Device and method for measuring air distribution ratio of air outlet of automobile air conditioner

Abstract

The invention relates to a device for measuring the air distribution ratio of an air outlet of an automobile air conditioner, and the device comprises a plurality of measurers which are respectively connected with a plurality of to-be-measured air outlets of the automobile air conditioner. The measurer comprises a shell, a first pressure meter, a second pressure meter, a temperature and humidity sensor and an anemograph, the shell is provided with a measurement air outlet and a measurement air inlet, and the measurement air inlet is used for being communicated with an air outlet of an automobile air conditioner to be measured; the first pressure gauge is arranged at the measuring air inlet, the second pressure gauge is arranged at the measuring air outlet, the temperature and humidity sensor is arranged at the measuring air inlet, and the anemograph is arranged in the shell and used for measuring the flowing speed of air flowing from the measuring air inlet to the measuring air outlet. The invention further relates to a method for measuring the air distribution ratio of the air outlet of the automobile air conditioner. The air speed of each air outlet of the to-be-detected automobile air conditioner can be measured at the same time, and the air distribution ratio of each air outlet is calculated, so that the performance of each air outlet of the automobile air conditioner can be judged.

Description

Technical Field

[0001] The present invention relates to the technical field of air volume detection of air conditioners, and particularly relates to a measuring device and a measuring method for the air distribution ratio of an automobile air conditioner air outlet. Background Art

[0002] With the increasing requirements of consumers for the riding comfort of automobiles and the increasingly fierce competition in the automobile market, the thermal comfort performance of the in-vehicle air control system directly affects the user's evaluation of the vehicle. The air volume performance of the vehicle air conditioner directly affects the vehicle's refrigeration, heating, defrosting and demisting capabilities, etc.

[0003] Existing measuring devices for the air volume of automobile air conditioner air outlets include a static pressure box and a wind tunnel box. The static pressure box is connected to the wind tunnel box and a static pressure acquisition device; in the wind tunnel box, there are a first flow stabilizer screen, a nozzle, a second flow stabilizer screen, an auxiliary fan, a temperature and humidity acquisition device, and a differential pressure acquisition device; the temperature and humidity acquisition device, the differential pressure acquisition device, and the atmospheric pressure acquisition device are all connected to a static differential pressure processing module, and the static differential pressure processing module is connected to a data acquisition module. By setting a static pressure box at the front end of the wind tunnel box and an auxiliary fan at the rear end of the wind tunnel box, and then adjusting the rotation speed of the auxiliary fan to make the static pressure value in the static pressure box reach a set value, the measuring device can be directly placed in the actual vehicle to measure the air volume of the air conditioner air outlet under static or dynamic conditions of the vehicle.

[0004] Although the above-mentioned existing measuring device for the air volume of automobile air conditioner air outlets can measure the air volume of the air conditioner air outlet, it cannot measure the air outlet in a narrow space. In addition, the measuring device can only measure a single air outlet, while there are multiple air outlets in an automobile air conditioner. Using the above-mentioned measuring device to measure multiple air outlets of the automobile air conditioner separately takes a long time, and the errors will accumulate during the measurement, resulting in a large deviation between the total air volume of the whole vehicle air conditioning system measured and the actual value, and the air distribution ratio is not accurate enough. Summary of the Invention

[0005] Aiming at the technical problems existing in the prior art, the object of the present invention is to provide a measuring device for the air distribution ratio of an automobile air conditioner air outlet, which realizes the simultaneous measurement of multiple air outlets of the automobile air conditioner, and solves the problems that using the existing measuring device to measure multiple air outlets of the automobile air conditioner separately takes a long time, and the errors will accumulate during the measurement, resulting in a large deviation between the total air volume of the whole vehicle air conditioning system measured and the actual value, and the air distribution ratio is not accurate enough.

[0006] Another object of the present invention is to provide a measuring method for the air distribution ratio of an automobile air conditioner air outlet, which improves the measurement efficiency and accuracy of the air volume of multiple air outlets of the automobile air conditioner.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A measuring device for the air distribution ratio of an automotive air-conditioning air outlet, comprising a plurality of measuring instruments, each of the plurality of measuring instruments being connected to a plurality of automotive air-conditioning air outlets to be measured; each measuring instrument includes a housing, a first pressure gauge, a second pressure gauge, a temperature and humidity sensor, and an anemometer. The housing is provided with a measuring air outlet and a measuring air inlet, and the measuring air inlet is used to communicate with the automotive air-conditioning air outlet to be measured; the first pressure gauge is arranged at the measuring air inlet, the second pressure gauge is arranged at the measuring air outlet, the temperature and humidity sensor is arranged at the measuring air inlet, and the anemometer is arranged inside the housing to measure the air flow velocity flowing from the measuring air inlet to the measuring air outlet.

[0009] As a preference, the measuring instrument further includes a connecting pipe and a connector. One end of the connecting pipe is hermetically connected to the measuring air inlet, and the other end of the connecting pipe is connected to the connector, and the connector is used to connect to the automotive air-conditioning air outlet to be measured.

[0010] As a preference, the measuring device further includes an installation cabinet, and a plurality of measuring instruments are all arranged on the installation cabinet.

[0011] As a preference, the installation cabinet is provided with a plurality of installation holes adapted to the measuring air inlets, and the measuring air inlets of the plurality of measuring instruments are respectively assembled with the plurality of installation holes.

[0012] As a preference, the installation cabinet is provided with a plurality of evacuation notches, and the plurality of evacuation notches respectively correspond to the measuring air outlets of the plurality of measuring instruments.

[0013] As a preference, the installation cabinet is provided with an opening and closing door.

[0014] As a preference, the bottom of the installation cabinet is provided with a wheel set.

[0015] A method for measuring the air distribution ratio of an automotive air-conditioning air outlet, which uses the measuring device for measurement; the method includes the following steps:

[0016] S1: Measure and record the area S of each air outlet of the automotive air-conditioning to be measured;

[0017] S2: Connect each air outlet of the automotive air-conditioning to be measured to the measuring air inlet of a measuring instrument correspondingly;

[0018] S3: Operate the automotive air-conditioning to be measured with voltage U, detect the motor current A of the automotive air-conditioning to be measured, and the measuring instrument measures the air velocity V of each air outlet;

[0019] S4: Calculate the air pressure P according to the current A, calculate the measured air volume Q1 according to the air velocity V and the area S, and the calculation formula for the measured air volume Q1 is Q1 = S * 3600 * V + 5.9 * √P - 10.1409;

[0020] S5: Add the measured air volume Q1 calculated for each air outlet to obtain the total air volume Q, and compare the measured air volume Q1 calculated for each air outlet with the total air volume Q to obtain the air distribution ratio.

[0021] As an optimization, the measurement method further includes step S6. By changing the voltage U, repeat steps S3 - S6 to obtain the air distribution ratio of each air outlet of the automotive air conditioner to be measured operating at different voltages U.

[0022] As an optimization, the measurement method further includes step S7. By comparing the measured air volume Q1 calculated for each air outlet with the theoretical air volume Q0 of this air outlet, obtain the deviation value between the measured air volume Q1 and the theoretical air volume Q0, and judge the performance of each air outlet through the deviation value.

[0023] Generally speaking, the present invention has the following advantages:

[0024] The measurement device of the present invention simultaneously measures multiple air outlets of the automotive air conditioner through multiple measuring instruments, with high efficiency, solving the problem in the prior art that it takes a long time to complete the measurement of the air volume of multiple air outlets of the automotive air conditioner, and solving the problem that it is necessary to switch different air outlets one by one during the measurement of the air volume of multiple air outlets, which requires high experience for the measurement staff; in addition, the measurement device of the present invention can simultaneously measure multiple air outlets of the automotive air conditioner, thus avoiding the accumulation of errors in single air outlet measurement, and thus achieving accurate measurement of the air volume of multiple air outlets of the automotive air conditioner. Description of the Drawings

[0025] Figure 1 It is a three - dimensional view of a measurement device for the air distribution ratio of an automotive air conditioner outlet.

[0026] Figure 2 It is a three - dimensional view of another perspective of a measurement device for the air distribution ratio of an automotive air conditioner outlet.

[0027] Figure 3 It is a three - dimensional view of a measuring instrument connected to an air outlet.

[0028] Figure 4 It is a schematic diagram of the measuring instrument.

[0029] Figure 5 It is a flow chart of the measurement method.

[0030] Among them, 1 is the automotive air conditioner to be measured, 2 is the installation cabinet, 3 is the measurement air inlet, 4 is the connecting pipe, 5 is the connector, 6 is the outlet of the automotive air conditioner to be measured, 7 is the motor, 8 is the evacuation notch, 9 is the measuring instrument, T1 is the temperature and humidity sensor, P1 is the second pressure gauge, and P2 is the first pressure gauge. Detailed Embodiment

[0031] The present invention will be further described in detail below in conjunction with specific embodiments.

[0032] Embodiment 1

[0033] As Figures 1-4 shown, a measuring device for the air distribution ratio of an automotive air conditioner outlet provided in this embodiment includes a plurality of measuring instruments 9, and the plurality of measuring instruments are respectively connected to a plurality of automotive air conditioner outlets 6 to be measured; the measuring instrument includes a housing, a first pressure gauge P2, a second pressure gauge P1, a temperature and humidity sensor T1, and an anemometer. The housing is provided with a measuring air outlet and a measuring air inlet 3, and the measuring air inlet 3 is used to communicate with the automotive air conditioner outlet 6 to be measured; the first pressure gauge P2 is arranged at the measuring air inlet 3, the second pressure gauge P1 is arranged at the measuring air outlet, the temperature and humidity sensor T1 is arranged at the measuring air inlet 3, and the anemometer is arranged inside the housing to measure the air flow velocity flowing from the measuring air inlet to the measuring air outlet.

[0034] As Figure 1 shown, the number of measuring instruments in this embodiment is 16, and the number of automotive air conditioner outlets to be measured is 16. Among them, 4 measuring instruments are large air volume measuring instruments of 100 - 300 m 3 / H, 8 measuring instruments are medium air volume measuring instruments of 50 - 150 m 3 / H, and 4 measuring instruments are small air volume (air leakage volume) measuring instruments of 0 - 60 m 3 / H. By setting the measuring instruments into different specifications, different automotive air conditioner outlets to be measured can be made universal.

[0035] In this embodiment, compared with the prior art measuring device, the structure is simple and there is no need for structures such as a static pressure box and a fan; in the solution of this embodiment, the pressures at the measuring air inlet and the measuring air outlet are respectively detected by the first pressure gauge and the second pressure gauge, so as to obtain the pressures at these two positions. The temperature and humidity of the air at the measuring air inlet are detected by the temperature and humidity sensor to determine the air quality at the measuring air inlet. The air flow velocity flowing from the measuring air inlet to the measuring air outlet is measured by the anemometer. Thus, the actual air volume of the air outlet measured by the measuring instrument can be calculated according to the data obtained above. By synchronously measuring a plurality of air outlets of the automotive air conditioner with a plurality of measuring instruments, the measuring efficiency is improved, and the error accumulation caused by single air outlet measurement is avoided, so as to accurately measure the air volume of a plurality of air outlets of the automotive air conditioner.

[0036] As Figure 3As shown, in some embodiments, the measuring device further includes a connecting pipe 4 and a connector 5. One end of the connecting pipe 4 is sealingly connected to the measuring air inlet 3, and the other end of the connecting pipe 4 is connected to the connector 5, which is used to connect to the air outlet 6 of the automobile air conditioner to be measured. By providing the connecting pipe and the connector, in the actual use process, the measuring device is first placed in the automobile, and then the connector is connected to the air outlet of the automobile air conditioner, without having to carry the measuring device to the air outlet of the automobile air conditioner for connection measurement. Therefore, by providing the connecting pipe and the connector, the air outlets at any corner inside the automobile can be measured.

[0037] As Figures 1-2 shown, in some embodiments, the measuring device further includes an installation cabinet 2, and a plurality of measuring devices 9 are all arranged on the installation cabinet 2. By providing the installation cabinet, it is avoided that a plurality of measuring devices are scattered in the automobile.

[0038] As Figures 1-2 shown, in some embodiments, the installation cabinet is provided with a plurality of installation holes adapted to the measuring air inlets 6, and the measuring air inlets of the plurality of measuring devices are respectively assembled with the plurality of installation holes. By providing the installation holes, it is convenient to install the measuring device.

[0039] As Figures 1-2 shown, in some embodiments, the installation cabinet is provided with a plurality of evacuation notches 8, and the plurality of evacuation notches respectively correspond to the measuring air outlets of the plurality of measuring devices. By providing the evacuation notches, it is convenient for the air discharged from the measuring air outlets to be directly discharged to the outside, avoiding blockage at the housing and causing errors in the measurement results.

[0040] As Figures 1-2 shown, in some embodiments, the installation cabinet is provided with an opening and closing door. By providing the opening and closing door, it is convenient to assemble the measuring device and also convenient to repair the measuring device inside the installation cabinet.

[0041] In some embodiments, a wheel set is provided at the bottom of the installation cabinet. By providing the wheel set, it is convenient to carry the installation cabinet.

[0042] Embodiment 2

[0043] As Figure 5 shown, this embodiment provides a method for measuring the air distribution ratio of the air outlets of an automobile air conditioner, which is measured by using a measuring device; the method includes the following steps:

[0044] S1: Measure and record the area S of each air outlet of the automobile air conditioner to be measured;

[0045] S2: Connect each air outlet of the automobile air conditioner to be measured to the measuring air inlet of a measuring device correspondingly;

[0046] S3: Operate the automobile air conditioner to be measured with voltage U, detect the current A of the motor 7 of the automobile air conditioner to be measured, and the measuring device measures the wind speed V of each air outlet;

[0047] S4: Calculate the air pressure P based on the current A, calculate the measured air volume Q1 based on the wind speed V and the area S. The calculation formula for the measured air volume Q1 is Q1 = S * 3600 * V + 5.9 * √P - 10.1409;

[0048] Among them, 3600 is the time, which refers to 3600 seconds, representing the air volume per second. 5.9 and 10.1409 are constants, which are calculated through the static pressure difference ratio and the area S of the air outlet. The static pressure difference ratio is obtained by using a static pressure sensor to detect the static pressure values of the measured air inlet and the measured air outlet respectively, and then according to the cross-sectional areas of the measured air inlet and the measured air outlet and the gas state equation, it can be calculated.

[0049] S5: Add up the measured air volumes Q1 calculated for each air outlet to obtain the total air volume Q, and compare the measured air volume Q1 calculated for each air outlet with the total air volume Q to obtain the air distribution ratio.

[0050] In some embodiments, the measurement method further includes step S6. By changing the voltage U, repeat steps S3 - S6 to obtain the air distribution ratio of each air outlet of the automotive air conditioner to be tested operating at different voltages U.

[0051] In some embodiments, the measurement method further includes step S7. By comparing the measured air volume Q1 calculated for each air outlet with the theoretical air volume Q0 of that air outlet, obtain the deviation value between the measured air volume Q1 and the theoretical air volume Q0, and judge the performance of each air outlet through the deviation value.

[0052] Exemplarily, taking the actual measured air distribution ratio of a certain brand of automotive air conditioner as an example, please refer to Table 1 for details.

[0053] Table 1 Actual measured air distribution ratio data of a certain brand of automobile

[0054]

[0055]

[0056] As can be seen from Table 1, through the above method, the corresponding data of the voltage U, air pressure P, measured wind speed V, and current A are obtained. The air volume in Table 1 is the air volume calculated by the speed method, which is the measured wind speed V multiplied by the area S and then multiplied by the measurement time, that is, V * area S * 3600 seconds. Then, the measured air volume Q1 is calculated, the deviation value is obtained by comparing Q1 with the theoretical air volume Q0, and the air distribution ratio is obtained by comparing Q1 with the total air volume Q.

[0057] Taking another certain brand of automobile as an example, the voltage conditions in different modes are confirmed according to its specification parameters. The corresponding data obtained can be seen in Table 2.

[0058] Table 2 Voltages of a certain brand of automobile in different modes

[0059] Mode Voltage Mode Voltage Mode Voltage Mode Voltage Face Blowing 4.5±0.08 Full Cooling 0.46±0.08 Full Cooling 4.38±0.08 Face Blowing 1.05±0.08 Face and Foot Blowing 3.5±0.08 Full Heating 4.46±0.08 Full Heating 0.66±0.08 Face and Foot Blowing 1.4±0.08 Foot Blowing 2.2±0.08 Foot Blowing 2.0±0.08 Foot Blowing and Defrosting 1.5±0.08 Foot Blowing and Defrosting 1.4±0.08 Defrosting 0.46±0.08 Defrosting 1.05±0.08

[0060] According to the voltage data obtained above, use the measuring device of Embodiment 1 to measure, and obtain the following measured data. Specifically, please refer to Table 3.

[0061] Table 3 Comparison of Measured Air Volume and Theoretical Air Volume

[0062]

[0063]

[0064] As can be seen from the above examples, the measuring device and measuring method provided in this embodiment can accurately measure the air volume of each air outlet of the automotive air conditioner, and can carry out the measurement of the air distribution ratio of the air outlets in the cockpit to ensure the consistency of the measurement results with the vehicle performance.

[0065] The solution of this embodiment also has the following advantages: In recent years, the new energy vehicle industry has developed rapidly, but still faces many problems such as insufficient cruising range and frequent safety accidents. Compared with traditional fuel vehicles, the new energy vehicle industry has put forward more refined and strict requirements for the vehicle's thermal management system.

[0066] The thermal management system of new energy vehicles not only needs to balance the cooling and heating control of the vehicle interior temperature, but also needs to carry out more refined temperature management for the three electric devices (battery, motor, electronic control). With the increasing demand of passengers for comfort and safety, a multi-functional thermal management system will become the mainstream. Therefore, the thermal management system of new energy vehicles needs to solve key problems such as the refined thermal management of high-density batteries and motors / electronic controls, the improvement of comprehensive energy efficiency, and the improvement of occupant compartment comfort, so as to balance the vehicle safety target, power target, cruising range target, comfort target and durability target.

[0067] By using the measuring device and measuring method provided in this embodiment, it is possible to carry out test verification and evaluation on the thermal management technology of the automotive cockpit. The test evaluation results can provide a basis for the vehicle manufacturer to design and develop thermal management system products and technologies for rectification and optimization. Thus, it helps the enterprise to quickly enter the thermal management market and enhance the enterprise's influence.

[0068] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A measuring device for the air distribution ratio of an automotive air-conditioning air outlet, characterized in that: It includes multiple measuring devices, and the multiple measuring devices are respectively connected to multiple automotive air-conditioning air outlets to be measured; the measuring device includes a housing, a first pressure gauge, a second pressure gauge, a temperature and humidity sensor, and an anemometer. The housing is provided with a measuring air outlet and a measuring air inlet, and the measuring air inlet is used to communicate with the automotive air-conditioning air outlet to be measured; the first pressure gauge is arranged at the measuring air inlet, the second pressure gauge is arranged at the measuring air outlet, the temperature and humidity sensor is arranged at the measuring air inlet, and the anemometer is arranged inside the housing to measure the air flow velocity flowing from the measuring air inlet to the measuring air outlet.

2. The measuring device for the air distribution ratio of an automotive air-conditioning air outlet according to claim 1, characterized in that: The measuring device further includes a connecting pipe and a connector. One end of the connecting pipe is hermetically connected to the measuring air inlet, and the other end of the connecting pipe is connected to the connector, and the connector is used to connect to the automotive air-conditioning air outlet to be measured.

3. The measuring device for the air distribution ratio of an automotive air-conditioning air outlet according to claim 1, characterized in that: It further includes an installation cabinet, and multiple measuring devices are all arranged on the installation cabinet.

4. The measuring device for the air distribution ratio of an automotive air-conditioning air outlet according to claim 3, characterized in that: The installation cabinet is provided with multiple installation holes adapted to the measuring air inlets, and the measuring air inlets of the multiple measuring devices are respectively assembled with the multiple installation holes.

5. The measuring device for the air distribution ratio of an automotive air-conditioning air outlet according to claim 3, characterized in that: The installation cabinet is provided with multiple evacuation notches, and the multiple evacuation notches respectively correspond to the measuring air outlets of the multiple measuring devices.

6. The measuring device for the air distribution ratio of an automotive air-conditioning air outlet according to claim 3, characterized in that: The installation cabinet is provided with an opening and closing door.

7. The measuring device for the air distribution ratio of an automotive air-conditioning air outlet according to claim 3, characterized in that: The bottom of the installation cabinet is provided with a wheel set.

8. A method for measuring the air distribution ratio of an automotive air-conditioning air outlet, characterized in that, Measure using the measuring device according to any one of claims 1-7; the method includes the following steps: S1: Measure and record the area S of each air outlet of the automotive air-conditioning to be measured. S2: Connect each air outlet of the automotive air-conditioning to be measured to the measuring air inlet of a measuring device correspondingly. S3: Operate the automotive air-conditioning to be measured with voltage U, detect the motor current A of the automotive air-conditioning to be measured, and the measuring device measures the air velocity V of each air outlet. S4: Calculate the air pressure P according to the current A, calculate the measured air volume Q1 according to the air velocity V and the area S, and the calculation formula of the measured air volume Q1 is Q1 = S * 3600 * V + 5.9 * √P - 10.1409. S5: Add the measured air volumes Q1 calculated for each air outlet to obtain the total air volume Q, and compare the measured air volume Q1 calculated for each air outlet with the total air volume Q to obtain the air distribution ratio.

9. The method for measuring the air distribution ratio of an automotive air-conditioning air outlet according to claim 8, characterized in that: It further includes step S6, by changing the voltage U, repeating steps S3-S6, to obtain the air distribution ratio of each air outlet of the automotive air-conditioning to be measured operating at different voltages U.

10. The method for measuring the air distribution ratio of an automotive air-conditioning air outlet according to claim 8, characterized in that: It further includes step S7, by comparing the measured air volume Q1 calculated for each air outlet with the theoretical air volume Q0 of this air outlet, obtaining the deviation value between the measured air volume Q1 and the theoretical air volume Q0, and judging the performance of each air outlet through the deviation value.

Images