阅读说明：本技术 一种干冰升华冷却喷雾腔室装置 (Dry ice sublimation cooling spraying chamber device ) 是由 王为术 徐维晖 任坤朋 李运泽 牛靖尊 姚紫琨 岳晓明 尚梦源 翟禹鑫 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种干冰升华冷却喷雾腔室装置,由干冰喷雾腔室与保温外壳内外嵌套组合成；保温外壳在入口处设有向下延伸的喷嘴管,喷嘴管的内径处形成喷嘴通道；干冰喷雾腔室由通孔套在喷嘴管上,且通孔与喷嘴管之间留有回流间隙,回流间隙处设有分流结构；干冰喷雾腔室的顶部及侧部与保温外壳之间留有间隙,间隙处形成出口环形通道；保温外壳的底部设有与出口环形通道连通的出口；干冰喷雾腔室的顶部设有向下的导流座,导流座上设有锥形内通道,锥形内通道与喷嘴管的类锥形外轮廓形成渐扩型回流通道；导流座与干冰喷雾腔室的顶部也留有间隙,间隙处与干冰喷雾腔室连通形成回流环形通道。本发明能够提高干冰喷雾冷却效率,节约干冰用量。(The invention discloses a dry ice sublimation cooling spraying chamber device, which is formed by combining a dry ice spraying chamber and a heat-insulating shell in an internally-externally nested manner; a nozzle pipe extending downwards is arranged at an inlet of the heat-insulating shell, and a nozzle channel is formed at the inner diameter of the nozzle pipe; the dry ice spraying chamber is sleeved on the nozzle pipe through a through hole, a backflow gap is reserved between the through hole and the nozzle pipe, and a flow distribution structure is arranged at the backflow gap; gaps are reserved between the top and the side of the dry ice spraying chamber and the heat preservation shell, and an outlet annular channel is formed in the gaps; the bottom of the heat-insulating shell is provided with an outlet communicated with the outlet annular channel; a downward flow guide seat is arranged at the top of the dry ice spraying chamber, a conical inner channel is arranged on the flow guide seat, and the conical inner channel and the similar conical outer contour of the nozzle pipe form a gradually-expanding type backflow channel; a gap is also reserved between the flow guide seat and the top of the dry ice spraying chamber, and the gap is communicated with the dry ice spraying chamber to form a backflow annular channel. The invention can improve the dry ice spraying cooling efficiency and save the dry ice consumption.)

1. A dry ice sublimation cooling spraying chamber device which is characterized in that: the dry ice sublimation cooling spraying chamber device is formed by combining a dry ice spraying chamber and a heat preservation shell in an internally-externally nested manner, and a heat source is positioned at the bottom of the dry ice spraying chamber;

the heat-insulating shell is provided with an inlet, the heat-insulating shell is provided with a nozzle pipe extending downwards at the inlet, a nozzle channel is formed at the inner diameter of the nozzle pipe, and the outer diameter of the nozzle pipe forms a conical outer profile with a small upper part and a large lower part; the dry ice nozzle enters the dry ice spraying chamber through the inlet and the nozzle channel, and the dry ice nozzle is wrapped by the nozzle channel;

the top of the dry ice spraying chamber is provided with a through hole, the dry ice spraying chamber is sleeved on the nozzle pipe through the through hole, a backflow gap is reserved between the through hole and the nozzle pipe, and a flow dividing structure is arranged at the backflow gap to control the gas backflow amount;

gaps are reserved between the top and the side of the dry ice spraying chamber and the heat preservation shell, and an outlet annular channel is formed in the gaps; the bottom of the heat-insulating shell is provided with an outlet communicated with the outlet annular channel;

the top of the dry ice spraying chamber is provided with a downward flow guide seat, the flow guide seat is provided with a conical inner channel, the flow guide seat is sleeved outside the nozzle pipe through the conical inner channel, and the conical inner channel and the similar conical outer contour of the nozzle pipe form a gradually-expanded type backflow channel; a gap is also reserved between the flow guide seat and the top of the dry ice spraying chamber, and the gap is communicated with the dry ice spraying chamber to form a backflow annular channel.

2. A dry ice sublimation cooling spray chamber apparatus as claimed in claim 1, wherein: the shunting structure comprises two semicircular annular shunting plates, the two semicircular annular shunting plates are located on the upper side of the top of the dry ice spraying chamber and located on two sides of the nozzle pipe respectively, and the two semicircular annular shunting plates are close to or far away from each other to reduce or enlarge the backflow gap.

3. A dry ice sublimation cooling spray chamber apparatus as claimed in claim 2, wherein: the two semicircular annular splitter plates are respectively connected with a grab handle extending upwards, a horizontal sliding groove is arranged at the position, corresponding to the grab handle, on the heat insulation shell, and the grab handles respectively penetrate through the corresponding horizontal sliding grooves.

4. A dry ice sublimation cooling spray chamber apparatus according to any one of claims 1-3, wherein: the conical outer contour of the nozzle pipe is composed of a cylindrical section at the upper part and a conical section at the lower part, a through hole at the top of the dry ice spraying chamber is sleeved at the cylindrical section, and a conical inner channel of the flow guide seat is sleeved at the conical section.

5. A dry ice sublimation cooling spray chamber apparatus as claimed in claim 4, wherein: the bottom of the dry ice spraying chamber is provided with a convex edge protruding outwards horizontally, and the bottom of the heat-insulating shell is connected with the convex edge in a sealing mode.

6. A dry ice sublimation cooling spray chamber apparatus as claimed in claim 4, wherein: the bottom and the top of the dry ice spraying chamber are of a rounded corner structure.

7. A dry ice sublimation cooling spray chamber apparatus as claimed in claim 4, wherein: and a heat source surface placing opening is reserved at the bottom of the dry ice spraying chamber and is horizontally and tightly combined with the heat source surface.

8. A dry ice sublimation cooling spray chamber apparatus as claimed in claim 4, wherein: the nozzle passage is a cylindrical passage.

9. A dry ice sublimation cooling spray chamber apparatus as claimed in claim 4, wherein: the outlets are symmetrically arranged around the bottom of the heat preservation shell.

Technical Field

The invention relates to the technical field of dry ice phase change spray cooling, in particular to a dry ice sublimation cooling spray chamber device.

Background

With the demands of the fields of computers, communication, military, aerospace, civil markets and the like, electronic technology is rapidly developed. The packaging density of electronic devices is continuously improved, the heat flux density of the electronic devices is continuously increased, electronic products are continuously developed towards the miniaturization direction, the power is higher, and the overall dimension is gradually reduced. These trends in electronic products have made the problem of overheating of electronic devices more and more prominent. Overheating of electronic equipment is one of the main reasons for failure of electronic products, so that the improvement of the performance and the reliability of the electronic products is severely limited, and the service life of the equipment is also shortened. Therefore, the temperature rise in the electronic equipment must be controlled, and it is critical to effectively solve the problem by using good heat dissipation measures, but the conventional cooling device (such as air cooling and water cooling) can meet the requirement of temperature control, but the heat dissipation capability of the conventional cooling device is far from meeting the future development requirement.

In order to design and research an efficient cooling and heat dissipation system and obtain larger cooling capacity, the phase-change cooling technology is in the visual field of scientists. Most of the traditional spray cooling technology adopts liquid working media as refrigerants, the system is complex, and the requirements on application environment and objects are high. The application of dry ice sublimation as a heat exchange mechanism is rarely studied in spray cooling technology. The sublimation temperature of solid carbon dioxide, namely dry ice, is lower than-78.5 ℃, the sublimation latent heat of the solid carbon dioxide is very large at 573kJ/kg, and sublimation is a process of directly converting a large amount of heat absorbed by a solid state into a gaseous state, the gaseous state is easier to process in a complex application system compared with the liquid state, and the dry ice sublimation spray cooling technology has a higher application prospect in the field of thermal control.

However, experiments show that when dry ice spraying cooling is carried out on the surface of a heat source, the heat exchange amount between dry ice sublimation and the environment is large, so that the dry ice spraying cooling efficiency is reduced, and at present, no spraying cavity device for heat preservation and heat exchange efficiency improvement of dry ice spraying cooling exists.

The invention patent of publication number CN110381700A discloses a spraying cavity and steam cavity integrated phase-change cooling device and system, the device includes a cavity, a spraying cavity liquid inlet pipe, a spraying cavity liquid outlet pipe, and a spray orifice plate and an array nozzle which are positioned in the cavity, the cavity includes a spraying cavity and a steam cavity, the spraying cavity is divided into a buffer chamber and a spraying chamber by the spray orifice plate, the spraying cavity liquid inlet pipe is communicated with the buffer chamber, the spraying cavity liquid outlet pipe is communicated with the spraying chamber, the array nozzle is arranged on one side of the spray orifice plate which is positioned in the spraying chamber, the spray orifice plate is provided with a plurality of through holes which are communicated with the buffer chamber and the array nozzle, the steam cavity is arranged opposite to the array nozzle, and the steam cavity is sealed with a phase-change working medium. The steam chamber is connected with spraying cavity integral type, and the steam chamber can in time evenly expand the spraying surface with the high heat flux density heat that electronic component produced, and the inside working medium of spraying cavity sprays at the spraying surface through the array nozzle at a high speed, takes away a large amount of heats through convection current and phase transition heat transfer, reaches the cooling effect to electronic component.

The patent of the invention with the publication number of CN105960145B discloses a closed spray cooling device with an adjustable inclination angle, wherein a spray chamber is a sealable cavity made of transparent organic glass and a stainless steel plate, an inclined spray support, a simulation heat source and a condensing coil pipe are arranged in the spray chamber, the inclined spray support is fixedly connected to the stainless steel plate at the bottom of the cavity, a nozzle is connected to the upper surface of the inclined spray support, the spray chamber is respectively connected with a cooling water inlet pipe, a cooling water return pipe, a condensed water inlet pipe, a condensed water return pipe, a vacuum pump interface and a pressure sensor, and the cooling water inlet pipe is connected with the nozzle through a stainless steel braided hose; the simulated heat source is positioned under the nozzle and is respectively connected with the electric control cabinet and the data acquisition device. Under the vacuum environment that the vacuum pump provided, utilize the inclined jet to eliminate heat source surface center stagnation area, combine the micro-structure surface, can show improvement spray cooling heat-sinking capability, reduce system's encapsulation volume, provide visual experimental apparatus for the comprehensive research influences spray cooling heat transfer parameter.

However, the technical scheme is not applicable to a dry ice spray cooling technology, and the heat preservation effect of a dry ice spray cooling system cannot be achieved.

Disclosure of Invention

The invention aims to provide a dry ice sublimation cooling spraying chamber device.

In order to solve the technical problems, the invention adopts the following technical scheme:

a dry ice sublimation cooling spraying chamber device is formed by combining a dry ice spraying chamber and a heat-insulating shell in an internally-externally nested manner, wherein a heat source is positioned at the bottom of the dry ice spraying chamber;

the heat-insulating shell is provided with an inlet, the heat-insulating shell is provided with a nozzle pipe extending downwards at the inlet, a nozzle channel is formed at the inner diameter of the nozzle pipe, and the outer diameter of the nozzle pipe forms a conical outer profile with a small upper part and a large lower part; the dry ice nozzle enters the dry ice spraying chamber through the inlet and the nozzle channel, and the dry ice nozzle is wrapped by the nozzle channel;

the top of the dry ice spraying chamber is provided with a through hole, the dry ice spraying chamber is sleeved on the nozzle pipe through the through hole, a backflow gap is reserved between the through hole and the nozzle pipe, and a flow dividing structure is arranged at the backflow gap to control the gas backflow amount;

gaps are reserved between the top and the side of the dry ice spraying chamber and the heat preservation shell, and an outlet annular channel is formed in the gaps; the bottom of the heat-insulating shell is provided with an outlet communicated with the outlet annular channel;

the top of the dry ice spraying chamber is provided with a downward flow guide seat, the flow guide seat is provided with a conical inner channel, the flow guide seat is sleeved outside the nozzle pipe through the conical inner channel, and the conical inner channel and the similar conical outer contour of the nozzle pipe form a gradually-expanded type backflow channel; a gap is also reserved between the flow guide seat and the top of the dry ice spraying chamber, and the gap is communicated with the dry ice spraying chamber to form a backflow annular channel.

The shunting structure comprises two semicircular annular shunting plates, the two semicircular annular shunting plates are located on the upper side of the top of the dry ice spraying chamber and located on two sides of the nozzle pipe respectively, and the two semicircular annular shunting plates are close to or far away from each other to reduce or enlarge the backflow gap.

The two semicircular annular splitter plates are respectively connected with a grab handle extending upwards, a horizontal sliding groove is arranged at the position, corresponding to the grab handle, on the heat insulation shell, and the grab handles respectively penetrate through the corresponding horizontal sliding grooves.

The conical outer contour of the nozzle pipe is composed of a cylindrical section at the upper part and a conical section at the lower part, a through hole at the top of the dry ice spraying chamber is sleeved at the cylindrical section, and a conical inner channel of the flow guide seat is sleeved at the conical section.

The bottom of the dry ice spraying chamber is provided with a convex edge protruding outwards horizontally, and the bottom of the heat-insulating shell is connected with the convex edge in a sealing mode.

The bottom and the top of the dry ice spraying chamber are of a rounded corner structure.

And a heat source surface placing opening is reserved at the bottom of the dry ice spraying chamber and is horizontally and tightly combined with the heat source surface.

The nozzle passage is a cylindrical passage.

The outlets are symmetrically arranged around the bottom of the heat preservation shell.

The invention has the beneficial effects that:

adopt above-mentioned technical scheme, the dry ice nozzle inserts dry ice spraying chamber, nozzle channel outside is equipped with gradually-expanding type backward flow passageway, constitute carbon dioxide gas backward flow passageway, nozzle spun carbon dioxide gas sprays and strikes to dry ice spraying chamber bottom heat source surface, the backward flow annular channel that is certain fillet through the bottom flows to the device top, the reposition of redundant personnel structure that spraying chamber top set up shunts gas, partial carbon dioxide cooling gas gets into gradually-expanding type backward flow passageway, form carbon dioxide cooling gas curtain protective layer, play the dry ice guard action to nozzle department, another partial carbon dioxide cooling gas flows into the outside export annular channel of dry ice spraying chamber, constitute spraying chamber outside cooling gas protective layer, four export discharges the external world through heat preservation shell bottom at last.

The invention can improve the heat exchange efficiency of dry ice sublimation spray cooling, on one hand, a cooling gas protective layer outside the spray cavity is formed by the distance between the spray cavity and the shell of the heat preservation device, and the cooling gas protective layer outside the spray cavity plays a role in heat preservation for the inner spray cavity, on the other hand, partial gas is sprayed to the surface of a heat source again by the two semicircular flow distribution plates, and a carbon dioxide cooling gas curtain wall is formed at the outlet of the backflow gradually-expanding flow passage, thereby reducing the heat exchange between the dry ice at the nozzle and the environment, improving the cooling efficiency of dry ice spray and saving the using amount of the dry ice.

Drawings

FIG. 1 is a schematic cross-sectional view of a dry ice spray chamber in an embodiment of the invention;

FIG. 2 is a schematic sectional structure view of a heat-insulating housing according to an embodiment of the present invention;

FIG. 3 is a schematic sectional view of a dry ice spraying chamber and a heat-insulating shell after being combined in an embodiment of the invention.

Reference numbers for the components in the figures: 1-heat preservation shell; 2-dry ice spraying chamber; 101-nozzle channel; 102, a chute; 103-an outlet; 201-semi-circular splitter plate; 202-a tapered inner channel; 203-a flow guide seat; 204-heat source surface placement port; 205-a handle; 301-divergent return channel; 302-return annular channel; 303 — outlet annular channel.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1 to fig. 3, the dry ice sublimation cooling spraying chamber device of the embodiment is formed by internally and externally nesting and combining a dry ice spraying chamber 2 and a heat preservation shell 1, wherein a heat source surface placing opening 204 is left at the bottom of the dry ice spraying chamber 2 and is horizontally and tightly combined with a square heat source surface.

The heat-insulating shell 1 is provided with a circular inlet, a nozzle pipe 101 extending downwards is arranged at the circular inlet of the heat-insulating shell, a cylindrical nozzle channel is formed at the inner diameter of the nozzle pipe 101, and the outer diameter of the nozzle pipe forms a conical outer profile with a small upper part and a large lower part; the dry ice nozzle enters the dry ice spraying chamber through the round inlet and the nozzle channel, the diameter of the nozzle channel is slightly larger than that of the dry ice nozzle, the dry ice nozzle is wrapped by the nozzle channel, the dry ice is sprayed through the dry ice nozzle to impact the simulated heat surface, and cooling gas diffuses around the simulated heat source surface.

The top of the dry ice spraying chamber 2 is provided with a through hole, the dry ice spraying chamber 2 is sleeved on the nozzle pipe 101 through the through hole, a backflow gap is reserved between the through hole and the nozzle pipe, and a flow dividing structure is arranged at the backflow gap to control the gas backflow amount.

Gaps are reserved between the top and the side of the dry ice spraying chamber 2 and the heat preservation shell 1, and an outlet annular channel 303 is formed in the gaps; the bottom of the heat preservation shell 1 is provided with an outlet 103 communicated with the outlet annular channel 303, and the outlets 103 are symmetrically arranged around the bottom of the heat preservation shell 1.

A downward flow guide seat 203 is arranged at the top of the dry ice spraying chamber 2, a conical inner channel is arranged on the flow guide seat 203, the flow guide seat is sleeved outside the nozzle pipe 101 through the conical inner channel 202, and the conical inner channel 202 and the conical outer contour of the nozzle pipe 101 form a gradually-expanding type backflow channel 301; a gap is also reserved between the flow guide seat 203 and the top of the dry ice spraying chamber, and the gap is communicated with the dry ice spraying chamber to form a backflow annular channel 302.

In this embodiment, the reposition of redundant personnel structure comprises two semicircle annular flow distribution plates 201, and two semicircle annular flow distribution plates 201 are located dry ice spraying cavity top upside to be located nozzle pipe 101 both sides respectively, two semicircle annular flow distribution plates 201 draw close each other or keep away from, diminish or grow the backward flow clearance. The two semi-circular splitter plates 203 are fully close together on the nozzle tube 101 and the reflowable gap is fully closed.

The two semicircular annular splitter plates 201 are respectively connected with a grab handle 205 which extends upwards, a horizontal sliding groove 102 is arranged at the position, corresponding to the grab handle 202, of the heat preservation shell 1, and the grab handle 202 penetrates through the corresponding horizontal sliding groove 102. The horizontal movement handle 205 can control the discharge amount and the recovery amount of the dry ice cooling gas, and the horizontal chute 10 is used for limiting the horizontal movement space of the handle.

In this embodiment, the conical-like outer contour of the nozzle pipe 101 is composed of a cylindrical section at the upper part and a conical section at the lower part, the top through hole of the dry ice spraying chamber 2 is sleeved at the cylindrical section, and the conical inner channel of the flow guide seat 202 is sleeved at the conical section.

In this embodiment, the bottom of the dry ice spraying chamber 2 is provided with a convex edge protruding outwards and horizontally, and the bottom of the heat preservation shell 1 is connected with the convex edge in a sealing manner.

In this embodiment, the bottom and the top of the dry ice spraying chamber 2 are both in a certain rounded structure, so that the flow resistance of the cooling gas is reduced.

The working principle of the invention is as follows:

the dry ice nozzle enters the dry ice spraying chamber 2 through the round inlet and the nozzle channel, the dry ice at the nozzle impacts the surface of a heat source in a spraying mode, cooling gas is rapidly diffused to the top of the dry ice spraying chamber along the surface of the heat source along the backflow annular channel 302, and the bottom and the top of the backflow annular channel 302 are provided with fillets so as to reduce the flow resistance of the cooling gas and reduce the influence of a flow channel on the flow rate of the cooling gas.

When the dry ice cooling gas flows to the top along the backflow annular channel 302, a semicircular annular splitter plate 201 is arranged at the top of the dry ice spraying chamber, the discharging amount and the recycling amount of the dry ice cooling gas can be controlled by horizontally moving a grab handle 205, and a horizontal sliding groove 102 is arranged at the position of the grab handle 205 so as to limit the horizontal moving space of the grab handle.

When the cooling gas flows to the top of the dry ice spraying chamber, part of the cooling gas is distributed to the divergent backflow channel 301, the nozzle is wrapped by the cooling gas, a conical cooling gas curtain wall is formed at the outlet of the nozzle, the heat exchange quantity of the cooling gas and air at the outlet of the nozzle is reduced, and finally the cooling gas is sprayed again to impact the surface of a heat source, so that the utilization rate of the dry ice cooling gas is improved.

The remainder of the cooling gas flows through outlet annular channel 303 to outlet 103 and is ultimately exhausted to the environment. It should be emphasized that when the dry ice cooling gas flows through the outlet annular channel 303, a second annular cooling gas curtain wall is formed to insulate the dry ice spraying chamber, reduce heat exchange with the surrounding environment, and improve sublimation cooling capacity of the dry ice.

The working process of the invention is as follows:

after the dry ice nozzle enters the spray chamber through the nozzle channel 101, the dry ice nozzle is enclosed by the nozzle channel 101. The dry ice is sprayed from the nozzle and collides with the surface of a heat source, cooling gas moves towards the top of the dry ice spraying chamber 1 along the backflow annular channel 302, two semicircular annular flow distribution plates 201 are arranged at the top of the spraying chamber, the discharge amount and the recycling amount of the cooling gas are controlled by adjusting the grab handle, part of the gas flows out of an outlet through the backflow annular channel 302, a conical carbon dioxide cooling gas curtain wall protection layer is formed at the outlet of the nozzle, the dry ice nozzle is insulated, and the gas is sprayed to the surface of the heat source again to cool the dry ice nozzle, so that the purpose of recycling the dry ice cooling gas is achieved. And the rest of the cooling gas enters an outlet annular channel 303 outside the dry ice spraying chamber 2 to form a cooling gas protective layer outside the spraying chamber again, so that the heat exchange quantity between the dry ice cooling gas in the spraying chamber and the environment is reduced again, and the gas is finally discharged through an outlet of the heat-insulating shell 1.

The invention can improve the heat exchange efficiency of dry ice sublimation spray cooling, on one hand, a cooling gas protective layer outside the spray cavity is formed by the distance between the spray cavity and the shell of the heat preservation device, and the cooling gas protective layer outside the spray cavity plays a role in heat preservation for the inner spray cavity, on the other hand, partial gas is sprayed to the surface of a heat source again by the two semicircular flow distribution plates, and a carbon dioxide cooling gas curtain wall is formed at the outlet of the backflow gradually-expanding flow passage, thereby reducing the heat exchange between the dry ice at the nozzle and the environment, improving the cooling efficiency of dry ice spray and saving the using amount of the dry ice.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.

In the description of the present invention, it is to be understood that the terms "left", "right", "front", "rear", "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention.