CN114543328B - 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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- CN114543328B CN114543328B CN202210047882.1A CN202210047882A CN114543328B CN 114543328 B CN114543328 B CN 114543328B CN 202210047882 A CN202210047882 A CN 202210047882A CN 114543328 B CN114543328 B CN 114543328B
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000001960 triggered effect Effects 0.000 claims abstract description 21
- 230000009467 reduction Effects 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 abstract description 12
- 230000001276 controlling effect Effects 0.000 description 43
- 238000010586 diagram Methods 0.000 description 10
- 230000000875 corresponding effect Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 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
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
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 compressor to operate at a reduced frequency under the triggering of the over-current protection; determining a target opening degree of an expansion valve; the opening degree of the expansion valve is controlled to be increased to a target opening degree, and the opening degree is locked. Under the condition of triggering over-current protection, the application can ensure the normal and reliable operation of the air conditioner by controlling the frequency reduction of the compressor. Meanwhile, the opening 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 of the expansion valve follows the frequency change of the compressor can be avoided. Therefore, the secondary protection of the exhaust temperature triggered after the overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the operation stability 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 application relates to the technical field of intelligent household appliances, in particular to a method and a device for controlling an air conditioner, the air conditioner and a storage medium.
Background
Currently, in order to ensure that an air conditioning unit can operate normally and reliably, many protection measures are required to be added to an air conditioning system. Particularly, when the air conditioner is started in a refrigerating mode under 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 an outdoor unit. For over-current protection of air conditioning systems, the prior art has limited the dc variable frequency compressor to continue to operate at a nominal 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 running process of the air conditioner, when the running frequency of the compressor is changed, the demand quantity of the refrigerant is also changed, and at the moment, the opening degree of the electronic expansion valve is required to be adjusted to change the refrigerant quantity of the system so as to adapt to the frequency change of the compressor. However, the operating frequency of the compressor is reduced at a speed of 1Hz/s under the protection of the overcurrent, the opening of the expansion valve is reduced at a speed of 83.3 pulses/s, and the inadaptation of the two causes that the frequency of the compressor is not reduced to be in place, but the actual opening of the expansion valve is small. In addition, as the exhaust temperature has reaction postponement, in this case, the decrease of the compressor frequency and the opening of the expansion valve can lead to the increase of the exhaust temperature, and further the control of secondary protection of the exhaust temperature can be triggered, so that the compressor frequency has to be decreased again and 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, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
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 triggering of secondary protection of exhaust temperature after overcurrent protection and are beneficial to improving the operation stability of the air conditioner.
In some embodiments, the method comprises:
controlling the compressor to operate at a reduced frequency under the triggering of the over-current protection;
determining a target opening degree of an expansion valve;
the opening degree of the expansion valve is controlled to be increased to a target opening degree, and the opening degree is locked.
In some embodiments, the apparatus includes a processor and a memory storing program instructions configured to perform the above-described method for controlling an air conditioner when the program instructions are executed.
In some embodiments, the air conditioner comprises the device for controlling the air conditioner.
In some embodiments, the storage medium stores program instructions that, when executed, perform the method for controlling an air conditioner 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 of triggering over-current protection, the normal and reliable operation of the air conditioner can be ensured by controlling the frequency reduction of the compressor. Meanwhile, the opening 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 of the expansion valve follows the frequency change of the compressor can be avoided. Therefore, the secondary protection of the exhaust temperature triggered after the overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the operation stability 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 and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;
fig. 6 is a schematic view 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 techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. 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 still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Currently, in order to ensure that an air conditioning unit can operate normally and reliably, many protection measures are required to be added to an air conditioning system. Particularly, when the air conditioner is started in a refrigerating mode under 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 an outdoor unit. For over-current protection of air conditioning systems, the prior art has limited the dc variable frequency compressor to continue to operate at a nominal frequency of 60 Hz. In the running process of the air conditioner, when the running frequency of the compressor is changed, the demand quantity of the refrigerant is also changed, and at the moment, the opening degree of the electronic expansion valve is required to be adjusted to change the refrigerant quantity of the system so as to adapt to the frequency change of the compressor. However, the operating frequency of the compressor is reduced at a speed of 1Hz/s under the protection of the overcurrent, the opening of the expansion valve is reduced at a speed of 83.3 pulses/s, and the inadaptation of the two causes that the frequency of the compressor is not reduced to be in place, but the actual opening of the expansion valve is small. In addition, as the exhaust temperature has reaction postponement, in this case, the decrease of the compressor frequency and the opening of the expansion valve can lead to the increase of the exhaust temperature, and further the control of secondary protection of the exhaust temperature can be triggered, so that the compressor frequency has to be decreased again and even stopped finally.
As shown in conjunction with fig. 1, an embodiment of the present disclosure provides a method for controlling an air conditioner, including:
s101, controlling the operation frequency of the compressor to be reduced by the air conditioner under the condition of triggering over-current protection.
S102, the air conditioner determines a target opening degree of the expansion valve.
S103, the air conditioner controls the opening degree of the expansion valve to increase to the target opening degree, and locks the opening degree.
By adopting the method for controlling the air conditioner, which is provided by the embodiment of the application, under the condition of triggering over-current protection, the normal and reliable operation of the air conditioner can be ensured by controlling the frequency reduction of the compressor. Meanwhile, the opening 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 of the expansion valve follows the frequency change of the compressor can be avoided. Therefore, the secondary protection of the exhaust temperature triggered after the overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the operation stability of the air conditioner is improved.
Optionally, the determining, by the air conditioner, 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 to obtain a compensation opening X; the air conditioner calculates k1=k0+x, obtaining a target opening K1. Where a is a compensation coefficient and Kmax is the maximum opening of the expansion valve. In this way, the embodiment of the present disclosure can obtain the compensation value for the increase in the opening amount of the expansion valve based on the ratio of the maximum opening amount to the current opening amount thereof. Therefore, the expansion valve can be controlled to have larger amplitude when the current opening degree is smaller, and the expansion valve can be controlled to have smaller amplitude when the current opening degree is smaller, so that the reasonable increase of the opening degree of the expansion valve is facilitated.
Optionally, the compensation coefficient a has a value in the range of [10, 50]. The compensation coefficient a can be selected according to specific working conditions. Specifically, the compensation coefficient a may take on a value of 10, 15 or 20.
Alternatively, the target opening K1 may have a value in the range of [ K0, kmax ]. And when the calculated K1 is greater than Kmax, kmax is taken as the target opening degree. In this way, the embodiment of the present disclosure can define the change amount range of the expansion valve opening, thereby more reasonably controlling the opening increase of the expansion valve.
Alternatively, the maximum opening Kmax may be determined according to the expansion valve structural model. Specifically, the maximum opening Kmax may be 480pulse, 500pulse, or 2000pulse.
Optionally, the processor controlling the opening degree of the expansion valve to increase to the target opening degree includes: 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. Thus, the embodiment of the disclosure can detect the exhaust temperature and control the increase rate of the expansion valve opening. 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, and the compressor is reduced in frequency again or even stopped, so that the operation stability of the air conditioner is improved.
Alternatively, the exhaust gas temperature is in positive correlation with the opening degree increase rate. That is, the greater the exhaust temperature, the greater the opening rate increase of the expansion valve. Thus, when the exhaust temperature is higher and the exhaust temperature protection point is about to be reached, further increase of the exhaust temperature can be timely avoided by rapidly increasing the opening of the expansion valve. Therefore, the secondary protection of the exhaust temperature can be effectively prevented from being triggered immediately after the overcurrent protection, and the compressor is reduced in frequency again or even stopped, so that the operation stability of the air conditioner is improved.
Optionally, the air conditioner judging triggering the overcurrent protection includes: the air conditioner continuously acquires working current; and under the condition that the working current is greater than or equal to a preset current threshold value, the air conditioner judges that the overcurrent protection is triggered. In this way, 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 to reduce the operating frequency 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. As such, embodiments of the present disclosure are capable of detecting the discharge temperature and thereby controlling the rate of decrease of the compressor operating frequency. Through in time limiting frequency to the compressor down-conversion, can avoid the overcurrent to cause the damage to the air conditioner unit, be favorable to improving the life of compressor. Meanwhile, the exhaust temperature can be reduced, and the secondary protection of the exhaust temperature can be prevented from being triggered immediately after the overcurrent protection, so that the operation stability of the air conditioner can be improved.
Alternatively, the exhaust temperature is positively correlated with the rate of frequency reduction. 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 the exhaust temperature protection point is about to be reached, the further increase of the exhaust temperature can be timely avoided by rapidly reducing the frequency of the compressor. Therefore, the secondary protection of the exhaust temperature can be effectively prevented from being triggered immediately after the overcurrent protection, and the operation stability of the air conditioner is improved.
As shown in connection with fig. 2, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:
s201, in case of triggering the overcurrent protection, the air conditioner controls the compressor to operate at a reduced frequency.
S202, the air conditioner determines a target opening degree of an expansion valve.
S203, the air conditioner controls the opening degree of the expansion valve to increase to the target opening degree, and locks the opening degree.
S204, the air conditioner judges whether a preset unlocking condition is met.
S205, in the case that the preset unlocking condition is satisfied, the air conditioner releases the lock of the expansion valve opening.
S206, when 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, which is provided by the embodiment of the application, under the condition of triggering over-current protection, the normal and reliable operation of the air conditioner can be ensured by controlling the frequency reduction of the compressor. And simultaneously controlling the opening of the expansion valve to be increased and locked, and unlocking the opening of the expansion valve only when the corresponding unlocking condition is met. The embodiment of the disclosure can avoid the condition that the exhaust temperature is raised instead due to the fact that the opening degree of the expansion valve follows the frequency change of the compressor. Therefore, the secondary protection of the exhaust temperature triggered after the overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the operation stability of the air conditioner is improved.
Optionally, the preset unlocking condition includes: overcurrent protection resumes or the indoor set gets into PID control. Thus, when the above unlocking condition is satisfied, the air conditioner releases the lock of the expansion valve opening. At the moment, the opening of the expansion valve is changed along with the frequency of the compressor, so that the exhaust temperature is not increased, and the exhaust temperature protection is triggered. Therefore, the normal refrigeration operation of the air conditioner can be ensured to the greatest extent while the protection and the stop of the exhaust temperature of the compressor are avoided.
As shown in connection with fig. 3, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:
s301, controlling the operation frequency of the compressor to be reduced by the air conditioner under the condition that the overcurrent protection is triggered.
S302, the air conditioner determines a target opening degree of the expansion valve.
S303, the air conditioner controls the opening degree of the expansion valve to increase to the target opening degree, and locks the opening degree.
S304, the air conditioner continuously detects the exhaust temperature of the compressor.
S305, in the case where the exhaust temperature is greater than or equal to the first preset temperature, the air conditioner controls the opening degree of the expansion valve to increase to the maximum opening degree, and locks the opening degree.
By adopting the method for controlling the air conditioner, which is provided by the embodiment of the application, under the condition of triggering over-current protection, the normal and reliable operation of the air conditioner can be ensured by controlling the frequency reduction of the compressor. Meanwhile, the opening 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 of the expansion valve follows the frequency change of the compressor can be avoided. And simultaneously, continuously detecting the exhaust temperature of the compressor, and when the exhaust temperature exceeds a first preset temperature, timely adjusting the opening of the expansion valve to the maximum so as to reduce the exhaust temperature as much as possible. Therefore, the secondary protection of the exhaust temperature triggered after the overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the operation stability 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 ℃. Any other value such as 95℃or 97℃may be used. In this way, the embodiment of the disclosure can reduce the exhaust temperature as much as possible by adjusting the opening of the expansion valve to the maximum before triggering the exhaust temperature protection, thereby avoiding triggering the exhaust temperature secondary protection and causing the compressor to be down-converted again or even shut down.
Specifically, the discharge temperature protection point is a specific temperature value at which the air conditioner triggers discharge temperature protection. Preferably, in some embodiments, the exhaust temperature protection point is set at 98 ℃.
As shown in connection with fig. 4, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:
s401, controlling the operation frequency of the compressor to be reduced by the air conditioner under the condition of triggering over-current protection.
S402, the air conditioner determines a target opening degree of the expansion valve.
S403, the air conditioner controls the opening degree of the expansion valve to increase to the target opening degree, and locks the opening degree.
S404, the air conditioner continuously detects the exhaust temperature of the compressor.
S405, in the case where the exhaust temperature is greater than or equal to the first preset temperature, the air conditioner controls the opening degree of the expansion valve to increase to the maximum opening degree, and locks the opening degree.
S406, when the exhaust temperature is greater than or equal to the second preset temperature, the air conditioner controls the compressor to be closed, and the air conditioner is restarted after the preset shutdown time.
Wherein the second preset temperature is greater than the first preset temperature.
By adopting the method for controlling the air conditioner, which is provided by the embodiment of the application, under the condition of triggering over-current protection, the normal and reliable operation of the air conditioner can be ensured by controlling the frequency reduction of the compressor. Meanwhile, the opening 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 of the expansion valve follows the frequency change of the compressor can be avoided. Therefore, the secondary protection of the exhaust temperature triggered after the overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the operation stability of the air conditioner is improved. And simultaneously, continuously detecting the exhaust temperature of the compressor, and when the exhaust temperature protection is triggered and the exhaust temperature exceeds a second preset temperature, shutting down the compressor in time. So as to avoid damage to 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 protection point. Preferably, the first preset temperature may be set to 105 ℃. Any other value such as 104℃or 106℃may be used. In this way, the embodiment of the disclosure can shut down the compressor in time when the exhaust temperature is detected to be very high after triggering the exhaust temperature protection, so as to reduce damage to the compressor as much as possible, thereby being beneficial to prolonging the service life of the compressor.
Specifically, the discharge temperature protection point is a specific temperature value at which the air conditioner triggers discharge temperature protection. Preferably, in some embodiments, the exhaust temperature protection point is set at 98 ℃.
Optionally, the preset downtime may be adjusted according to a specific working condition. Preferably, the preset downtime period may be set to 5 minutes. Any other value such as 4min or 6min may be used. As such, the disclosed embodiments are able to keep the compressor shut down when necessary so that higher discharge temperatures can be quickly reduced, thereby reducing damage to the compressor.
As shown in connection with fig. 5, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:
s501, in the case of triggering the overcurrent protection, the air conditioner controls the compressor to operate at a reduced frequency.
S502, the air conditioner determines a target opening degree of the expansion valve.
S503, the air conditioner controls the opening degree of the expansion valve to increase to the target opening degree, and locks the opening degree.
S504, the air conditioner continuously detects the exhaust temperature of the compressor.
S505, in case the discharge temperature is less than or equal to the third preset temperature, the air conditioner controls the compressor to increase in operation frequency.
By adopting the method for controlling the air conditioner, which is provided by the embodiment of the application, under the condition of triggering over-current protection, the normal and reliable operation of the air conditioner can be ensured by controlling the frequency reduction of the compressor. Meanwhile, the opening 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 of the expansion valve follows the frequency change of the compressor can be avoided. Therefore, the secondary protection of the exhaust temperature triggered after the overcurrent protection can be prevented, and the compressor is reduced in frequency again and even stopped, so that the operation stability of the air conditioner is improved. And simultaneously, continuously detecting the exhaust temperature of the compressor, and properly increasing the operating frequency of the compressor when the exhaust temperature is smaller than a third preset temperature. On the premise that the air conditioner can not trigger the exhaust temperature protection, the refrigerating 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 ℃. Other arbitrary values such as 91℃or 92℃may be set. In this way, the embodiments of the present disclosure can appropriately increase the operating frequency of the compressor in the case where the discharge temperature is low. On the premise that the air conditioner can not trigger the exhaust temperature protection, the refrigerating effect of the air conditioner can be further improved, and the user experience is improved.
As shown in connection with fig. 6, an embodiment of the present disclosure provides an apparatus for controlling an air conditioner, including a processor (processor) 601 and a memory (memory) 602. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 603 and a bus 604. The processor 601, the communication interface 603, and the memory 602 may communicate with each other via the bus 604. The 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 an air conditioner of the above-described embodiment.
Further, the logic instructions in the memory 602 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product.
The memory 602 is a computer readable storage medium that can be used to store a software program, a computer executable program, 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, i.e., implements the method for controlling an 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, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. In addition, 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 may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only 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. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (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 disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, 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 one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will 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 depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts 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 that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. 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.
Claims (8)
1. A method for controlling an air conditioner, comprising:
controlling the compressor to operate at a reduced frequency under the triggering of the over-current protection;
determining a target opening degree of an expansion valve;
controlling the opening of the expansion valve to be increased to a target opening, and locking the opening;
the determining the target opening degree of the expansion valve includes:
determining a current opening K0;
calculation ofObtaining a compensation opening X;
calculation ofObtaining a target opening K1;
wherein a is a compensation coefficient, and Kmax is the maximum opening of the expansion valve;
after the opening degree of the control expansion valve is increased to the target opening degree and the opening degree is locked, the method further comprises the steps of:
continuously detecting the exhaust temperature of the compressor;
controlling the opening of the expansion valve to be increased to the maximum opening and locking the opening under the condition that the exhaust temperature is greater than or equal to a first preset temperature; the first preset temperature is less than the exhaust temperature protection point.
2. The method of claim 1, wherein the controlling the opening of the expansion valve to increase to a target opening comprises:
determining an opening increase rate according to the exhaust temperature;
and increasing the opening of the expansion valve to a target opening according to the opening increasing rate.
3. The method of claim 1, wherein the triggering of the over-current protection comprises:
continuously obtaining working current;
and under the condition that the working current is greater than or equal to a preset current threshold value, judging that the overcurrent protection is triggered.
4. The method of claim 1, wherein said controlling a compressor operating frequency reduction comprises:
determining a rate of frequency decrease based on the exhaust temperature;
and reducing the operating frequency of the compressor to a target frequency according to the frequency reduction rate.
5. The method according to any one of claims 1 to 4, wherein after the opening degree of the control expansion valve is increased to the target opening degree and the opening degree is locked, further comprising:
judging whether a preset unlocking condition is met or not;
and under the condition that the preset unlocking condition is met, unlocking the opening degree of the expansion valve.
6. An apparatus for controlling an air conditioner comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling an air conditioner according to any one of claims 1 to 5 when the program instructions are executed.
7. An air conditioner comprising the apparatus for controlling an air conditioner according to claim 6.
8. A storage medium storing program instructions which, when executed, perform the method for controlling an air conditioner according to any one of claims 1 to 5.
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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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