A refrigerator energy efficiency rating classification method and test method

Abstract

The application discloses a refrigerator energy efficiency grade classification method and test method, comprising the following steps: step 1, determining the basic indicators for evaluating the energy efficiency of the refrigerator, including energy consumption, temperature control performance, refrigerant use, insulation material and compressor technology and the contribution of additional functions; step 2, calculating the energy consumption of the refrigerator; step 3, defining the target temperature range of the refrigeration chamber and the freezing chamber, and evaluating the temperature control performance by calculating the temperature difference degree; step 4, considering the type and amount of refrigerant, and calculating the environmental protection index of the refrigerant; step 5, considering the thermal conductivity of the insulation material and the efficiency of the compressor technology, and defining the weight; step 6, considering the contribution of the additional functions to the energy efficiency, defining the weight, and collecting the scores of each item, and dividing the energy efficiency grade according to the scores. The application can provide more accurate and comprehensive energy efficiency grade evaluation for the refrigerator by comprehensively considering various indicators and adjusting the importance of each factor according to the weight.

Description

Technical Field

[0001] This invention relates to the field of refrigerator energy efficiency technology, and in particular to a method and testing method for classifying and testing refrigerator energy efficiency levels. Background Technology

[0002] Refrigerator energy efficiency ratings are an evaluation system for refrigerator energy efficiency performance, usually represented by letter grades for easier consumer understanding. The energy efficiency rating is based on the refrigerator's energy consumption and performance under specific conditions. In general energy efficiency ratings, letters A to G are typically used, with A representing the highest energy efficiency and G representing the lowest. However, traditional refrigerator energy efficiency evaluation methods often only consider energy consumption, resulting in an incomplete assessment of the refrigerator's true performance. This makes it difficult for consumers to accurately understand the refrigerator's performance in actual use when purchasing one. Summary of the Invention

[0003] To address the above problems, this invention provides a method for classifying refrigerator energy efficiency levels.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A method for classifying the energy efficiency rating of a refrigerator includes the following steps:

[0006] Step 1: Determine the basic indicators for evaluating the refrigerator's energy efficiency, including energy consumption, temperature control performance, refrigerant usage, insulation materials and compressor technology, as well as the contribution of additional functions;

[0007] Step 2: Calculate the refrigerator's energy consumption:

[0008] Step 3: Define the target temperature range for the refrigerator and freezer compartments, and evaluate the temperature control performance by calculating the temperature difference.

[0009] Step 4: Consider the type and amount of refrigerant used, and calculate the environmental index of the refrigerant;

[0010] Step 5: Define weights considering the thermal conductivity of the insulation material and the efficiency of the compressor technology;

[0011] Step 6: Consider the contribution of additional functions to energy efficiency, define the weights, summarize the scores of each item, and determine the energy efficiency level based on the scores.

[0012] Furthermore: Step 1 includes:

[0013] Energy consumption refers to the electrical energy consumed by the refrigerator during operation, measured in kilowatt-hours (kWh), with a weight of w. energy ;

[0014] Temperature control performance reflects how well a refrigerator maintains its actual temperature at a set temperature. It uses temperature difference (TD) as the metric, with a weight of w. temperature ;

[0015] Refrigerant usage indicators are assessed using the refrigerant's Environmental Index (EI), which considers usage volume and global warming potential (GWP), with a weighting of w. refrigerant ;

[0016] The insulation materials and compressor technology use a comprehensive score (S) to reflect the combined performance of the thermal conductivity of the insulation materials and the efficiency of the compressor technology, with a weight of w. technology ;

[0017] The contribution of additional features is assessed by considering the benefits (AF) of the additional features, with a weight of w. features .

[0018] Furthermore: Step 2 includes:

[0019] Calculate the refrigerator's energy consumption using the following formula:

[0020] E = P × t

[0021] Where E is energy consumption (kilowatt-hours), P is the refrigerator's rated power (kilowatts), and t is usage time (hours).

[0022] Furthermore: Step 3 includes:

[0023] The following formula is used to calculate the temperature difference to evaluate the refrigerator's temperature control performance:

[0024] TD = T tsrget -T actual

[0025] Where TD is the temperature difference degree, T target It is the target temperature, T actual That's the actual temperature.

[0026] Furthermore, step 4 includes:

[0027] Considering the type and amount of refrigerant used, the environmental index of the refrigerant is calculated using the following formula:

[0028]

[0029] Among them, EI is the environmental index, Q is the amount of refrigerant used, GWP is the global warming potential of refrigerant, and V is the refrigerator volume.

[0030] Furthermore: Step 5 includes:

[0031] Considering the thermal conductivity of the insulation material and the efficiency of the compressor technology, weights are defined, and the overall score is calculated using the following formula:

[0032] S = w1 × thermal conductivity + w2 × compressor efficiency

[0033] Where S is the overall score, and w1 and w2 are the weights.

[0034] Furthermore: Step 6 includes:

[0035] Considering the contribution of additional features to energy efficiency, define weights and calculate the additional feature score using the following formula:

[0036] AF = w × Additional Functional Benefits

[0037] Where AF is the additional feature score, and w is the weight;

[0038] The various scores are combined and a comprehensive energy efficiency rating formula is used:

[0039] ER=w3×E+w4×TD+w5×EI+w6×S+w7×AF

[0040] Here, ER is the final energy efficiency rating, and w3, w4, w5, w6, and w7 are the weights of each indicator.

[0041] The technological advancements achieved by this invention compared to existing technologies are as follows:

[0042] This invention comprehensively considers factors such as energy consumption, temperature control performance, refrigerant usage, insulation materials and compressor technology, as well as additional functions, to more fully reflect the energy efficiency performance of the refrigerator.

[0043] This invention, by introducing weighting factors, allows for the adjustment of the influence of different indicators in the final score based on actual needs and user priorities, making the rating more aligned with real-world usage scenarios. The invention clearly outlines the calculation methods for each evaluation step using formulas, improving transparency and understandability, allowing users and manufacturers to clearly understand the contribution of each indicator to the final energy efficiency rating. This invention considers the environmental impact of refrigerant use, assessing the refrigerant's environmental friendliness through an environmental index, making the rating method more comprehensive and environmentally conscious. This invention can flexibly adjust various indicators and weights based on technological advancements and users' varying concerns about energy efficiency ratings, maintaining the method's adaptability. This invention incorporates consideration of additional functions, making the method more consistent with the multifunctional characteristics of modern refrigerators and better reflecting the actual user experience. Attached Figure Description

[0044] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0045] In the attached diagram:

[0046] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0047] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0048] like Figure 1 As shown in the figure, the present invention discloses a method for classifying the energy efficiency level of a refrigerator, comprising the following steps:

[0049] Step 1: Determine the basic indicators for evaluating the refrigerator's energy efficiency, including energy consumption, temperature control performance, refrigerant usage, insulation material quality, compressor technology, and the contribution of additional functions, and assign a weight to each indicator;

[0050] Step 2: Calculate the refrigerator's energy consumption:

[0051] Step 3: Define the target temperature range for the refrigerator and freezer compartments, and evaluate the temperature control performance by calculating the temperature difference.

[0052] Step 4: Consider the type and amount of refrigerant used, and calculate the environmental index of the refrigerant;

[0053] Step 5: Define weights considering the thermal conductivity of the insulation material and the efficiency of the compressor technology;

[0054] Step 6: Consider the contribution of additional functions to energy efficiency, define the weights, summarize the scores of each item, and determine the energy efficiency level based on the scores.

[0055] This invention provides a more accurate and comprehensive energy efficiency rating assessment for refrigerators by comprehensively considering various indicators and adjusting the importance of each factor according to weight.

[0056] Specifically, step 1 includes:

[0057] Energy consumption: Energy consumption refers to the electrical energy consumed by the refrigerator during operation, usually measured in kilowatt-hours (kWh). To reflect its importance, energy consumption is given a relatively high weight, let's assume the weight is w. energy .

[0058] Temperature control performance: Temperature control performance reflects the actual temperature maintenance of the refrigerator at the set temperature, using temperature difference (TD) as the indicator. Due to its importance to food preservation, temperature control performance is given a high weight, assumed to be w. temperature .

[0059] Refrigerant Usage: Refrigerant usage is assessed using the refrigerant's Environmental Index (EI), taking into account usage and global warming potential (GWP). Environmental friendliness is crucial for energy efficiency assessments; therefore, refrigerant usage is given a high weight, assumed to be w. refrigerant .

[0060] Insulation Materials and Compressor Technology: A comprehensive score (S) is used to reflect the combined performance of the thermal conductivity of insulation materials and the efficiency of compressor technology. Insulation materials and compressor technology have a significant impact on overall performance and are given a high weight, assumed to be w. technology .

[0061] Contribution of Additional Functions: The contribution of additional functions to energy efficiency is assessed by considering their benefits (AF). The contribution of additional functions is also important for improving energy efficiency and is given a high weight, assuming a weight of w. features .

[0062] Specifically, step 2 includes:

[0063] This step will explain how to use the formula to calculate the refrigerator's energy consumption.

[0064] Calculate the refrigerator's energy consumption using the following formula:

[0065] E = P × t

[0066] Where E is energy consumption in kilowatt-hours (kWh), P is the refrigerator's rated power in kilowatts (kW), and t is usage time in hours (h).

[0067] The implementation steps are as follows:

[0068] Find the refrigerator's rated power (P): This is the power consumed by the refrigerator under normal operating conditions. You can find this value in the product specifications or energy efficiency label.

[0069] Determine usage time (t): Usage time refers to the operating time of the refrigerator within a specific time period, which can be determined based on user habits, statistical data, or simulation experiments.

[0070] Substitute the values ​​into the formula to calculate the energy consumption (E).

[0071] For example: Suppose the refrigerator has a rated power of 0.5 kilowatts and a usage time of 24 hours.

[0072] Therefore, the refrigerator consumes 12 kilowatt-hours of energy during this period:

[0073] E = 0.5kW × 24h = 12kWh

[0074] The purpose of this step is to quantify the refrigerator’s energy efficiency by examining its energy consumption. Throughout the evaluation, energy consumption will be used along with other indicators to calculate the final energy efficiency rating.

[0075] Specifically, step 3 includes:

[0076] This step will explain how to evaluate the temperature control performance of a refrigerator by calculating the temperature difference.

[0077] The following formula is used to calculate the temperature difference to evaluate the refrigerator's temperature control performance:

[0078] TD = T target -T actual

[0079] TD stands for Temperature Difference, used to evaluate the temperature control performance inside a refrigerator. target Target temperature, the user-set desired temperature, T actual Actual temperature: The current actual temperature inside the refrigerator.

[0080] The implementation steps are as follows:

[0081] Define the target temperature range: Determine the target temperature range for the refrigerator and freezer compartments. These temperatures are usually set by the user or comply with food safety standards.

[0082] Real-time temperature monitoring: Use temperature sensors and other equipment to monitor the actual temperature of the refrigerator and freezer compartments in real time.

[0083] Calculate the temperature difference: Using the above formula, calculate the difference between the target temperature and the actual temperature to obtain the temperature difference.

[0084] For example: Suppose a user sets the target temperature for the refrigerator compartment to 4 degrees Celsius, but the actual temperature is 6 degrees Celsius:

[0085] TD = 4 - 6 = -2

[0086] Therefore, the temperature difference is -2 degrees Celsius. A negative value indicates that the actual temperature is lower than the target temperature, while a positive value indicates that the actual temperature is higher than the target temperature.

[0087] The purpose of this step is to quantify the refrigerator's temperature control performance by measuring temperature differences, providing key indicators for subsequent energy efficiency rating calculations.

[0088] Specifically, step 4 includes:

[0089] This step will explain how to calculate the environmental index of a refrigerant by taking into account the type and amount of refrigerant used.

[0090] Considering the type and amount of refrigerant used, the environmental index of the refrigerant is calculated using the following formula:

[0091]

[0092] Among them, EI is the Environmental Impact Index, which reflects the potential environmental impact of refrigerants; Q is the amount of refrigerant used, which may be in grams or kilograms; GWP is the global warming potential of refrigerants; and V is the refrigerator volume, which is in cubic meters.

[0093] The implementation steps are as follows:

[0094] Obtain the refrigerant usage Q: Obtain the actual amount of refrigerant used in the refrigerator. This can be obtained from the specifications provided by the manufacturer or through laboratory testing.

[0095] Obtain the Global Warming Potential (GWP) of the refrigerant: Obtain the global warming potential value of the refrigerant used, which can usually be obtained from environmental organizations or relevant databases.

[0096] Obtaining the refrigerator's volume V: This refers to the internal volume of the refrigerator, usually expressed in cubic meters. It can be obtained through product specifications or measurement.

[0097] Substitute the data into the formula for calculation: Substitute the obtained refrigerant usage, global warming potential, and refrigerator volume into the formula to calculate the environmental index (EI).

[0098] For example: Assume the amount of refrigerant used, Q, is 200 grams, the global warming potential (GWP) of the refrigerant is 1500, and the refrigerator volume, V, is 0.02 cubic meters.

[0099]

[0100] Therefore, the Environmental Index (EI) is 15,000,000.

[0101] The purpose of this step is to calculate the environmental index by taking into account the type and amount of refrigerant used, thereby providing a more comprehensive environmental assessment of the refrigerator's energy efficiency rating.

[0102] Specifically, step 5 includes:

[0103] This step will explain how to calculate the overall score by taking into account the thermal conductivity of the insulation material and the efficiency of the compressor technology.

[0104] Considering the thermal conductivity of the insulation material and the efficiency of the compressor technology, weights are defined, and the overall score is calculated using the following formula:

[0105] S = w1 × thermal conductivity + w2 × compressor efficiency

[0106] Here, S is the overall score, which reflects the combined impact of insulation materials and compressor technology on energy efficiency; thermal conductivity is the thermal conductivity of insulation materials, which measures their impact on heat transfer; compressor efficiency is the efficiency of compressor technology, which reflects its performance in energy conversion; and w1 and w2 are weights used to adjust the relative importance of thermal conductivity and compressor efficiency in the overall score.

[0107] The implementation steps are as follows:

[0108] Obtain the values ​​for thermal conductivity and compressor efficiency:

[0109] The thermal conductivity of insulating materials can be obtained from material specifications or experimental measurements; the efficiency value can be obtained by examining the compressor technology used in refrigerators.

[0110] Assign weights to thermal conductivity and compressor efficiency respectively:

[0111] Based on actual needs and user priorities, weights are assigned to thermal conductivity w1 and compressor efficiency w2 respectively.

[0112] Substitute into the formula to calculate:

[0113] Substitute the obtained thermal conductivity, compressor efficiency, and weights into the formula to calculate the comprehensive score S.

[0114] For example:

[0115] Assuming a thermal conductivity of 0.02 W / (m·K), a compressor efficiency of 0.9, a weight of 0.6 for w1, and a weight of 0.4 for w2.

[0116] S=0.6×0.02+0.4×0.9=0.012+0.36=0.372

[0117] Therefore, the overall score S is 0.372.

[0118] The purpose of this step is to provide a comprehensive evaluation index for the energy efficiency rating of a refrigerator by taking into account the performance of insulation materials and compressor technology.

[0119] Specifically, step 6 includes:

[0120] This step details how to calculate the additional features score by considering the contribution of additional features to energy efficiency. To consider the contribution of additional features to energy efficiency, weights are defined, and the additional features score is calculated using the following formula:

[0121] AF = w × Additional Functional Benefits

[0122] Here, AF is the additional function score, which reflects the contribution of additional functions to energy efficiency, and w is the weight, which is used to adjust the relative importance of the benefits of additional functions in the overall score.

[0123] The implementation steps are as follows:

[0124] Define the benefits of additional features: Evaluate the actual contribution of additional features to the refrigerator's energy efficiency, which may include features such as rapid freezing and smart control.

[0125] Assign weights to additional feature benefits: Assign weights to additional feature benefits w based on actual needs and user priorities.

[0126] Substitute into the formula for calculation: Substitute the acquired additional function benefits and weights into the formula to calculate the additional function AF.

[0127] For example: Suppose the benefit of the additional features is 0.8 and the weight w is 0.3.

[0128] AF = 0.3 × 0.8 = 0.24

[0129] Therefore, the additional features score (AF) is 0.24.

[0130] Final score and rating

[0131] The final ER score takes into account all the scores and is calculated using the following formula:

[0132] ER=w3×E+w4×TD+w5×EI+w6×S+w7×AF

[0133] Here, ER is the final energy efficiency rating, and w3, w4, w5, w6, and w7 are the weights of each indicator.

[0134] Finally, energy efficiency levels are determined based on the ratings, for example:

[0135] ER ≥ 90 points: Grade A

[0136] 80≤ER<90 points: Grade B

[0137] 70≤ER<80 points: Grade C

[0138] 60≤ER<70 points: Grade D

[0139] ER < 60 points: Grade E

[0140] The purpose of this step is to incorporate the contribution of additional features to energy efficiency into the final rating, providing a more comprehensive assessment of the refrigerator's energy efficiency level.

[0141] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for classifying the energy efficiency rating of refrigerators, characterized in that, Includes the following steps: Step 1: Determine the basic indicators for evaluating the refrigerator's energy efficiency, including energy consumption, temperature control performance, refrigerant usage, insulation materials and compressor technology, as well as the contributions of additional features, including: Energy consumption refers to the electrical energy consumed by the refrigerator during operation, measured in kilowatt-hours, with a weight of w. energy ; Temperature control performance reflects how well a refrigerator maintains its actual temperature at a set temperature. It uses temperature difference (TD) as the indicator, with a weight of w. temperature ; Refrigerant usage indicators are assessed using the refrigerant's Environmental Index (EI), which considers usage volume and global warming potential (GWP), with a weighting of w. refrigerant ; The insulation materials and compressor technology use a comprehensive score S to reflect the combined performance of the thermal conductivity of the insulation materials and the efficiency of the compressor technology, with a weight of w. technology ; The contribution of additional features is assessed by considering the benefits (AF) of the additional features, with a weight of w. features ; Step 2: Calculate the refrigerator's energy consumption: Step 3: Define the target temperature range for the refrigerator and freezer compartments, and evaluate the temperature control performance by calculating the temperature difference. Step 4: Considering the type and amount of refrigerant used, calculate the refrigerant's environmental index, including: Considering the type and amount of refrigerant used, the environmental index of the refrigerant is calculated using the following formula: in, It is an environmental protection index. This refers to the amount of refrigerant used. The global warming potential of refrigerants This refers to the refrigerator's volume; Step 5: Considering the thermal conductivity of the insulation material and the efficiency of the compressor technology, define weights, including: Considering the thermal conductivity of the insulation material and the efficiency of the compressor technology, weights are defined, and the overall score is calculated using the following formula: Where S is the overall score, and w1 and w2 are the weights; Step 6: Consider the contribution of additional features to energy efficiency, define weights, summarize the scores for each item, and determine the energy efficiency level based on the scores, including: Considering the contribution of additional features to energy efficiency, define weights and calculate the additional feature score using the following formula: in, It is the score for additional features. It is weight; The various scores are combined and a comprehensive energy efficiency rating formula is used: ER is the final energy efficiency rating. , , , , It is the weight of each indicator.

2. The method for classifying refrigerator energy efficiency levels according to claim 1, characterized in that, Step 2 includes: Calculate the refrigerator's energy consumption using the following formula: Where E is energy consumption, P is the refrigerator's rated power, and t is the usage time.

3. The method for classifying refrigerator energy efficiency levels according to claim 2, characterized in that, Step 3 includes: The following formula is used to calculate the temperature difference to evaluate the refrigerator's temperature control performance: in, It is the degree of temperature difference. It is the target temperature. That's the actual temperature.

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