Air compressor test bench and test system

Abstract

The utility model discloses an air compressor test bench and a test system. The air compressor test bench comprises a first pipe body and a second pipe body, the first pipe body is used for being connected with the air inlet end of a to-be-tested air compressor, the second pipe body is used for being connected with the air outlet end of the to-be-tested air compressor, the first pipe body is provided with a first temperature measuring part, and the first temperature measuring part is used for installing a temperature measuring component to detect the temperature of the air inlet end of the to-be-tested air compressor. The second pipe body is provided with a second temperature measuring part, the second temperature measuring part is used for installing a temperature measuring part to detect the temperature of the air outlet end of the air compressor to be detected, and the side wall of the first pipe body and the side wall of the second pipe body are each at least provided with a first wall face and a second wall face in the circumferential direction. The first temperature measuring part and the second temperature measuring part are arranged on the first wall face of the corresponding pipe body so as to avoid the second wall face. The air compressor test bench disclosed by the utility model can measure the temperature of the air inlet and outlet ends of the air compressor, prevents the temperature measuring part from being collided and broken during operation, and reduces the maintenance cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel cells, and in particular relates to an air compressor test bench and a test system. Background Art

[0002] When testing a hydrogen fuel cell air compressor, it is necessary to collect data on the gas temperature at the air inlet and outlet of the air compressor.

[0003] In the related art, when testing an air compressor, the air inlet and outlet pipes need to be assembled at the air inlet and outlet ends of the air compressor. In order to prevent the temperature of the inlet and outlet pipe walls from being uneven due to uneven gas friction or processing differences, four temperature sensors at four angles are inserted into the temperature measuring holes, and then the average values ​​are calculated respectively. The calculated average values ​​are used in the subsequent calculation of the air compressor performance parameters. Due to unreasonable installation of the temperature sensor, the temperature sensor is prone to bumping and breaking during operation, resulting in high maintenance costs. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the utility model proposes an air compressor test bench, which can measure the temperature of the air inlet and outlet ends of the air compressor, avoid collision and breakage of the temperature measuring components during operation, and reduce maintenance costs.

[0006] The embodiment of the utility model also provides an air compressor testing system.

[0007] The air compressor test bench according to the embodiment of the utility model comprises a first tube body and a second tube body, wherein the first tube body is used to be connected to the air inlet end of the air compressor to be tested, and the second tube body is used to be connected to the air outlet end of the air compressor to be tested.

[0008] A first temperature measuring part is provided on the first tube body, and the first temperature measuring part is used to install a temperature measuring component to detect the temperature of the air inlet end of the air compressor to be tested. A second temperature measuring part is provided on the second tube body, and the second temperature measuring part is used to install a temperature measuring component to detect the temperature of the air outlet end of the air compressor to be tested.

[0009] The side wall of the first tube body and the side wall of the second tube body have at least a first wall surface and a second wall surface in the circumferential direction, and the first temperature measuring part and the second temperature measuring part are both arranged on the first wall surface of the corresponding tube body to avoid the second wall surface.

[0010] The air compressor test bench of the embodiment of the utility model can measure the temperature of the air inlet and outlet ends of the air compressor. By restricting the arrangement position of the temperature measuring components, it is avoided that the temperature measuring components are arranged in positions where they are prone to bumps and scratches during operation, and it is avoided that the temperature measuring components are bumped and broken during operation, thereby reducing maintenance costs.

[0011] In some embodiments, the number of the first temperature measuring unit and the number of the second temperature measuring unit are both one.

[0012] In some embodiments, the number of the first temperature measuring parts is 2 or 3, and the first temperature measuring parts are arranged on the first wall surface at intervals along the circumferential direction of the first tube body, or the first temperature measuring parts are arranged on the first wall surface at intervals along the axial direction of the first tube body; and / or

[0013] The number of the second temperature measuring parts is 2 or 3, and the second temperature measuring parts are arranged on the first wall surface at intervals along the circumferential direction of the second tube body, or the second temperature measuring parts are arranged on the first wall surface at intervals along the axial direction of the second tube body.

[0014] In some embodiments, the first tube body and the second tube body are both provided with a first through hole, and the first temperature measuring part and the second temperature measuring part both include:

[0015] The main body is fixed to the corresponding first tube body or the second tube body, and a second through hole is provided in the middle of the main body, and the second through hole is communicated with the first through hole on the corresponding tube body.

[0016] In some embodiments, the first through hole includes a first section close to the second through hole and a second section away from the second through hole, the aperture of the first section matches the outer diameter of the body, and the aperture of the second section matches the outer diameter of the temperature measuring component; and / or

[0017] The second through hole includes a third section away from the first through hole and a fourth section close to the first through hole, the aperture of the third section is larger than the aperture of the fourth section, and the aperture size of the fourth section matches the outer diameter size of the temperature measuring component.

[0018] In some embodiments, the first through hole and the second through hole are coaxially arranged, and the axis of the second through hole is perpendicular to and intersects with the axis of the corresponding first tube body or second tube body.

[0019] In some embodiments, the temperature measuring component penetrates into the first tube body and the second tube body to a depth of 1 / 4d to 1 / 2d;

[0020] Wherein, d is the diameter of the first tube body and the second tube body.

[0021] In some embodiments, the air compressor test bench further includes a frame, which is used to support the air compressor to be tested, and an installation station and a controller are provided on the frame.

[0022] In some embodiments, the air compressor test bench further comprises a flow meter, wherein the flow meter is arranged at an end of the first tube body away from the air compressor to be tested; and / or

[0023] The air compressor test bench further comprises a first pressure measuring part and a second pressure measuring part, wherein the first pressure measuring part is arranged on the first tube body, and the first pressure measuring part is used to detect the air pressure at the air inlet end of the air compressor to be tested, and the second pressure measuring part is arranged on the second tube body, and the second pressure measuring part is used to detect the air pressure at the air outlet end of the air compressor to be tested; and / or

[0024] The air compressor test bench also includes a third tube body and a fourth tube body, which are arranged in parallel and connected to an end of the second tube body away from the air compressor to be tested. The third tube body is provided with an electric regulating valve, and the fourth tube body is provided with a bypass valve.

[0025] The air compressor testing system of the utility model embodiment includes:

[0026] An air compressor test bench as described in any one of the above embodiments;

[0027] A plurality of temperature measuring components, wherein the plurality of temperature measuring components are respectively arranged at the first temperature measuring portion and the second temperature measuring portion;

[0028] A data acquisition module is electrically connected to the temperature measuring component. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an air compressor test bench according to an embodiment of the utility model.

[0030] Figure 2 yes Figure 1 Schematic diagram of the structure viewed from above.

[0031] Figure 3 yes Figure 1 Schematic diagram of the side structure.

[0032] Figure 4 It is a schematic diagram of the structure of the first tube body or the second tube body in an embodiment of the utility model.

[0033] Figure 5 It is a schematic diagram of the installation structure of the first temperature measuring part or the second temperature measuring part in the embodiment of the utility model.

[0034] Figure 6 It is a structural schematic diagram of the first through hole in the embodiment of the utility model.

[0035] Reference numerals:

[0036] 1. first tube body; 11. first temperature measuring part; 12. first pressure measuring part; 13. flow meter; 14. first through hole; 141. first section; 142. second section; 15. second through hole; 151. third section; 152. fourth section; 16. body;

[0037] 2. second tube body; 21. second temperature measuring part; 22. second pressure measuring part;

[0038] 3. Frame; 31. Controller;

[0039] 4. The third pipe body; 41. The electric regulating valve;

[0040] 5. Fourth pipe body; 51. Bypass valve;

[0041] 6. Air compressor to be tested. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0043] See also Figure 1-Figure 6 , the air compressor test bench of the embodiment of the present invention is described in detail.

[0044] like Figure 1-Figure 3 As shown, the air compressor test bench includes a first tube body 1 and a second tube body 2. The first tube body 1 is used to connect with the air inlet end of the air compressor 6 to be tested, and the second tube body 2 is used to connect with the air outlet end of the air compressor 6 to be tested. The airflow at the air inlet end of the air compressor flows into the air compressor through the first tube body 1, and the airflow at the air outlet end of the air compressor passes through the second tube body 2 and is discharged from the air compressor.

[0045] The first tube body 1 is provided with a first temperature measuring portion 11, which is used to install a temperature measuring component to detect the temperature of the air inlet end of the air compressor 6 to be tested, and the second tube body 2 is provided with a second temperature measuring portion 21, which is used to install a temperature measuring component to detect the temperature of the air outlet end of the air compressor 6 to be tested. The temperature of the air inlet end and the temperature of the air outlet end of the air compressor are used to calculate the performance parameters of the air compressor, and can be directly or indirectly used to calculate the performance parameters such as flow rate, reduced speed, and pressure ratio.

[0046] The side wall of the first tube body 1 and the side wall of the second tube body 2 have at least a first wall surface and a second wall surface in the circumferential direction, and the first temperature measuring part 11 and the second temperature measuring part 21 are both arranged on the first wall surface of the corresponding tube body to avoid the second wall surface. It should be understood that after the first tube body 1 and the second tube body 2 are assembled with the air compressor, some of the wall surfaces of the first tube body 1 and the second tube body 2 are not easy to touch, but some of the wall surfaces are exposed to the range of activities of the operators and are easily bumped or scratched. Therefore, the area of ​​the first tube body 1 and the second tube body 2 that is not easy to touch is divided into the first wall surface, and the area that is easy to be bumped or scratched is divided into the second wall surface. When the first temperature measuring part 11 and the second temperature measuring part 21 are arranged, the position can be designed in a targeted manner, and the positions of the first temperature measuring part 11 and the second temperature measuring part 21 can be reasonably arranged to avoid the temperature measuring components being arranged in areas that are prone to collision.

[0047] The air compressor test bench of the embodiment of the utility model can measure the temperature of the air inlet and outlet ends of the air compressor. By restricting the arrangement position of the temperature measuring components, it is avoided that the temperature measuring components are arranged in positions where they are prone to bumps and scratches during operation, and it is avoided that the temperature measuring components are bumped and broken during operation, thereby reducing maintenance costs.

[0048] like Figure 4 and Figure 5 As shown, in some embodiments, the number of the first temperature measuring part 11 and the number of the second temperature measuring part 21 are both 1. By providing a first temperature measuring part 11 and a second temperature measuring part 21, the temperature detection of the air inlet and outlet of the air compressor can be realized, the number of temperature sensors is simplified, and after the position of the temperature measuring part is reasonably designed, the detection accuracy of the gas temperature can also be guaranteed. In addition, the number of data acquisition modules and program content can be simplified, the number of electronic components can be reduced, and further, the reasonable optimization of system hardware and software can be realized.

[0049] In some embodiments, the number of the first temperature measuring parts 11 is 2 or 3, and the first temperature measuring parts 11 are arranged on the first wall surface along the circumferential direction of the first tube body 1 at intervals, or the first temperature measuring parts 11 are arranged on the first wall surface along the axial direction of the first tube body 1 at intervals.

[0050] The number of the second temperature measuring parts 21 is 2 or 3. The second temperature measuring parts 21 are arranged on the first wall surface at intervals along the circumferential direction of the second tube body 2 , or the second temperature measuring parts 21 are arranged on the first wall surface at intervals along the axial direction of the second tube body 2 .

[0051] When multiple first temperature measuring parts 11 and second temperature measuring parts 21 are set, the positions of the first temperature measuring parts 11 and the second temperature measuring parts 21 can be arranged relatively flexibly on the corresponding first wall surface, which can not only reduce the safety hazards of the temperature measuring components during operation, but also comprehensively process the data of multiple temperature measuring components according to needs. Compared with the circumferentially evenly distributed arrangement of four temperature sensors in the related technology, the problem of obvious marginal effect caused by too many temperature sensors is avoided, so that the temperature detection system is streamlined to a certain extent and the system is prevented from being too bloated.

[0052] like Figure 5 and Figure 6 As shown, in some embodiments, the first tube body 1 and the second tube body 2 are both provided with a first through hole 14, the first temperature measuring part 11 and the second temperature measuring part 21 both include a body 16, the body 16 is fixed to the corresponding first tube body 1 or the second tube body 2, and the middle part of the body 16 has a second through hole 15, and the second through hole 15 is connected to the first through hole 14 on the corresponding tube body.

[0053] That is to say, in order to facilitate the installation of the temperature measuring component, the temperature measuring component used in the embodiment of the present invention can be a PT1000 temperature sensor. The first temperature measuring part 11 and the second temperature measuring part 21 both include a main body 16. The temperature sensor is installed using the main body 16 to improve the stability of the installation of the temperature sensor. It is also convenient to use the main body 16 to adjust the depth of the temperature sensor inserted into the first tube body 1 and the second tube body 2.

[0054] like Figure 5 and Figure 6 As shown, in some embodiments, the first through hole 14 includes a first section 141 close to the second through hole 15 and a second section 142 away from the second through hole 15, the aperture of the first section 141 matches the outer diameter of the body 16, and the aperture of the second section 142 matches the outer diameter of the temperature measuring component.

[0055] The second through hole 15 includes a third section 151 away from the first through hole 14 and a fourth section 152 close to the first through hole 14. The aperture of the third section 151 is larger than that of the fourth section 152. The aperture size of the fourth section 152 matches the outer diameter size of the temperature measuring component.

[0056] It should be understood that the temperature measuring part in the related art is difficult to process, and the temperature measuring hole is easily blocked during welding, resulting in the inability of the subsequent temperature sensor to be accurately inserted into the temperature measuring hole. The embodiment of the present invention designs the first through hole 14 and the second through hole 15 in a segmented manner, which can better realize the connection between the body 16 and the corresponding pipe body, and at the same time can provide a good guide for the temperature sensor, ensure the stability and measurement accuracy of the temperature sensor, and reduce the difficulty of processing and manufacturing.

[0057] like Figure 5 and Figure 6As shown, in some embodiments, the first through hole 14 and the second through hole 15 are coaxially arranged, and the axis of the second through hole 15 is perpendicular to and intersects with the axis of the corresponding first tube body 1 or second tube body 2. It should be understood that the first through hole 14 and the second through hole 15 are coaxially arranged and the temperature sensor inserted into the first tube body 1 and the second tube body 2 can extend toward the center position of the first tube body 1 and the second tube body 2, which is more convenient for adjusting and controlling the insertion depth of the temperature sensor, and also makes the airflow direction in the tube body and the insertion direction of the temperature sensor meet the design standards, thereby ensuring the detection accuracy.

[0058] In some embodiments, the temperature measuring component penetrates into the first tube body 1 and the second tube body 2 to a depth of 1 / 4d to 1 / 2d; wherein d is the diameter of the first tube body 1 and the second tube body 2. In order to prevent the temperature of the inlet and outlet pipe walls from being uneven due to uneven gas friction or processing differences, the insertion depth of the temperature measuring component in the embodiment of the present invention is in the range of 1 / 4d to 1 / 2d. When the insertion depth is less than 1 / 4d, it is easily affected by the pipe wall temperature. When the insertion depth is greater than 1 / 2d, it will lead to excessive penetration, which poses some potential risks to the detection accuracy. The temperature measuring component can penetrate into the first tube body 1 and the second tube body 2 to a depth of 1 / 4d, 1 / 3d, 2 / 5d or 1 / 2d.

[0059] like Figure 1-Figure 3 As shown, in some embodiments, the air compressor test bench further includes a frame 3, the frame 3 is used to support the air compressor 6 to be tested, and the frame 3 is provided with an installation station and a controller 31. The air compressor 6 to be tested is arranged on the installation station, and the controller 31 is used to control the action of the air compressor 6 to be tested. When performing the test, the first pipe body 1 and the second pipe body 2 are respectively connected to the air inlet and outlet ends of the air compressor 6 to be tested.

[0060] like Figure 1-Figure 3 As shown, in some embodiments, the air compressor test bench further includes a flow meter 13, which is disposed at one end of the first tube body 1 away from the air compressor 6 to be tested. The flow meter 13 is used to detect the flow rate of the air inlet end of the air compressor.

[0061] like Figure 1-Figure 3 As shown, in some embodiments, the air compressor test bench further includes a first pressure measuring part 12 and a second pressure measuring part 22, the first pressure measuring part 12 is arranged on the first tube body 1, and the first pressure measuring part 12 is used to detect the air pressure at the air inlet end of the air compressor 6 to be tested, and the second pressure measuring part 22 is arranged on the second tube body 2, and the second pressure measuring part 22 is used to detect the air pressure at the air outlet end of the air compressor 6 to be tested. The air pressure at the air inlet and outlet ends of the air compressor will also be directly or indirectly used for the calculation of parameter performance.

[0062] like Figure 1-Figure 3As shown, in some embodiments, the air compressor test bench further includes a third pipe body 4 and a fourth pipe body 5, which are arranged in parallel and connected to one end of the second pipe body 2 away from the air compressor 6 to be tested, and an electric regulating valve 41 is arranged on the third pipe body 4, and a bypass valve 51 is arranged on the fourth pipe body 5. The electric regulating valve 41 and the bypass valve 51 can control the on and off of the corresponding third pipe body 4 and the fourth pipe body 5, and the electric regulating valve 41 can also be used to automatically adjust the gas flow of the third pipe body 4 to meet the test parameters of the air compressor.

[0063] The air compressor test bench of the utility model embodiment can reduce the number of components and optimize the layout of components without sacrificing the acquisition accuracy, which helps to streamline the acquisition system and data calculation, is easier for operators to use and maintain in the later stage, improves maintenance efficiency, and reduces maintenance costs. When processing and manufacturing components, it can reduce the processing difficulty and cost and reduce the number of PLC acquisition modules.

[0064] The air compressor test system of the embodiment of the utility model includes an air compressor test bench as in any of the above embodiments, multiple temperature measuring components and a data acquisition module, the multiple temperature measuring components are respectively arranged at the first temperature measuring part 11 and the second temperature measuring part 21, and the data acquisition module is electrically connected to the temperature measuring components.

[0065] The temperature measuring component can use a PT1000 temperature sensor, and use a PLC data acquisition module to collect data to obtain the gas temperature at the air inlet and outlet of the air compressor. The air compressor test system of the embodiment of the present invention can at least achieve the beneficial effects of the air compressor test bench in the above embodiment, so it is not repeated here. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An air compressor test bench, characterized in that: It comprises a first tube body and a second tube body, wherein the first tube body is used to be connected to the air inlet end of the air compressor to be tested, and the second tube body is used to be connected to the air outlet end of the air compressor to be tested; The first tube body is provided with a first temperature measuring portion, the first temperature measuring portion is used to install a temperature measuring component to detect the temperature of the air inlet end of the air compressor to be tested, and the second tube body is provided with a second temperature measuring portion, the second temperature measuring portion is used to install a temperature measuring component to detect the temperature of the air outlet end of the air compressor to be tested; The side wall of the first tube body and the side wall of the second tube body have at least a first wall surface and a second wall surface in the circumferential direction, and the first temperature measuring part and the second temperature measuring part are both arranged on the first wall surface of the corresponding tube body to avoid the second wall surface.

2. The air compressor test bench according to claim 1, characterized in that: The number of the first temperature measuring unit and the number of the second temperature measuring unit are both one.

3. The air compressor test bench according to claim 2, characterized in that: The number of the first temperature measuring parts is 2 or 3, and the first temperature measuring parts are arranged on the first wall surface at intervals along the circumferential direction of the first tube body, or the first temperature measuring parts are arranged on the first wall surface at intervals along the axial direction of the first tube body; and / or The number of the second temperature measuring parts is 2 or 3, and the second temperature measuring parts are arranged on the first wall surface at intervals along the circumferential direction of the second tube body, or the second temperature measuring parts are arranged on the first wall surface at intervals along the axial direction of the second tube body.

4. The air compressor test bench according to claim 1, characterized in that: The first tube body and the second tube body are both provided with a first through hole, and the first temperature measuring part and the second temperature measuring part both include: The main body is fixed to the corresponding first tube body or the second tube body, and a second through hole is provided in the middle of the main body, and the second through hole is communicated with the first through hole on the corresponding tube body.

5. The air compressor test bench according to claim 4, characterized in that: The first through hole comprises a first section close to the second through hole and a second section away from the second through hole, the aperture of the first section matches the outer diameter of the body, and the aperture of the second section matches the outer diameter of the temperature measuring component; and / or The second through hole includes a third section away from the first through hole and a fourth section close to the first through hole, the aperture of the third section is larger than the aperture of the fourth section, and the aperture size of the fourth section matches the outer diameter size of the temperature measuring component.

6. The air compressor test bench according to claim 4 or 5, characterized in that: The first through hole and the second through hole are coaxially arranged, and the axis of the second through hole is perpendicular to and intersects with the axis of the corresponding first tube body or second tube body.

7. The air compressor test bench according to claim 1, characterized in that: The temperature measuring component penetrates into the first tube body and the second tube body to a depth of 1 / 4d to 1 / 2d; Wherein, d is the diameter of the first tube body and the second tube body.

8. The air compressor test bench according to claim 1, characterized in that: It also includes a frame, which is used to support the air compressor to be tested, and the frame is provided with an installation station and a controller.

9. The air compressor test bench according to claim 1, characterized in that: It also includes a flow meter, which is arranged at an end of the first tube body away from the air compressor to be tested; and / or It also includes a first pressure measuring part and a second pressure measuring part, wherein the first pressure measuring part is arranged on the first tube body and is used to detect the air pressure at the air inlet end of the air compressor to be tested, and the second pressure measuring part is arranged on the second tube body and is used to detect the air pressure at the air outlet end of the air compressor to be tested; and / or It also includes a third tube body and a fourth tube body, which are arranged in parallel and connected to an end of the second tube body away from the air compressor to be tested, the third tube body is provided with an electric regulating valve, and the fourth tube body is provided with a bypass valve.

10. An air compressor testing system, characterized in that: include: An air compressor test bench as claimed in any one of claims 1 to 9; A plurality of temperature measuring components, wherein the plurality of temperature measuring components are respectively arranged at the first temperature measuring portion and the second temperature measuring portion; A data acquisition module is electrically connected to the temperature measuring component.

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