A method and device for testing and evaluating vehicle heater performance

Abstract

The present invention discloses a method and device for testing and evaluating the heating performance of a vehicle heater. The method and device start the vehicle's heater system and control the vehicle to travel under multiple working conditions; record the measured temperatures of a test subject's feet and head in the cab during the vehicle's travel, and the test subject scores the comfort level in the vehicle at each first time interval, wherein the higher the temperature in the vehicle felt by the test subject is, the higher the comfort level is; evaluate the heating performance of the heater system based on the measured temperatures of the test subject's feet and head and the comfort level score, thereby achieving an evaluation of the heating performance of the vehicle heater system by combining objective data with subjective data, and the evaluation results are clearly expressed and more in line with the user experience of the driver and passengers.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle performance testing, and in particular to a method and device for testing and evaluating the heating performance of a vehicle heater. Background Art

[0002] With the development of the automotive industry, consumers are increasingly demanding the comfort of commercial vehicles. In the northern commercial vehicle market, the performance of a vehicle's heating system has become a key factor in determining whether consumers will purchase a vehicle. Commercial vehicles primarily rely on heating systems for heat exchange, raising and maintaining the interior temperature and providing thermal comfort for drivers and passengers in low-temperature environments.

[0003] The current mainstream heating performance test, Chapter 4 of the national standard GB / T 12782, only stipulates that at 40 and 60 minutes into the heating test at an ambient temperature of -25 ± 3°C, the front passenger's foot temperature must be no less than 15°C, and the foot temperature of other passengers must be no less than 12°C. However, measuring the driver's or passenger's foot temperature alone cannot fully reflect the heating performance of the heating system, and no evaluation method is provided for the heating capacity and effectiveness of the heating system. Summary of the Invention

[0004] The present application provides a method and device for testing and evaluating the heating performance of a vehicle heater, which can solve the technical problem in the prior art that only the temperature measurement results of the driver and passengers' feet cannot well reflect the heating performance of the heater system.

[0005] In a first aspect, embodiments of the present application provide a method for testing and evaluating vehicle heater heating performance, the method comprising:

[0006] Turning on a vehicle's heating system and controlling the vehicle to travel under various operating conditions;

[0007] recording the measured temperatures of the test subject's feet and head in the cab during driving of the vehicle, and the test subject's rating of the comfort level in the cab at each first time interval, wherein the higher the temperature in the cab felt by the test subject, the higher the comfort level;

[0008] The heating performance of the warm air system is evaluated based on the measured temperatures at the feet and head of the test subjects and the comfort score.

[0009] In combination with the first aspect, in one embodiment, turning on the vehicle's heating system and controlling the vehicle to travel under multiple operating conditions includes:

[0010] Closing the doors, windows, and vents of the vehicle, controlling the heating system to turn on and set it to the front windshield demisting, external circulation, highest temperature, and maximum air volume mode, and running it for a second duration;

[0011] After the second time period, the heating system is controlled to be adjusted to a foot-blowing, external circulation, highest temperature and maximum air volume mode, and the vehicle is controlled to travel under multiple operating conditions for a third time period;

[0012] The operating conditions include: preset low-speed operating conditions, medium-high-speed operating conditions, high-speed operating conditions and idle speed operating conditions.

[0013] In one embodiment, evaluating the heating performance of the heating system based on the measured temperatures at the feet and head of the test subject and the comfort score includes:

[0014] The objective test maximum heating capacity score of the heating system is calculated based on the highest measured temperature at the feet and head of all test subjects and the maximum design temperature of the vehicle cab when the heating system is installed:

[0015]

[0016] Wherein, A is the maximum heating capacity score of the objective test, T max is the maximum measured temperature, T a is the maximum design temperature, M is the benchmark score, and N is the scoring coefficient;

[0017] Based on the fourth time taken for the feet and heads of all test subjects to reach the preset target temperature, and the designed time taken by the heating system to bring the cabin temperature to the target temperature, the objective test maximum heating efficiency score of the heating system is calculated:

[0018]

[0019] Wherein, B is the maximum heating efficiency score of the objective test, t is the fourth time duration, and ta is the design time duration;

[0020] determining a subjectively evaluated maximum heating capacity score of the heating system according to a highest score among the comfort scores, wherein the higher the highest score among the comfort scores, the higher the subjectively evaluated maximum heating capacity score;

[0021] determining a subjectively evaluated maximum heating rate score of the heating system according to the time it takes for the comfort score to reach the most comfortable level, wherein the shorter the time it takes for the comfort score to reach the most comfortable level, the higher the subjectively evaluated maximum heating rate score;

[0022] The heating performance of the warm air system is evaluated according to the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score.

[0023] In one embodiment, evaluating the heating performance of the heater system based on the objectively tested maximum heating capacity score, the objectively tested maximum heating efficiency score, the subjectively evaluated maximum heating capacity score, and the subjectively evaluated maximum heating rate score includes:

[0024] multiplying the objective test maximum heating capacity score and the subjective evaluation maximum heating capacity score by a preset first weight coefficient, and adding the results to obtain the maximum heating capacity score of the heating system;

[0025] multiplying the objective test maximum heating efficiency score and the subjective evaluation maximum heating efficiency score by a preset second weight coefficient, and adding the results to obtain a maximum heating efficiency score of the heating system;

[0026] The objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score and the subjective evaluation maximum heating rate score are multiplied by a preset third weight coefficient respectively, and the results are added to obtain the maximum heating performance score of the warm air system.

[0027] In one embodiment, after evaluating the heating performance of the heating system based on the objectively tested maximum heating capacity score, the objectively tested maximum heating efficiency score, the subjectively evaluated maximum heating capacity score, and the subjectively evaluated maximum heating rate score, the further step further includes:

[0028] Whether to improve the design of the heating system is determined according to the maximum heating capacity score, the maximum heating efficiency score, and the heating performance score of the heating system.

[0029] In one embodiment, before turning on the vehicle's heating system and controlling the vehicle to travel under various operating conditions, the method further includes:

[0030] The vehicle doors, windows, and vents are opened, and the vehicle is immersed in the preset temperature for a fifth time period.

[0031] In one embodiment, before turning on the vehicle's heating system and controlling the vehicle to travel under various operating conditions, the method further includes:

[0032] A test subject is arranged at the main driver's seat and the co-driver's seat of the vehicle respectively. If the vehicle has a double-row seat cab, at least one test subject is arranged at the back row of the cab.

[0033] In one embodiment, the method further includes:

[0034] Before turning on the heater of the vehicle, it is determined whether there is a leak in the pipe of the heater system.

[0035] In a second aspect, an embodiment of the present application provides a device for testing and evaluating the heating performance of a vehicle heater, the device comprising:

[0036] A control module, configured to activate a vehicle heating system and control the vehicle to travel under various operating conditions;

[0037] a recording module configured to record the measured temperatures of the feet and head of the test subject in the driving cabin during driving of the vehicle, and a comfort score of the test subject in the vehicle at intervals of a first time period, wherein the higher the temperature in the vehicle perceived by the test subject, the higher the comfort score;

[0038] An evaluation module is used to evaluate the heating performance of the warm air system according to the measured temperatures at the feet and head of the test subject and the comfort score.

[0039] In conjunction with the second aspect, in one embodiment, the control module is further configured to:

[0040] Closing the doors, windows, and vents of the vehicle, controlling the heating system to turn on and set it to the front windshield demisting, external circulation, highest temperature, and maximum air volume mode, and running it for a second duration;

[0041] After the second time period, the heating system is controlled to be adjusted to a foot-blowing, external circulation, highest temperature and maximum air volume mode, and the vehicle is controlled to travel under multiple operating conditions for a third time period;

[0042] The operating conditions include: preset low-speed operating conditions, medium-high-speed operating conditions, high-speed operating conditions and idle speed operating conditions.

[0043] An embodiment of the present application provides a method and device for testing and evaluating the heating performance of a vehicle heater, which turns on the vehicle's heater system and controls the vehicle to travel under various working conditions; records the measured temperatures of the feet and head of a test subject in the cab during the vehicle's travel, and the test subject scores the comfort level in the vehicle at every first time interval, wherein the higher the temperature in the vehicle felt by the test subject, the higher the comfort level; and evaluates the heating performance of the heater system based on the measured temperatures of the feet and head of the test subject and the comfort level score, thereby achieving an evaluation of the heating performance of the vehicle heater system by combining objective and subjective data, with the evaluation results being clearly expressed and more in line with the user experience of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1This is a flow chart of an embodiment of a method for testing and evaluating vehicle heater performance according to the present application;

[0045] Figure 2 This is a schematic diagram of the layout of foot and head temperature measurement points for this application;

[0046] Figure 3 This is a functional module diagram of an embodiment of a device for testing and evaluating the heating performance of a vehicle heater according to the present application. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0049] In a first aspect, an embodiment of the present application provides a method for testing and evaluating the heating performance of a vehicle heater.

[0050] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the method for testing and evaluating the vehicle heater performance of this application. Figure 1 As shown, the test and evaluation methods for vehicle heater heating performance include:

[0051] Step S101: Turn on the vehicle's heating system and control the vehicle to travel under various working conditions.

[0052] It is worth noting that the following preparations need to be made before turning on the vehicle's heating system and controlling the vehicle to drive under various road conditions, that is, before entering the test.

[0053] Before the test begins, check that all vehicle systems are in normal condition and check the heater system for leaks. If any vehicle system is abnormal or the heater system is leaking, the test will not continue and a fault warning will be issued to prompt maintenance personnel to perform repairs. The test will continue after confirming that all vehicle systems are normal and the heater system pipes are leaking.

[0054] Arrange temperature sensors at the seats in the vehicle cab. The temperature sensor layout reference Figure 2As shown, the layout of the ambient temperature sensors can refer to the provisions of 6.1.2 of the national standard GB / T 12782, and the temperature sensors are connected to the temperature acquisition equipment so that the temperature sensors can collect the temperature of the feet and head of the test subjects in the cab during the test.

[0055] In one embodiment, before turning on the vehicle's heater and controlling the vehicle to travel under various road conditions, the process further includes: opening the vehicle's doors, windows, and vents and immersing the vehicle in a preset temperature for a fifth period of time. In this embodiment, the preset temperature is -25±3°C, and the fifth period is 10 hours. Specifically, the vehicle is parked outdoors, with the doors, windows, and vents open, and immersed in an environment at a temperature not lower than -25±3°C for 10 hours to fully cool the vehicle's cab.

[0056] Furthermore, when the ambient temperature inside the vehicle is within the range of -25±3°C, the evaluation test is prepared. The test subject may wear non-cold-proof clothing and non-cold-proof shoes, and must acclimate to the ambient temperature of -25±3°C outdoors for at least 10 minutes before the test begins. In this embodiment, one test subject is seated in the driver's seat and one test subject is seated in the passenger seat of the vehicle. If the vehicle has a double-row cab, at least one test subject is seated behind the cab in the middle of the rear row.

[0057] In one embodiment, the vehicle's heating system is turned on, and the vehicle is controlled to travel under various road conditions, including: closing the vehicle's doors, windows and vents, controlling the heating system to turn on and set to the front gear defogger, external circulation, highest temperature and maximum air volume mode, and running for a second time period; after the second time period, controlling the heating system to adjust to the foot blowing, external circulation, highest temperature and maximum air volume mode, and controlling the vehicle to travel under various road conditions for a third time period; wherein the road conditions include: preset low-speed road conditions, medium-high-speed road conditions, high-speed road conditions and idle road conditions.

[0058] For example, in this embodiment, the second duration is 2 minutes, and the third duration is 60 minutes. After the test subject is in place, the vehicle doors, windows, and vents are closed, the vehicle is started, and the temperature acquisition device is started. The heating system is adjusted to the front windshield demisting, external circulation, highest temperature, and maximum air volume mode. The vehicle is warmed up and demisted in place for 2 minutes. After 2 minutes, the heating system is adjusted to the foot blowing, external circulation, highest temperature, and maximum air volume mode. The vehicle sequentially enters the low-speed operating condition (for simulating urban operating conditions), the medium-high speed operating condition (for simulating urban expressway or national highway operating conditions), the high-speed operating condition (for simulating highway operating conditions), and the idling operating condition (for simulating parking operating conditions). The vehicle runs in the low-speed operating condition and the idling operating condition for 10 minutes each, and the medium-high speed operating condition and the high-speed operating condition for 20 minutes each, for a total of the third duration, i.e., 60 minutes. The speed requirements for various operating conditions are shown in Table 1.

[0059] Table 1 Evaluation of vehicle speed requirements

[0060] Low speed medium-high speed high speed Idle Simulated working conditions Urban conditions Urban expressway or national highway conditions High-speed conditions Parking conditions Maximum speed km / h ≤40 ≤80 ≤100 0 Average speed km / h 20 50 80 0

[0061] Preferably, during the test, if the vehicle's windshield is fogged, the foot blowing mode can be switched to the windshield defogger mode, and the other modes remain unchanged. After defogger is completed and safety is ensured, the mode can be switched back to the foot blowing mode to ensure vehicle driving safety.

[0062] Step S102: Record the measured temperatures of the test subject's feet and head in the cab during driving of the vehicle, and the test subject's score for the comfort level in the vehicle at each first time interval, wherein the higher the temperature in the vehicle felt by the test subject is, the higher the comfort level score is.

[0063] Exemplarily, the first duration is 2 minutes, that is, each test subject scores the comfort level in the car every 2 minutes during the test, and the scoring criteria are shown in Table 2.

[0064] Table 2 Comfort level scoring standard for heating system

[0065]

[0066] Scoring is performed according to the standards in Table 2. After the test is completed, the test subjects in the driver's seat, the front passenger seat, and the middle rear seat will give their scores on the comfort level of the vehicle at two-minute intervals under low-speed conditions, medium- and high-speed conditions, high-speed conditions, and idle conditions.

[0067] For the recorded temperatures of the test subjects' feet and heads in the cab during driving, the time and maximum temperature of the test subjects' feet and heads first reaching 15°C (15°C) can be read after the test is completed, for the driver's seat, front passenger seat, and rear middle seat. The time to first reach 15°C is defined as the temperature being no less than 15°C for 1 consecutive minute; the maximum temperature is defined as the temperature increasing by less than 0.3°C for 5 consecutive minutes.

[0068] Step S103 : Evaluate the heating performance of the heating system according to the measured temperatures at the feet and head of the test subject and the comfort score.

[0069] It is worth noting that, in this embodiment, the measured temperatures at the feet and head of the test subject are objective data for evaluating the heating capacity of the warm air system, and the comfort score of the test subject is subjective data for evaluating the heating performance of the warm air system. The heating performance of the vehicle warm air system is evaluated by combining objective and subjective data. The evaluation results are clearly expressed and more in line with the user experience of the driver and passengers.

[0070] Specifically, the heating performance of the heating system is evaluated according to the measured temperatures at the feet and head of the test subject and the comfort score, including steps S201 to S205:

[0071] Step S201: Calculate the objective test maximum heating capacity score of the heating system based on the highest measured temperature of the feet and heads of all test subjects and the maximum design temperature of the heating system installed in the vehicle cab:

[0072]

[0073] Wherein, A is the maximum heating capacity score of the objective test, T max is the maximum measured temperature, T a The maximum design temperature of the heating system when the heating system is installed in the vehicle cab, M is the benchmark score, and N is the scoring coefficient. max and T a When it is a non-integer, it can be rounded up. In this embodiment, the value of M is 7.5 and the value of N is 0.25.

[0074] Step S202: Calculate the objective test maximum heating efficiency score of the heating system based on the fourth time period for the feet and heads of all test subjects to reach the preset target temperature and the designed time period for the heating system to bring the cabin temperature to the target temperature:

[0075]

[0076] Where B is the maximum heating efficiency score from the objective test, t is the fourth duration, and ta is the design duration. The design duration ta specifically refers to the target design time for the temperatures of the driver's foot, driver's head, passenger's foot, passenger's head, rear middle foot (if present), and rear middle head (if present) to all reach 15°C. When t and ta are non-integer values, they may be rounded off.

[0077] Step S203: determining a subjectively evaluated maximum heating capacity score of the heating system according to the highest score in the comfort scores, wherein the higher the highest score in the comfort scores, the higher the subjectively evaluated maximum heating capacity score.

[0078] Step S204: determining a subjectively evaluated maximum heating rate score of the heating system according to the time when the comfort score reaches the most comfortable level, wherein the shorter the time when the comfort score reaches the most comfortable level, the higher the subjectively evaluated maximum heating rate score.

[0079] The time when the comfort score in this embodiment reaches the most comfortable level is the time when the comfort score reaches 5 points in Table 2, that is, the test subject feels neither too cold nor too hot, which is just the right level of comfort.

[0080] For example, the subjective evaluation criteria for the heating capacity of the heating system are shown in Table 3.

[0081] Table 3 Subjective evaluation criteria for warm air heating capacity

[0082]

[0083] It is worth noting that, in Table 3, when the highest score in the comfort score is greater than or equal to 7.5 points, the subjective evaluation maximum heating capacity score of the warm air system is 7.5 points and above; when the highest score in the comfort score is less than 7.5 points and greater than or equal to 6.5 points, the subjective evaluation maximum heating capacity score of the warm air system is 7.25 points; when the comfort score is less than 6.5 points and greater than or equal to 5.5 points, the subjective evaluation maximum heating capacity score of the warm air system is 7 points; when the comfort score is less than 5.5 points and greater than or equal to 5 points, the subjective evaluation maximum heating capacity score of the warm air system is 6.75 points; when the highest score in the comfort score is less than 5 points, the subjective evaluation maximum heating capacity score of the warm air system is 6.5 points and below.

[0084] When the time when the comfort score reaches the most comfortable level is less than or equal to 16 minutes, the subjective evaluation maximum heating capacity score of the heating system is 7.5 points or above; when the time when the comfort score reaches the most comfortable level is greater than 16 minutes and less than or equal to 22 minutes, the subjective evaluation maximum heating capacity score of the heating system is 7.25 points; when the time when the comfort score reaches the most comfortable level is greater than 22 minutes and less than or equal to 28 minutes, the subjective evaluation maximum heating capacity score of the heating system is 7 points; when the time when the comfort score reaches the most comfortable level is greater than 28 minutes and less than or equal to 34 minutes, the subjective evaluation maximum heating capacity score of the heating system is 6.75 points; when the time when the comfort score reaches the most comfortable level is greater than 34 minutes, the subjective evaluation maximum heating capacity score of the heating system is 6.5 points or below.

[0085] Step S204 : Evaluate the heating performance of the warm air system according to the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score.

[0086] In one embodiment, the objective test maximum heating capacity score and the subjective evaluation maximum heating capacity score are respectively multiplied by a preset first weight coefficient, and the results are added to obtain the maximum heating capacity score of the heating system.

[0087] For example, the first weight coefficient is 0.5, and the maximum heating capacity score of the heating system = 0.5P + 0.5A, where P is the subjective evaluation maximum heating capacity score and A is the objective test maximum heating capacity score.

[0088] In one embodiment, the objective test maximum heating efficiency score and the subjective evaluation maximum heating efficiency score are respectively multiplied by a preset second weight coefficient, and the results are added to obtain the maximum heating efficiency score of the heating system.

[0089] For example, the first weight coefficient is 0.5, and the maximum heating efficiency score of the heating system = 0.5Q + 0.5B, where Q is the maximum heating efficiency score of subjective evaluation and B is the maximum heating efficiency score of objective testing.

[0090] In one embodiment, the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score are multiplied by a preset third weight coefficient, and the results are added to obtain the maximum heating performance score of the warm air system.

[0091] For example, the third weight coefficient is 0.25, and the maximum heating performance score of the heating system = 0.25P + 0.25Q + 0.25A + 0.25B, where P is the subjective evaluation of the maximum heating capacity score, Q is the subjective evaluation of the maximum heating efficiency score, A is the objective test of the maximum heating capacity score, and B is the objective test of the maximum heating efficiency score.

[0092] As a preferred real-time method, after evaluating the heating performance of the heating system according to the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score, the method further includes:

[0093] Whether to improve the design of the heating system is determined according to the maximum heating capacity score, the maximum heating efficiency score, and the heating performance score of the heating system.

[0094] Exemplarily, when the maximum heating capacity score, maximum heating efficiency score, or heating performance score of the heating system is greater than or equal to a preset first score threshold, it is determined that the heating system does not need to be improved; when the maximum heating capacity score, maximum heating efficiency score, or heating performance score is less than the first score threshold and greater than or equal to a second score threshold, it is determined that the heating system will be improved in the next generation vehicle; when the maximum heating capacity score, maximum heating efficiency score, or heating performance score is less than the second score threshold, it is determined that the heating system will be improved immediately. In this embodiment, the first score threshold set is 7 points, and the second score threshold is 6.5 points. Specific heating system improvement requirement standards are shown in Table 4.

[0095] Table 4 Heating system improvement requirements standard table.

[0096] score evaluate Customer demands Customers may find Improvement needs 1 Extremely bad All customer complaints have repair requirements 100％ improve 2 Very bad All customer complaints have repair requirements 100％ improve 3 not good All customer complaints have repair requirements 100％ improve 4 No one can accept it All customer complaints have repair requirements 100％ improve 5 Unacceptable Notice and feel disgusted, complain and request repairs 50％ improve 5.5 Some cannot Found that there are complaints and some customers have asked for repairs 35％ improve 6 The most acceptable A few customers asked to file complaints 20％ Suggest improvements 6.5 Acceptable but limited Picky customers will complain 5％ Next-generation car improvements 7 Can accept everything with satisfaction No customers will complain 0％ No improvement 8 Good intentions No customers will complain 0％ No improvement 9 very good No customers will complain 0％ No improvement 10 excellence No customers will complain 0％ No improvement

[0097] This embodiment provides a method for testing and evaluating vehicle heater performance. Under specified conditions, real-time foot and head temperatures are measured. Simultaneously, subjective evaluators assess and score the vehicle's thermal comfort every two minutes. The method defines the heater's maximum heating capacity and maximum heating rate. By combining objective, real-time foot and head temperature measurements with subjective evaluations, the objective test data and subjective scores are weighted to comprehensively evaluate the vehicle heater system's heating performance. The method's benefits include: 1. The combined objective and subjective data provide clear evaluation results that better reflect the user experience; 2. It focuses on test process parameters, providing design references; 3. The equipment is easy to install and widely applicable; and 4. This method effectively supplements national standards.

[0098] In a second aspect, an embodiment of the present application also provides a device for testing and evaluating the heating performance of a vehicle heater.

[0099] In one embodiment, referring to Figure 3 , Figure 3 This is a functional module diagram of an embodiment of a device for testing and evaluating vehicle heater performance. Figure 3 As shown, the vehicle heater performance test and evaluation device includes:

[0100] A control module, configured to activate a vehicle heating system and control the vehicle to travel under various operating conditions;

[0101] a recording module configured to record the measured temperatures of the feet and head of the test subject in the driving cabin during driving of the vehicle, and a comfort score of the test subject in the vehicle at intervals of a first time period, wherein the higher the temperature in the vehicle perceived by the test subject, the higher the comfort score;

[0102] An evaluation module is used to evaluate the heating performance of the warm air system according to the measured temperatures at the feet and head of the test subject and the comfort score.

[0103] Furthermore, in one embodiment, the control module is further configured to:

[0104] Closing the doors, windows, and vents of the vehicle, controlling the heating system to turn on and set it to the front windshield demisting, external circulation, highest temperature, and maximum air volume mode, and running it for a second duration;

[0105] After the second time period, the heating system is controlled to be adjusted to a foot-blowing, external circulation, highest temperature and maximum air volume mode, and the vehicle is controlled to travel under multiple operating conditions for a third time period;

[0106] The operating conditions include: preset low-speed operating conditions, medium-high-speed operating conditions, high-speed operating conditions and idle speed operating conditions.

[0107] Furthermore, in one embodiment, the evaluation module is further configured to:

[0108] The objective test maximum heating capacity score of the heating system is calculated based on the highest measured temperature at the feet and head of all test subjects and the maximum design temperature of the vehicle cab when the heating system is installed:

[0109]

[0110] Wherein, A is the maximum heating capacity score of the objective test, T max is the maximum measured temperature, T a is the maximum design temperature, M is the benchmark score, and N is the scoring coefficient;

[0111] Based on the fourth time taken for the feet and heads of all test subjects to reach the preset target temperature, and the designed time taken by the heating system to bring the cabin temperature to the target temperature, the objective test maximum heating efficiency score of the heating system is calculated:

[0112]

[0113] Wherein, B is the maximum heating efficiency score of the objective test, t is the fourth time duration, and ta is the design time duration;

[0114] determining a subjectively evaluated maximum heating capacity score of the heating system according to a highest score among the comfort scores, wherein the higher the highest score among the comfort scores, the higher the subjectively evaluated maximum heating capacity score;

[0115] determining a subjectively evaluated maximum heating rate score of the heating system according to the time it takes for the comfort score to reach the most comfortable level, wherein the shorter the time it takes for the comfort score to reach the most comfortable level, the higher the subjectively evaluated maximum heating rate score;

[0116] The heating performance of the warm air system is evaluated according to the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score.

[0117] Furthermore, in one embodiment, the evaluation module is further configured to:

[0118] multiplying the objective test maximum heating capacity score and the subjective evaluation maximum heating capacity score by a preset first weight coefficient, and adding the results to obtain the maximum heating capacity score of the heating system;

[0119] multiplying the objective test maximum heating efficiency score and the subjective evaluation maximum heating efficiency score by a preset second weight coefficient, and adding the results to obtain a maximum heating efficiency score of the heating system;

[0120] The objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score and the subjective evaluation maximum heating rate score are multiplied by a preset third weight coefficient respectively, and the results are added to obtain the maximum heating performance score of the warm air system.

[0121] Furthermore, in one embodiment, the evaluation module is further configured to:

[0122] Whether to improve the design of the heating system is determined according to the maximum heating capacity score, the maximum heating efficiency score, and the heating performance score of the heating system.

[0123] Furthermore, in one embodiment, the device is also used to open doors, windows and vents of the vehicle and immerse the vehicle in a preset temperature for a fifth period of time.

[0124] Furthermore, in one embodiment, the device is also used for:

[0125] A test subject is arranged at the main driver's seat and the co-driver's seat of the vehicle respectively. If the vehicle has a double-row seat cab, at least one test subject is arranged at the back row of the cab.

[0126] Furthermore, in one embodiment, the device is also used for:

[0127] Before turning on the heater of the vehicle, it is determined whether there is a leak in the pipe of the heater system.

[0128] Among them, the functional implementation of each module in the above-mentioned vehicle heater heating performance testing and evaluation device corresponds to the various steps in the above-mentioned vehicle heater heating performance testing and evaluation method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0129] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0130] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0131] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0132] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0133] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0134] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0135] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for testing and evaluating the heating performance of a vehicle heater, characterized in that: The vehicle heater performance testing and evaluation method includes: Turning on a vehicle's heating system and controlling the vehicle to travel under various operating conditions; recording the measured temperatures of the test subject's feet and head in the cab during driving of the vehicle, and the test subject's rating of the comfort level in the cab at each first time interval, wherein the higher the temperature in the cab felt by the test subject, the higher the comfort level; evaluating the heating performance of the heating system based on the measured temperatures at the feet and head of the test subject and the comfort score; The heating performance of the heating system is evaluated based on the measured temperatures at the feet and head of the test subject and the comfort score, including: The objective test maximum heating capacity score of the heating system is calculated based on the highest measured temperature at the feet and head of all test subjects and the maximum design temperature of the vehicle cab when the heating system is installed: Among them, A is the maximum heating capacity score of the objective test, is the maximum measured temperature, is the maximum design temperature, is the benchmark score, and N is the scoring coefficient; Based on the fourth time taken for the feet and heads of all test subjects to reach the preset target temperature, and the designed time taken by the heating system to bring the cabin temperature to the target temperature, the objective test maximum heating efficiency score of the heating system is calculated: Wherein, B is the maximum heating efficiency score of the objective test, t is the fourth time length, The design duration; determining a subjectively evaluated maximum heating capacity score of the heating system according to a highest score among the comfort scores, wherein the higher the highest score among the comfort scores, the higher the subjectively evaluated maximum heating capacity score; determining a subjectively evaluated maximum heating rate score of the heating system according to the time it takes for the comfort score to reach the most comfortable level, wherein the shorter the time it takes for the comfort score to reach the most comfortable level, the higher the subjectively evaluated maximum heating rate score; The heating performance of the warm air system is evaluated according to the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score.

2. The method for testing and evaluating vehicle heater performance according to claim 1, wherein: The vehicle's heating system is turned on and the vehicle is controlled to travel under various operating conditions, including: Closing the doors, windows, and vents of the vehicle, controlling the heating system to turn on and set it to the front windshield demisting, external circulation, highest temperature, and maximum air volume mode, and running it for a second duration; After the second time period, the heating system is controlled to be adjusted to a foot-blowing, external circulation, highest temperature and maximum air volume mode, and the vehicle is controlled to travel under multiple operating conditions for a third time period; The operating conditions include: preset low-speed operating conditions, medium-high-speed operating conditions, high-speed operating conditions and idle speed operating conditions.

3. The method for testing and evaluating vehicle heater performance according to claim 1, wherein: The evaluating the heating performance of the warm air system according to the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score includes: multiplying the objective test maximum heating capacity score and the subjective evaluation maximum heating capacity score by a preset first weight coefficient, and adding the results to obtain the maximum heating capacity score of the heating system; multiplying the objective test maximum heating efficiency score and the subjective evaluation maximum heating efficiency score by a preset second weight coefficient, and adding the results to obtain a maximum heating efficiency score of the heating system; The objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score and the subjective evaluation maximum heating rate score are multiplied by a preset third weight coefficient respectively, and the results are added to obtain the maximum heating performance score of the warm air system.

4. The method for testing and evaluating vehicle heater performance according to claim 3, wherein: After evaluating the heating performance of the warm air system according to the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score, the further step includes: Whether to improve the design of the heating system is determined according to the maximum heating capacity score, the maximum heating efficiency score, and the heating performance score of the heating system.

5. The method for testing and evaluating vehicle heater performance according to claim 1, wherein: Before turning on the vehicle's heating system and controlling the vehicle to travel under various operating conditions, the method further includes: The vehicle doors, windows, and vents are opened, and the vehicle is immersed in the preset temperature for a fifth time period.

6. The method for testing and evaluating vehicle heater performance according to claim 1, wherein: Before turning on the vehicle's heating system and controlling the vehicle to travel under various operating conditions, the method further includes: A test subject is arranged at the main driver's seat and the co-driver's seat of the vehicle respectively. If the vehicle has a double-row seat cab, at least one test subject is arranged at the back row of the cab.

7. The method for testing and evaluating vehicle heater performance according to claim 1, wherein: The method further includes: Before turning on the heater of the vehicle, it is determined whether there is a leak in the pipe of the heater system.

8. A device for testing and evaluating the heating performance of a vehicle heater, characterized in that: The vehicle heater performance testing and evaluation device comprises: a control module for turning on a vehicle's heating system and controlling the vehicle to travel under various operating conditions; a recording module configured to record the measured temperatures of the feet and head of the test subject in the driving cabin during driving of the vehicle, and a comfort score of the test subject in the vehicle at intervals of a first time period, wherein the higher the temperature in the vehicle perceived by the test subject, the higher the comfort score; an evaluation module for evaluating the heating performance of the heating system based on the measured temperatures at the feet and head of the test subject and the comfort score; Wherein, the evaluation module is also used for: The objective test maximum heating capacity score of the heating system is calculated based on the highest measured temperature at the feet and head of all test subjects and the maximum design temperature of the vehicle cab when the heating system is installed: Among them, A is the maximum heating capacity score of the objective test, is the maximum measured temperature, is the maximum design temperature, is the benchmark score, and N is the scoring coefficient; Based on the fourth time taken for the feet and heads of all test subjects to reach the preset target temperature, and the designed time taken by the heating system to bring the cabin temperature to the target temperature, the objective test maximum heating efficiency score of the heating system is calculated: Wherein, B is the maximum heating efficiency score of the objective test, t is the fourth time length, The design duration; determining a subjectively evaluated maximum heating capacity score of the heating system according to a highest score among the comfort scores, wherein the higher the highest score among the comfort scores, the higher the subjectively evaluated maximum heating capacity score; determining a subjectively evaluated maximum heating rate score of the heating system according to the time it takes for the comfort score to reach the most comfortable level, wherein the shorter the time it takes for the comfort score to reach the most comfortable level, the higher the subjectively evaluated maximum heating rate score; The heating performance of the warm air system is evaluated according to the objective test maximum heating capacity score, the objective test maximum heating efficiency score, the subjective evaluation maximum heating capacity score, and the subjective evaluation maximum heating rate score.

9. The vehicle heater performance testing and evaluation device according to claim 8, characterized in that: The control module is further configured to: Closing the doors, windows, and vents of the vehicle, controlling the heating system to turn on and set it to the front windshield demisting, external circulation, highest temperature, and maximum air volume mode, and running it for a second duration; After the second time period, the heating system is controlled to be adjusted to a foot-blowing, external circulation, highest temperature and maximum air volume mode, and the vehicle is controlled to travel under multiple operating conditions for a third time period; The operating conditions include: preset low-speed operating conditions, medium-high-speed operating conditions, high-speed operating conditions and idle speed operating conditions.

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