WO2011147163A1

WO2011147163A1 - Test device for detecting pollutant emission from vehicle

Info

Publication number: WO2011147163A1
Application number: PCT/CN2010/078586
Authority: WO
Inventors: 周昆兵; 宋庆元; 刘刚; 邹晓敏; 白平
Original assignee: 北汽福田汽车股份有限公司; 北京智科投资管理有限公司
Priority date: 2010-05-27
Filing date: 2010-11-10
Publication date: 2011-12-01
Also published as: CN102261997B; CN102261997A

Abstract

A test device for detecting pollutant emission from vehicle comprises a test chamber (1), a first air inlet pipe (5), a first blower (2), a heat exchanger (3), a pressure adjuster (4), and an air outlet pipe (6). The test chamber (1) is provided with an air intake (7) and an air vent (8). The first air inlet pipe (5), provided with a first air inlet valve (9), is connected to the air intake (7). The first blower (2) is connected to the first air inlet pipe (5). The heat exchanger (3) is located in the test chamber (1) which is connected to the pressure adjuster (4). The air outlet pipe (6), provided with an air outlet valve (10), is connected to the air vent (8).

Description

Test equipment for testing vehicle pollutant emissions

Technical field

The present invention relates to test equipment, and in particular to a test apparatus for testing vehicle pollutant emissions. Background technique

At present, after the vehicle is manufactured, it is usually necessary to carry out further vehicle pollutant emission tests on the vehicle. Vehicle pollutant emission tests usually include testing emissions tests for evaporative pollutants in vehicles and testing emissions testing for air pollutants in vehicles. Among them, the emission test of vehicle evaporative pollutants has higher requirements on the temperature, pressure and background concentration of the air in the test equipment (ie the concentration of the pollutant to be tested) and the sealing performance of the test equipment; The emission test has high requirements on the temperature, humidity and background concentration of the air in the test equipment and the flow speed of the air.

In the prior art, two separate devices are usually used for the emission test of the vehicle evaporative pollutants and the emission test of the air pollutants in the vehicle. Specifically, when it is required to perform a vehicle emission test for evaporative pollutants of the vehicle, the vehicle is placed in a corresponding device for testing; when the vehicle is required to perform a vehicle airborne pollutant emission test, the vehicle is placed Test in another corresponding device.

Due to the need to use two separate devices for the emission test of vehicle evaporative pollutants and the emission test of air pollutants in vehicles, the equipment investment is increased and the cost is increased. Summary of the invention

It is an object of the present invention to provide a test apparatus for testing the emission of pollutants from a vehicle that is capable of testing both the emission of evaporative pollutants from the vehicle and the emission of air pollutants from the interior of the vehicle. Embodiments of the present invention provide a test apparatus for testing pollutant emissions of a vehicle, wherein the test equipment includes a test chamber, a first intake pipe, a first air supply device, a heat exchange device, a pressure regulating device, and an air outlet pipe. Wherein: the test chamber has an air inlet and an air outlet; the first air inlet tube is connected to the air inlet, and the first air inlet tube is provided with a first air inlet valve; The device is coupled to the first intake pipe to adjust the temperature and humidity of the intake air; the heat exchange device is located in the test chamber; the pressure regulating device is coupled to the test chamber for adjusting the The pressure of the gas inside the test chamber; the air outlet pipe is connected to the air outlet, and an air outlet valve is disposed in the air outlet pipe.

When the test device for testing the pollutant emission of the vehicle provided by the embodiment of the present invention is used for the emission test of the vehicle evaporative pollutant, the first intake valve and the outlet valve are first opened, and the first air supply device is started, The first air supply device blows fresh air from the outside into the test chamber, replaces the gas in the test chamber, and activates the heat exchange device. At this time, the first air supply device only serves the air supply, and does not adjust the temperature and adjust the temperature. Wet action; analyze the background concentration of the gas in the test chamber by the analyzer, when the background concentration reaches the requirement, close the first air supply device, and close the first intake valve and the outlet valve; when the temperature of the air in the test chamber reaches When setting the value, open the door of the test chamber, put it into the vehicle to be tested, then close and seal the door of the test chamber; test the emission of evaporative pollutants from the vehicle, and open the pressure regulating device through the pressure regulating device. Control the pressure of the gas inside the test chamber, and throughout the test, the heat exchange device is in operation to control the test Air temperature in accordance with the change in the set temperature profile.

When the test equipment for testing vehicle pollutant emissions provided by the embodiment of the present invention is used to test the emission of air pollutants in the vehicle, the first intake valve and the outlet valve are first opened, and the first air supply device is started. The first air supply device controls the temperature, humidity and flow speed of the air sent to the test chamber and blows fresh air from the outside into the test chamber to replace the gas in the test chamber; when the temperature of the air in the test chamber is After the humidity and background concentration and the air flow rate meet the requirements, put them into the vehicle to be tested to test the emission of air pollutants in the vehicle, and During the whole test, the first intake valve and the outlet valve are both open, and the first air supply device is always in operation, so that air can flow in through the first intake pipe and flow out through the air outlet pipe to make the test cabin The air is in circulation and the heat exchange device and the pressure regulating device are not working.

It can be seen that the test equipment for testing vehicle pollutant emissions provided by the embodiments of the present invention can be used for the emission test of the vehicle evaporative pollutants and the emission test of the air pollutants in the vehicle, so that equipment investment can be reduced and the cost can be reduced. DRAWINGS

1 is a schematic structural view of an embodiment of a test apparatus for testing pollutant emissions of a vehicle provided by the present invention;

Fig. 2 is a schematic structural view showing another embodiment of a test apparatus for testing pollutant emissions of a vehicle provided by the present invention. Description of the reference numerals

1: test chamber; 2: first air supply device; 3: heat exchange device; 4: pressure regulating device; 5: first intake pipe; 6: air outlet pipe; 7: air inlet; 8: air outlet; First intake valve; 10: outlet valve; 11: personnel access door; 12: second intake pipe; 13: second intake valve; 14: second air supply device; 15: first air bag; Second air bag; 17: first valve; 18: second valve; 19: protective case; 20: support plate; 21: vent hole; 22: intake valve; 23: filter. detailed description

As shown in FIG. 1 , an embodiment of the present invention provides a test apparatus for testing pollutant emissions of a vehicle, wherein the test equipment includes a test chamber 1, a first intake pipe 5, a first air supply device 2, and a heat exchange. The device 3, the pressure regulating device 4 and the air outlet pipe 6, wherein: the test chamber 1 has an air inlet 7 and an air outlet 8; the first air inlet pipe 5 is connected to the air inlet 7, and the first Intake pipe 5 a first intake valve 9 is provided; the first air supply device 2 is connected to the first intake pipe 5, and can adjust the temperature and humidity of the intake air; the heat exchange device 3 is located in the test chamber 1 The pressure regulating device 4 is connected to the test chamber 1 for adjusting the pressure of the gas inside the test chamber 1; the air outlet tube 6 is connected to the air outlet 8 and the air outlet tube 6 is disposed There is an outlet valve 10.

When the test equipment for testing the pollutant emission of the vehicle provided by the embodiment of the present invention is used to perform the emission test of the vehicle evaporative pollutant, the first intake valve 9 and the outlet valve 10 are first opened, and the first air supply device 2 is opened. Starting, the fresh air from the outside is blown into the test chamber 1 through the first air blowing device 2, the gas in the test chamber 1 is replaced, and the heat exchange device 3 is activated, at which time the first air supply device 2 only serves air. The function is not to adjust the temperature and humidity; the background concentration of the gas in the test chamber 1 is analyzed by the analyzer, and when the background concentration reaches the requirement, the first air supply device 2 is closed, and the first intake valve 9 and the air outlet are simultaneously Valve 10 is closed; when the temperature of the air in test chamber 1 reaches the set value, the door of test chamber 1 is opened, placed in the vehicle to be tested, and then the door of test chamber 1 is closed and sealed; The test is carried out, and the pressure regulating device 4 is turned on at the same time, and the pressure of the gas inside the test chamber 1 is controlled by the pressure regulating device 4, and during the whole test, the heat exchange device is installed. 3 are in working condition, to control the air temperature curve according to the set 1 in the test chamber.

When the test device for testing the pollutant emission of the vehicle provided by the embodiment of the present invention is used to test the emission of air pollutants in the vehicle, the first intake valve 9 and the outlet valve 10 are first opened, and the first air supply is provided. The device 2 is activated, and the temperature, humidity and flow velocity of the air sent to the test chamber 1 are controlled by the first air blowing device 2, and fresh air from the outside is blown into the test chamber 1 to replace the gas in the test chamber 1; When the temperature, humidity and background concentration of the air in the test chamber 1 and the air flow rate meet the requirements, put them into the vehicle to be tested, test the emission of air pollutants in the vehicle, and during the whole test, the first Both the gas valve 9 and the outlet valve 10 are open, and the first air supply device 2 is directly in operation, so that air can pass through the first intake air. The tube 5 flows in, and flows out through the gas outlet pipe 6, so that the air in the test chamber 1 is in a flow state, and the heat exchange device 3 and the pressure regulating device 4 do not operate.

It can be seen that the test equipment for testing vehicle pollutant emissions provided by the embodiments of the present invention can be used for the emission test of the vehicle evaporative pollutants and the emission test of the air pollutants in the vehicle, so that equipment investment can be reduced and the cost can be reduced.

The test chamber 1 can be a conventional cabin. The sheet of the test chamber 1 may be a heat insulating plate, thereby reducing heat exchange inside and outside the test chamber 1 and better controlling the temperature inside the test chamber 1. It should be noted that no adsorbent (such as activated carbon) is placed in the test chamber 1 to enable emission testing of vehicle evaporative pollutants and emission testing of air pollutants in vehicles. In the existing test chambers for vehicle air pollutant emission testing, adsorbents are placed to absorb the air pollutants to be tested in the test cabin, so that the background concentration in the test chamber can be more in line with the requirements.

In order to enable sufficient air flow in the test chamber 1 during the emission test of the air pollutants in the vehicle, preferably, the air inlet 7 is located at an upper portion of the test chamber 1, and the air outlet 8 is located at the The lower portion of the test chamber 1 is located at an oblique diagonal position of the air inlet 7. Specifically, since the intake port 7 and the air outlet 8 are arranged diagonally diagonally, the gas entering the test chamber 1 from the air inlet 7 can be sufficiently diffused in the test chamber 1 and then discharged through the air outlet 8 It is outside the test chamber 1, so that the air in the test chamber 1 can flow more fully, and the background concentration in the test chamber 1 is more effectively reduced.

Generally, the test cabin 1 is provided with a vehicle access door (not shown) and a personnel access door 11 , and a first sealing strip (not shown) is disposed around the vehicle entrance and exit door, and the person entering and leaving the door 11 is provided with a first A sealing strip (not shown) to facilitate access to the test chamber 1 by the vehicle and personnel to be tested. The first sealing strip and the second sealing strip may suitably adopt various sealing strips known in the art. For example, the first sealing strip may adopt an inflatable silicone strip, and the second sealing strip may adopt a solid rubber strip. . Specifically, the vehicle to be tested can enter the test cabin 1 through the vehicle entrance and exit doors. The test can be carried out by the staff member entering and exiting the door 11 through the personnel entering and exiting the test chamber 1 before and after the test. Wherein, after the vehicle entrance and exit door is closed, by injecting gas into the inflatable silicone strip, the gap between the vehicle entrance and exit door and the test chamber 1 can be sealed by the inflatable silicone strip; after the personnel access door 11 is closed, the passage can be passed. A solid rubber strip provided around the person entering and leaving the door 11 seals the gap between the person entering and leaving the door 11 and the test chamber 1.

The first air blowing device 2 may employ various air blowing devices known in the art capable of adjusting the temperature and humidity of the intake air, such as an air conditioner or a fan capable of adjusting the temperature and humidity of the intake air.

The heat exchange device 3 is used to control the temperature of the gas in the test chamber 1 to meet the temperature requirements of the emission test of the vehicle's evaporative pollutants. The heat exchange device 3 may employ various heat exchange devices known in the art, such as an air conditioner or a fan capable of heating and cooling. The heat exchange device 3 can be placed in the test chamber 1 or can be fixed to the side wall of the test chamber 1 in a conventional manner.

The pressure regulating device 4 is connected to the test chamber 1 for adjusting the pressure inside the test chamber 1 to meet the pressure requirement of the vehicle emission test for evaporating pollutants. The pressure regulating device 4 can adopt various appropriate structures known in the art as long as the pressure inside the test chamber 1 can be adjusted. For example, the pressure regulating device 4 may include a first air bag 15, a first air extracting device (not shown), a second air bag 16 and a second air extracting device (not shown), wherein: the first air bag 15 is located The test chamber 1 is connected to and connected to the test chamber 1 , and the first air suction device is connected to the first air bag 15 for evacuating the gas in the first air bag 15 . Between the first air bag 15 and the test chamber 1 is provided a first valve 17; the second air bag 16 is located inside the test chamber 1, connected to the test chamber 1, and the test The second air bag 16 is connected to the second air bag 16 for evacuating the gas in the second air bag 16, the second air bag 16 and the test chamber 1 A second valve 18 is disposed between the exterior portions. The first and second air extracting devices may employ various air extracting devices known in the art, such as wind. In order to stably support the first air bag 15, the first air bag 15 is preferably located on the top wall of the test chamber 1 and is connected and communicated with the top wall of the test chamber 1.

In order to protect the first air bag 15 from being damaged by the debris, as shown in FIG. 2, preferably, the pressure regulating device 4 further includes a protective casing 19, and the protective casing 19 is covered by The first air bag 15 is fixedly connected to the test chamber 1. The protective casing 19 can be fixedly connected to the test chamber 1 in various suitable manners, such as welding or fastening.

In order to support the second air bag 16 stably, the pressure regulating device 4 further includes a support plate 20, and the upper part of the support plate 20 is fixedly connected to the test chamber 1 in an upper portion of the test chamber 1. And the support plate 20 has a vent hole 21, and the second air bag 16 is located on the support plate 20. The support plate 20 can be fixedly coupled to the test chamber 1 in any suitable manner, such as by welding or by a fastening connection. In order to enable uniform flow of air in the test chamber 1, preferably, the vent holes 21 are plural and evenly distributed on the support plate 20.

When the pressure of the gas in the test chamber 1 is adjusted by using the above-mentioned pressure regulating device 4, first, before the start of the test, the first valve 17 and the second valve 18 are opened, and the first air blowing device and the second air exhaust device are respectively used. The gas in the air bag 15 and the second air bag 16 is evacuated, and after evacuation, the first valve 17 and the second valve 18 are closed. During the test, the first valve 17 and the second valve 18 are opened, and the first and second air extractors are inoperative, utilizing the natural flow of air to achieve pressure balance. Gp, when the temperature in the test chamber 1 rises, the gas in the test chamber 1 expands, and the pressure is inevitably increased, at which time the gas in the test chamber 1 diffuses into the first air bag 15, thereby being in the test chamber 1 The gas pressure is adjusted; when the temperature in the test chamber 1 is lowered, the gas in the test chamber 1 contracts, the pressure drops, and the outside air enters the second air bag 16 at this time, and the second air bag 16 is inflated and swelled up. This is equivalent to occupying the volume of the test chamber 1, and the volume in the test chamber 1 is reduced, thereby increasing the air pressure in the test chamber 1, thereby adjusting the gas pressure in the test chamber 1.

Since the outside air is continuously fed into the test chamber 1 through the first air blowing device 2 when the air pollutant emission test of the vehicle is carried out, the gas in the test chamber 1 is in circulation. In order to prevent the air pollutants to be tested from being contained in the intake air, the air pollutants to be tested contained in the air intake are effectively removed, so that the background concentration in the test chamber 1 meets the requirements. Preferably, the embodiment of the present invention provides The test apparatus for testing vehicle pollutant emissions further includes a filter 23 having one end connected to the first air supply device 2 and the other end of the filter 23 connected to the first intake pipe 5 . The filter 23 may employ various filters known in the art that are capable of removing air contaminants to be tested, such as activated carbon filters. Thus, the gas fed through the first air blowing means 2 first flows through the filter 23 and then enters the test chamber 1 through the first intake pipe 5.

In order to facilitate operation and save energy consumption, as shown in FIG. 2, according to a preferred embodiment of the present invention, the test apparatus for testing vehicle pollutant emissions provided by the present invention further includes a second intake pipe 12 and a second delivery a wind inlet device 14 , the second intake pipe 12 is connected to the first intake pipe 5 and disposed inside the first intake valve 9 , and the second intake pipe 12 is provided with a second intake valve 13 The second air blowing device 14 is connected to the second air inlet pipe 12. In this way, when performing the emission test of the evaporative pollutants of the vehicle, the first intake valve 9 can be closed, and the second intake valve 13 can be opened, and the air that does not need to be tempered and conditioned can be sent through the second air supply device 14. , which makes it easy to operate and saves energy consumption. The second air blowing device 14 may be a conventional air blowing device such as a fan or a fan. The above "inside" refers to the side close to the test chamber 1.

In order to quickly control the on and off between the test chamber 1 and the first intake pipe 5 and the second intake pipe 12, according to a preferred embodiment of the present invention, the intake port 7 and the first intake valve 9 An intake total valve 22 is provided between the second intake valve 13 and the second intake valve 13. Thus, in the event of an emergency, the connection between the test chamber 1 and the external device can be quickly cut off by closing the intake manifold valve 22.

For the convenience of operation, and the automatic control of each device and component is possible, preferably, the test device for testing vehicle pollutant emission provided by the embodiment of the invention further comprises a control unit (not shown), the control unit is used for controlling the The first air blowing device 2, the heat exchange device 3, the pressure regulating device 4, the first intake valve 9, the air outlet valve 10, the vehicle entrance and exit door, the second intake valve 13, and the second air supply device The action of the 14 and the intake manifold valve 22 is operated such that they operate in accordance with the set program. The specific composition of the control unit is well known to those skilled in the art and will not be described herein.

The other components of the test apparatus for testing vehicle pollutant emissions provided by the present invention (for example, the first intake pipe 5, the second intake pipe 12, the outlet pipe 6, and the respective valves) are of a conventional structure, which is a field It is well known to the skilled person and will not be described here. The manner of connection between the first intake pipe 5, the second intake pipe 12, and the outlet pipe 6 and the respective valves and the respective devices is well known to those skilled in the art and will not be described herein.

The operation of the test apparatus for testing vehicle pollutant emissions provided by the above specific embodiments will be described below with reference to the accompanying drawings.

As shown in FIG. 2, when the test equipment for testing vehicle pollutant discharge provided by the embodiment of the present invention is used to perform the emission test of the vehicle evaporative pollutants, the control unit is first operated, and the second intake valve 13 and the outlet valve 10 are operated. And the intake air main valve 22 is opened, and the second air blowing device 14 is activated, and the outside fresh air is blown into the test chamber 1 through the second air blowing device 14, so that the gas in the test chamber 1 is replaced, and the heat is started at the same time. The switching device 3; analyzes the background concentration of the gas in the test chamber 1 by the analyzer, and when the background concentration reaches the requirement, operates the control unit to close the first air supply device 2, and simultaneously closes the second intake valve 13 and the outlet valve 10. Activating the first air extracting device and the second air extracting device to evacuate the gas in the first air bag 15 and the second air bag 16, and after evacuating, the first air blowing device and the second air extracting device stop working, the first valve 17 and the first The second valve 18 is closed; when the temperature of the air in the test chamber 1 reaches the set value, the vehicle of the test cabin 1 is opened and closed, placed in the vehicle to be tested, and then the vehicle of the test cabin 1 is moved in and out of the door. Close, operate the control unit, inflate the inflatable silicone strip of the vehicle into and out of the door, thereby sealing the gap between the vehicle entrance and exit door and the test chamber 1; testing the emission of the vehicle's evaporative pollutants, operating the control unit, A valve 17 and a second valve 18 are opened, the first air extracting device and the second air extracting device are inoperative, the pressure is balanced by the natural flow of air, and the heat exchange device 3 is in operation throughout the test to control The air temperature in the test chamber 1 changes according to a set temperature profile. When the test equipment for testing vehicle pollutant emissions provided by the embodiment of the present invention is used to test the emission of air pollutants in the vehicle, the control unit is first operated to connect the first intake valve 9, the outlet valve 10, and the intake air. The valve 22 is opened, and the first air blowing device 2 is activated, and the temperature, humidity, and flow velocity of the air sent to the test chamber 1 are controlled by the first air blowing device 2, and the outside fresh air is blown into the test through the filter 23. In the cabin 1, the gas in the test chamber 1 is replaced; when the temperature, humidity and background concentration of the air in the test chamber 1 and the flow speed of the air reach the requirements, the vehicle to be tested is placed, and the air pollutants in the vehicle interior are The discharge is tested, and during the entire test, the first intake valve 9 and the outlet valve 10 are both open, and the first air supply device 2 is directly in operation, so that air can flow in through the first intake pipe 5. On the other hand, the air in the test chamber 1 is in a flow state by the outflow pipe 6, and the heat exchange device 3 and the pressure regulating device 4 are not operated.

It should be noted that each of the specific technical features described in the above specific embodiments may be combined in any suitable manner, and it is also within the scope of the present disclosure. In addition, any combination of various embodiments of the present invention may be made as long as it does not deviate from the idea of the present invention, and it should be regarded as the disclosure of the present invention.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments, and various simple modifications of the technical solutions of the present invention may be made within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.

Claims

Claim

A test apparatus for testing pollutant emissions of a vehicle, characterized in that the test equipment comprises a test chamber (1), a first intake duct (5), a first air supply device (2), and a heat exchange device ( 3), a pressure regulating device (4) and an air outlet pipe (6), wherein: the test chamber (1) has an air inlet (7) and an air outlet (8); the first air inlet pipe (5) The intake port (7) is connected, and the first intake pipe (5) is provided with a first intake valve (9); the first air supply device (2) and the first intake pipe (5) a connection capable of regulating the temperature and humidity of the intake air; the heat exchange device (3) being located in the test chamber (1); the pressure regulating device (4) being connected to the test chamber (1), The pressure for adjusting the internal gas of the test chamber (1); the air outlet pipe (6) is connected to the air outlet (8), and the air outlet pipe (6) is provided with an air outlet valve (10).

2. The test apparatus according to claim 1, wherein the air inlet (7) is located at an upper portion of the test chamber (1), and the air outlet (8) is located at a lower portion of the test chamber (1) And located at the diagonally opposite position of the air inlet (7).

3. The testing device according to claim 1, wherein the test chamber (1) is provided with a vehicle access door and a personnel access door (11), and a first sealing strip is disposed around the vehicle access door, the person A second sealing strip is provided around the entrance and exit door (11).

The test apparatus according to claim 1, wherein the first air blowing device (2) is an air conditioner or a fan capable of adjusting the temperature and humidity of the intake air.

5. The testing device according to claim 1, wherein the heat exchange device (3) is empty

6. The testing device according to claim 1, wherein the pressure regulating device (4) comprises a first air bag (15), a first air extracting device, a second air bag (16) and a second air extracting device, wherein : the first air bag (15) is located outside the test chamber (1), connected to and connected to the test chamber (1), and the first air suction device is connected to the first air bag (15) , for using the first air bag

The gas in (15) is evacuated, a first valve (17) is disposed between the first air bag (15) and the test chamber (1); and the second air bag (16) is located in the test chamber The inside of (1) is connected to the test chamber (1) and communicates with the outside of the test chamber (1), and the second air extracting device is connected to the second air bag (16) for The gas in the second air bag (16) is evacuated, and a second valve (18) is disposed between the second air bag (16) and the outside of the test chamber (1).

7. The testing device according to claim 6, wherein the first air bag (15) is located on a top wall of the test chamber (1) and is connected to and connected to a top wall of the test chamber (1). The pressure regulating device (4) further comprises a protective casing (19) covering the first air bag (15) and fixedly connected to the test chamber (1).

8. The testing device according to claim 6, wherein the pressure regulating device (4) further comprises a support plate (20) located at an upper portion of the test chamber (1) and the Test cabin

(1) A fixed connection, and the support plate (20) has a vent hole (21), and the second air bag (16) is located on the support plate (20).

9. The testing device according to claim 1, wherein the testing device further comprises a filter (23), one end of the filter (23) being connected to the first air blowing device (2), the filter ( The other end of 23) is connected to the first intake pipe (5).

10. The test apparatus according to claim 9, wherein the filter (23) is active Carbon filter.

11. The testing apparatus according to claim 1, wherein the testing apparatus further comprises a second intake pipe (12) and a second air supply device (14), the second intake pipe (12) and the first An intake pipe (5) is connected and disposed inside the first intake valve (9), and a second intake valve (13) is disposed in the second intake pipe (12), the second air supply device (14) is connected to the second intake pipe (12).

The test apparatus according to claim 11, wherein the second air blowing device (14) is a fan or a fan.