A method for testing and evaluating performance of a summer automatic air conditioner of a passenger vehicle in a non-automatic mode

Abstract

A kind of passenger car summer automatic air conditioner non-automatic mode air conditioner performance test method and evaluation method, sensor is arranged in environmental simulation laboratory and the position of the blowing face outlet of the vehicle to be tested and the head of the vehicle cabin to be tested;The vehicle to be tested carries out road load setting;Ensure that the temperature in the vehicle to be tested is the same as the temperature in the environmental simulation laboratory, when the average temperature of the head of the vehicle cabin to be tested reaches the specified temperature, open the sunlight simulation system to set the sunshine to start the car and cover the car for a period of time;The vehicle to be tested keeps uniform speed, set air conditioner to middle gear to cool the vehicle cabin, after setting air conditioner to low gear, carry out low noise test, idle for a period of time, when the temperature in the vehicle to be tested is stable at the temperature set by air conditioner, set air conditioner to low gear again, idle for a period of time, to complete the non-automatic mode air conditioner performance test of the vehicle to be tested summer automatic air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic air conditioning in vehicles, in particular to a non-automatic mode air conditioning performance test method and evaluation method for automatic air conditioning of passenger cars in summer. BACKGROUND

[0002] With the rapid development of science and technology, automatic air conditioning of vehicles has gradually become a standard configuration, and the overall performance and details of automatic air conditioning have been improved in all aspects. People's requirements for the performance of vehicle air conditioning systems are also getting higher and higher. Some consumers also require good air conditioning performance when using the non-automatic mode of automatic air conditioning.

[0003] Automobile air conditioning system: composed of one or more components of heating device, refrigeration device, ventilation device, air purification device and humidification device, and necessary control components, etc., used for adjusting the temperature, humidity and cleanliness of the air in the driver's cabin, and making it flow and distribute in the driver's cabin at a certain speed, so as to provide a comfortable environment and fresh air for the driver and passengers.

[0004] Automatic air conditioning: an air conditioning system that automatically adjusts the temperature, air volume, air mode and air mode of the air outlet through the electronic control system of the air conditioner.

[0005] Manual air conditioning: an air conditioning system in which the user can manually adjust the temperature, air volume, air mode and air mode of the air outlet.

[0006] Although there are various maximum performance test methods for automobile air conditioning on the market at present, there is a lack of air conditioning performance and comfort test methods for the daily use habits of users in the non-automatic mode.

[0007] In the prior art, patent document CN112033703A discloses "a car passenger compartment air conditioner comfort test method", which applies dynamic driving condition curves with typical Chinese regions and cities, time and season, and integrates the car passenger compartment with the external environment, making the test environment of the car more realistic. The human-shaped car air conditioner comfort measurement instrument (air conditioner dummy) with sensors installed on each body part is used to simulate the thermal comfort of the driver and passenger in the passenger compartment. The sensor can continuously record various transient data during the entire driving process, and the data is more realistic, improving the reliability of the post-processing evaluation, and filling the gap in the test of car air conditioner comfort. Patent document CN112393919A discloses "air conditioner refrigeration performance test method", which confirms that the car state meets the test requirements, and then installs temperature sensors and air pressure sensors at each preset test point of the car to obtain the temperature and air pressure at different test positions. Then, the car is preheated and warmed up twice to simulate the normal use state of each component of the car, and then the car is adjusted to idle state and fixed temperature to test the air conditioner. It is specially designed to test the special use condition of long-time idling (≥2h) in high-temperature environment in high-end business and government vehicles.

[0008] In summary, the existing car air conditioner test method lacks a test method for air conditioner performance and comfort under the user's daily non-automatic mode use habit. SUMMARY

[0009] The present application solves the problem of the lack of air conditioner performance and comfort test method for the user's daily non-automatic mode in the existing car air conditioner test method.

[0010] The non-automatic mode air conditioner performance test method for summer automatic air conditioner of passenger car according to the present application comprises the following steps:

[0011] Step S1, the sensors are arranged in the environment simulation laboratory and the blowing face outlet of the vehicle to be tested and the head of the driver's cabin of the vehicle to be tested, respectively;

[0012] Step S2, the road load of the vehicle to be tested is set;

[0013] Step S3, ensure that the temperature in the vehicle to be tested is the same as the temperature in the environment simulation laboratory, when the average temperature of the head of the driver's cabin of the vehicle to be tested reaches the specified temperature, turn on the sunlight simulation system to start sunning the car and cover the car for a period of time;

[0014] Step S4, the vehicle to be tested keeps uniform speed, the air conditioner is set to the middle gear to cool the vehicle interior of the vehicle to be tested, then the air conditioner is adjusted to a lower gear for low noise test, the vehicle is parked and idled for a period of time, when the temperature in the vehicle to be tested is stable at the temperature set by the air conditioner, the air conditioner is adjusted to a lower gear again, the vehicle is parked and idled for a period of time, so as to complete the non-automatic mode air conditioning performance test of the summer automatic air conditioner of the vehicle to be tested.

[0015] Further, in an embodiment of the present application, in step S1, the sensor is arranged at a position 1 m in front of the vehicle in the environmental simulation laboratory.

[0016] The sensor is arranged at a position 25 mm inserted into the center of the end face of the blow face air outlet of the vehicle to be tested.

[0017] The sensor is arranged at a position 700 mm high from the front edge of the upper surface of the seat cushion on the longitudinal center plane of the seat, and 150 mm forward from the front edge of the upper end face of the seat back.

[0018] Further, in an embodiment of the present application, in step S2, the formula for setting the road load is:

[0019] In the formula, F is the road load of the vehicle to be tested, C D Air resistance coefficient, A is the windward area of the vehicle, p is the air density, V is the driving speed of the vehicle, f is the friction resistance coefficient, M is the maximum mass allowed by the whole vehicle, and g is the gravitational acceleration.

[0020] Further, in an embodiment of the present application, in step S3, the method for ensuring that the temperature in the vehicle to be tested is the same as the temperature in the environmental simulation laboratory is:

[0021] All doors and windows of the vehicle to be tested are opened until the temperature in the vehicle to be tested is the same as the temperature in the environmental simulation laboratory.

[0022] Further, in an embodiment of the present application, in step S3, the specified temperature reached by the average temperature of the head is 35℃±1℃.

[0023] Further, in an embodiment of the present application, in step S3, the sunlight simulated by the sunlight simulation system is set to 800W / ㎡.

[0024] Further, in an embodiment of the present application, in step S3, the vehicle is covered for 30 min.

[0025] Further, in one embodiment of the present application, the vehicle to be tested maintains a constant speed of 40km / h in step S4.

[0026] Further, in one embodiment of the present application, the vehicle to be tested maintains a constant speed of 40km / h in step S4.

[0027] The evaluation method for the non-automatic mode air conditioning performance of the automatic air conditioner of a passenger vehicle in summer according to the present application adopts the test method of the above-mentioned method for evaluation, and comprises the following steps:

[0028] Step one: the face outlet temperature, the average head temperature, the average head temperature fluctuation, the average face outlet temperature fluctuation and the subjective evaluation of the vehicle to be tested are taken as evaluation indexes;

[0029] Step two: the weights of the face outlet temperature, the average head temperature, the average head temperature fluctuation, the average face outlet temperature fluctuation and the subjective evaluation of the vehicle to be tested are determined by AHP;

[0030] Step three: the performance of the face outlet temperature, the average head temperature, the average head temperature fluctuation, the average face outlet temperature fluctuation and the subjective evaluation of the vehicle to be tested are evaluated by scoring and weighting.

[0031] The present application solves the problem that the existing automobile air conditioning test method lacks a test method for the air conditioning performance and comfort in the non-automatic mode of the user in daily life. The specific beneficial effects include:

[0032] The test method for the non-automatic mode air conditioning performance of the automatic air conditioner of a passenger vehicle in summer according to the present application simulates and verifies the air conditioning performance and the ride comfort of the user in the non-automatic mode of the automatic air conditioner of the vehicle on a test bench. On the one hand, the test bench equalizes the road and different seasons, saves the research and development cost, reduces the test risk, ensures that the verification can be performed at any time and in any weather, ensures the test period, and on the other hand, provides a clear, competitive and feasible target for product development to meet the demand of the user for the maximum cooling performance and the comfort of the automobile air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments taken with reference to the accompanying drawings, in which:

[0034] Figure 1 is a diagram of the measurement parameters and the installation positions of the sensors described in the detailed description.

[0035] Figure 2 is a diagram of the pre-processing working conditions described in the detailed description.

[0036] Figure 3 is a test condition diagram described in the detailed description.

[0037] Figure 4 is a summer automatic air conditioner non-automatic mode performance test evaluation index system diagram described in the detailed description.

[0038] Figure 5 is a passenger car automatic air conditioner non-automatic mode performance test each evaluation index weight diagram described in the detailed description.

[0039] Figure 6 is an evaluation item scoring standard diagram described in the detailed description. DETAILED DESCRIPTION

[0040] The various embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0041] The non-automatic mode air conditioning performance test method of a summer automatic air conditioner for a passenger car described in the embodiment includes the following steps:

[0042] Step S1, the sensors are arranged at the positions of the environmental simulation laboratory and the blowing face air outlet of the vehicle to be tested and the head of the passenger compartment of the vehicle to be tested, respectively;

[0043] Step S2, the road load of the vehicle to be tested is set;

[0044] Step S3, the temperature in the vehicle to be tested is ensured to be the same as the temperature in the environmental simulation laboratory, when the average temperature at the head of the passenger compartment of the vehicle to be tested reaches the specified temperature, the sunlight simulation system is turned on to set the sun shining and the vehicle is covered for a period of time;

[0045] Step S4, the vehicle to be tested is kept at a uniform speed, the air conditioner is set to the middle gear to cool the vehicle to be tested, then the air conditioner is adjusted to a lower gear for low noise test, the vehicle is stopped for a period of time at idle speed, when the temperature in the vehicle to be tested is stabilized at the temperature set by the air conditioner, the air conditioner is adjusted to a lower gear again, the vehicle is stopped for a period of time at idle speed, thereby completing the non-automatic mode air conditioning performance test of the summer automatic air conditioner for the vehicle to be tested.

[0046] In the embodiment, in step S1, the sensor is arranged at a position 1m in front of the vehicle in the environmental simulation laboratory;

[0047] The sensor is arranged at a position 25mm inserted into the center of the end surface of the blowing face air outlet of the vehicle to be tested;

[0048] The sensor is positioned at the longitudinal center of the seat in the head of the passenger compartment of the vehicle under test, 700mm above the front edge of the upper surface of the seat cushion, and 150mm forward from the front edge of the upper end of the seat back.

[0049] In this embodiment, the formula for setting the road load in step S2 is:

[0050] In the formula, F represents the road load of the vehicle under test, and C D Air drag coefficient, A is the vehicle's frontal area, ρ is the air density, V is the vehicle's speed, f is the friction drag coefficient, M is the maximum allowable mass of the vehicle, and g is the acceleration due to gravity.

[0051] In this embodiment, the method for ensuring that the interior temperature of the vehicle under test is the same as the temperature in the environmental simulation laboratory in step S3 is as follows:

[0052] Open all doors and windows of the vehicle under test until the interior temperature of the vehicle is the same as that in the environmental simulation laboratory.

[0053] In this embodiment, in step S3, the average head temperature reaches a specified temperature of 35℃±1℃.

[0054] In this embodiment, in step S3, the sunlight simulation system is set to 800W / ㎡.

[0055] In this embodiment, in step S3, the time period for which the car is kept warm is 30 minutes.

[0056] In this embodiment, in step S4, the vehicle under test maintains a constant speed of 40 km / h.

[0057] In this embodiment, in step S4, the idling period is 5 minutes.

[0058] This embodiment describes a method for evaluating the performance of a passenger vehicle's automatic air conditioning system in non-automatic mode during summer. The evaluation method employs the testing method described in the above embodiment and includes the following steps:

[0059] Step 1: The air outlet temperature, average head temperature, average head temperature fluctuation, average air outlet temperature fluctuation, and subjective evaluation of the vehicle under test are used as evaluation indicators.

[0060] Step 2: Use AHP to determine the weights of the air outlet temperature, average head temperature, average head temperature fluctuation, average air outlet temperature fluctuation, and subjective evaluation of the vehicle under test.

[0061] Step three, the performance evaluation of the blowing face outlet temperature, the head average temperature, the head average temperature fluctuation, the blowing face outlet average temperature fluctuation and the subjective evaluation of the test vehicle are respectively evaluated in a scoring and weighting manner.

[0062] The embodiment is based on the non-automatic mode air conditioning performance test method of the summer automatic air conditioner of a passenger vehicle according to the application, and specifically provides an actual embodiment:

[0063] Step A. Non-automatic mode performance test of the automatic air conditioner of a passenger vehicle

[0064] (1) Install sensors

[0065] Sensors are arranged at the blowing face outlet and the head of the passenger compartment of the vehicle to be tested, and the specific measurement points and positions are shown in Figure 1

[0066] (2) Perform drum load setting

[0067] The setting of the road load of the vehicle is calculated according to the following formula:

[0068] In the formula, F is the road load of the vehicle, in Newton (N), CD is the air resistance coefficient (dimensionless value), A is the windward area of the vehicle, in square meters (㎡), p is the air density, in kilograms per cubic meter (kg / m 3 ), 1.146 kg / m 3 at 35℃, V is the driving speed of the vehicle, in kilometers per hour (km / h), f is the friction resistance coefficient (dimensionless value), 0.011 at 35℃, M is the maximum mass allowed by the vehicle (if the vehicle can be towed, it is the maximum designed total mass of the train), in kilograms (kg), and g is the acceleration of gravity, in meters per square second (m / s 3 );

[0069] (3) Perform vehicle bench test verification

[0070] Vehicle pretreatment, such as Figure 2 shown, is preheated to a high temperature. The preheating to a high temperature is divided into three stages and is performed continuously. The environmental temperature is set to 35℃, and the relative humidity is 50%. The doors and windows are opened for isothermal treatment, and when the average temperature of the head of the passenger compartment reaches 35℃±1℃, the sunlight simulation system is turned on, set to 800W / ㎡, and the vehicle is exposed to sunlight for 30 minutes. Then all the doors and windows are closed, and the vehicle is covered for 30 minutes.

[0071] As shown in Figure 3 ​The experiment was conducted as shown. The experiment consisted of five consecutive operating conditions. Starting at a vehicle speed of 40 km / h, the air conditioning was set to a medium setting with a high fan speed and ran for 10 minutes to rapidly cool the vehicle interior. Then, simulating user habits, the fan speed was reduced by one level to maintain low noise for 20 minutes, followed by idling for 5 minutes to simulate urban traffic congestion. After the vehicle interior temperature had completely decreased, the fan speed was adjusted to the second lowest setting, and the vehicle was driven at 40 km / h for 20 minutes, followed by idling for 5 minutes, simulating both driving and traffic jam conditions.

[0072] Step B. Subjective evaluation test of comfort in non-automatic mode of passenger vehicle automatic air conditioning

[0073] Repeat the test conditions in step A, and invite air conditioning evaluation professionals to enter the passenger cabin to conduct a subjective evaluation of each seat.

[0074] Step C. Establishment of Evaluation Index System

[0075] (1) Selection of evaluation indicators

[0076] Establishing a scientific and reasonable evaluation index system is the core and fundamental way to determine the performance of automatic air conditioning in non-automatic mode. Based on the summary and analysis of the test results of automatic air conditioning in non-automatic mode, and for the cooling condition, five performance indicators (first-level indicators) and corresponding indicators (second-level indicators) that are easy to quantify and have a significant impact on the selection of the performance evaluation of automatic air conditioning in non-automatic mode of passenger vehicles are selected as evaluation indicators: air outlet temperature, average head temperature, average head temperature fluctuation, average air outlet temperature fluctuation, and subjective evaluation.

[0077] (2) Evaluation index system

[0078] Based on the research on the five major factors affecting the selection of evaporator protection temperature for fixed displacement compressors in passenger vehicles, an evaluation index system for the performance test of passenger vehicle automatic air conditioning in non-automatic mode was constructed using AHP, such as... Figure 4 As shown. By Figure 4 It can be seen that the evaluation system for the performance test of passenger vehicle automatic air conditioning in non-automatic mode includes 5 primary indicators, covering the main aspects affecting the performance of automatic air conditioning in non-automatic mode; 25 secondary indicators decompose, refine and extend the factors affecting the 5 primary indicators, making the hierarchy of the indicator system clearer and more operable.

[0079] (3) Determining the weights of evaluation indicators

[0080] The AHP is used to determine the weight of each evaluation index. The evaluation weight determination process is to make a corresponding AHP weight questionnaire according to the established evaluation system, distribute it to 10 professional personnel engaged in the performance evaluation of the whole vehicle air conditioning system, and ask the professional personnel to independently score the comparison value according to their understanding of the evaluation index, and conduct statistics. According to the AHP principle, the judgment matrix between the target layer and each first-level index, the judgment matrix between each first-level index and the second-level index factor are obtained, and the characteristic vector W and the maximum eigenvalue λ of each judgment matrix are calculated max , and C R . By summarizing the above results, the weight of each evaluation index of the performance test of the automatic air conditioner of the passenger car in the non-automatic mode is finally obtained as shown in Figure 5 ;

[0081] (4) The evaluation index system of the air conditioning performance and evaluation test of the automatic air conditioning of the passenger car in the non-automatic mode in summer has been established, and the weight of each evaluation index is also determined by AHP. Finally, the scoring and weighting method is used to evaluate each index of the test. According to the relevant test database of the air conditioning performance test of the automatic air conditioning of the passenger car in the non-automatic mode in summer and the experience of professional evaluators, the scoring standard is established for each evaluation project (first-level index). The subjective evaluation and objective test are combined to score according to Figure 6 ;

[0082] (5) Figure 6 The temperature of the blowing face outlet, the average temperature fluctuation of the blowing face outlet, the average head temperature, and the average head temperature fluctuation are measured by objective test in

[0083] (6) In the actual case application, the objective test results and the subjective evaluation results of each evaluation project of the air conditioning performance test of the automatic air conditioning of the passenger car in the non-automatic mode in summer are used to obtain the evaluation of each evaluation project by using the evaluation index system established in this paper and referring to the evaluation project scoring standard in Figure 6 . Combined with the weight of each evaluation project calculated by AHP, the comprehensive evaluation of the test performance is obtained by using the weighting method. Finally, according to the evaluation results, it is judged whether the air conditioning performance of the automatic air conditioning of the passenger car in the non-automatic mode in summer meets the requirements.

[0084] The above describes in detail the non-automatic mode air conditioning performance test method and evaluation method of the automatic air conditioner for passenger cars in summer according to the present application, and the principle and implementation mode of the present application are described by using specific examples, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the field, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. A method for evaluating the performance of a summer automatic air conditioner of a passenger vehicle in a non-automatic mode, said method being implemented using a test method for evaluating the performance of a summer automatic air conditioner of a passenger vehicle in a non-automatic mode, characterized in that, It comprises the following steps: Step S1, arranging sensors at the positions of the air outlet of the vehicle to be tested and the head of the passenger compartment of the vehicle to be tested in the environment simulation laboratory respectively; Step S2, setting the road load of the vehicle to be tested; Step S3, ensuring that the temperature in the vehicle to be tested is the same as the temperature in the environment simulation laboratory, opening the sunlight simulation system to set the sunshine to start the vehicle baking when the average temperature of the head of the passenger compartment of the vehicle to be tested reaches the specified temperature, and covering the vehicle for a period of time; Step S4, keeping the vehicle to be tested to travel at a constant speed, setting the air conditioner to the middle gear to cool the vehicle to be tested, then adjusting the air conditioner to a lower gear to perform a low noise test, idling for a period of time, then adjusting the air conditioner to a lower gear again when the temperature in the vehicle to be tested is stable at the temperature set by the air conditioner, and idling for a period of time, thereby completing the non-automatic mode air conditioning performance test of the summer automatic air conditioner of the vehicle to be tested; The evaluation method comprises the following steps: Step one, taking the temperature of the air outlet of the vehicle to be tested, the average temperature of the head, the average temperature fluctuation of the head, the average temperature fluctuation of the air outlet, and subjective evaluation as evaluation indexes; The five types of performance indexes of the temperature of the air outlet of the vehicle to be tested, the average temperature of the head, the average temperature fluctuation of the head, the average temperature fluctuation of the air outlet, and subjective evaluation are selected as evaluation indexes, the selection object is the target layer, the performance index is a first-level index, and the corresponding index is a second-level index; Step two, determining the weight of the temperature of the air outlet of the vehicle to be tested, the average temperature of the head, the average temperature fluctuation of the head, the average temperature fluctuation of the air outlet, and subjective evaluation by using AHP; Step three, performing performance evaluation on the temperature of the air outlet of the vehicle to be tested, the average temperature of the head, the average temperature fluctuation of the head, the average temperature fluctuation of the air outlet, and subjective evaluation by using the scoring and weighting method; Step four, one-to-one corresponding the performance results of objective measurement of each evaluation item with subjective evaluation.

2. The method for evaluating the performance of a passenger vehicle's summer automatic air conditioner in a non-automatic mode according to claim 1, characterized in that, In step S1, the sensor is arranged at a position 1m in front of the vehicle in the environment simulation laboratory; In step S1, the sensor is arranged at a position 1m in front of the vehicle in the environment simulation laboratory; In step S1, the sensor is arranged at a position 1m in front of the vehicle in the environment simulation laboratory; 3. The method for evaluating the performance of a passenger vehicle's summer automatic air conditioner in a non-automatic mode according to claim 1, characterized in that, In step S2, the formula of the road load setting is: where F is the road load of the vehicle to be tested, C D where F is the road load of the vehicle to be tested, C D where F is the road load of the vehicle to be tested, C D where F is the road load of the vehicle to be tested, C D where F is the road load of the vehicle to be tested, C D where F is the road load of the vehicle to be tested, C D where F is the road load of the vehicle to be tested, C D where F is the road load of the vehicle to be tested 4. The method for evaluating the performance of a passenger vehicle's summer automatic air conditioner in a non-automatic mode according to claim 1, characterized in that, In step S3, the method for ensuring that the temperature in the vehicle to be tested is the same as the temperature in the environment simulation laboratory is: Opening all the doors and windows of the vehicle to be tested until the temperature in the vehicle to be tested is the same as the temperature in the environment simulation laboratory.

5. The method for evaluating the performance of a passenger vehicle's summer automatic air conditioner in a non-automatic mode as claimed in claim 1, wherein In step S3, the average temperature of the head reaching the specified temperature is 35℃±1℃.

6. The method for evaluating the performance of a passenger vehicle's summer automatic air conditioner in a non-automatic mode according to claim 1, characterized in that, In step S3, the sunlight set by the sunlight simulation system is 800W / ㎡.

7. The method for evaluating the performance of a passenger vehicle's summer automatic air conditioner in a non-automatic mode according to claim 1, characterized in that, The step S3, the car is kept for 30 min.

8. The method for evaluating the performance of a passenger vehicle's summer automatic air conditioner in a non-automatic mode according to claim 1, characterized in that, The step S4, the vehicle keeps uniform speed for 40 km / h.

9. The method for evaluating the performance of a passenger vehicle's summer automatic air conditioner in a non-automatic mode according to claim 1, characterized in that, The step S4, the vehicle keeps for 5 min.

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