Testing device and system for ventilation quantity of whole vehicle and testing method for ventilation quantity of whole vehicle

Abstract

The invention provides a whole-vehicle ventilation quantity testing device and system and a whole-vehicle ventilation quantity testing method, and relates to the field of vehicles. The testing device utilizes an air volume collecting device to carry out air transmission between an air volume table and a cabin of a tested vehicle, so that the air volume table can test the air flow of the cabin space; a direct-current power supply function is provided for a tested vehicle through a power supply interface of the air volume table and an air blower power supply system, a function of testing air blower current is realized through a current acquisition interface of the air volume table and the air blower power supply system, and a function of testing vehicle cabin static pressure is realized through a static pressure acquisition interface of the air volume table and a static pressure transmission device. According to the testing method, the total air volume and the air leakage amount when the air conditioning system works in any mode can be measured through the testing equipment, so that the actual ventilation amount of the air conditioning system in any mode is accurate, a tool does not need to be arranged for each ventilation opening, and the testing equipment is more convenient to use and higher in testing efficiency. And the air volume of the whole vehicle can be obtained more quickly.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a whole-vehicle ventilation volume testing device, system and whole-vehicle ventilation volume testing method. Background Art

[0002] The vehicle air volume test is an important parameter in the study of vehicle thermal comfort, defrosting and defogging performance, and NVH performance of the air conditioning system. It can be specifically divided into the vehicle air volume when the vehicle air conditioning system is set in any air outlet mode, internal and external circulation mode, or mixed mode. Quickly, conveniently and accurately testing the air volume is of great significance to the research in various related fields.

[0003] The external circulation air volume is currently mainly measured indirectly through the whole vehicle PQ curve method, which is mature, reliable and convenient. The internal circulation air volume is the difficulty of air volume testing. At present, it is mainly done by making corresponding tooling for each air outlet, testing the air volume of each air outlet separately in the internal circulation mode, and then adding them up. However, this method requires the production of tooling for each air outlet of each tested sample vehicle. The tooling production cost is high and the cycle is long; the air volume of each air outlet must be tested separately, and the testing process is cumbersome. Moreover, after a certain air outlet is connected to the test tooling, the flow field near the air outlet will change, which may affect the test accuracy. And usually the air volume of each air outlet is low, and the error is large when tested separately. The error of each air outlet test will be accumulated during the air volume addition process, resulting in a large error in the final measurement result, which cannot meet the needs of certain high-precision test scenarios.

[0004] Therefore, how to conveniently and accurately complete the test of the vehicle's air volume under any air-conditioning mode has become an urgent problem to be solved. Summary of the invention

[0005] Based on this, it is necessary to provide a whole-vehicle ventilation volume test equipment, system and whole-vehicle ventilation volume test method to address the above-mentioned technical problems, so as to conveniently and accurately complete the test of the whole-vehicle air volume under any air-conditioning mode.

[0006] A test device for the ventilation volume of a whole vehicle, comprising: an air volume table, a blower power supply system, an air volume collection device and a static pressure transmission device; the air volume table comprises an air inlet, an air outlet, a power supply interface, a current collection interface, and a static pressure collection interface; the air inlet is connected to the cabin space of a tested vehicle through the air volume collection device; the power supply interface is connected to the power supply end of the blower power supply system, the current collection interface is connected to the current collection end of the blower power supply system, and the power supply end of the blower power supply system is used to connect to the voltage input end of the blower in the tested vehicle; the static pressure collection interface is connected to the static pressure transmission device, and the static pressure transmission device is used to be placed in the cabin space to transfer the static pressure of the cabin space.

[0007] In an embodiment of the present application, the air volume collection device includes: a sealing plate and an air volume delivery pipe; the sealing plate is used to match and connect with the window frame of the target window in the vehicle under test; a vent is provided in the sealing plate, one end of the air volume delivery pipe is connected to the vent, the other end of the air volume delivery pipe is connected to the air inlet of the air volume table, and the vent of the sealing plate is connected to the cabin space of the vehicle under test.

[0008] In an embodiment of the present application, an electric damper is provided on the sealing plate, and the electric damper is used to close or open the ventilation opening provided on the sealing plate.

[0009] In an embodiment of the present application, the blower power supply system includes: a current clamp; the jaws of the current clamp are used to pass through a conductive wire connected to the power supply end of the blower power supply system; and the conductive end of the current clamp serves as a current collection end of the blower power supply system.

[0010] In an embodiment of the present application, the power supply end of the blower power supply system includes: a first power supply end connected to the power supply interface of the air volume table, and a second power supply end for connecting to the vehicle-mounted power supply end of the vehicle under test; the blower power supply system also includes: a power distribution device; the power distribution device is used to complete the switching between the air volume table power supply mode and the vehicle power supply mode; in the air volume table power supply mode, the power distribution device is used to connect the first power supply end and the power supply end of the blower power supply system; in the vehicle power supply mode, the power distribution device is used to connect the second power supply end and the power supply end of the blower power supply system.

[0011] In an embodiment of the present application, the static pressure transmission device includes: a static pressure test cylinder and a static pressure tube; a through hole is provided on the cylinder body of the static pressure test cylinder; one end of the static pressure tube is connected to the cylinder space inside the static pressure test cylinder, and the other end of the static pressure tube is connected to the static pressure collection interface of the air volume table.

[0012] In an embodiment of the present application, the device also includes a vibration sensor, and the air volume table also includes a vibration sensor interface; the vibration sensor interface is connected to the vibration sensor; the vibration sensor is used to be set on the blower to collect the blower vibration signal.

[0013] A whole-vehicle ventilation volume testing system comprises: a vehicle to be tested and a whole-vehicle ventilation volume testing device as described in any of the above embodiments; an air inlet of an air volume table in the testing device is connected to a cabin space of the vehicle to be tested via an air volume collecting device of the testing device; a power supply end of a blower power supply system in the testing device is connected to a voltage input end of a blower in the vehicle to be tested; and a static pressure transmission device in the testing device is placed in the cabin of the vehicle to be tested.

[0014] A whole vehicle ventilation volume testing method based on the whole vehicle ventilation volume testing system described in the above embodiment, the method comprising: using the whole vehicle ventilation volume testing equipment to obtain the air volume of the air conditioning system of the tested vehicle under a first simulated working condition as the total air volume in the vehicle, the first simulated working condition is the working condition when the air intake mode of the air conditioning system under the air volume testing condition is adjusted to an external circulation mode, and the blower operation state of the tested vehicle is the same as the blower operation state under the air volume testing condition; using the whole vehicle ventilation volume testing equipment to obtain the air volume of the tested vehicle under a second simulated working condition as the air leakage volume in the vehicle, the second simulated working condition is the working condition when the air intake mode of the air conditioning system under the first simulated working condition is adjusted to an internal circulation mode, the blower operation is stopped, and the static pressure in the vehicle under the first simulated working condition is the same as the static pressure in the vehicle under the first simulated working condition; according to the total air volume in the vehicle and the air leakage in the vehicle, determining the actual ventilation volume of the air conditioning system when it operates normally under the air volume testing condition.

[0015] In an embodiment of the present application, the total air volume in the vehicle is obtained in the following manner: when the air intake mode of the air-conditioning system under the air volume test condition is adjusted to the external circulation mode, the power supply voltage output by the test equipment to the blower is adjusted according to the blower voltage required for the air volume test condition; the air volume flowing through the test equipment is adjusted by adjusting the speed of the air volume table exhaust fan in the exhaust mode in the test equipment until the current value of the blower measured by the test equipment reaches the blower current required for the air volume test condition, so that the air-conditioning system of the vehicle under test operates under the first simulation condition; the current air volume measured by the test equipment is obtained as the total air volume in the vehicle.

[0016] In an embodiment of the present application, the air leakage amount in the vehicle is obtained in the following manner: when the air intake mode of the air-conditioning system under the air volume test condition is adjusted to the internal circulation mode, the connection between the power supply end of the blower power supply system in the test equipment and the power supply end of the blower power supply system is cut off to control the blower to stop running; by adjusting the working mode and speed of the exhaust fan of the air volume table in the test equipment, the air volume flowing through the full-vehicle ventilation test equipment is adjusted until the static pressure value in the vehicle measured by the test equipment is the same as the static pressure in the vehicle under the first simulation condition, so that the vehicle under test is in the second simulation condition, and the working mode includes exhaust mode or blowing mode; the current air volume measured by the test equipment is obtained as the air leakage amount in the vehicle.

[0017] In an embodiment of the present application, the blower voltage and the blower current are determined in the following manner: switching the power supply mode of the blower power supply system in the test equipment to the vehicle power supply mode; closing the electric damper of the air volume collecting device in the test equipment; when the air-conditioning system is operating under the air volume test condition, determining the speed of the blower based on the vibration signal of the blower measured by the test equipment; when the speed of the blower reaches the blower speed required by the air volume test condition, using the current value of the blower measured by the test equipment as the blower current, and using the voltage value of the blower measured by the test equipment as the blower voltage.

[0018] In summary, the vehicle ventilation volume test equipment, system and vehicle ventilation volume test method proposed in this application use an air volume collection device to transmit gas between the air volume table and the cabin of the vehicle under test, so that the air volume table can test the gas flow in the cabin space. The test equipment provides a DC power supply function to the vehicle under test through the power supply interface of the air volume table and the blower power supply system, realizes the test function of the blower current through the current collection interface of the air volume table and the blower power supply system, and realizes the test function of the cabin static pressure through the static pressure collection interface and static pressure transmission device of the air volume table. This application uses the power supply function and current collection function of the test equipment to adjust the operating state of the blower, so that the operating state of the blower during the air volume test is the same as the operating state of the blower under the actual operating conditions of the air conditioning system, and then uses the air volume test function and the static pressure collection function of the test equipment to obtain the air volume and cabin static pressure in the car when the air conditioning system is working normally, and uses the exhaust and blowing functions of the air volume table to restore the cabin static pressure to the static pressure when the air conditioning system is working normally when the air conditioning system stops working, and measures the air volume in the car at this time as the cabin air leakage. In this way, the test equipment proposed in this application can measure the total air volume and air leakage of the air conditioning system when it is working in any mode, so as to accurately determine the actual ventilation volume of the air conditioning system in any mode, without having to set up tooling for each air outlet. The test equipment is more convenient to use and can obtain the actual air volume of the whole vehicle more quickly and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0020] Figure 1 is a structural schematic diagram of a whole vehicle ventilation volume testing system according to an exemplary embodiment of the present application;

[0021] Figure 2 It is a structural schematic diagram of an air volume table in a vehicle ventilation volume testing device according to an exemplary embodiment of the present application;

[0022] Figure 3 It is a structural schematic diagram of an air volume collection device in a vehicle ventilation volume testing device according to an exemplary embodiment of the present application;

[0023] Figure 4 is a structural schematic diagram of a blower power supply system in a vehicle ventilation volume test device according to an exemplary embodiment of the present application;

[0024] Figure 5 is a structural schematic diagram of a static pressure transmission device in a vehicle ventilation volume testing device according to an exemplary embodiment of the present application;

[0025] Figure 6 is a flow chart of a method for testing the ventilation volume of a whole vehicle according to an exemplary embodiment of the present application;

[0026] Figure 7 is a flow chart of a method for testing the ventilation volume of a whole vehicle according to another exemplary embodiment of the present application;

[0027] Figure 8 is a flow chart of a method for testing the ventilation volume of a whole vehicle according to another exemplary embodiment of the present application;

[0028] Fig. 9 It is a flow chart of a method for testing the ventilation volume of a whole vehicle according to another exemplary embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described by referring to the drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, but does not exclude the presence or addition of one or more other features, integers, steps, operations and / or groups thereof.

[0031] It should also be understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0032] As used in the present specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]", depending on the context.

[0033] In addition, in the description of the present specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0034] References to "one embodiment" or "some embodiments" etc. described in the present specification mean that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0035] like Figure 1-5 As shown, the testing equipment 1 for the ventilation volume of the whole vehicle may include but is not limited to an air volume table 2, a blower power supply system 3, an air volume collection device 4, a static pressure transmission device 5, and the like.

[0036] The air volume table 2 may include but is not limited to an air inlet 21, an air outlet 22, a power supply interface 23, a current collection interface 24, a static pressure collection interface 25, and the like.

[0037] The blower power supply system 3 may include but is not limited to a power supply terminal 31 , a current collection terminal 32 , a power supply terminal 33 and the like.

[0038] The air volume table 1 is provided with a nozzle pressure differential air volume table body, which is arranged between the air inlet 21 and the air outlet 22, and the air volume table body tests the air volume entering the air volume table through the air inlet 21. In addition, the air volume table is also provided with a DC voltage stabilized power supply, a DC ammeter, a static pressure sensor and other equipment, which provide power supply function, current collection function, static pressure collection function and the like through the interface provided on the air volume table.

[0039] The connection / communication relationship between the air volume table 2, the blower power supply system 3, the air volume collection device 4 and the static pressure transmission device 5 is as follows:

[0040] The air inlet 21 of the air volume table 2 is connected to the cabin space of the tested vehicle through the air volume collection device 4. It can be understood that the air volume collection device 4 is used to provide a gas transmission channel for the cabin space and the air volume table 1;

[0041] The power supply interface 23 is connected to the power supply terminal 31 of the blower power supply system 3, the current collection interface 24 is connected to the current collection terminal 32 of the blower power supply system, and the power supply terminal 33 of the blower power supply system is used to connect to the voltage input terminal of the blower in the tested vehicle;

[0042] The static pressure collection interface 25 is in communication with the static pressure transmission device 5 , and the static pressure transmission device 5 can be placed in the cabin space of the tested vehicle to transmit the static pressure of the cabin space to the static pressure collection interface.

[0043] The vehicle ventilation volume testing device 1 proposed in the present application can transmit the gas in the cabin space to the air volume table 2 through the air volume collection device 4, and the air volume table body arranged in the air volume table 2 measures the gas flow passing through the air volume table; in addition, the testing device 1 can collect the static pressure in the cabin in real time through the static pressure collection interface; the testing device 1 can provide DC regulated power to the blower in the tested vehicle through the power supply interface to drive the blower to rotate; during the operation of the blower in the tested vehicle, the testing device can test the current of the blower in the tested vehicle through the current collection interface.

[0044] In some embodiments, an operation panel and a display panel can be set on the air volume table. The voltage output by the power supply interface and the speed of the exhaust fan of the air volume table can be adjusted through the operation panel, and the air volume, static pressure value, current value, etc. measured by the air volume table can be displayed through the display panel.

[0045] This application determines the power of the blower through the voltage value output by the power supply interface and the current value collected by the current collection interface, so that the blower operates at the power required by a certain mode of the air-conditioning system, ensuring that the working condition of the air-conditioning system during the total air volume test in the vehicle is the same as the working condition of the air-conditioning system when it is actually running in a certain mode. The static pressure value when the air-conditioning system is actually running in a certain mode is determined by the static pressure collection interface, and the current air volume is tested using an air volume table. Then, after the air-conditioning system stops working, the air volume table is used to adjust the cabin gas pressure, simulate the static pressure value in the vehicle when the air-conditioning system is running, and test the air leakage at this time.

[0046] In summary, the vehicle ventilation volume test equipment proposed in this application uses an air volume collection device to transfer gas between the air volume table and the cabin of the vehicle under test, so that the air volume table can test the gas flow in the cabin space. The test equipment provides a DC power supply function to the vehicle under test through the power supply interface of the air volume table and the blower power supply system, realizes the test function of the blower current through the current collection interface of the air volume table and the blower power supply system, and realizes the test function of the cabin static pressure through the static pressure collection interface and static pressure transmission device of the air volume table. This application uses the power supply function and current collection function of the test equipment to adjust the operating state of the blower so that the test condition is the same as the actual operating condition of the air conditioning system, and then uses the air volume test function and the static pressure collection function of the test equipment to obtain the air volume and cabin static pressure in the vehicle under the normal working state of the air conditioning system, and uses the exhaust and blowing functions of the air volume table to restore the cabin static pressure to the static pressure when the air conditioning system stops working, and measures the air volume in the vehicle at this time as the cabin air leakage. In this way, the test equipment proposed in this application can measure the total air volume and air leakage of the air-conditioning system when it works in any mode, so as to accurately measure the actual ventilation volume of the air-conditioning system in any mode. There is no need to set up tooling for each vent. The test equipment is more convenient to use and can obtain the air volume of the entire vehicle more quickly.

[0047] Based on the above embodiments, Figure 3 As shown, the air volume collection device 4 may include a sealing plate 41 and an air volume delivery pipe 42;

[0048] A vent 43 is provided in the sealing plate 41, one end of the air volume delivery pipe 42 is connected to the vent 43, and the other end of the air volume delivery pipe 42 is connected to the air inlet 22 of the air volume table 1;

[0049] The sealing plate 41 matches the window frame of the target window in the tested vehicle. For example, the shape of the sealing plate 41 is the same as the shape of the driver's window. After the driver's window is fully lowered, the sealing plate 41 can be embedded in the driver's window frame. During the air volume test, the windows at other positions are raised so that the air in the cabin is transmitted to the air volume table through the vents on the sealing plate to prevent cabin gas leakage from affecting the air volume test results.

[0050] In addition, an electric damper 44 matching the vent can be provided on the sealing plate 41. The electric damper 44 is opened when the air volume in the vehicle needs to be tested, and is closed before the air volume test to maintain the windows of the vehicle sealed during actual use.

[0051] The control end of the electric damper can be connected to a controller in the air volume table through a signal line, or an operation button can be arranged on the air volume table and the signal line can be connected to the operation button.

[0052] For example, the air volume collection device is used as a connection device between the air volume table and the car body. It guides the air volume in the car into the air volume table to test the air volume. It is sealed and connected to the front door side window of the car through a sealing plate with a shape similar to the front side window glass of the car with cloth-based glue. Then, the car lowers the corresponding front side window glass to complete the connection. The sealing plate is connected to the air volume table through a flexible corrugated air duct with a diameter of about 15 cm. There is also an electric damper on the sealing plate, which can open or close the vents on the air volume collection device according to the different modes of this device.

[0053] Based on the above embodiments, Figure 4 As shown, the blower power supply system 3 may include a current clamp 34 and a power distribution device 35 .

[0054] In some embodiments, the jaws of the current clamp 34 are encircled on the conductive wire connected to the power supply terminal 31 of the blower power supply system 3. The jaws of the current clamp 34 can be encircled on the external wire connected to the power supply terminal 31, for example, the jaws of the current clamp 34 are encircled on the conductive wire connecting the power supply terminal 31 and the air volume table power supply interface 23; or the jaws of the current clamp 34 are encircled on the internal conductive wire connected to the power supply terminal 31, for example, the jaws of the current clamp 34 are encircled on the conductive wire connecting the power supply terminal 31 and the power supply terminal 33.

[0055] The conductive end on the current clamp 34 serves as a current collection end of the blower power supply system 3 .

[0056] The present application utilizes a current clamp to achieve contactless collection of the blower current.

[0057] The power supply end 31 of the blower power supply system may include a first power supply end and a second power supply end; the first power supply end is connected to the power supply interface of the air volume table 1; the second power supply end is used to connect to the on-board power supply end of the vehicle under test, and the on-board power supply end can be understood as the power supply end in the vehicle that powers the blower.

[0058] The first end of the power distribution device is connected to the first power end, the second end of the power distribution device is connected to the second power end, and the third end of the power distribution device is connected to the power supply end of the blower power supply system.

[0059] The power distribution device can be used to control the connection between the first end and the third end of the power distribution device, so that the voltage output by the air volume table is transmitted to the voltage input end of the blower of the vehicle under test to power the blower. This situation can be described as the air volume table power supply mode; or the second end and the third end are connected, so that the voltage output by the on-board power supply end of the vehicle under test is transmitted to the voltage input end of the blower of the vehicle under test to power the blower. This situation can be described as the vehicle power supply mode.

[0060] In some embodiments, in addition to outputting a DC voltage when the blower needs to be powered, the power supply interface of the air volume station can also be used to test the terminal voltage of the blower when the blower does not need to be powered. For example, in the vehicle power supply mode, the second end and the third end of the power distribution device are connected, and at the same time, the branch responsible for power supply in the DC regulated power supply module in the air volume station is disconnected, and the voltage test branch responsible for voltage testing works. In this case, the power supply interface of the air volume station is equivalent to the voltage test interface. The first end of the power distribution device is also connected to the third end, so that the power supply interface of the air volume station is connected between the vehicle power supply end and the voltage input end of the blower, and the terminal voltage of the blower is tested using the voltage test function of the power supply interface of the air volume station.

[0061] The connection relationship between the terminals of the power distribution device can be switched by leading a control line from the power distribution device and connecting the other end of the control line to the operation panel of the air volume table, or by connecting the other end of the control line to the pin of the controller.

[0062] For example: the power distribution device is connected to the blower motor plug on the vehicle under test, and the power distribution device can switch between the vehicle power supply mode and the air volume table power supply mode according to the test mode. The power distribution device leads out a power line to connect to the DC regulated power supply on the air volume table. A current clamp is attached to the power line for non-contact measurement of the blower current, and the ammeter body corresponding to the current clamp is placed in the air volume table.

[0063] The present application realizes switching between the air volume table power supply and vehicle power supply modes by setting a power distribution device in the blower power supply system, so that after the test equipment is connected to the vehicle under test, the power supply of the blower can be conveniently and flexibly switched to restore the blower to operate in the vehicle power supply environment without removing the test equipment from the vehicle under test, thereby providing convenience for the entire air volume test process.

[0064] Based on the above embodiments, Figure 5 As shown, the static pressure transmission device 5 may include but is not limited to: a static pressure test cylinder 51 and a static pressure tube 52 .

[0065] The body of the static pressure test cylinder 51 is provided with a through hole.

[0066] For example, the through holes can be evenly and densely arranged on the barrel. It should be noted that the number, size and distribution of the through holes can be set as needed, and this application does not impose any restrictions.

[0067] One end of the static pressure tube 52 is communicated with the inner space of the static pressure test tube 51 , and the other end of the static pressure tube 52 is communicated with the static pressure collection interface of the air volume table 1 .

[0068] For example, the static pressure transmission device 5 in the present application may be composed of a static pressure test cylinder 51 responsible for sensing static pressure and a static pressure pipe 52 connecting the test cylinder with the sensor. During the test, the static pressure pipe 52 passes through the gap of the car door, and the test cylinder 51 is placed on the rear seat in the sealed car. The test cylinder 51 has dense small holes evenly opened in all directions to ensure that the wind pressure can be offset by the small holes facing the wind and being blown, so as to measure accurate static pressure.

[0069] The present application utilizes a static pressure transmission device to transmit the static pressure inside the vehicle to the air volume table for measurement. There is no need to set up test tools in the vehicle cabin to perform test operations in the vehicle cabin. All test processes and operation processes can be implemented on the air volume table operation panel, simplifying the cumbersome equipment setup and testing process.

[0070] On the basis of the above embodiment, the test device 1 may further include a vibration sensor, and the air volume table may further include a vibration sensor interface 26;

[0071] The vibration sensor interface 26 is connected to the vibration sensor;

[0072] The vibration sensor is used to be arranged on the blower to collect the vibration signal of the blower.

[0073] The air volume table can be used to determine the blower speed based on the collected vibration signal.

[0074] For example, a vibration sensor data acquisition device (referred to as vibration sensor data acquisition) is set up in the air volume table. The vibration sensor data acquisition is connected to the vibration sensor through the vibration sensor interface, and the vibration sensor is powered and the vibration signal collected by the vibration sensor is obtained. The vibration sensor device is connected to the controller in the air volume table, and the vibration acceleration corresponding to the vibration signal is transmitted to the controller. The controller stores the relationship expression between the vibration acceleration and the blower motor speed, so that the controller can calculate the current speed of the blower motor, or directly express it as the blower speed.

[0075] This application adds a blower vibration acceleration collection function to the test equipment by setting a vibration sensor in the test equipment and connecting the vibration sensor and the air volume table vibration sensor interface, and finally realizes the test function of the blower speed, so as to facilitate the acquisition or monitoring of the blower speed during the air volume test.

[0076] The present application also proposes a vehicle ventilation volume test system, comprising a vehicle to be tested 6 and a vehicle ventilation volume test device 1 as described in any of the above embodiments. Figure 1 As shown, the sealing plate of the air volume collecting device in the test equipment 1 is tightly fitted with the window frame of the window at the driver's position in the tested vehicle 2;

[0077] Connect the power supply terminal of the blower power supply system 3 in the test equipment 1 to the voltage input terminal of the blower in the vehicle under test;

[0078] Place the static pressure transfer device in the cabin of the vehicle under test.

[0079] In this way, the air volume circulating in the cabin of the tested vehicle can be transmitted to the air volume table for air volume testing through the test equipment, and the static pressure in the cabin can be transmitted to the air volume table for static pressure testing through the static pressure transmission device. The terminal voltage of the blower can be controlled by powering the blower, and the current collection end in the blower power supply system can be used to facilitate the air volume table to monitor the current condition of the blower, so as to monitor the operating status of the blower during the air volume test and the static pressure test, thereby obtaining the ventilation volume of the blower under the specified operating state and the back pressure it withstands.

[0080] For example: the air volume table can be understood as the assembly body of the test equipment for the ventilation volume of the whole vehicle. The air volume table is composed of a traditional nozzle pressure difference air volume table and the hardware added in this application. For example, the hardware that can be added includes:

[0081] A DC regulated power supply, which is connected to the blower power supply system through a power line, provides it with electric energy and a control signal of the blower speed, and measures the blower power supply voltage;

[0082] A DC ammeter, which is the body of a non-contact ammeter, is connected to the current clamp in the blower power supply system with a signal line and is used to measure the current of the blower in vehicle power supply mode and air volume table power supply mode;

[0083] Vibration sensor data acquisition, which has the function of supplying power to the vibration sensor and collecting vibration voltage signals, and is connected to the vibration sensor through a signal line;

[0084] The built-in signal processing software in the air flow table computer system can convert the vibration sensor signal into a speed signal and display it on the air flow table screen;

[0085] Static pressure sensor, which can obtain the static pressure in the static pressure tube by comparing the average air pressure in the static pressure tube with the atmospheric pressure outside the tube. It is connected to the static pressure test cylinder through the static pressure tube to test the air pressure in the car;

[0086] In addition, the air volume collection device is connected to a window of the vehicle through cloth-based adhesive, adhered to the outside of the window and kept sealed. During the test, the window is always in the lowered state;

[0087] The power distribution module of the blower power supply system is connected to the blower connector on the vehicle HVAC (heating, ventilation and air conditioning system), and the module is connected to the blower power supply end of the vehicle. The current clamp is simultaneously across the power supply line of the blower power supply system and the vehicle power supply line for testing current;

[0088] The static pressure tube connects the static pressure test cylinder in the car and the static pressure sensor of the air volume table through the gap of the car door. The static pressure test cylinder is fixed on the rear seat to prevent the static pressure from being blown by the air flow from the air-conditioning outlet to improve the test accuracy.

[0089] The present application also proposes a method for testing the full vehicle ventilation volume based on the full vehicle ventilation volume testing system shown in the above embodiment, such as Figure 6 As shown, the method comprises the following steps:

[0090] S601, using the whole vehicle ventilation volume test equipment to obtain the air volume of the air-conditioning system of the tested vehicle under the first simulated working condition as the total air volume in the vehicle, the first simulated working condition is the working condition when the blower operating state of the tested vehicle is the same as the blower operating state under the air volume test condition after the air intake mode of the air-conditioning system under the air volume test condition is adjusted to the external circulation mode.

[0091] S602, using the vehicle ventilation volume test device to obtain the air volume of the vehicle under test under a second simulated working condition as the in-vehicle air leakage volume, wherein the second simulated working condition is a working condition in which the air intake mode of the air conditioning system under the first simulated working condition is adjusted to an internal circulation mode, the blower is stopped, and the in-vehicle static pressure of the vehicle under test is the same as the in-vehicle static pressure under the first simulated working condition;

[0092] S603: Determine the actual ventilation volume of the air conditioning system when it operates normally under the air volume test condition according to the total air volume in the vehicle and the air leakage volume in the vehicle.

[0093] The air volume test condition can be understood as the operating condition of the air-conditioning system of the vehicle under test in different working modes or different functions. For example, the air volume test condition can be the operating condition of the air-conditioning system with different air volume gears, and / or different air outlet modes, and / or different air intake modes, such as full cold blowing face internal circulation 8 gears, full cold blowing foot external circulation 8 gears, etc.

[0094] During the air volume test, the total air volume and air leakage in the vehicle are tested using the vehicle ventilation volume test equipment.

[0095] For example, the air volume test condition that currently requires air volume testing is the operating condition of the air conditioning system under full cold blowing surface internal circulation 8th gear. Then when testing the total air volume in the car, first adjust the air intake mode of the air conditioning system under the air volume test condition to the external circulation mode, and other modes except the air intake mode remain unchanged, and then adjust the blower speed, current, and voltage to the same as the air volume test condition, and then use the full vehicle ventilation test equipment to test the full vehicle ventilation in this case. When testing the air leakage in the car, first adjust the air intake mode of the air conditioning system under the air volume test condition to the internal circulation mode, and other modes except the air intake mode remain unchanged, then stop the blower, and adjust the static pressure in the car to the static pressure value corresponding to the total air volume in the car. It can also be understood as adjusting the static pressure in the car to the same static pressure value as the air volume test condition, and then use the full vehicle ventilation test equipment to test the air leakage in the car in this case.

[0096] It is not difficult to understand that the external circulation mode is to inhale fresh air from outside the car, send it into the car after being processed by the air conditioning system. The internal circulation mode circulates the air in the car without introducing fresh air from outside.

[0097] The purpose of testing the ventilation volume in the car in this application is to obtain the ventilation volume of the blower under the above-mentioned air volume test conditions. Regardless of the internal circulation mode or the external circulation mode, the air blown out from the air outlet must pass through the blower. In the internal circulation mode, the air in the cabin is exchanged with the outside air, so the ventilation volume in the car cannot well represent the ventilation volume of the blower. Therefore, when testing the ventilation volume of the blower, this application sets the air intake mode of the air-conditioning system to the external circulation mode, and sends the outside air into the car, which correspondingly pushes the gas in the car through the air volume collection device in the test equipment to be transmitted to the air volume table. Therefore, the air volume measured by the air volume table can represent the ventilation volume of the blower.

[0098] In the internal circulation mode, the ventilation channels inside and outside the car are closed. When the blower is turned off, the airflow inside the car does not circulate. When the blower is turned on, the airflow sucked in only comes from inside the car, forming an airflow circulation inside the vehicle. When testing the air leakage inside the car, this application sets the air intake mode of the air conditioning system to the internal circulation mode and closes the ventilation channels inside and outside the car. In this case, the air volume measured by the air volume station can represent the air volume flowing in or out of the gaps in the doors and windows and the structural gaps such as the pressure relief valve, that is, the air leakage inside the car.

[0099] The present application calculates the actual ventilation volume in the vehicle based on the measured total air volume and air leakage volume in the vehicle, that is, the actual ventilation volume of the blower or the actual ventilation volume of the air outlet of the air-conditioning system under the above-mentioned air volume test conditions.

[0100] Based on the above embodiments, Figure 7 As shown, the total air volume in the car is tested in the following ways:

[0101] S701, when the air intake mode of the air conditioning system under the air volume test condition is adjusted to the external circulation mode, adjusting the power supply voltage output by the test device to the blower according to the blower voltage required by the air volume test condition;

[0102] S702, adjusting the speed of the exhaust fan of the air volume table in the test equipment in the exhaust mode to adjust the air volume flowing through the test equipment until the current value of the blower measured by the test equipment reaches the blower current required by the air volume test condition, so that the air conditioning system of the vehicle under test operates under the first simulation condition;

[0103] S703: Obtain the current air volume measured by the test equipment as the total air volume in the vehicle.

[0104] The blower voltage and blower current required for the air volume test condition are the terminal voltage and terminal current of the blower when the air conditioning system is operating under the air volume test condition.

[0105] When starting to test the total air volume in the vehicle, set the power distribution device in the blower power supply system in the test equipment to the blower power supply mode, and adjust the voltage output by the DC regulated power supply in the test equipment so that the power supply voltage output by the test equipment to the blower is the same as the terminal voltage of the above-mentioned blower.

[0106] If the voltage applied to the blower during the total air volume test is the same as the terminal voltage when the blower is actually operating under the air volume test conditions, the speed should be the same in both cases.

[0107] When the voltage and speed applied to the blower reach the blower voltage and speed required for the air volume test condition, it is necessary to further control the current of the blower to reach the blower current required for the air volume test condition. Therefore, the present application further adjusts the terminal current of the blower:

[0108] For example, the exhaust fan of the air volume table in the test equipment is used to extract the air in the cabin, so as to reduce the air pressure in the cabin. Under the action of the pressure difference between the inside and the outside, the gas flow rate that needs to be delivered to the car through the blower increases, the power of the blower will increase, and under the condition of a fixed blower voltage, the blower current increases. The present application adjusts the speed of the exhaust fan of the air volume table in the test equipment in the exhaust mode to adjust the gas pressure in the cabin, and correspondingly adjusts the air volume flowing through the blower and the air volume flowing through the test equipment. When the blower current also reaches the blower current required for the above-mentioned air volume test condition, the blower power and speed are the same as the air volume test condition. Therefore, it can be considered that the current ventilation volume of the blower is equal to the ventilation volume of the blower under the air volume test condition.

[0109] Therefore, in this application, when the blower current, blower voltage, and blower speed all reach the blower current, voltage, and speed required by the air volume test condition, the air volume measured by the air volume station is used as the total air volume in the vehicle.

[0110] Based on the above embodiments, Figure 8 As shown, the air leakage in the car can be tested in the following ways:

[0111] S801, when the air intake mode of the air conditioning system under the air volume test condition is adjusted to the internal circulation mode, cutting off the connection between the power supply end of the blower power supply system in the test equipment and the power supply end of the blower power supply system to control the blower to stop running;

[0112] S802, adjusting the air volume flowing through the whole vehicle ventilation test equipment by adjusting the working mode and the rotation speed of the air volume table exhaust fan in the test equipment until the vehicle interior static pressure value measured by the test equipment is the same as the vehicle interior static pressure under the first simulated working condition, so that the tested vehicle is placed under the second simulated working condition, and the working mode includes an exhaust mode or a blast mode;

[0113] S803, obtaining the current air volume measured by the test equipment as the air leakage volume in the vehicle.

[0114] When testing the air leakage in the vehicle, the test equipment no longer supplies power to the blower. For example, after the total air volume test in the vehicle is completed, the DC regulated power supply in the air volume table is turned off, and the working mode and speed of the exhaust fan in the air volume table are adjusted so that the static pressure value collected by the static pressure collection interface of the air volume table reaches the static pressure value corresponding to the total air volume in the vehicle.

[0115] For example, after the total air volume test in the car is completed, the DC regulated power supply in the air volume station is turned off, and the power supply to the blower is stopped. At this time, the blower stops running, and the static pressure in the car at this time is obtained through the static pressure collection interface of the air volume station. If the static pressure in the car at this time is lower than the static pressure value corresponding to the total air volume in the car, the exhaust fan draws air in the car, and the speed of the exhaust fan can be adjusted according to the difference between the current static pressure in the car and the static pressure value corresponding to the total air volume in the car, until the static pressure in the car collected by the static pressure collection interface reaches the static pressure value corresponding to the total air volume in the car; if the static pressure in the car is higher than the static pressure value corresponding to the total air volume in the car, the exhaust fan is controlled to blow air into the cabin, and the speed of the exhaust fan can be adjusted according to the difference between the current static pressure in the car and the static pressure value corresponding to the total air volume in the car, until the static pressure in the car collected by the static pressure collection interface reaches the static pressure value corresponding to the total air volume in the car.

[0116] In this application, when the air conditioning system is in the internal circulation mode, the ventilation channels inside and outside the car are closed, the blower stops running, and the static pressure value inside the car reaches the static pressure when the blower is running under the air volume test condition, the air volume under this situation is tested by the air volume table. The air volume is the air volume leaked from the result gap inside the car when the blower is running under the air volume test condition. A positive or negative sign can be added before the air volume value to indicate the direction of the leakage, with "+" indicating leakage from outside the car to inside the car, and "-" indicating leakage from inside the car to outside the car.

[0117] The static pressure value corresponding to the total air volume in the vehicle is: during the test of the total air volume in the vehicle, when the current value of the blower measured by the test equipment reaches the blower current, the static pressure value in the vehicle measured by the test equipment. That is, the static pressure value collected when the air volume station measures the total air volume in the vehicle.

[0118] In some embodiments, the correspondence between the blower ventilation volume and the static pressure in the vehicle may also be pre-calibrated, so that after the total air volume in the vehicle is obtained on the test bench, the static pressure value corresponding to the total air volume in the vehicle is determined in combination with the pre-calibrated relationship.

[0119] Therefore, the present application combines the static pressure collection function, current collection function of the test equipment, the air volume test function of the air volume table, and the exhaust and blowing function of the air volume table to restore the static pressure state of the cabin under the actual operating conditions of the air-conditioning system, and then uses the air volume in the car under this state of the air volume table to obtain the air leakage volume in the car. The testing process is convenient and can be applied to multiple different air volume test conditions, and has a wider applicability.

[0120] Based on the above embodiments, Fig. 9 As shown, the blower voltage in step S701 and the blower current in step S702 can be determined in the following manner:

[0121] S901, switching the power supply mode of the blower power supply system in the test equipment to the vehicle power supply mode;

[0122] S902, closing the electric damper of the air volume collection device in the test equipment;

[0123] S903, when the air conditioning system is operating under the air volume test condition, determining the rotation speed of the blower based on the vibration signal of the blower measured by the test equipment.

[0124] S904, when the rotation speed of the blower reaches the blower rotation speed required by the air volume test condition, the current value of the blower measured by the test equipment is used as the blower current, and the voltage value of the blower measured by the test equipment is used as the blower voltage.

[0125] The power distribution device in the blower power supply system of the test equipment is set in the vehicle power supply mode. After the voltage input terminal of the blower is connected to the vehicle power supply terminal, the blower starts to run.

[0126] Turn off the power supply function of the DC regulated power supply in the air volume table, turn on the voltage collection function, and use the power supply interface on the air volume table to collect the voltage of the blower.

[0127] When the blower current and blower voltage are obtained under the air volume test condition, the electric damper of the vent on the air volume collection device can be closed first to restore the closed cabin condition when the air conditioning system is actually running. The electric damper can be opened when the total air volume and air leakage in the vehicle are tested using the air volume table, so that the air in the vehicle can flow into the air volume table.

[0128] The vibration sensor acquisition device in the air volume control table starts to work, supplies power to the vibration sensor installed on the blower, and collects the vibration signal of the blower. The speed calculation program stored in the air volume table controller is used to calculate the corresponding blower speed according to the vibration signal.

[0129] When the blower speed reaches the blower speed required by the air volume test condition, the current value collected by the current collection interface of the air volume station in the test equipment is used as the blower current in the above step S702, and the voltage value collected by the power supply interface of the air volume station in the test equipment is used as the blower voltage in the above step S701.

[0130] In this way, the blower voltage and blower current required for the air volume test conditions are unified with the current collection and voltage collection equipment during the total air volume test and leakage test in the vehicle, thereby reducing errors and improving the functions of the test equipment.

[0131] In some embodiments, the blower speed, blower current and blower voltage of the air-conditioning system under different air volume test conditions can be directly obtained on the vehicle in advance and stored in a table so that when the total air volume and leakage volume tests are performed using the test equipment, the blower voltage, blower current and blower speed required for the target air volume test conditions can be obtained by looking up the table.

[0132] To facilitate understanding of the vehicle ventilation volume test method proposed in this application, the complete process of performing a vehicle ventilation volume test using a vehicle ventilation volume test system is now described by way of example:

[0133] This application can be used to quickly measure the vehicle air volume in various air outlet, mixing and internal and external circulation modes.

[0134] The working process is as follows:

[0135] (1) Detect the blower information under the required test air volume conditions. According to the test air volume conditions, close the electric valve of the air volume collection device vent, adjust the power distribution device to the vehicle power supply, turn on the terminal voltage test function of the DC regulated power supply, the current test function of the non-contact ammeter, and the speed test function of the vibration sensor. Then adjust the vehicle to the air volume gear, mixed mode, air outlet mode, etc. that need to be tested. Record the voltage, current, and speed information of the blower under each air volume test condition.

[0136] And make a table as shown in Table 1.

[0137]

[0138] Table 1 Blower information table recorded according to air volume test conditions

[0139] (2) Adjust the static pressure (blower back pressure) in the vehicle so that the blower is at the same voltage, current and speed as in step 1, and measure the total ventilation air volume at this time. Specifically: open the electric damper on the air volume collection device, adjust the air intake mode of the HVAC (air conditioning system) in the vehicle to external circulation, and keep other modes unchanged. Adjust the power distribution device to the air volume table for power supply. Turn on the DC regulated power supply, static pressure sensor and air volume test function on the air volume table, and adjust to the same blower terminal voltage as in step 1. At this time, the blower starts to work, and the speed value is also the same as in step 1. However, since the flow path and pressure loss of air flowing through the air volume table in the external circulation mode may be different from the working condition of step 1, the blower current may be different from that in step 1. In this case, turn on the exhaust fan on the air volume table to draw negative pressure into the tested vehicle. At this time, the blower current will increase and approach the current in step 1, and the total negative pressure in the vehicle measured will increase. By adjusting the exhaust fan speed of the air volume table, the blower current is exactly the same as that in the corresponding working condition in step 1. It can be assumed that the air volume flowing through the blower at this time is exactly the same as that in step 1. Record the vehicle back pressure at this time and the air volume read by the air volume table. And make a table as shown in Table 2:

[0140]

[0141] Table 2 Statistics of blower current, static pressure in the vehicle, and total air volume in the vehicle under simulated air volume test conditions

[0142] (3) Since the total air volume at this time also includes the air volume flowing in or out of the door and window gaps and the pressure relief valve when static pressure is generated in the car, they need to be subtracted. Therefore, this step is to test the air leakage of the vehicle when the static pressure is generated in the car. Specifically as follows: The HVAC air intake mode is adjusted to internal circulation, and the air volume table cuts off the power supply to the blower. The air volume table exhaust fan draws or blows air into the car to make the car reach the static pressure under the corresponding working conditions in step 2. The air volume table measures the air volume. The air volume at this time is the air volume leaked from the gaps in the vehicle and the pressure relief valve (leakage from outside to inside is +, and vice versa is -). And make a table as shown in Table 3:

[0143]

[0144] Table 3 Correspondence between static pressure and air leakage in the vehicle under simulated air volume test conditions

[0145] (4) Based on the total air volume and air leakage simulated under each working condition, the actual ventilation volume of the tested air conditioning system is obtained, as shown in Table 4 below:

[0146]

[0147] Table 4 Example of test results of vehicle ventilation volume under various working conditions

[0148] In summary, the present invention discloses a test device for quickly and easily measuring the ventilation volume of the entire vehicle and an application method thereof. The advantage is that there is no need to make a separate tooling for each air outlet, and there is no need to measure each air outlet separately, and the air volume of the entire vehicle can be measured at one time. This equipment indirectly tests the ventilation volume of the entire vehicle through the relationship between the blower's electrical power, static pressure, and air volume, eliminating the trouble of making air volume collection tooling for each air outlet, and there is no need to test and add the air volume of each air outlet separately, which greatly improves the test efficiency and reduces the test cost. In particular, for air outlets that are located closer to the inside, flat in shape, and difficult to make and connect air volume collection tooling, the effect is more obvious, and it has certain advancedness and practical value.

[0149] In general, the present invention has the following advantages over the prior art:

[0150] (1) The present invention can achieve one-time testing to obtain the air volumes under various double-layer flow or internal circulation modes. Compared with the traditional method of testing the air volumes of each air outlet separately and then adding them up, a lot of testing time is saved and work efficiency is improved.

[0151] (2) The present invention does not require the production of a matching air volume collection tool for each air outlet, thus saving time, materials and costs for tool production, reducing testing costs and improving testing efficiency.

[0152] (3) When testing the air volume in the internal circulation mode, the present invention avoids the change of the near-flow field outside the air outlet caused by the tooling connected to the air outlet, thereby achieving better test accuracy.

[0153] (4) The present invention can test the air volume in the double-laminar flow mode, thus overcoming the shortcomings that the PQ curve method cannot measure the static pressure inside the vehicle in this mode and the air outlet air volume collection method cannot obtain the double-laminar flow static pressure.

[0154] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A test device for the ventilation volume of a whole vehicle, characterized in that: include: Air volume table, blower power supply system, air volume collection device and static pressure transmission device; The air volume table includes an air inlet, an air outlet, a power supply interface, a current collection interface, and a static pressure collection interface; The air inlet is connected to the cabin space of the vehicle under test through the air volume collecting device; The power supply interface is connected to the power supply end of the blower power supply system, the current collection interface is connected to the current collection end of the blower power supply system, and the power supply end of the blower power supply system is used to connect to the voltage input end of the blower in the tested vehicle; The static pressure collection interface is in communication with the static pressure transmission device, and the static pressure transmission device is used to be placed in the vehicle cabin space to transmit the static pressure of the vehicle cabin space.

2. The device according to claim 1, characterized in that The air volume collection device comprises: a sealing plate and an air volume delivery pipe; The sealing plate is used to match and connect with the window frame of the target window in the tested vehicle; The sealing plate is provided with a vent, one end of the air volume delivery pipe is connected to the vent, the other end of the air volume delivery pipe is connected to the air inlet of the air volume table, and the vent of the sealing plate is connected to the cabin space of the vehicle under test.

3. The device according to claim 2, characterized in that The sealing plate is provided with an electric damper, and the electric damper is used to close or open the ventilation opening provided on the sealing plate.

4. The device according to claim 1, characterized in that The blower power supply system comprises: a current clamp; The jaws of the current clamp are used to pass through a conductive wire connected to a power supply terminal of the blower power supply system; The conductive end of the current clamp serves as a current collection end of the blower power supply system.

5. The device according to claim 1, characterized in that The power supply end of the blower power supply system includes: a first power supply end connected to the power supply interface of the air volume table, and a second power supply end for connecting to the vehicle-mounted power supply end of the tested vehicle; the blower power supply system also includes: a power distribution device; The power distribution device is used to complete the switching between the wind volume table power supply mode and the vehicle power supply mode; In the air volume table power supply mode, the power distribution device is used to connect the first power supply end and the power supply end of the blower power supply system; In the vehicle power supply mode, the power distribution device is used to connect the second power supply end and the power supply end of the blower power supply system.

6. The device according to claim 1, characterized in that The static pressure transmission device comprises: a static pressure test cylinder and a static pressure pipe; The body of the static pressure test cylinder is provided with a through hole; One end of the static pressure tube is communicated with the inner space of the static pressure test tube, and the other end of the static pressure tube is communicated with the static pressure collection interface of the air volume table.

7. The device according to claim 1, characterized in that The device also includes a vibration sensor, and the air volume table also includes a vibration sensor interface; The vibration sensor interface is connected to the vibration sensor; The vibration sensor is used to be arranged on the blower to collect the vibration signal of the blower.

8. A system for testing the ventilation volume of a whole vehicle, characterized in that: include: A vehicle under test and a vehicle ventilation volume test device as claimed in any one of claims 1 to 7; The air inlet of the air volume table in the test equipment is connected to the cabin space of the tested vehicle through the air volume collecting device of the test equipment; A power supply terminal of the blower power supply system in the test equipment is connected to a voltage input terminal of the blower in the tested vehicle; The static pressure transmission device in the test equipment is placed in the cabin of the tested vehicle.

9. A vehicle ventilation volume testing method based on the vehicle ventilation volume testing system according to claim 8, characterized in that: The method comprises: The air volume of the air conditioning system of the tested vehicle under the first simulated working condition is obtained by using the whole vehicle ventilation volume test equipment as the total air volume in the vehicle, wherein the first simulated working condition is a working condition when the blower operating state of the tested vehicle is the same as the blower operating state under the air volume test working condition after the air intake mode of the air conditioning system under the air volume test working condition is adjusted to the external circulation mode; The whole vehicle ventilation volume test device is used to obtain the in-vehicle air volume of the tested vehicle under a second simulated working condition as the in-vehicle air leakage volume, wherein the second simulated working condition is a working condition in which the air intake mode of the air conditioning system under the first simulated working condition is adjusted to an internal circulation mode, the blower is stopped, and the in-vehicle static pressure of the tested vehicle is the same as the in-vehicle static pressure under the first simulated working condition; The actual ventilation volume of the air-conditioning system during normal operation under the air volume test condition is determined according to the total air volume in the vehicle and the air leakage in the vehicle.

10. The method according to claim 9, characterized in that The total air volume in the vehicle is obtained by: When the air intake mode of the air conditioning system under the air volume test condition is adjusted to the external circulation mode, the power supply voltage output by the test device to the blower is adjusted according to the blower voltage required by the air volume test condition; By adjusting the rotation speed of the exhaust fan of the air volume table in the test equipment in the exhaust mode, the air volume flowing through the test equipment is adjusted until the current value of the blower measured by the test equipment reaches the blower current required by the air volume test condition, so that the air conditioning system of the vehicle under test operates under the first simulation condition; The current air volume measured by the test equipment is obtained as the total air volume in the vehicle.

11. The method according to claim 9 or 10, characterized in that The air leakage volume in the vehicle is obtained by the following method: When the air intake mode of the air conditioning system under the air volume test condition is adjusted to the internal circulation mode, the connection between the power supply end of the blower power supply system in the test equipment and the power supply end of the blower power supply system is cut off to control the blower to stop running; By adjusting the working mode and speed of the exhaust fan of the air volume table in the test equipment, the air volume flowing through the whole vehicle ventilation test equipment is adjusted until the static pressure inside the vehicle measured by the test equipment is the same as the static pressure inside the vehicle under the first simulated working condition, so that the tested vehicle is placed under the second simulated working condition, and the working mode includes an exhaust mode or a blast mode; The current air volume measured by the test equipment is obtained as the air leakage volume in the vehicle.

12. The method according to claim 10, characterized in that The blower voltage and the blower current are determined by: Switching the power supply mode of the blower power supply system in the test equipment to the vehicle power supply mode; Closing the electric damper of the air volume collecting device in the test equipment; When the air conditioning system is operated under the air volume test condition, determining the rotation speed of the blower based on the vibration signal of the blower measured by the test equipment; When the rotation speed of the blower reaches the blower rotation speed required by the air volume test condition, the current value of the blower measured by the test equipment is used as the blower current, and the voltage value of the blower measured by the test equipment is used as the blower voltage.

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