Ejecting type laminated micro-channel throttling refrigeration device

Abstract

The invention belongs to the technical field of throttling refrigeration, and particularly relates to an injection type laminated micro-channel throttling refrigeration device. The device comprises an upper cover plate, a plurality of layers of high-pressure plate sheets, a plurality of layers of low-pressure plate sheets and a lower cover plate, the high-pressure plate sheet is sequentially provided with an inlet section, a regenerative heat exchange section, an injection section, a secondary throttling section and an evaporation cavity in the length direction; the injection section comprises a cross-row cylinder group, a nozzle, a mixing chamber and a diffusion chamber are formed in the high-pressure plate, injection channels are formed in the two sides of the mixing chamber, and the injection channels communicate with the evaporation cavity; and a trapezoidal channel is formed in the evaporation cavity and communicates with the mixing chamber through an injection channel. The lost kinetic energy in the throttling process is fully utilized through the ejector, the process approaches to the isentropic process, the system efficiency is greatly improved, and compared with a traditional isentropic throttling structure, the inlet pressure requirement can be effectively lowered. The structural form that multiple layers of plates are staggered and stacked is adopted, and the refrigerant flow and the refrigerating capacity can be amplified in parallel.

Description

Technical Field

[0001] This invention belongs to the field of throttling refrigeration technology, and in particular relates to an ejector-type stacked microchannel throttling refrigeration device. Background Technology

[0002] Miniature throttling refrigerators are characterized by their simple structure, small size, and rapid cooling, making them widely used in medical, military, and industrial fields such as infrared detectors, cryosurgery probes, missile guidance systems, and electronic equipment cooling. The mainstream Joule-Thomson refrigerator is a Hampson-type refrigerator that uses spiral finned tubes as a counter-current heat exchanger. However, because it can only have one or two channels, its cooling capacity is relatively small, and the central spindle occupies a large volume, affecting its compactness.

[0003] In recent years, with the development of microchannel technology, microchannel Joule-Thomson throttling refrigerators have been widely researched and applied. Existing microchannel throttling refrigerators mainly consist of four parts: an inlet section, a regenerative heat exchange section, a throttling section, and an expansion chamber. These four parts are etched onto a single plate to form a high-pressure channel plate and a low-pressure channel plate. After passing through the high-pressure microchannel layer, the high-pressure gas is pre-cooled by the low-pressure return gas in the adjacent low-pressure channel. After further cooling in the throttling section, it enters the evaporator, absorbs the load heat flow, and then returns through the low-pressure channel.

[0004] Under adiabatic conditions, when high-pressure gas flows through throttling structures such as porous plugs, orifices, very small valves, and capillary tubes, it loses most of its pressure and experiences a temperature change. This phenomenon is called the Joule-Thomson effect. This process is isenthalpic and severely irreversible; however, the kinetic energy generated during gas expansion is wasted. Current microchannel Joule-Thomson throttling refrigerators still use traditional isenthalpic throttling methods, resulting in low energy utilization and an inability to fully utilize the kinetic energy lost during throttling. If this energy loss could be recovered and utilized, system efficiency would be greatly improved.

[0005] Furthermore, in terms of material selection, to ensure the processing accuracy of the microchannels and prevent axial thermal conduction of solid materials, silicon wafers with good plasticity and poor thermal conductivity are generally selected for fabrication. However, due to the low hardness of silicon wafers, the pressure-bearing capacity of the cooler is limited, restricting the temperature range of the cold end. At the same time, the microchannel cooler plates made of silicon wafers cannot be stacked on top of each other, resulting in a smaller refrigerant flow rate and lower cooling capacity.

[0006] In summary, existing Joule-Thomson throttling refrigerators have the following problems: first, kinetic energy is wasted during the isenthalpic throttling process, resulting in low energy utilization; second, the cooling capacity is low, and the heat exchange efficiency needs to be improved. Summary of the Invention

[0007] To address the technical problems existing in the background art, the present invention provides an ejector-type stacked microchannel throttling cooling device.

[0008] To achieve the above objectives, the technical solution provided by the present invention is as follows: An ejector-type stacked microchannel throttling cooling device includes an upper cover plate, a lower cover plate, and a plate group disposed between the two, characterized in that: the plate group is composed of several high-pressure plates and several low-pressure plates stacked alternately. The high-pressure plate is provided with an inlet section, a heat exchange section, an ejector section, a secondary throttling section and an evaporation chamber in sequence along its length; The ejector section includes a group of forked cylinders fixedly connected to the high-pressure plate flow channel. The high-pressure plate has nozzles and a mixing chamber. The nozzles are connected to the mixing chamber. Ejector channels are opened on both sides of the mixing chamber and are connected to the mixing chamber. The outlet of the ejector channel is connected to the evaporation chamber. The high-pressure plate also has a diffuser chamber. The inlet of the diffuser chamber is connected to the mixing chamber, and the outlet of the diffuser chamber is connected to the secondary throttling section. The low-pressure plates are arranged sequentially along their length as an outlet section, a regenerating heat exchange section, and an evaporation chamber, with the low-pressure plates and high-pressure plates arranged alternately. Optionally, the evaporation chamber is provided with a through first trapezoidal channel, which is connected to the secondary throttling section.

[0009] Optionally, the secondary throttling section includes a first row of cylindrical groups fixedly connected to the high-pressure plate flow channel, and also includes several rectangular flow channels opened on the high-pressure plate, the rectangular flow channels being connected to the trapezoidal channel.

[0010] Optionally, the regenerative heat exchange section includes several first heat exchange channels opened on the high-pressure plate, the outlet of the first heat exchange channel is connected to the nozzle, and the inlet of the first heat exchange channel is connected to the inlet section.

[0011] Optionally, the regenerating heat exchange section of the high-pressure plate is provided with several raindrop-shaped micro-needle ribs, and the fluid flows through the gaps between the raindrop-shaped micro-needle ribs.

[0012] Optionally, the inlet section includes an inlet groove, a first high-pressure air inlet hole penetrating the high-pressure plate, and a first low-pressure exhaust hole. A second row of cylindrical groups is fixedly connected to the inlet groove, and the inlet groove communicates with the first high-pressure air inlet hole.

[0013] Optionally, the evaporation chamber includes a second trapezoidal channel that is connected to the first trapezoidal channel, and the regenerative heat exchange section includes several second heat exchange channels. The inlet of the second heat exchange channel is connected to the second trapezoidal channel, and the outlet of the second heat exchange channel is connected to the outlet section.

[0014] Optionally, the outlet section includes an outlet groove, a second low-pressure exhaust port and a second high-pressure intake port that penetrate the low-pressure plate, a third row of cylindrical groups fixedly connected to the outlet groove, the outlet of the outlet groove communicating with the second low-pressure exhaust port, and the inlet of the outlet groove communicating with the second heat exchange channel.

[0015] Optionally, a high-pressure air intake pipe is fixedly connected to the outer end of the upper cover plate, and the high-pressure air intake pipe is connected to the first high-pressure air intake hole. A low-pressure exhaust pipe is fixedly connected to the outer end of the lower cover plate, and the low-pressure exhaust pipe is connected to the first low-pressure exhaust hole.

[0016] The present invention has the following advantages and beneficial effects: In this invention, energy recovery during the throttling process is achieved through an ejector. The high-speed gas flow generated after the high-pressure gas undergoes primary throttling through the nozzle can absorb some of the low-pressure gas flowing back into the evaporation chamber via the ejector channel, forming a mixed gas in the mixing chamber. This mixed gas then undergoes secondary throttling after reaching a certain pressure in the diffuser chamber. This structure, due to the presence of the ejector, fully utilizes the kinetic energy lost during throttling, making the process approach an isentropic process, significantly improving system efficiency compared to traditional isenthalpic throttling. Simultaneously, the ejector channel is connected to the evaporation chamber, allowing some low-pressure fluid to flow into the ejector section through the trapezoidal channel for further throttling, further enhancing energy utilization efficiency. At the same cold-end temperature, the inlet pressure requirement can be effectively reduced, saving refrigeration costs. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of the ejector-type stacked microchannel throttling refrigeration device in this invention; Figure 2 This is an exploded view of the ejector-type stacked microchannel throttling cooling device in this invention; Figure 3 This is a structural diagram of the high-voltage plate in this invention; Figure 4 This is a structural diagram of the low-pressure plate in this invention; Figure 5 This is a schematic diagram of the structure of the high-pressure plate regenerative heat exchange section using raindrop-shaped micro-needle ribs in this invention; Figure 6 This is a schematic diagram of the raindrop-shaped micro-needle rib structure used in the low-pressure plate regeneration heat exchange section of the present invention.

[0018] Reference numerals: 1. High-pressure plate; 11. Inlet section; 111. First high-pressure air inlet; 112. First low-pressure exhaust port; 113. Second parallel cylindrical group; 114. Inlet groove; 12. Regenerating heat exchange section; 121. First heat exchange channel; 122. Raindrop-shaped micro-needle rib; 13. Ejector section; 131. Forked cylindrical group; 132. Nozzle; 133. Mixing chamber; 134. Diffuser chamber; 135. Ejector channel; 14. Secondary throttling section; 141. First 1. Row of cylindrical sections; 142. Rectangular flow channel; 15. Evaporation chamber; 151. First trapezoidal channel; 2. Low-pressure plate; 21. Outlet section; 211. Outlet groove; 212. Second low-pressure exhaust port; 213. Second high-pressure air inlet port; 214. Third row of cylindrical sections; 22. Regenerative heat exchange section; 221. Second heat exchange flow channel; 23. Evaporation chamber; 231. Second trapezoidal channel; 3. Upper cover plate; 31. High-pressure air inlet pipe; 4. Lower cover plate; 41. Low-pressure exhaust pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] Example 1 like Figures 1-4 As shown, an ejector-type stacked microchannel throttling refrigeration device includes an upper cover plate 3, a lower cover plate 4, and a plate assembly disposed between the two. The plate assembly is characterized by being composed of alternating layers of high-pressure plates 1 and low-pressure plates 2. The entire throttling refrigeration device is formed by multiple layers of high-pressure plates 1 and low-pressure plates 2 stacked alternately. An upper cover plate 3 and a lower cover plate 4 of a certain thickness are respectively arranged on the outermost sides of the high and low pressure channels formed by the multiple plates.

[0022] like Figure 3 As shown, the high-pressure plate 1 is provided with an inlet section 11, a heat exchange section 12, an ejector section 13, a secondary throttling section 14 and an evaporation chamber 15 in sequence along its length.

[0023] High-pressure gas enters multiple parallel-stacked and spaced-apart high-pressure plates 1 through the inlet section 11 of the high-pressure plate 1. On the high-pressure plate 1, it sequentially passes through a regenerating heat exchange section 12, an ejector section 13, and a secondary throttling section 14 before entering the evaporation chamber 15. After absorbing heat from the heat load in the evaporation chamber 15, it enters multiple parallel-stacked and spaced-apart low-pressure plates 2, and finally exits the refrigeration unit from the low-pressure plates 2. The multiple high-pressure plates 1 and multiple low-pressure plates 2 are arranged alternately, and different numbers of high- and low-pressure plates can be selected according to different refrigeration requirements.

[0024] like Figure 3 As shown, the ejector section 13 is the core innovative part of this invention, including a group of forked cylinders 131 fixedly connected to the flow channel of the high-pressure plate 1. The group of forked cylinders 131 is located at the inlet of the ejector section 13, has a certain density, and serves to guide the flow and support the structure of the refrigeration device specimen. The key structure of the ejector section 13 is the ejector, and the high-pressure plate 1 has a nozzle 132, a mixing chamber 133, and a diffuser chamber 134. The nozzle 132 is connected to the mixing chamber 133, which is equivalent to the first stage of throttling in a traditional multi-stage throttling device. The high-speed airflow at the outlet of the nozzle 132 can absorb part of the low-pressure gas flowing back into the evaporation chamber 15 through the ejector channel 135, making full use of the kinetic energy lost during the throttling process and improving the system efficiency. Ejector channels 135 are provided on both sides of the mixing chamber 133, and the ejector channels 135 are connected to the mixing chamber 133. The outlet of the ejector channel 135 is connected to the evaporation chamber 15. A high-speed, low-pressure airflow mixes with low-pressure gas ejected from the evaporator chamber 15 within the mixing chamber 133, forming a mixture. This mixture then passes through the diffuser chamber 134 to reach a certain pressure. Compared to traditional isenthalpic throttling, this ejector-type throttling method effectively reduces the inlet pressure requirement, saves refrigeration costs, and makes the throttling process closer to an isentropic process. The inlet of the diffuser chamber 134 is connected to the mixing chamber 133, and the outlet of the diffuser chamber 134 is connected to the secondary throttling section 14.

[0025] like Figure 4 As shown, the low-pressure plate 2 is provided with an outlet section 21, a heat exchange section 22 and an evaporation chamber 23 in sequence along its length, and the low-pressure plate 2 and the high-pressure plate 1 are arranged alternately.

[0026] Furthermore, such as Figure 3 As shown, the evaporation chamber 15 has a trapezoidal structure, and a through first trapezoidal channel 151 is provided inside the evaporation chamber 15. The low-temperature gas after secondary throttling enters the evaporation chamber 15. The first trapezoidal channel 151 is connected to the mixing chamber 133 through the ejector channel 135. Inside the evaporation chamber 15, part of the low-pressure fluid can flow back into the mixing chamber 133 through the first trapezoidal channel 151 and the ejector channel 135 for further throttling, while the other part flows into the low-pressure channel of the low-pressure plate 2 to pre-cool the gas in the high-pressure plate 1.

[0027] Furthermore, the secondary throttling section 14 includes a first row of cylindrical groups 141 fixedly connected to the flow channel of the high-pressure plate 1. These first row of cylindrical groups 141 are located at the inlet of the secondary throttling section 14 and have a certain density, serving to guide flow and support the refrigeration device. The secondary throttling section 14 also includes several rectangular flow channels 142 formed on the high-pressure plate 1, which communicate with the diffuser chamber 134. The mixed gas exiting the diffuser chamber 134 flows into these smaller rectangular flow channels 142 for secondary throttling to achieve a lower temperature.

[0028] Furthermore, such as Figure 3 As shown, the regenerating heat exchange section 12 includes several first heat exchange channels 121 formed on the high-pressure plate 1. Each first heat exchange channel 121 is a plurality of parallel rectangular channels. After the high-pressure gas enters the high-pressure plate 1, it first undergoes heat exchange and pre-cooling with the low-temperature, low-pressure return gas in the adjacent low-pressure plate 2 in the regenerating heat exchange section 12. The inlet of the first heat exchange channel 121 is connected to the inlet section 11, and the outlet of the first heat exchange channel 121 is connected to the nozzle 132.

[0029] Furthermore, such as Figure 3 As shown, the inlet section 11 includes an inlet groove 114, a first high-pressure inlet hole 111 penetrating the high-pressure plate 1, and a first low-pressure exhaust hole 112. The first high-pressure inlet hole 111 is a high-pressure gas inlet, and its penetrating structure allows fluid to flow into adjacent high-pressure plates 1. The first low-pressure exhaust hole 112 is a low-pressure gas exhaust hole, and its penetrating structure allows fluids from different low-pressure plates 2 to converge here and exit the refrigeration device. A second row of cylindrical columns 113 is fixedly connected to the inlet groove 114. The second row of cylindrical columns 113 has a certain density and is used to guide the working gas and support the specimen structure. The inlet groove 114 communicates with the first high-pressure inlet hole 111.

[0030] Furthermore, such as Figure 4 As shown, the evaporator chamber 23 includes a second trapezoidal channel 231, which is connected to the first trapezoidal channel 151. The evaporator chamber 23 operates on the same principle as the evaporator chamber 15 in the high-pressure plate 1, absorbing heat from the heat load to evaporate the low-temperature refrigerant into a low-pressure gas. The regenerative heat exchange section 22 includes several second heat exchange channels 221. The inlet of each second heat exchange channel 221 is connected to the second trapezoidal channel 231, and the outlet of each second heat exchange channel 221 is connected to the outlet section 21. The regenerative heat exchange section 22 uses multiple larger parallel rectangular channels, which can simultaneously pre-cool the regenerative heat exchange section 12, the ejector section 13, and the secondary throttling section 14 of the high-pressure plate 1, improving heat exchange efficiency and ensuring sufficient pre-cooling of the high-pressure gas.

[0031] Furthermore, such as Figure 4As shown, the outlet section 21 includes an outlet groove 211, a second low-pressure exhaust port 212 penetrating the low-pressure plate 2, and a second high-pressure inlet port 213. A third row of cylindrical columns 214 is fixedly connected to the outlet groove 211, which serves for guiding and supporting the flow. The outlet of the outlet groove 211 communicates with the second low-pressure exhaust port 212, and the inlet of the outlet groove 211 communicates with the second heat exchange channel 221. Low-pressure gas is discharged from the refrigeration unit through the second low-pressure exhaust port 212.

[0032] Furthermore, such as Figure 1 As shown, a high-pressure air inlet pipe 31 is fixedly connected to the outer end of the upper cover plate 3. The high-pressure air inlet pipe 31 is connected to the first high-pressure air inlet port 111, and high-pressure gas enters the refrigeration device through the high-pressure air inlet pipe 31. A low-pressure exhaust pipe 41 is fixedly connected to the outer end of the lower cover plate 4. The low-pressure exhaust pipe 41 is connected to the first low-pressure exhaust port 112, and low-pressure gas is discharged from the refrigeration device through the low-pressure exhaust pipe 41. This structure facilitates the connection of the refrigeration device with an external air source and exhaust system, improving the practicality of the device.

[0033] like Figures 1-4 As shown, the refrigeration principle of the ejector-type stacked microchannel throttling refrigeration device in this embodiment is as follows: High-pressure gas enters from the high-pressure inlet pipe 31, passes through the first high-pressure inlet hole 111 and enters the inlet groove 114 of the inlet section 11. Under the flow around the second row of cylindrical groups 113, it enters the high-pressure gas reheat exchange section 12, where it undergoes pre-cooling heat exchange with the return gas in the adjacent low-pressure plate 2 channel. The pre-cooled high-pressure gas enters the ejector section 13, and the high-pressure gas passes through the nozzle 132 of the ejector section 13, which is equivalent to a throttling process, reducing pressure and temperature and increasing speed. The high-speed airflow absorbs the low-pressure gas ejected back from the evaporation chamber 15 through the first trapezoidal channel 151 and the ejector channel 135, mixes in the mixing chamber 133, and then diffuses in the diffuser chamber 134 to reach a certain pressure mixed gas. The mixed gas undergoes secondary throttling and cooling within the rectangular flow channel 142 of the secondary throttling section 14, reaches the phase change temperature zone within the evaporation chamber 15, and finally flows back as low-temperature, low-pressure gas in the channel of the low-pressure plate 2 to pre-cool the high-pressure incoming flow, and is finally discharged from the refrigeration unit through the second low-pressure exhaust port 212.

[0034] Considering the need for high-pressure throttling of the working fluid during operation, high-pressure resistant stainless steel was selected for this part. The throttling refrigeration device is composed of the aforementioned multi-layer stainless steel plates. To ensure overall high-pressure resistance, a diffusion fusion welding process is used to weld them in a high-temperature furnace, which also minimizes the contact thermal resistance between the plates. The channel portion of the multi-layer microchannel throttling refrigeration device uses stainless steel sheets with a thickness of 0.2–0.3 mm. Rectangular channels, trapezoidal channels, and cylindrical structures of a certain depth are etched onto the plates using laser etching technology.

[0035] The throttling working fluid can be selected from suitable gases such as nitrogen, argon, air, and carbon dioxide at different initial pressures according to different levels of refrigeration requirements.

[0036] In this invention, two throttling processes are achieved through an ejector. The high-pressure gas, after being throttled once by nozzle 132, generates a high-speed airflow that absorbs the low-pressure gas in the evaporation chamber 15 through ejector channel 135. This fully utilizes the kinetic energy lost during throttling, making the process approach an isentropic process and improving system efficiency. Compared to traditional multi-stage throttling structures, this effectively reduces inlet pressure and saves refrigeration costs. It also effectively improves the overall structural compactness and pre-cooling heat exchange effect. The multi-channel parallel, multi-layer stacked structure allows for parallel amplification of the refrigeration capacity of the refrigeration device.

[0037] Example 2 The only difference between this embodiment and Embodiment 1 is the structure of the regenerating heat exchange section 12.

[0038] like Figure 5 As shown, the regenerating heat exchange section 12 of the high-pressure plate 1 is provided with several raindrop-shaped micro-needle ribs 122, through which fluid flows. The raindrop-shaped micro-needle ribs 122 can increase the heat exchange area and further enhance the pre-cooling heat exchange effect. This raindrop-shaped micro-needle rib structure can reduce pressure loss while enhancing pre-cooling heat exchange, ensuring greater pressure in the subsequent throttling process, thereby providing stronger throttling power and improving overall cooling efficiency.

[0039] like Figure 6 As shown, as an optional technical solution, the regenerating heat exchange section 22 of the low-pressure plate 2 can also be provided with several raindrop-shaped micro-needle ribs 222. The fluid flows through the gaps between the raindrop-shaped micro-needle ribs 222, which can also reduce pressure loss and improve the pre-cooling effect while enhancing heat exchange.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An ejector-type stacked microchannel throttling cooling device, comprising an upper cover plate (3), a lower cover plate (4), and a plate assembly disposed between the two, characterized in that: The plate group is composed of several high-voltage plates (1) and several low-voltage plates (2) stacked alternately; The high-pressure plate (1) is provided with an inlet section (11), a heat exchange section (12), an ejector section (13), a secondary throttling section (14), and an evaporation chamber (15) in sequence along its length. The ejector section (13) includes a forked cylindrical group (131) fixedly connected to the flow channel of the high-pressure plate (1). The high-pressure plate (1) is provided with a nozzle (132) and a mixing chamber (133). The nozzle (132) is connected to the mixing chamber (133). An ejector channel (135) is provided on both sides of the mixing chamber (133), and the ejector channel (135) is connected to the mixing chamber (133). The outlet of the ejector channel (135) is connected to the evaporation chamber (15). The high-pressure plate (1) is also provided with a diffuser chamber (134). The inlet of the diffuser chamber (134) is connected to the mixing chamber (133), and the outlet of the diffuser chamber (134) is connected to the secondary throttling section (14). The low-pressure plate (2) is provided with an outlet section (21), a heat exchange section (22) and an evaporation chamber (23) in sequence along its length. The low-pressure plate (2) and the high-pressure plate (1) are arranged alternately.

2. The ejector-type stacked microchannel throttling cooling device according to claim 1, characterized in that: The evaporation chamber (15) is provided with a through first trapezoidal channel (151), which is connected to the secondary throttling section (14).

3. The ejector-type stacked microchannel throttling cooling device according to claim 2, characterized in that: The secondary throttling section (14) includes a first row of cylindrical groups (141) fixedly connected to the flow channel of the high-pressure plate (1), and also includes several rectangular flow channels (142) opened on the high-pressure plate (1), the rectangular flow channels (142) being connected to the trapezoidal channel (151).

4. The ejector-type stacked microchannel throttling cooling device according to claim 1, characterized in that: The regenerative heat exchange section (12) includes a plurality of first heat exchange channels (121) opened on the high-pressure plate (1). The outlet of the first heat exchange channel (121) is connected to the nozzle (132), and the inlet of the first heat exchange channel (121) is connected to the inlet section (11).

5. The ejector-type stacked microchannel throttling cooling device according to claim 1, characterized in that: The heat exchange section (12) of the high-pressure plate (1) is provided with a number of raindrop-shaped micro needle ribs (122), and the fluid flows through the gaps between the raindrop-shaped micro needle ribs (122).

6. The ejector-type stacked microchannel throttling cooling device according to claim 1, characterized in that: The inlet section (11) includes an inlet groove (114), a first high-pressure air inlet (111) penetrating the high-pressure plate (1) and a first low-pressure exhaust port (112). A second row of cylindrical groups (113) is fixedly connected to the inlet groove (114), and the inlet groove (114) is connected to the first high-pressure air inlet (111).

7. The ejector-type stacked microchannel throttling cooling device according to claim 1, characterized in that: The evaporation chamber (23) includes a second trapezoidal channel (231), which is connected to the first trapezoidal channel (151). The heat exchange section (22) includes a plurality of second heat exchange channels (221), the inlet of the second heat exchange channel (221) is connected to the second trapezoidal channel (231), and the outlet of the second heat exchange channel (221) is connected to the outlet section (21).

8. The ejector-type stacked microchannel throttling cooling device according to claim 7, characterized in that: The outlet section (21) includes an outlet groove (211), a second low-pressure exhaust port (212) penetrating the low-pressure plate (2), and a second high-pressure air inlet port (213). A third row of cylindrical groups (214) is fixedly connected to the outlet groove (211). The outlet of the outlet groove (211) is connected to the second low-pressure exhaust port (212), and the inlet of the outlet groove (211) is connected to the second heat exchange channel (221).

9. The ejector-type stacked microchannel throttling cooling device according to claim 1, characterized in that: The upper cover plate (3) is fixedly connected to a high-pressure air inlet pipe (31) at its outer end. The high-pressure air inlet pipe (31) is connected to the first high-pressure air inlet hole (111). The lower cover plate (4) is fixedly connected to a low-pressure exhaust pipe (41) at its outer end. The low-pressure exhaust pipe (41) is connected to the first low-pressure exhaust hole (112).

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