CN114151920B - Air conditioner system blockage detection method and device and air conditioner - Google Patents

Air conditioner system blockage detection method and device and air conditioner Download PDF

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Publication number
CN114151920B
CN114151920B CN202111371353.9A CN202111371353A CN114151920B CN 114151920 B CN114151920 B CN 114151920B CN 202111371353 A CN202111371353 A CN 202111371353A CN 114151920 B CN114151920 B CN 114151920B
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temperature
blockage
initial
air conditioner
preset
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CN114151920A (en
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卢国军
王成
周涯宸
张新明
袁封明
杨巨沁
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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 invention provides a method and a device for detecting blockage of an air conditioner system and an air conditioner; wherein, the method comprises the following steps: acquiring initial parameters of the air conditioner at the starting moment; acquiring the operation parameters of the air conditioner in real time during the operation of the air conditioner; judging whether the initial parameters and the operation parameters meet the blockage conditions or not, and generating a blockage detection result of the air-conditioning system; the blockage detection result comprises system full blockage and system micro blockage. In the detection mode, the blockage detection of the air conditioning system can be realized, and whether the blockage detection result is the full blockage of the system or the micro blockage of the system is also distinguished, so that the blockage detection precision of the air conditioning system is improved, the air conditioning system is conveniently and accurately protected in time, the air conditioner is prevented from being shut down due to the mistaken blockage, and the user experience is further improved.

Description

Air conditioner system blockage detection method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for detecting blockage of an air conditioning system and an air conditioner.
Background
In practical application, the air conditioner may cause system blockage due to forgetting to open the stop valve or due to capillary foreign matter blockage, the refrigerant circulation of the air conditioner is abnormal under the condition of system blockage, and the compressor is high in temperature and even burnt due to lack of cooling. Therefore, the method has important significance for detecting the blockage condition of the air conditioning system.
The existing air conditioning system blockage detection mainly comprises the steps of comparing the temperature of an indoor coil pipe during operation, the temperature of an outdoor environment and the temperature of the indoor coil pipe before starting after an air conditioning unit is started for a period of time, and judging that the air conditioning system is blocked and performing shutdown protection when a first difference value between the temperature of the indoor coil pipe during operation and the temperature of the indoor coil pipe and a second difference value between the temperature of the indoor coil pipe during operation and the temperature of the indoor coil pipe before starting are smaller than a certain set value delta T. Although whether the air conditioning system is blocked can be detected, because the indoor coil is positioned in the indoor unit, the change of the unit during operation is slow, the judgment is carried out only after the unit operates for a long time, such as 5min, and the compressor operates all the time before the judgment, so that the reliability of the compressor is influenced; and moreover, a certain amount of refrigerant flow can be ensured when the system is slightly blocked under many conditions, the temperature of the indoor coil pipe is greatly changed, the conditions of blocking, misinformation and machine halt are easily caused according to the temperature of the indoor coil pipe, and the user experience is reduced.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for detecting a blockage of an air conditioning system, and an air conditioner, which can not only realize the blockage detection of the air conditioning system, but also distinguish whether the blockage detection result is a system full blockage or a system micro blockage, thereby improving the precision of the blockage detection of the air conditioning system, and facilitating timely and accurate protection of the air conditioning system.
In a first aspect, an embodiment of the present invention provides a method for detecting a blockage of an air conditioning system, where the method includes: acquiring initial parameters of the air conditioner at the starting moment; wherein the initial parameters include: initial temperature T of outdoor environment Outer ring 0 Initial temperature T of compressor discharge P0 And the initial temperature T of the indoor coil Inner pipe 0 (ii) a Real-time acquisition during operation of air conditionerOperating parameters of the air conditioner; wherein the operating parameters include: ambient outdoor temperature T during operation Outer ring Compressor discharge temperature T P Indoor coil temperature T Inner tube Compressor current I and compressor continuous run time t; judging whether the initial parameters and the operation parameters meet the blockage conditions or not, and generating a blockage detection result of the air-conditioning system; wherein, the blockage detection result comprises system full blockage and system micro blockage.
The method for detecting the blockage of the air conditioning system can realize the blockage detection of the air conditioning system and also distinguish whether the blockage detection result is the full blockage or the micro blockage of the system, thereby improving the blockage detection precision of the air conditioning system, being convenient for timely and accurately protecting the air conditioning system, avoiding the shutdown protection of the air conditioner due to the mistaken blockage and further improving the experience degree of a user.
Preferably, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the blockage condition includes a micro-blockage condition and a full-blockage condition, and the step of determining whether the initial parameter and the operating parameter satisfy the blockage condition and generating a blockage detection result of the air conditioning system includes: judging whether the initial parameters and the operation parameters meet micro-plugging conditions, and if so, generating system micro-plugging; or judging whether the initial parameters and the operation parameters meet the full-blocking condition, and if so, generating the system full-blocking.
Different blockage detection results are realized by setting different blockage conditions, so that whether the system is slightly blocked or fully blocked when the air conditioning system is blocked is distinguished, and then the system is timely and accurately protected.
Preferably, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the step of determining whether the initial parameter and the operating parameter satisfy the micro blocking condition includes: judging the exhaust temperature T of the compressor P Whether or not it is not less than the first preset exhaust temperature T P1 Whether the compressor current I is not less than the first preset current I 1 And indoor coil temperature T Inner pipe And the initial temperature T of the indoor coil Inner tube 0 Whether or not the difference is not more than a first preset temperature difference Delta T 1 Sum of(ii) a If yes, generating the micro-blockage of the system.
When the air conditioning system is partially blocked, the circulation quantity of the refrigerant is reduced, the exhaust temperature of the compressor is increased, the running current of the compressor is increased, and the temperature difference change of the indoor coil is reduced, so that whether the system is slightly blocked or not can be judged according to the micro-blocking condition, namely the exhaust temperature of the compressor, the current of the compressor and the temperature change of the indoor coil, and compared with the condition that whether the air conditioning system is blocked or not is judged only according to the temperature change of the indoor coil, the blocking misjudgment is avoided, and the blocking judgment precision of the air conditioning system is improved.
Preferably, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the first preset exhaust temperature T is lower than the first preset exhaust temperature T P1 The value range is as follows: t is not less than 110 DEG C P1 Not more than 125 ℃ and a first preset current I 1 The maximum compressor current is multiplied by a coefficient A when the air conditioner normally operates, the range of the coefficient A is more than or equal to 1.1 and less than or equal to 1.3, and a first preset temperature difference delta T 1 The value range of delta T is more than or equal to 5 DEG C 1 ≤10℃。
Preferably, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the air conditioner operation includes a heating operation and a cooling operation, and the step of determining whether the initial parameter and the operation parameter satisfy a full blocking condition includes: if the initial temperature T of outdoor environment during refrigerating operation Outer ring 0 Not less than a second preset temperature T 2 Or the initial temperature T of the outdoor environment during heating operation Outer ring 0 Not less than a third preset temperature T 3 Judging whether the continuous operation time t of the compressor of the air conditioner is not less than the first preset time t 1 (ii) a If so, when the compressor discharge temperature T of the air conditioner P Not more than initial discharge temperature T of compressor P0 And a preset fourth temperature difference DeltaT 4 And when the sum is obtained, the generation system is completely blocked.
Preferably, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the step of determining whether the initial parameter and the operating parameter satisfy the full blocking condition further includes: if the initial temperature T of outdoor environment during refrigerating operation Outer ring 0 Less than the second predeterminedTemperature T 2 Or the initial temperature T of the outdoor environment during heating operation Outer ring 0 Less than a third preset temperature T 3 Judging whether the continuous running time t of the compressor of the air conditioner is not less than the second preset time t 2 (ii) a If so, when the compressor discharge temperature T of the air conditioner P Not more than initial temperature T of compressor exhaust P0 And a preset fourth temperature difference DeltaT 4 And when the sum is obtained, the generation system is completely blocked.
When the air-conditioning system is fully blocked, the refrigerant can not circulate, no refrigerant flows through the exhaust pipe at the moment, the exhaust temperature change is small, and the difference between the exhaust temperature after the compressor operates for a period of time and the initial exhaust temperature at the moment of starting is not large, so that whether the air-conditioning system is fully blocked or not is judged according to the difference between the exhaust temperature after the compressor operates for a period of time and the initial exhaust temperature at the moment of starting. The time for judging the full blockage of the system is determined according to the outdoor environment temperature when the unit is started, if the outdoor environment temperature is high, the exhaust temperature changes rapidly, and whether the system is full blocked can be judged earlier according to the change of the exhaust temperature so as to protect in advance; when the outdoor environment temperature is low, the exhaust temperature changes slowly, whether the system is completely blocked needs to be judged later to improve the accuracy of protection, so that different times are set for different outdoor environment temperatures, the air conditioner with the system completely blocked is conveniently and accurately protected in time, the air conditioner is prevented from being stopped and protected due to mistaken blocking, and the user experience is improved.
Preferably, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the second preset time t is 2 Is more than the first preset time t 1 Wherein the first preset time t 1 The value range of (1 min) is less than or equal to t 1 Less than or equal to 3min, a second preset time t 2 The value range of (1) is that t is less than or equal to 3min 1 Less than or equal to 6min, second preset temperature T 2 The value range of T is more than or equal to 20 DEG C 2 Not more than 30 ℃, and a third preset temperature T 3 The value range of T is less than or equal to minus 5 DEG C 3 Less than or equal to 5 ℃, and presetting a fourth temperature difference delta T 4 The value range of delta T is not less than 2 DEG C 4 ≤15℃。
In a second aspect, the inventionAn embodiment also provides an apparatus for detecting a blockage of an air conditioning system, the apparatus including: the first acquisition module is used for acquiring initial parameters at the moment of starting the air conditioner; wherein the initial parameters include: initial temperature T of outdoor environment Outer ring 0 Initial temperature T of compressor discharge P0 And the initial temperature T of the indoor coil Inner pipe 0 (ii) a The second acquisition module is used for acquiring the operation parameters of the air conditioner in real time during the operation of the air conditioner; wherein the operating parameters include: ambient outdoor temperature T in operation Outer ring Compressor discharge temperature T P Indoor coil temperature T Inner pipe Compressor current I and compressor continuous run time t; the blockage judging module is used for judging whether the initial parameters and the operation parameters meet the blockage conditions or not and generating a blockage detection result of the air conditioning system; wherein, the blockage detection result comprises system full blockage and system micro blockage.
In a third aspect, an embodiment of the present invention further provides an air conditioner, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method in the first aspect when executing the computer program.
In a fourth aspect, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the method in the first aspect.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a method and a device for detecting blockage of an air conditioner system and an air conditioner; the method comprises the steps of obtaining initial parameters at the moment of starting the air conditioner and operating parameters of the air conditioner in operation; judging whether the initial parameters and the operation parameters meet the blockage conditions or not to generate a blockage detection result of the air conditioning system; wherein, the blockage detection result comprises system full blockage and system micro blockage. In the detection mode, the blockage detection of the air conditioning system can be realized, and whether the blockage detection result is the full blockage of the system or the micro blockage of the system is also distinguished, so that the blockage detection precision of the air conditioning system is improved, the air conditioning system is conveniently and accurately protected in time, the air conditioner is prevented from being shut down due to the mistaken blockage, and the user experience is further improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for detecting a blockage in an air conditioning system according to an embodiment of the present invention;
fig. 2 is a flow chart illustrating a system micro-blocking determination according to an embodiment of the present invention;
fig. 3 is a flow chart of system full block judgment according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a device for detecting blockage in an air conditioning system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
To facilitate understanding of the present embodiment, a method for detecting a blockage of an air conditioning system according to an embodiment of the present invention will be described in detail below. The execution subject is a controller in the air conditioner, and the air conditioner further includes, but is not limited to, a compressor, an indoor coil, a detection unit, and the like, where the detection unit includes, but is not limited to, a temperature sensor, such as a first temperature sensor for detecting an outdoor ambient temperature, a second temperature sensor for detecting a discharge temperature of the compressor, and a third temperature sensor for detecting an indoor coil temperature, and the like, so that the controller detects a blockage condition of the air conditioning system according to the acquired information such as the temperature, and the setting position of each temperature sensor can be set according to a specific actual condition, which is not limited by the embodiment of the present invention.
Based on the air conditioner, an embodiment of the present invention provides a method for detecting a blockage of an air conditioning system, as shown in fig. 1, the method includes the following steps:
step S102, acquiring initial parameters of the air conditioner at the moment of starting;
wherein the initial parameters include: initial temperature T of outdoor environment Outer ring 0 Initial temperature T of compressor discharge P0 And the initial temperature T of the indoor coil Inner pipe 0 (ii) a Specifically, at the moment of starting the air conditioner, the initial temperature T of the outdoor environment is acquired by a temperature sensor Outer ring 0 Initial temperature T of compressor discharge P0 And the initial temperature T of the indoor coil Inner pipe 0 (ii) a It should be noted that, at the moment of starting the air conditioner, the initial discharge temperature of the compressor is usually close to the temperature in the outer casing, while the temperature in the outer casing of the air conditioner is related to the actual temperature, but cannot be equal to the initial temperature of the outdoor environment, so the initial discharge temperature of the compressor is usually 0 ℃ to 5 ℃ higher than the initial temperature of the outdoor environment.
Step S104, acquiring the operation parameters of the air conditioner in real time during the operation of the air conditioner;
in particular, after the air conditioner is operated, the operation parameters of the air conditioner are detected in real time,wherein the operating parameters include: ambient outdoor temperature T in operation Outer ring Compressor discharge temperature T P Indoor coil temperature T Inner pipe Compressor current I and compressor continuous run time t.
Step S106, judging whether the initial parameters and the operation parameters meet the blockage conditions or not, and generating a blockage detection result of the air conditioning system; wherein, the blockage detection result comprises system full blockage and system micro blockage.
Specifically, the blocking condition includes a micro-blocking condition and a full-blocking condition, and the judging process includes: judging whether the initial parameters and the operation parameters meet micro-plugging conditions, and if so, generating system micro-plugging; or judging whether the initial parameters and the operating parameters meet the full-blocking conditions, if so, generating the system full-blocking, thereby realizing different blocking detection results according to different blocking conditions, so as to distinguish whether the system is slightly blocked or fully blocked when the air conditioning system is blocked, and further timely and accurately entering the system blocking protection.
The process for judging whether the initial parameters and the operating parameters meet the micro-plugging conditions comprises the following steps: judging the exhaust temperature T of the compressor P Whether or not it is not less than the first preset exhaust temperature T P1 Whether the compressor current I is not less than the first preset current I 1 And indoor coil temperature T Inner tube And initial temperature T of indoor coil Inner tube 0 Whether or not the difference is not more than a first preset temperature difference Delta T 1 Summing; if yes, generating the micro-blockage of the system. Specifically, as shown in fig. 2, after the air conditioner set is started, the following conditions are determined according to the initial parameters and the operating parameters: (1) T is a unit of P ≥T P1 ；(2)I≥I 1 ；(3)|T Inner pipe -T Inner tube 0 |≤ΔT 1 (ii) a If the conditions (1) to (3) are all met, a system micro-plug or a partial plug is generated and enters an air conditioning system plug for protection, so that the service life of each device in the air conditioner is avoided, and the service life of the air conditioner is further prolonged. If not, namely at least one of the conditions (1) - (3) is not satisfied, controlling the unit to normally operate, repeatedly acquiring the operation parameters, and according to the newly acquired operation parameters and the sum of the operation parametersAnd (5) judging whether the micro-blocking condition exists again according to the initial parameters.
Wherein the first preset exhaust temperature T P1 The value range is as follows: t is not less than 110 DEG C P1 At the temperature of less than or equal to 125 ℃, a first preset current I 1 The maximum compressor current is multiplied by a coefficient A when the air conditioner normally operates, the range of the coefficient A is more than or equal to 1.1 and less than or equal to 1.3, and a first preset temperature difference delta T 1 The value range of delta T is less than or equal to 5 DEG C 1 Less than or equal to 10 ℃, in particular T P1 、I 1 And Δ T 1 The value of (c) can be set according to actual conditions.
Therefore, when the air conditioning system is partially blocked, the refrigerant circulation amount is reduced, the exhaust temperature of the compressor is increased, the running current of the compressor is increased, and the temperature difference change of the indoor coil is reduced, so that whether the system is slightly blocked can be judged according to the exhaust temperature of the compressor, the current of the compressor and the temperature change of the indoor coil, compared with the judgment of whether the air conditioning system is blocked only according to the temperature change of the indoor coil, the blockage misjudgment is avoided, and the blockage judgment precision of the air conditioning system is improved.
In addition, the operation of the air conditioner comprises heating operation and cooling operation, and the process of judging whether the initial parameters and the operation parameters meet the full-blocking condition is as follows: if the initial temperature T of outdoor environment during refrigerating operation Outer ring 0 Not less than a second preset temperature T 2 Or the initial temperature T of the outdoor environment during heating operation Outer ring 0 Not less than a third preset temperature T 3 Judging whether the continuous operation time t of the compressor of the air conditioner is not less than the first preset time t 1 (ii) a If so, when the compressor discharge temperature T of the air conditioner is higher than the preset temperature P Not more than initial discharge temperature T of compressor P0 And a preset fourth temperature difference DeltaT 4 When the sum is obtained, the system is completely blocked; or, if the outdoor environment initial temperature T is in refrigerating operation Outer ring 0 Less than a second predetermined temperature T 2 Or the initial temperature T of the outdoor environment during heating operation Outer ring 0 Less than a third predetermined temperature T 3 Judging whether the continuous running time t of the compressor of the air conditioner is not less than the second preset time t 2 (ii) a If so, when the compressor discharge temperature T of the air conditioner P Not more than initial discharge temperature T of compressor P0 And a preset fourth temperature difference DeltaT 4 And when the sum is obtained, the generation system is completely blocked.
Specifically, as shown in fig. 3, after the air conditioner set is started, according to the initial parameter and the operation parameter, T during refrigeration is determined Outer ring 0 ≥T 2 Or, during heating T Outer ring 0 ≥T 3 If both are true, i.e. for T during cooling Outer ring 0 ≥T 2 Or T in heating Outer ring 0 ≥T 3 If so, judging that the continuous operation time t of the compressor is more than or equal to t 1 (ii) a If yes, judging T P ≤T P0 +ΔT 4 If yes, generating a system full block, and if not, controlling the unit to normally operate. If the unevenness is, i.e. for T during refrigeration Outer ring 0 ＜T 2 Or T in heating Outer ring 0 ＜T 3 If so, judging that the continuous operation time t of the compressor is more than or equal to t 2 (ii) a If yes, judging T P ≤T P0 +ΔT 4 If yes, generating a system full block, and if not, controlling the unit to normally operate.
When the air conditioning system is completely blocked, the refrigerant can not circulate, no refrigerant flows through the exhaust pipe at the moment, the exhaust temperature change is small, and the difference between the exhaust temperature after the compressor operates for a period of time and the initial exhaust temperature at the moment of starting is not large, so that the air conditioning system passes through T P ≤T P0 +ΔT 4 And judging whether the air conditioning system is completely blocked. Meanwhile, the judgment mode also avoids misjudgment caused by refrigerant leakage, when the refrigerant leaks, a small amount of refrigerant circulation exists after the compressor operates, the exhaust temperature is high, the compressor operating current is low, when the system is completely blocked, the refrigerant circulation is blocked, the exhaust temperature change is small, and therefore, the delta T is set 4 The value of (2) can avoid misjudgment caused by refrigerant leakage, and improves the accuracy of system full-blocking judgment.
In addition, since the outdoor ambient temperature affects the variation speed of the discharge temperature of the compressor, the discharge temperature varies rapidly when the outdoor ambient temperature is high, and thus, it is possible to determine whether the system occurs or not according to the variation of the discharge temperature earlierFull blocking for advanced protection; when the outdoor environment temperature is low, the exhaust temperature changes slowly, and whether the system is completely blocked needs to be judged later to improve the protection accuracy, so the second preset time t is 2 Is more than the first preset time t 1 . Wherein the first predetermined time t 1 The value range of (1 min) is less than or equal to t 1 Less than or equal to 3min, and a second preset time t 2 The value range of (1) is that t is less than or equal to 3min 1 Less than or equal to 6min, second preset temperature T 2 The value range of T is more than or equal to 20 DEG C 2 At the temperature of less than or equal to 30 ℃, and the third preset temperature T 3 The value range of T is less than or equal to minus 5 DEG C 3 Less than or equal to 5 ℃, and presetting a fourth temperature difference delta T 4 The value range of (A) is more than or equal to delta T at 2 DEG C 4 Less than or equal to 15 ℃; specific t 2 、t 1 、T 2 、T 3 And Δ T 4 The value of (b) can be set according to actual conditions.
In conclusion, whether the air conditioning system is completely blocked or not is judged according to the difference value between the exhaust temperature after the compressor operates for a period of time and the initial exhaust temperature at the moment of starting. The time for judging the full blockage of the system is determined according to the outdoor environment temperature when the unit is started, if the outdoor environment temperature is high, the exhaust temperature changes rapidly, and whether the system is full blocked can be judged earlier according to the change of the exhaust temperature so as to protect in advance; when the outdoor environment temperature is low, the exhaust temperature changes slowly, whether the system is completely blocked needs to be judged later to improve the accuracy of protection, so that different times are set for different outdoor environment temperatures, the air conditioner with the system completely blocked is conveniently and accurately protected in time, the air conditioner is prevented from being stopped and protected due to mistaken blocking, and the user experience is improved.
According to the method for detecting the blockage of the air conditioning system, provided by the embodiment of the invention, the initial parameters of the air conditioner at the starting moment and the running parameters of the air conditioner in the running process are obtained; judging whether the initial parameters and the operation parameters meet the blockage conditions or not to generate a blockage detection result of the air conditioning system; the blockage detection result comprises system full blockage and system micro blockage. In the detection mode, the blockage detection of the air conditioning system can be realized, and whether the blockage detection result is the full blockage of the system or the micro blockage of the system is also distinguished, so that the blockage detection precision of the air conditioning system is improved, the air conditioning system is conveniently and accurately protected in time, the air conditioner is prevented from being shut down due to the mistaken blockage, and the user experience is further improved.
Corresponding to the above method embodiment, an embodiment of the present invention further provides a device for detecting a blockage of an air conditioning system, as shown in fig. 4, where the device includes: a first obtaining module 41, a second obtaining module 42 and a blockage judging module 43; the functions of each module are as follows:
a first obtaining module 41, configured to obtain an initial parameter at the moment when the air conditioner is started; wherein the initial parameters include: initial temperature T of outdoor environment Outer ring 0 Initial temperature T of compressor discharge P0 And the initial temperature T of the indoor coil Inner pipe 0 ；
The second obtaining module 42 is configured to obtain an operation parameter of the air conditioner in real time during operation of the air conditioner; wherein the operating parameters include: ambient outdoor temperature T during operation Outer ring Compressor discharge temperature T P Indoor coil temperature T Inner tube Compressor current I and compressor continuous run time t;
a blockage judging module 43, configured to judge whether the initial parameter and the operation parameter satisfy a blockage condition, and generate a blockage detection result of the air conditioning system; wherein, the blockage detection result comprises system full blockage and system micro blockage.
The detection device for the blockage of the air conditioning system, provided by the embodiment of the invention, can realize the blockage detection of the air conditioning system and also distinguish whether the blockage detection result is the system full blockage or the system micro blockage, so that the precision of the blockage detection of the air conditioning system is improved, the air conditioning system is conveniently and accurately protected in time, the shutdown protection of the air conditioner due to the mistaken blockage is avoided, and the experience degree of a user is further improved.
In one possible embodiment, the blocking condition includes a micro-blocking condition and a full-blocking condition, and the blocking determination module 43 is further configured to: judging whether the initial parameters and the operation parameters meet micro-plugging conditions, and if so, generating system micro-plugging; or judging whether the initial parameters and the operation parameters meet the full blocking condition, and if so, generating the system full blocking.
In another possible embodiment, the determining whether the initial parameter and the operating parameter satisfy the micro blocking condition includes: judging the exhaust temperature T of the compressor P Whether or not it is not less than the first preset exhaust temperature T P1 Whether the compressor current I is not less than the first preset current I 1 And indoor coil temperature T Inner pipe And the initial temperature T of the indoor coil Inner tube 0 Whether or not the difference is not more than a first preset temperature difference Delta T 1 Summing; if yes, generating the micro-blockage of the system.
In another possible embodiment, the first preset exhaust temperature T P1 The value range of (A) is as follows: t is not less than 110 DEG C P1 At the temperature of less than or equal to 125 ℃, a first preset current I 1 The maximum compressor current is multiplied by a coefficient A when the air conditioner normally operates, the range of the coefficient A is more than or equal to 1.1 and less than or equal to 1.3, and a first preset temperature difference delta T 1 The value range of delta T is less than or equal to 5 DEG C 1 ≤10℃。
In another possible embodiment, the operation of the air conditioner includes a heating operation and a cooling operation, and the determining whether the initial parameter and the operation parameter satisfy the full blocking condition includes: if the initial temperature T of the outdoor environment during cooling operation Outer ring 0 Not less than a second preset temperature T 2 Or the initial temperature T of the outdoor environment during heating operation Outer ring 0 Not less than a third preset temperature T 3 Judging whether the continuous operation time t of the compressor of the air conditioner is not less than the first preset time t 1 (ii) a If so, when the compressor discharge temperature T of the air conditioner P Not more than initial discharge temperature T of compressor P0 And a preset fourth temperature difference DeltaT 4 And when the sum is obtained, the generation system is completely blocked.
In another possible embodiment, the above determining whether the initial parameter and the operating parameter satisfy the full blocking condition further includes: if the initial temperature T of outdoor environment during refrigerating operation Outer ring 0 Less than a second predetermined temperature T 2 Or the initial temperature T of the outdoor environment during heating operation Outer ring 0 Less than a third preset temperature T 3 Judging whether the continuous running time t of the compressor of the air conditioner is not less than the second preset time t 2 (ii) a If so, when the compressor discharge temperature T of the air conditioner P Not more than initial temperature T of compressor exhaust P0 And a preset fourth temperature difference DeltaT 4 And when the sum is obtained, the generation system is completely blocked.
In another possible embodiment, the second preset time t 2 Is more than the first preset time t 1 Wherein the first preset time t 1 The value range of (1 min) is less than or equal to t 1 Less than or equal to 3min, a second preset time t 2 The value range of (1) is that t is less than or equal to 3min 1 Less than or equal to 6min, second preset temperature T 2 The value range of T is more than or equal to 20 DEG C 2 At the temperature of less than or equal to 30 ℃, and the third preset temperature T 3 The value range of T is less than or equal to minus 5 DEG C 3 Less than or equal to 5 ℃, and presetting a fourth temperature difference delta T 4 The value range of (A) is more than or equal to delta T at 2 DEG C 4 ≤15℃。
The device for detecting the blockage of the air conditioning system provided by the embodiment of the invention has the same technical characteristics as the method for detecting the blockage of the air conditioning system provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The embodiment of the invention also provides an air conditioner, which comprises a processor and a memory, wherein the memory stores machine executable instructions capable of being executed by the processor, and the processor executes the machine executable instructions to realize the method for detecting the blockage of the air conditioning system.
Referring to fig. 5, the air conditioner includes a processor 50 and a memory 51, the memory 51 stores machine executable instructions capable of being executed by the processor 50, and the processor 50 executes the machine executable instructions to implement the above-mentioned method for detecting the blockage of the air conditioning system.
Further, the air conditioner shown in fig. 5 further includes a bus 52 and a communication interface 53, and the processor 50, the communication interface 53 and the memory 51 are connected through the bus 52.
The Memory 51 may include a Random Access Memory (RAM) and a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 53 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used. The bus 52 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Enhanced Industry Standard Architecture) bus, or the like. The above-mentioned buses may be classified into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
The processor 50 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 50. The Processor 50 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, etc. as is well known in the art. The storage medium is located in the memory 51, and the processor 50 reads the information in the memory 51 and completes the steps of the method of the foregoing embodiment in combination with the hardware thereof.
The present embodiments also provide a machine-readable storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement the above-described method of detecting a blockage in an air conditioning system.
The method and the device for detecting blockage of an air conditioning system and the computer program product of an air conditioner provided by the embodiments of the present invention include a computer readable storage medium storing program codes, instructions included in the program codes may be used to execute the method described in the foregoing method embodiments, and specific implementation may refer to the method embodiments, which are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A method of detecting a blockage in an air conditioning system, the method comprising:
acquiring initial parameters of the air conditioner at the starting moment; wherein the initial parameters include: initial temperature T of outdoor environment Outer ring 0 Initial temperature T of compressor discharge P0 And the initial temperature T of the indoor coil Inner tube 0 ；
Acquiring the operation parameters of the air conditioner in real time during the operation of the air conditioner; wherein the operating parameters include: ambient outdoor temperature T during operation Outer ring Compressor discharge temperature T P Indoor coil temperature T Inner tube Compressor current I and compressor continuous run time t;
judging whether the initial parameters and the operation parameters meet the blockage conditions or not, and generating a blockage detection result of the air-conditioning system; wherein the blockage detection result comprises system full blockage and system micro blockage;
the method comprises the following steps of judging whether an initial parameter and an operation parameter meet a blockage condition or not, and generating a blockage detection result of the air-conditioning system, wherein the blockage condition comprises a micro-blockage condition and a full-blockage condition, and the steps of: judging whether the initial parameters and the operation parameters meet the micro-plugging condition, if so, generating the system micro-plugging; or, judging whether the initial parameters and the operation parameters meet the full blocking condition, if so, generating the system full blocking;
the operation of the air conditioner comprises heating operation and cooling operation, and the step of judging whether the initial parameters and the operation parameters meet the full blocking condition comprises the following steps: if the initial temperature T of the outdoor environment during the refrigerating operation Outer ring 0 Not less than a second preset temperature T 2 Or the initial temperature T of the outdoor environment during heating operation Outer ring 0 Not less than a third preset temperature T 3 Judging whether the continuous running time t of the compressor of the air conditioner is not less than a first preset time t 1 (ii) a If yes, when the compressor discharge temperature T of the air conditioner is higher than the preset temperature T P Not more than the initial discharge temperature T of the compressor P0 And a preset fourth temperature difference DeltaT 4 And when the sum is obtained, generating the system full block.
2. The method of claim 1, wherein said step of determining whether said initial parameter and said operational parameter satisfy said micro-plugging condition comprises:
judging the exhaust temperature T of the compressor P Whether or not it is not less than the first preset exhaust temperature T P1 Whether the current I of the compressor is not less than a first preset current I 1 And said indoor coil temperature T Inner tube And the initial temperature T of the indoor coil Inner pipe 0 Whether or not the difference is not more than a first preset temperature difference Delta T 1 Summing;
and if the number of the micro-plugs is equal to the number of the micro-plugs, generating the micro-plugs of the system.
3. Method according to claim 2, characterized in that the first preset exhaust gas temperature T P1 The value range is as follows: t is not less than 110 DEG C P1 At most 125 ℃, the first preset current I 1 Multiplying the highest compressor current by a coefficient A when the air conditioner normally operates, wherein the range of the coefficient A is more than or equal to 1.1 and less than or equal to 1.3, and the first preset temperature difference delta T 1 The value range of delta T is less than or equal to 5 DEG C 1 ≤10℃。
4. The method of claim 1, wherein the step of determining whether the initial parameter and the operating parameter satisfy the full blockage condition further comprises:
if the initial temperature T of the outdoor environment during the refrigeration operation Outer ring 0 Less than a second predetermined temperature T 2 Or, the initial temperature T of the outdoor environment during the heating operation Outer ring 0 Less than a third predetermined temperature T 3 Judging whether the continuous running time t of the compressor of the air conditioner is not less than a second preset time t 2 ；
If yes, when the compressor discharge temperature T of the air conditioner is higher than the preset temperature T P Not more than the initial discharge temperature T of the compressor P0 And a preset fourth temperature difference DeltaT 4 And when the sum is obtained, generating the system full block.
5. Method according to claim 4, characterized in that said second preset time t 2 Is greater than the first preset time t 1 Wherein the first preset time t 1 The value range of (1 min) is less than or equal to t 1 Not more than 3min, the second preset time t 2 The value range of (1) is that t is less than or equal to 3min 2 Less than or equal to 6min, the second preset temperature T 2 The value range of T is more than or equal to 20 DEG C 2 At most 30 ℃, and the third preset temperature T 3 The value range of T is less than or equal to minus 5 DEG C 3 Not more than 5 ℃, and presetting a fourth temperature difference delta T 4 The value range of delta T is not less than 2 DEG C 4 ≤15℃。
6. An apparatus for detecting a blockage in an air conditioning system, the apparatus comprising:
the first acquisition module is used for acquiring initial parameters at the moment of starting the air conditioner; wherein the initial parameters include: initial temperature T of outdoor environment Outer ring 0 Initial temperature T of compressor discharge P0 And the initial temperature T of the indoor coil Inner tube 0 ；
The second acquisition module is used for acquiring the operation parameters of the air conditioner in real time during the operation of the air conditioner; wherein the operating parameters include: ambient outdoor temperature T in operation Outer ring Compressor discharge temperature T P Indoor coil temperature T Inner pipe Compressor current I and compressor continuous run time t;
the blockage judging module is used for judging whether the initial parameters and the operation parameters meet the blockage conditions or not and generating a blockage detection result of the air conditioning system; wherein the blockage detection result comprises system full blockage and system micro blockage;
wherein, the jam condition includes little stifled condition and full stifled condition, jam judgement module is used for: judging whether the initial parameters and the operating parameters meet the micro-blocking condition, and if so, generating the system micro-blocking; or judging whether the initial parameters and the operation parameters meet the full blocking condition, and if so, generating the system full blocking;
the operation of the air conditioner comprises heating operation and cooling operation, and the judging whether the initial parameters and the operation parameters meet the full-blocking condition comprises the following steps: if the initial temperature T of the outdoor environment during the refrigeration operation Outer ring 0 Not less than a second preset temperature T 2 Or is orAn initial temperature T of an outdoor environment during the heating operation Outer ring 0 Not less than a third preset temperature T 3 Judging whether the continuous running time t of the compressor of the air conditioner is not less than a first preset time t 1 (ii) a If yes, when the compressor discharge temperature T of the air conditioner is higher than the preset temperature T P Not more than the initial discharge temperature T of the compressor P0 And a preset fourth temperature difference DeltaT 4 And when the sum is obtained, generating the system full block.
7. An air conditioner comprising a memory, a processor and a computer program stored on said memory and executable on said processor, wherein said processor when executing said computer program performs the steps of the method of any of claims 1 to 5.
8. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, is adapted to carry out the steps of the method according to any of the claims 1-5.
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CN110779160A (en) * 2019-11-12 2020-02-11 广州华凌制冷设备有限公司 Operation control method and device, air conditioner and storage medium

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CN107461883A (en) * 2017-07-27 2017-12-12 广东美的制冷设备有限公司 Detection method, the system that air conditioner and its throttling arrangement block
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