Vehicle ventilation volume testing device, system and vehicle ventilation volume testing method

Abstract

The application provides a whole vehicle ventilation volume testing device, system and whole vehicle ventilation volume testing method, relates to the field of vehicles, and utilizes the air volume collecting device to perform gas transmission between the air volume table and the vehicle cabin of the measured vehicle, so that the air volume table tests the gas flow of the vehicle cabin space, provides direct current power supply function for the measured vehicle through the power supply interface and the blower power supply system of the air volume table, realizes the testing function of the blower current through the current collecting interface and the blower power supply system of the air volume table, and realizes the testing function of the static pressure of the vehicle cabin through the static pressure collecting interface and the static pressure transmission device of the air volume table. The testing method can measure the total air volume and the air leakage volume of the air conditioning system when the air conditioning system works in any mode through the testing device, so that the actual ventilation volume of the air conditioning system in any mode is accurately measured, without the need of setting a tool for each ventilation opening. The testing device is more convenient to use, and the whole vehicle air volume can be obtained more quickly.

Description

TECHNICAL FIELD

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

[0002] Whole-vehicle ventilation volume testing is an important parameter in the research of whole-vehicle thermal comfort, defrosting and defogging performance and air conditioning system NVH performance, and can be specifically divided into whole-vehicle ventilation volume under any air outlet mode, internal and external circulation mode or mixed mode of a vehicle-mounted air conditioning system. Rapid, convenient and accurate testing of ventilation volume is of great significance to the research in various related fields.

[0003] External circulation ventilation volume is currently indirectly measured by the method of whole-vehicle PQ curve, which is mature, reliable and convenient. Internal circulation ventilation volume is a difficulty in ventilation volume testing, and is currently tested by corresponding tooling for each air outlet under internal circulation mode, and then summed up. However, this method requires tooling for each air outlet of each tested vehicle, which is high in tooling cost and long in cycle. Each air outlet must be tested separately, and the testing process is complicated. Moreover, the flow field near the air outlet will change after the testing tooling is connected, which may affect the testing accuracy. In addition, the ventilation volume of each air outlet is usually low, and the error is large when tested separately. The error of each air outlet testing is accumulated in the process of summing up the ventilation volume, resulting in a large error in the final measurement result, which cannot meet the needs of some high-precision testing scenarios.

[0004] Therefore, how to conveniently and accurately complete the testing of whole-vehicle ventilation volume under any air conditioning mode has become a problem to be solved. SUMMARY

[0005] Therefore, it is necessary to provide a whole-vehicle ventilation volume testing device, system and whole-vehicle ventilation volume testing method to conveniently and accurately complete the testing of whole-vehicle ventilation volume under any air conditioning mode.

[0006] A whole-vehicle ventilation volume testing device comprises a ventilation volume platform, a blower power supply system, a ventilation volume collecting device and a static pressure transmission device. The ventilation volume platform 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 in communication with a vehicle cabin space of a tested vehicle through the ventilation volume collecting device. The power supply interface is connected with a power supply end of the blower power supply system, and the current collection interface is connected with a current collection end of the blower power supply system. The power supply end of the blower power supply system is used for connecting a voltage input end of a 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 for being placed in the vehicle cabin space to transmit the static pressure of the vehicle cabin space.

[0007] In the embodiment of the present application, the air volume collecting device comprises a sealing plate and an air volume conveying pipe; the sealing plate is used to be connected with the window frame of the target vehicle window in the vehicle to be tested; the sealing plate is provided with a ventilation opening, one end of the air volume conveying pipe is communicated with the ventilation opening, and the other end of the air volume conveying pipe is communicated with the air inlet of the air volume table; the ventilation opening of the sealing plate is communicated with the vehicle cabin space of the vehicle to be tested.

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

[0009] In the embodiment of the present application, the air blower power supply system comprises a current clamp; the clamp jaw of the current clamp is used to pass through the conductive wire connected with the power supply end of the air blower power supply system; and the conductive end of the current clamp is used as the current collection end of the air blower power supply system.

[0010] In the embodiment of the present application, the power supply end of the air blower power supply system comprises a first power supply end connected with the power supply interface of the air volume table and a second power supply end used to connect the vehicle-mounted power supply end of the vehicle to be tested; the air blower power supply system further comprises 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 air blower power supply system; and 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 air blower power supply system.

[0011] In the embodiment of the present application, the static pressure transmission device comprises a static pressure test cylinder and a static pressure pipe; the static pressure test cylinder is provided with a through hole on the cylinder body; one end of the static pressure pipe is communicated with the inner space of the static pressure test cylinder, and the other end of the static pressure pipe is communicated with the static pressure collection interface of the air volume table.

[0012] In the embodiment of the present application, the device further comprises a vibration sensor, and the air volume table further comprises a vibration sensor interface; the vibration sensor interface is connected with the vibration sensor; and the vibration sensor is used to be arranged on the air blower to collect the air blower vibration signal.

[0013] A whole vehicle air volume test system, comprising a vehicle to be tested and a whole vehicle air volume test device according to any one of the above embodiments; the air inlet of the air volume table in the test device is communicated with the vehicle cabin space of the vehicle to be tested through the air volume collecting device of the test device; the power supply end of the air blower power supply system in the test device is connected with the voltage input end of the air blower in the vehicle to be tested; and the static pressure transmission device in the test device is placed in the vehicle cabin of the vehicle to be tested.

[0014] A vehicle ventilation volume test method based on the vehicle ventilation volume test system, the method comprising: obtaining, by the vehicle ventilation volume test device, the air volume of the air conditioning system of the vehicle under a first simulated working condition as the total air volume in the vehicle, the first simulated working condition being a working condition in which the air conditioning system of the vehicle is adjusted to the external circulation mode from the air volume test working condition, and the running state of the air blower of the vehicle is the same as that in the air volume test working condition; obtaining, by the vehicle ventilation volume test device, the air volume of the vehicle under a second simulated working condition as the air leakage volume in the vehicle, the second simulated working condition being a working condition in which the air conditioning system of the vehicle is adjusted to the internal circulation mode from the first simulated working condition, and the air blower is stopped, and the static pressure in the vehicle is the same as that in the first simulated working condition; and determining the actual ventilation volume of the air conditioning system under the normal running state of the air volume test working condition according to the total air volume in the vehicle and the air leakage volume in the vehicle.

[0015] In the embodiments of the present application, the total air volume in the vehicle is obtained by: when the air conditioning system is adjusted to the external circulation mode from the air volume test working condition, adjusting the power supply voltage output by the test device to the air blower according to the required air blower voltage of the air volume test working condition; adjusting the air volume flowing through the test device by adjusting the rotating speed of the air volume table blower in the air extraction mode until the current value of the air blower measured by the test device reaches the required air blower current of the air volume test working condition, so that the air conditioning system of the vehicle runs in the first simulated working condition; and obtaining the current air volume measured by the test device as the total air volume in the vehicle.

[0016] In the embodiments of the present application, the air leakage volume in the vehicle is obtained by: when the air conditioning system is adjusted to the internal circulation mode from the air volume test working condition, cutting off the connection between the power supply end of the air blower power supply system of the test device and the power supply end of the air blower power supply system to control the air blower to stop running; adjusting the air volume flowing through the vehicle ventilation test device by adjusting the working mode and rotating speed of the air volume table blower, until the static pressure value in the vehicle measured by the test device is the same as that in the first simulated working condition, so that the vehicle is in the second simulated working condition, the working mode including the air extraction mode or the air blowing mode; and obtaining the current air volume measured by the test device as the air leakage volume in the vehicle.

[0017] In the embodiment of the present application, the blower voltage and the blower current are determined in the following manner: the power supply mode of the blower power supply system in the test device is switched to the vehicle power supply mode; the electric damper of the air volume collection device in the test device is closed; when the air conditioning system operates in the air volume test working condition, the rotational speed of the blower is determined based on the vibration signal of the blower measured by the test device; when the rotational speed of the blower reaches the required rotational speed of the blower in the air volume test working condition, the current value of the blower measured by the test device is taken as the blower current, and the voltage value of the blower measured by the test device is taken as the blower voltage.

[0018] In summary, the test device, system and method for testing the total air volume of a vehicle according to the present application utilize the air volume collection device to transfer gas between the air volume table and the cabin of the vehicle to be tested, so that the air volume table tests the gas flow of the cabin space. The test device provides direct current power supply function to the vehicle to be tested through the power supply interface and the blower power supply system of the air volume table, realizes the test function of the blower current through the current collection interface and the blower power supply system of the air volume table, and realizes the test function of the cabin static pressure through the static pressure collection interface and the static pressure transmission device of the air volume table. The power supply function and the current collection function of the test device are used 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 in the actual operating condition of the air conditioning system. Then, the air volume test function of the test device and the static pressure collection function of the test device are used to obtain the air volume in the vehicle and the cabin static pressure in the normal working state of the air conditioning system, and the air volume in the vehicle is measured when the cabin static pressure is restored to the static pressure in the normal working state of the air conditioning system by the air extraction and air supply functions of the air volume table, which is taken as the air leakage of the cabin. Therefore, the total air volume and the air leakage of the air conditioning system in any mode can be measured by the test device according to the present application, so that the actual air volume of the air conditioning system in any mode can be accurately measured, and there is no need to set a tool for each air outlet. The test device is more convenient to use and can obtain the actual air volume of the vehicle more quickly and accurately. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0020] Figure 1 FIG. 1 is a structural schematic diagram of a test system for total air volume of a vehicle according to an exemplary embodiment of the present application;

[0021] Figure 2 is a structural schematic diagram of a wind volume platform in a full vehicle ventilation volume test device according to an example embodiment of the present application;

[0022] Figure 3 is a structural schematic diagram of a wind volume collecting device in a full vehicle ventilation volume test device according to an example embodiment of the present application;

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

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

[0025] Figure 6 is a flow chart of a full vehicle ventilation volume test method according to an example embodiment of the present application;

[0026] Figure 7 is a flow chart of a full vehicle ventilation volume test method according to another example embodiment of the present application;

[0027] Figure 8 is a flow chart of a full vehicle ventilation volume test method according to another example embodiment of the present application;

[0028] Figure 9 is a flow chart of a full vehicle ventilation volume test method according to another example embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments of the present application. The embodiments described by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

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

[0031] It should also be understood that, in the description of the application and the appended claims, the term "and / or" is used to mean one or more of the associated listed items, as well as the sum of all possible combinations of the associated listed items. It should also be understood that, in the description of the application and the appended claims, the term "comprises" or "comprising" or "includes" or "including" is used to mean one or more of the associated items, as well as the sum of all possible combinations of the associated items.

[0032] As used in the description of the application and the appended claims, the term "if' can be interpreted as meaning "when" or "once" or "in response to a determination" or "in response to a detection" depending on the context. Similarly, the phrase "if determined" or "if detected [the recited condition or event]" can be interpreted as meaning "once determined" or "in response to a determination" or "once detected [the recited condition or event]" or "in response to a detection [the recited condition or event]" depending on the context.

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

[0034] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "comprise", "comprising", "have", "having", "include", "including", and "contain", "containing" or variants thereof, mean "including but not limited to", unless otherwise specified.

[0035] As Figures 1-5 As shown, the full-vehicle ventilation volume test equipment 1 can include, but is not limited to, a wind volume platform 2, a blower power supply system 3, a wind volume collection device 4, and a static pressure transmission device 5, etc.

[0036] The wind volume platform 2 can 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, etc.

[0037] The blower power supply system 3 can include, but is not limited to, a power supply end 31, a current collection end 32, and a power supply end 33, etc.

[0038] The air volume table 1 is provided with a nozzle differential pressure type air volume table body, which is arranged between the air inlet 21 and the air outlet 22, and 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 direct current stabilized power supply, a direct current ammeter, a static pressure sensor and the like. These devices provide power supply function, current collection function, static pressure collection function and the like through the interfaces arranged 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 in communication with the vehicle cabin space of the measured vehicle through the air volume collection device 4, which can be understood as providing a gas transmission channel for the vehicle cabin space and the air volume table 1.

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

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

[0043] The test device 1 for testing the whole vehicle air volume can transmit the gas in the vehicle cabin space to the air volume table 2 through the air volume collection device 4. 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 test device 1 can collect the static pressure in the vehicle cabin in real time through the static pressure collection interface. The test device 1 can provide direct current stabilized power to the blower in the measured vehicle through the power supply interface to drive the blower to rotate. During the operation of the blower in the measured vehicle, the test device can test the current of the blower in the measured vehicle through the current collection interface.

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

[0045] The voltage value output through the power supply interface and the current value collected through the current collection interface are used to determine the power of the blower, so that the blower operates at the power required by a certain mode of the air conditioning system, and the working condition of the air conditioning system during the test of the total air volume in the vehicle is the same as the working condition of the air conditioning system during actual operation in a certain mode. The static pressure value of the air conditioning system during actual operation in a certain mode is determined by using the static pressure collection interface, and the current air volume is tested by using the air volume table. Then, after the air conditioning system stops working, the air pressure in the vehicle cabin is adjusted by using the air volume table to simulate the static pressure value in the vehicle cabin during operation of the air conditioning system, and the air leakage at this time is tested.

[0046] In summary, the test device for the total air volume of the vehicle provided by the present application uses the air volume collection device to transmit gas between the air volume table and the vehicle cabin of the vehicle to be tested, so that the air volume table tests the gas flow of the vehicle cabin space. The test device provides direct current power supply function to the vehicle to be tested 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 static pressure of the vehicle cabin through the static pressure collection interface of the air volume table and the static pressure transmission device. The present application adjusts the operating state of the blower by using the power supply function and the current collection function of the test device, so that the test working condition is the same as the actual working condition of the air conditioning system. Then, by using the air volume test function of the test device and the static pressure collection function of the test device, the air volume and the static pressure of the vehicle cabin under the normal working state of the air conditioning system are obtained, and the static pressure of the vehicle cabin is restored to the static pressure during the normal working of the air conditioning system by using the air extraction and air blowing functions of the air volume table when the air conditioning system stops working, and the air volume in the vehicle at this time is measured as the air leakage of the vehicle cabin. The total air volume and the air leakage of the air conditioning system during operation in any mode can be measured by using the test device provided by the present application, so that the actual ventilation of the air conditioning system in any mode can be accurately measured, and there is no need to set a tool for each ventilation port. The test device is more convenient to use and can obtain the total air volume of the vehicle more quickly.

[0047] On the basis of the above embodiment, as shown in Figure 3 The air volume collection device 4 can include a sealing plate 41 and an air volume conveying pipe 42.

[0048] The air volume conveying pipe 42 communicates with the air inlet 22 of the air volume table 1 at one end, and communicates with the ventilation port 43 in the sealing plate 41 at the other end.

[0049] The sealing plate 41 matches the window frame of the target window in the vehicle to be tested, for example, the shape of the sealing plate 41 is the same as that of the driver's seat window, and the sealing plate 41 can be embedded in the window frame of the driver's seat after the driver's seat window is completely lowered. During the air volume test, the windows at other positions are raised, so that the gas in the vehicle cabin is transmitted to the air volume table through the ventilation port on the sealing plate, and the leakage of the gas in the vehicle cabin does not affect the test result of the air volume.

[0050] In addition, the sealing plate 41 can also be provided with an electrically operated air door 44 matched with the air vent. When the air volume in the vehicle needs to be tested, the electrically operated air door 44 is opened, and before the air volume test, the electrically operated air door 44 is closed to maintain the sealing of the vehicle window in the actual use.

[0051] The control end of the electrically operated air door can be connected with the controller in the air volume station through a signal line, or an operation button is arranged on the air volume station, and the signal line is connected with the operation button.

[0052] For example, the air volume collecting device is a connecting device of the air volume station and the vehicle body, which guides the air volume in the vehicle into the air volume station to test the air volume. It is connected by the sealing plate with similar shape and the front side window glass of the vehicle through cloth-based glue and the sealing connection of the front door side window of the vehicle, and then the corresponding front side window glass of the vehicle is lowered, that is, the connection is completed. The sealing plate is connected with the air volume station through a flexible corrugated air pipe with a diameter of about 15 cm. The sealing plate is also provided with an electrically operated air door, which can open or close the air vent on the air volume collecting device according to different modes of the device.

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

[0054] In some embodiments, the clamping ring of the current clamp 34 is sleeved on the conductive wire in communication with the power end 31 of the blower power supply system 3. The clamping ring of the current clamp 34 can be sleeved on the external conductive wire connected with the power end 31, for example, the clamping ring of the current clamp 34 is sleeved on the conductive wire connected between the power end 31 and the power supply interface 23 of the air volume station; or the clamping ring of the current clamp 34 is sleeved on the internal conductive wire connected with the power end 31, for example, the clamping ring of the current clamp 34 is sleeved on the conductive wire connected between the power end 31 and the power supply end 33.

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

[0056] The current clamp is used to realize the non-contact collection of the current of the blower.

[0057] The power end 31 of the blower power supply system can include a first power end and a second power end; the first power end is connected with the power supply interface of the air volume station 1; and the second power end is used to connect the on-board power supply end of the vehicle to be tested, which can be understood as the power supply end for supplying power to the blower in the vehicle.

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

[0059] ​The power distribution device can be used to control the connection of the first end and the third end of the power distribution device, so as to transmit the voltage output by the air volume table to the voltage input end of the vehicle blower of the vehicle under test to power the blower, which can be expressed as an air volume table power supply mode; or the second end and the third end are connected, so as to transmit the voltage output by the vehicle power supply end of the vehicle under test to the voltage input end of the vehicle blower of the vehicle under test to power the blower, which can be expressed as a vehicle power supply mode.

[0060] In some embodiments, in addition to outputting a direct current voltage when the blower needs to be powered, the power supply interface of the air volume table 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 direct current voltage stabilizing power supply module in the air volume table is disconnected, and the voltage test branch responsible for voltage test is in operation. In this case, the power supply interface of the air volume table is equivalent to a voltage test interface. The first end and the third end of the power distribution device are also connected, so that the power supply interface of the air volume table is connected between the vehicle power supply end and the voltage input end of the blower, and the voltage test function of the power supply interface of the air volume table is used to test the terminal voltage of the blower.

[0061] The switching of the connection relationship of each end of the power distribution device can be achieved by leading out 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. Alternatively, the other end of the control line is connected to the pin of the controller.

[0062] For example, the power distribution device is connected to the motor connector of the blower 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 supply line and connects it to the direct current voltage stabilizing power supply on the air volume table. An ammeter is externally hung on the power supply line for non-contact measurement of the current of the blower, and the body of the ammeter corresponding to the ammeter is placed in the air volume table.

[0063] The present application realizes the switching between the air volume table power supply mode and the vehicle power supply mode by arranging the power distribution device in the blower power supply system, so as to facilitate the flexible switching of the power supply of the blower after the test equipment is connected to the vehicle under test, and to restore the blower to the running state under the vehicle power supply environment without the need to dismount the test equipment from the vehicle under test, thereby providing convenience for the entire air volume test process.

[0064] On the basis of the above-mentioned embodiments, as shown in Figure 5 The static pressure transmission device 5 can include but is not limited to a static pressure test cylinder 51 and a static pressure pipe 52.

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

[0066] For example, the through holes can be arranged uniformly and densely on the barrel body. It should be noted that the number, size and distribution of the through holes can be set as required, and the application does not make any limitation.

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

[0068] For example, the static pressure transmission device 5 in the application can be composed of a static pressure test barrel 51 responsible for sensing static pressure and a static pressure pipe 52 connecting the test barrel and the sensor. During testing, the static pressure pipe 52 passes through the door gap, and the test barrel 51 is placed on the rear seat in the sealed vehicle cabin. The test barrel 51 has densely small holes that open uniformly in all directions to ensure that the pressure of the wind can be offset by the windward and windward small holes, so as to measure the accurate static pressure.

[0069] The application utilizes the static pressure transmission device to transmit the static pressure in the vehicle to the air volume table for measurement, without the need to set a test tool in the vehicle cabin to perform the test operation in the vehicle cabin. All test processes and operation processes can be implemented on the air volume table operation panel, thereby simplifying the complicated equipment setting and test process.

[0070] On the basis of the above-mentioned embodiments, the test equipment 1 can further include a vibration sensor, and the air volume table can further include a vibration sensor interface 26.

[0071] The vibration sensor interface 26 is connected with the vibration sensor.

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

[0073] The air volume table can be used to determine the rotation speed of the air blower according to the collected vibration signal.

[0074] For example, a vibration sensor data acquisition device (referred to as vibration sensor data acquisition) is arranged in the air volume table. The vibration sensor data acquisition device is connected with the vibration sensor through the vibration sensor interface, supplies power for the vibration sensor and acquires the vibration signal collected by the vibration sensor. The vibration sensor device is connected with the controller in the air volume table, transmits the vibration acceleration corresponding to the vibration signal to the controller, and the controller stores a relationship expression between the vibration acceleration and the rotation speed of the air blower motor, so that the controller can calculate the current rotation speed of the air blower motor, or directly express the rotation speed of the air blower.

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

[0076] The application also provides a whole vehicle ventilation volume testing system, which comprises a vehicle to be tested 6 and the whole vehicle ventilation volume testing device 1 according to any one of the above embodiments. Figure 1 As shown in the figure, the sealing plate of the air volume collecting device in the testing device 1 is tightly combined with the window frame of the window at the driver's position in the vehicle to be tested 2.

[0077] The power supply end of the blower fan power supply system 3 in the testing device 1 is connected with the voltage input end of the blower fan in the vehicle to be tested.

[0078] The static pressure transmitting device is placed in the cabin of the vehicle to be tested.

[0079] In this way, the air volume flowing in the cabin of the vehicle to be tested can be transmitted to the air volume table by the testing device for air volume testing, the static pressure in the cabin can be transmitted to the air volume table by the static pressure transmitting device for static pressure testing, the end voltage of the blower fan can be controlled by the power supply of the blower fan, and the current of the blower fan can be monitored by the current collection end in the blower fan power supply system, so as to monitor the running state of the blower fan during the air volume testing and the static pressure testing, thereby obtaining the ventilation volume and the back pressure of the blower fan under the specified running state.

[0080] For example, the air volume table can be understood as the assembly body of the whole vehicle ventilation volume testing device, which is composed of the traditional nozzle differential pressure air volume table and the hardware added by the application. For example, the added hardware can include:

[0081] The direct current stabilized power supply is connected with the blower fan power supply system through the power supply line, provides power and control signals of the blower fan rotating speed, and measures the power supply voltage of the blower fan;

[0082] The direct current ammeter is the body of the non-contact current meter, is connected with the current clamp in the blower fan power supply system through the signal line, and is used for measuring the current of the blower fan under the vehicle power supply mode and the air volume table power supply mode;

[0083] The vibration sensor data acquisition has the functions of supplying power to the vibration sensor and collecting the vibration voltage signal, and is connected with the vibration sensor through the signal line;

[0084] The signal processing software is built in the computer system of the air volume table, can convert the vibration sensor signal into the rotating speed signal, and displays the signal on the screen of the air volume table;

[0085] The static pressure sensor 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, is connected with the static pressure testing cylinder through the static pressure tube, and is used for testing the air pressure in the vehicle;

[0086] In addition, the air volume collecting device is connected with one window of the whole vehicle through the butyl rubber, is adhered to the outside of the window and is kept sealed, and the window is always in the lowered state during the testing;

[0087] The power distribution module of the blower power supply system is connected with the blower connector on the vehicle HVAC (heating ventilation air conditioning system), and the module is connected with the blower power supply end of the vehicle, and the current clamp is used to test the current by crossing the power supply line of the blower power supply system and the vehicle power supply line.

[0088] The static pressure pipe connects the static pressure test cylinder in the vehicle and the static pressure sensor of the air volume platform through the gap of the vehicle door, the static pressure test cylinder is fixed on the rear seat, and the static pressure is prevented from being blown by the airflow of the air outlet of the air conditioner to improve the test accuracy.

[0089] The application also provides a method for testing the total air volume of a vehicle based on the total air volume testing system shown in the above embodiment, as shown in the figure, the method comprises the following steps: Figure 6

[0090] S601, obtaining the air volume of the air conditioning system of the measured vehicle under a first simulated working condition as the total air volume in the vehicle by using the total air volume testing device, the first simulated working condition is a working condition in which the air volume testing working condition is adjusted to an external circulation mode, and the running state of the blower of the measured vehicle is the same as that in the air volume testing working condition.

[0091] S602, obtaining the air volume of the measured vehicle under a second simulated working condition as the air leakage in the vehicle by using the total air volume testing device, the second simulated working condition is a working condition in which the air inlet 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 static pressure in the vehicle is the same as that in the first simulated working condition.

[0092] S603, determining the actual air volume of the air conditioning system under the normal running condition of the air volume testing working condition according to the total air volume in the vehicle and the air leakage in the vehicle.

[0093] The air volume testing working condition can be understood as the running condition of the air conditioning system of the measured vehicle under different working modes or different functions, for example, the air volume testing working condition can be the working condition of the air conditioning system under different air volume gears, and / or different air outlet modes, and / or different air inlet modes, such as full cold air blowing internal circulation 8 gears, full cold air blowing foot external circulation 8 gears, and the like.

[0094] In the process of air volume testing, the total air volume in the vehicle and the air leakage are tested by the total air volume testing device.

[0095] ​For example, the air volume test condition currently required for air volume testing is the running condition of the air conditioning system under full cold face-in-circulation 8th gear. When testing the total air volume in the vehicle, the air conditioning system is first adjusted to the outside circulation mode under the air volume test condition, while other modes remain unchanged except the air inlet mode. Then the speed, current and voltage of the blower are adjusted to the same as the air volume test condition. The total air volume in the vehicle is then tested by using the total air volume testing device. When testing the air leakage in the vehicle, the air conditioning system is first adjusted to the inside circulation mode under the air volume test condition, while other modes remain unchanged except the air inlet mode. Then the blower is stopped, and the static pressure in the vehicle is adjusted to the same as the total air volume, or the static pressure in the vehicle is adjusted to the same as the air volume test condition. The air leakage in the vehicle is then tested by using the total air volume testing device.

[0096] It is understood that the outside circulation mode is to suck fresh air from outside the vehicle and send it into the vehicle after being processed by the air conditioning system. The inside circulation mode is to circulate the air in the vehicle without introducing fresh air from outside.

[0097] The test of the total air volume in the vehicle of the present application is to obtain the air volume of the blower under the above air volume test condition. Whether in the inside circulation mode or the outside circulation mode, the air blown out of the air outlet has to pass through the blower. In the inside circulation mode, the air in the vehicle cabin exchanges with the air outside, so the total air volume in the vehicle cannot well represent the air volume of the blower. Therefore, when testing the air volume of the blower, the air inlet mode of the air conditioning system is set to the outside circulation mode, and the air outside the vehicle is sent into the vehicle, which corresponds to pushing the air in the vehicle to pass through the air volume collecting device in the testing device to the air volume table, so the air volume measured by the air volume table can represent the air volume of the blower.

[0098] In the inside circulation mode, the air exchange channel between the inside and outside of the vehicle is closed, the air flow in the vehicle does not circulate when the blower is closed, and the air flow only comes from the inside of the vehicle when the blower is opened, forming the air circulation in the vehicle. When testing the air leakage in the vehicle, the air inlet mode of the air conditioning system is set to the inside circulation mode, and the air exchange channel between the inside and outside of the vehicle is closed. In this case, the air volume measured by the air volume table can represent the air volume flowing into or overflowing from the gaps of the doors, windows and pressure relief valves, i.e. the air leakage in the vehicle.

[0099] The actual air volume in the vehicle, i.e. the actual air volume of the blower or the actual air volume of the air outlet of the air conditioning system under the above air volume test condition, is calculated according to the measured total air volume in the vehicle and the air leakage in the vehicle.

[0100] On the basis of the above embodiment, as shown in Figure 7 the total air volume in the vehicle is tested by the following method:

[0101] S701, when the air conditioning system in the air volume test condition of the air intake mode adjustment to the outside circulation mode, according to the air volume test condition required by the blower voltage, adjust the test equipment to the blower output power supply voltage;

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

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

[0104] The blower voltage and blower current required by the air volume test condition are the terminal voltage and terminal current of the blower when the air conditioning system runs in the air volume test condition.

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

[0106] The voltage applied to the blower during the total air volume test is the same as the terminal voltage of the blower when the blower actually runs in the air volume test condition, so the speed should be the same in the two cases.

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

[0108] For example, the air in the vehicle cabin is extracted by the exhaust fan of the air volume table in the test equipment, so that the air pressure in the vehicle cabin is reduced, and under the action of the internal and external pressure difference, the gas flow delivered to the vehicle cabin by the blower increases, and the power of the blower increases. In the case of fixed blower voltage, the blower current increases. The application adjusts the speed of the exhaust fan of the air volume table in the test equipment in the exhaust mode, adjusts the gas pressure in the vehicle cabin, and correspondingly adjusts the air flow through the blower and the air flow through the test equipment. When the blower current also reaches the blower current required by the air volume test condition, the blower power and speed are the same as the air volume test condition, so it can be considered that the current ventilation of the blower is equal to the ventilation of the blower in the air volume test condition.

[0109] Therefore, the total air volume in the vehicle is taken as the air volume measured by the air volume table when the blower current, the blower voltage and the blower speed of the blower meet the requirements of the air volume test working condition.

[0110] On the basis of the above embodiment, as shown in Figure 8 The air leakage in the vehicle can be tested in the following manner:

[0111] S801, when the air intake mode of the air conditioning system under the air volume test working 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;

[0112] S802, the air volume flowing through the whole vehicle ventilation test equipment is adjusted by adjusting the working mode and speed of the air extraction fan in the air volume table in the test equipment, until the static pressure value measured by the test equipment is the same as the static pressure in the vehicle under the first simulated working condition, so that the vehicle under test is under the second simulated working condition, and the working mode includes the air extraction mode or the air blowing mode;

[0113] S803, the current air volume measured by the test equipment is taken as the air leakage 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 in the vehicle is tested, the DC stabilized power supply in the air volume table is turned off, the working mode and speed of the air extraction 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 in the vehicle is tested, the DC stabilized power supply in the air volume table is turned off, and the power supply to the blower is stopped, at this time the blower stops running, the static pressure in the vehicle is obtained through the static pressure collection interface of the air volume table, if the static pressure in the vehicle is lower than the static pressure value corresponding to the total air volume in the vehicle, the air extraction fan extracts air in the vehicle, the speed of the air extraction fan can be adjusted according to the difference between the current static pressure in the vehicle and the static pressure value corresponding to the total air volume in the vehicle, until the static pressure in the vehicle collected by the static pressure collection interface reaches the static pressure value corresponding to the total air volume in the vehicle; if the static pressure in the vehicle is higher than the static pressure value corresponding to the total air volume in the vehicle, the air extraction fan blows air into the vehicle cabin, the speed of the air extraction fan can be adjusted according to the difference between the current static pressure in the vehicle and the static pressure value corresponding to the total air volume in the vehicle, until the static pressure in the vehicle collected by the static pressure collection interface reaches the static pressure value corresponding to the total air volume in the vehicle.

[0116] The application tests the air volume under the condition that the air conditioning system is in the internal circulation mode, the air exchange channel is closed, the air blower stops running, and the static pressure value in the vehicle reaches the static pressure when the air blower runs under the air volume test working condition. The air volume is tested under this condition, and the air volume is the air volume leaked from the vehicle under the air volume test working condition when the air blower runs.

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

[0118] In some embodiments, the corresponding relationship between the air volume of the air blower and the static pressure in the vehicle can also be calibrated in advance, so that after obtaining the total air volume in the vehicle 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 application combines the static pressure collection function and the current collection function of the test equipment, the air volume test function of the air volume test bench, and the air extraction and air blowing function of the air volume test bench to restore the static pressure state of the vehicle cabin under the actual running working condition of the air conditioning system. Then, the air leakage in the vehicle is obtained by using the air volume in the vehicle under this state, the test process is convenient, and it is applicable to multiple different air volume test working conditions, and has wider applicability.

[0120] On the basis of the above embodiments, as Figure 9 shown, the air blower voltage in the above step S701 and the air blower current in the above step S702 can be determined by the following method:

[0121] S901, switching the power supply mode of the air 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 runs under the air volume test working condition, determining the rotating speed of the air blower based on the vibration signal of the air blower measured by the test equipment.

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

[0125] The power distribution device in the blower power supply system in the test equipment is set in the vehicle power supply mode, the voltage input end of the blower starts to operate after being connected with the vehicle power supply end.

[0126] The power supply function of the direct current voltage stabilizing power supply in the air volume table is closed, the voltage acquisition function is opened, and the voltage of the blower is acquired by using the power supply interface on the air volume table.

[0127] The electric damper of the air outlet on the air volume collection device can be closed to restore the air-tightness of the vehicle cabin during the actual operation of the air conditioning system under the condition that the blower current and the blower voltage are acquired under the air volume test working condition. The electric damper can be opened when the total air volume in the vehicle and the air leakage volume in the vehicle are tested by using the air volume table, so that the air in the vehicle flows into the air volume table.

[0128] The vibration sensor acquisition device in the air volume table is controlled to start working, to supply power to the vibration sensor arranged on the blower, and to acquire the vibration signal of the blower. The corresponding blower speed is calculated according to the vibration signal by using the rotation speed calculation program stored in the air volume table controller.

[0129] When the blower speed reaches the blower speed required by the air volume test working condition, the current value acquired by the current acquisition interface of the air volume table in the test equipment is taken as the blower current in the above step S702, and the voltage value acquired by the power supply interface of the air volume table in the test equipment is taken as the blower voltage in the above step S701.

[0130] In this way, the blower voltage, the blower current required by the air volume test working condition, and the current acquisition and voltage acquisition devices during the total air volume test and the air leakage volume test are unified, the error is reduced, and the function of the test equipment is improved.

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

[0132] In order to facilitate the understanding of the whole vehicle air volume test method proposed in the present application, the complete process of testing the whole vehicle air volume by using the whole vehicle air volume test system will be illustrated as follows:

[0133] The present application can be used to quickly measure the whole 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 information of the blower under the test air volume condition. According to the test air volume condition, close the electric valve of the air volume collection device, adjust the power distribution device to the vehicle power supply, open the end voltage test function of the DC voltage stabilizer, the current test function of the non-contact ammeter and the rotating speed test function of the vibration sensor. Then adjust the vehicle to the air volume gear, the mixed mode, the air outlet mode and so on which need to be tested. Record the voltage, current and rotating speed of the blower under each air volume test condition.

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

[0137]

[0138] Table 1 The blower information table recorded according to the air volume test condition

[0139] (2) Adjust the static pressure in the vehicle (the back pressure of the blower) to make the blower at the same voltage, current and rotating speed as in step 1, and measure the total air volume at this time. Specifically, open the electric damper on the air volume collection device, adjust the air inlet mode of the HVAC (air conditioning system) in the vehicle to the external circulation, and keep other modes unchanged. Adjust the power distribution device to the air volume table power supply. Open the DC voltage stabilizer, static pressure sensor and air volume test function on the air volume table, and adjust to the same blower end voltage as in step 1. At this time, the blower starts to work, and the rotating speed value is also the same as in step 1. However, since the air flow path and its pressure loss through the air volume table under the external circulation mode may be different from that in step 1, the current of the blower may be different from that in step 1. In view of this situation, open the air extractor on the air volume table to extract negative pressure in the vehicle to be tested, at this time, the current of the blower will increase and approach the current in step 1, and the total negative pressure in the vehicle measured at this time will also increase. Adjust the rotating speed of the air extractor on the air volume table to make the current of the blower exactly the same as in step 1 under the corresponding condition. Then it can be considered that the air volume flowing through the blower at this time is exactly the same as in step 1. Record the vehicle back pressure and the air volume read by the air volume table at this time. And make a table as shown in Table 2.

[0140]

[0141] Table 2 The blower current, vehicle static pressure and total air volume statistical table under the simulated air volume test condition

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

[0143]

[0144] Table 3 Corresponding table of static pressure and air leakage in vehicle under simulated air volume test working condition

[0145] (4) According to the simulated total air volume and air leakage under each working condition, the actual ventilation volume of the measured air conditioning system is obtained, as shown in the following Table 4:

[0146]

[0147] Table 4 Test result example table of total vehicle ventilation volume under each working condition

[0148] In summary, the application discloses a test equipment for quickly and simply measuring the total vehicle ventilation volume and an application method thereof. The advantages are that no separate tooling is needed for each air outlet, and no separate measurement is needed for each air outlet, and the air volume of the whole vehicle can be measured at one time. The equipment indirectly tests the total vehicle ventilation volume through the relationship between the electric power of the blower, the static pressure and the air volume, thereby saving the trouble of making air volume collection tooling for each air outlet, and 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. Especially for the air outlets which are located inward, flat in shape and difficult to make and connect the air volume collection tooling, the effect is more obvious, and the application has certain advancement and practical value.

[0149] Overall, the present application has the following beneficial effects compared with the prior art:

[0150] (1) The application can test the air volume under multiple double-layer flow or internal circulation modes at one time, which saves a lot of test time compared with the traditional method of testing the air volume of each air outlet separately and then adding them up, and improves the work efficiency.

[0151] (2) The application does not need to make matching air volume collection tooling for each air outlet when testing the air volume, thereby saving the tooling manufacturing time, materials and cost, reducing the test cost and improving the test efficiency.

[0152] (3) The application avoids the change of the outflow field outside the air outlet caused by the tooling connected to the air outlet when testing the air volume in the internal circulation mode, thereby obtaining better test accuracy.

[0153] (4) The application can test the air volume of double-layer flow mode, overcoming the shortcomings that the PQ curve method cannot measure the static pressure in the vehicle and the air outlet air volume collection method cannot obtain the static pressure of double-layer flow.

[0154] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the application.

Claims

1. A full vehicle ventilation volume test apparatus, characterized by, include: Air volume control unit, blower power supply system, air volume collection device and static pressure transmission device; The air volume meter includes an air inlet, an air outlet, a power supply interface, a current acquisition interface, and a static pressure acquisition interface; The air inlet is connected to the cabin space of the vehicle under test through the air volume collection device. The power supply interface is connected to the power supply terminal of the blower power supply system, the current acquisition interface is connected to the current acquisition terminal of the blower power supply system, and the power supply terminal of the blower power supply system is used to connect to the voltage input terminal of the blower in the vehicle under test. The static pressure acquisition interface is connected to the static pressure transmission device, which is used to be placed in the vehicle cabin space to transmit the static pressure of the vehicle cabin space. 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; 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 platform, and the vent of the sealing plate is connected to the cabin space of the vehicle under test. The static pressure transmission device includes: a static pressure test cylinder and a static pressure tube; the static pressure test cylinder has a through hole on its body; one end of the static pressure tube is connected to the internal space of the static pressure test cylinder, and the other end of the static pressure tube is connected to the static pressure acquisition interface of the air volume meter.

2. The apparatus of claim 1, wherein, An electric damper is provided on the sealing plate, which is used to close or open the ventilation openings provided on the sealing plate.

3. The apparatus of claim 1, wherein, The blower power supply system includes: a current clamp; The jaws of the current clamp are used to pass through the conductive wire connected to the power supply terminal of the blower power supply system. The conductive end of the current clamp serves as the current acquisition end of the blower power supply system.

4. The device as described in claim 1, characterized in that, The power supply terminal of the blower power supply system includes: a first power supply terminal connected to the power supply interface of the air volume meter, and a second power supply terminal for connecting to the on-board power supply terminal of the vehicle under test; the blower power supply system also includes: a power distribution device; The power distribution device is used to switch between the power supply mode of the air volume control unit and the power supply mode of the vehicle. In the power supply mode of the air volume table, the power distribution device is used to connect the first power supply terminal and the power supply terminal of the blower power supply system. In the vehicle power supply mode, the power distribution device is used to connect the second power supply terminal and the power supply terminal of the blower power supply system.

5. The device as described in claim 1, characterized in that, The device also includes a vibration sensor, and the air volume platform also includes a vibration sensor interface; The vibration sensor interface is connected to the vibration sensor; The vibration sensor is used to collect the vibration signal of the blower.

6. A system for testing the ventilation volume of a vehicle, characterized in that, include: The vehicle under test and the testing equipment for the total ventilation volume of the vehicle as described in any one of claims 1-5; The air inlet of the air volume table in the test equipment is connected to the cabin space of the vehicle under test through the air volume collection device of the test equipment. The power supply terminal of the blower power supply system in the test equipment is connected to the voltage input terminal of the blower in the vehicle under test. The static pressure transmission device in the testing equipment is placed inside the cabin of the vehicle under test.

7. A method for testing the total vehicle ventilation volume based on the testing system for total vehicle ventilation volume according to claim 6, characterized in that, The method includes: The air volume of the air conditioning system of the vehicle under test is obtained using a full vehicle ventilation volume test device under the first simulated working condition, which is used 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 test condition is adjusted to the external circulation mode, and the blower operating state of the vehicle under test is the same as the blower operating state under the air volume test condition. The air volume inside the vehicle under test is obtained using the full vehicle ventilation volume testing equipment under the second simulated working condition, which is used as the air leakage volume inside 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 the internal circulation mode, the blower is stopped, and the static pressure inside the vehicle under test is the same as the static pressure inside the vehicle under the first simulated working condition. Based on the total air volume inside the vehicle and the air leakage inside the vehicle, the actual ventilation volume of the air conditioning system when it is operating normally under the air volume test conditions is determined.

8. The method as described in claim 7, characterized in that, The total air volume inside the vehicle is obtained through the following methods: When the air intake mode of the air conditioning system is adjusted to the external circulation mode under the air volume test condition, 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. By adjusting the rotation speed of the exhaust fan in the air volume tester of the test equipment in 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 for the air volume test condition, so that the air conditioning system of the vehicle under test operates under the first simulated condition. The current air volume measured by the testing equipment is obtained as the total air volume inside the vehicle.

9. The method as described in claim 7 or 8, characterized in that, The air leakage rate inside the vehicle is obtained through the following methods: When the air intake mode of the air conditioning system is adjusted to the internal circulation mode under the air volume test condition, the connection between the power supply terminal of the blower power supply system in the test equipment and the power supply terminal 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 in the air volume tester of the test equipment, the air volume flowing through the test equipment for the whole vehicle ventilation 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 vehicle under test is under the second simulated working condition. The working mode includes exhaust mode or blower mode. The current air volume measured by the testing equipment is used as the air leakage volume inside the vehicle.

10. The method as described in claim 9, characterized in that, The blower voltage and the blower current are determined in the following manner: Switch the power supply mode of the blower power supply system in the test equipment to the vehicle power supply mode; Close the electric damper of the air volume collection device in the test equipment; When the air conditioning system is running under the air volume test condition, the speed of the blower is determined based on the vibration signal of the blower measured by the test equipment. When the speed of the blower reaches the speed required for the air volume test condition, the current value of the blower measured by the test equipment is taken as the blower current, and the voltage value of the blower measured by the test equipment is taken as the blower voltage.

Images