阅读说明：本技术 一种汽车空调出风口的气密性测试装置 (A kind of test device for air tightness of vehicle air conditioning outlet ) 是由 叶立纯 许亚 胡刚 胡顾城 祝益龙 张坤 于 2019-08-19 设计创作，主要内容包括：本发明涉及一种汽车空调出风口的气密性测试装置,包括工作台,所述的工作台的上端安装有出风口定位台,所述的工作台的内部下侧安装有风机,所述的风机通过风管与出风口定位台内的通风孔相连通,所述的风管上的任意位置安装有流量传感器,还包括与通风孔或者风管相连通的气压传感器,所述的工作台的上端安装有控制箱,所述的控制箱的内部设置有与流量传感器以及气压传感器相连的PLC控制器,所述的PLC控制器与PWM发生器相连,PWM发生器控制风机运行。本发明结构简单,在测试过程中可以保持出风口内部的压差稳定,测试结果简单直观,具有很好的通用性。(The present invention relates to a kind of test device for air tightness of vehicle air conditioning outlet, including workbench, the upper end of the workbench is equipped with air outlet positioning table, the inner lower of the workbench is equipped with blower, the blower is connected by air hose with the ventilation hole in air outlet positioning table, any position on the air hose is equipped with flow sensor, it further include the baroceptor being connected with ventilation hole or air hose, the upper end of the workbench is equipped with control cabinet, the control cabinet is internally provided with the PLC controller being connected with flow sensor and baroceptor, the PLC controller is connected with PWM generator, PWM generator controls fan operation.The configuration of the present invention is simple, can keep the pressure difference inside air outlet to stablize during the test, and test result simple, intuitive has good versatility.)

1. a kind of test device for air tightness of vehicle air conditioning outlet, including workbench (1), which is characterized in that the work The upper end of platform (1) is equipped with air outlet positioning table (2), and the inner lower of the workbench (1) is equipped with blower (9), described Blower (9) be connected with the ventilation hole (4) in air outlet positioning table (2) by air hose (8), times on the air hose (8) Meaning position is equipped with flow sensor (7), further includes the baroceptor (11) being connected with ventilation hole (4) or air hose (8), The upper end of the workbench (1) is equipped with control cabinet (3), the control cabinet (3) be internally provided with and flow sensor (7) and the connected PLC controller of baroceptor (11), the PLC controller are connected with PWM generator, PWM generator Control blower (9) operation.

2. the test device for air tightness of vehicle air conditioning outlet according to claim 1, it is characterised in that: the air hose (8) any position on disconnects, and passes through the flow sensor (7) axially arranged in gap and is connected.

3. the test device for air tightness of vehicle air conditioning outlet according to claim 1, it is characterised in that: the air pressure Sensor (11) is connected by connecting tube (12) with ventilation hole (4).

4. the test device for air tightness of vehicle air conditioning outlet according to claim 1, it is characterised in that: the outlet air The upper end of mouth positioning table (2) is equipped with dismountable air outlet posting (5).

5. the test device for air tightness of vehicle air conditioning outlet according to claim 1, it is characterised in that: the blower (9) it is mounted on the upper end of seal box (10) and opening is passed into seal box (10), one end of the air hose (8) and seal box (10) upper end is connected.

6. the test device for air tightness of vehicle air conditioning outlet according to claim 1, it is characterised in that: the ventilation The position that the lower end in hole (4) is connected with air hose (8) is provided with porous plate (6).

Technical field

The present invention relates to vehicle air conditioning outlet detection fields, more particularly to a kind of air-tightness of vehicle air conditioning outlet Test device.

Background technique

With the development of the automobile industry, can be more fine and professional for the examination criteria of various auto parts and components, such as Automotive air outlet is the component that will be used in every trolley, and present each car manufacturer wants the air-tightness of automotive air outlet It is also higher and higher for asking, and test index primarily now is that have its environment at 23 DEG C ± 2 DEG C of the air outlet of air door cutting structure At a temperature of to air outlet inside apply 250Pa pressure difference, air leakage rate is no more than 60L/min, for being cut by blade Then the index but also has noise and requires the air outlet of disconnected air no more than 240L/min.

This higher requirement that just present test device for air tightness is proposed, air outlet airtightness inspection currently on the market Surveying device is quantitatively passed into air hose using external gas source, and certain flow is arrived in setting, is then tested in air outlet The pressure difference in portion looks at whether pressure difference is up to standard, but its amount of leakage is different due to different air outlets, and external gas source is passed through Amount be constant, the control of gas source is difficult to grasp so to reach certain amount of leakage.

Reliable mode is control standard pressure difference, then the test volume in sensed flow meter, and similar method is in sky Adjusting in the leakage test of air hose has application, but does not apply in the air tightness test of air outlet, and practical operation It is a problem that the constant of air outlet inside and outside differential pressure how is kept in journey.

Summary of the invention

Technical problem to be solved by the invention is to provide a kind of test device for air tightness of vehicle air conditioning outlet, structures Simply, the pressure difference inside air outlet can be kept to stablize during the test, test result simple, intuitive has general well Property.

The technical solution adopted by the present invention to solve the technical problems is: providing a kind of air-tightness of vehicle air conditioning outlet Test device, including workbench, the upper end of the workbench are equipped with air outlet positioning table, the interior subordinate of the workbench Side is equipped with blower, and the blower is connected by air hose with the ventilation hole in air outlet positioning table, on the air hose Any position is equipped with flow sensor, further includes the baroceptor being connected with ventilation hole or air hose, the work The upper end of platform is equipped with control cabinet, what being internally provided with of the control cabinet was connected with flow sensor and baroceptor PLC controller, the PLC controller are connected with PWM generator, and PWM generator controls fan operation.

Further, any position on the air hose disconnects, and passes through the flow sensor axially arranged in gap It is connected.

Further, the baroceptor is connected by connecting tube with ventilation hole.

Further, the upper end of the air outlet positioning table is equipped with dismountable air outlet posting.

Further, the assembling seal box upper end and opening be passed into seal box, the air hose One end be connected with the upper end of seal box.

Further, the position that the lower end of the ventilation hole is connected with air hose is provided with porous plate.

The utility model has the advantages that structure is simple the present invention relates to a kind of test device for air tightness of vehicle air conditioning outlet, it can be certainly Dynamic control keeps the constant of air outlet inner and outer air pressure, and further guarantees the standard of detection by setting seal box and porous plate True property can support the air tightness test of a variety of air outlet assemblies, have good promotional value.

Detailed description of the invention

Fig. 1 is three-dimensional structure diagram of the invention；

Fig. 2 is the half-sectional structure chart of main view of the invention；

Fig. 3 is internal structure stereoscopic schematic diagram of the invention；

Fig. 4 is the half-sectional structure chart of internal structure side view of the invention；

Fig. 5 is system control block figure of the invention.

Diagram: 1. workbench；2. air outlet positioning table；3. control cabinet；4. ventilation hole；5, air outlet posting；6, porous Plate；7, flow sensor；8, air hose；9, blower；10, seal box；11, baroceptor；12, connecting tube.

Specific embodiment

Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited Range.

As shown in Figs. 1-5, embodiments of the present invention are related to a kind of test device for air tightness of vehicle air conditioning outlet, packet Workbench 1 is included, the upper end of the workbench 1 is equipped with air outlet positioning table 2, the inner lower installation of the workbench 1 There is blower 9, the blower 9 is connected by air hose 8 with the ventilation hole 4 in air outlet positioning table 2, on the air hose 8 Any position is equipped with flow sensor 7, further includes the baroceptor 11 being connected with ventilation hole 4 or air hose 8, described The upper end of workbench 1 is equipped with control cabinet 3, and the control cabinet 3 is internally provided with and flow sensor 7 and air pressure sensing The connected PLC controller of device 11, the PLC controller are connected with PWM generator, and PWM generator controls blower 9 and runs.

As a kind of embodiment of the present patent application, when in use, the air outlet detected placement will be needed to be fixed on 2 upper end of air outlet positioning table, as shown in figure 5, given pressure difference is arranged by PLC controller, as air outlet inside and outside differential pressure is 250Pa, PLC controller control PWM generator and issue the signal control work of blower 9, and wind pressure enters air outlet by air hose 8 In, and air outlet inside and outside differential pressure is made to reach given value, flow sensor 7 can measure the throughput by it, because there is leakage Just have air-flow process, this throughput is exactly the amount of leakage of air outlet, directly judge throughput qualification it is unqualified can, And the time entirely tested be it is shorter, usually 10 seconds, baroceptor 11 can measure air outlet always in this 10 seconds Inside and outside differential pressure, and control blower 9 and keep this pressure difference.

During the test, it to keep quite, the leakage noise to air outlet is needed to test, this test can be with Using decibel instrument, can also be listened with the direct ear of operator.

In the testing standard of automobile production enterprise, also have one be adjust the distance air outlet assembly 100mm position carry out The test request of the speed of air leakage, and the air outlet positioning table 2 of this patent is open, so in air-leakage test When position apart from air outlet assembly 100mm can be placed on flow sensor, the speed of measurement air leakage is very square Just.

Wherein the setting value of air outlet inside and outside differential pressure can be adjusted according to different requirements, range 0-2000Pa, And the test scope of flow is 5~500L/min, substantially can satisfy the testing standard of air outlets all in the market

In order to facilitate flow sensor 7 installation and improve measurement accuracy, any position on the air hose 8 disconnects, Pass through the flow sensor 7 axially arranged in gap to be connected, air-flows all in this way can all enter flow sensor 7, protect The accuracy of measurement is demonstrate,proved, the position of flow sensor 7 can be adjusted according to the actual situation.

The baroceptor 11 is connected by connecting tube 12 with ventilation hole 4, makes the peace of baroceptor 11 in this way Dress is more flexible, and be connected with ventilation hole 4 keeps the detection of baroceptor 11 more accurate closer to air outlet.

In order to facilitate the quick positioning of air outlet assembly, the upper end of the air outlet positioning table 2 is equipped with removably Air outlet posting 5, the size of air outlet posting 5 and the bottom size of air outlet assembly match, different air outlet assemblies Different air outlet postings 5 is just needed replacing, and air outlet assembly can be by two after being located in 5 inside of air outlet posting The lock-screw of side is attached with air outlet posting 5, very convenient.

The blower 9 is mounted on the upper end of seal box 10 and opening is passed into seal box 10, and the one of the air hose 8 End is connected with the upper end of seal box 10, and it is that air hose 8 is directly connected with blower 9 and makes wind that 10 technical problems to be solved of seal box, which are arranged, Airflow fluctuation in pipe 8 is bigger, and the detection of flow sensor 7 and baroceptor 11 is caused unstable inaccurate ask occur Topic, and seal box 10, which is arranged, can buffer the air-flow of blower 9 out, and stably enter in air hose 8, pass flow The flow that sensor 7 detects is not in bigger fluctuation, and detection is more accurate.

The position that the lower end of the ventilation hole 4 is connected with air hose 8 is provided with porous plate 6, and the main function of porous plate 6 is Keep the air-flow for entering ventilation hole 4 more uniform, it is not easy to generate the noise uttered long and high-pitched sounds in ventilation hole 4, influence the inspection of noise It surveys.

The configuration of the present invention is simple can keep the pressure difference inside air outlet to stablize during the test, and test result is simple Intuitively, there is good versatility.