CN114543305B - Air conditioner control method and device and air conditioner - Google Patents
Air conditioner control method and device and air conditioner Download PDFInfo
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- CN114543305B CN114543305B CN202210106480.4A CN202210106480A CN114543305B CN 114543305 B CN114543305 B CN 114543305B CN 202210106480 A CN202210106480 A CN 202210106480A CN 114543305 B CN114543305 B CN 114543305B
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000008859 change Effects 0.000 claims description 54
- 230000005494 condensation Effects 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 description 16
- 230000002159 abnormal effect Effects 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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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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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method and a control device of an air conditioner and the air conditioner, wherein the control method of the air conditioner comprises the following steps: determining a real-time air conditioner system state based on a real-time exhaust temperature of the air conditioner; determining a real-time correction coefficient value based on the real-time air conditioner system state; correcting the air conditioner protection parameter threshold based on the real-time correction coefficient value; and executing the air conditioner protection function based on the corrected air conditioner protection parameter threshold value. By the method and the device, the air conditioner protection function is implemented according to the state of the air conditioner, the accuracy and the effectiveness of protection control are improved, and the intelligence of the air conditioner is improved.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a control method and device of an air conditioner and the air conditioner.
Background
The air conditioner uses a refrigerant circulation system formed by a compressor, a condenser, a throttling device, an evaporator and the like to execute the refrigerating and heating cycle of the air conditioner, so as to regulate the temperature, the humidity and the like of indoor air and provide a comfortable indoor environment for a user.
In the use process of the air conditioner, in order to maintain the reliable operation of the system, various protection functions, such as an exhaust temperature protection function, a current limiting protection function, a high-voltage protection function, a compressor frequency limiting protection function and the like, are generally required to be set. And each protection function is correspondingly provided with a protection parameter, and if the protection parameter reaches a protection parameter threshold value in the running process of the air conditioner, the protection function is executed to control the air conditioner to stop.
In the prior art, the protection parameter threshold values are all preset fixed values, and are usually preset into an air conditioner controller before the air conditioner leaves a factory, and the air conditioner is directly called for use during operation. In general, the protection parameter threshold is set for the refrigerant circulation system of the air conditioner under normal conditions, but during the actual operation of the air conditioner, the refrigerant circulation system is usually abnormal. For the prior art, the same protection parameter threshold value is adopted to execute the function protection of the air conditioner according to the conditions of normal system and abnormal system, and the problem of over protection or under protection exists. If the protection is excessive, the air conditioner is frequently stopped for protection, so that the normal use of the air conditioner is affected, and the comfort experience of a user is reduced; if the protection is insufficient, potential safety hazards exist, and the use safety and the service life of the air conditioner are affected.
Disclosure of Invention
The invention aims to provide a control method and a control device for an air conditioner, which execute the protection function of the air conditioner according to the state of the air conditioner and improve the accuracy and the effectiveness of the protection function.
In order to achieve the above object, the present invention provides a control method for an air conditioner, which is implemented by adopting the following technical scheme:
a control method of an air conditioner, the method comprising:
determining a real-time air conditioner system state based on a real-time exhaust temperature of the air conditioner;
determining a real-time correction coefficient value based on the real-time air conditioner system state;
correcting the air conditioner protection parameter threshold based on the real-time correction coefficient value;
and executing the air conditioner protection function based on the corrected air conditioner protection parameter threshold value.
In one preferred embodiment, determining a real-time air conditioner system status based on a real-time discharge temperature of an air conditioner includes:
acquiring the real-time exhaust temperature of the air conditioner and the real-time outer surface temperature of the compressor;
determining a real-time temperature change parameter value from the real-time exhaust temperature and the real-time exterior surface temperature;
and determining the real-time air conditioner system state corresponding to the real-time temperature change parameter value according to the known correlation between the temperature change parameter value and the air conditioner system state.
In one preferred embodiment, determining a real-time air conditioner system status based on a real-time discharge temperature of an air conditioner includes:
acquiring the real-time exhaust temperature of the air conditioner and the real-time condensation temperature of the air conditioner;
determining a real-time temperature change parameter value according to the real-time exhaust temperature and the real-time condensing temperature;
and determining the real-time air conditioner system state corresponding to the real-time temperature change parameter value according to the known correlation between the temperature change parameter value and the air conditioner system state.
In one preferred embodiment, the correlation includes a plurality of temperature variation parameter value ranges, a plurality of air conditioner system states, and a one-to-one correspondence between each temperature variation parameter value range and an air conditioner system state;
determining a real-time air conditioner system state corresponding to the real-time temperature variation parameter value according to the known correlation between the temperature variation parameter value and the air conditioner system state, comprising:
and determining a temperature change parameter value range to which the real-time temperature change parameter value belongs, and determining an air conditioner system state corresponding to the temperature change parameter value range to which the real-time temperature change parameter value belongs as the real-time air conditioner system state.
In one preferred embodiment, determining a real-time correction coefficient value based on the real-time air conditioner system state includes:
determining a real-time correction coefficient value corresponding to the real-time air conditioner system state according to the known correlation between the air conditioner system state and the correction coefficient value;
the known correlation between the air conditioner system state and the correction coefficient value comprises a plurality of air conditioner system states, a plurality of correction coefficient values and a one-to-one correspondence between each air conditioner system state and one correction coefficient value, and each correction coefficient value satisfies the following conditions: the correction coefficient value is more than or equal to 0 and less than or equal to 1.
In one preferred embodiment, correcting the air conditioner protection parameter threshold based on the real-time correction coefficient value includes:
and acquiring an air conditioner protection parameter standard threshold, multiplying the real-time correction coefficient value by the air conditioner protection parameter standard threshold, and determining the product as the corrected air conditioner protection parameter threshold.
In order to achieve the above object, the present invention provides a control device for an air conditioner, which is implemented by adopting the following technical scheme:
a control apparatus of an air conditioner, the apparatus comprising:
the real-time air conditioner system state determining module is used for determining the real-time air conditioner system state based on the real-time exhaust temperature of the air conditioner;
the real-time correction coefficient value determining module is used for determining a real-time correction coefficient value based on the real-time air conditioner system state;
the air conditioner protection parameter threshold value correction module is used for correcting the air conditioner protection parameter threshold value based on the real-time correction coefficient value;
and the control module is used for executing the air conditioner protection function based on the corrected air conditioner protection parameter threshold value.
In one preferred embodiment, the real-time air conditioner system status determination module includes:
the real-time exhaust temperature acquisition unit is used for acquiring the real-time exhaust temperature of the air conditioner;
a real-time outer surface temperature acquisition unit for acquiring the real-time outer surface temperature of the compressor;
a real-time temperature change parameter value determining unit configured to determine a real-time temperature change parameter value according to the real-time exhaust gas temperature and the real-time outer surface temperature;
and the real-time air conditioner system state determining unit is used for determining the real-time air conditioner system state corresponding to the real-time temperature change parameter value according to the known correlation between the temperature change parameter value and the air conditioner system state.
In one preferred embodiment, the real-time air conditioner system status determination module includes:
the real-time exhaust temperature acquisition unit is used for acquiring the real-time exhaust temperature of the air conditioner;
the real-time condensation temperature acquisition unit is used for acquiring the real-time condensation temperature of the air conditioner;
a real-time temperature change parameter value determining unit for determining a real-time temperature change parameter value according to the real-time exhaust temperature and the real-time condensing temperature;
and the real-time air conditioner system state determining unit is used for determining the real-time air conditioner system state corresponding to the real-time temperature change parameter value according to the known correlation between the temperature change parameter value and the air conditioner system state.
The invention also provides an air conditioner which comprises the control device of the air conditioner.
Compared with the prior art, the invention has the advantages and positive effects that:
according to the control method and the control device for the air conditioner, the air conditioner system state is determined according to the exhaust temperature of the air conditioner, and the air conditioner protection parameter threshold value is corrected based on the air conditioner system state, so that the air conditioner protection parameter threshold value dynamically changes along with the air conditioner system state, the flexible variability and the accuracy of the protection parameter threshold value are improved, when the air conditioner is subjected to the protection function based on the corrected air conditioner protection parameter threshold value, compared with the existing technology that the protection parameter threshold value of the air conditioner is fixed, the situation of over protection or under protection is not easy to occur, the accuracy and the effectiveness of the protection function of the air conditioner are improved, the intelligence of the air conditioner is improved, the balance between the use safety and the use comfort of the air conditioner is achieved, and the integral performance of the air conditioner is improved.
Other features and advantages of the present invention will become apparent upon review of the detailed description of the invention in conjunction with the drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an embodiment of a control method of an air conditioner according to the present invention;
FIG. 2 is a flow chart of another embodiment of a control method of an air conditioner according to the present invention;
FIG. 3 is a flow chart of a control method of an air conditioner according to another embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of an embodiment of a control device of an air conditioner according to the present invention;
FIG. 5 is a schematic view of another embodiment of a control device of an air conditioner according to the present invention;
fig. 6 is a schematic structural view of a control device of an air conditioner according to still another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
It should be noted that, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the technical solutions are not combined, and are not within the scope of protection claimed by the present invention.
The embodiments described below provide an air conditioner in which a cooling and heating cycle of the air conditioner is performed by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigerating and heating cycle includes a series of processes involving compression, condensation, expansion and evaporation, and refrigerating or heating an indoor space.
The refrigeration working principle of the air conditioner is as follows: the compressor works to enable the interior of the indoor heat exchanger (in the indoor unit, the evaporator at the moment) to be in an ultralow pressure state, liquid refrigerant in the indoor heat exchanger rapidly evaporates and absorbs heat, and air blown out by the indoor fan is cooled by the indoor heat exchanger coil and then changed into cold air to be blown into the room. The evaporated and gasified refrigerant is pressurized by the compressor, condensed into liquid state in the high-pressure environment in the outdoor heat exchanger (in the outdoor unit, the condenser at the moment), heat is released, and the heat is emitted to the atmosphere through the outdoor fan, so that the refrigerating effect is achieved through circulation.
The heating working principle of the air conditioner is as follows: the gaseous refrigerant is pressurized by the compressor to become high-temperature high-pressure gas, and enters the indoor heat exchanger (a condenser at the moment), so that the gaseous refrigerant is condensed, liquefied and released heat to become liquid, and meanwhile, the indoor air is heated, so that the aim of improving the indoor temperature is fulfilled. The liquid refrigerant is decompressed by the throttling device, enters the outdoor heat exchanger (an evaporator at the moment), evaporates, gasifies and absorbs heat to become gas, and simultaneously absorbs heat of outdoor air (the outdoor air becomes colder) to become gaseous refrigerant, and enters the compressor again to start the next cycle.
Aiming at the technical problems in the prior art that the protection parameter threshold value of the air conditioner is fixed and the same protection parameter threshold value is adopted to execute the function protection of the air conditioner under different states of the air conditioner system, the invention creatively proposes to adaptively correct the protection parameter threshold value according to the different states of the air conditioner, execute the protection function of the air conditioner based on the corrected protection parameter threshold value, and achieve the technical aim of improving the accuracy and the effectiveness of the protection function of the air conditioner.
Fig. 1 is a schematic flow chart of an embodiment of a control method of an air conditioner according to the present invention, specifically, an embodiment for implementing protection control of the air conditioner. Specifically, this embodiment realizes the control of the air conditioner by adopting the following procedure:
s10: the real-time air conditioner system status is determined based on the real-time exhaust temperature of the air conditioner.
The real-time exhaust temperature is the exhaust temperature which is continuously acquired according to a set sampling period in the operation process of the air conditioner, and can be acquired by setting a temperature acquisition unit at the exhaust port of the compressor or at the position, close to the exhaust port, of an exhaust pipe connected with the exhaust port of the compressor.
When the air conditioner operates, the exhaust temperature can better reflect the system state of the air conditioner, and the exhaust temperature is easy to detect and obtain; on the other hand, the exhaust temperature is a common parameter in the operation control of the air conditioner, and the air conditioner is generally provided with an exhaust temperature detecting device. Therefore, the exhaust temperature is used as a parameter for determining the system state of the air conditioner, so that the actual running state of the air conditioner can be determined, and the hardware cost is not required to be increased, thereby obtaining the real-time system state of the air conditioner in a simple and easy manner.
S20: a real-time correction coefficient value is determined based on the real-time air conditioner system status.
The process can determine the real-time correction coefficient value corresponding to the real-time air conditioner system state by presetting the relation between the air conditioner system state and the correction coefficient value. Generally, the air conditioner system states are different, and the corresponding correction coefficient values are also different, so that the execution of the protection function is matched with the air conditioner system states.
S30: and correcting the air conditioner protection parameter threshold value based on the real-time correction coefficient value.
The air conditioner protection parameter threshold value can be a threshold value of various protection parameters required by realizing functional protection configured by the existing air conditioner; also included are thresholds for various protection parameters that may be needed to achieve functional protection for a newly configured air conditioner in the future as performance requirements of the air conditioner increase. Air conditioner protection parameters including, but not limited to, discharge protection temperature, current limiting, compressor frequency limiting, etc.
In general, the threshold value of the air conditioner protection parameter is preset with a basic value or a default value at the time of shipment. The correction of the protection parameter threshold of the air conditioner based on the real-time correction coefficient value in this embodiment may be performed by correcting a default value or a basic value of a preset protection parameter threshold, or may be performed by further correcting the protection parameter threshold after the previous correction, and these different embodiments all belong to the protection scope of the present invention.
S40: and executing the air conditioner protection function based on the corrected air conditioner protection parameter threshold value.
And executing the specific implementation of the air conditioner protection function according to the determined air conditioner protection parameter threshold value, and adopting the prior art to realize the implementation. The embodiment uses the corrected air conditioner protection parameter threshold value as a determined threshold value, and executes the air conditioner protection function based on the determined threshold value.
By adopting the control method of the embodiment, the system state of the air conditioner is determined according to the exhaust temperature of the air conditioner, and then the protection parameter threshold of the air conditioner is corrected based on the system state of the air conditioner, so that the protection parameter threshold of the air conditioner dynamically changes along with the system state of the air conditioner, the flexible variability and the accuracy of the protection parameter threshold are improved, when the protection function is executed on the air conditioner based on the corrected protection parameter threshold of the air conditioner, compared with the prior art that the protection parameter threshold of the air conditioner is fixed, the situation of over protection or under protection is difficult to occur, the accuracy and the effectiveness of the protection function of the air conditioner are improved, the balance between the use safety and the use comfort of the air conditioner is achieved, and the integral performance of the air conditioner is improved.
In other preferred embodiments, determining the real-time correction coefficient value based on the real-time air conditioner system state includes:
and determining a real-time correction coefficient value corresponding to the real-time air conditioner system state according to the known correlation between the air conditioner system state and the correction coefficient value. The known correlation between the air conditioner system state and the correction coefficient value comprises a plurality of air conditioner system states, a plurality of correction coefficient values and a one-to-one correspondence between each air conditioner system state and one correction coefficient value, and each correction coefficient value satisfies the following conditions: the correction coefficient value is more than or equal to 0 and less than or equal to 1. The one-to-one correspondence between the system state of the air conditioner and the correction coefficient value is preset, so that the real-time correction coefficient value can be conveniently and quickly determined, and the timeliness of protection control response is improved.
In other preferred embodiments, correcting the air conditioner protection parameter threshold based on the real-time correction coefficient value includes: and acquiring an air conditioner protection parameter standard threshold, multiplying the real-time correction coefficient value by the air conditioner protection parameter standard threshold, and determining the product as the corrected air conditioner protection parameter threshold. And the product of the real-time correction coefficient value and the air conditioner protection parameter standard threshold value is adopted to determine the corrected air conditioner protection parameter threshold value, so that the protection parameter threshold value matched with the air conditioner system state can be conveniently and rapidly determined accurately to participate in protection control, and the accuracy and the effectiveness of the protection control are improved.
The exhaust temperature may be a good reflection of the air conditioner system condition in most situations, but may be limited in some situations. To overcome this technical problem, in some preferred embodiments, other parameter values during the operation of the air conditioner are also obtained, and according to the combination of the other parameter values and the exhaust temperature, the accuracy of determining the system state of the air conditioner can be improved, so that the reliability of executing the protection function of the air conditioner by correcting the protection parameter threshold value of the air conditioner based on the system state of the air conditioner is improved.
Fig. 2 is a schematic flow chart of another embodiment of the control method of the air conditioner according to the present invention, specifically, a schematic flow chart of a specific embodiment of determining a system state of the real-time air conditioner based on a real-time exhaust temperature of the air conditioner according to the embodiment of fig. 1.
Specifically, the embodiment adopts the following process to determine the system state of the air conditioner in real time, thereby realizing the control of the air conditioner.
S111: the method comprises the steps of acquiring the real-time exhaust temperature of the air conditioner and the real-time outer surface temperature of the compressor.
The real-time exhaust temperature is the exhaust temperature which is continuously acquired according to a set sampling period in the operation process of the air conditioner, and can be acquired by setting a temperature acquisition unit at the exhaust port of the compressor or at the position, close to the exhaust port, of an exhaust pipe connected with the exhaust port of the compressor.
The real-time outer surface temperature of the compressor is the outer surface temperature of the compressor which is continuously acquired according to a set sampling period in the running process of the air conditioner, and the outer surface temperature can be acquired by arranging a temperature acquisition unit on a shell of the compressor. Preferably, a temperature acquisition unit is provided at the top of the compressor housing, the acquired temperature being the real-time external surface temperature of the compressor.
S112: and determining a real-time temperature change parameter value according to the real-time exhaust temperature and the real-time outer surface temperature.
The real-time temperature change parameter value determined according to the real-time exhaust temperature and the real-time outer surface temperature can be the difference between the two real-time temperatures or the change rate of the difference between the two real-time temperatures.
S113: and determining the state of the real-time air conditioner system corresponding to the real-time temperature change parameter value.
The process determines the real-time air conditioner system state corresponding to the real-time temperature change parameter value through the known correlation between the temperature change parameter value and the air conditioner system state.
As a preferred embodiment, the correlation includes a plurality of temperature variation parameter value ranges, a plurality of air conditioner system states, and a one-to-one correspondence relationship between each temperature variation parameter value range and one air conditioner system state. Determining a real-time air conditioner system state corresponding to the real-time temperature variation parameter value according to the known correlation of the temperature variation parameter value and the air conditioner system state, including:
and determining a temperature change parameter value range to which the real-time temperature change parameter value belongs, and determining the air conditioner system state corresponding to the temperature change parameter value range to which the real-time temperature change parameter value belongs as the real-time air conditioner system state.
In the embodiment, the real-time temperature change parameter value is determined according to the real-time exhaust temperature and the real-time outer surface temperature, and then the real-time air conditioner system state is determined according to the real-time temperature change parameter value, so that the system state is determined more accurately.
After the real-time air conditioner system state is determined, the real-time correction coefficient value is further determined according to the real-time air conditioner system state, the air conditioner protection parameter threshold value is corrected according to the real-time correction coefficient value, and finally the air conditioner protection function is executed according to the corrected air conditioner protection parameter threshold value, so that the accuracy and the effectiveness of the air conditioner protection function can be further improved.
Fig. 3 is a schematic flow chart of a control method of an air conditioner according to another embodiment of the present invention, specifically, a schematic flow chart of another specific embodiment of determining a system state of a real-time air conditioner based on a real-time exhaust temperature of the air conditioner according to the embodiment of fig. 1.
Specifically, the embodiment adopts the following process to determine the system state of the air conditioner in real time, thereby realizing the control of the air conditioner.
S121: and acquiring the real-time exhaust temperature of the air conditioner and the real-time condensation temperature of the air conditioner.
The real-time exhaust temperature is the exhaust temperature which is continuously acquired according to a set sampling period in the operation process of the air conditioner, and can be acquired by setting a temperature acquisition unit at the exhaust port of the compressor or at the position, close to the exhaust port, of an exhaust pipe connected with the exhaust port of the compressor.
The real-time condensing temperature is the temperature of the condenser which is continuously acquired according to a set sampling period in the running process of the air conditioner, and can be acquired by setting a temperature acquisition unit on the condenser.
S122: and determining a real-time temperature change parameter value according to the real-time exhaust temperature and the real-time condensing temperature.
The real-time temperature change parameter value determined according to the real-time exhaust temperature and the real-time condensing temperature may be the difference between the two real-time temperatures or the change rate of the difference between the two real-time temperatures.
S123: and determining the state of the real-time air conditioner system corresponding to the real-time temperature change parameter value.
The process determines the real-time air conditioner system state corresponding to the real-time temperature change parameter value through the known correlation between the temperature change parameter value and the air conditioner system state. Reference is made to the corresponding description in the example of fig. 2 for a preferred embodiment.
In the embodiment, the real-time temperature change parameter value is determined according to the real-time exhaust temperature and the real-time condensing temperature, and then the real-time air conditioner system state is determined according to the real-time temperature change parameter value, so that the system state is determined more accurately.
After the real-time air conditioner system state is determined, the real-time correction coefficient value is further determined according to the real-time air conditioner system state, the air conditioner protection parameter threshold value is corrected according to the real-time correction coefficient value, and finally the air conditioner protection function is executed according to the corrected air conditioner protection parameter threshold value, so that the accuracy and the effectiveness of the air conditioner protection function can be further improved.
The following describes a specific implementation of the control method of the air conditioner according to the present invention with a specific embodiment:
the correlation between the temperature change parameter values and the system state of the air conditioner is preset:
Δt < Δt1, and the corresponding air conditioner system state is the first state. The first state, representing a normal state.
And the delta T1 is less than or equal to delta T < delta T2, and the corresponding air conditioner system state is the second state. And a second state, representing a slightly abnormal state.
Δt2 is less than or equal to Δt3, and the corresponding air conditioner system state is a third state; and a third state, representing a medium anomaly state.
And the delta T is more than or equal to delta T3, and the corresponding air conditioner system state is a fourth state. And a fourth state, representing a severely abnormal state.
Wherein Δt1< Δt2 < Δt3.
Further, the following correlation between the air conditioner system state and the correction coefficient value is preset:
the air conditioner system state is the first state and the correction coefficient for the air conditioner is k1. And k1=1.
The air conditioner system state is the second state and the correction factor for the air conditioner system state is k2. And 0< k2<1.
The air conditioner system state is the third state and the correction coefficient for the air conditioner is k3. And 0< k3< k2.
The air conditioner system state is the fourth state and the correction coefficient for the fourth state is k4. And k4=0.
The air conditioner is started and operated for a period of time, and then the air conditioner system is in a stable operation state. Acquiring the temperature of the outer surface of the compressor, and recording as T1; meanwhile, the exhaust temperature of the air conditioner is acquired and is denoted as T2. The temperature difference Δt of the two temperatures is calculated: Δt=i1 to T2 as a temperature change parameter value.
And comparing the delta T with delta T1, delta T2 and delta T3 respectively, determining the range of the temperature change parameter value to which the delta T belongs, and further determining the current air conditioner system state according to the correlation between the temperature change parameter value and the air conditioner system state. For example, Δt is greater than Δt1 but less than Δt2, that is, satisfies: and if the delta T1 is less than or equal to delta T < delta T2, determining that the current air conditioner system state is a second state, namely a slight abnormal state, according to the correlation.
Further, after determining the air conditioner system state, determining the current correction coefficient value based on the correlation between the air conditioner system state and the correction coefficient value. If the current air conditioner system state is the second state, the corresponding current correction coefficient value is k2.
And correcting the known air conditioner protection parameter standard threshold value based on the current correction coefficient value k2, specifically multiplying the air conditioner protection parameter standard threshold value by k2 to obtain a product which is the corrected air conditioner protection parameter threshold value. Because 0< k2<1, the corrected air conditioner protection parameter threshold value obtained is smaller than the air conditioner protection parameter standard threshold value, but still greater than 0. That is, when the air conditioner system is in a slight abnormal state, the air conditioner can still be used continuously, but the parameter threshold value used for actually executing the protection function of the air conditioner is reduced, so that the protection control can be more easily entered, the stronger protection control can be obtained when the air conditioner system has a slight abnormal state, and the safety problem is avoided.
If the system state of the air conditioner is determined to be the first state according to the delta T, and the corresponding correction coefficient k1 = 1, the corrected air conditioner protection parameter threshold value is equal to the air conditioner protection parameter standard threshold value, and the air conditioner protection parameter standard threshold value is unchanged. That is, when the air conditioner system state is the first state, the air conditioner system is in a normal state, and the air conditioner is controlled according to the preset standard threshold value of the air conditioner protection parameter, so that the normal use of the air conditioner can be kept, the comfort requirement required by using the air conditioner is ensured, and the normal protection can be performed.
If the air conditioner system state is determined to be the third state according to the delta T, the air conditioner system is in a medium abnormal state. At this time, the corresponding correction coefficient is k3, and 0< k3< k2. The corrected air conditioner protection parameter threshold value obtained based on k3 is smaller than the air conditioner protection parameter standard threshold value, is also smaller than the corrected air conditioner protection parameter threshold value determined based on k2 when the air conditioner system state is the second state, and is still larger than 0. Therefore, when the air conditioner system is in the third state of the medium abnormal state, the air conditioner can still be used continuously, but the parameter threshold value used for actually executing the protection function of the air conditioner is reduced and smaller than the threshold value used in the second state of the air conditioner system in the slight abnormal state, so that the air conditioner is easier to enter the protection control, has stronger protection control measures and avoids the safety problem.
And if the delta T determines that the air conditioner system state is the fourth state, the air conditioner system is in a serious abnormal state. At this time, the corresponding correction coefficient is k4, and k4=0. And (3) if the threshold value of each corrected air conditioner protection parameter obtained based on the k4 is 0, the air conditioner system directly enters protection control, and the air conditioner is stopped. That is, when the air conditioner system is in a serious abnormal state, the air conditioner cannot continue to operate and is directly stopped.
Fig. 4 is a schematic structural view of an embodiment of a control device of an air conditioner according to the present invention. Specifically, a schematic structural diagram of an embodiment of a control device for implementing protection control of an air conditioner is provided.
As shown in fig. 4, the control device of this embodiment includes structural modules, functions of each module, and interrelationships among the modules, which are specifically described as follows:
the control device comprises:
the real-time air conditioner system state determination module 50 is configured to determine a real-time air conditioner system state based on a real-time exhaust temperature of the air conditioner.
The real-time correction coefficient value determining module 60 is configured to determine a real-time correction coefficient value based on the real-time air conditioner system state determined by the real-time air conditioner system state determining module 50.
The air conditioner protection parameter threshold value correcting module 70 is configured to correct the air conditioner protection parameter threshold value based on the real-time correction coefficient value determined by the real-time correction coefficient value determining module 60.
The control module 70 is configured to execute an air conditioner protection function based on the air conditioner protection parameter threshold corrected by the air conditioner protection parameter threshold correction module 70.
The control device with the structure runs corresponding software programs to execute corresponding functions, and performs air conditioner control according to the control method embodiment and the process of the preferred embodiment of the air conditioner in fig. 1, so as to achieve the corresponding technical effects with the embodiment and the preferred embodiment of the air conditioner in fig. 1.
Fig. 5 is a schematic structural diagram of another embodiment of the control device of the air conditioner according to the present invention, specifically, a schematic structural diagram of a specific embodiment of the real-time air conditioner system state determining module in fig. 4.
As shown in fig. 5, the real-time air conditioner system state determining module in the control device of this embodiment includes structural units, functions of each unit, and interrelationships among the units, which are specifically described as follows:
the real-time air conditioner system state determining module comprises:
the real-time exhaust temperature acquisition unit 511 is configured to acquire the real-time exhaust temperature of the air conditioner.
A real-time external surface temperature acquisition unit 512 for acquiring the real-time external surface temperature of the compressor.
A real-time temperature change parameter value determining unit 513 for determining a real-time temperature change parameter value from the real-time exhaust gas temperature acquired by the real-time exhaust gas temperature acquiring unit 511 and the real-time outer surface temperature acquired by the real-time outer surface temperature acquiring unit 512.
A real-time air conditioner system state determining unit 514 for determining a real-time air conditioner system state corresponding to the real-time temperature variation parameter value determined by the real-time temperature variation parameter value determining unit 513 according to the known correlation between the temperature variation parameter value and the air conditioner system state.
The control device with the above structure runs corresponding software programs to execute corresponding functions, and performs air conditioner control according to the control method embodiment of the air conditioner of fig. 1 and 2 and the process of the preferred embodiment thereof, so as to achieve the corresponding technical effects with the embodiments of fig. 1 and 2 and the preferred embodiment thereof.
Fig. 6 is a schematic structural diagram of a control device for an air conditioner according to still another embodiment of the present invention, and in particular, a schematic structural diagram of another embodiment of a system status determining module for a real-time air conditioner in fig. 4.
As shown in fig. 6, the real-time air conditioner system state determining module in the control device of this embodiment includes structural units, functions of each unit, and interrelationships among the units, which are specifically described as follows:
the real-time air conditioner system state determining module comprises:
the real-time exhaust temperature acquisition unit 521 is configured to acquire the real-time exhaust temperature of the air conditioner.
A real-time condensing temperature acquiring unit 522 for acquiring the real-time condensing temperature of the air conditioner.
The real-time temperature variation parameter value determining unit 52 is configured to determine a real-time temperature variation parameter value according to the real-time exhaust gas temperature acquired by the real-time exhaust gas temperature acquiring unit 521 and the real-time condensation temperature acquired by the real-time condensation temperature acquiring unit 522.
The real-time air conditioner system state determining unit 524 is configured to determine a real-time air conditioner system state corresponding to the real-time temperature variation parameter value determined by the real-time temperature variation parameter value determining unit 523 according to the known correlation between the temperature variation parameter value and the air conditioner system state.
The control device with the above structure runs corresponding software programs to execute corresponding functions, and performs air conditioner control according to the control method embodiment of the air conditioner of fig. 1 and 3 and the process of the preferred embodiment thereof, so as to achieve the corresponding technical effects with the embodiments of fig. 1 and 3 and the preferred embodiment thereof.
The control device of the air conditioner is applied to the air conditioner, and the air conditioner protection function is executed according to the state of the air conditioner by practice, so that the accuracy and the effectiveness of the protection function are improved.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (5)
1. A control method of an air conditioner, the method comprising:
acquiring the real-time exhaust temperature of the air conditioner, and also acquiring the real-time outer surface temperature of the compressor or the real-time condensation temperature of the air conditioner;
determining a real-time temperature change parameter value according to a temperature difference between the real-time exhaust temperature and the real-time external surface temperature, or determining the real-time temperature change parameter value according to a temperature difference between the real-time exhaust temperature and the real-time condensing temperature;
determining a real-time air conditioner system state corresponding to the real-time temperature change parameter value according to the known correlation between the temperature change parameter value and the air conditioner system state; the known correlation of temperature change parameter values with air conditioner system status includes: deltat < deltat 1, the corresponding air conditioner system state is the first state; Δt1 is less than or equal to Δt2, and the corresponding air conditioner system state is a second state; Δt2 is less than or equal to Δt3, and the corresponding air conditioner system state is a third state; the delta T is more than or equal to delta T3, and the corresponding air conditioner system state is a fourth state; Δt is the temperature difference, Δt1< Δt2 < Δt3;
determining a real-time correction coefficient value corresponding to the real-time air conditioner system state according to the known correlation between the air conditioner system state and the correction coefficient value; the known correlation between the air conditioner system state and the correction coefficient value comprises: the system state of the air conditioner is the first state, and the corresponding correction coefficient is k1, k1=1; the system state of the air conditioner is the second state, and the corresponding correction coefficient is k2,0< k2<1; the system state of the air conditioner is the third state, and the corresponding correction coefficient is k3,0< k3< k2; the system state of the air conditioner is the fourth state, and the corresponding correction coefficient is k4, wherein k4 = 0;
correcting the air conditioner protection parameter threshold based on the real-time correction coefficient value;
and executing the air conditioner protection function based on the corrected air conditioner protection parameter threshold value.
2. The control method of an air conditioner according to claim 1, wherein correcting the air conditioner protection parameter threshold based on the real-time correction coefficient value includes:
and acquiring an air conditioner protection parameter standard threshold, multiplying the real-time correction coefficient value by the air conditioner protection parameter standard threshold, and determining the product as the corrected air conditioner protection parameter threshold.
3. A control apparatus of an air conditioner, the apparatus comprising:
the real-time air conditioner system state determining module is used for acquiring the real-time exhaust temperature of the air conditioner and also acquiring the real-time outer surface temperature of the compressor or the real-time condensation temperature of the air conditioner; determining a real-time temperature change parameter value according to a temperature difference between the real-time exhaust temperature and the real-time external surface temperature, or determining the real-time temperature change parameter value according to a temperature difference between the real-time exhaust temperature and the real-time condensing temperature; determining a real-time air conditioner system state corresponding to the real-time temperature change parameter value according to the known correlation between the temperature change parameter value and the air conditioner system state; the known correlation of temperature change parameter values with air conditioner system status includes: deltat < deltat 1, the corresponding air conditioner system state is the first state; Δt1 is less than or equal to Δt2, and the corresponding air conditioner system state is a second state; Δt2 is less than or equal to Δt3, and the corresponding air conditioner system state is a third state; the delta T is more than or equal to delta T3, and the corresponding air conditioner system state is a fourth state; Δt is the temperature difference, Δt1< Δt2 < Δt3;
the real-time correction coefficient value determining module is used for determining a real-time correction coefficient value corresponding to the real-time air conditioner system state according to the known correlation between the air conditioner system state and the correction coefficient value; the known correlation between the air conditioner system state and the correction coefficient value comprises: the system state of the air conditioner is the first state, and the corresponding correction coefficient is k1, k1=1; the system state of the air conditioner is the second state, and the corresponding correction coefficient is k2,0< k2<1; the system state of the air conditioner is the third state, and the corresponding correction coefficient is k3,0< k3< k2; the system state of the air conditioner is the fourth state, and the corresponding correction coefficient is k4, wherein k4 = 0;
the air conditioner protection parameter threshold value correction module is used for correcting the air conditioner protection parameter threshold value based on the real-time correction coefficient value;
and the control module is used for executing the air conditioner protection function based on the corrected air conditioner protection parameter threshold value.
4. The control device of an air conditioner according to claim 3, wherein correcting the air conditioner protection parameter threshold value based on the real-time correction coefficient value includes:
and acquiring an air conditioner protection parameter standard threshold, multiplying the real-time correction coefficient value by the air conditioner protection parameter standard threshold, and determining the product as the corrected air conditioner protection parameter threshold.
5. An air conditioner characterized in that the air conditioner comprises the control device of the air conditioner as claimed in claim 3 or 4.
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