High pressure visual loop heat pipe condenser

Abstract

The utility model relates to a kind of high-pressure visual loop heat pipe condensers in loop heat pipe heat dissipation technical field, including bottom plate, glass plate, polytetrafluoroethylene gasket, stainless steel gasket, elastic pad, bolt, bolt hole sealing ring, outer ring sealing ring, flow passage sealing ring, import pipe and export pipe.The utility model is in bottom plate and is opened out serpentine flow channel groove and the sealing groove of surrounding flow channel, using the thicker glass plate of equal size with condenser, utilize bolt fixed glass plate and bottom plate, and using sealing ring sealing flow channel around prevents working medium leakage.The condenser of the utility model has high-pressure characteristic and vapor-liquid two-phase full domain visual monitoring capability, while maintaining high-efficiency heat dissipation and structural stability, and has important value to improve the design precision of loop heat pipe, fault diagnosis capability and dynamic control level.

Description

Technical Field

[0001] This utility model relates to the field of loop heat pipe heat dissipation technology, and in particular to a high-pressure-bearing, visualized loop heat pipe condenser. Background Technology

[0002] With the rapid iteration of integrated circuit manufacturing processes and the continuous increase in chip power density, heat dissipation has become a key bottleneck restricting its performance and reliability. Traditional single-phase heat dissipation technologies such as air cooling and liquid cooling are limited by heat capacity and heat transfer efficiency, making it difficult to meet the heat dissipation requirements of high-power chips. Against this backdrop, loop heat pipes, as a highly efficient passive two-phase heat transfer device, have gradually become a research hotspot in high heat flux density scenarios such as data center servers, 5G communication equipment, and aerospace electronic systems. As one of the core components of the loop heat pipe, the condenser plays a crucial role in condensing the vapor working fluid into a liquid and releasing heat, and its performance directly affects the system's heat dissipation efficiency and temperature uniformity.

[0003] However, traditional loop heat pipe condensers typically employ a fully enclosed metal structure design, generally lacking the ability to monitor the two-phase flow and condensation process in real time. This results in the inability to directly observe key phenomena such as the condensation phase change process of the internal working fluid, the liquid film distribution, and the accumulation of non-condensable gases. This limitation forces researchers to rely heavily on numerical simulations and indirect experimental data when optimizing condenser structures (such as the geometry of the condensation chamber and the design of the working fluid flow path), leading to long design cycles and low tolerance for parameter adjustments. Furthermore, in actual operation, if problems such as uneven liquid film distribution, non-condensable gas retention, or obstructed condensate flow occur within the condenser, the enclosed structure cannot provide real-time visual feedback, leading to difficulties in fault location, decreased system heat transfer performance, or even loop heat pipe failure, thus hindering research on loop heat pipe systems. Although some studies have attempted to use transparent materials in parts of the condenser shell to observe the behavior of the internal working fluid, the stringent requirements for material strength, sealing, and durability under high-temperature and high-pressure conditions mean that existing solutions often face problems such as easily deformable observation windows, sealing failure, or insufficient corrosion resistance, making it difficult to simultaneously meet the needs of full-process visualization and long-term operational reliability.

[0004] Therefore, it is necessary to develop a loop heat pipe condenser that combines high pressure resistance with full-range visual monitoring capability of the vapor-liquid two-phase system, while maintaining efficient heat dissipation and structural stability. This is of great value for improving the design accuracy, fault diagnosis capability, and dynamic control level of loop heat pipes. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model proposes a high-pressure-bearing, visual loop heat pipe condenser. This condenser employs a flat-plate design, with serpentine flow channel grooves and sealing grooves surrounding the flow channels cut into the plate. It uses thick quartz glass of the same size as the condenser, and bolts are used to secure the quartz glass and condenser. A sealing ring is used to seal around the flow channels to prevent refrigerant leakage. This meets the requirements for high pressure resistance and corrosion resistance in visual condensers. The technical solution of this utility model is implemented as follows:

[0006] A high-pressure, visual loop heat pipe condenser includes a base plate, a glass plate, a polytetrafluoroethylene gasket, a stainless steel gasket, a spring washer, bolts, bolt hole sealing rings, an outer ring sealing ring, a flow channel sealing ring, an inlet pipe, and an outlet pipe.

[0007] The base plate includes a base plate body, an outer ring sealing groove, a bolt hole sealing groove, a flow channel sealing groove, a flow channel, bolt holes, a condenser mounting hole, a flow channel inlet, and a flow channel outlet;

[0008] The flow channel and the bolt hole are formed on the base plate body, the bolt hole sealing ring groove is formed on the outer periphery of the bolt hole, the flow channel sealing ring groove is formed on the outer periphery of the flow channel, and the outer ring sealing ring groove is formed on the base plate body and surrounds the flow channel and the bolt hole;

[0009] The spring washer, the stainless steel gasket, and the polytetrafluoroethylene gasket are sequentially fitted onto the bolt. The glass plate is placed on the base plate and fixed by the bolt and the bolt hole. The outer ring sealing ring fits into the outer ring sealing ring groove and is located between the base plate and the glass plate. The flow channel sealing ring fits into the flow channel and is located between the base plate and the glass plate. The inlet pipe is connected to the flow channel inlet, and the outlet pipe is connected to the flow channel outlet.

[0010] Preferably, the base plate is made of aluminum alloy, the glass plate is made of quartz, and the inlet pipe and the outlet pipe are made of stainless steel.

[0011] Preferably, the dimensions of the base plate body are: length 180mm-250mm, width 180mm-250mm, and height 5mm-10mm.

[0012] Preferably, the flow channel is a serpentine flow channel with a width of 2.5mm to 3mm, a depth of 2mm to 3mm, and a total length of 1000m to 1500m.

[0013] Preferably, the bolt holes are evenly distributed on the base plate body, and the distance between adjacent bolt holes is 35mm to 50mm in the length direction of the flow channel and 15mm to 30mm in the width direction of the flow channel.

[0014] Preferably, the inner diameter of the bolt hole sealing ring groove is 4mm to 6mm, the outer diameter is 8mm to 10mm, and the depth is 1.0mm to 1.5mm.

[0015] Preferably, the width of the flow channel sealing ring groove is 1.5-3mm, the depth is 1.0mm-1.5mm, and the total length is 1300m-1700m.

[0016] Preferably, the outer ring sealing groove has a width of 1.5 to 3 mm, a depth of 1.0 mm to 1.5 mm, and a total length of 650 m to 800 m.

[0017] Preferably, the glass plate includes a glass plate body and bolt through holes;

[0018] The bolt through hole is formed on the glass plate and corresponds to the position of the bolt hole.

[0019] The advantages of this utility model are as follows:

[0020] 1. Compared with other visual condensers, this utility model, through special structural design, appropriately increases the thickness of quartz glass and adjusts the structure and pore design of quartz glass to meet the requirements of high-pressure operation of the system working fluid;

[0021] 2. For the highly corrosive working fluid ammonia, this utility model selects a sealing ring, base plate and visualization window that do not react with the working fluid at all, so as to meet the corrosion resistance requirements of the system.

[0022] 3. Regarding the system's sealing performance, this invention employs a multi-layer sealing method by adjusting the structural design of the sealing channel and selecting the sealing method to ensure a comprehensive sealing effect. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0025] Figure 1This is a structural schematic diagram of an embodiment of a high-pressure, visualized loop heat pipe condenser. It should be noted that, in order to demonstrate the visualization feature and to be realistic, Figure 1 The glass plate inside is transparent, so the internal flow channels and other structures of the condenser can be seen through the glass plate;

[0026] Figure 2 for Figure 1 The illustrated embodiment shows an axial view of the base plate;

[0027] Figure 3 for Figure 2 The diagram shows the detailed structure of the base plate, in which... Figure 3 The image above is a top view. Figure 3 The middle image is a sectional view of plane AA. Figure 3 The image below is an enlarged view of a portion of the structure in the cross-sectional view of section A-1. The enlarged structure is as follows: Figure 3 The part circled in the middle of the image;

[0028] Figure 4 for Figure 1 The illustrated embodiment shows a structural diagram of the glass plate. In the above figures, the reference numerals indicate: 1, base plate;

[0029] 1-1, Main body of the base plate;

[0030] 1-2, Outer ring sealing groove;

[0031] 1-3, Bolt hole sealing ring groove;

[0032] 1-4, Flow channel sealing ring groove;

[0033] 1-5, flow channels;

[0034] 1-6, Bolt holes;

[0035] 1-7, Condenser mounting holes;

[0036] 1-8, Flow channel inlet;

[0037] 1-9, Flow channel outlet;

[0038] 2. Glass plate;

[0039] 2-1, Glass panel body;

[0040] 2-2, Through-hole for bolts;

[0041] 3. Polytetrafluoroethylene gasket;

[0042] 4. Stainless steel gaskets;

[0043] 5. Spring pad;

[0044] 6. Bolts;

[0045] 7. Bolt hole sealing ring;

[0046] 8. Outer ring seal;

[0047] 9. Flow channel sealing ring;

[0048] 10. Imported pipe;

[0049] 11. Export pipe. Detailed Implementation

[0050] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0051] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having” and any variations thereof in the specification, claims and foregoing description of the invention are intended to cover non-exclusive inclusion.

[0052] In the description of the specific embodiments of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0053] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0054] In the description of this utility model embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this utility model, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0055] The embodiments of this utility model will be described in more detail below through examples. It should be noted that the embodiments of this utility model are not limited to these examples.

[0056] In one specific embodiment, such as Figure 1 As shown, a high-pressure, visual loop heat pipe condenser includes a base plate 1, a glass plate 2, a polytetrafluoroethylene gasket 3, a stainless steel gasket 4, a spring washer 5, a bolt 6, a bolt hole sealing ring 7, an outer ring sealing ring 8, a flow channel sealing ring 9, an inlet pipe 10, and an outlet pipe 11.

[0057] like Figure 2 and Figure 3 As shown, the base plate 1 includes a base plate body 1-1, an outer ring sealing groove 1-2, a bolt hole sealing groove 1-3, a flow channel sealing groove 1-4, a flow channel 1-5, a bolt hole 1-6, a condenser mounting hole 1-7, a flow channel inlet 1-8, and a flow channel outlet 1-9.

[0058] In this embodiment, the base plate body 1-1 is made of aluminum alloy and has dimensions of 200mm*200mm*7mm.

[0059] The base plate body 1-1 is machined with flow channels 1-5 and several bolt holes 1-6.

[0060] The width of flow channels 1-5 is 3mm, the depth is 2.5mm, and the total length is 1200mm.

[0061] Bolt holes 1-6 are M3 through holes. The hole spacing in the length direction of flow channel 1-5 is 41mm, and the hole spacing in the width direction of flow channel 1-5 is 20mm.

[0062] Machine a U-shaped bolt hole sealing groove 1-3 with an inner diameter of 4mm, an outer diameter of 8mm, and a depth of 1.3mm around each bolt hole 1-6.

[0063] A U-shaped flow channel sealing groove 1-4, 2mm wide and 1.3mm deep, with a total length of 1442mm, is machined around the flow channel 1-5 at a distance of 2.5mm from the center. A U-shaped outer ring sealing groove 1-2, 2mm wide and 1.3mm deep, with a total length of 715mm, is machined on the outside of the bolt hole 1-6 and the flow channel 1-5.

[0064] like Figure 4 As shown, the glass plate 2 in this embodiment includes a glass plate body 2-1 and a bolt through hole 2-2. The glass body is made of quartz glass and has dimensions of 200mm*200mm*16mm. The diameter of the bolt through hole 2-2 is 3.5mm.

[0065] In this embodiment, the polytetrafluoroethylene gasket 3 has an inner diameter of 3.5 mm, an outer diameter of 12 mm, and a thickness of 2 mm.

[0066] In this embodiment, the stainless steel gasket 4 has an inner diameter of 4mm, an outer diameter of 12mm, and a thickness of 2mm.

[0067] In this embodiment, the inner diameter of the spring pad 5 is 3.3 mm, the outer diameter is 5 mm, and the thickness is 1 mm.

[0068] In this embodiment, bolt 6 is made of stainless steel with an M3*25mm specification.

[0069] In this embodiment, the bolt hole sealing ring 7, the outer ring sealing ring 8, and the flow channel sealing ring 9 are all O-rings with a wire diameter of 2mm and made of perfluoroether, with outer diameters of 8mm, 220mm, and 780mm, respectively.

[0070] Bolt hole sealing ring 7, outer ring sealing ring 8 and flow channel sealing ring 9 are respectively fitted into bolt hole sealing ring groove 1-3, outer ring sealing ring groove 1-2 and flow channel sealing ring groove 1-4, and are pressed flat by glass plate 2 to make an interference fit with the sealing groove to complete the sealing.

[0071] In this embodiment, the inlet pipe 10 and the outlet pipe 11 are made of stainless steel. After being inserted into the flow channel inlet 1-8 and the flow channel outlet 1-9, the inlet pipe 10 and the outlet pipe 11 are connected by brazing and used as lead-out pipes for the assembly and connection of the loop heat pipe system.

[0072] In this embodiment, during installation, the bolt 6 passes through the spring washer 5, the stainless steel washer 4, the polytetrafluoroethylene washer 3 and the bolt through hole 2-2 in sequence, and is threadedly fixed to the bolt hole 1-6. The polytetrafluoroethylene washer 3 is close to the glass body 2-1 to prevent the glass from being scratched. At the same time, the deformation caused by pressing the polytetrafluoroethylene washer 3 ensures that the base plate 1 and the glass plate 2 are completely attached.

[0073] In use, the inlet pipe 10 is welded to the vapor line of the loop heat pipe, and the outlet pipe 11 is welded to the liquid line of the loop heat pipe. The system is filled with ammonia as the working fluid. At a normal operating temperature of 25°C, the pressure of the ammonia working fluid is 1 MPa, and at 60°C, the pressure is 2.6 MPa. The condenser in Example 1 can meet the pressure requirement of 3 MPa, thus allowing the ammonia working fluid to operate at temperatures up to 60°C.

[0074] In the loop heat pipe system, the evaporator is heated, causing the internal working fluid to undergo a phase change and vaporize. The vapor flows into the flow channel 1-5 along the inlet pipe 10. The bottom plate 1 increases the heat exchange area, and the vapor undergoes a phase change in the condenser, forming a two-phase region. The condenser is fixed through the condenser mounting holes 1-7 for observation. The vapor-liquid distribution and flow inside the flow channel can be observed through the glass plate 2.

[0075] It should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-pressure, visually-oriented loop heat pipe condenser, characterized in that, Includes base plate, glass plate, PTFE gasket, stainless steel gasket, spring washer, bolt, bolt hole seal ring, outer ring seal ring, flow channel seal ring, inlet pipe and outlet pipe; The base plate includes a base plate body, an outer ring sealing groove, a bolt hole sealing groove, a flow channel sealing groove, a flow channel, bolt holes, a condenser mounting hole, a flow channel inlet, and a flow channel outlet; The flow channel and the bolt hole are formed on the base plate body, the bolt hole sealing ring groove is formed on the outer periphery of the bolt hole, the flow channel sealing ring groove is formed on the outer periphery of the flow channel, and the outer ring sealing ring groove is formed on the base plate body and surrounds the flow channel and the bolt hole; The spring washer, the stainless steel gasket, and the polytetrafluoroethylene gasket are sequentially fitted onto the bolt. The glass plate is placed on the base plate and fixed by the bolt and the bolt hole. The outer ring sealing ring fits into the outer ring sealing ring groove and is located between the base plate and the glass plate. The flow channel sealing ring fits into the flow channel and is located between the base plate and the glass plate. The inlet pipe is connected to the flow channel inlet, and the outlet pipe is connected to the flow channel outlet.

2. The high-pressure, visible loop heat pipe condenser according to claim 1, characterized in that, The base plate is made of aluminum alloy, the glass plate is made of quartz, and the inlet pipe and the outlet pipe are made of stainless steel.

3. The high-pressure, visible loop heat pipe condenser according to claim 1, characterized in that, The dimensions of the base plate are: length 180mm-250mm, width 180mm-250mm, height 5mm-10mm.

4. The high-pressure, visible loop heat pipe condenser according to claim 1, characterized in that, The flow channel is a serpentine flow channel with a width of 2.5mm to 3mm, a depth of 2mm to 3mm, and a total length of 1000m to 1500m.

5. The high-pressure, visible loop heat pipe condenser according to claim 1, characterized in that, The bolt holes are evenly distributed on the base plate body. In the length direction of the flow channel, the distance between adjacent bolt holes is 35mm to 50mm, and in the width direction of the flow channel, the distance between adjacent bolt holes is 15mm to 30mm.

6. The high-pressure, visible loop heat pipe condenser according to claim 1, characterized in that, The inner diameter of the bolt hole sealing ring groove is 4mm to 6mm, the outer diameter is 8mm to 10mm, and the depth is 1.0mm to 1.5mm.

7. The high-pressure, visible loop heat pipe condenser according to claim 4, characterized in that, The width of the flow channel sealing ring groove is 1.5-3mm, the depth is 1.0mm-1.5mm, and the total length is 1300m-1700m.

8. The high-pressure, visible loop heat pipe condenser according to claim 1, characterized in that, The outer ring sealing groove has a width of 1.5-3mm, a depth of 1.0mm-1.5mm, and a total length of 650m-800m.

9. The high-pressure, visible loop heat pipe condenser according to claim 1, characterized in that, The glass plate includes a glass plate body and bolt through holes; The bolt through hole is formed on the glass plate and corresponds to the position of the bolt hole.

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