to the maximum opening degree and locking the opening degree when the exhaust temperature is greater than or equal to a first preset temperature.
And S406, under the condition that the exhaust temperature is greater than or equal to a second preset temperature, the air conditioner controls the compressor to be closed, and the compressor is restarted after the preset shutdown time duration.
Wherein the second preset temperature is greater than the first preset temperature.
By adopting the method for controlling the air conditioner, the air conditioner can be ensured to normally and reliably run by controlling the compressor to reduce the frequency under the condition of triggering the overcurrent protection. Meanwhile, the opening degree of the expansion valve is controlled to be increased and locked, so that the condition that the exhaust temperature is increased instead due to the fact that the opening degree of the expansion valve changes along with the frequency of the compressor can be avoided. Therefore, secondary protection of exhaust temperature triggered after overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the stability of the operation of the air conditioner is improved. And simultaneously, the exhaust temperature of the compressor is continuously detected subsequently, and when the exhaust temperature protection is triggered and exceeds a second preset temperature, the compressor is timely shut down. So as to avoid the damage of the compressor caused by overhigh exhaust temperature, thereby being beneficial to prolonging the service life of the compressor.
Optionally, the second preset temperature is greater than the exhaust temperature guard point. Preferably, the first preset temperature may be set to 105 ℃. And may be set to any other value such as 104 c or 106 c. Therefore, the embodiment of the disclosure can shut down the compressor in time when the exhaust temperature is detected to be very high after the exhaust temperature protection is triggered, so as to reduce the damage to the compressor as much as possible, thereby being beneficial to prolonging the service life of the compressor.
Specifically, the exhaust temperature protection point is a specific temperature value at which the air conditioner triggers exhaust temperature protection. Preferably, in some embodiments, the exhaust temperature protection point is set to 98 ℃.
Optionally, the preset shutdown time can be adjusted according to specific working conditions. Preferably, the preset shutdown time period may be set to 5 min. Other arbitrary values such as 4min or 6min may be set. In this way, embodiments of the present disclosure can keep the compressor off when necessary so that higher discharge temperatures can be quickly reduced, thereby reducing damage to the compressor.
Referring to fig. 5, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:
and S501, under the condition that the overcurrent protection is triggered, the air conditioner controls the running frequency of the compressor to be reduced.
S502, the air conditioner determines the target opening degree of the expansion valve.
And S503, the air conditioner controls the opening degree of the expansion valve to be increased to the target opening degree and locks the opening degree.
S504, the air conditioner continuously detects the exhaust temperature of the compressor.
And S505, controlling the running frequency of the compressor to increase by the air conditioner under the condition that the exhaust temperature is less than or equal to a third preset temperature.
By adopting the method for controlling the air conditioner provided by the embodiment of the disclosure, the air conditioner can be ensured to normally and reliably run by controlling the compressor to reduce the frequency under the condition of triggering the overcurrent protection. Meanwhile, the opening degree of the expansion valve is controlled to be increased and locked, so that the condition that the exhaust temperature is increased instead due to the fact that the opening degree of the expansion valve changes along with the frequency of the compressor can be avoided. Therefore, secondary protection of exhaust temperature triggered after overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the stability of the operation of the air conditioner is improved. And meanwhile, the exhaust temperature of the compressor is continuously detected subsequently, and when the exhaust temperature is lower than a third preset temperature, the running frequency of the compressor is properly increased. Under the premise that the air conditioner cannot trigger the protection of the exhaust temperature, the refrigeration effect of the air conditioner can be further improved, and the user experience is improved.
Optionally, the third preset temperature is less than the first preset temperature. Preferably, the first preset temperature may be set to 90 ℃. And may be set to any other value such as 91 ℃ or 92 ℃. Thus, the embodiment of the disclosure can properly increase the operating frequency of the compressor under the condition that the exhaust temperature is lower. Under the premise that the air conditioner cannot trigger the protection of the exhaust temperature, the refrigeration effect of the air conditioner can be further improved, and the user experience is improved.
As shown in fig. 6, an embodiment of the present disclosure provides an apparatus for controlling an air conditioner, which includes a processor (processor)601 and a memory (memory) 602. Optionally, the apparatus may also include a Communication Interface 603 and bus 604. The processor 601, the communication interface 603, and the memory 602 may communicate with each other via the bus 604. Communication interface 603 may be used for information transfer. The processor 601 may call logic instructions in the memory 602 to perform the method for controlling the air conditioner of the above-described embodiment.
Furthermore, the logic instructions in the memory 602 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 602 is a computer-readable storage medium and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 601 executes functional applications and data processing by executing program instructions/modules stored in the memory 602, that is, implements the method for controlling the air conditioner in the above-described embodiments.
The memory 602 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 602 may include high speed random access memory and may also include non-volatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the device for controlling the air conditioner.
The disclosed embodiments provide a storage medium storing computer-executable instructions that, when executed, perform the above-described method for controlling an air conditioner.
The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and the drawings sufficiently illustrate embodiments of the disclosure 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. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
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 embodiments of the present disclosure. 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). 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. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for controlling an air conditioner, comprising:
controlling the running frequency of the compressor to be reduced under the condition of triggering over-current protection;
determining a target opening degree of the expansion valve;
and controlling the opening degree of the expansion valve to increase to the target opening degree, and locking the opening degree.
2. The method of claim 1, wherein determining the target opening degree of the expansion valve comprises:
determining a current opening K0;
calculating X as a Kmax/K0 to obtain a compensation opening X;
calculating K1-K0 + X to obtain a target opening K1;
where a is a compensation coefficient and Kmax is the maximum opening degree of the expansion valve.
3. The method of claim 1, wherein controlling the opening degree of the expansion valve to increase to the target opening degree comprises:
determining an opening degree increase rate according to the exhaust temperature;
and increasing the opening degree of the expansion valve to a target opening degree according to the opening degree increase rate.
4. The method of claim 1, wherein triggering overcurrent protection comprises:
continuously acquiring working current;
and judging to trigger the overcurrent protection under the condition that the working current is greater than or equal to the preset current threshold.
5. The method of claim 1, wherein the controlling the compressor operating frequency to decrease comprises:
determining a rate of frequency decrease based on the exhaust temperature;
reducing the operating frequency of the compressor to the target frequency at the frequency reduction rate.
6. The method according to any one of claims 1 to 5, wherein after controlling the opening degree of the expansion valve to increase to the target opening degree and locking the opening degree, further comprising:
judging whether a preset unlocking condition is met;
and releasing the locking of the opening degree of the expansion valve under the condition that a preset unlocking condition is met.
7. The method according to any one of claims 1 to 5, wherein after controlling the opening degree of the expansion valve to increase to the target opening degree and locking the opening degree, further comprising:
continuously detecting the exhaust temperature of the compressor;
and controlling the opening degree of the expansion valve to be increased to the maximum opening degree and locking the opening degree when the exhaust temperature is greater than or equal to a first preset temperature.
8. An apparatus for controlling an air conditioner comprising a processor and a memory storing program instructions, characterized in that the processor is configured to perform the method for controlling an air conditioner according to any one of claims 1 to 7 when executing the program instructions.
9. An air conditioner characterized by comprising the apparatus for controlling an air conditioner according to claim 8.
10. A storage medium storing program instructions, characterized in that the program instructions, when executed, perform a method for controlling an air conditioner according to any one of claims 1 to 7.
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| CN202210047882.1A CN114543328B (en) | 2022-01-17 | 2022-01-17 | Method and device for controlling air conditioner, air conditioner and storage medium |
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| CN202210047882.1A CN114543328B (en) | 2022-01-17 | 2022-01-17 | Method and device for controlling air conditioner, air conditioner and storage medium |
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