Methods, systems, equipment and storage media for calculating the energy efficiency ratio of air conditioning units

Abstract

This invention discloses a method, system, equipment, and storage medium for calculating the energy efficiency ratio of an air conditioning unit applied to rail vehicles. The method includes: dividing the cooling temperature range of the air conditioning unit into multiple temperature intervals and obtaining the ambient temperature and required cooling time for each temperature interval; conducting tests on the air conditioning unit under different test conditions to obtain the cooling capacity and power consumption of the air conditioning unit in full-cooling operation mode and semi-cooling operation mode at different ambient temperatures; calculating the total seasonal cooling load of the air conditioning unit based on the cooling capacity, vehicle cooling load, ambient temperature and required cooling time corresponding to the temperature intervals; calculating the total seasonal power consumption of the air conditioning unit based on the power consumption and ambient temperature and required cooling time corresponding to the temperature intervals; and obtaining the seasonal energy efficiency ratio of the air conditioning unit based on the seasonal cooling load and seasonal power consumption.

Description

Technical Field

[0001] This invention relates to the field of energy efficiency diagnosis technology for air conditioning units, and in particular to a method, system, device and storage medium for calculating the energy efficiency ratio of air conditioning units. Background Technology

[0002] Currently, the rated energy efficiency ratio (EER) is used as the energy efficiency evaluation index for air conditioning units in rail vehicles. However, the operating environment of rail vehicle air conditioning units is complex. Air conditioning units operate under rated conditions for very short periods, spending most of their time under partial load, with frequent compressor start-stop cycles. Therefore, the rated EER cannot accurately reflect the energy efficiency level of the air conditioning unit. The seasonal energy efficiency ratio (ESR) is one of the best methods for evaluating the overall energy-saving effect of air conditioning systems. It considers not only steady-state efficiency but also changing environmental conditions and start-stop losses, making it a more reasonable method. Currently, there is no clear testing method for rail air conditioning systems. While testing methods from civil air conditioning standards are used, the operational conditions of rail vehicles are complex, involving cross-regional operation and varied environmental conditions. The seasonal EER testing methods for civil air conditioning are not applicable to rail vehicle air conditioning in terms of test temperature points, meteorological parameter regional divisions, and air conditioning usage. Therefore, there is an urgent need to develop testing and calculation methods to fill the gaps in related research and promote the development of the rail vehicle air conditioning industry towards greater energy efficiency and effectiveness. Summary of the Invention

[0003] This invention addresses the technical problem that existing air conditioner energy efficiency calculation methods are not applicable to air conditioners in rail vehicles, and proposes a method, system, equipment, and storage medium for calculating the energy efficiency ratio of air conditioning units.

[0004] In a first aspect, embodiments of this application provide a method for calculating the energy efficiency ratio of an air conditioning unit applied to rail vehicles, including:

[0005] Temperature range division steps: Divide the cooling temperature range of the air conditioning unit into multiple temperature ranges, and obtain the ambient temperature and required cooling time for each temperature range.

[0006] Test procedure: By testing the air conditioning unit under different test conditions, the cooling capacity and power consumption of the air conditioning unit in full cooling mode and semi-cooling mode at different ambient temperatures are obtained;

[0007] Total load calculation steps: Calculate the total seasonal load of the air conditioning unit based on the cooling capacity, vehicle cooling load, ambient temperature corresponding to the temperature range, and required cooling time.

[0008] Total power consumption calculation steps: Calculate the total power consumption of the air conditioning unit during the cooling season based on the power consumption, the ambient temperature corresponding to the temperature range, and the required cooling time;

[0009] Steps for obtaining the energy efficiency ratio: The cooling season energy efficiency ratio of the air conditioning unit is obtained based on the total load and total power consumption during the cooling season.

[0010] The above energy efficiency ratio calculation method, wherein the air conditioning unit is a fixed-frequency air conditioning unit;

[0011] When the ambient temperature is less than the ambient temperature t at which the vehicle's cooling load and the air conditioning unit's cooling capacity in semi-cooling operation mode reach equilibrium. cb At that time, the air conditioning unit operated intermittently in a semi-cooling mode;

[0012] The ambient temperature t when the vehicle's cooling load and the air conditioning unit's cooling capacity in semi-cooling operation mode reach equilibrium. cb <Ambient temperature< The ambient temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity reach equilibrium in full-cooling operation mode. cd At that time, the air conditioning unit operates intermittently in full cooling mode;

[0013] When the ambient temperature is greater than the vehicle's cooling load and the air conditioning unit's cooling capacity in full-cooling mode, the ambient temperature t reaches equilibrium. cd At that time, the air conditioning unit operates continuously in full cooling mode.

[0014] The above energy efficiency ratio calculation method, wherein the total load calculation step includes:

[0015] When the air conditioning unit is a fixed-frequency air conditioning unit, the total seasonal load (CSTL) is calculated using the following formula:

[0016]

[0017] Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc The required cooling time for the corresponding temperature range; BL c (t jc ) represents the ambient temperature as t jc Vehicle cooling load at that time; φ c (t jc ) represents the ambient temperature as t jc The cooling capacity of the air conditioning unit in full cooling mode at that time; m is the ambient temperature t. jc The ambient temperature t is equal to the temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity reach equilibrium in full-cooling operation mode. cd The temperature range at that time.

[0018] The above energy efficiency ratio calculation method, wherein the total power consumption calculation step includes:

[0019] When the air conditioning unit is a fixed-frequency air conditioning unit, the total power consumption (CSTE) during the cooling season is calculated using the following formula:

[0020]

[0021] Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc P represents the required cooling time for the corresponding temperature range. cm1 (t jc ) represents the ambient temperature as t jc Power consumption of the air conditioning unit in semi-cooling operation mode; P c1 (t jc ) represents the ambient temperature as t jc The power consumption of the air conditioning unit in full cooling mode; t cb The ambient temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity in semi-cooled operation mode reach equilibrium.

[0022] The above energy efficiency ratio calculation method, wherein the air conditioning unit is an inverter air conditioning unit;

[0023] When the ambient temperature is less than or equal to the ambient temperature t at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in semi-cooling operation mode reach equilibrium. ce At that time, the air conditioning unit operates intermittently at minimum cooling capacity in a semi-cooling mode;

[0024] The ambient temperature t when the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in semi-cooled operation mode reach equilibrium. ce <Ambient temperature ≤ Ambient temperature t when the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in full cooling mode reach equilibrium cb At that time, the air conditioning unit operates continuously at a capacity between the minimum cooling capacity in semi-cooling mode and the minimum cooling capacity in full-cooling mode;

[0025] The ambient temperature t when the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cb <Ambient temperature ≤ Ambient temperature t when the vehicle's cooling load and the intermediate cooling capacity of the air conditioning unit in full cooling mode reach equilibrium cf At this time, the air conditioning unit operates continuously at a capacity between the minimum cooling capacity in full cooling mode and the intermediate cooling capacity in full cooling mode;

[0026] The ambient temperature t when the vehicle's cooling load and the air conditioning unit's intermediate cooling capacity in full-cooling operation mode reach equilibrium. cf<Ambient temperature ≤ Ambient temperature t when the vehicle's cooling load and the nominal cooling capacity of the air conditioning unit reach equilibrium in full cooling mode cd At this time, the air conditioning unit operates continuously at a capacity between the intermediate cooling capacity in full cooling mode and the nominal cooling capacity in full cooling mode;

[0027] When the ambient temperature is greater than the ambient temperature t at which the vehicle's cooling load and the nominal cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cd At that time, the air conditioning unit operates continuously at its nominal cooling capacity in full cooling mode.

[0028] The above energy efficiency ratio calculation method, wherein the total load calculation step includes:

[0029] When the air conditioning unit is a variable frequency air conditioning unit, the total seasonal load (CSTL) for the cooling season is calculated using the following formula:

[0030]

[0031] Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc The required cooling time for the corresponding temperature range; BL c (t jc ) represents the ambient temperature as t jc The vehicle's cooling load at that time, m is the ambient temperature t at which the vehicle's cooling load and the intermediate cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cf And ≤t cf Temperature range; φ cr2 (t jc ) represents the ambient temperature as t jc The nominal cooling capacity of the air conditioning unit in full cooling mode.

[0032] The above energy efficiency ratio calculation method, wherein the total power consumption calculation step includes:

[0033] When the air conditioning unit is a variable frequency air conditioning unit, the total power consumption (CSTE) for the cooling season is calculated using the following formula:

[0034]

[0035] Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc This represents the required cooling time for the corresponding temperature range.

[0036] P m (t jc () is the air conditioning unit operating at an ambient temperature of t jcThe power consumption when operating intermittently at minimum cooling capacity in semi-cooling mode;

[0037] P min1 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption during continuous operation between the minimum cooling capacity in semi-cooling mode and the minimum cooling capacity in full-cooling mode;

[0038] P cm1 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption during continuous operation between the minimum cooling capacity in full-cooling mode and the intermediate cooling capacity in full-cooling mode;

[0039] P cm2 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption during continuous operation between the intermediate cooling capacity and the nominal cooling capacity in full cooling mode;

[0040] P c2 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption when the nominal cooling capacity is continuously operating in full cooling mode;

[0041] n is the ambient temperature at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in semi-cooled operation mode reach equilibrium. ce And ≤t ce Temperature range;

[0042] k is the ambient temperature at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cb And ≤t cb Temperature range;

[0043] m is the ambient temperature t at which the vehicle's cooling load and the air conditioning unit's intermediate cooling capacity in full-cooling operation mode reach equilibrium. cf And ≤t cf Temperature range;

[0044] g is the ambient temperature t at which the vehicle's cooling load and the nominal cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cd And ≤t cd The temperature range.

[0045] Secondly, embodiments of this application provide an energy efficiency ratio calculation system for air conditioning units used in rail vehicles, for implementing the energy efficiency ratio calculation method described in the first aspect above, the system comprising:

[0046] Temperature range division unit: Divide the cooling temperature range of the air conditioning unit into multiple temperature ranges and obtain the ambient temperature and required cooling time for each temperature range;

[0047] Test unit: By testing the air conditioning unit under different test conditions, the cooling capacity and power consumption of the air conditioning unit in full cooling mode and semi-cooling mode at different ambient temperatures are obtained;

[0048] Total load calculation unit: Calculates the total seasonal load of the air conditioning unit based on the cooling capacity, vehicle cooling load, ambient temperature corresponding to the temperature range, and required cooling time;

[0049] Total power consumption calculation unit: Calculates the total power consumption of the air conditioning unit during the cooling season based on the power consumption, the ambient temperature corresponding to the temperature range, and the required cooling time;

[0050] Energy efficiency ratio acquisition unit: The cooling season energy efficiency ratio of the air conditioning unit is obtained based on the total load and total power consumption during the cooling season.

[0051] Thirdly, embodiments of this application provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the energy efficiency ratio calculation method for an air conditioning unit as described in the first aspect above.

[0052] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the energy efficiency ratio calculation method for air conditioning units as described in the first aspect above.

[0053] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0054] This application, taking into account the characteristics of rail vehicle air conditioning units, innovatively adds a semi-cold operation mode, which is more in line with the actual operating characteristics of rail vehicle air conditioning units and can more realistically reflect the energy efficiency level of rail vehicle air conditioning units. It fills a gap in related fields, thus providing a reference for the formulation of energy efficiency evaluation indicators for rail vehicle air conditioning units, and also providing theoretical support and guidance for the formulation of relevant standards. Attached Figure Description

[0055] Figure 1 A schematic diagram illustrating the steps of a method for calculating the energy efficiency ratio of an air conditioning unit applied to rail vehicles, provided by the present invention;

[0056] Figure 2 This is a schematic diagram of the seasonal energy efficiency ratio of a fixed-frequency air conditioning unit provided by the present invention;

[0057] Figure 3 This is a schematic diagram of the seasonal energy efficiency ratio of the variable frequency air conditioning unit provided by the present invention;

[0058] Figure 4 A structural framework diagram of an energy efficiency ratio calculation system for an air conditioning unit applied to rail vehicles, provided by the present invention;

[0059] Figure 5 A framework diagram of a computer device provided by the present invention;

[0060] The attached figures are labeled as follows:

[0061] 11. Temperature range division unit; 12. Test unit; 13. Total load calculation unit; 14. Total power consumption calculation unit; 15. Energy efficiency ratio acquisition unit; 81. Processor; 82. Memory; 83. Communication interface; 80. Bus. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0063] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0064] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0065] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0066] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent changes or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0067] Example 1:

[0068] Figure 1 A schematic diagram illustrating the steps of a method for calculating the energy efficiency ratio of an air conditioning unit applied to rail vehicles, provided by this invention, is shown below. Figure 1 As shown in the figure, this embodiment discloses a specific implementation method for calculating the energy efficiency ratio of air conditioning units applied to rail vehicles (hereinafter referred to as the "method"):

[0069] Step S1: Divide the cooling temperature range of the air conditioning unit into multiple temperature zones, and obtain the ambient temperature and required cooling time for each temperature zone.

[0070] In this embodiment, based on thermal calculation conventions and domestic and international standards, the cooling temperature range of the air conditioning unit can be tentatively set to 19°C to 40°C, with each 1°C interval divided into 22 temperature ranges.

[0071] Step S2: By testing the air conditioning unit under different test conditions, the cooling capacity and power consumption of the air conditioning unit in full cooling mode and semi-cooling mode at different ambient temperatures are obtained;

[0072] The test conditions include, but are not limited to: rated cooling condition, low temperature cooling condition, low humidity cooling condition and intermittent cooling condition.

[0073] Step S3: Calculate the total seasonal cooling load of the air conditioning unit based on the cooling capacity, vehicle cooling load, ambient temperature corresponding to the temperature range, and required cooling time.

[0074] Specifically, test data under different operating conditions are obtained by conducting tests under test conditions (rated cooling condition, low temperature cooling condition, etc.). Based on the determined cooling load temperature point, zero load temperature point and rated cooling load of the air conditioning unit, and according to domestic and international standards, the cooling load and power consumption of the air conditioning unit are linearly related to the outside temperature of the vehicle. An energy efficiency ratio diagram is drawn to provide experimental data for subsequent calculations.

[0075] By using the cooling capacity line of the air conditioning unit in the energy efficiency ratio diagram, the cooling capacity of the air conditioning unit, the vehicle cooling load, and the temperature range and required cooling time corresponding to the ambient temperature under different ambient temperatures can be obtained, and then the total seasonal cooling load of the air conditioning unit can be calculated.

[0076] Step S4: Calculate the total power consumption of the air conditioning unit during the cooling season based on the power consumption, the ambient temperature corresponding to the temperature range, and the required cooling time.

[0077] Specifically, by using the power consumption line of the air conditioning unit in the energy efficiency ratio diagram, the power consumption of the air conditioning unit under different ambient temperatures, as well as the temperature range and required cooling time corresponding to the ambient temperature, are obtained, and then the total power consumption of the air conditioning unit during the cooling season is calculated.

[0078] Step S5: Obtain the cooling season energy efficiency ratio of the air conditioning unit based on the total load and total power consumption during the cooling season.

[0079] Specifically, the ratio of the total load of an air conditioning unit during the cooling season to the total power consumption during the cooling season is the cooling season energy efficiency ratio of the air conditioning unit.

[0080] The following detailed description, in conjunction with specific embodiments, further illustrates the energy efficiency ratio calculation method for air conditioning units applied to rail vehicles proposed in this invention.

[0081] When testing the seasonal energy efficiency ratio of air conditioning units, it is necessary to obtain the cooling load of the rail vehicle, the actual cooling capacity of the air conditioning unit, the power consumption of the air conditioning unit, and the operating time of the air conditioning unit under different outdoor dry-bulb and wet-bulb temperatures (the outdoor dry-bulb temperature during the cooling season is divided into several temperature zones, and then the operating time of the air conditioning unit in each temperature zone is calculated). This method is applicable to both fixed-frequency and variable-frequency air conditioning units in rail vehicles. The implementation of this method mainly consists of the following four steps:

[0082] I. Dividing Temperature Ranges

[0083] Since the rail vehicles operate across regions, Wuhan is selected as a typical city for summer operation, based on conventional thermal calculation methods. Considering the actual daily operating time of the rail vehicles is 18 hours, the operating period is tentatively set from 6:00 AM to 12:00 AM daily. The summer air conditioning units in Wuhan are used from March 30th to November 2nd, with a cooling temperature range of 22°C to 40°C. Therefore, the summer cooling temperature range for the rail vehicle air conditioning units is tentatively set at 19°C to 40°C.

[0084] Referring to domestic and international standards, the cooling season of rail vehicle air conditioning units is divided into 22 temperature zones, with each zone ranging from 19℃ to 40℃, as shown in Table 1.

[0085] Table 1. Timing of Temperatures Required for Cooling in Wuhan During the Cooling Season (March 30th to November 2nd)

[0086]

[0087]

[0088] Statistics show that the total cooling time in Wuhan was 3216 hours, and the weighted average outside temperature was 27℃.

[0089] II. Determine the cooling load

[0090] In my country's existing standard system, the rated cooling condition uses a uniform outdoor dry-bulb temperature of 35℃. Therefore, 35℃ is also selected as the cooling load temperature point in the calculation of the seasonal energy efficiency ratio of rail air conditioning units. Based on the actual operation of rail air conditioning, 19℃ is selected as the zero-load point. Referring to domestic and international standards, it is assumed that the cooling load of rail vehicle air conditioning units has a linear relationship with the outside temperature. Therefore, once the rated cooling capacity at 35℃ is determined, the cooling load of the air conditioning unit at various temperatures can be obtained.

[0091] III. Determining the Test Conditions

[0092] Considering the current cooling capacity of air conditioning units in the passenger compartments of rail vehicles, and to ensure the accuracy of the test, a three-point method was adopted for the variable frequency air conditioning units, conducting tests at rated frequency, intermediate frequency, and minimum frequency.

[0093] Based on meteorological parameters for the Wuhan area, the overall outside temperature during summer cooling is divided into five intervals: 19℃~21℃, 22℃~25℃, 26℃~29℃, 30℃~33℃, and 34℃~40℃. The required cooling time for each interval is calculated to be 551h, 783h, 1021h, 629h, and 232h. Weighted averages are then used to calculate the temperatures for these five intervals as 20.0℃, 23.5℃, 27.5℃, 31.3℃, and 35.2℃, respectively.

[0094] Considering that the rated cooling condition of TB / T1804-2017 has an outdoor temperature of 35℃ and the design temperature of air conditioning units for railways and high-speed trains is also 35℃, the rated cooling condition is set as follows: outdoor dry-bulb temperature 35℃, indoor dry-bulb temperature 29℃, and indoor wet-bulb temperature 23℃. As shown in Table 2.

[0095] Referring to domestic and international standards for low-temperature operating conditions, and considering the weighted average temperature in Wuhan, and taking into account that the cooling time accounts for a large proportion (31.7%) of the temperature range with an outside temperature of 27.5℃, which better reflects the actual operating performance of the air conditioning unit, an outside temperature of 27.5℃ is selected as the low-temperature operating condition. When the outside temperature is 27.5℃, according to the in-vehicle temperature adjustment curve in GB / T33193.1-2016, the in-vehicle temperature setting is 23.5℃, and the mixed air temperature is set at a dry-bulb temperature of 25℃ and a wet-bulb temperature of 20.4℃.

[0096] Under low humidity cooling conditions, the outdoor temperature is 27.5℃, and the indoor operating conditions are set at a dry bulb temperature of 25℃ and a wet bulb temperature of <16℃. The intermittent cooling operation time is 6 minutes for fixed-capacity air conditioners and 24 minutes for non-fixed-capacity air conditioners, and 12 minutes for non-fixed-capacity air conditioners at minimum capacity and 48 minutes for non-fixed-capacity air conditioners.

[0097] Table 2 Seasonal Energy Efficiency Ratio Test Conditions for Air Conditioning of Rail Vehicles

[0098]

[0099] Based on the characteristics of rail vehicle operation, this embodiment divides the temperature range using Wuhan as a representative city, selects the zero-load point and the load point of cooling, determines the cooling load line, and establishes a feasible general test condition for the laboratory, filling the gap in the test method for the cooling seasonal energy efficiency ratio in the field of rail vehicle air conditioning.

[0100] IV. Formulating Calculation Methods

[0101] Compared to room air conditioners, rail vehicle air conditioning units generally use a dual-compressor system. When the cooling capacity of a fixed-frequency air conditioning unit exceeds the vehicle load, it will operate in a semi-cooling mode, which means that a single compressor is running. When the cooling capacity of the compressor at its lowest frequency exceeds the vehicle load, the variable-frequency air conditioning unit will operate in a semi-cooling mode. Therefore, the rail vehicle air conditioning unit of this method will have a semi-cooling operation condition added during the test.

[0102] Through the test conditions described in Part III (rated cooling condition, low-temperature cooling condition, etc.), test data under different conditions can be obtained. Furthermore, according to domestic and international standards, the cooling load and power consumption of the air conditioning unit are linearly correlated with the outside temperature. Based on this, a schematic diagram of the seasonal energy efficiency ratio of the air conditioning unit can be drawn, as shown below. Figure 2 , Figure 3 As shown.

[0103] In some embodiments, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the seasonal energy efficiency ratio of a fixed-frequency air conditioning unit. In the diagram, t ca The ambient temperature corresponding to zero load cooling for a vehicle; t cd The ambient temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity reach equilibrium in full-cooling operation mode; t cb The ambient temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity reach equilibrium in semi-cooling operation mode; φ c (t jc ) represents the cooling capacity line for the air conditioning unit in full cooling operation; φ cm (t jc P represents the cooling capacity line for the air conditioning unit during semi-cooling operation; c (t jc P represents the power consumption line for the air conditioning unit during full cooling operation; cm (t jc () represents the power consumption line of the air conditioning unit during semi-cooling operation.

[0104] like Figure 2 As shown, the fixed-frequency air conditioning unit operates in full cooling and partial cooling modes, and the intersection points with the vehicle load line are t and t, respectively. cd and t cb The entire temperature range is divided into three parts:

[0105] When the ambient temperature t jc <t cb At that time, the air conditioning unit operates intermittently in a semi-cooling mode; when t cb <Ambient temperature t jc <t cd At that time, the air conditioning unit operates intermittently in full cooling mode; when the ambient temperature t jc >t cdAt that time, the air conditioning unit operates continuously in full cooling mode.

[0106] according to Figure 2 The following formula is used to calculate the total seasonal load (CSTL) of a fixed-frequency air conditioning unit:

[0107]

[0108] In the above formula, jc represents the temperature range during the cooling season (1, 2, 3, ..., 20, 21, 22); t jc n represents the ambient temperature corresponding to the temperature range. jc For the time (in hours) at which the temperature corresponding to the temperature range jc during the cooling season is required; BL c (t jc The ambient temperature (or outside temperature of the vehicle) is t. jc Vehicle cooling load (W) at that time; φ c (t jc ) represents the ambient temperature as t jc The cooling capacity (W) of the air conditioning unit in full cooling mode; m is the ambient temperature t. jc equal to t cd The temperature range at that time.

[0109] according to Figure 2 The total electricity consumption (CSTE) for the cooling season is calculated using the following formula:

[0110]

[0111] Where jc represents the temperature range (1, 2, 3, ..., 20, 21, 22); t jc n represents the ambient temperature corresponding to the temperature range. jc P represents the required cooling time for the corresponding temperature range. cm1 (t jc ) represents the ambient temperature as t jc Power consumption of the air conditioning unit in semi-cooling operation mode; P c1 (t jc ) represents the ambient temperature as t jc The power consumption of the air conditioning unit in full cooling mode; t cb The ambient temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity reach equilibrium in semi-cooling operation mode. That is, P. cm1 (t jc )·n jc For ambient temperature t jc The power consumption (Wh) of the air conditioning unit in semi-cooling operation mode; P c1 (t jc )·n jc For ambient temperature t jcThe power consumption (Wh) of the air conditioning unit in full cooling operation mode.

[0112] Therefore, based on the total power consumption (CSTE) and total load (CSTL) of a fixed-frequency air conditioning unit during the cooling season, the energy efficiency ratio (SEER) of the fixed-frequency air conditioning unit during the cooling season can be obtained from the following formula:

[0113]

[0114] In some embodiments, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the seasonal energy efficiency ratio of a variable frequency air conditioning unit. In the diagram, t ca The ambient temperature corresponding to zero cooling load of the vehicle; t cd The ambient temperature at which the vehicle's cooling load and the nominal cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium; t cf The ambient temperature at which the vehicle's cooling load and the intermediate cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium; t cb The ambient temperature at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium; t ce The ambient temperature at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in semi-cooled operation mode reach equilibrium; φ cr2 (t jc ) represents the nominal cooling capacity line for the air conditioning unit in full cooling operation; φ crm (t jc ) represents the intermediate cooling capacity line for the air conditioning unit during full cooling operation; φ min (t jc ) represents the minimum cooling capacity line for the air conditioning unit in full cooling operation; φ m (t jc P represents the minimum cooling capacity line for semi-cooled operation of the air conditioning unit; c2 (t jc P represents the nominal cooling capacity power consumption line for the air conditioning unit during full cooling operation; cm (t jc P represents the power consumption of the air conditioning unit during full cooling operation; min (t jc P represents the minimum cooling capacity power consumption line for the air conditioning unit in full cooling operation; m (t jc This is the minimum cooling capacity power consumption line for the air conditioning unit in semi-cooled operation.

[0115] like Figure 3This diagram illustrates the relationship between the cooling capacity and power consumption of a variable frequency air conditioning unit and the vehicle's cooling load. It shows the relationships between the nominal cooling capacity during full cooling operation, the intermediate cooling capacity during full cooling operation, the minimum cooling capacity during full cooling operation, and the minimum cooling capacity during half-cooling operation, and the ambient temperature. However, it omits the relationships between the intermediate cooling capacity during half-cooling operation and the nominal cooling capacity during half-cooling operation, as well as the ambient temperature. This is because, in actual operation, the compressor operates at a variable frequency during half-cooling operation, and its half-cooling cooling capacity may overlap with the full cooling capacity, resulting in a complex operating logic that is difficult to encompass all possibilities. Furthermore, this process has a relatively small operating time relative to the entire temperature range and thus a smaller impact on the overall result; therefore, it has been simplified. The entire temperature range is divided into five operating states:

[0116] When the ambient temperature t jc ≤t ce At that time, the air conditioning unit operates intermittently at minimum cooling capacity in a semi-cooling mode;

[0117] When t ce <Ambient temperature t jc ≤t cb At that time, the air conditioning unit operates continuously at a capacity between the minimum cooling capacity in semi-cooling mode and the minimum cooling capacity in full-cooling mode;

[0118] When t cb <Ambient temperature t jc ≤t cf At this time, the air conditioning unit operates continuously at a capacity between the minimum cooling capacity in full cooling mode and the intermediate cooling capacity in full cooling mode;

[0119] When t cf <Ambient temperature t jc ≤t cd At this time, the air conditioning unit operates continuously at a capacity between the intermediate cooling capacity in full cooling mode and the nominal cooling capacity in full cooling mode;

[0120] When the ambient temperature t jc >t cd At that time, the air conditioning unit operates continuously at its nominal cooling capacity in full cooling mode.

[0121] according to Figure 3 The seasonal total load (CSTL) of the variable frequency air conditioning unit is calculated using the following formula:

[0122]

[0123] Where jc represents the temperature range (1, 2, 3, ..., 20, 21, 22); t jc n represents the ambient temperature corresponding to the temperature range. jc The required cooling time for the corresponding temperature range; BLc (t jc ) represents the ambient temperature as t jc The vehicle's cooling load at that time, where m is the ambient temperature closest to t. cf And ≤t cf Temperature range; φ cr2 (t jc ) represents the ambient temperature as t jc The nominal cooling capacity of the air conditioning unit in full cooling mode.

[0124] according to Figure 3 The total seasonal power consumption (CSTE) of the variable frequency air conditioning unit is calculated using the following formula:

[0125]

[0126] Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc This represents the required cooling time for the corresponding temperature range.

[0127] P m (t jc () is the air conditioning unit operating at an ambient temperature of t jc Power consumption (W) when operating intermittently at minimum cooling capacity in semi-cooling mode;

[0128] P min1 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption (W) of continuous operation between the minimum cooling capacity in semi-cooling mode and the minimum cooling capacity in full-cooling mode;

[0129] P cm1 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption (W) of continuous operation between the minimum cooling capacity in full cooling mode and the intermediate cooling capacity in full cooling mode;

[0130] P cm2 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption (W) during continuous operation between the intermediate cooling capacity and the nominal cooling capacity in full cooling mode;

[0131] P c2 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption (W) when the nominal cooling capacity is continuously operated in full cooling mode;

[0132] n represents the ambient temperature closest to t. ce And ≤t ce Temperature range;

[0133] k is the ambient temperature closest to t. cb And ≤t cb Temperature range;

[0134] m is the ambient temperature closest to t. cf And ≤t cf Temperature range;

[0135] g represents the ambient temperature closest to t. cd And ≤t cd The temperature range.

[0136] Therefore, based on the total power consumption (CSTE) and total load (CSTL) of the variable frequency air conditioning unit during the cooling season, the energy efficiency ratio (SEER) of the variable frequency air conditioning unit during the cooling season can be obtained from the following formula:

[0137]

[0138] This embodiment, taking into account the characteristics of air conditioning units in rail vehicles, innovatively adds a semi-cooling operation mode compared to room air conditioners. Fixed-frequency air conditioning units also include a semi-cooling operation mode, while variable-frequency air conditioning units add a minimum capacity semi-cooling operation mode, better reflecting the actual operating characteristics of air conditioning units and improving the accuracy of the test method. In terms of calculation methods, fixed-frequency air conditioning units operate in both full-cooling and semi-cooling modes, with the entire temperature range divided into three parts: intermittent semi-cooling operation, intermittent full-cooling operation, and continuous full-cooling operation. Variable-frequency air conditioning units are divided into five parts: intermittent operation at minimum semi-cooling capacity, continuous operation between minimum semi-cooling capacity and minimum full-cooling capacity, continuous operation between minimum full-cooling capacity and intermediate full-cooling capacity, continuous operation between intermediate full-cooling capacity and nominal full-cooling capacity, and continuous operation at nominal full-cooling capacity. Compared to room air conditioners, a semi-cooling mode calculation method has been added. Taking into account the running time ratio of each mode of the track air conditioner, the intermediate cooling capacity and nominal cooling capacity of semi-cooling operation have been simplified for easier calculation, reducing the amount of calculation and improving the accuracy of the calculation.

[0139] Currently, there is no clearly defined test method for the seasonal energy efficiency ratio (ESR) of rail vehicle air conditioning systems. This method, referencing relevant domestic and international standards, constructs a test condition suitable for the seasonal EER of rail vehicle air conditioning units. Based on the determined load line characteristics and the division of temperature ranges, the seasonal EER of rail vehicle air conditioning can be obtained using the algorithm described in this method. This innovative method adds a semi-cooled operation condition, which can more realistically reflect the energy efficiency level of rail vehicle air conditioning units, filling a gap in the field. This provides a reference for the formulation of energy efficiency evaluation indicators for rail vehicle air conditioning units and also provides theoretical support and guidance for the development of relevant standards.

[0140] Example 2:

[0141] Based on the method for calculating the energy efficiency ratio of an air conditioning unit disclosed in Embodiment 1, this embodiment discloses a specific implementation example of an energy efficiency ratio calculation system for an air conditioning unit (hereinafter referred to as the "system").

[0142] Reference Figure 4 As shown, the system includes:

[0143] Temperature range division unit 11: Divides the cooling temperature range of the air conditioning unit into multiple temperature ranges and obtains the ambient temperature and required cooling time for each temperature range.

[0144] Test Unit 12: By testing the air conditioning unit under different test conditions, the cooling capacity and power consumption of the air conditioning unit in full cooling operation mode and semi-cooling operation mode at different ambient temperatures are obtained;

[0145] Total load calculation unit 13: Calculates the total seasonal load of the air conditioning unit based on the cooling capacity, vehicle cooling load, ambient temperature corresponding to the temperature range, and required cooling time;

[0146] Total power consumption calculation unit 14: Calculates the total power consumption of the air conditioning unit during the cooling season based on the power consumption, the ambient temperature corresponding to the temperature range, and the required cooling time;

[0147] Energy efficiency ratio obtaining unit 15: Obtains the cooling season energy efficiency ratio of the air conditioning unit based on the total load of the cooling season and the total power consumption of the cooling season.

[0148] Example 3:

[0149] Combination Figure 5 As shown, this embodiment discloses a specific implementation of a computer device. The computer device may include a processor 81 and a memory 82 storing computer program instructions.

[0150] Specifically, the processor 81 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0151] The memory 82 may include a mass storage device for data or instructions. For example, and not limitingly, the memory 82 may include a hard disk drive (HDD), a floppy disk drive, a solid-state drive (SSD), flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 82 may include removable or non-removable (or fixed) media. Where appropriate, the memory 82 may be internal or external to a data processing device. In a particular embodiment, the memory 82 is non-volatile memory. In a particular embodiment, the memory 82 includes read-only memory (ROM) and random access memory (RAM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), an electrically alterable read-only memory (EAROM), or flash memory, or a combination of two or more of these. Where appropriate, the RAM can be Static Random-Access Memory (SRAM) or Dynamic Random-Access Memory (DRAM). DRAM can be Fast Page Mode Dynamic Random-Access Memory (FPMDRAM), Extended Data Out Dynamic Random-Access Memory (EDODRAM), Synchronous Dynamic Random-Access Memory (SDRAM), etc.

[0152] The memory 82 can be used to store or cache various data files that need to be processed and / or communicated, as well as possible computer program instructions executed by the processor 81.

[0153] The processor 81 reads and executes the computer program instructions stored in the memory 82 to implement any of the energy efficiency ratio calculation methods for air conditioning units in the above embodiments.

[0154] In some embodiments, the computer device may further include a communication interface 83 and a bus 80. For example, Figure 5 As shown, the processor 81, memory 82, and communication interface 83 are connected through bus 80 and complete communication with each other.

[0155] The communication interface 83 is used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. The communication port 83 can also enable data communication with other components such as external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0156] Bus 80 includes hardware, software, or both, that couples components of a computer device together. Bus 80 includes, but is not limited to, at least one of the following: data bus, address bus, control bus, expansion bus, and local bus. For example, and not as a limitation, bus 80 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, bus 80 may include one or more buses. Although specific buses are described and illustrated in the embodiments of this application, this application considers any suitable bus or interconnection.

[0157] Furthermore, in conjunction with the energy efficiency ratio calculation method for air conditioning units in the above embodiments, this application embodiment can provide a computer-readable storage medium for implementation. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the energy efficiency ratio calculation methods for air conditioning units in the above embodiments.

[0158] In summary, the beneficial effects of the present invention are as follows:

[0159] 1. Based on the characteristics of rail vehicle operation, temperature ranges were divided using Wuhan as a representative city, cooling zero-load points and cooling load points were selected, cooling load lines were determined, and feasible general test conditions were established in the laboratory, filling the gap in the test method for cooling seasonal energy efficiency ratio in the field of rail vehicle air conditioning.

[0160] 2. Considering the characteristics of air conditioning units for rail vehicles, a semi-cooling operation mode was innovatively added compared to room air conditioners. A semi-cooling operation mode was added for fixed-frequency air conditioning units, and a minimum capacity semi-cooling operation mode was added for variable-frequency air conditioning units. This is more in line with the actual operating characteristics of air conditioning units and improves the accuracy of the test method.

[0161] 3. Regarding the calculation method, fixed-frequency air conditioning units operate in both full-cooling and semi-cooling modes, with the entire temperature range divided into three parts: intermittent semi-cooling operation, intermittent full-cooling operation, and continuous full-cooling operation. Variable-frequency air conditioning units are divided into five parts: intermittent operation at minimum semi-cooling capacity, continuous operation between minimum semi-cooling capacity and minimum full-cooling capacity, continuous operation between minimum full-cooling capacity and intermediate full-cooling capacity, continuous operation between intermediate full-cooling capacity and nominal full-cooling capacity, and continuous operation at nominal full-cooling capacity. Compared to room air conditioners, a calculation method for the semi-cooling mode has been added. Considering the operating time proportions of each mode in track air conditioning, the intermediate and nominal half-cooling capacity parameters have been simplified for easier calculation, reducing the computational load and improving accuracy.

[0162] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0163] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for calculating the energy efficiency ratio of an air conditioning unit, characterized in that, Applied to rail vehicles, including: Temperature range division steps: Divide the cooling temperature range of the air conditioning unit into multiple temperature ranges, and obtain the ambient temperature and required cooling time for each temperature range. Test procedure: By testing the air conditioning unit under different test conditions, the cooling capacity and power consumption of the air conditioning unit in full cooling mode and semi-cooling mode at different ambient temperatures are obtained; Total load calculation steps: Calculate the total seasonal load of the air conditioning unit based on the cooling capacity, vehicle cooling load, ambient temperature corresponding to the temperature range, and required cooling time. Total power consumption calculation steps: Calculate the total power consumption of the air conditioning unit during the cooling season based on the power consumption, the ambient temperature corresponding to the temperature range, and the required cooling time; Steps for obtaining the energy efficiency ratio: Obtain the cooling season energy efficiency ratio of the air conditioning unit based on the total load and total power consumption during the cooling season; If the air conditioning unit is a fixed-frequency air conditioning unit; When the ambient temperature is less than the ambient temperature t at which the vehicle's cooling load and the air conditioning unit's cooling capacity in semi-cooling operation mode reach equilibrium. cb At that time, the air conditioning unit operated intermittently in a semi-cooling mode; The ambient temperature t when the vehicle's cooling load and the air conditioning unit's cooling capacity in semi-cooling operation mode reach equilibrium. cb <Ambient temperature< The ambient temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity reach equilibrium in full-cooling operation mode. cd At that time, the air conditioning unit operates intermittently in full cooling mode; When the ambient temperature is greater than the vehicle's cooling load and the air conditioning unit's cooling capacity in full-cooling mode, the ambient temperature t reaches equilibrium. cd At that time, the air conditioning unit operates continuously in full cooling mode.

2. The energy efficiency ratio calculation method according to claim 1, characterized in that, The total load calculation steps include: When the air conditioning unit is a fixed-frequency air conditioning unit, the total seasonal load (CSTL) is calculated using the following formula: Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc The required cooling time for the corresponding temperature range; BL c (t jc ) represents the ambient temperature as t jc Vehicle cooling load at that time; φ c (t jc ) represents the ambient temperature as t jc The cooling capacity of the air conditioning unit in full cooling mode at that time; m is the ambient temperature t. jc The ambient temperature t is equal to the temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity reach equilibrium in full-cooling operation mode. cd The temperature range at that time.

3. The energy efficiency ratio calculation method according to claim 2, characterized in that, The steps for calculating the total power consumption include: When the air conditioning unit is a fixed-frequency air conditioning unit, the total power consumption (CSTE) during the cooling season is calculated using the following formula: Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc P represents the required cooling time for the corresponding temperature range. cm1 (t jc ) represents the ambient temperature as t jc Power consumption of the air conditioning unit in semi-cooling operation mode; P c1 (t jc ) represents the ambient temperature as t jc The power consumption of the air conditioning unit in full cooling mode; t cb The ambient temperature at which the vehicle's cooling load and the air conditioning unit's cooling capacity in semi-cooled operation mode reach equilibrium.

4. The energy efficiency ratio calculation method according to claim 1, characterized in that, If the air conditioning unit is a variable frequency air conditioning unit; When the ambient temperature is less than or equal to the ambient temperature t at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in semi-cooling operation mode reach equilibrium. ce At that time, the air conditioning unit operates intermittently at minimum cooling capacity in a semi-cooling mode; The ambient temperature t when the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in semi-cooled operation mode reach equilibrium. ce <Ambient temperature ≤ Ambient temperature t when the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in full cooling mode reach equilibrium cb At that time, the air conditioning unit operates continuously at a capacity between the minimum cooling capacity in semi-cooling mode and the minimum cooling capacity in full-cooling mode; The ambient temperature t at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cb <Ambient temperature ≤ Ambient temperature t when the vehicle's cooling load and the intermediate cooling capacity of the air conditioning unit in full cooling mode reach equilibrium cf At this time, the air conditioning unit operates continuously at a capacity between the minimum cooling capacity in full cooling mode and the intermediate cooling capacity in full cooling mode; The ambient temperature t when the vehicle's cooling load and the air conditioning unit's intermediate cooling capacity in full-cooling operation mode reach equilibrium. cf <Ambient temperature ≤ Ambient temperature t when the vehicle's cooling load and the nominal cooling capacity of the air conditioning unit reach equilibrium in full cooling mode cd At this time, the air conditioning unit operates continuously at a capacity between the intermediate cooling capacity in full cooling mode and the nominal cooling capacity in full cooling mode; When the ambient temperature is greater than the ambient temperature t at which the vehicle's cooling load and the nominal cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cd At that time, the air conditioning unit operates continuously at its nominal cooling capacity in full cooling mode.

5. The energy efficiency ratio calculation method according to claim 4, characterized in that, The total load calculation steps include: When the air conditioning unit is a variable frequency air conditioning unit, the total seasonal load (CSTL) for the cooling season is calculated using the following formula: Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc The required cooling time for the corresponding temperature range; BL c (t jc ) represents the ambient temperature as t jc The vehicle's cooling load at that time, m is the ambient temperature t at which the vehicle's cooling load and the intermediate cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cf And ≤t cf Temperature range; φ cr2 (t jc ) represents the ambient temperature as t jc The nominal cooling capacity of the air conditioning unit in full cooling mode.

6. The energy efficiency ratio calculation method according to claim 5, characterized in that, The steps for calculating the total power consumption include: When the air conditioning unit is a variable frequency air conditioning unit, the total power consumption (CSTE) for the cooling season is calculated using the following formula: Where jc represents the temperature range; t jc n represents the ambient temperature corresponding to the temperature range. jc This represents the required cooling time for the corresponding temperature range. P m (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption when operating intermittently at minimum cooling capacity in semi-cooling mode; P min1 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption during continuous operation between the minimum cooling capacity in semi-cooling mode and the minimum cooling capacity in full-cooling mode; P cm1 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption during continuous operation between the minimum cooling capacity in full-cooling mode and the intermediate cooling capacity in full-cooling mode; P cm2 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption during continuous operation between the intermediate cooling capacity and the nominal cooling capacity in full cooling mode; P c2 (t jc () is the air conditioning unit operating at an ambient temperature of t jc The power consumption when the nominal cooling capacity is continuously operating in full cooling mode; n is the ambient temperature at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in semi-cooled operation mode reach equilibrium. ce And ≤t ce Temperature range; k is the ambient temperature at which the vehicle's cooling load and the minimum cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cb And ≤t cb Temperature range; m is the ambient temperature t at which the vehicle's cooling load and the air conditioning unit's intermediate cooling capacity in full-cooling operation mode reach equilibrium. cf And ≤t cf Temperature range; g is the ambient temperature t at which the vehicle's cooling load and the nominal cooling capacity of the air conditioning unit in full-cooling operation mode reach equilibrium. cd And ≤t cd The temperature range.

7. A system for calculating the energy efficiency ratio of an air conditioning unit, characterized in that, The system for implementing the energy efficiency ratio calculation method of the air conditioning unit according to any one of claims 1-6, the system comprising: Temperature range division unit: Divide the cooling temperature range of the air conditioning unit into multiple temperature ranges and obtain the ambient temperature and required cooling time for each temperature range; Test unit: By testing the air conditioning unit under different test conditions, the cooling capacity and power consumption of the air conditioning unit in full cooling mode and semi-cooling mode at different ambient temperatures are obtained; Total load calculation unit: Calculates the total seasonal load of the air conditioning unit based on the cooling capacity, vehicle cooling load, ambient temperature corresponding to the temperature range, and required cooling time; Total power consumption calculation unit: Calculates the total power consumption of the air conditioning unit during the cooling season based on the power consumption, the ambient temperature corresponding to the temperature range, and the required cooling time; Energy efficiency ratio acquisition unit: The cooling season energy efficiency ratio of the air conditioning unit is obtained based on the total load and total power consumption during the cooling season.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method for calculating the energy efficiency ratio of the air conditioning unit as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method for calculating the energy efficiency ratio of the air conditioning unit as described in any one of claims 1 to 6.

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