CN115218341A - Method and device for detecting state of air conditioner refrigerant and storage medium - Google Patents

Method and device for detecting state of air conditioner refrigerant and storage medium Download PDF

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Publication number
CN115218341A
CN115218341A CN202210749894.9A CN202210749894A CN115218341A CN 115218341 A CN115218341 A CN 115218341A CN 202210749894 A CN202210749894 A CN 202210749894A CN 115218341 A CN115218341 A CN 115218341A
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Prior art keywords
air conditioner
air
determining
actual
enthalpy difference
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程竹
单联瑜
吴俊鸿
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software 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
    • 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
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • 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
    • 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 disclosure relates to a method and a device for detecting the state of an air conditioner refrigerant and a storage medium. The method for detecting the state of the air conditioner refrigerant comprises the following steps: obtaining working parameters of the air conditioner, and determining an expected heat exchange capacity value of the air conditioner according to the working parameters; determining the actual air inlet and outlet enthalpy difference of the air conditioner, and determining the expected air inlet and outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value; and determining the state of the refrigerant of the air conditioner according to the actual air inlet-outlet enthalpy difference and the expected air inlet-outlet enthalpy difference. Through the method and the device, the detection accuracy of the refrigerant can be improved.

Description

Method and device for detecting state of air conditioner refrigerant and storage medium
Technical Field
The present disclosure relates to the field of air conditioner control, and in particular, to a method and an apparatus for detecting a state of a refrigerant of an air conditioner, and a storage medium.
Background
Air conditioners are used more and more commonly in daily life, and the control of the air conditioners is also continuously optimized. Among them, the detection of whether the content of the air conditioning refrigerant (for example, fluorine) is in a normal state is an important study.
In the related art, whether the air conditioner enters the protection of the refrigerant abnormal state (the content is lower than the threshold) is determined by the difference between the temperature of the coil of the indoor unit and the ambient temperature of the indoor side. However, the detection of the refrigerant state by this method is not accurate and the risk of false protection is high.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a method, an apparatus, and a storage medium for detecting a state of a refrigerant of an air conditioner.
According to a first aspect of the embodiments of the present disclosure, there is provided a method for detecting a state of a refrigerant of an air conditioner, including: obtaining working parameters of the air conditioner, and determining an expected heat exchange capacity value of the air conditioner according to the working parameters; determining the actual air inlet and outlet enthalpy difference of the air conditioner, and determining the expected air inlet and outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value; and determining the state of the refrigerant of the air conditioner according to the actual air inlet-outlet enthalpy difference and the expected air inlet-outlet enthalpy difference.
In one embodiment, the determining the refrigerant state of the air conditioner according to the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference comprises: determining a difference between the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference; if the difference value is larger than or equal to a preset threshold value, determining that the state of the refrigerant of the air conditioner is an abnormal state; and if the difference is smaller than the preset threshold value, determining that the state of the refrigerant of the air conditioner is a normal state.
In yet another embodiment, the determining an expected air inlet and outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value comprises: determining the air mass flow passing through the air conditioner, wherein the air mass flow is determined based on the attribute information of the circulating fan in the air conditioner; and determining the ratio of the expected heat exchange capacity value to the air mass flow as the expected air inlet and outlet enthalpy difference of the air conditioner.
In yet another embodiment, the determining the mass air flow through the air conditioner includes: determining an air quantity characteristic parameter of the internal circulation fan based on the structural attribute of the internal circulation fan; determining an actual rotating speed correction parameter of the internal circulating fan based on the actual rotating speed of the internal circulating fan of the air conditioner; and taking the product of the actual rotating speed correction parameter of the internal circulation fan, the air quantity characteristic parameter and the air density as the mass flow of the air flowing through the air conditioner.
In another embodiment, the obtaining the operating parameter of the air conditioner and determining the expected heat exchange capacity value of the air conditioner according to the operating parameter includes: acquiring the operating frequency, the wind level, the outdoor environment temperature, the indoor environment temperature and the heat exchange capacity value coefficient of the air conditioner; determining a first wind gear correction coefficient according to the wind gear, determining a second wind gear correction coefficient according to the outdoor environment temperature, and determining a third wind gear correction coefficient according to the indoor environment temperature; and fitting the operating frequency, the first gear correction coefficient, the second gear correction coefficient, the third gear correction coefficient and the heat exchange capacity value coefficient to obtain an expected heat exchange capacity value of the air conditioner.
In another embodiment, the determining the actual difference in air inlet and outlet enthalpy of the air conditioner comprises: determining an operating mode of the air conditioner, wherein the operating mode comprises a cooling mode or a heating mode; and determining the actual air inlet and outlet enthalpy difference of the air conditioner based on the working mode.
In another embodiment, the determining the actual air inlet and outlet enthalpy difference of the air conditioner based on the operation mode includes: and if the working mode of the air conditioner is a refrigeration mode, determining the actual inlet and outlet air enthalpy difference of the air conditioner according to the difference value of the outlet air enthalpy value of the indoor unit of the air conditioner and the inlet air enthalpy value of the indoor unit of the air conditioner.
In another embodiment, the determining the actual air inlet and outlet enthalpy difference of the air conditioner based on the operation mode includes: and if the working mode of the air conditioner is a heating mode, determining the actual air inlet and outlet enthalpy difference of the air conditioner according to the difference between the air outlet enthalpy value of the indoor unit of the air conditioner and the air inlet enthalpy value of the indoor unit of the air conditioner, or determining the actual air inlet and outlet enthalpy difference of the air conditioner according to the temperature of an air outlet of the air conditioner and the temperature of the indoor environment.
According to a second aspect of an embodiment of the present disclosure, there is provided an apparatus for detecting a state of a refrigerant of an air conditioner, comprising: the acquisition unit is used for acquiring working parameters of the air conditioner; and the processing unit is used for determining an expected heat exchange capacity value of the air conditioner according to the working parameters, determining an actual air inlet and outlet enthalpy difference of the air conditioner, determining an expected air inlet and outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value, and determining a refrigerant state of the air conditioner according to the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference.
In one embodiment, the processing unit determines the refrigerant state of the air conditioner according to the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference by adopting the following modes: determining a difference between the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference; if the difference value is larger than or equal to a preset threshold value, determining that the state of the refrigerant of the air conditioner is an abnormal state; and if the difference is smaller than the preset threshold value, determining that the state of the refrigerant of the air conditioner is a normal state.
In another embodiment, the processing unit determines the expected difference in enthalpy of air inlet and outlet of the air conditioner according to the expected heat exchange capacity value by the following method: determining the air mass flow passing through the air conditioner, wherein the air mass flow is determined based on the attribute information of the circulating fan in the air conditioner; and determining the ratio of the expected heat exchange capacity value to the air mass flow as the expected air inlet and outlet enthalpy difference of the air conditioner.
In another embodiment, the processing unit determines the mass air flow through the air conditioner as follows: determining an air quantity characteristic parameter of the internal circulation fan based on the structural attribute of the internal circulation fan; determining an actual rotating speed correction parameter of the internal circulation fan of the air conditioner based on the actual rotating speed of the internal circulation fan of the air conditioner; and taking the product of the actual rotating speed correction parameter of the internal circulation fan, the air quantity characteristic parameter and the air density as the mass flow of the air flowing through the air conditioner.
In another embodiment, the obtaining unit obtains the operating parameters of the air conditioner as follows: acquiring the operating frequency, the wind level, the outdoor environment temperature, the indoor environment temperature and the heat exchange capacity value coefficient of the air conditioner; the processing unit determines an expected heat exchange capacity value of the air conditioner according to the working parameters in the following way: determining a first air gear correction coefficient according to the air gear, determining a second air gear correction coefficient according to the outdoor environment temperature, and determining a third air gear correction coefficient according to the indoor environment temperature; and fitting the operating frequency, the first gear correction coefficient, the second gear correction coefficient, the third gear correction coefficient and the heat exchange capacity value coefficient to obtain an expected heat exchange capacity value of the air conditioner.
In another embodiment, the processing unit determines the actual air inlet and outlet enthalpy difference of the air conditioner by the following method: determining an operating mode of the air conditioner, wherein the operating mode comprises a cooling mode or a heating mode; and determining the actual air inlet and outlet enthalpy difference of the air conditioner based on the working mode.
In another embodiment, the processing unit determines the actual air inlet and outlet enthalpy difference of the air conditioner based on the operating mode as follows: and if the working mode of the air conditioner is a refrigeration mode, determining the actual inlet and outlet air enthalpy difference of the air conditioner according to the difference value of the outlet air enthalpy value of the indoor unit of the air conditioner and the inlet air enthalpy value of the indoor unit of the air conditioner.
In another embodiment, the processing unit determines the actual air inlet and outlet enthalpy difference of the air conditioner based on the operating mode as follows: and if the working mode of the air conditioner is a heating mode, determining the actual air inlet and outlet enthalpy difference of the air conditioner according to the difference between the air outlet enthalpy value of the indoor unit of the air conditioner and the air inlet enthalpy value of the indoor unit of the air conditioner, or determining the actual air inlet and outlet enthalpy difference of the air conditioner according to the temperature of an air outlet of the air conditioner and the temperature of the indoor environment.
According to a third aspect of the embodiments of the present disclosure, there is provided an apparatus for detecting a state of a refrigerant of an air conditioner, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: the method for detecting the state of the air conditioner refrigerant in the first aspect or any one of the embodiments of the first aspect is implemented.
According to a fourth aspect of embodiments of the present disclosure, there is provided a storage medium, wherein the storage medium has instructions stored therein, and when the instructions in the storage medium are executed by a processor of a terminal, the terminal including the processor is enabled to execute the method for detecting the state of the air conditioning refrigerant in the first aspect or any one of the embodiments of the first aspect.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the method comprises the steps of obtaining an expected air inlet and outlet enthalpy difference of the air conditioner based on an expected heat exchange capacity value by detecting an expected heat exchange capacity value of the air conditioner, and determining an actual air inlet and outlet enthalpy difference of the air conditioner. Because the expected air inlet and outlet enthalpy difference can represent the expected refrigerant content of the air conditioner, and the actual air inlet and outlet enthalpy difference can represent the actual refrigerant content of the air conditioner, the state of the air conditioner refrigerant is detected based on the expected air inlet and outlet enthalpy difference and the actual air inlet and outlet enthalpy difference of the air conditioner, and the accuracy of detecting the state of the air conditioner refrigerant can be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flowchart illustrating a method of detecting a state of an air conditioner refrigerant according to an exemplary embodiment.
Figure 2 is a flow chart illustrating a method of determining a refrigerant condition of an air conditioner based on an actual air inlet and outlet enthalpy difference and an expected air inlet and outlet enthalpy difference, according to an exemplary embodiment.
Fig. 3 is a flow chart illustrating a method of determining an expected difference in inlet and outlet enthalpy of an air conditioner based on an expected heat transfer capacity value, according to an exemplary embodiment.
FIG. 4 is a flow chart illustrating a method of determining a mass flow of air through an air conditioner in accordance with an exemplary embodiment.
Fig. 5 is a flowchart illustrating a method of acquiring operating parameters of an air conditioner and determining an expected heat exchange capacity value of the air conditioner according to the operating parameters, according to an exemplary embodiment.
Fig. 6 is a flow chart illustrating a method of determining an actual air inlet and outlet enthalpy difference of an air conditioner according to an exemplary embodiment.
Fig. 7 is a flow chart illustrating a method for determining an actual air inlet and outlet enthalpy difference of an air conditioner based on an operation mode according to an exemplary embodiment.
Fig. 8 is a flowchart illustrating a method of determining an actual air inlet and outlet enthalpy difference of an air conditioner based on an operation mode according to an exemplary embodiment.
Fig. 9 is a block diagram illustrating an apparatus for detecting a state of refrigerant of an air conditioner according to an exemplary embodiment.
Fig. 10 is a block diagram illustrating an apparatus for detecting a state of an air conditioner refrigerant according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure.
In the related art, most schemes for detecting the state of the refrigerant of the air conditioner judge whether the heat exchange capacity value of the air conditioner is in a normal state or not by determining the difference between the temperature sensor of the built-in heat exchanger of the air conditioner and the temperature of the indoor environment, namely whether the state of the refrigerant of the air conditioner is in a normal state or not. For example: and judging whether the air conditioner enters fluorine-lacking protection or not according to the difference between the temperature of the coil pipe of the indoor unit and the ambient temperature at the indoor side.
However, when the temperature of the indoor heat exchanger is detected, the method for detecting the state of the air-conditioning refrigerant is influenced by the position of the sensor, and has a large error. Meanwhile, when the air conditioner is in a relatively extreme environment, for example, the outdoor temperature is greater than 35 degrees celsius or the outdoor temperature is less than minus 10 degrees celsius, in order to prevent the air conditioner from being mistakenly protected, the threshold for detecting the abnormal state of the air conditioner refrigerant is usually set to be high, for example, more than 50% of the air conditioner refrigerant is absent to detect that the state of the air conditioner refrigerant is an abnormal state. However, when the air conditioner refrigerant is reduced by 20% to 30%, the cooling effect or the heating effect of the air conditioner is greatly affected.
The disclosure provides a method for detecting the state of a refrigerant of an air conditioner, which improves the timeliness and accuracy of the detection capability of the air conditioner lacking the refrigerant by detecting the state of the refrigerant of the air conditioner.
Fig. 1 is a flowchart illustrating a method of detecting a state of an air conditioning refrigerant according to an exemplary embodiment, and as shown in fig. 1, the method of detecting a state of an air conditioning refrigerant includes the following steps.
In step S11, the operating parameters of the air conditioner are obtained, and the expected heat exchange capacity value of the air conditioner is determined according to the operating parameters.
In the embodiment of the present disclosure, the operating parameters of the air conditioner may include an operating frequency of a compressor of the air conditioner, a windshield, an outdoor ambient temperature, an indoor ambient temperature, and the like.
In the embodiment of the present disclosure, the expected heat exchange value of the air conditioner may be an expected cooling capacity value or a heating capacity value of the air conditioner, that is, a degree of changing the internal energy of the air per unit time.
In step S12, the actual air inlet and outlet enthalpy difference of the air conditioner is determined, and the expected air inlet and outlet enthalpy difference of the air conditioner is determined according to the expected heat exchange capacity value.
In the embodiment of the disclosure, the actual air inlet and outlet enthalpy value of the air conditioner is determined according to the actual air inlet enthalpy value and the actual air outlet enthalpy value of the air conditioner. And determining the expected air inlet and outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value. Wherein the expected air inlet and outlet enthalpy difference of the air conditioner is related to the air mass flow.
In step S13, the refrigerant state of the air conditioner is determined based on the actual enthalpy difference and the expected enthalpy difference.
In the embodiment of the disclosure, the relation between the actual air inlet/outlet enthalpy difference and the expected air inlet/outlet enthalpy difference of the air conditioner is determined, and whether the actual heat exchange capacity value of the air conditioner reaches the expected heat exchange capacity value can be obtained. And determining the current state of the refrigerant of the air conditioner according to the relation between the actual heat exchange capacity value and the expected heat exchange capacity value of the air conditioner.
The method for detecting the state of the air-conditioning refrigerant provided by the disclosure obtains the expected air inlet and outlet enthalpy difference of the air conditioner by detecting the expected heat exchange capacity of the air conditioner, judges the relation between the expected air inlet and outlet enthalpy difference of the air conditioner and the actual air inlet and outlet enthalpy difference, and detects whether the air-conditioning refrigerant is in an abnormal state. According to the method for detecting the state of the air conditioner refrigerant, the temperature detected by the temperature sensor of the built-in heat exchanger of the air conditioner is not depended on, and the method is insensitive to errors caused by the influence of the position of the sensor when the temperature of the indoor side heat exchanger is detected.
The following embodiments of the present disclosure further explain and explain the method for determining the refrigerant state of the air conditioner according to the actual and expected enthalpy difference of air inlet and outlet in the above embodiments of the present disclosure.
Fig. 2 is a flow chart illustrating a method for determining a refrigerant state of an air conditioner based on an actual air inlet and outlet enthalpy difference and an expected air inlet and outlet enthalpy difference according to an exemplary embodiment, wherein the method for determining the refrigerant state of the air conditioner based on the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference, as shown in fig. 2, comprises the following steps.
In step S21, a difference between the actual air inlet/outlet enthalpy difference and the expected air inlet/outlet enthalpy difference is determined.
In the embodiment of the disclosure, the difference between the actual enthalpy difference of the air inlet and the air outlet and the expected enthalpy difference of the air inlet and the air outlet can be used as a standard to measure the difference between the actual heat exchange capacity value and the expected heat exchange capacity value of the air conditioner.
In step S22a, if the difference is greater than or equal to the preset threshold, it is determined that the refrigerant state of the air conditioner is an abnormal state.
In the embodiment of the present disclosure, it may be determined that a difference between an actual heat exchange capacity value and an expected heat exchange capacity value of the air conditioner is greater than a preset heat exchange capacity threshold value. The preset heat exchange capacity value threshold may be a difference between an actual heat exchange capacity value of the air conditioner and an expected heat exchange capacity value of the air conditioner.
In the embodiment of the present disclosure, the preset threshold may be obtained according to a previous experiment. For example, when the air conditioner lacks 20% of refrigerant, the difference between the actual enthalpy difference and the expected enthalpy difference of the air inlet and outlet respectively corresponding to the actual heat exchange capacity value and the expected heat exchange capacity value of the air conditioner can be set as the preset threshold.
In the embodiment of the disclosure, if the difference between the actual enthalpy difference of the air inlet and the air outlet and the expected enthalpy difference of the air inlet and the air outlet is greater than or equal to the preset threshold, it may be determined that the air-conditioning refrigerant reaches the threshold of refrigerant shortage, for example, the refrigerant shortage reaches 20%. And determining that the current refrigerator state is in an abnormal state.
In step S22b, if the difference is smaller than the preset threshold, it is determined that the refrigerant state of the air conditioner is a normal state.
In the embodiment of the disclosure, if the difference between the actual enthalpy difference of the inlet air and the outlet air and the expected enthalpy difference of the inlet air and the outlet air is smaller than the preset threshold, it may be determined that the difference between the actual heat exchange capacity value of the air conditioner and the expected heat exchange capacity value is within the preset threshold range, that is, the actual heat exchange capacity value of the air conditioner does not reach the threshold value of lack of the refrigerant, for example, the refrigerant does not lack 20%. And determining that the current refrigerator state is in a normal state.
The method for determining the state of the refrigerant of the air conditioner according to the actual enthalpy difference of the air inlet and the air outlet and the expected enthalpy difference of the air inlet and the air outlet obtains the relation between the actual heat exchange capacity value and the expected heat exchange capacity value of the air conditioner according to the size relation between the difference value between the actual enthalpy difference of the air inlet and the air outlet and the expected enthalpy difference of the air inlet and the air outlet and the preset threshold, and judges whether the actual heat exchange capacity value of the air conditioner can reach the heat exchange capacity value when the air conditioner lacks a certain amount of refrigerant. By the method, the preset threshold value can be set lower than that of the prior art, namely the protection threshold value for the lack of the refrigerant of the air conditioner is lower, and the abnormal state can be detected when the reduction of the refrigerant is less. Meanwhile, the risk of air conditioner error protection is lower.
The following embodiments of the present disclosure further explain and explain a method for determining an expected difference in enthalpy of air inlet and outlet air of an air conditioner according to an expected heat exchange capacity value in the above embodiments of the present disclosure.
Fig. 3 is a flowchart illustrating a method of determining an expected difference in enthalpy of air inlet and outlet air of an air conditioner based on an expected heat transfer capacity value according to an exemplary embodiment, and the method of determining an expected difference in enthalpy of air inlet and outlet air of an air conditioner based on an expected heat transfer capacity value, as shown in fig. 3, includes the following steps.
In step S31, the air mass flow rate flowing through the air conditioner is determined, and the air mass flow rate is determined based on the attribute information of the circulating fan in the air conditioner.
In the embodiment of the disclosure, the expected air inlet and outlet enthalpy difference of the air conditioner is determined, the flow rate of air flowing through the air conditioner needs to be determined, but the air flowing through the air conditioner also has certain quality, and in order to make the expected air inlet and outlet enthalpy difference of the air conditioner as accurate as possible, the expected air inlet and outlet enthalpy difference of the air conditioner is calculated by adopting the mass flow rate of the air flowing through the air conditioner.
In step S32, the ratio between the expected heat exchange capacity value and the air mass flow is determined as the expected difference in the inlet and outlet enthalpy of the air conditioner.
In the embodiment of the disclosure, the expected air inlet and outlet enthalpy difference of the air conditioner can be an energy difference when a certain mass of air is changed from a first temperature to a second temperature. And determining the expected heat exchange capacity value and the air mass flow, so that the energy difference of the air when the unit mass of the air is changed from the first temperature to the second temperature by the air conditioner can be obtained, namely the expected air inlet and outlet enthalpy difference of the air conditioner.
According to the method for determining the expected air inlet and outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value, the expected heat exchange capacity of the air conditioner is obtained through the mass flow of air flowing through the air conditioner and the expected heat exchange capacity of the air conditioner.
The following embodiments of the present disclosure further explain and explain the method of determining a mass flow rate of air flowing through an air conditioner in the above embodiments of the present disclosure.
Fig. 4 is a flowchart illustrating a method of determining a mass air flow through an air conditioner, according to an exemplary embodiment, as shown in fig. 4, the method of determining the mass air flow through the air conditioner includes the following steps.
In step S41, an air volume characteristic parameter of the internal circulation fan is determined based on the structural attribute of the internal circulation fan.
In the embodiment of the disclosure, the air volume characteristic parameter of the air conditioner may be related to parameters such as an air duct of an indoor unit of the air conditioner, the size of an internal circulation fan, the specification of an internal circulation motor, and the like, that is, related to the structural attribute of the air conditioner. The air conditioner air volume characteristic parameters can be measured through standard tests under a standard environment, namely that the outdoor temperature is between minus 5 ℃ and 35 ℃. The air-conditioning air volume characteristic parameter can take the value of 500 cubic meters per hour to 1300 cubic meters per hour.
In step S42, an actual rotation speed correction parameter of the internal circulation fan of the air conditioner is determined based on the actual rotation speed of the internal circulation fan.
In the embodiment of the disclosure, the actual rotation speed correction coefficient of the internal circulation fan of the air conditioner may be related to the rotation speed of the air conditioner. For example, the actual rotational speed of the internal circulation fan of the air conditioner may be a ratio of the actual operating rotational speed of the air conditioner to 1430, wherein 1430 may be a coefficient previously measured under a standard environment.
In step S43, the product of the actual rotation speed correction coefficient of the internal circulation fan, the air volume characteristic parameter and the air density is used as the mass flow of air flowing through the air conditioner.
In the embodiment of the disclosure, the mass flow of air flowing through the air conditioner may be a product of an air quantity characteristic parameter of the air conditioner, an actual rotating speed correction coefficient of an internal circulation fan of the air conditioner, and the density of the air. Wherein the air density may be 1.29 kilograms per cubic meter. The air mass flow rate of the air conditioner can be obtained by correcting the air speed, namely the volume of the air flowing through the air conditioner per hour and multiplying the air volume by the air density.
According to the method for determining the air mass flow of the air conditioner, the product of the air volume flow and the density of the air flowing through the indoor heat exchanger of the air conditioner is the air mass flow, the characteristic parameters can be extracted based on the air conditioner structure, and the air volume flow can be simply calculated according to the rotating speed of the indoor circulating fan motor. The process of calculating the air mass flow is simplified, and the air mass flow of the air conditioner can be calculated conveniently by a user or a maintenance person.
The following embodiments of the present disclosure further explain and explain methods of obtaining operating parameters of an air conditioner and determining an expected heat exchange capacity value of the air conditioner according to the operating parameters in the above embodiments of the present disclosure.
Fig. 5 is a flowchart illustrating a method of acquiring operating parameters of an air conditioner and determining an expected value of heat exchange capacity of the air conditioner according to the operating parameters, according to an exemplary embodiment, and as shown in fig. 5, the method of determining the expected value of heat exchange capacity of the air conditioner includes the following steps.
In step S51, the operating frequency, the wind level, the outdoor ambient temperature, the indoor ambient temperature, and the heat exchange capacity value coefficient of the air conditioner are acquired.
In the embodiment of the present disclosure, the operating frequency of the air conditioner may be a frequency of an air conditioner compressor. The wind shield is an air conditioner gear preset by a user. The outdoor ambient temperature and the indoor ambient temperature can be measured by a temperature sensor of the air conditioner. The heat transfer capacity value factor may be a factor measured under standard circumstances, such as 42 watts per hertz.
In step S52, a first damper correction factor is determined according to the damper, a second damper correction factor is determined according to the outdoor ambient temperature, and a third damper correction factor is determined according to the indoor ambient temperature.
In the embodiment of the present disclosure, the first gear correction coefficient may be related to a gear value, where the gear value may be 1 to 7. And determining a first wind gear correction coefficient according to the wind gear value.
In the disclosed embodiment, the second gear correction factor may be related to the outdoor ambient temperature. The third gear correction factor may be related to the indoor ambient temperature. And determining a second wind gear correction coefficient and a third wind gear correction coefficient according to the outdoor environment temperature and the indoor environment temperature.
In step S53, the expected heat exchange capability value of the air conditioner is obtained by fitting the operating frequency, the first gear correction coefficient, the second gear correction coefficient, the third gear correction coefficient, and the heat exchange capability value coefficient.
In an embodiment of the present disclosure, the expected heat exchange capacity value of the air conditioner may be a product of the operating frequency and a heat exchange capacity value coefficient, a first gear correction coefficient, a second gear correction coefficient, and a third gear correction coefficient.
For example, q represents an expected heat exchange capacity value of the air conditioner, F represents an operating frequency, θ represents a heat exchange capacity value coefficient, a1 represents a first gear correction coefficient, a2 represents a second gear correction coefficient, and a3 represents a third gear correction coefficient.
The expected heat exchange capacity value q of the air conditioner may be expressed as: q = F θ a1 a 2a 3.
According to the method for determining the expected heat exchange capacity value of the air conditioner, the expected heat exchange capacity value of the air conditioner is obtained by fitting the air conditioner running frequency with the expected heat exchange capacity value coefficient and the wind gear correction coefficient of the air conditioner.
The following embodiments of the present disclosure further explain and explain the method for determining the actual air inlet and outlet enthalpy difference of the air conditioner in the above embodiments of the present disclosure.
Fig. 6 is a flowchart illustrating a method of determining an actual air inlet and outlet enthalpy difference of an air conditioner according to an exemplary embodiment, and as shown in fig. 6, the method of determining the actual air inlet and outlet enthalpy difference of the air conditioner includes the following steps.
In step S61, an operation mode of the air conditioner is determined, and the operation mode includes a cooling mode or a heating mode.
In the embodiment of the present disclosure, the operation mode of the air conditioner may be divided into two modes, i.e., cooling and heating. In the refrigeration mode, the air conditioner compressor compresses the gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, and then the gaseous refrigerant is sent to a condenser (an air conditioner outdoor unit) to be cooled into a normal-temperature high-pressure liquid refrigerant, namely hot air is blown out of the air conditioner outdoor unit. Then the refrigerant enters an evaporator (an air conditioner indoor unit) through a throttling element (a capillary tube and an electronic expansion valve), the space is suddenly increased after the refrigerant reaches the evaporator from the throttling element, the pressure is reduced, the liquid refrigerant is vaporized and changed into the gaseous low-temperature refrigerant, so that a large amount of heat is absorbed, the evaporator is cooled, the indoor air is blown by a fan of the indoor unit from the evaporator, and the air is cooled by the air conditioner indoor unit.
In the embodiment of the disclosure, a component called a four-way valve is arranged in a heating mode, so that the flowing directions of the refrigerant in the condenser and the evaporator are opposite to the flowing direction of the refrigerant in the cooling process, cold air is blown outdoors in the heating process, and hot air is blown indoors.
In step S62, the actual difference in the inlet and outlet enthalpy of the air conditioner is determined based on the operation mode.
In the embodiment of the disclosure, the actual air inlet and outlet enthalpy difference of the air conditioner is determined according to different working modes of the air conditioner.
The method for calculating the actual air inlet and outlet enthalpy difference of the air conditioner is different in calculation mode of the actual air inlet and outlet enthalpy difference of different working modes of the air conditioner.
The following embodiments of the present disclosure further explain and explain a method for determining an actual air inlet/outlet enthalpy difference of an air conditioner based on an operation mode in the above embodiments of the present disclosure.
Fig. 7 is a flowchart illustrating a method for determining an actual air inlet and outlet enthalpy difference of an air conditioner based on an operation mode according to an exemplary embodiment, wherein the method for determining the actual air inlet and outlet enthalpy difference of the air conditioner based on the operation mode, as shown in fig. 7, includes the following steps.
In step S71, the operation mode of the air conditioner is determined.
In the disclosed embodiment, the air conditioner is in a cooling mode. Because the air conditioner also has a dehumidification function in the refrigeration mode, the humidity in the air has certain influence on the actual inlet and outlet enthalpy values. In this case, the air contains a certain humidity, and a humidity sensor needs to be added to the air conditioner in addition to the original temperature sensor.
In step S72, if the operation mode of the air conditioner is the cooling mode, the actual inlet/outlet enthalpy difference of the air conditioner is determined according to the difference between the outlet enthalpy value of the indoor unit of the air conditioner and the inlet enthalpy value of the indoor unit of the air conditioner.
In the embodiment of the disclosure, the air conditioner is judged to be in the refrigeration mode, and because the air is influenced by the humidity factor, the actual inlet and outlet air enthalpy value in the refrigeration mode of the air conditioner is equal to the difference value between the outlet air enthalpy value of the indoor unit of the air conditioner and the inlet air enthalpy value of the indoor unit of the air conditioner.
The following embodiments of the present disclosure further explain and explain a method for determining an actual air inlet/outlet enthalpy difference of an air conditioner based on an operation mode in the above embodiments of the present disclosure.
Fig. 8 is a flowchart illustrating a method of determining an actual air inlet and outlet enthalpy difference of an air conditioner based on an operation mode according to an exemplary embodiment, and as shown in fig. 8, the method of determining the actual air inlet and outlet enthalpy difference of the air conditioner based on the operation mode includes the following steps.
In step S81, the operation mode of the air conditioner is determined.
In the embodiment of the disclosure, the air conditioner is in a heating mode in response. The air passing through the air conditioner can be approximately regarded as dry air, and when the actual inlet and outlet air enthalpy difference is calculated, the temperature sensor is used for measuring the temperature, so that the actual inlet and outlet air enthalpy difference can be obtained.
In step S82, if the operating mode of the air conditioner is the heating mode, the actual air inlet/outlet enthalpy difference of the air conditioner is determined according to the difference between the air outlet enthalpy value of the air conditioner indoor unit and the air inlet enthalpy value of the air conditioner indoor unit, or the actual air inlet/outlet enthalpy difference of the air conditioner is determined according to the temperature of the air outlet of the air conditioner and the indoor environment temperature.
In the embodiment of the disclosure, it is determined that the air conditioner is in the heating mode, and the actual enthalpy difference of the inlet air and the outlet air of the air conditioner can be determined by the difference between the outlet enthalpy value of the indoor unit of the air conditioner and the inlet enthalpy value of the indoor unit of the air conditioner, and can also be determined by the temperature of the outlet of the air conditioner and the temperature of the indoor environment. For example, the determination of the actual air inlet and outlet enthalpy difference of the air conditioner according to the air conditioner outlet temperature and the indoor environment temperature can be expressed as: the air conditioner actual inlet and outlet enthalpy difference =1.01 (air conditioner outlet temperature-indoor ambient temperature). Wherein 1.01 may be the average constant pressure specific heat of the dry air.
The following description of the embodiments of the present disclosure will be made by taking an operation mode of an air conditioner as a heating mode, and exemplifying the method for detecting the state of the air conditioner refrigerant according to the above embodiments of the present disclosure.
In the embodiments of the present disclosure, when the air conditioner is slightly deficient in refrigerant, the cooling effect or the heating effect of the air conditioner has been greatly affected. The embodiment of the disclosure adds a temperature sensor and a humidity sensor at the air outlet of the air conditioner for detecting the air outlet temperature and the air outlet humidity of the air conditioner.
In the embodiment of the disclosure, in response to the operation stability of the air conditioning system, for example, after the air conditioning system is operated for a period of time, the time may be set to 15 minutes. And determining the expected heat exchange capacity value of the air conditioner. The expected heat exchange capacity value can be determined according to the running frequency of the air conditioner compressor, the heat exchange capacity coefficient of the air conditioner and the wind gear correction coefficient. The heat exchange capacity coefficient of the air conditioner can be obtained by testing the air conditioner in a standard environment, and can be 42 watts per hertz, for example.
In the embodiment of the present disclosure, constant parameters in the following embodiments are obtained by testing the air conditioner in a standard environment, that is, an outdoor environment is between-5 ℃ and 35 ℃. The constant parameters are not limited, and the following constant parameters are used as examples.
In the embodiment of the present disclosure, the gear correction coefficients may include a first gear correction coefficient a1, a second gear correction coefficient a2, and a third gear correction coefficient a3. Wherein the first gear correction coefficient is related to the gear, the first gear correction coefficient may be calculated by a1= (13 + wl)/20. Wherein wl is the wind gear, and the value of the wind gear can be 1 to 7.
In the embodiment of the present disclosure, the second damper correction coefficient is related to the outdoor ambient temperature, and the calculation method of the second damper correction coefficient may be a2= (T-out + 33)/40. Wherein T-out is the outdoor ambient temperature.
In the embodiment of the present disclosure, the third gear correction coefficient is related to the indoor ambient temperature, and the calculation method of the third gear correction coefficient may be a3= (100-T-in)/80. Wherein T-in is the indoor environment temperature.
In the disclosed embodiment, the calculated air conditioner expected heat exchange capacity value may be represented as q = F θ a1 a 2a 3. Wherein q represents an expected heat exchange capacity value of the air conditioner, F represents an operation frequency, theta represents a heat exchange capacity value coefficient, a1 represents a first gear correction coefficient, a2 represents a second gear correction coefficient, and a3 represents a third gear correction coefficient.
In the embodiment of the disclosure, the expected air inlet and outlet enthalpy difference of the air conditioner is calculated. The air conditioner expected inlet and outlet enthalpy difference can be expressed as h-cal = q/Qm, wherein h-cal represents the air conditioner expected inlet and outlet enthalpy difference, q represents the expected heat exchange capacity value of the air conditioner, and Qm represents the air mass flow rate, namely the air mass flowing through the air conditioner.
In embodiments of the present disclosure, the air mass flow may be expressed as Qm = a × b × ρ. Wherein a represents the air conditioner air quantity characteristic parameter, b represents the actual rotating speed correction coefficient of the internal circulation fan, and rho represents the air density. The characteristic parameters of the air volume of the air conditioner are related to the structure of the air conditioner, such as the air duct of an indoor unit of the air conditioner, the size of an internal circulation fan of the air conditioner and the specification of an internal circulation motor of the air conditioner. The air-conditioning air quantity characteristic parameters can be obtained in a value range of 500 cubic meters per hour to 1300 cubic meters per hour according to a pre-test. And the actual rotating speed correction coefficient of the internal circulation fan is related to the actual operating rotating speed of the air conditioner. For example, the actual speed correction coefficient of the internal circulation fan may be represented as b = r/1430, where b represents the actual speed correction coefficient of the internal circulation fan and r represents the actual operating speed of the air conditioner. 1430 are parameters obtained from previous experiments. The air density ρ may be 1.29 kilograms per cubic meter.
In the embodiment of the disclosure, the actual enthalpy difference h-real of the air conditioner can be expressed as h-real = h-1-h-2. Wherein, h-1 represents the air outlet enthalpy value of the indoor unit of the air conditioner, and h-2 represents the air inlet enthalpy value of the indoor unit of the air conditioner. The difference between the air outlet enthalpy value of the indoor unit of the air conditioner and the air inlet enthalpy value of the indoor unit of the air conditioner is the actual inlet and outlet air enthalpy difference of the air conditioner. The method for calculating the actual air inlet and outlet enthalpy difference of the air conditioner is not only suitable for the air conditioner in a refrigeration mode, but also suitable for the air conditioner in a heating mode.
In the embodiment of the disclosure, the actual air inlet and outlet enthalpy difference h-real of the air conditioner can be further expressed as h-real =1.01 (T-inlet air-T-in). Wherein, T-air outlet represents the temperature of the air outlet of the air conditioner, and the unit is centigrade. T-in represents the indoor ambient temperature in degrees Celsius. 1.01 is the average constant pressure specific heat of dry air. The method for calculating the actual air inlet and outlet enthalpy difference of the air conditioner is suitable for the air conditioner in a heating mode. When the air conditioner is in a heating mode, the judgment of air humidity is not needed, so that the difference value of the inlet and outlet enthalpy values of dry air can be adopted for calculation. When the air conditioner is in a cooling mode, the air contains water vapor, and the humidity of the air needs to be judged, so that the judgment cannot be carried out by adopting the formula of h-real =1.01 (T-inlet-T-in).
In the embodiment of the present disclosure, in response to the air conditioner being stably operated, for example, the operation may be performed for 10 to 20 minutes. The air conditioner compressor frequency is greater than a frequency threshold, such as greater than 30 hertz. And comparing the difference between the expected air inlet and outlet enthalpy difference and the actual air inlet and outlet enthalpy difference with the preset threshold value. If the difference is greater than or equal to the preset threshold, the state of the refrigerant of the air conditioner is judged to be in an abnormal state at present, for example, the refrigerant is lacked. And if the difference value is smaller than the preset threshold value, judging that the refrigerant state of the air conditioner is in a normal state at present and no refrigerant is lacked.
It should be noted that, as can be understood by those skilled in the art, the various embodiments/examples related to the embodiments of the present disclosure may be used in combination with the foregoing embodiments, or may be used independently. Whether used alone or in conjunction with the foregoing embodiments, implement principles similar thereto. In the practice of the present disclosure, some examples are described in terms of embodiments used together. Of course, those skilled in the art will appreciate that such illustration is not a limitation of the disclosed embodiments.
Based on the same conception, the embodiment of the disclosure also provides a device for detecting the state of the air conditioner refrigerant.
It is understood that, in order to implement the above functions, the apparatus for detecting the state of the refrigerant of the air conditioner provided by the embodiments of the present disclosure includes a hardware structure and/or a software module corresponding to each function. The disclosed embodiments can be implemented in hardware or a combination of hardware and computer software, in combination with the exemplary elements and algorithm steps disclosed in the disclosed embodiments. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
Fig. 9 is a block diagram illustrating an apparatus for detecting a state of refrigerant of an air conditioner according to an exemplary embodiment. Referring to fig. 9, the apparatus includes an acquisition unit 101 and a processing unit 102.
The obtaining unit 101 is configured to obtain an operating parameter of the air conditioner.
The processing unit 102 is configured to determine an expected heat exchange capacity value of the air conditioner according to the operating parameter, determine an actual air inlet/outlet enthalpy difference of the air conditioner, determine an expected air inlet/outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value, and determine a refrigerant state of the air conditioner according to the actual air inlet/outlet enthalpy difference and the expected air inlet/outlet enthalpy difference.
In one embodiment, the processing unit 102 determines the refrigerant state of the air conditioner according to the actual air inlet/outlet enthalpy difference and the expected air inlet/outlet enthalpy difference by: determining a difference between the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference; if the difference value is larger than or equal to a preset threshold value, determining that the state of the refrigerant of the air conditioner is an abnormal state; and if the difference is smaller than the preset threshold value, determining that the state of the refrigerant of the air conditioner is a normal state.
In another embodiment, the processing unit 102 determines the expected difference in enthalpy of air inlet and outlet air of the air conditioner according to the expected heat exchange capacity value by the following method: determining air mass flow passing through the air conditioner, wherein the air mass flow is determined based on attribute information of a circulating fan in the air conditioner; and determining the ratio of the expected heat exchange capacity value to the air mass flow as the expected air inlet and outlet enthalpy difference of the air conditioner.
In another embodiment, the processing unit 102 determines the mass air flow through the air conditioner as follows: determining an air quantity characteristic parameter of the internal circulation fan based on the structural attribute of the internal circulation fan; determining an actual rotating speed correction parameter of the internal circulation fan of the air conditioner based on the actual rotating speed of the internal circulation fan of the air conditioner; and taking the product of the actual rotating speed correction parameter of the internal circulation fan, the air quantity characteristic parameter and the air density as the mass flow of the air flowing through the air conditioner.
In another embodiment, the obtaining unit 101 obtains the operating parameters of the air conditioner as follows: acquiring the operating frequency, the wind level, the outdoor environment temperature, the indoor environment temperature and the heat exchange capacity value coefficient of the air conditioner; the processing unit 102 determines the expected heat exchange capacity value of the air conditioner according to the working parameters in the following manner: determining a first air gear correction coefficient according to the air gear, determining a second air gear correction coefficient according to the outdoor environment temperature, and determining a third air gear correction coefficient according to the indoor environment temperature; and fitting the operating frequency, the first gear correction coefficient, the second gear correction coefficient, the third gear correction coefficient and the heat exchange capacity value coefficient to obtain an expected heat exchange capacity value of the air conditioner.
In another embodiment, the processing unit 102 determines the actual air inlet/outlet enthalpy difference of the air conditioner by: determining an operating mode of the air conditioner, wherein the operating mode comprises a cooling mode or a heating mode; and determining the actual air inlet and outlet enthalpy difference of the air conditioner based on the working mode.
In another embodiment, the processing unit 102 determines the actual difference in air inlet/outlet enthalpy of the air conditioner based on the operation mode as follows: and if the working mode of the air conditioner is a refrigeration mode, determining the actual air inlet and outlet enthalpy difference of the air conditioner according to the difference value of the air outlet enthalpy value of the indoor unit of the air conditioner and the air inlet enthalpy value of the indoor unit of the air conditioner.
In another embodiment, the processing unit 102 determines the actual difference in enthalpy of air inlet and outlet of the air conditioner based on the operation mode as follows: and if the working mode of the air conditioner is a heating mode, determining the actual inlet and outlet air enthalpy difference of the air conditioner according to the difference value between the outlet air enthalpy value of the indoor unit of the air conditioner and the inlet air enthalpy value of the indoor unit of the air conditioner, or determining the actual inlet and outlet air enthalpy difference of the air conditioner according to the temperature of an air outlet of the air conditioner and the temperature of the indoor environment.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 10 is a block diagram illustrating an apparatus for detecting a state of refrigerant of an air conditioner according to an exemplary embodiment. For example, the apparatus 200 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 10, the apparatus 200 may include one or more of the following components: a processing component 202, a memory 204, a power component 206, a multimedia component 208, an audio component 210, an input/output (I/O) interface 212, a sensor component 214, and a communication component 216.
The processing component 202 generally controls overall operation of the device 200, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 202 may include one or more processors 220 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 202 can include one or more modules that facilitate interaction between the processing component 202 and other components. For example, the processing component 202 may include a multimedia module to facilitate interaction between the multimedia component 208 and the processing component 202.
The memory 204 is configured to store various types of data to support operations at the apparatus 200. Examples of such data include instructions for any application or method operating on device 200, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 204 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
Power components 206 provide power to the various components of device 200. The power components 206 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the apparatus 200.
The multimedia component 208 includes a screen that provides an output interface between the device 200 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 208 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 200 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 210 is configured to output and/or input audio signals. For example, audio component 210 includes a Microphone (MIC) configured to receive external audio signals when apparatus 200 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 204 or transmitted via the communication component 216. In some embodiments, audio component 210 also includes a speaker for outputting audio signals.
The I/O interface 212 provides an interface between the processing component 202 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 214 includes one or more sensors for providing various aspects of status assessment for the device 200. For example, the sensor assembly 214 may detect an open/closed state of the device 200, the relative positioning of components, such as a display and keypad of the device 200, the sensor assembly 214 may also detect a change in the position of the device 200 or a component of the device 200, the presence or absence of user contact with the device 200, the orientation or acceleration/deceleration of the device 200, and a change in the temperature of the device 200. The sensor assembly 214 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 214 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 214 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 216 is configured to facilitate wired or wireless communication between the apparatus 200 and other devices. The device 200 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 216 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 216 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 200 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as memory 204, comprising instructions executable by processor 220 of device 200 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms "first," "second," and the like, are used to describe various information and should not be limited by these terms. These terms are only used to distinguish one type of information from another, and do not indicate a particular order or degree of importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.
It is further understood that, unless otherwise specified, "connected" includes direct connections between the two without other elements and indirect connections between the two with other elements.
It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the scope of the appended claims.

Claims (11)

1. A method for detecting a state of a refrigerant of an air conditioner, comprising:
obtaining working parameters of the air conditioner, and determining an expected heat exchange capacity value of the air conditioner according to the working parameters;
determining the actual air inlet and outlet enthalpy difference of the air conditioner, and determining the expected air inlet and outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value;
and determining the state of the refrigerant of the air conditioner according to the actual air inlet-outlet enthalpy difference and the expected air inlet-outlet enthalpy difference.
2. The method of claim 1, wherein said determining a refrigerant condition of said air conditioner based on said actual air inlet and outlet enthalpy difference and said expected air inlet and outlet enthalpy difference comprises:
determining a difference between the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference;
if the difference value is larger than or equal to a preset threshold value, determining that the state of the refrigerant of the air conditioner is an abnormal state;
and if the difference is smaller than the preset threshold value, determining that the state of the refrigerant of the air conditioner is a normal state.
3. The method of claim 1 or 2, wherein said determining an expected air inlet and outlet enthalpy difference of the air conditioner based on the expected heat exchange capacity value comprises:
determining the air mass flow passing through the air conditioner, wherein the air mass flow is determined based on the attribute information of the circulating fan in the air conditioner;
and determining the ratio of the expected heat exchange capacity value to the air mass flow as the expected air inlet and outlet enthalpy difference of the air conditioner.
4. The method of claim 3, wherein the determining a mass air flow through the air conditioner comprises:
determining an air quantity characteristic parameter of the internal circulation fan based on the structural attribute of the internal circulation fan;
determining an actual rotating speed correction parameter of the internal circulating fan based on the actual rotating speed of the internal circulating fan of the air conditioner;
and taking the product of the actual rotating speed correction parameter of the internal circulation fan, the air quantity characteristic parameter and the air density as the mass flow of the air flowing through the air conditioner.
5. The method of claim 1, wherein obtaining operating parameters of the air conditioner and determining an expected heat transfer capacity value of the air conditioner based on the operating parameters comprises:
acquiring the operating frequency, the wind level, the outdoor environment temperature, the indoor environment temperature and the heat exchange capacity value coefficient of the air conditioner;
determining a first air gear correction coefficient according to the air gear, determining a second air gear correction coefficient according to the outdoor environment temperature, and determining a third air gear correction coefficient according to the indoor environment temperature;
and fitting the operating frequency, the first gear correction coefficient, the second gear correction coefficient, the third gear correction coefficient and the heat exchange capacity value coefficient to obtain an expected heat exchange capacity value of the air conditioner.
6. The method of claim 1, wherein the determining an actual air inlet and outlet enthalpy difference of the air conditioner comprises:
determining an operating mode of the air conditioner, wherein the operating mode comprises a cooling mode or a heating mode;
and determining the actual air inlet and outlet enthalpy difference of the air conditioner based on the working mode.
7. The method of claim 6, wherein determining an actual air inlet and outlet enthalpy difference of the air conditioner based on the operating mode comprises:
and if the working mode of the air conditioner is a refrigeration mode, determining the actual inlet and outlet air enthalpy difference of the air conditioner according to the difference value of the outlet air enthalpy value of the indoor unit of the air conditioner and the inlet air enthalpy value of the indoor unit of the air conditioner.
8. The method of claim 6, wherein said determining an actual air inlet and outlet enthalpy difference of the air conditioner based on the operating mode comprises:
and if the working mode of the air conditioner is a heating mode, determining the actual air inlet and outlet enthalpy difference of the air conditioner according to the difference between the air outlet enthalpy value of the indoor unit of the air conditioner and the air inlet enthalpy value of the indoor unit of the air conditioner, or determining the actual air inlet and outlet enthalpy difference of the air conditioner according to the temperature of an air outlet of the air conditioner and the temperature of the indoor environment.
9. An apparatus for detecting the state of air-conditioning refrigerant, which is characterized in that the method for detecting the state of air-conditioning refrigerant according to any one of claims 1 to 8 is carried out, and comprises the following steps:
the acquisition unit is used for acquiring working parameters of the air conditioner;
and the processing unit is used for determining an expected heat exchange capacity value of the air conditioner according to the working parameters, determining an actual air inlet and outlet enthalpy difference of the air conditioner, determining an expected air inlet and outlet enthalpy difference of the air conditioner according to the expected heat exchange capacity value, and determining a refrigerant state of the air conditioner according to the actual air inlet and outlet enthalpy difference and the expected air inlet and outlet enthalpy difference.
10. An apparatus for detecting a state of a refrigerant of an air conditioner, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to: the method for detecting the state of the air conditioner refrigerant according to any one of claims 1 to 8.
11. A storage medium, characterized in that the storage medium has stored therein instructions, which when executed by a processor of a terminal, enable the terminal including the processor to execute the method of detecting a state of an air conditioner refrigerant according to any one of claims 1 to 8.
CN202210749894.9A 2022-06-29 2022-06-29 Method and device for detecting state of air conditioner refrigerant and storage medium Pending CN115218341A (en)

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Citations (6)

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CN111306718A (en) * 2020-02-19 2020-06-19 珠海格力电器股份有限公司 Air conditioner operation control method and device, readable storage medium and air conditioner
CN112944618A (en) * 2021-02-05 2021-06-11 青岛海信日立空调系统有限公司 Air conditioner capacity estimation method and air conditioner

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* Cited by examiner, † Cited by third party
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KR20150128135A (en) * 2014-05-08 2015-11-18 엘지전자 주식회사 Air-conditioner system and method
US20180283752A1 (en) * 2017-04-04 2018-10-04 Samsung Electronics Co., Ltd. Air conditioner and method for controlling the same
CN107215174A (en) * 2017-06-27 2017-09-29 安徽江淮汽车集团股份有限公司 Detection method for detecting air-conditioning thermic load and refrigerant flow
CN107747789A (en) * 2017-08-30 2018-03-02 青岛海尔空调器有限总公司 The fault detect of air-conditioning and its supercooling tube group and processing method
CN111306718A (en) * 2020-02-19 2020-06-19 珠海格力电器股份有限公司 Air conditioner operation control method and device, readable storage medium and air conditioner
CN112944618A (en) * 2021-02-05 2021-06-11 青岛海信日立空调系统有限公司 Air conditioner capacity estimation method and air conditioner

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