A fluid heat exchange test device

Abstract

The present invention provides a fluid heat exchange test device, which relates to the technical field of fluid test equipment and is designed to solve the current problem of difficulty in sampling dirt inside a narrow slit channel. The fluid heat exchange test device includes a test plate, a support plate, a heating component and a sampling assembly. The support plate and the test plate are stacked and formed to form a narrow slit channel for fluid flow. The heating component is configured to provide heat to the narrow slit channel. The test plate is provided with at least one group of sampling holes, which are connected to the narrow slit channel. The sampling assembly can be detachably mounted on the sampling holes, and the sampling portion of the sampling assembly is flush with the channel surface of the narrow slit channel. The fluid heat exchange test device provided by the present invention can conveniently implement the sampling operation of dirt inside a narrow slit channel.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid testing equipment, and in particular to a fluid heat exchange testing device. Background Art

[0002] In industrial production, we often encounter heat exchange and cooling situations in narrow spaces, such as the heat exchange process of a plate heat exchanger or the heat exchange process of a microelectronic heat exchanger, which transfers heat in or out through the flow of fluid in a narrow channel, thereby completing the heat exchange. The narrow channel of the prior art is generally formed by leaving a gap of 1-3mm between two supporting plates. Compared with a round tube heat exchanger, the plate heat exchanger formed by this narrow channel has a series of advantages such as a more compact structure, a smaller size, and a higher heat exchange efficiency.

[0003] In the process of using narrow slit channels to study fluid heat transfer, when the flowing medium becomes a substance containing a certain amount of negatively soluble salt, a layer of dirt is easily formed on the heat transfer surface of the narrow slit channel. After the dirt adheres to the surface of the narrow slit channel, it will aggravate the deterioration of heat transfer near the dirt, thereby forming more dirt and further aggravating the deterioration of heat transfer. Therefore, how to achieve the sampling of dirt inside the narrow slit channel has become the focus of fluid heat transfer research.

[0004] At present, in order to sample the dirt inside the narrow slit channel, it is often necessary to disassemble the narrow slit channel so that the heat exchange channel is completely exposed to achieve the sampling purpose. However, since it is very inconvenient to disassemble the narrow slit channel, it is currently difficult to sample the dirt inside the narrow slit channel. Summary of the invention

[0005] The purpose of the present invention is to provide a fluid heat exchange test device to solve the current technical problem of the difficulty in sampling dirt inside a narrow channel.

[0006] The fluid heat exchange test device provided by the present invention includes an experimental plate, a supporting plate, a heating component and a sampling assembly. The supporting plate and the experimental plate are stacked to form a narrow slit channel for fluid flow. The heating component is configured to provide heat to the narrow slit channel. The experimental plate is provided with at least one group of sampling holes, which are connected to the narrow slit channel. The sampling assembly can be detachably installed on the sampling holes, and the sampling portion of the sampling assembly is flush with the channel surface of the narrow slit channel.

[0007] Furthermore, the axis of the sampling hole is substantially perpendicular to the surface of the experimental plate, the sampling assembly comprises a boss and a sampling column, the boss is inserted into the sampling hole, the sampling column is detachably connected to the boss, and the surface of the sampling column facing the narrow slit channel forms the sampling portion.

[0008] Furthermore, the sampling column is provided with an external thread, the boss is provided with a threaded hole, and the sampling column is screwed to the boss via the external thread.

[0009] Furthermore, the sampling assembly further comprises a sealing ring, which is disposed between the sampling column and the boss, and the sealing ring is sealingly connected to the hole wall of the sampling hole.

[0010] Furthermore, the sampling holes are provided in a plurality of groups, and the plurality of groups of sampling holes are arranged at intervals along the flow direction of the fluid in the narrow slit channel.

[0011] Furthermore, the fluid heat exchange test device also includes a fixing component, and the fixing component is configured to fix the sampling components in each group of the sampling holes to the experimental plate at the same time.

[0012] Furthermore, the fixing component includes a pressing sheet and a threaded connector, the pressing sheet is pressed on the sampling component, and the threaded connector is configured to fix the pressing sheet to the experimental plate.

[0013] Furthermore, the pressing sheet is provided with a receiving groove, and when the boss of the sampling assembly is installed in place in the sampling hole, one end of the boss away from the narrow slit channel is received in the receiving groove.

[0014] Furthermore, the support plate and the test plate are fixedly connected via the threaded connector.

[0015] Furthermore, the supporting plate is provided with a window, and the fluid heat exchange test device further comprises a transparent plate, wherein the transparent plate is sandwiched between the supporting plate and the test plate, and the narrow slit channel is formed between the transparent plate and the test plate.

[0016] The beneficial effects brought by the fluid heat exchange test device of the present invention are:

[0017] A fluid heat exchange test device mainly composed of an experimental plate, a supporting plate, a heating component and a sampling assembly is set up, wherein the supporting plate and the experimental plate are stacked to form a narrow slit channel for fluid flow; the heating component is used to provide heat to the narrow slit channel; the experimental plate is provided with sampling holes connected to the narrow slit channel, and the sampling holes are at least one group; the sampling assembly can be detachably installed on the sampling hole, and the sampling part of the sampling assembly is flush with the channel surface of the narrow slit channel.

[0018] When the fluid heat exchange test device simulates the heat exchange of the fluid, the heating component is turned on to provide the narrow slit channel with the heat required for the test; when the channel surface temperature of the narrow slit channel reaches the simulation requirement, the fluid flows from one end of the narrow slit channel to the other end to achieve heat exchange simulation. When it is necessary to sample the dirt inside the narrow slit channel, the sampling component can be removed from the sampling hole, and the dirt deposited in the sampling part can be sent for detection.

[0019] By setting a sampling component in the fluid heat exchange test device, when performing heat exchange simulation, the sampling part is flush with the channel surface of the narrow slit channel, so that the flow of the fluid in the narrow slit channel will not be disturbed by the sampling component. When sampling, the dirt sample can be directly taken out from the sampling hole for inspection. Not only is the sampling difficulty small, but also no other treatment is required, avoiding physical damage to the dirt surface, thereby ensuring the morphological integrity of the dirt sample and reducing the scratch damage to the surface of the experimental plate. After sampling is completed, the cleaned sampling component can be installed back into the sampling hole. Not only is the operation convenient, but the sampling component can be reused, avoiding waste and greatly reducing the sampling cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a fluid heat exchange test device provided in an embodiment of the present invention;

[0022] Figure 2 A structural exploded view of a fluid heat exchange test device provided in an embodiment of the present invention;

[0023] Figure 3 A top view of the structure of a fluid heat exchange test device provided by an embodiment of the present invention;

[0024] Figure 4 for Figure 3 AA section view in;

[0025] Figure 5 for Figure 4 A magnified view of the local structure at point B in the middle.

[0026] Description of reference numerals:

[0027] 100-experimental board; 200-supporting board; 300-heating component; 400-insulation board; 500-sampling component; 600-fixing component; 700-transparent board; 800-sealing strip;

[0028] 110 - narrow slit channel; 120 - sampling hole; 130 - upper chamber; 140 - lower chamber; 150 - second connecting hole;

[0029] 210 - window; 220 - third connection hole;

[0030] 310-first hole;

[0031] 410 - second hole;

[0032] 510- boss; 520- sampling column; 530- sealing ring;

[0033] 610-pressing piece; 620-stud; 630-washer; 640-nut;

[0034] 611 - accommodating groove; 612 - first connecting hole. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] Figure 1 The schematic diagram of the structure of the fluid heat exchange test device provided in this embodiment is as follows: Figure 2 The structural exploded diagram of the fluid heat exchange test device provided in this embodiment is as follows: Figure 3 A top view of the structure of the fluid heat exchange test device provided in this embodiment, Figure 4 for Figure 3 AA section view in the figure, Figure 5 for Figure 4 The enlarged view of the local structure at B in the figure. Figures 1 to 5 As shown, this embodiment provides a fluid heat exchange test device, including a test plate 100, a support plate 200 and a heating component 300, wherein the support plate 200 and the test plate 100 are stacked and form a narrow slit channel 110 for fluid flow, the heating component 300 is configured to provide heat to the narrow slit channel 110, and the test plate 100 is provided with at least one group of sampling holes 120, and the sampling holes 120 are connected to the narrow slit channel 110. The fluid heat exchange test device also includes a sampling assembly 500, specifically, the sampling assembly 500 is detachably mounted on the sampling hole 120, and the sampling portion of the assembly is flush with the channel surface of the narrow slit channel 110.

[0037] When the fluid heat exchange test device simulates the heat exchange of the fluid, the heating component is turned on to provide the narrow slit channel 110 with the heat required for the test; when the channel surface temperature of the narrow slit channel 110 reaches the simulation requirement, the fluid flows from the test section inlet of the narrow slit channel 110 to the test section outlet to achieve the heat exchange simulation. When it is necessary to sample the dirt inside the narrow slit channel 110, the sampling component 500 can be taken out of the sampling hole 120, and the dirt deposited in the sampling part can be sent for detection.

[0038] By setting the sampling assembly 500 in the fluid heat exchange test device, when performing heat exchange simulation, the sampling part is flush with the channel surface of the narrow slit channel 110, so that the flow of the fluid in the narrow slit channel 110 will not be disturbed by the sampling assembly 500. When sampling, the dirt sample can be directly taken out from the sampling hole 120 for inspection. Not only is the sampling difficulty small, but also no other treatment is required, avoiding physical damage to the dirt surface, thereby ensuring the morphological integrity of the dirt sample and reducing the scratch damage caused to the surface of the experimental plate 100. After the sampling is completed, the cleaned sampling assembly 500 can be installed back into the sampling hole 120, which is not only convenient to operate, but also the sampling assembly 500 can be reused, avoiding waste and greatly reducing the sampling cost.

[0039] Please continue to refer to Figure 2 In this embodiment, the inlet of the experimental section of the narrow slit channel 110 is connected to the upper chamber 130, and the outlet of the experimental section of the narrow slit channel 110 is connected to the lower chamber 140, wherein the upper chamber 130 and the lower chamber 140 are used to buffer the working fluid entering the narrow slit channel 110 and the working fluid about to flow out of the narrow slit channel 110, so that the working fluid is evenly mixed in the two chambers.

[0040] In this embodiment, the heating component 300 includes a mica heating plate, which is attached to the experimental plate 100 and used to heat the experimental plate 100, thereby supplying heat to the narrow slit channel 110. Specifically, the mica heating plate is formed by pressing two layers of mica plates and metal foil between the plates, and is provided with two terminals (the terminals are not shown in the figure) at one end, which are used to connect the voltage regulator and the power supply to realize the power supply of the mica heating plate.

[0041] Please continue to refer to Figure 2 , Figure 4 and Figure 5 In this embodiment, the fluid heat exchange test device further includes a heat preservation plate 400. Specifically, the heat preservation plate 400 is arranged on the side of the heating component 300 away from the test plate 100 to reduce the heat emitted by the heating component 300 to the surrounding. The heat preservation plate 400 can be made of Teflon insulation material.

[0042] Please continue to refer to Figure 4In this embodiment, a storage space is provided on the side of the test board 100 away from the narrow slit channel 110, wherein the heating component 300 and the heat preservation board 400 are both provided in the storage space. Such a configuration allows the heating component 300 and the heat preservation board 400 to be hidden in the storage space of the test board 100. On the one hand, the heating component 300 and the heat preservation board 400 can be prevented from being exposed, thereby reducing the collision damage of the heating component 300. On the other hand, the overall structure of the fluid heat exchange test device of this embodiment is made more compact.

[0043] Please continue to refer to Figure 2 and Figure 5 Specifically, in this embodiment, the axis of the sampling hole 120 is substantially perpendicular to the surface of the experimental plate 100 , and the sampling assembly 500 includes a boss 510 and a sampling column 520 , the boss 510 is inserted into the sampling hole 120 , and the sampling column 520 is detachably connected to the boss 510 , and the sampling column 520 forms a sampling portion on the surface facing the narrow slit channel 110 .

[0044] This arrangement of directly inserting the boss 510 into the sampling hole 120 facilitates installation and removal of the boss 510. Moreover, by detachably connecting the sampling column 520 to the boss 510, the sampling column 520 becomes a carrier of the dirt sample. This form of sampling using the sampling column 520 allows the sampling column 520 to be directly taken to the corresponding equipment for microscopic examination and analysis after the heat exchange test is completed, thereby avoiding the situation where the dirt sample carrier is too large to be directly examined under the microscope, thereby ensuring the reliability and efficiency of the detection.

[0045] Please continue to refer to Figure 2 In this embodiment, the heating component 300 is provided with a first hole 310 at a position opposite to the sampling hole 120, the insulation plate 400 is provided with a second hole 410 at a position opposite to the sampling hole 120, and the sampling assembly 500 passes through the second hole 410 and the first hole 310 in sequence, so that the sampling column 520 is flush with the channel surface of the narrow slit channel 110.

[0046] Specifically, in this embodiment, the sampling column 520 is provided with an external thread, the boss 510 is provided with a threaded hole, and the sampling column 520 is screwed to the threaded hole of the boss 510 via the external thread.

[0047] By providing an external thread on the outer peripheral surface of the sampling column 520, the sampling column 520 can be threadedly connected to the boss 510. This connection method not only ensures reliable connection and reduces the risk of the sampling column 520 falling off the boss 510, but also, when assembling the sampling component 500, the protruding height of the sampling column 520 can be adjusted by adjusting the effective screwing length of the sampling column 520 and the boss 510, so that after the sampling component 500 is installed in place in the sampling hole 120, the sampling column 520 can remain flush with the channel surface of the narrow slit channel 110, thereby ensuring the reliability of the heat exchange test process.

[0048] Preferably, the sampling column 520 is a sampling screw.

[0049] In other embodiments, the sampling column 520 may also be fixedly disposed on the boss 510 by plugging.

[0050] Please continue to refer to Figure 2 and Figure 5 Specifically, in this embodiment, the sampling assembly 500 may further include a sealing ring 530 , wherein the sealing ring 530 is disposed between the sampling column 520 and the boss 510 , and the sealing ring 530 is sealed and connected to the hole wall of the sampling hole 120 .

[0051] By providing a sealing ring 530 between the sampling column 520 and the boss 510, after the sampling assembly 500 is installed in the sampling hole 120, the gap between the sampling assembly 500 and the sampling hole 120 can be effectively sealed by the sealing ring 530, thereby preventing the working fluid in the narrow slit channel 110 from leaking through the sampling hole 120, thereby ensuring the effect of the heat exchange test.

[0052] In this embodiment, when the sampling assembly 500 is assembled, the sampling column 520 presses the sealing ring 530 tightly against the boss 510 .

[0053] Please continue to refer to Figure 2 Specifically, in this embodiment, five groups of sampling holes 120 are provided, and the five groups of sampling holes 120 are arranged at intervals along the flow direction of the fluid in the narrow slit channel 110. In other words, the five groups of sampling holes 120 are arranged at intervals along the length direction of the narrow slit channel 110.

[0054] By providing five groups of sampling holes 120 spaced apart along the length direction of the narrow slit channel 110 , the sampling assembly 500 can simultaneously sample five positions along the length direction of the narrow slit channel 110 , thereby ensuring the comprehensiveness of the sampling results.

[0055] It should be noted that in this embodiment, only five groups of sampling holes 120 are provided to exemplify the fluid heat exchange test device. In actual use, the test personnel can reasonably select the number of groups of sampling holes 120 according to the specific length of the narrow slit channel 110 and sampling requirements, and this embodiment does not limit this.

[0056] Please continue to refer to Figure 2 Specifically, in this embodiment, each group of sampling holes 120 includes two sampling holes 120, wherein one of the sampling holes 120 in each group is arranged on the center line of the length direction of the narrow slit channel 110, and the other of the sampling holes 120 in each group is arranged on the same side of the center line, and the five sampling holes 120 on the same side of the center line are also arranged along the length direction of the narrow slit channel 110. In this way, sampling can be achieved at multiple positions in the width direction of the narrow slit channel 110, further ensuring the comprehensiveness of the sampling results.

[0057] In this embodiment, among the five sampling holes 120 arranged along the length direction of the narrow slit channel 110, the interval between each two adjacent sampling holes 120 is 100 mm; the interval between the two sampling holes 120 arranged along the width direction of the narrow slit channel 110 is 20 mm.

[0058] It should be noted that, in this embodiment, since the narrow slit channel 110 is symmetrical on both sides of the center line along its length direction, that is, the flow rate, temperature and other characteristics on both sides of the center line are mirror-symmetrical about the center line, it is sufficient to set only one row of sampling holes 120 on one side of the center line. In other embodiments, the setting position of the sampling holes 120 can be specifically selected according to actual conditions, and this embodiment is not limited to this.

[0059] Please continue to refer to Figure 1 Specifically, in this embodiment, the fluid heat exchange test device may further include a fixing component 600 , wherein the fixing component 600 is configured to simultaneously fix the sampling components 500 in each group of sampling holes 120 to the experimental plate 100 .

[0060] The provision of the fixing assembly 600 ensures the stability of the installation of the sampling assembly 500 in the sampling hole 120. Moreover, after the fixing assembly 600 is removed, the sampling assemblies 500 in each group of sampling holes 120 can be taken out at the same time. When the fixing assembly 600 is assembled, the sampling assemblies 500 in each group of sampling holes 120 can be put back at the same time, thereby improving the installation and disassembly efficiency of the sampling assembly 500.

[0061] Please continue to refer to Figure 2 and Figure 5Specifically, in this embodiment, the fixing component 600 includes a pressing piece 610 and a threaded connector, wherein the pressing piece 610 is pressed on the sampling component 500 , and the threaded connector is configured to fix the pressing piece 610 to the experimental board 100 .

[0062] When the sampling assembly 500 needs to be installed in the sampling holes 120, after placing the sampling assembly 500 in each group of sampling holes 120, the pressing sheet 610 can be pressed on each sampling assembly 500, and then the pressing sheet 610 can be fixed to the experimental board 100 using a threaded connector, thereby achieving the fixation of the sampling assembly 500 in the sampling holes 120.

[0063] Please continue to refer to Figure 2 Specifically, in this embodiment, the pressing sheet 610 is provided with first connection holes 612 at both ends along the length direction thereof, the test board 100 is provided with a second connection hole 150 penetrating the board body, the support plate 200 is provided with a third connection hole 220 penetrating the board body, and the threaded connector includes a stud 620, a washer 630 and a nut 640. Among them, along the thickness direction of the test board 100, the first connection hole 612, the second connection hole 150 and the third connection hole 220 are directly opposite.

[0064] When the sampling component 500 is fixed by using the fixing component 600, after the pressing piece 610 is pressed onto the sampling component 500, the stud 620 can be passed through the first connecting hole 612, the second connecting hole 150 and the third connecting hole 220 in sequence, and then the gasket 630 is passed through the stud 620, and then the nut 640 is screwed on both ends of the stud 620, and the gasket 630 is tightened to complete the fixing of the pressing piece 610 on the experimental board 100, thereby achieving the purpose of fixing the sampling component 500 in the sampling hole 120.

[0065] When it is necessary to sample the dirt in the narrow channel 110, the nut 640 at one end of the stud 620 close to the pressing piece 610 is screwed down to release the fastening effect on the pressing piece 610, and the pressing piece 610 can be removed from the experimental board 100, thereby realizing the removal operation of the sampling assembly 500 from the sampling hole 120. This arrangement of the threaded connector allows the sampling assembly 500 to be removed without disassembling the threaded connector, further improving the sampling efficiency and reducing the sampling difficulty.

[0066] Moreover, since the supporting plate 200 and the experimental plate 100 are also fixedly connected by the above-mentioned threaded connector, that is, the second connecting hole 150 of the experimental plate 100 and the third connecting hole 220 of the supporting plate 200 can be utilized to achieve the installation and fixation of the pressing plate 610, there is no need to open additional holes in the experimental plate 100 and the supporting plate 200, thereby further reducing the difficulty and cost of sampling.

[0067] Please continue to refer to Figure 2 and Figure 5 Specifically, in this embodiment, the pressing sheet 610 is provided with a receiving groove 611, wherein, when the boss 510 of the sampling assembly 500 is installed in place in the sampling hole 120, one end of the boss 510 away from the narrow slit channel 110 is received in the receiving groove 611. Such an arrangement can achieve avoidance of the boss 510 and ensure the installation stability of the sampling assembly 500.

[0068] Please continue to refer to Figures 1 to 3 Specifically, in this embodiment, the supporting plate 200 is provided with a window 210, and the fluid heat exchange test device further includes a transparent plate 700, wherein the transparent plate 700 is sandwiched between the supporting plate 200 and the test plate 100, and the narrow slit channel 110 is formed between the transparent plate 700 and the test plate 100.

[0069] By opening a window 210 on the supporting plate 200 and setting a transparent plate 700 between the supporting plate 200 and the experimental plate 100, during the heat exchange test of the fluid heat exchange test device, the test personnel can observe the test process through the window 210 and the transparent plate 700, that is, the fluid heat exchange test device can combine visualization means to dynamically observe the dirt deposition process on the sampling component 500 during the test, making the sampling process more convenient and flexible.

[0070] Preferably, the transparent plate 700 is a quartz glass plate.

[0071] Please continue to refer to Figures 1 to 3 Specifically, the support plate 200 is provided with a plurality of windows 210, and the plurality of windows 210 are arranged at intervals along the length direction of the narrow slit channel 110. Such an arrangement can realize visualization of the test process without reducing the structural strength of the support plate 200, so that the support plate 200 can be well attached to the test plate 100, and the warping deformation of the support plate 200 is reduced.

[0072] Please continue to refer to Figure 2 Specifically, in this embodiment, the fluid heat exchange test device further includes a sealing strip 800, wherein the sealing strip 800 is disposed between the transparent plate 700 and the test plate 100, and the sealing strip 800 is disposed around the narrow slit channel 110. By disposing the sealing strip 800 between the transparent plate 700 and the test plate 100, the sealing property of the narrow slit channel 110 is ensured, and the working fluid in the narrow slit channel 110 is prevented from leaking from between the transparent plate 700 and the test plate 100.

[0073] In this embodiment, the fluid heat exchange test device also includes a thermocouple (not shown in the figure) for collecting temperature data during the heat exchange process. Specifically, the thermocouple can be a thin bare wire, one row is arranged between the heating component 300 and the test board 100, and the other row is arranged in the narrow slit channel 110 between the transparent plate 700 and the test board 100. Using the thermocouple, the wall temperature and fluid temperature distribution along the length of the narrow slit channel 110 can be measured.

[0074] The fluid heat exchange test device can provide a theoretical basis for the design of the reactor under accident conditions and ensure the safety of the reactor during the long-term cooling stage under accident conditions.

[0075] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

[0076] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0077] In the above embodiments, the descriptions of directions such as “upper” and “lower” are all based on the drawings.

[0078] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fluid heat exchange test device, comprising a test plate (100), a support plate (200) and a heating component (300), wherein the support plate (200) and the test plate (100) are stacked to form a narrow slit channel (110) for fluid flow, and the heating component (300) is configured to provide heat to the narrow slit channel (110), characterized in that: The experimental plate (100) is provided with at least one group of sampling holes (120), wherein the sampling holes (120) are in communication with the narrow slit channel (110), and the fluid heat exchange test device further comprises a sampling assembly (500), wherein the sampling assembly (500) is detachably mounted on the sampling holes (120), and a sampling portion of the sampling assembly (500) is flush with a channel surface of the narrow slit channel (110); The axis of the sampling hole (120) is substantially perpendicular to the surface of the experimental plate (100); the sampling assembly (500) comprises a boss (510) and a sampling column (520); the boss (510) is inserted into the sampling hole (120); the sampling column (520) is detachably connected to the boss (510); and the surface of the sampling column (520) facing the narrow slit channel (110) forms the sampling portion; The sampling holes (120) are provided in a plurality of groups, and the plurality of groups of sampling holes (120) are arranged at intervals along the flow direction of the fluid in the narrow slit channel (110); The fluid heat exchange test device further comprises a fixing assembly (600), wherein the fixing assembly (600) is configured to simultaneously fix the sampling assemblies (500) in each group of the sampling holes (120) to the experimental plate (100).

2. The fluid heat exchange test device according to claim 1, characterized in that: The sampling column (520) is provided with an external thread, the boss (510) is provided with a threaded hole, and the sampling column (520) is screwed to the boss (510) via the external thread.

3. The fluid heat exchange test device according to claim 1, characterized in that: The sampling assembly (500) further comprises a sealing ring (530), wherein the sealing ring (530) is arranged between the sampling column (520) and the boss (510), and the sealing ring (530) is sealingly connected to the hole wall of the sampling hole (120).

4. The fluid heat exchange test device according to claim 1, characterized in that: The fixing assembly (600) comprises a pressing sheet (610) and a threaded connector, wherein the pressing sheet (610) is pressed on the sampling assembly (500), and the threaded connector is configured to fix the pressing sheet (610) to the experimental plate (100).

5. The fluid heat exchange test device according to claim 4, characterized in that: The pressing sheet (610) is provided with a receiving groove (611). When the boss (510) of the sampling assembly (500) is installed in place in the sampling hole (120), one end of the boss (510) away from the narrow slit channel (110) is received in the receiving groove (611).

6. The fluid heat exchange test device according to claim 5, characterized in that: The support plate (200) and the test plate (100) are fixedly connected via the threaded connection piece.

7. The fluid heat exchange test device according to any one of claims 1 to 4, characterized in that: The supporting plate (200) is provided with a window (210), and the fluid heat exchange test device further comprises a transparent plate (700), wherein the transparent plate (700) is sandwiched between the supporting plate (200) and the test plate (100), and the narrow slit channel (110) is formed between the transparent plate (700) and the test plate (100).

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