Method for calculating carbon effect grade index value of refrigerator and method for evaluating low-carbon performance of refrigerator

Abstract

The invention discloses a method for calculating a carbon effect grade index value of a refrigerator and a method for evaluating the low-carbon performance of the refrigerator, and the method comprises the steps: firstly, calculating the carbon effect ratio of the refrigerator by taking the carbon effect ratio of the refrigerator as a technical parameter of carbon effect grading; and then counting carbon-effect ratio data of carbon emission, service life and effective volume of a plurality of refrigerators with different design temperatures, grouping according to the types of the design temperatures of the refrigerators, dividing the carbon-effect grades of each type of refrigerators into five grades, and optimizing the first grade of the carbon-effect grade. Determining index values of the refrigerators with single design temperatures by the aid of sorting processes; the index value of the refrigerator with multiple chambers and multiple design temperatures is determined by adopting a volume weighting coefficient method. The method can be suitable for carbon footprint grading of refrigerators with different service lives, different effective volumes and various designed temperatures. The invention also discloses a method for evaluating the low-carbon performance of the refrigerator by adopting the carbon effect grade index value.

Description

Technical Field

[0001] The present invention relates to the field of refrigerator carbon footprint classification, and in particular to a method for calculating a refrigerator carbon efficiency rating index value and a method for evaluating a refrigerator low-carbon performance. Background Art

[0002] At present, there is no standard for refrigerator carbon efficiency rating or calculation method for refrigerator carbon efficiency rating index value. There are mainly two similar methods:

[0003] (1) Sorting method

[0004] The sorting method counts the index values ​​of a large number of cases, sorts the index values ​​from high to low, and takes the data in the characteristic position in the sorting as the index values ​​of each level. For example, the standard GB 21455-2019 "Energy Efficiency Limit Values ​​and Energy Efficiency Grades of Room Air Conditioners" stipulates that the annual energy consumption efficiency (APF) index value of heat pump type room air conditioners with a rated cooling capacity of less than or equal to 4500W and a level 2 energy efficiency is 4.50. When the standard was developed, the index value was designed based on the fact that about 20% of air conditioner products can meet it. The sorting method is widely used in product performance classification and grading. By analyzing a large number of case data, the top 20%, 40%, and 60% values ​​can be obtained to meet different grading requirements.

[0005] (2) Coefficient method

[0006] The coefficient method obtains the industry representative value of the indicator by statistically analyzing a large amount of data, and uses the ratio of the measured value to the industry representative value as the coefficient, and classifies and grades the indicators by adjusting the coefficient. For example, the standard GB 12021.2-2015 "Limited values ​​of power consumption and energy efficiency grades for household refrigerators" stipulates that for a horizontal refrigerator-freezer with a level 1 energy efficiency, the standard energy efficiency index η s Less than or equal to 35%. The standard energy efficiency index of refrigerators is η s Calculate according to the following formula:

[0007] η s =E s / E base- ×100%

[0008] Where:

[0009] η s - Standard energy efficiency index;

[0010] E s - Standard power consumption (measured value), in kilowatt-hours per 24 hours (kw·h / 24h)

[0011] E base- Baseline power consumption (industry representative value), unit is kilowatt-hour per 24 hours (kW·h / 24h)

[0012] The coefficient method is also a commonly used method for classifying product performance. By deriving the industry representative value from a large amount of case data, and using the ratio of the measured value to the industry representative value as the coefficient and the index value, different intervals such as ≤50%, 50%~60%, 60%~70% can be obtained for product classification.

[0013] The product structure of household refrigerators has the following characteristics: 1. The effective volume of the compartments of refrigerators of different models is inconsistent; 2. The refrigerator may have a multi-compartment structure, and the design temperature of each compartment is different.

[0014] The carbon emissions of refrigerators have the following characteristics: 1. Carbon emissions of refrigerators are mainly concentrated in the use stage; 2. When other parameters remain unchanged, the larger the effective volume of the refrigerator, the greater the power consumption and the greater the carbon emissions; 3. When other parameters remain unchanged, the lower the design temperature of the refrigerator, the greater the power consumption and the greater the carbon emissions;

[0015] Therefore, using the above method to determine the refrigerator carbon efficiency rating index has the following disadvantages:

[0016] 1. Sorting method

[0017] By counting the carbon emissions of a large number of refrigerators and using the size of the product's carbon emissions as an indicator value to classify them, it is not possible to fully evaluate the low-carbon level of refrigerators. The ranking method only considers the total carbon emissions of refrigerators, not the functional units of refrigerators. The larger the specifications (capacity), the greater the product's carbon emissions; the longer the service life, the greater the product's carbon emissions; the lower the compartment design temperature, the greater the product's carbon emissions.

[0018] 2. Coefficient method

[0019] The coefficient method requires statistics of a large amount of data to derive an industry representative value for refrigerator carbon emissions. Currently, there is no public calculation method. Summary of the invention

[0020] One of the purposes of the present invention is to provide a method for calculating the carbon efficiency rating index value of a refrigerator, the method adopts the refrigerator carbon efficiency ratio as the technical parameter for carbon efficiency classification, adopts the sorting method to determine the index value for refrigerators with a single design temperature, and adopts the volume weighted coefficient method to determine the index value for refrigerators with multiple compartments and multiple design temperatures. The method is applicable to the carbon footprint classification of refrigerators with different service lives, different effective volumes, and multiple design temperatures.

[0021] The above object of the present invention is achieved by the following technical solution: a method for calculating the carbon efficiency rating index value of a refrigerator, characterized in that the calculation method comprises the following steps:

[0022] Step (1), define the carbon efficiency ratio (CER) of a refrigerator as the carbon dioxide equivalent emitted by a refrigerator per unit volume of storage space provided per unit time.

[0023] The calculation formula of refrigerator carbon efficiency ratio CER is as follows:

[0024]

[0025] Where:

[0026] CER—Refrigerator Carbon Efficiency Ratio, in kilograms of carbon dioxide equivalent per liter per year: [kgCO 2 e / (L·a)】;

[0027] PCE-carbon emissions during the refrigerator product life cycle, in kilograms of carbon dioxide equivalent: (kgCO 2 e);

[0028] V-effective volume of the refrigerator, in liters: (L);

[0029] L- refrigerator service life, in years: (a);

[0030] Step (2), collecting data on carbon emissions, service life and carbon efficiency ratio of effective volume of multiple refrigerators with different design temperatures, and grouping refrigerators according to their design temperatures, dividing the carbon efficiency level j of each type of refrigerator into 5 levels, where the values ​​of j are 1, 2, 3, 4 and 5, respectively, and carbon efficiency level 1 is the best;

[0031] Step (3): the carbon efficiency rating index value CER of a refrigerator with a single design temperature i,j , where subscript i represents the refrigerator of type i with a single design temperature, subscript j represents the carbon efficiency grade, and the ranking method is used to determine the carbon efficiency grade index value, and the maximum value in the data set with the smallest 5% carbon efficiency ratio is selected as the index value of grade 1 carbon efficiency, that is, 5% of the products meet the grade 1 carbon efficiency requirements; similarly, the carbon efficiency index values ​​of grades 2, 3, 4, and 5 are taken as the maximum values ​​in the data sets with the smallest 20%, 40%, 60%, and 80% carbon efficiency ratios as the corresponding index values ​​of grades 2, 3, 4, and 5;

[0032] Step (4): Carbon efficiency rating index value CER for refrigerators with multiple design temperature compartments d,j, where subscript d represents a refrigerator with multiple design temperature compartments of the dth type, and subscript j represents the carbon efficiency grade. Based on the carbon efficiency grade index value of the refrigerator with a single design temperature obtained in step (3), the carbon efficiency ratio of the refrigerator with a single design temperature of m types with the same design temperature as the corresponding compartment in the multiple design temperature compartments is selected, where m is a subset of i, and m types are two or more types in i. The carbon efficiency grade index value of the refrigerator with multiple design temperature compartments is calculated using the effective volume weighted coefficient method. The specific calculation formula is as follows:

[0033]

[0034] Where:

[0035] CER d,j --The carbon efficiency index value of refrigerators with multiple design temperature compartments, that is, the index value of the carbon efficiency of the j-level refrigerator with multiple design temperature compartments of type d, in kilograms of carbon dioxide equivalent per liter per year: [kgCO 2 e / (L·a)】;

[0036] V i -- For refrigerators with multiple design temperature compartments, the effective volume of the i-th design temperature compartment, in litres: (L);

[0037] V--The sum of the effective volumes of refrigerators with multiple design temperature compartments, in liters: (L);

[0038] CER i,j —The carbon efficiency index value of a refrigerator with a single design temperature, that is, the carbon efficiency index value of the j-level refrigerator with a single design temperature of the i-th type, in kilograms of carbon dioxide equivalent per liter per year: [kgCO 2 e / (L·a)].

[0039] In the present invention, various refrigerators with different design temperature types are shown in the following table:

[0040] Design temperature type i type Design temperature Tc / ℃ 1 Cold room 4 2 Cooling room 12 3 Ice House 2 4 Ice Room 0 5 0 star room 0 6 1 star room -6 7 2 star room -12 8 3, 4 star rooms -18 9 Wine storage room 12 10 Multiple design temperature chambers Amorphous

[0041] In the present invention, the refrigerator with a single design temperature includes 9 types of refrigerators, including a refrigerating room, a cooling room, an ice room, an ice making room, a wine storage room, a 0-star room, a 1-star room, a 2-star room, and a 3- and 4-star room, and i=1-9.

[0042] A second object of the present invention is to provide a method for evaluating the low-carbon performance of a refrigerator.

[0043] The above-mentioned object of the present invention is achieved by the following technical scheme: a method for evaluating the low-carbon performance of a refrigerator by using the carbon efficiency grade index value obtained by the above-mentioned calculation method, characterized in that: the method selects the carbon efficiency grade index value of grade j as the basis for evaluating the low-carbon performance of the refrigerator, compares the carbon efficiency ratio of the refrigerator to be evaluated calculated by step (1) with the carbon efficiency grade index value of grade j, if the carbon efficiency ratio CER of the refrigerator is less than the carbon efficiency grade index value of grade j, then it is considered that the refrigerator meets the carbon efficiency requirements of grade j and is a low-carbon performance product; if the carbon efficiency ratio CER of the refrigerator is greater than the carbon efficiency grade index value of grade j, then it is considered that the refrigerator does not meet the carbon efficiency requirements of grade j and is not a low-carbon performance product.

[0044] With reference to the energy efficiency labeling system and energy-saving certification implementation rules, grade j is taken as level 2, and the carbon efficiency level 2 index value is used as the low-carbon product evaluation value.

[0045] Compared with the prior art, the present invention has the following significant effects:

[0046] 1. Simple and direct: Using the single comprehensive technical parameter of refrigerator carbon efficiency ratio (CER) to measure the low-carbon performance of products, and conducting complex scoring and grading methods such as carbon efficiency grading and low-carbon / zero-carbon enterprise evaluation is simpler, more direct and easy to understand.

[0047] 2. Scientific and reasonable: The carbon efficiency ratio of refrigerators is defined as the carbon dioxide equivalent emitted by refrigerators per unit volume of storage space per unit time, in kilograms of carbon dioxide equivalent per liter per year: [kgCO 2 e / (L·a)】, which takes into account both the carbon emissions of the refrigerator and the functional unit of the refrigerator. Compared with the expression of formula (2) in T / CHEAA 0028-2023 "Detailed Rules for Calculating Carbon Footprint of Household Appliances - Refrigerators", the present invention adds a limit per unit time, and will not cause the wrong guidance that refrigerators with the same effective volume have less low-carbon properties as their lifespans increase. Document ZL 2022 1 1322209.0 "Method for Measuring Carbon Efficiency of Refrigerator and Method for Evaluating Low-Carbon Performance of Refrigerator" defines the carbon efficiency of refrigerators as the carbon dioxide equivalent emitted by the refrigerator per unit adjusted volume to meet user needs, based on the life cycle perspective, in units of kgCO 2 e / L; Using the adjusted volume as the functional unit of the refrigerator, it is ostensibly to comprehensively consider the characteristic temperature of each compartment of the refrigerator, the number of doors opened and other user needs, but can the adjusted volume reflect the degree to which the refrigerator meets user needs? Does the larger the adjusted volume, the larger the functional unit? The document does not explain the principle and calculation method.

[0048] 3. Strong versatility: The carbon efficiency ratio of refrigerators is used to determine the carbon efficiency grade index value. The present invention divides refrigerators into 10 categories according to the design temperature of refrigerator compartments. Among them, categories 1 to 9 are refrigerators with a single design temperature, and the carbon efficiency grade index value can be determined by the sorting method. The 10th category is refrigerators with multiple design temperature compartments, and the carbon efficiency grade index value is calculated using the effective volume weighted coefficient method. The carbon efficiency grade index value of refrigerators with any limited volume and any design temperature compartment combination can be calculated. The 10th category may include refrigerators with multiple design temperature compartments, and its serial number may be 10., 11, 12, etc.

[0049] The invention has the characteristics of being simple, direct, scientific, reasonable, and highly versatile, and has significant application value in refrigerator carbon footprint classification and low-carbon product evaluation and certification. DETAILED DESCRIPTION

[0050] The calculation method of the carbon efficiency grade index value of the refrigerator of the present invention is as follows:

[0051] (1) The carbon emissions, service life, effective volume of compartments, and design temperature of compartments of refrigerators are shown in the following table. Five refrigerators with a single design temperature are selected here, and their serial numbers are not numbered consecutively in order to correspond to the table in the invention content. Two refrigerators with multiple design temperature compartments are selected, and their serial numbers are 10 and 11 respectively.

[0052]

[0053]

[0054] (2) Calculate the carbon efficiency of the refrigerator according to the formula:

[0055]

[0056] CER—Refrigerator Carbon Efficiency Ratio, in kilograms of carbon dioxide equivalent per liter per year: kgCO 2 e / (L·a). PCE-carbon emissions of refrigerator products during their life cycle, in kilograms of carbon dioxide equivalent: (kgCO 2 e) V-effective volume of refrigerator, in liters: (L)

[0057] L- refrigerator service life, in years: (a)

[0058] Carbon Efficiency Ratio (CER) of refrigerator No. 1 1 for

[0059] CER 1 =824÷378÷8=0.2725kgCO 2 e / (L·a)

[0060] Carbon Efficiency Ratio (CER) of refrigerator No. 5 5 for

[0061] CER 5 =1741÷405÷10=0.4299kgCO 2 e / (L·a)

[0062] Carbon Efficiency Ratio (CER) of refrigerator No. 10 10 for

[0063] CER 10 =1596÷(252+265)÷8=0.4263kgCO 2 e / (L·a)

[0064] Carbon Efficiency Ratio (CER) of refrigerator No. 11 11 for

[0065] CER 11 =1086÷(181+33+98)÷8=0.4351kgCO 2 e / (L·a)

[0066] The carbon efficiency ratios of the remaining refrigerators are calculated in the same way, and the results are shown in the following table.

[0067]

[0068]

[0069] (3) Statistical data on carbon emissions, service life and carbon efficiency ratio of effective volume of multiple refrigerators with different design temperatures are collected, and the carbon efficiency level j of each type of refrigerator is divided into 5 levels according to the type of refrigerator design temperature. The values ​​of j are 1, 2, 3, 4 and 5 respectively, among which carbon efficiency level 1 is the best. The statistical calculation list of carbon efficiency ratio data of multiple refrigerators with different design temperatures is as follows:

[0070]

[0071]

[0072] (4) Carbon efficiency rating index value CER for refrigerators with a single design temperature i,j , where subscript i represents the i-th type of refrigerator with a single design temperature, the value range of i is i=1~9, and subscript j represents the carbon efficiency level, j=1,2,3,4,5.

[0073] In this embodiment, not all 9 refrigerators with a single design temperature are selected, but only 5 of them are selected, i=1, 5, 6, 8.9, and the ranking method is used to determine the carbon efficiency grade index value, and the maximum value in the data set with the smallest 5% carbon efficiency ratio is selected as the index value of grade 1 carbon efficiency, that is, 5% of the products meet the grade 1 carbon efficiency requirements; similarly, the carbon efficiency index values ​​of grades 2, 3, 4, and 5 are respectively taken as the maximum values ​​in the data sets with the smallest 20%, 40%, 60%, and 80% carbon efficiency ratios as the corresponding index values ​​of carbon efficiency grades 2, 3, 4, and 5.

[0074] The carbon efficiency rating index value CER of the five refrigerators with a single design temperature is obtained from the table data in step (3). i,j (i=1,5,6,8.9;j=1,2,3,4,5)as shown in the following table.

[0075]

[0076] (5) Carbon efficiency rating index value CER for refrigerators with multiple design temperature compartments d,j , where subscript d represents a refrigerator with multiple design temperature compartments of type d, and subscript j represents the carbon efficiency grade.

[0077] In this embodiment, the values ​​of d are 10 and 11, which are the 10th and 11th categories respectively. Here, only the refrigerator with serial number 11 is used as an example for calculation. Therefore, in this embodiment, CER d,j CER 11,j , that is, the refrigerator with serial number 11 is a refrigerator with three design temperature compartments.

[0078] The carbon efficiency rating index value CER of the refrigerator with a single design temperature obtained in step (4) is i,j On this basis, select the carbon efficiency ratios of three types of refrigerators with the same design temperature as the corresponding compartments in the three design temperature compartments, that is, select the carbon efficiency ratios of the three types of refrigerators with a single design temperature, that is, i = 1, 6, 8, and use the effective volume weighted coefficient method to calculate the carbon efficiency grade index value of the refrigerator with multiple design temperature compartments. The specific calculation formula is as follows:

[0079]

[0080] Where:

[0081] CER 11,j --Carbon efficiency rating index value for refrigerators with multiple design temperature compartments, i.e., the index value of Class J carbon efficiency for refrigerators with multiple design temperature compartments of Category 11, in kilograms of carbon dioxide equivalent per liter per year: [kgCO 2 e / (L·a)】;

[0082] Vi --The effective volume of the i-th design temperature compartment of a refrigerator with multiple design temperature compartments is in liters (L). In the refrigerator with multiple design temperature compartments of this embodiment, i=1, 6, 8, corresponding to the 1st, 6th, and 8th refrigerators with a single design temperature, respectively.

[0083] V--The sum of the effective volumes of refrigerators with multiple design temperature compartments, i.e., the total volume, in liters: (L);

[0084] CER i,j —The carbon efficiency index value of a refrigerator with a single design temperature, that is, the carbon efficiency index value of the j-level refrigerator with the i-th design temperature, i = 1, 6, 8, in kilograms of carbon dioxide equivalent per liter per year: [kgCO 2 e / (L·a)].

[0085] The relevant information of refrigerator No. 11 is as follows:

[0086]

[0087] Carbon efficiency rating index value CER for refrigerators with a single design temperature (i = 1, 5, 6, 8, 9) i,j See the table in step (4).

[0088] For the refrigerator with three design temperature compartments, the carbon efficiency rating index value CER of No. 11 d,j (CER 11,j ), substitute the data and calculate

[0089] V = 181 + 33 + 98 = 312L

[0090] V 1 =181L

[0091] The weighted coefficient of the effective volume of the 4℃ design temperature compartment is 181÷312=0.580

[0092] V 6 =33L

[0093] The effective volume weighting coefficient of the -6℃ design temperature compartment is 33÷312=0.106

[0094] V 8 =98L

[0095] The weighted coefficient of effective volume of the -18℃ design temperature compartment is 98÷312=0.314

[0096] Calculate the first-level carbon efficiency index value of refrigerator No. 11

[0097] CER 11,1=0.580×CER 1,1 +0.106×CER 6,1 +0.314×CER 8,1

[0098] =0.580×0.260+0.106×0.430+0.314×0.550

[0099] =0.1508+0.0455+0.1728

[0100] =0.3691kgCO 2 e / (L·a)

[0101] According to this method, the index values ​​of carbon efficiency levels 2, 3, 4, and 5 of refrigerator No. 11 are calculated, and the index values ​​are retained to 3 decimal places. The results are summarized in the following table:

[0102]

[0103] As calculated above, the carbon efficiency of refrigerator No. 11 is 0.4351 kgCO 2 e / (L·a). This carbon efficiency ratio is less than the carbon efficiency level 3 value, which meets the requirements of carbon efficiency level 3. However, it is greater than the carbon efficiency level 2 value, which does not meet the requirements of carbon efficiency level 2.

[0104] (6) Take the carbon efficiency rating level 2 index value as the low-carbon product evaluation value, and implement carbon efficiency grading and low-carbon product evaluation on the refrigerator carbon efficiency ratio CER calculated in the previous step (2) of the case. If the refrigerator carbon efficiency ratio CER is less than the carbon efficiency rating index value of level 2, it is considered that the refrigerator meets the carbon efficiency requirements of level 2 and is a low-carbon performance product; if the refrigerator carbon efficiency ratio CER is greater than the carbon efficiency rating index value of level 2, it is considered that the refrigerator does not meet the carbon efficiency requirements of level 2 and is not a low-carbon performance product. The specific evaluation results are summarized in the following table:

[0105]

[0106] The above embodiments of the present invention are not intended to limit the protection scope of the present invention, and the implementation modes of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structures of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, should fall within the protection scope of the present invention.

Claims

1. A method for calculating the carbon efficiency rating index value of a refrigerator, characterized in that: The calculation method includes the following steps: Step (1), define the carbon efficiency ratio (CER) of a refrigerator as the carbon dioxide equivalent emitted by a refrigerator per unit volume of storage space provided per unit time. The calculation formula of refrigerator carbon efficiency ratio CER is as follows: Where: CER—carbon efficiency ratio of refrigerators, in kilograms of carbon dioxide equivalent per liter per year; PCE-carbon emissions of refrigerator products during their life cycle, in kilograms of carbon dioxide equivalent; V-effective volume of the refrigerator, in liters; L- refrigerator service life, in years; Step (2), collecting data on carbon emissions, service life and carbon efficiency ratio of effective volume of multiple refrigerators with different design temperatures, and grouping refrigerators according to their design temperatures, dividing the carbon efficiency level j of each type of refrigerator into 5 levels, where the values ​​of j are 1, 2, 3, 4 and 5, respectively, and carbon efficiency level 1 is the best; Step (3): the carbon efficiency rating index value CER of a refrigerator with a single design temperature i,j , where the subscript i represents the refrigerator of the i-th type with a single design temperature. The ranking method is used to determine the carbon efficiency grade index value, and the maximum value in the data set with the smallest 5% carbon efficiency ratio is selected as the index value of grade 1 carbon efficiency, that is, 5% of the products meet the grade 1 carbon efficiency requirements; similarly, the carbon efficiency index values ​​of grades 2, 3, 4, and 5 are taken as the maximum values ​​in the data sets with the smallest 20%, 40%, 60%, and 80% carbon efficiency ratios as the corresponding index values ​​of grades 2, 3, 4, and 5; Step (4): Carbon efficiency rating index value CER for refrigerators with multiple design temperature compartments d,j , where the subscript d represents a refrigerator with multiple design temperature compartments of the dth type. Based on the carbon efficiency rating index value of the refrigerator with a single design temperature obtained in step (3), the carbon efficiency ratio of the refrigerator with a single design temperature of m types with the same design temperature as the corresponding compartment in the multiple design temperature compartments is selected, where m is a subset of i, and m types are two or more types in i. The carbon efficiency rating index value of the refrigerator with multiple design temperature compartments is calculated using the effective volume weighted coefficient method. The specific calculation formula is as follows: Where: CER d,j --The carbon efficiency rating index value for refrigerators with multiple design temperature compartments is in kilograms of carbon dioxide equivalent per litre per year; V i -- For refrigerators with multiple design temperature compartments, the effective volume of the i-th design temperature compartment, in litres: V--the sum of the effective volumes of refrigerators with multiple design temperature compartments, in liters; CER i,j —Carbon efficiency rating index value for refrigerators with a single design temperature, in kilograms of carbon dioxide equivalent per litre per year.

2. The calculation method according to claim 1, characterized in that: The refrigerators with a single design temperature include 9 types of refrigerators, including a refrigerating room, a cooling room, an ice room, an ice making room, a wine storage room, a 0-star room, a 1-star room, a 2-star room, and a 3- and 4-star room, where i=1-9.

3. A method for evaluating the low carbon performance of a refrigerator using the carbon efficiency grade index value obtained by the calculation method of claim 1, characterized in that: The method selects the carbon efficiency rating index value of level j as the basis for evaluating the low-carbon performance of refrigerators, and compares the carbon efficiency ratio of the refrigerator to be evaluated calculated in step (1) with the carbon efficiency rating index value of level j. If the carbon efficiency ratio CER of the refrigerator is less than the carbon efficiency rating index value of level j, it is considered that the refrigerator meets the carbon efficiency requirements of level j and is a low-carbon performance product; if the carbon efficiency ratio CER of the refrigerator is greater than the carbon efficiency rating index value of level j, it is considered that the refrigerator does not meet the carbon efficiency requirements of level j and is not a low-carbon performance product.

4. The evaluation method according to claim 3, characterized in that: Take level j as level 2, and use the carbon efficiency level 2 index value as the low-carbon product evaluation value.

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