Combined test device for compact multipurpose energy-saving high-temperature fan

Abstract

A compact, multi-purpose, energy-saving, safe, high-temperature fan combined test device is provided. The test chamber (2) is installed horizontally. A ring-shaped adapter (4) is installed at the front end of the test chamber (2). A thermocouple temperature controller (13) is installed on the outer wall of the test chamber (2). A high-efficiency natural gas burner (14) is installed horizontally at the rear end of the test chamber (2). A flame tube (15) is installed at the front end of the high-efficiency natural gas burner (14) and extends into the front middle part of the test chamber (2). A baffle plate (16) is installed at the front end of the flame tube (15). A heat circulation pipe (12) is installed on the test chamber (2), and at least the air outlet of the heat circulation pipe (12) extends into the test chamber (2). The pipe installation method under simulated use conditions is used to conduct test verification of the fan equipment at the high-temperature operating design temperature. It ensures the strength and rigidity of the mechanical connections, improving the safety and reliability of the ventilation fan testing device; it is energy-saving and environmentally friendly, with energy savings of over 30%; the operating temperature range is extended to -30℃ to 120℃; it is easy to modify to achieve simultaneous testing of multiple parameters; and it is suitable for high-temperature testing in multiple scenarios and under multiple working conditions.

Description

Technical Field

[0001] This utility model belongs to the technical field of equipment specifically applicable to the performance testing of wind turbine equipment under IPC classification F04D27 / 00, and particularly relates to a structural improvement technology of a device, applicable to the field of industrial equipment testing technology. Background Technology

[0002] High-temperature fans are widely used in industrial fields, especially in industries such as metallurgy, chemical industry, and cement industry, where they need to operate continuously and stably in high-temperature environments.

[0003] With increasing demands for energy efficiency and safety in industrial equipment, the performance testing and evaluation of high-temperature fans have become particularly important. As more commercial cases require aerodynamic performance testing of ventilation fans, and some owners request on-site observation of the testing process, and as technological research and development improvements require verification within a testing system to facilitate various technological advancements, testing equipment can simulate actual operating conditions to comprehensively verify the performance of high-temperature fans, providing data support for product optimization.

[0004] Among these methods, the aerodynamic performance test of a ventilation fan determines the shaft power. When the measured power is the input power of the ventilation fan shaft, three methods are generally used: 1. the balancing motor method, 2. the torque meter method, and 3. the electrical measurement method. The torque meter method is widely accepted in the industry and is the mainstream testing method. The testing technology and equipment in this area are relatively mature. For example, patent application 202320070842.9 belongs to the field of ventilation fan input power testing technology, specifically involving a ventilation fan testing device, including a support mechanism, a torque meter, a fan under test, and a power mechanism. The fan end support and the power end support are detachably connected along the axis of the power mechanism via a support connecting plate, and the distance between the fan end support and the power end support along the axis of the power mechanism is adjustable.

[0005] On the other hand, this utility model directly addresses the limited disclosure of technologies for energy-saving and safety testing devices suitable for high-temperature conditions applied to high-temperature fans. However, in the high-temperature gas transport operations of ovens, dryers, and industrial furnaces widely used in the iron and steel metallurgy, solid waste gas treatment, and new materials and new energy industries, high-temperature fans are typically required. In particular, the lack of necessary testing methods for operating at high temperatures (80-600)℃ increases the application risks for producers and users and poses safety hazards to the stable operation of high-temperature fan systems.

[0006] Even if some undisclosed or limited experimental testing devices are proposed, the following shortcomings exist:

[0007] Poor adaptability to high-temperature environments: The test device is prone to problems such as poor heat dissipation and component aging under high-temperature conditions, which affects the test accuracy and equipment life.

[0008] Limited testing functionality: It is inconvenient to modify and add testing modules, as it can only test a single performance parameter and cannot comprehensively evaluate the energy efficiency, safety, and stability of the wind turbine.

[0009] High energy consumption: The test process consumes a large amount of energy, which does not meet the requirements for energy conservation and environmental protection.

[0010] Insufficient safety: There is a lack of effective safety protection measures, and there are safety hazards under high pressure and high temperature conditions.

[0011] Inaccurate data acquisition: The testing method is difficult to achieve simultaneous acquisition and real-time monitoring of multiple parameters. Utility Model Content

[0012] This invention designs a compact, multi-purpose, energy-saving, and safe combined testing device for high-temperature fans, solving the problems of existing high-temperature fan testing devices having single functions, high energy consumption, and insufficient safety.

[0013] Therefore, this utility model discloses a compact, multi-purpose, energy-saving, safe, and combined testing device for high-temperature fans, comprising: a test chamber, an adapter, a heat circulation pipe, a thermocouple temperature controller, a high-efficiency natural gas burner, a flame tube, and a baffle plate. The test chamber is elongated cylindrical and horizontally installed. An annular adapter is installed at the front end of the test chamber. A thermocouple temperature controller is installed on the outer wall of the test chamber. The high-efficiency natural gas burner is installed horizontally at the rear end of the test chamber. A flame tube is installed at the front end of the high-efficiency natural gas burner and extends into the front middle part of the test chamber. A baffle plate is installed at the front end of the flame tube. A heat circulation pipe is installed on the test chamber, wherein at least the outlet of the heat circulation pipe extends into the test chamber.

[0014] The air inlet of the heat circulation pipe is connected from the top front end of the test chamber, and the air outlet of the heat circulation pipe is connected from the top rear end of the test chamber. Furthermore, an annular inner sealing plate is installed on the inner wall of the test chamber behind the air inlet of the heat circulation pipe. Further, from front to back, the left side of the test chamber is equipped with an outer gearbox, a transmission box, an inner gearbox, and a front axle, all coaxial with the inner sealing plate.

[0015] An annular adapter, headstock, or inner sealing plate is installed inside the left port of the test chamber; the air outlet of the hot circulation pipe is connected to the front end of the test chamber, and the air inlet of the hot circulation pipe is connected to the air outlet of the high-temperature fan used for testing.

[0016] The test chamber is suspended at the bottom front side, and the rear end of the test chamber is fixedly connected to the front end of the test chamber. An operating table is set at the bottom of the test chamber.

[0017] An air damper is installed on the heat circulation pipeline.

[0018] The test chamber has a ring-shaped headstock installed inside the front port. An adapter seat is installed on the rear end of the inner wall of the headstock, and a sealing liner is installed on the inner wall of the headstock on the front side of the adapter seat.

[0019] The air inlet and outlet of the heat circulation pipe, as well as the orthographic projection of the centerline, are located between the outer wall of one side of the flame tube and the inner wall of the test chamber on the same side.

[0020] Furthermore, to achieve the above objectives, this utility model is configured as follows:

[0021] In particular, the inner diameters of both the heat circulation pipe and the flame pipe are larger than the inner diameter of the air inlet of the high-temperature fan used for testing, and the difference between the inner diameters of the heat circulation pipe and the flame pipe is less than 1 / 2 of the inner diameter of the air inlet of the high-temperature fan used for testing.

[0022] In particular, a heat exchanger connected to a cooling water pipeline is installed on the hot circulation pipeline, and a compressed air inlet pipe is connected to the test chamber, with a pressure gauge installed inside the test chamber.

[0023] In particular, an insulation layer is installed on the outer wall of the test chamber.

[0024] Compared with existing technologies, the beneficial effects of this utility model are: It simulates the working mode under actual use, conducting experimental verification of the fan equipment at high-temperature operating design temperatures. It features a compact structure, convenient installation and maintenance, low operating and maintenance costs, overall stability, and reduced probability of malfunctions. It ensures the strength and rigidity of the mechanical connections, improving the safety and reliability of the fan testing device; it is energy-saving and environmentally friendly, achieving energy savings of over 30%; the operating temperature range is extended to -30℃ to 120℃; it is easy to modify for simultaneous testing of multiple parameters; and it is suitable for high-temperature testing in various scenarios and under various operating conditions. Attached Figure Description

[0025] The following figures are illustrative and should not be construed as limiting the scope of this invention. Referring to the figures helps the reader understand the embodiments of this invention and further appreciate its advantages and technical features.

[0026] Figure 1 This is a schematic diagram of the main cross-sectional structure of Example 1.

[0027] Figure 2 This is a top view cross-sectional structural diagram of Example 1.

[0028] Figure 3 This is a schematic diagram of the main cross-sectional structure of Example 2.

[0029] The reference numerals in the figures include:

[0030] Test components include: 1. High-temperature fan; 2. Test chamber; 3. Front shaft; 4. Adapter; 5. Internal gearbox; 6. Machine base; 7. Headstock; 8. Tailstock; 9. External gearbox; 10. Transmission box; 11. Air damper; 12. Thermal circulation pipe; 13. Thermocouple temperature controller; 14. High-efficiency natural gas burner; 15. Flame tube; 16. Fire baffle; 17. Inlet inspection door; 18. Sealing ring; 19. Operating platform; 20. Inner sealing plate. Side test motor; 101. Side test impeller; 102. Side-view air collection duct; 103. Fan volute; 104. Air inlet; 105. Air outlet; 106. Detailed Implementation

[0031] It should be noted that:

[0032] In the description of this utility model, unless otherwise expressly specified and limited, the terms "comprising" and "having," and any variations thereof, are intended to cover other possible options under the same logic not listed. For example, a process, method, system, product, or device comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the utility model product is in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model. Furthermore, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Furthermore, terms such as "horizontal," "vertical," and "suspended" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. The terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components.

[0033] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of any conflict, the definitions in this specification shall prevail.

[0034] After the development of new ventilation fan products, the energy efficiency rating certification of the ventilation fan is carried out. The measurement results of the fan performance test "Performance Test of Standardized Air Duct for Industrial Ventilation Fans GB / T 1236 2017" are compared with "Energy Efficiency Limits and Energy Efficiency Grades of Ventilation Fans GB19761 2020" to determine whether it meets the requirements of a high-efficiency fan, that is, an energy efficiency rating of Level 1, Level 2 or Level 3.

[0035] The following technical solution is adopted in this utility model:

[0036] Modular design: It adopts a detachable and combinable structure, which facilitates quick replacement of damaged parts, reduces maintenance costs, supports quick switching between multiple test modes, and improves test flexibility.

[0037] Optimized heating and hot air circulation installation structure: integrates high-efficiency heat dissipation and insulation devices to ensure stable operation within the range of -30℃ to 120℃.

[0038] Convenient for installing multi-parameter sensing temperature control monitoring modules: including high-precision sensor arrays to monitor key parameters such as air volume, pressure, temperature, and vibration in real time.

[0039] Optimized energy-saving and safety protection design: The test chamber and burner installation structure adopt a box-shaped horizontal structure, which automatically adjusts energy consumption according to test requirements. The low-noise design meets environmental protection requirements and significantly reduces energy consumption.

[0040] This utility model includes: a test chamber 2, an adapter 4, a heat circulation pipe 12, a thermocouple temperature controller 13, a high-efficiency natural gas burner 14, a flame tube 15, and a baffle plate 16. The test chamber 2 is a long cylindrical shape and is installed horizontally. An annular adapter 4 is installed at the front end of the test chamber 2. The thermocouple temperature controller 13 is installed on the outer wall of the test chamber 2. The high-efficiency natural gas burner 14 is installed horizontally at the rear end of the test chamber 2. A flame tube 15 is installed at the front end of the high-efficiency natural gas burner 14 and extends into the front middle part of the test chamber 2. A baffle plate 16 is installed at the front end of the flame tube 15. The heat circulation pipe 12 is installed on the test chamber 2, wherein at least the air outlet of the heat circulation pipe 12 extends into the test chamber 2.

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] The high-temperature fan 1 for testing is installed on the combined test device for a compact, multi-purpose, energy-saving, and safe high-temperature fan of this utility model; the high-temperature fan 1 for testing includes a side test motor 101, a side test impeller 102, a side view air collection pipe 103, a fan volute 104, an air inlet 105, and an air outlet 106.

[0043] Example 1: The high-temperature fan 1 was disassembled and assembled into a compact, multi-purpose, energy-saving, and safe high-temperature fan combined testing device according to this utility model in an insert-type, volute-free installation state. The fan volute 104 was removed, and the main focus was on testing the high-temperature performance of the side impeller 102 and the air inlet 105. The specific installation structure is shown in the attached figure. Figure 1 , 2 As shown, the air inlet of the heat circulation pipe 12 is connected from the top front end of the test chamber 2, and the air outlet of the heat circulation pipe 12 is connected from the top rear end of the test chamber 2. Furthermore, an annular inner sealing plate 20 is installed on the inner wall of the test chamber 2 behind the air inlet of the heat circulation pipe 12. The test impeller 102 of the high-temperature fan 1 is disassembled and directly installed on the adapter 4. The test air collection pipe 103 on the air inlet 105 of the test impeller 102 is snapped and sealed to the shaft hole of the inner sealing plate 20. Further, a machine base 6 is suspended at the bottom front side of the test chamber 2. The rear end of the machine base 6 is fixedly connected to the front end face of the test chamber 2. An operating platform 19 is provided at the bottom of the machine base 6, and the test motor 101 is installed on the front end of the machine base 6. The rear end of the test motor 101 is coaxially connected to the outer gearbox 9, the transmission box 10, the inner gearbox 5, and the front shaft 3. The rear end of the front shaft 3 is connected to the shaft of the test impeller 102.

[0044] As mentioned above, an air damper 11 is installed on the heat circulation pipe 12.

[0045] As mentioned above, a ring-shaped headstock 7 is installed inside the front port of the test chamber 2. An adapter seat 4 is lined at the rear end of the inner wall of the headstock 7. A sealing liner 18 is installed on the inner wall of the headstock 7 on the front side of the adapter seat 4.

[0046] As mentioned above, the air inlet and outlet of the heat circulation pipe 12 and the orthographic projection of the centerline are located between the outer wall of one side of the flame tube 15 and the inner wall of the test chamber 2 on the same side.

[0047] In this embodiment of the present invention, in particular, the inner diameters of the heat circulation pipe 12 and the flame pipe 15 are both larger than the inner diameter of the air inlet 105 of the high-temperature fan 1 for testing, and the difference between the inner diameters of the heat circulation pipe 12 and the flame pipe 15 is less than 1 / 2 of the inner diameter of the air inlet 105 of the high-temperature fan 1 for testing.

[0048] In this embodiment of the present invention, the flame tube 15 of the high-efficiency natural gas burner 14 and the high-temperature fan 1 to be tested are installed opposite each other at both ends of the test chamber 2. Moreover, the high-temperature fan 1 and the hot circulation pipe 12 are used to complete the continuous internal circulation of hot air inside the test chamber 2.

[0049] The implementation principle of this embodiment is as follows: The test motor 101 operates, and its rear drive shaft sequentially drives the outer gearbox 9, transmission box 10, inner gearbox 5, and front shaft 3 to rotate. The front shaft 3 drives the test impeller 102 to rotate. The test impeller 102 drives the hot airflow introduced from the front of the test chamber 2 through the side-view air collection pipe 103 between the rear end face of the adapter 4 and the front end face of the inner sealing plate 20, causing it to enter the hot circulation pipe 12. Simultaneously, the high-efficiency natural gas burner 14 and flame tube 15 heat the airflow inside the test chamber 2, preventing it from being directly blown onto the side-view air collection pipe 103 under the protection of the baffle plate 16. The hot airflow in the hot circulation pipe 12 is then drawn back into the test chamber 2 through the outlet. During this process, the thermocouple temperature controller 13 operates stably, timely collecting operating parameters such as the airflow temperature inside the test chamber 2. The ventilation rate and flow rate of the hot circulation pipe 12 can be adjusted through the damper 11 to further control the airflow temperature inside the test chamber 2. The working performance of the test impeller 102 was tested and verified under a certain preset time period and operating temperature.

[0050] In this embodiment of the invention, the high-efficiency natural gas burner 14 inside the test chamber 2 is set to operate at 600°C, and the temperature inside the chamber is automatically controlled.

[0051] Example 2: The original, complete high-temperature fan 1 is directly installed on the left side of the test chamber 2 to facilitate the testing of the overall high-temperature performance of the high-temperature fan 1; it is mainly used for small and medium-sized high-temperature fans; that is, hot-state testing of single-inlet fans with casings; as shown in the attached... Figure 3 As shown, a ring-shaped adapter 4, a headstock 7, or an inner sealing plate 20 is installed inside the left port of the test chamber 2; the air outlet of the heat circulation pipe 12 is connected to the front end of the test chamber 2, and the air inlet of the heat circulation pipe 12 is connected to the air outlet 106 of the high-temperature fan 1 for testing; the fan casing 104 is fixed to the rear side of the side test motor 101; an operating platform 19 is installed at the bottom left end of the test chamber 2, a machine base 6 is installed on the upper side of the operating platform 19, and a side test motor 101 is installed on the machine base 6; the right side of the side test motor 101, i.e., the rear drive shaft, passes through the fan casing 104 and is connected to the side test impeller 102 shaft of the high-temperature fan 1 for testing; the air inlet 105 of the high-temperature fan 1 for testing is clamped onto the adapter 4, the headstock 7, or the hole in the inner sealing plate 20.

[0052] The working principle of this utility model embodiment is as follows: the side test motor 101 works, driving the side test impeller 102 of the test high temperature fan 1 to rotate. The hot airflow at the front end of the test chamber 2 enters the air inlet 105 of the test high temperature fan 1. The hot airflow quickly passes through the air outlet 106 of the test high temperature fan 1 and is introduced into the air inlet of the heat circulation pipe 12, and then circulates back into the test chamber 2 through the heat circulation pipe 12.

[0053] This utility model embodiment has a high-temperature operating design temperature of up to 600℃, making it suitable for the manufacturing industry of high-temperature fans and related equipment, as well as research institutes, to conduct experimental verification of new products under high-temperature hot working conditions. It facilitates the selection of different installation methods for test fans, such as insertion-type volute-less fans and single-inlet fans with casings. Furthermore, through combinations and variations of the piping system, various simulating operating conditions can be achieved through piping installation methods, enabling experimental verification of fan equipment at its high-temperature operating design temperature.

[0054] To further expand upon the embodiments of this utility model:

[0055] 1) A communication module and a central processing module are installed on the outer wall of the test chamber 2. Automatic control switches are set on the high-efficiency natural gas burner 14 and the high-temperature fan 1 for testing. Combined with the sensing operation of the thermocouple temperature controller 13, functions such as remote monitoring, local manual fine-tuning, and fully automatic operation can be realized. Its temperature control accuracy is controlled within ±1 / 100℃, which fully meets the requirements of the high-temperature fan and related equipment manufacturing industry for product testing and verification.

[0056] 2) Install a heat exchanger connected to a cooling water pipe on the hot circulation pipe 12. At the same time, connect a compressed air inlet pipe to the test chamber 2 and set a pressure gauge inside the test chamber 2 to meet the different cooling methods required by the high temperature fan 1 for testing, and to more conveniently simulate different scenarios.

[0057] 3) An insulation layer is installed on the outer wall of the test chamber 2. Combined with the closed-loop circulation of the heat circulation pipe 12, the rate of heat loss is effectively reduced, which is beneficial for maintaining the pressure of the heat source test inside the test chamber 2, and can also prevent personnel from being burned. The pressure of the heat source test inside the test chamber 2 meets the requirements of rapid, controllable and uniform heating, and energy saving and consumption reduction.

[0058] In addition to being used as a testing and experimental device for hot air blowers, the embodiments of this utility model can be further expanded to include: production equipment in similar working scenarios such as hot air circulation equipment, drying equipment, and hot air furnaces.

[0059] Based on the embodiments of this utility model described above, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this utility model.

Claims

1. A compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device, comprising a test chamber (2), an adapter (4), a thermal circulation pipe (12), a thermocouple temperature controller (13), a high-efficiency natural gas burner (14), a flame tube (15), and a baffle plate (16); characterized in that, The test chamber (2) is long and cylindrical. The test chamber (2) is installed horizontally. A ring-shaped adapter (4) is installed at the front end of the test chamber (2). A thermocouple temperature controller (13) is installed on the outer wall of the test chamber (2). A high-efficiency natural gas burner (14) is installed horizontally at the rear end of the test chamber (2). A flame tube (15) is installed at the front end of the high-efficiency natural gas burner (14) and extends into the front part of the test chamber (2). A baffle plate (16) is installed at the front end of the flame tube (15). A heat circulation pipe (12) is installed on the test chamber (2). At least the air outlet of the heat circulation pipe (12) extends into the test chamber (2).

2. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, The air inlet of the heat circulation pipe (12) is connected from the top of the front end of the test box (2), and the air outlet of the heat circulation pipe (12) is connected from the top of the rear end of the test box (2). Moreover, an annular inner sealing plate (20) is installed on the inner wall of the test box (2) behind the air inlet of the heat circulation pipe (12). The outer gearbox (9), transmission box (10), inner gearbox (5) and front axle (3) are arranged on the left side of the test box (2) from front to back, which are coaxial with the inner sealing plate (20).

3. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, The test chamber (2) has an annular adapter (4), a machine head base (7), or an inner sealing plate (20) installed inside the left port; the air outlet of the hot circulation pipe (12) is connected to the front end of the test chamber (2), and the air inlet of the hot circulation pipe (12) is connected to the air outlet (106) of the high temperature fan (1) for testing.

4. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, The test chamber (2) has a machine platform (6) suspended at the bottom front side. The rear end of the machine platform (6) is fixedly connected to the front end surface of the test chamber (2). An operating table (19) is set at the bottom of the machine platform (6).

5. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, An air damper (11) is installed on the heat circulation pipe (12).

6. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, The test chamber (2) has a ring-shaped headstock (7) installed on the inner side of the front port. The inner wall of the headstock (7) is lined with an adapter (4). The inner wall of the headstock (7) is lined with a sealing ring (18) on the front side of the headstock (7).

7. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, The air inlet and outlet of the heat circulation pipe (12) and the orthographic projection of the centerline are located between the outer wall of one side of the flame tube (15) and the inner wall of the test chamber (2) on the same side.

8. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, The inner diameters of the heat circulation pipe (12) and the flame pipe (15) are both larger than the inner diameter of the air inlet (105) of the high-temperature fan (1) used for testing, and the difference between the inner diameters of the heat circulation pipe (12) and the flame pipe (15) is less than 1 / 2 of the inner diameter of the air inlet (105) of the high-temperature fan (1) used for testing.

9. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, A heat exchanger connected to a cooling water pipe is installed on the hot circulation pipe (12). At the same time, a compressed air inlet pipe is connected to the test chamber (2), and a pressure gauge is installed inside the test chamber (2).

10. The compact, multi-purpose, energy-saving, safe, high-temperature fan combined testing device according to claim 1, characterized in that, An insulation layer is installed on the outer wall of the test chamber (2).

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