CN112443932A - Refrigeration capacity determining method, refrigeration energy efficiency ratio determining method and fault reminding method - Google Patents
Refrigeration capacity determining method, refrigeration energy efficiency ratio determining method and fault reminding method Download PDFInfo
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- CN112443932A CN112443932A CN201910833040.7A CN201910833040A CN112443932A CN 112443932 A CN112443932 A CN 112443932A CN 201910833040 A CN201910833040 A CN 201910833040A CN 112443932 A CN112443932 A CN 112443932A
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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
- F24F11/38—Failure diagnosis
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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
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/60—Energy consumption
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a method for determining refrigerating capacity, a method for determining refrigerating energy efficiency ratio and a fault reminding method for an air conditioner. The invention aims to solve the problem that the existing method for determining the refrigerating capacity of the air-cooled air conditioner cannot accurately calculate the refrigerating capacity of the air-cooled air conditioner. To this end, the cooling capacity determination method of the present invention includes: obtaining the indoor air density; acquiring the air supply quantity of an indoor unit; acquiring an air inlet enthalpy value of the indoor unit; acquiring an air outlet enthalpy value of the indoor unit; and determining the refrigerating capacity of the air conditioner according to the indoor air density, the air supply quantity of the indoor unit, the air inlet enthalpy value and the air outlet enthalpy value. According to the indoor air refrigerating system, the air quality of the indoor unit capable of refrigerating per second is estimated through the indoor air density and the air supply quantity, and the air inlet enthalpy value and the air outlet enthalpy value can reflect the energy contained in the air, so that the indoor air refrigerating system can be combined with the indoor air density, the air supply quantity, the air inlet enthalpy value and the air outlet enthalpy value to realize accurate calculation of the refrigerating quantity.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a method for determining refrigerating capacity, a method for determining refrigerating energy efficiency ratio and a fault reminding method for an air conditioner.
Background
Along with the continuous improvement of living standard of people, people also put forward higher and higher requirements on living environment. In order to maintain a comfortable ambient temperature, an air conditioner has become an indispensable equipment in human life. In recent years, in order to control the operation of the air conditioner more accurately, the controller of the air conditioner often needs to monitor various operation parameters of the air conditioner in real time, the operation parameters which can be directly measured through a sensor are easy to collect, and the parameters which cannot be directly measured through the sensor, such as the refrigerating capacity and the refrigerating energy efficiency ratio, are difficult to collect. In particular, for a multi-split air conditioner composed of an outdoor unit and a plurality of indoor units, in order to facilitate a user to manage the operation conditions of the plurality of indoor units, the multi-split air conditioner often needs to monitor the cooling capacity of each indoor unit. Although a small amount of methods for calculating the refrigerating capacity exist in the prior art, the calculation methods usually need to rely on measuring the temperature change of heat exchange water to realize the calculation of the refrigerating capacity, namely the calculation methods are only suitable for the water-cooled multi-split air conditioner and cannot well calculate the refrigerating capacity of each indoor unit in the air-cooled multi-split air conditioner.
Accordingly, there is a need in the art for a new cooling capacity determination method, cooling energy efficiency ratio determination method, and malfunction alerting method for an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the existing method for determining the cooling capacity of an air-cooled air conditioner cannot simply and accurately calculate the cooling capacity of the air-cooled air conditioner, the present invention provides a method for determining the cooling capacity of an air conditioner, wherein the air conditioner comprises an indoor unit, and the method for determining the cooling capacity comprises the following steps: obtaining the indoor air density; acquiring the air supply quantity of the indoor unit; acquiring an air inlet enthalpy value of the indoor unit; acquiring an air outlet enthalpy value of the indoor unit; and determining the refrigerating capacity of the air conditioner according to the indoor air density, the air supply quantity, the air inlet enthalpy value and the air outlet enthalpy value of the indoor unit.
In an preferable technical scheme of the above method for determining the cooling capacity, "determining the cooling capacity of the air conditioner according to the indoor air density, the air supply capacity, the air intake enthalpy value, and the air outlet enthalpy value of the indoor unit" specifically includes calculating the cooling capacity of the air conditioner by the following equation: q ═ ρ × ν × (H)1-H2) Wherein Q is the refrigerating capacity of the air conditioner, ρ is the indoor air density, v is the air delivery of the indoor unit, H1Is the inlet air enthalpy value of the indoor unit, H2And the air outlet enthalpy value of the indoor unit is obtained.
In the preferable technical scheme of the method for determining the refrigerating capacity, the step of acquiring the indoor air density specifically comprises the following steps: and acquiring the density of the inlet air of the indoor unit.
In a preferred technical scheme of the cooling capacity determining method, the step of obtaining the air output of the indoor unit specifically includes: and determining the air supply quantity of the indoor unit according to the model and the number of the air conditioners.
In the preferable technical scheme of the cooling capacity determination method, the step of obtaining the air inlet enthalpy value of the indoor unit specifically comprises the following steps: acquiring the inlet air temperature and inlet air humidity of the indoor unit; and determining the inlet air enthalpy value of the indoor unit according to the inlet air temperature and the inlet air humidity of the indoor unit.
In a preferred technical scheme of the method for determining the refrigerating capacity, the step of obtaining the air outlet enthalpy value of the indoor unit specifically comprises the following steps: acquiring the air outlet temperature and the air outlet humidity of the indoor unit; and determining the air outlet enthalpy value of the indoor unit according to the air outlet temperature and the air outlet humidity of the indoor unit.
The invention also provides a refrigeration energy efficiency ratio determining method for the air conditioner, which comprises the following steps: acquiring the refrigerating capacity of the air conditioner; acquiring the power of the air conditioner; calculating the ratio of the refrigerating capacity of the air conditioner to the power of the air conditioner, and recording as the refrigerating energy efficiency ratio; the refrigerating capacity of the air conditioner is determined by the refrigerating capacity determination method in any one of the preferable technical schemes.
In a preferred technical solution of the above method for determining a refrigeration energy efficiency ratio, the step of "obtaining the power of the air conditioner" includes: acquiring a power supply current of the air conditioner; acquiring a power supply voltage of the air conditioner; and calculating the product of the power supply current of the air conditioner and the power supply voltage of the air conditioner, and recording as the power of the air conditioner.
The invention also provides a fault reminding method for the air conditioner, which comprises the following steps: acquiring the refrigerating capacity of the air conditioner; comparing the acquired refrigerating capacity of the air conditioner with a preset refrigerating capacity; if the difference value between the preset refrigerating capacity and the obtained refrigerating capacity of the air conditioner is larger than a preset difference value, controlling the air conditioner to send out a fault prompt; the refrigerating capacity of the air conditioner is determined by the refrigerating capacity determination method in any one of the preferable technical schemes.
The invention also provides a fault reminding method for the air conditioner, which comprises the following steps: acquiring the refrigeration energy efficiency ratio of the air conditioner; comparing the obtained refrigeration energy efficiency ratio of the air conditioner with a preset energy efficiency ratio; if the obtained refrigeration energy efficiency ratio of the air conditioner is smaller than the preset energy efficiency ratio, controlling the air conditioner to send out a fault prompt; the refrigeration energy efficiency ratio of the air conditioner is determined by the refrigeration energy efficiency ratio determination method in any one of the above preferred technical solutions.
As can be understood by those skilled in the art, in the technical solution of the present invention, the air conditioner of the present invention includes an indoor unit, and the method for determining cooling capacity of the present invention includes: obtaining the indoor air density; acquiring the air supply quantity of the indoor unit; acquiring an air inlet enthalpy value of the indoor unit; acquiring an air outlet enthalpy value of the indoor unit; and determining the refrigerating capacity of the air conditioner according to the indoor air density, the air supply quantity, the air inlet enthalpy value and the air outlet enthalpy value of the indoor unit. The determination method estimates the air quality of the indoor unit capable of refrigerating per second through the indoor air density and the air supply quantity of the indoor unit, and the air inlet enthalpy value and the air outlet enthalpy value can reflect the energy contained in the air, so that the method realizes accurate calculation of the refrigerating capacity by combining the indoor air density, the air supply quantity of the indoor unit, the air inlet enthalpy value and the air outlet enthalpy value, the determination method has few related basic parameters and simple acquisition mode, and the calculation process is very simple; in addition, the calculation mode not only can be suitable for the air-cooled air conditioner, but also can be used for respectively calculating the refrigerating capacity of each indoor unit in the air-cooled multi-split air conditioner, so that the controller of the air conditioner can accurately and effectively manage each indoor unit based on the refrigerating capacity of each indoor unit, and the air conditioner can always keep high-efficiency operation efficiency.
Further, in a preferred embodiment of the present invention, the present invention calculates the cooling capacity of the air conditioner by the following equation: q ═ ρ × v × (H)1-H2) Q is the refrigerating capacity of the air conditioner, rho is the density of indoor air, nu is the air output of the indoor unit, and H1Being said indoor unitEnthalpy of intake air, H2And the air outlet enthalpy value of the indoor unit is obtained. The invention estimates the air quality of the indoor unit which can be refrigerated per second by calculating the product of the indoor air density and the air supply quantity of the indoor unit, estimates the energy change quantity of the air after the air is refrigerated by the indoor unit by the enthalpy difference between the air inlet enthalpy value and the air outlet enthalpy value, and estimates the refrigerating capacity of the air conditioner by the product of the two values; it should be noted that, in the existing refrigeration capacity determining methods, only the temperature change amount is used to estimate the heat change amount of the air in the calculation process, but the relationship between the refrigeration capacity and the change amount of the air humidity is completely ignored.
Further, in a preferred technical scheme of the present invention, when the air conditioner operates in a cooling condition, the fault reminding method of the present invention can determine whether the air conditioner itself has an abnormal condition according to the cooling capacity of the air conditioner; it can be understood that the refrigerating capacity represents the refrigerating capacity of the air conditioner, so that whether the refrigerating capacity of the air conditioner is abnormal or not is judged according to the refrigerating capacity, and a fault prompt is timely sent out when the refrigerating capacity of the air conditioner is abnormal, so that a user can timely and accurately master the abnormal condition of the air conditioner, and the air conditioner is effectively protected.
Further, in a preferred technical scheme of the present invention, when the air conditioner operates in a refrigeration working condition, the fault notification method of the present invention can determine whether the air conditioner itself is in an abnormal condition according to a refrigeration energy efficiency ratio of the air conditioner; it can be understood that the refrigeration energy efficiency ratio represents the refrigeration efficiency of the air conditioner, so as to judge whether the refrigeration efficiency of the air conditioner is abnormal or not through the refrigeration energy efficiency ratio, and timely send out a fault prompt when the refrigeration efficiency of the air conditioner is abnormal, so that a user can timely and accurately master the abnormal condition of the air conditioner, and further effectively protect the air conditioner.
Drawings
Fig. 1 is a flow chart of the main steps of the cooling capacity determination method of the present invention;
FIG. 2 is a flow chart of the steps of the fault alert method of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the steps of the method of the present invention are described herein in a particular order, these orders are not limiting, and one skilled in the art may perform the steps in a different order without departing from the underlying principles of the invention.
Based on the problem that the existing method for determining the refrigerating capacity of the air conditioner cannot simply and accurately calculate the refrigerating capacity of the air-cooled air conditioner, the invention provides a method for determining the refrigerating energy efficiency ratio of the air conditioner, which comprises the following steps: obtaining the indoor air density; acquiring the air supply quantity of the indoor unit; acquiring an air inlet enthalpy value of the indoor unit; acquiring an air outlet enthalpy value of the indoor unit; and calculating the refrigerating capacity of the air conditioner according to the indoor air density, the air supply quantity, the air inlet enthalpy value and the air outlet enthalpy value of the indoor unit so as to quickly and accurately calculate the refrigerating capacity of the air conditioner.
Specifically, the air conditioner comprises an indoor unit, wherein an air inlet and an air outlet are formed in the indoor unit, air flows into the indoor unit through the air inlet to exchange heat, and then flows out through the air outlet. It should be noted that the present invention does not limit the specific structure of the air conditioner, and a skilled person may apply the determination method of the present invention to various types of air conditioners. The air conditioner further comprises an air inlet temperature sensor, an air outlet temperature sensor, an air inlet humidity sensor and an air outlet humidity sensor, wherein the air inlet temperature sensor can detect the air inlet temperature of the indoor unit, the air outlet temperature sensor can detect the air outlet temperature of the indoor unit, the air inlet humidity sensor can detect the air inlet humidity of the indoor unit, and the air outlet humidity sensor can detect the air outlet humidity of the indoor unit. The air conditioner further comprises a controller, wherein the controller can acquire the air inlet temperature of the indoor unit through the air inlet temperature sensor, acquire the air outlet temperature of the indoor unit through the air outlet temperature sensor, acquire the air inlet humidity of the indoor unit through the air inlet humidity sensor, and acquire the air outlet humidity of the indoor unit through the air outlet humidity sensor. In addition, it can be understood by those skilled in the art that the present invention does not limit the specific structure and model of the controller, and the controller may be an original controller of the air conditioner, or a controller separately configured to perform the determining method and the fault reminding method of the present invention, and a technician may set the structure and model of the controller according to actual use requirements.
Referring first to fig. 1, a flow chart of the main steps of the cooling capacity determination method of the present invention is shown. As shown in fig. 1, based on the air conditioner described in the above embodiment, the method for determining cooling capacity of the present invention mainly includes the following steps:
s1: obtaining the indoor air density;
s2: acquiring the air supply quantity of an indoor unit;
s3: acquiring an air inlet enthalpy value of the indoor unit;
s4: acquiring an air outlet enthalpy value of the indoor unit;
s5: and calculating the refrigerating capacity of the air conditioner according to the indoor air density, the air supply quantity, the air inlet enthalpy value and the air outlet enthalpy value.
Further, in step S1, the controller may obtain an indoor air density at which the indoor unit is located; it should be noted that, the present invention does not limit the method for acquiring the indoor air density by the controller, and a technician may directly transmit the measurement data to the controller after performing measurement by a special measurement instrument, or may calculate the indoor air density by itself by measuring the indoor temperature and the indoor pressure, as long as the controller can acquire the indoor air density. In addition, it should be noted that, because there may be slight differences in the air density at various indoor locations, in order to better ensure the accuracy of the calculation result, the present invention preferably uses the intake air density of the indoor unit as a basic parameter, that is, the density of the air near the air inlet; of course, this is not restrictive, and the technician may set the setting according to actual requirements.
Further, in step S2, the controller may acquire an air volume of the indoor unit; it should be noted that, the present invention does not limit the manner in which the controller obtains the air output, and the controller may directly determine the air output of the indoor unit according to the model and the number of the air conditioners, that is, according to the original data of manufacturers, or may calculate the air output of the indoor unit by measuring the area of the air outlet and the air supply speed, that is, a technician may set the obtaining manner according to the actual use requirement.
Further, in step S3, the controller may obtain an intake enthalpy value of the indoor unit; as a preferred embodiment, the controller obtains the intake air temperature of the indoor unit through the intake air temperature sensor, obtains the intake air humidity of the indoor unit through the intake air humidity sensor, and after the controller obtains the intake air temperature and the intake air humidity of the indoor unit, the controller can determine the intake air enthalpy value of the indoor unit according to an internally stored psychrometric chart. Of course, it can be understood by those skilled in the art that the present invention does not limit the manner in which the controller obtains the enthalpy of the intake air, and those skilled in the art can set the method according to the actual use requirement, and the change of the specific obtaining manner does not depart from the basic principle of the present invention, and falls into the protection scope of the present invention.
Further, in step S4, the controller may obtain an air outlet enthalpy value of the indoor unit; as a preferred embodiment, the controller obtains the outlet air temperature of the indoor unit through the outlet air temperature sensor, obtains the outlet air humidity of the indoor unit through the outlet air humidity sensor, and after the controller obtains the outlet air temperature and the outlet air humidity of the indoor unit, the controller can determine the outlet air enthalpy value of the indoor unit according to an internally stored psychrometric chart. Of course, it can be understood by those skilled in the art that the present invention does not limit the manner of acquiring the air outlet enthalpy value by the controller, and those skilled in the art can set the manner according to the actual use requirement, and the change of the specific acquiring manner does not depart from the basic principle of the present invention, and falls into the protection scope of the present invention.
It should be noted that the present invention does not limit the acquiring sequence of the four basic parameters, that is, the controller may acquire the four parameters according to a specific acquiring sequence or simultaneously acquire the four parameters, and the specific acquiring sequence is not changed from the basic principle of the present invention. Meanwhile, as can be understood by those skilled in the art, for an air conditioner with a plurality of indoor units, the controller only needs to calculate the cooling capacity of each indoor unit through the determination method, and then sum the calculated cooling capacities to obtain the total cooling capacity of the air conditioner.
Further, in step S5, the controller may calculate a cooling capacity of the air conditioner according to the indoor air density, the air supply amount, the intake air enthalpy value, and the outlet air enthalpy value. It should be noted that the present invention does not limit the specific calculation method, and a technician may fit the calculation formula by an experimental method according to the structural characteristics of different air conditioners, and it is within the protection scope of the present invention as long as the refrigeration capacity determination method only uses four measurement values of indoor air density, air supply capacity, air inlet enthalpy and air outlet enthalpy to perform calculation. As a preferred embodiment, the present invention can calculate the cooling capacity Q of the air conditioner by the following equation:
Q＝ρ×ν×(H1-H2)
where ρ is the indoor air density in kg/m3(ii) a v is the air volume of the indoor unit, and the unit m thereof3/s；H1The unit kj/kg of the inlet air enthalpy value of the indoor unit; h2The unit kj/kg is the air outlet enthalpy value of the indoor unit. Of course, the technician can also calculate the requirement according to the actual situationOne or more correction coefficients are added to the above equation to further improve the accuracy of the calculation.
In addition, the invention also provides a refrigeration energy efficiency ratio determining method, after the refrigerating capacity of the air conditioner is calculated by the determining method, the controller can calculate the power of the air conditioner through P ═ UxI; wherein U is the supply voltage of the air conditioner, I is usually 220V, I is the supply current of the air conditioner, and it can be measured by directly arranging a current sensor at the power terminal of the electric control box of the air conditioner. Of course, the manner of calculating the power of the air conditioner is not limited, and the technician can set the power according to the actual use requirement. After the power of the air conditioner is calculated, the controller can obtain the refrigeration energy efficiency ratio of the air conditioner by calculating the ratio of the refrigerating capacity to the power, so that the controller can calculate the refrigeration energy efficiency ratio of the air conditioner in real time.
Referring next to fig. 2, a flowchart of the steps of the fault notification method of the present invention is shown. As shown in fig. 2, based on the air conditioner described in the above embodiment, the fault reminding method of the present invention specifically includes the following steps:
s101: the air conditioner is in a refrigeration working condition;
s102: acquiring the refrigerating capacity of the air conditioner;
s103: judging whether the difference value between the preset refrigerating capacity and the refrigerating capacity is larger than a preset difference value or not; if yes, go to step S106; if not, executing step S102 again;
s104: acquiring the refrigeration energy efficiency ratio of the air conditioner;
s105: judging whether the refrigeration energy efficiency ratio of the air conditioner is smaller than a preset energy efficiency ratio or not; if yes, go to step S106; if not, executing step S104 again;
s106: and controlling the air conditioner to send out a fault prompt.
Further, under the condition that the air conditioner operates in the cooling working condition, in step S102, the controller may obtain a cooling capacity of the air conditioner; the cooling capacity used in this step is the cooling capacity calculated by the above determination method. Next, step S103 is executed, where the controller determines whether a difference between the preset cooling capacity and the obtained cooling capacity is greater than the preset difference, so as to determine whether the cooling capacity of the air conditioner reaches the standard. The technical personnel in the field can understand that the technical personnel can set the specific values of the preset refrigerating capacity and the preset difference value according to the actual use requirement, and the difference value between the preset refrigerating capacity and the refrigerating capacity can represent that the refrigerating capacity of the air conditioner does not reach the standard as long as the difference value is larger than the preset difference value. Based on the judgment result of the step S103, if the difference between the preset refrigeration capacity and the obtained refrigeration capacity is greater than the preset difference, it indicates that the refrigeration capacity of the air conditioner is insufficient, and at this time, step S106 is executed; if the difference value between the preset refrigeration capacity and the obtained refrigeration capacity is smaller than or equal to the preset difference value, the refrigeration capacity of the air conditioner is judged to reach the standard, and at the moment, the step S102 is executed again so as to continue to monitor the refrigeration capacity of the air conditioner.
Further, under the condition that the air conditioner operates in the cooling working condition, in step S104, the controller obtains a cooling energy efficiency ratio of the air conditioner; the refrigeration energy efficiency ratio used in this step is the refrigeration energy efficiency ratio calculated by the above-described determination method. Next, step S105 is executed, and the controller determines whether the acquired refrigeration energy efficiency ratio is smaller than the preset energy efficiency ratio, so as to determine whether the refrigeration efficiency of the air conditioner reaches the standard. As will be understood by those skilled in the art, the specific value of the preset energy efficiency ratio may be set by those skilled in the art according to actual use requirements, as long as the preset energy efficiency ratio can represent the minimum standard of the refrigeration efficiency. Based on the judgment result of the step S105, if the obtained refrigeration energy efficiency ratio is smaller than the preset energy efficiency ratio, it indicates that the refrigeration efficiency of the air conditioner is insufficient, in this case, step S106 is executed; and if the acquired refrigeration energy efficiency ratio is greater than or equal to the preset energy efficiency ratio, the refrigeration efficiency of the air conditioner is judged to reach the standard, and at the moment, the step S104 is executed again so as to continue to monitor the refrigeration efficiency of the air conditioner.
Further, in step S106, under the condition that the cooling capacity of the air conditioner does not reach the standard or the cooling efficiency does not reach the standard, the controller may control the air conditioner to issue a fault notification. It should be noted that the invention does not limit the way of sending the fault reminder to the air conditioner, and the technical staff can set the fault reminder according to the actual use requirement, for example, the air conditioner can send the voice reminder to the user through the voice device, and also can send the text reminder through the control terminal.
Finally, it should be noted that the above examples are all preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. When the present invention is actually used, a part of the steps may be added or deleted as needed or the order between the different steps may be changed by those skilled in the art. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
So far, the preferred embodiments of the present invention have been described in conjunction with the accompanying drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A cooling capacity determination method for an air conditioner, wherein the air conditioner includes an indoor unit, the cooling capacity determination method comprising:
obtaining the indoor air density;
acquiring the air supply quantity of the indoor unit;
acquiring an air inlet enthalpy value of the indoor unit;
acquiring an air outlet enthalpy value of the indoor unit;
and determining the refrigerating capacity of the air conditioner according to the indoor air density, the air supply quantity, the air inlet enthalpy value and the air outlet enthalpy value of the indoor unit.
2. The cooling capacity determination method according to claim 1, wherein the step of determining the cooling capacity of the air conditioner based on the indoor air density, the air supply amount, the intake air enthalpy value, and the outlet air enthalpy value of the indoor unit specifically includes calculating the cooling capacity of the air conditioner by the following equation:
Q＝ρ×ν×(H1-H2)
q is the refrigerating capacity of the air conditioner, rho is the density of indoor air, ν is the air output of the indoor unit, and H1Is the inlet air enthalpy value of the indoor unit, H2And the air outlet enthalpy value of the indoor unit is obtained.
3. The cooling capacity determination method according to claim 2, wherein the step of "acquiring the indoor air density" specifically includes:
and acquiring the density of the inlet air of the indoor unit.
4. The cooling capacity determination method according to claim 2, wherein the step of "obtaining the air volume of the indoor unit" specifically includes:
and determining the air supply quantity of the indoor unit according to the model and the number of the air conditioners.
5. The refrigeration capacity determination method according to claim 2, wherein the step of obtaining the enthalpy value of the inlet air of the indoor unit specifically comprises:
acquiring the inlet air temperature and inlet air humidity of the indoor unit;
and determining the inlet air enthalpy value of the indoor unit according to the inlet air temperature and the inlet air humidity of the indoor unit.
6. The refrigeration capacity determination method according to claim 2, wherein the step of obtaining the air outlet enthalpy value of the indoor unit specifically comprises:
acquiring the air outlet temperature and the air outlet humidity of the indoor unit;
and determining the air outlet enthalpy value of the indoor unit according to the air outlet temperature and the air outlet humidity of the indoor unit.
7. A refrigeration energy efficiency ratio determination method for an air conditioner, characterized by comprising:
acquiring the refrigerating capacity of the air conditioner;
acquiring the power of the air conditioner;
calculating the ratio of the refrigerating capacity of the air conditioner to the power of the air conditioner, and recording as the refrigerating energy efficiency ratio;
wherein the cooling capacity of the air conditioner is determined by the cooling capacity determination method of any one of claims 1 to 6.
8. The refrigeration energy efficiency ratio determination method according to claim 7, wherein the step of "obtaining the power of the air conditioner" specifically includes:
acquiring a power supply current of the air conditioner;
acquiring a power supply voltage of the air conditioner;
and calculating the product of the power supply current of the air conditioner and the power supply voltage of the air conditioner, and recording as the power of the air conditioner.
9. A fault notification method for an air conditioner, the fault notification method comprising:
acquiring the refrigerating capacity of the air conditioner;
comparing the acquired refrigerating capacity of the air conditioner with a preset refrigerating capacity;
if the difference value between the preset refrigerating capacity and the obtained refrigerating capacity of the air conditioner is larger than a preset difference value, controlling the air conditioner to send out a fault prompt;
wherein the cooling capacity of the air conditioner is determined by the cooling capacity determination method of any one of claims 1 to 6.
10. A fault notification method for an air conditioner, the fault notification method comprising:
acquiring the refrigeration energy efficiency ratio of the air conditioner;
comparing the obtained refrigeration energy efficiency ratio of the air conditioner with a preset energy efficiency ratio;
if the obtained refrigeration energy efficiency ratio of the air conditioner is smaller than the preset energy efficiency ratio, controlling the air conditioner to send out a fault prompt;
wherein the refrigeration energy efficiency ratio of the air conditioner is determined by the refrigeration energy efficiency ratio determination method according to claim 7 or 8.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910833040.7A CN112443932A (en) | 2019-09-04 | 2019-09-04 | Refrigeration capacity determining method, refrigeration energy efficiency ratio determining method and fault reminding method |
| PCT/CN2020/095114 WO2021042793A1 (en) | 2019-09-04 | 2020-06-09 | Refrigeration capacity determination method, refrigeration energy efficiency ratio determination method, and failure notification method |
| EP20860858.8A EP4027069A4 (en) | 2019-09-04 | 2020-06-09 | Refrigeration capacity determination method, refrigeration energy efficiency ratio determination method, and failure notification method |
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| CN201910833040.7A CN112443932A (en) | 2019-09-04 | 2019-09-04 | Refrigeration capacity determining method, refrigeration energy efficiency ratio determining method and fault reminding method |
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| CN112443932A true CN112443932A (en) | 2021-03-05 |
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| Country | Link |
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| EP (1) | EP4027069A4 (en) |
| CN (1) | CN112443932A (en) |
| WO (1) | WO2021042793A1 (en) |
Cited By (1)
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| CN115183398A (en) * | 2022-07-29 | 2022-10-14 | 青岛海尔空调电子有限公司 | Air conditioner control method, device, equipment and medium |
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Also Published As
| Publication number | Publication date |
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| EP4027069A1 (en) | 2022-07-13 |
| EP4027069A4 (en) | 2022-11-09 |
| WO2021042793A1 (en) | 2021-03-11 |
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