Test box for testing air volume of automobile heat pump air conditioner

Abstract

The utility model discloses an automobile heat pump air conditioner air volume test box, which relates to the technical field of automobile air conditioner test, and comprises a console and a connecting cover, the upper end of the console is fixedly connected with a test box, the inner side of the connecting cover is provided with a mounting groove, the inside of the mounting groove is fixedly connected with an elastic air bag, and the left end of the test box is communicated with an air inlet pipe. According to the automobile heat pump air conditioner air outlet adjusting device, due to the fact that the elastic air bag with the inflation pipe is installed on the inner side of the connecting cover, self-adaptive adjustment can be conducted according to the shapes and the sizes of different automobile heat pump air conditioner air outlets; by adopting a multi-stage air duct structure composed of the first variable-diameter connecting pipeline, the first static pressure box, the first rectification section, the second rectification section, the second static pressure box and the second variable-diameter connecting pipeline and combining the functions of the rectification grid and the static pressure box, turbulent flow and vortex can be reduced, and the precision of air volume measurement is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning testing technology, specifically to an automotive heat pump air conditioning air volume testing chamber. Background Technology

[0002] An automotive heat pump air conditioner is an air conditioning system that integrates heating and cooling functions. It can provide efficient in-vehicle temperature control in different temperature environments. Its working principle is similar to that of a traditional air conditioner, but it uses heat pump technology and can work in reverse, so it can both cool and heat.

[0003] The shape and size of the air outlet of the heat pump air conditioner vary from car model to car model. The interface size of the existing car heat pump air conditioner air volume test chamber is relatively uniform and has low versatility. Moreover, during the test, the airflow in the air duct is prone to generating turbulence and eddies, resulting in uneven airflow distribution and reducing the accuracy of air volume measurement. Therefore, a new car heat pump air conditioner air volume test chamber is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the aforementioned technical problems, an automotive heat pump air conditioning airflow testing chamber is provided. This technical solution solves the problem mentioned in the background that there are certain differences in the shape and size of the air outlet of automotive heat pump air conditioning systems of different models. The existing automotive heat pump air conditioning airflow testing chambers have relatively simple interface sizes and low versatility. Furthermore, during testing, the airflow in the current chamber is prone to generating turbulence and eddies, resulting in uneven airflow distribution and thus reducing the accuracy of airflow measurement.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A test chamber for testing the airflow of an automotive heat pump air conditioner includes a control console and a connecting cover. The test chamber is fixedly connected to the upper end of the control console. An installation groove is provided on the inner side of the connecting cover, and an elastic airbag is fixedly connected inside the installation groove. An air inlet pipe is connected to the left end of the test chamber. A first reducing diameter connecting pipe is fixedly connected to the right end of the air inlet pipe. A first static pressure box is fixedly connected to the right end of the first reducing diameter connecting pipe. A first rectifier section is fixedly connected to the right end of the first rectifier section. A fixing plate is fixedly connected to the right end of the fixing plate. A second rectifier section is fixedly connected to the right end of the second rectifier section. A second static pressure box is fixedly connected to the right end of the second static pressure box. A second reducing diameter connecting pipe is fixedly connected to the right end of the second reducing diameter connecting pipe. An air outlet pipe is connected to the right end of the test chamber. Multiple evenly distributed nozzles are fixedly connected inside the fixing plate. A receiving cavity is provided inside the fixing plate near the rear end of the nozzles, and a differential pressure sensor is installed inside the receiving cavity.

[0007] Preferably, the nozzle has a first sampling port at the air inlet and a second sampling port at the air outlet, and the first and second sampling ports are respectively connected to the two measuring ends of the differential pressure sensor.

[0008] Preferably, rectifier grids are fixedly connected inside both the first rectifier section and the second rectifier section.

[0009] Preferably, the left end of the air inlet pipe is fixedly connected to a first connecting pipe, and the other end of the first connecting pipe is fixedly connected to a guide cover, with the lower end of the guide cover fixedly connected to the upper end of the connecting cover.

[0010] Preferably, the right end of the air outlet pipe is fixedly connected to a second connecting pipe, and the other end of the second connecting pipe extends through the right end of the control console into the interior of the control console and is fixedly connected to a fan.

[0011] Preferably, the outer surface of the elastic airbag is connected to an inflation tube, one end of which penetrates the outer surface of the connecting cover and extends to the outside of the connecting cover.

[0012] The advantages of this utility model compared with the prior art are:

[0013] This solution proposes an automotive heat pump air conditioning airflow testing chamber. By installing an elastic airbag with an inflation tube inside the connecting cover, it can adaptively adjust to the shape and size of different automotive heat pump air conditioning outlets to achieve a tight seal connection. By adopting a multi-stage air duct structure consisting of a first variable diameter connecting pipe, a first static pressure box, a first rectifier section, a second rectifier section, a second static pressure box, and a second variable diameter connecting pipe, combined with the functions of the rectifier grid and the static pressure box, the airflow can flow evenly and stably within the air duct, reducing the generation of turbulence and eddies, and improving the accuracy of airflow measurement. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the test box in this utility model;

[0016] Figure 3 This is a schematic diagram of the connecting cover in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the fixing plate in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the first sampling port and the second sampling port in this utility model;

[0019] Figure 6 This is a schematic diagram of the rectifier grid in this utility model.

[0020] The numbers on the map are:

[0021] 1. Control console; 2. Test chamber; 3. Connecting cover; 4. Mounting slot; 5. Elastic airbag; 6. Inflation pipe; 7. Air inlet pipe; 8. First reducing diameter connecting pipe; 9. First static pressure box; 10. First rectifier section; 1001. Rectifier grid; 11. Fixing plate; 1101. Nozzle; 1102. Differential pressure sensor; 1103. First sampling port; 1104. Second sampling port; 12. Second rectifier section; 13. Second static pressure box; 14. Second reducing diameter connecting pipe; 15. Air outlet pipe; 16. Guide cover; 17. First connecting pipe; 18. Second connecting pipe. Detailed Implementation

[0022] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0023] Reference Figures 1-6 As shown, a test chamber for testing the airflow of an automotive heat pump air conditioner includes a control console 1 and a connecting cover 3. A test chamber 2 is fixedly connected to the upper end of the control console 1. An installation groove 4 is provided on the inner side of the connecting cover 3, and an elastic airbag 5 is fixedly connected inside the installation groove 4. An air inlet pipe 7 is connected to the left end of the test chamber 2. A first reducing diameter connecting pipe 8 is fixedly connected to the right end of the air inlet pipe 7. A first static pressure chamber 9 is fixedly connected to the right end of the first reducing diameter connecting pipe 8. A first rectifier section 10 is fixedly connected to the right end of the first static pressure chamber 9, and a fixing plate is fixedly connected to the right end of the first rectifier section 10. 11. A second rectifier section 12 is fixedly connected to the right end of the fixed plate 11. A second static pressure box 13 is fixedly connected to the right end of the second rectifier section 12. A second variable diameter connecting pipe 14 is fixedly connected to the right end of the second static pressure box 13. An air outlet pipe 15 is connected to the right end of the second variable diameter connecting pipe 14. The air outlet pipe 15 is fixedly connected to the right end of the test box 2. Multiple evenly distributed nozzles 1101 are fixedly connected inside the fixed plate 11. A receiving cavity is opened inside the fixed plate 11 near the rear end of the nozzles 1101. A differential pressure sensor 1102 is installed in the receiving cavity.

[0024] Furthermore, the outer surface of the elastic airbag 5 is connected to an inflation tube 6. One end of the inflation tube 6 extends through the outer surface of the connecting cover 3 to the outside of the connecting cover 3 and is connected to the inflation device. The connecting cover 3 is used to connect with the air outlet of the automotive heat pump air conditioner. By placing the connecting cover 3 at the air outlet of the automotive heat pump air conditioner and then inflating the elastic airbag 5 through the inflation device, the elastic airbag 5 expands and fits tightly against the outer surface of the automotive heat pump air conditioner air outlet, achieving a sealed connection. This allows the automotive heat pump air conditioner to be connected to the test chamber. Due to the retractability of the elastic airbag 5, it can adapt to automotive heat pump air conditioner air outlets of different shapes and sizes, improving the versatility of the test chamber.

[0025] Furthermore, the air inlet duct 7 is a straight duct with a certain length. As the channel for airflow to enter the test chamber, the straight duct design helps to reduce the turbulence and eddies of airflow before entering the air duct system, so that the airflow enters the test chamber 2 more smoothly.

[0026] Furthermore, a first sampling port 1103 is provided at the air inlet of the nozzle 1101, and a second sampling port 1104 is provided at the air outlet of the nozzle 1101. The first sampling port 1103 and the second sampling port 1104 are respectively connected to the two measuring ends of the differential pressure sensor 1102.

[0027] Furthermore, a first connecting pipe 17 is fixedly connected to the left end of the air inlet pipe 7, and a guide cover 16 is fixedly connected to the other end of the first connecting pipe 17. The lower end of the guide cover 16 is fixedly connected to the upper end of the connecting cover 3.

[0028] Furthermore, both the first rectification section 10 and the second rectification section 12 are fixedly connected with rectification grids 1001. The rectification grids 1001 in the first rectification section 10 can make the turbulent airflow more regular and parallel, reduce the generation of turbulence and eddies, and make the airflow flow more uniformly, providing accurate airflow conditions for subsequent airflow measurement. The rectification grids 1001 in the second rectification section 12 can stabilize the pressure of the airflow ejected from the nozzle 1101, prepare for subsequent airflow discharge, and at the same time eliminate noise and fluctuations in the airflow, improving the stability of the test environment.

[0029] Furthermore, one end of the first variable diameter connecting pipe 8 and the second variable diameter connecting pipe 14 are both circular, and the other end is both rectangular. They are used to connect the air inlet pipe 7 and the air outlet pipe 15 to the first static pressure box 9 and the second static pressure box 13. The first variable diameter connecting pipe 8 enables the airflow to smoothly transition from the circular air inlet pipe 7 to the rectangular first static pressure box 9, adjusting the airflow distribution and speed to provide better conditions for subsequent rectification and measurement. The second variable diameter connecting pipe 14, by changing the shape and size of the pipe, enables the airflow to smoothly transition from the rectangular second static pressure box 13 to the circular air outlet pipe 15, adjusting the airflow distribution and speed to ensure that the airflow can be smoothly discharged from the test chamber.

[0030] Furthermore, the first static pressure chamber 9 ensures that the incoming airflow is fully mixed within the chamber, thereby stabilizing the airflow pressure, reducing airflow fluctuations, and providing stable airflow conditions for subsequent rectification and measurement.

[0031] Furthermore, the second static pressure chamber 13 ensures that the airflow passing through the second rectifier section 12 is fully mixed within the chamber, stabilizing the airflow pressure and preparing for subsequent airflow discharge.

[0032] Furthermore, a second connecting pipe 18 is fixedly connected to the right end of the air outlet duct 15. The other end of the second connecting pipe 18 extends through the right end of the control console 1 into the interior of the control console 1 and is fixedly connected to a fan. The fan provides power for the airflow in the test chamber 2, enabling the airflow blown out by the car heat pump air conditioner to circulate in the test chamber 2 and complete the air volume test process. By adjusting the fan speed, different working conditions can be simulated to meet different test requirements.

[0033] Furthermore, the control console 1 is equipped with a display screen and contains a control circuit and a data processing module for controlling the operation of the fan and processing measurement data. As the control center of the entire test chamber, the operator can set test parameters and control the start, stop and speed of the fan through the operation panel. The data processing module in the control console 1 is used to receive the measurement data transmitted by the differential pressure sensor 1102, perform calculations and analysis, and finally display the air volume measurement results on the display screen.

[0034] Furthermore, when the airflow passes through the nozzle 1101, a pressure difference is generated at the inlet and outlet due to the contraction of the nozzle 1101. By measuring this pressure difference and combining it with the algorithm preset by the mathematical model based on the principle of fluid dynamics, the airflow velocity and air volume can be accurately calculated. The first sampling port 1103 is used to transmit the airflow pressure at the air inlet of the nozzle 1101 to the differential pressure sensor 1102, and the second sampling port 1104 is used to transmit the airflow pressure at the air outlet of the nozzle 1101 to the differential pressure sensor 1102. The differential pressure sensor 1102 is electrically connected to the control console 1 and converts the measured differential pressure signal into an electrical signal, which is then transmitted to the data processing module of the control console 1 via a cable for air volume calculation.

[0035] Working principle: During measurement, the connecting cover 3 is placed at the air outlet of the car heat pump air conditioner. The inflation device is started to inflate the elastic airbag 5, causing the elastic airbag 5 to expand and tightly fit the outer surface of the car heat pump air conditioner air outlet to achieve a sealed connection. Then, test parameters such as fan speed and test time are set on the operation panel of the control console 1. After setting, the fans of the car heat pump air conditioner and the test chamber are started to make the airflow circulate in the air duct. The differential pressure sensor 1102 will measure the pressure difference between the inlet and outlet of the nozzle 1101 in real time and transmit the differential pressure signal to the data processing module of the control console 1. The data processing module calculates the differential pressure data according to the preset algorithm to obtain the air volume value of the car heat pump air conditioner and displays the result on the display screen.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A test chamber for testing the airflow of an automotive heat pump air conditioner, characterized in that, The utility model provides a test box, including control cabinet (1) and connecting cover (3), the upper end of control cabinet (1) is fixedly connected with test box (2), and the inside of connecting cover (3) is provided with installation groove (4), and the inside of installation groove (4) is fixedly connected with elastic air bag (5), and the left end of test box (2) is communicated with air inlet pipe (7), and the right end of air inlet pipe (7) is fixedly connected with first reducing connecting pipeline (8), and the right end of first reducing connecting pipeline (8) is fixedly connected with first static pressure tank (9), and the right end of first static pressure tank (9) is fixedly connected with first rectifier section (10), and the right end of first rectifier section (10) is fixedly connected with fixed plate (11), and the right end of fixed plate (11) is fixedly connected with second rectifier section (12), and the right end of second rectifier section (12) is fixedly connected with second static pressure tank (13), and the right end of second static pressure tank (13) is fixedly connected with second reducing connecting pipeline (14), and the right end of second reducing connecting pipeline (14) is communicated with air outlet pipe (15), and air outlet pipe (15) is fixedly connected to the right end of test box (2), and the inside of fixed plate (11) is fixedly connected with multiple evenly distributed nozzles (1101), and the rear end close to nozzle (1101) is provided with containing cavity in the inside of fixed plate (11), and containing cavity is provided with differential pressure sensor (1102).

2. The air volume test chamber of claim 1, wherein: The first sampling port (1103) and the second sampling port (1104) are respectively communicated with the two measuring ends of the differential pressure sensor (1102).

3. The air volume test chamber of claim 1, wherein: The first rectifier section (10) and the second rectifier section (12) are fixedly connected with rectifier grids (1001) in the inside.

4. The air volume test chamber of claim 1, wherein: The left end of the air inlet pipe (7) is fixedly connected with the first connecting pipe (17), and the other end of the first connecting pipe (17) is fixedly connected with the guide cover (16), and the lower end of the guide cover (16) is fixedly connected with the upper end of the connecting cover (3).

5. The air volume test chamber of claim 1, wherein: The right end of the air outlet pipe (15) is fixedly connected with the second connecting pipe (18), and the other end of the second connecting pipe (18) extends to the inside of the control cabinet (1) through the right end of the control cabinet (1) and is fixedly connected with the fan.

6. The air volume test chamber of claim 1, wherein: The outer surface of the elastic air bag (5) is communicated with the inflation pipe (6), and one end of the inflation pipe (6) extends to the outside of the connecting cover (3) through the outer surface of the connecting cover (3).

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