A loop heat pipe evaporator device and a loop heat pipe system

Abstract

The invention discloses a loop heat pipe evaporator device and a loop heat pipe system, belonging to the technical field of loop heat pipes, comprising an evaporator and a liquid reservoir, the evaporator having a heat-conducting storage area and a first connecting area, the storage area being provided with a first through hole, a capillary core being fixed to the first through hole and being in contact with the inner wall of the first through hole; an exhaust pipe connected to the first through hole is provided on the outer periphery of the first connecting area; one end of the first through hole is connected to the liquid reservoir, and a delivery pipe connected to the first through hole is provided on the liquid reservoir; a first circumferential window is provided on the outer peripheral surface of the storage area, a first axial window is provided on the axial end surface of the first connecting area, a first image transmission channel is provided between the first circumferential window and the outer peripheral surface of the capillary core, a second image transmission channel is provided between the first axial window and the axial end surface of the capillary core, and the heat and mass transfer phenomena on the surface of the capillary core are observed from multiple angles from the circumferential direction and the axial direction through the first image transmission channel and the second image transmission channel to improve the comprehensiveness of the observation.

Description

Technical Field

[0001] The present invention relates to the technical field of loop heat pipes, and in particular to a loop heat pipe evaporator device and system. Background Art

[0002] The loop heat pipe is an efficient two-phase heat transfer device with the advantages of long transmission distance, reversible gravity heat transfer, high heat transfer power, and flexible layout. It is widely used in the fields of spacecraft thermal control and electronic component heat dissipation. The loop heat pipe (LHP) is generally composed of an evaporator, a condenser, a liquid reservoir, and steam and liquid pipelines. When working, a heat load is applied to the evaporator, and the working fluid evaporates on the outer surface of the evaporator capillary core. The generated steam flows out of the steam channel into the steam pipeline, and then enters the condenser to condense into liquid and supercool. The reflux liquid enters the liquid main channel through the liquid pipeline to replenish the evaporator capillary core, and the cycle is repeated. The circulation of the working fluid is driven by the capillary pressure generated by the evaporator capillary core, and no external power is required. As the core component of the loop heat pipe, the evaporator plays an important role in organizing evaporation and providing power. Studying the phase change heat transfer and two-phase flow mechanism in the evaporator plays an important role in optimizing the structure of the loop heat pipe and improving the heat transfer performance.

[0003] At present, the visualization research on loop heat pipe evaporator mainly focuses on observing the evaporator in a single direction. However, only observing the boiling, evaporation and two-phase flow phenomena in the steam channel inside the loop heat pipe from a single direction leads to a one-sided and limited understanding of the phase change heat transfer and two-phase flow mechanism inside the loop heat pipe, which is not conducive to the optimization of the loop heat pipe structure and the improvement of the heat transfer performance.

[0004] Therefore, how to design a loop heat pipe evaporator device and a loop heat pipe system so that users can observe the complex heat and mass transfer mechanisms inside the loop heat pipe from multiple angles is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a loop heat pipe evaporator device and a loop heat pipe system in view of the defects and shortcomings in the prior art, so that users can observe the complex heat and mass transfer mechanisms inside the loop heat pipe from multiple angles, so as to provide valuable reference materials for optimizing and improving the loop heat pipe structure.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a loop heat pipe evaporator device, comprising an evaporator and a liquid reservoir, wherein the evaporator has a heat-conducting storage area and a first connection area, a first through hole is provided inside the storage area, a capillary wick is fixed in the first through hole and is closely attached to the inner wall of the first through hole;

[0008] An exhaust pipe for discharging the generated steam is provided on the outer peripheral surface of the first connection area, and the exhaust pipe is connected to the first through hole; an end of the first through hole away from the first connection area is connected to the liquid reservoir, and a delivery pipe for delivering liquid working medium is provided on the liquid reservoir, and the delivery pipe is connected to the first through hole;

[0009] The outer circumferential surface of the storage area is provided with a first circumferential window, and the axial end surface of the first connection area away from the capillary core is provided with a first axial window, through which the two-phase heat and mass transfer phenomenon on the surface of the capillary core can be observed.

[0010] Preferably, the first circumferential window and the first axial window are both transparent observation windows; a second axial through hole is provided inside the first connecting area, and the exhaust duct is connected with the first through hole through the second through hole, and the projection of the first circumferential window on the outer peripheral surface of the capillary core and the projection of the first axial window on the end surface of the capillary core after passing through the second through hole both overlap with the capillary core.

[0011] Preferably, the projection of the first circumferential window on the outer peripheral surface of the capillary core completely covers the outer peripheral surface of the capillary core; the projection of the first axial window on the end surface of the capillary core after passing through the second through hole completely covers the axial end surface of the capillary core.

[0012] Preferably, the liquid reservoir has a liquid storage area connected to the first through hole and a second connecting area for installing the delivery pipeline, the delivery pipeline is located at the outer peripheral surface of the second connecting area, the outer peripheral surface of the liquid storage area is provided with a second circumferential window, the axial end surface of the second connecting area away from the first through hole is provided with a second axial window, a third image transmission channel is provided between the second circumferential window and the outer peripheral surface of the liquid storage area, and a fourth image transmission channel is provided between the second axial window and the axial end surface of the liquid storage area, so as to observe the two-phase heat and mass transfer phenomena occurring in the liquid storage area through the third image transmission channel and the fourth image transmission channel.

[0013] Preferably, the second circumferential window and the second axial window are both transparent observation windows, an axially penetrating third through hole is provided inside the second connecting area, the liquid storage area is connected with the delivery pipeline through the third through hole, and the projection of the second circumferential window on the outer peripheral surface of the liquid storage area and the projection of the second axial window on the end surface of the liquid storage area after passing through the third through hole both overlap with the liquid storage area.

[0014] Preferably, the projection of the second circumferential window on the outer peripheral surface of the liquid storage area completely covers the outer peripheral surface of the liquid storage area; the projection of the second axial window on the end surface of the liquid storage area after passing through the third through hole completely covers the axial end surface of the liquid storage area.

[0015] Preferably, the evaporator comprises an evaporator shell and a first connecting member, the storage area is located in the evaporator shell, the first connecting area is located in the first connecting member, and the axial ends of the evaporator shell are detachably connected to the first connecting member and the liquid reservoir respectively.

[0016] Preferably, the liquid reservoir comprises a liquid reservoir shell and a second connecting member, the liquid storage area is located in the liquid reservoir shell, the second connecting area is located in the second connecting member, and the axial ends of the liquid reservoir shell are detachably connected to the evaporator shell and the second connecting member respectively.

[0017] Preferably, the first axial window is detachably connected to the axial end surface of the first connecting member, and the second axial window is detachably connected to the axial end surface of the second connecting member.

[0018] The present invention also provides a loop heat pipe system, comprising the loop heat pipe evaporator device, a heating device, a camera device, a condenser and a working fluid source, wherein the condenser is respectively connected to the delivery pipe and the exhaust pipe through connecting pipes, the working fluid source is connected to the delivery pipe, the heating device has a heating part, and the heating part is connected to the storage area of ​​the evaporator, and at least one camera device is provided at each viewing window for observation.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] 1. The present invention arranges a first circumferential window on the outer circumferential surface of the storage area, arranges a first axial window on the axial end surface of the first connecting area, arranges a first image transmission channel between the first circumferential window and the outer circumferential surface of the capillary core, arranges a second image transmission channel between the first axial window and the axial end surface of the capillary core, and arranges an exhaust duct on the outer circumferential surface of the first connecting area, so that the user can observe the two-phase heat and mass transfer phenomena occurring on the surface of the capillary core from two different angles, circumferential and axial, to improve the comprehensiveness of the observation, and provide valuable reference materials for the improvement and optimization of the loop heat pipe structure.

[0021] Other technical solutions of the present invention have achieved the following technical effects compared with the prior art:

[0022] 2. The present invention sets a second circumferential window on the outer circumferential surface of the liquid reservoir, sets a second axial window on the axial end surface of the second connecting area, sets a third image transmission channel between the second circumferential window and the outer circumferential surface of the liquid storage area, sets a fourth image transmission channel between the second axial window and the axial end surface of the liquid storage area, and places the delivery pipeline on the outer circumferential surface of the second connecting piece, so that the user can observe the changes in the gas-liquid interface in the liquid reservoir from two different angles, circumferential and axial. Compared with the method of only observing the heat and mass transfer phenomena on the surface of the capillary wick, the present invention can more comprehensively observe the heat and mass transfer phenomena in the loop heat pipe structure, and provide more scientific and comprehensive reference materials for the improvement and enhancement of the loop heat pipe structure.

[0023] 3. Compared with the connection method using welding in the prior art, the present invention can more conveniently replace components such as the evaporator shell, the capillary wick and the liquid reservoir shell through the detachable connection between the evaporator shell and the first connecting piece and the liquid reservoir shell, and the detachable connection between the liquid reservoir shell and the evaporator shell and the second connecting piece, so as to facilitate testing the performance of capillary wicks of different structures under the same test conditions and improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A schematic diagram of the structure of a loop heat pipe evaporator device disclosed in a specific embodiment of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0027] Figure 3 A schematic diagram of the structure of a second flange disclosed in a specific embodiment of the present invention;

[0028] Figure 4 A schematic structural diagram of a first connecting member disclosed in a specific embodiment of the present invention;

[0029] Figure 5 A schematic diagram of the structure of a capillary core disclosed in a specific embodiment of the present invention;

[0030] Figure 6 for Figure 2 Schematic diagram of the cross-sectional structure at DD in the middle.

[0031] Among them, 100, liquid reservoir; 110, seventh flange; 120, second axial window; 130, second connecting member; 131, sixth flange; 132, third flange; 133, third through hole; 140, liquid reservoir housing; 141, second circumferential window; 150, second flange; 151, first connecting hole; 152, second connecting hole;

[0032] 200, evaporator; 210, evaporator housing; 211, first through hole; 212, first circumferential window; 220, capillary wick; 221, vapor channel; 230, first connector; 231, first flange; 232, second through hole; 233, fourth flange; 234, support column; 240, first axial window; 250, fifth flange;

[0033] 300. Exhaust duct; 400. Delivery duct. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figures 1 to 6As shown, the present invention provides a loop heat pipe evaporator device, including an evaporator 200 and a liquid reservoir 100, the evaporator 200 has a storage area and a first connection area capable of conducting heat, a first through hole 211 is provided inside the storage area, a capillary wick 220 is fixed in the first through hole 211 and is tightly fitted with the inner wall of the first through hole 211, so as to conduct heat to the capillary wick 220 through the storage area, so that the liquid working medium inside the capillary wick 220 boils and evaporates, and a two-phase flow phenomenon is generated; an exhaust pipe 300 is provided at the outer peripheral surface of the first connection area, the exhaust pipe 300 is connected with the first through hole 211, and the steam generated by the capillary wick 220 flows from the first through hole 211 to the exhaust pipe 300 for discharge; the end of the first through hole 211 away from the first connection area is connected with the liquid reservoir 100 The liquid reservoir 100 is provided with a delivery pipe 400 for conveying liquid working medium, and the delivery pipe 400 is connected with the first through hole 211. When in use, the liquid working medium in the delivery pipe 400 flows into the capillary core 220 through the first through hole 211 to replenish the capillary core 220; a first circumferential window 212 is provided on the outer peripheral surface of the storage area, and a first axial window 240 is provided on the axial end surface of the first connection area away from the capillary core 220, a first image transmission channel is provided between the first circumferential window 212 and the outer peripheral surface of the capillary core 220, and a second image transmission channel is provided between the first axial window 240 and the axial end surface of the capillary core 220, so as to observe the two-phase heat and mass transfer phenomenon on the surface of the capillary core 220 through the first image transmission channel and the second image transmission channel.

[0037] The mass transfer phenomenon on the surface of the capillary core 220 can be observed with the help of an image acquisition device. For example, a visual sensor can be arranged on the outer circumferential surface and the axial end surface of the capillary core 220, and the collected image is transmitted and projected to the first circumferential window 212 and the first axial window 240 through the visual sensor to observe the complex boiling, evaporation and two-phase flow phenomena occurring on the surface of the capillary core 220. At this time, the first image transmission channel is a visual sensor installed on the outer circumferential surface of the capillary core 220, and the second image transmission channel is a visual sensor installed on the axial end surface of the capillary core 220. Direct observation can also be used. In one embodiment, the first circumferential window 212 and the first axial window 240 are both transparent observation windows, and an axially penetrating second through hole 232 is provided inside the first connecting area, and the exhaust pipe 300 passes through the second through hole. The hole 232 is connected to the first through hole 211, and the projection of the first circumferential window 212 on the outer peripheral surface of the capillary core 220 and the projection of the first axial window 240 on the axial end surface of the capillary core 220 after passing through the second through hole 232 both overlap with the capillary core 220, so that the observer can observe the boiling, evaporation and two-phase flow phenomena on the outer peripheral surface of the capillary core 220 through the first circumferential window 212, and can observe the boiling, evaporation and two-phase flow phenomena occurring on the axial end surface of the capillary core 220 through the first axial window 240, thereby observing the capillary core 220 from multiple angles and improving the comprehensiveness of the observation. At this time, the first image transmission channel is the light transmission channel between the first circumferential window 212 and the outer peripheral surface of the capillary core 220, and the second image transmission channel is the light transmission channel between the first axial window 240 and the axial end surface of the capillary core 220.

[0038] In one embodiment, the projection of the first circumferential window 212 on the outer circumferential surface of the capillary core 220 completely covers the outer circumferential surface of the capillary core 220; the projection of the first axial window 240 on the end face of the capillary core 220 after passing through the second through hole 232 completely covers the axial end face of the capillary core 220, so that the mass transfer phenomenon occurring on the surface of the capillary core 220 can be completely observed through the first circumferential window 212 and the first axial window 240, thereby facilitating a more comprehensive and detailed observation of the boiling, evaporation and two-phase flow phenomena occurring on the surface of the capillary core 220.

[0039] The change of the gas-liquid interface in the liquid reservoir 100 also belongs to the mutually coupled two-phase heat and mass transfer process inside the loop heat pipe system, and is also of reference value for the optimization and improvement of the loop heat pipe structure. For this reason, in one embodiment, the liquid reservoir 100 has a liquid storage area connected to the first through hole 211 and a second connecting area for installing the delivery pipeline 400, and the delivery pipeline 400 is located at the outer peripheral surface of the second connecting area. The outer peripheral surface of the liquid storage area is provided with a second circumferential window 141, and the axial end surface of the second connecting area away from the first through hole 211 is provided with a second axial window 120. A third image transmission channel is provided between the second circumferential window 141 and the outer peripheral surface of the liquid storage area, and a fourth image transmission channel is provided between the second axial window 120 and the axial end surface of the liquid storage area, so as to observe the two-phase heat and mass transfer phenomena occurring in the liquid storage area through the third image transmission channel and the fourth image transmission channel. Similarly, the observation of the two-phase heat and mass transfer phenomena occurring in the liquid storage area can also be carried out with the aid of an image acquisition device or direct observation. In one embodiment, the second circumferential window 141 and the second axial window 120 are both transparent observation windows, and an axially penetrating third through hole 133 is provided inside the second connecting area. The liquid storage area is connected to the delivery pipeline 400 through the third through hole 133. The projection of the second circumferential window 141 on the outer peripheral surface of the liquid storage area and the projection of the second axial window 120 on the end face of the liquid storage area after passing through the third through hole 133 both overlap with the liquid storage area. At this time, the third image transmission channel is the light transmission channel between the second circumferential window 141 and the outer peripheral surface of the liquid storage area, and the fourth image transmission channel is the light transmission channel between the second axial window 120 and the axial end face of the liquid storage area.

[0040] In one embodiment, the projection of the second circumferential window 141 on the outer peripheral surface of the liquid storage area completely covers the outer peripheral surface of the liquid storage area; the projection of the second axial window 120 on the end surface of the liquid storage area after passing through the third through hole 133 completely covers the axial end surface of the liquid storage area, so as to comprehensively and completely observe the dynamic distribution of gas and liquid in the liquid storage device 100.

[0041] The optimization process of the loop heat pipe evaporator often involves the change of the porous material of the capillary wick 220 and the structure of the vapor channel. In order to analyze the heat and mass transfer performance of the capillary wicks 220 with different structures in the same loop heat pipe, in one embodiment, the evaporator 200 includes an evaporator shell 210 and a first connecting member 230. The storage area is located in the evaporator shell 210, and the first connecting area is located in the first connecting member 230. The axial ends of the evaporator shell 210 are detachably connected to the first connecting member 230 and the liquid reservoir 100 respectively. The first through hole 211 penetrates the evaporator shell 210 in the axial direction, and the inner diameter of the first through hole 211 is not less than the outer diameter of the capillary wick 220. The detachable connection method can be mortise and tenon connection, clamping connection, screw connection, etc. In one embodiment, the evaporator shell 210 is connected to the first connecting member 230 and the liquid reservoir 100 by screw connection. In a specific embodiment, a first flange 231 is provided at the end of the first connector 230, and a second flange 150 is provided between the evaporator housing 210 and the liquid reservoir 100. Bolts pass through the first flange 231 and the second flange 150 to clamp and fix the evaporator housing 210 between the two flanges. When the capillary wick 220 needs to be replaced, the bolts can be removed to take out the capillary wick 220. In another embodiment, the evaporator housing 210 is a heat-resistant glass housing, and the entire outer peripheral surface of the evaporator housing 210 constitutes a first circumferential viewing window 212.

[0042] The liquid reservoir 100 includes a liquid reservoir shell 140 and a second connecting member 130. The liquid storage area is located in the liquid reservoir shell 140, and the second connecting area is located in the second connecting member 130. The two axial ends of the liquid reservoir shell 140 are detachably connected to the evaporator shell 210 and the second connecting member 130 respectively. The detachable connection is implemented in the same manner as the evaporator 200. In one embodiment, the liquid reservoir shell 140 is connected to the second connecting member 130 in a screw connection manner. In a specific embodiment, a third flange 132 is provided at the end of the second connecting member 130, and a first connecting hole 151 and a second connecting hole 152 at different radial positions are provided on the second flange 150. The first flange 231 is connected to the second flange 150 through the first connecting hole 151, and the third flange 132 is connected to the second flange 150 through the second connecting hole 152, so as to facilitate the replacement of the liquid reservoir shell 140 and the connecting flanges.

[0043] The first axial window 240 may be a part of the end surface of the first connecting member 230, and the second axial window 120 may be a part of the end surface of the second connecting member 130, but this is not conducive to replacing the first axial window 240 and the second axial window 120. To facilitate replacement, in one embodiment, the first axial window 240 is detachably connected to the axial end surface of the first connecting member 230, and the second axial window 120 is detachably connected to the axial end surface of the second connecting member 130. In a specific embodiment, a fourth flange 233 is further provided at the end of the first connecting member 230, and a fifth flange 250 is provided at the end of the first axial window 240 away from the fourth flange 233, so that the first axial window 240 is clamped and fixed by the fourth flange 233 and the fifth flange 250; a sixth flange 131 is further provided at the end of the second connecting member 130, and a seventh flange 110 is provided at the end of the second axial window 120 away from the sixth flange 131, so that the second axial window 120 is clamped and fixed by the sixth flange 131 and the seventh flange 110. For the convenience of observation, through holes are opened in the middle of the fifth flange 250 and the seventh flange 110, and the inner diameter of the through hole in the fifth flange 250 is not less than the outer diameter of the capillary core 220, and the inner diameter of the through hole in the seventh flange 110 is not less than the inner diameter of the reservoir housing 140. In another embodiment, the second flange 150 is a component independent of the evaporator housing 210 and the liquid reservoir housing 140. The second flange 150 is provided with protrusions at both axial ends, one of which is inserted into the liquid reservoir housing 140, and the other is inserted into the evaporator housing 210. The protrusion inserted into the evaporator housing 210 is in contact with the end surface of the capillary wick 220. The first connector 230 is provided with a support column 234 on one side close to the capillary wick 220. The support column 234 is fixed on the first connector 230 and is in contact with the capillary wick 220. The capillary wick 220 can be prevented from axially moving in the evaporator housing 210 by clamping the protrusion and the support column 234. In order to facilitate the observation of the working medium flow and mass transfer phenomenon in the vapor channel 221 of the capillary wick 220, the support column 234 is arranged alternately with the vapor channel 221 of the capillary wick 220. In another embodiment, the exhaust pipe 300 is detachably connected to the outer circumference of the first connecting member 230 , and the delivery pipe 400 is detachably connected to the outer circumference of the second connecting member 130 .

[0044] The present invention also provides a loop heat pipe system, including a loop heat pipe evaporator device, a heating device, a camera device, a condenser and a working medium source, wherein the condenser is connected to the delivery pipe 400 and the exhaust pipe 300 respectively through connecting pipes, the working medium source is connected to the delivery pipe 400, the heating device has a heating part, the heating part is connected to the storage area of ​​the evaporator 200, and each viewing window for observation is provided with at least one camera device. When in use, the heating device is turned on, so that the heating part heats the storage area of ​​the evaporator 200, thereby heating the capillary wick 220; the working medium source is connected, and the liquid working medium is delivered to the capillary wick 220 through the delivery pipe 400, the position of the camera device is adjusted and the camera device is started, and the boiling, evaporation and two-phase flow phenomena occurring on the surface of the capillary wick 220 are recorded.

[0045] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A loop heat pipe evaporator device, characterized in that: It comprises an evaporator and a liquid reservoir, wherein the evaporator has a heat-conducting storage area and a first connection area, a first through hole is provided inside the storage area, and a capillary core is fixed in the first through hole and closely fits with the inner wall of the first through hole; An exhaust pipe for discharging the generated steam is provided on the outer peripheral surface of the first connection area, and the exhaust pipe is connected to the first through hole; an end of the first through hole away from the first connection area is connected to the liquid reservoir, and a delivery pipe for delivering liquid working medium is provided on the liquid reservoir, and the delivery pipe is connected to the first through hole; A first circumferential viewing window is provided on the outer circumferential surface of the storage area, a first axial viewing window is provided on the axial end surface of the first connection area away from the capillary core, a first image transmission channel is provided between the first circumferential viewing window and the outer circumferential surface of the capillary core, and a second image transmission channel is provided between the first axial viewing window and the axial end surface of the capillary core, so as to observe the two-phase heat and mass transfer phenomenon on the surface of the capillary core through the first image transmission channel and the second image transmission channel; The liquid reservoir comprises a liquid storage area connected to the first through hole and a second connecting area for installing the delivery pipeline, the delivery pipeline is located at the outer peripheral surface of the second connecting area, the outer peripheral surface of the liquid storage area is provided with a second circumferential window, the axial end surface of the second connecting area away from the first through hole is provided with a second axial window, a third image transmission channel is provided between the second circumferential window and the outer peripheral surface of the liquid storage area, and a fourth image transmission channel is provided between the second axial window and the axial end surface of the liquid storage area, so as to observe the two-phase heat and mass transfer phenomena occurring in the liquid storage area through the third image transmission channel and the fourth image transmission channel.

2. The loop heat pipe evaporator device according to claim 1, characterized in that: The first circumferential window and the first axial window are both transparent observation windows; a second through hole that penetrates axially is provided inside the first connecting area, and the exhaust duct is connected with the first through hole through the second through hole; the projection of the first circumferential window on the outer peripheral surface of the capillary core and the projection of the first axial window on the end surface of the capillary core after passing through the second through hole both overlap with the capillary core.

3. The loop heat pipe evaporator device according to claim 2, characterized in that: The projection of the first circumferential window on the outer circumferential surface of the capillary core completely covers the outer circumferential surface of the capillary core; the projection of the first axial window on the end surface of the capillary core after passing through the second through hole completely covers the axial end surface of the capillary core.

4. The loop heat pipe evaporator device according to claim 3, characterized in that: The second circumferential window and the second axial window are both transparent observation windows. An axially penetrating third through hole is provided inside the second connecting area. The liquid storage area is connected to the delivery pipeline through the third through hole. The projection of the second circumferential window on the outer peripheral surface of the liquid storage area and the projection of the second axial window on the end surface of the liquid storage area after passing through the third through hole both overlap with the liquid storage area.

5. The loop heat pipe evaporator device according to claim 4, characterized in that: The projection of the second circumferential window on the outer peripheral surface of the liquid storage area completely covers the outer peripheral surface of the liquid storage area; the projection of the second axial window on the end surface of the liquid storage area after passing through the third through hole completely covers the axial end surface of the liquid storage area.

6. The loop heat pipe evaporator device according to any one of claims 4 to 5, characterized in that: The evaporator comprises an evaporator shell and a first connecting member, the storage area is located in the evaporator shell, the first connecting area is located in the first connecting member, and the axial ends of the evaporator shell are detachably connected to the first connecting member and the liquid reservoir respectively.

7. The loop heat pipe evaporator device according to claim 6, characterized in that: The liquid reservoir comprises a liquid reservoir shell and a second connecting member, the liquid storage area is located in the liquid reservoir shell, the second connecting area is located in the second connecting member, and the axial ends of the liquid reservoir shell are detachably connected to the evaporator shell and the second connecting member respectively.

8. The loop heat pipe evaporator device according to claim 7, characterized in that: The first axial window is detachably connected to the axial end surface of the first connecting member, and the second axial window is detachably connected to the axial end surface of the second connecting member.

9. A loop heat pipe system, characterized in that: It comprises the loop heat pipe evaporator device according to any one of claims 1 to 8, a heating device, a camera device, a condenser and a working fluid source, the condenser is connected to the delivery pipe and the exhaust pipe respectively through connecting pipes, the working fluid source is connected to the delivery pipe, the heating device has a heating part, the heating part is connected to the storage area of ​​the evaporator, and at least one camera device is provided at each viewing window for observation.

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