Dual-evaporator heat pipe heat dissipation device and outdoor unit

Abstract

The utility model belongs to heat dissipation device technical field especially relates to a heat pipe heat dissipation device of double evaporator, include: condenser, including a plurality of parallelly arranged flat -tube, is equipped with fin between adjacent flat -tube, first evaporator, sets up the evaporation cavity of vertical arrangement in its inside, and with heating element heat conduction contact, is used for absorbing heat and makes working medium evaporate, second evaporator, with the first evaporator parallelly connected setting, through double evaporator parallelly connected setting can absorb different heat source heat simultaneously, collocation condenser of parallel flow micro -channel structure with fin and, combine outdoor unit through partition plate and divide air duct cavity with control cavity, first evaporator is pasted control cavity electrical element, second evaporator is used for control cavity heat dissipation and cooperation second fan auxiliary, can pertinence realization electrical element and the efficient heat dissipation of chamber, and the stable operation of equipment is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat dissipation devices, and in particular relates to a heat pipe heat dissipation device with dual evaporators and an outdoor unit. Background Technology

[0002] In the structural design of outdoor units for equipment such as air conditioners and heat pumps, in order to achieve functional zoning and stable operation of the equipment, a partition plate is usually used to divide the interior of the outdoor unit into an air duct cavity and a control cavity. The air duct cavity houses the outdoor unit's condenser and heat dissipation blades, and the condenser's heat exchange is achieved through airflow. The control cavity houses the control box and various electrical components (such as capacitors, relays, drive modules, etc.). These electrical components continuously generate heat during operation, and the control cavity itself, due to its enclosed nature and the overall heat generated by the equipment, also contributes to ambient heat. If the heat cannot be dissipated in time, the temperature of the electrical components may exceed the rated operating range, leading to performance degradation, shortened lifespan, or even the risk of malfunction and shutdown.

[0003] Current heat dissipation solutions for outdoor unit control chambers have many technical limitations: Insufficient adaptability to multiple heat sources: Existing control cavity heat dissipation mostly uses a single heat sink (such as aluminum heat sink or single evaporation section heat pipe), which can only be attached to some high heat-generating electrical components for heat dissipation. It cannot simultaneously cover both the "direct heat generation of electrical components" and the "heat generation of the control cavity environment", resulting in heat accumulation in unattached components or local areas inside the cavity, and obvious heat dissipation blind spots.

[0004] Incomplete heat dissipation coverage in the control cavity: In existing solutions, the control cavity is mostly equipped with local heat dissipation structures only for high heat-generating components, without regulating the overall ambient temperature inside the cavity. When the outdoor ambient temperature is high (such as in high-temperature conditions in summer), the ambient temperature inside the control cavity can easily rise to above 35°C. Even if the heat dissipation of local components meets the standards, the overall high-temperature environment will still have an adverse effect on the operational stability of electrical components. Although some solutions attempt to add auxiliary heat dissipation components, the component layout is unreasonable (such as the evaporator not being adapted to the airflow path), resulting in limited heat dissipation effect.

[0005] Furthermore, in general dual-heat-source or multi-heat-source heat exchange scenarios, existing dual-evaporator structures are mostly designed in series, which cannot achieve synchronous and efficient heat absorption from different heat sources. Moreover, the lack of height difference and reasonable flow path design between evaporators leads to uneven distribution of working fluid among different evaporators, which can easily result in a situation where "one evaporator is overloaded and the other is idle," thus failing to fully utilize the heat absorption advantages of dual evaporators.

[0006] In summary, existing heat exchange devices and outdoor units using them still have significant technical shortcomings in terms of simultaneous heat dissipation from multiple heat sources and comprehensive heat dissipation of the control cavity. There is an urgent need for a dual-evaporator heat pipe cooling device and outdoor unit that can adapt to multiple heat sources and fully cover the heat dissipation requirements of the control cavity. Utility Model Content

[0007] The purpose of this utility model is to address the aforementioned technical problems by providing a heat pipe cooling device with dual evaporators. By connecting the two evaporators in parallel, they can simultaneously absorb heat from different heat sources. Combined with a condenser with fins and a parallel flow microchannel structure, and integrated with the outdoor unit, a partition plate divides the air duct cavity and control cavity. The first evaporator is attached to the electrical components in the control cavity, and the second evaporator is used for heat dissipation in the control cavity, assisted by a second fan. This allows for targeted and efficient heat dissipation of electrical components and the cavity, effectively ensuring stable operation of the equipment.

[0008] In view of this, the present invention provides a heat pipe cooling device with dual evaporators, comprising: The condenser comprises multiple parallel flat tubes with fins between adjacent flat tubes; The first evaporator has a vertically arranged evaporation chamber inside, which is in thermal contact with the heating element to absorb heat and evaporate the working fluid. The second evaporator is connected in parallel with the first evaporator and is used to absorb heat from the ambient heat source and work together with the condenser to complete the circulation and heat exchange of the working fluid. The upper manifold is located above the condenser and is used to guide the working fluid vapor generated by the first evaporator and the second evaporator to the condenser. The lower manifold, located below the condenser, is used to return the working fluid condensate to the first evaporator and the second evaporator.

[0009] Preferably, the first evaporator is arranged in the shape of a vertical plate, with its upper end connected to the upper manifold and its lower end connected to the lower manifold.

[0010] Preferably, the first evaporator is a flat tube heat exchanger or a plate heat exchanger with an internal cavity structure, which includes one or more vertically arranged cavities, and the flat tube of the condenser includes a parallel flow microchannel structure.

[0011] Preferably, the flat tube body of the first evaporator and the flat tube of the condenser have essentially the same cross-sectional length.

[0012] Preferably, the upper end of the second evaporator is connected to the upper manifold through a first connecting pipe, and the connection position between the second evaporator and the upper manifold is located near the connection position between the first evaporator and the upper manifold. The lower end of the second evaporator is connected to the lower manifold through a second connecting pipe, and the connection position between the second evaporator and the lower manifold is located near the connection position between the first evaporator and the lower manifold.

[0013] Preferably, the second evaporator and the first evaporator have a height difference in the vertical direction, and the length of the second evaporator in the vertical direction is greater than the length of the first evaporator in the vertical direction.

[0014] Preferably, the bottom of the upper manifold has multiple ports evenly distributed along its length, the bottom end of the upper manifold is directly connected to the upper end of the first evaporator, and the end of the upper manifold near the second evaporator is connected to the first connecting pipe; the top of the lower manifold has multiple flat pipe connection ports evenly distributed along its length, the top end of the lower manifold is directly connected to the lower end of the first evaporator, and the end of the lower manifold near the second evaporator is connected to the second connecting pipe.

[0015] The second objective of this application is to disclose an outdoor unit, comprising a duct cavity and a control cavity separated by a partition plate, wherein the outdoor unit condenser and blades are located in the duct cavity, the control box is located in the control cavity and mounted on the partition plate, the first evaporator is mounted on the partition plate, electrical components in the control cavity are attached to the surface of the first evaporator, the second evaporator is located in the control cavity to dissipate heat from the control cavity, and the condenser is disposed in the duct cavity.

[0016] In some examples of this application, a second fan is provided on the second evaporator, and the air outlet of the second fan is directed toward the heat dissipation surface of the second evaporator.

[0017] The beneficial effects of this utility model are: This invention utilizes a parallel dual-evaporator configuration to simultaneously absorb heat from different heat sources. Combined with a condenser featuring fins and a parallel-flow microchannel structure, and a rationally designed upper and lower manifold with appropriate port connections, it ensures smooth refrigerant circulation and effectively improves overall heat exchange efficiency. The vertical plate and flat tube cavity structure of the evaporator adapts to the heat source's thermal contact requirements and facilitates refrigerant recirculation. The outdoor unit uses a partition plate to divide the air duct cavity and control cavity. The first evaporator is attached to the electrical components in the control cavity, while the second evaporator is used for heat dissipation in the control cavity, assisted by a second fan. This targeted approach achieves efficient heat dissipation for the electrical components and the cavity, effectively ensuring stable equipment operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the outdoor unit of the air conditioner of this utility model; Figure 2 This is a three-dimensional schematic diagram of the internal structure of the outdoor unit of the air conditioner in Embodiment 1 of this utility model; Figure 3 This is a front view of the internal structure of the outdoor unit of the air conditioner in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the connection structure of the condenser, the first evaporator, and the second evaporator in Embodiment 1 of this utility model; Figure 5for Figure 4 The structure shown is a schematic diagram of the second-view side structure. Figure 6 for Figure 4 The diagram shows a cross-sectional view of the structure shown. Figure 7 This is a schematic diagram of the connection structure of the condenser and the first evaporator in Embodiment 2 of this utility model; Figure 8 This is an exploded view of the connection structure of the condenser and the first evaporator in Embodiment 2 of this utility model; In the diagram: 1. Upper manifold; 2. Lower manifold; 3. U-shaped tube; 4. Evaporation section; 5. Connecting section; 6. Return section; 7. Flat tube; 8. Fin; 9. Filling tube; 10. Second evaporator; 11. Condenser; 12. First evaporator; 13. First connecting tube; 14. Second connecting tube; 15. Second fan; 16. Flat tube connector; 20. Outdoor unit condenser; 21. Partition plate; 22. Control box; 23. Air duct cavity; 24. Control cavity; 25. Blade. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0021] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0024] Example 1: like Figures 1-6 As shown, this utility model provides a heat pipe cooling device with dual evaporators, comprising: The condenser 11 includes a plurality of parallel flat tubes 7, with fins 8 provided between adjacent flat tubes 7; The first evaporator 12 has a vertically arranged evaporation chamber inside, which is in thermal contact with the heating element to absorb heat and evaporate the working fluid. The second evaporator 10 is arranged in parallel with the first evaporator 12 and is used to simultaneously absorb heat from the ambient heat source and work together with the condenser to complete the circulating heat exchange of the working fluid. The upper manifold 1 is located above the condenser 11 and is used to guide the working fluid vapor generated by the first evaporator 12 and the second evaporator 10 to the condenser. The lower manifold 2 is located below the condenser 11 and is used to return the working fluid condensate to the first evaporator 12 and the second evaporator 10.

[0025] The heat pipe cooling device for dual evaporators disclosed in this application, through the coordinated design of condenser 11, first evaporator 12, second evaporator 10, upper manifold 1, and lower manifold 2, makes the heat dissipation path more complete and efficient. The condenser 11 is composed of parallel flat tubes 7 and fins 8, significantly increasing the heat exchange area with the airflow and thus accelerating the condensation rate of the working fluid vapor. The upper manifold 1, located above the condenser 11, collects and guides the vapor from both evaporators, ensuring a smooth and unobstructed flow path for the vapor towards the condenser 11. The lower manifold 2, located below the condenser 11, efficiently recovers and evenly distributes the condensate to the two parallel evaporators after it is generated, avoiding problems such as poor condensate return or uneven distribution. The first evaporator 12 has a vertically arranged evaporation chamber that directly contacts the heating element, enabling it to quickly absorb the concentrated heat and... The working fluid evaporates rapidly. The parallel arrangement of the second evaporator 10 and the first evaporator 12 can simultaneously absorb heat from the overall environment of the control chamber and promote the evaporation of the working fluid. Through the above arrangement, not only can the heat generated by the electrical components be locally dissipated, but the overall heat source of the environment can also be dissipated. The environmental heat source refers to the environment where the second evaporator 10 is located (such as the environment of the control chamber where the compressor of the outdoor unit of an air conditioner is located). Moreover, the environmental heat source is different from the heat source of the electrical heating elements, which effectively solves the problem of limited heat dissipation range and insufficient coverage of traditional devices. In addition, the arrangement of the upper and lower manifolds ensures that the steam flow direction and the condensate return path are more reasonable and coherent, making the circulating heat exchange more stable. The entire device forms a complete closed thermal cycle path through the parallel heat absorption of the two evaporators and the concentrated condensation of the condenser 11, thereby achieving a natural and efficient thermosiphon heat dissipation effect without relying on external power components.

[0026] This application employs a design that uses a first evaporator 12 in thermal contact with the heating element and a second evaporator 10 in parallel to absorb heat from the control cavity environment. This design can simultaneously cover the heat dissipation needs of both local components and the overall environment, avoiding the blind spot problem of local heat accumulation inside the cavity caused by traditional solutions that only dissipate heat to some components. It can form a highly efficient thermosiphon cycle without the assistance of additional power components, which reduces energy consumption and avoids additional noise problems. It can ensure that the control cavity can maintain a controllable temperature even in high-temperature environments, effectively improving the operational stability and lifespan of electrical components. At the same time, the entire device has a compact structure, stable operation, and is easy to install, making it suitable for outdoor units of various air conditioning and heat pump equipment.

[0027] As a preferred example of this application, the first evaporator 12 is arranged in the shape of a vertical plate, with its upper end connected to the upper manifold 1 and its lower end connected to the lower manifold 2.

[0028] In the example of this application, the first evaporator 12 is a vertical plate, and its surface can be closely attached to the heating element to directly absorb heat and vaporize the internal working fluid. Since the evaporator is vertically arranged and its upper end is connected to the upper manifold 1 and its lower end is connected to the lower manifold 2, the vaporized steam can rise naturally into the upper manifold 1 by buoyancy, while the condensate flows smoothly back to the bottom of the evaporator in the vertical direction under the action of gravity, reducing the flow resistance of the working fluid. This allows the working fluid to quickly enter the circulation path after absorbing heat and completing vaporization, and the condensed liquid can also flow smoothly back to the heat absorption area, forming a highly efficient reciprocating heat exchange cycle. Preferably, the heating element is arranged on the side of the first evaporator 12 close to the lower manifold 2, and the multiple heating elements are installed in order of power, with the heating element with higher power consumption being farther away from the lower manifold 2.

[0029] As a preferred example of this application, the first evaporator 12 includes one or more cavities, and the flat tube 7 of the condenser 11 includes a parallel flow microchannel structure.

[0030] In the examples of this application, the first evaporator 12 adopts a flat tube heat exchanger or a plate heat exchanger with an internal cavity structure. Its interior includes one or more vertically arranged cavities to accommodate the volume expansion of the working fluid during heat absorption and vaporization, avoiding space constraints that could affect vaporization efficiency. Simultaneously, the flat tube or plate structure itself has a large contact area, allowing it to fit tightly against the heating element, enabling heat to be transferred to the working fluid at a faster rate, achieving rapid heat absorption and efficient vaporization. The flat tube 7 in the condenser 11 adopts a parallel flow microchannel structure, which can disperse the steam into multiple... The multiple fine streams increase the heat exchange contact area with the fins 8 and the outside environment. At the same time, the flow pattern of multiple fine streams reduces the flow resistance of steam during the condensation process, reduces local heat accumulation and phase change lag, and enables the working fluid to condense more smoothly. Therefore, the vertical cavity of the first evaporator 12 and the parallel flow microchannel of the condenser 11 form a synergistic effect. One optimizes the evaporation process and the other optimizes the condensation process. Together, they ensure that the two key links of vaporization and condensation of the working fluid can be completed efficiently in the entire thermal cycle, thereby promoting the stable and continuous operation of the thermosiphon cycle.

[0031] As a preferred example of this application, the flat tube 7 of the first evaporator 12 and the condenser 11 have substantially the same cross-sectional length.

[0032] In the example of this application, the above design can ensure that the connection size of the flat tube 7 and the upper and lower manifolds are matched, reducing the flow resistance of the working fluid at the connection point; at the same time, it can make the flow cross section of the working fluid between the first evaporator 12 and the condenser 11 transition smoothly, avoiding working fluid retention or flow fluctuation caused by abrupt changes in cross section, and ensuring the stability of working fluid circulation and heat exchange uniformity.

[0033] As a preferred example of this application, the upper end of the second evaporator 10 is connected to the upper manifold 1 via the first connecting pipe 13, and the connection position between the second evaporator 10 and the upper manifold 1 is located near the connection position between the first evaporator 12 and the upper manifold 1. The lower end of the second evaporator 10 is connected to the lower manifold 2 via the second connecting pipe 14, and the connection position between the second evaporator 10 and the lower manifold 2 is located near the connection position between the first evaporator 12 and the lower manifold 2.

[0034] In the example of this application, by connecting the second evaporator 10 to the upper manifold 1 and the lower manifold 2 close to the connection position of the first evaporator 12, the working fluid of the two evaporators can be more evenly distributed in the manifold. In the upper manifold 1, the steam generated by the two evaporators can converge and flow to the condenser 11 without long-distance flow. In the lower manifold 2, the condensate can also be distributed to the two evaporators nearby, avoiding the working fluid deviation caused by the connection position being too far away, and ensuring the synergistic heat absorption of the two evaporators.

[0035] As a preferred example of this application, the second evaporator 10 and the first evaporator 12 form a height difference in the vertical direction, and the length of the second evaporator 10 in the vertical direction is greater than the length of the first evaporator 12 in the vertical direction. Preferably, the upper end of the first evaporator 12 is higher than the upper surface of the second evaporator 10, and the lower end of the first evaporator 12 is lower than the lower surface of the second evaporator 10.

[0036] In the example of this application, the vertical height difference between the second evaporator 10 and the first evaporator 12 optimizes the force conditions of the condensate during the reflux process, preventing reduced circulation efficiency due to liquid stagnation. Simultaneously, it enhances the driving effect of gravity on the working fluid circulation, enabling the system to stably maintain a highly efficient thermosiphon cycle under multi-heat source conditions. Since the upper and lower ends of the first evaporator 12 exceed the height range of the second evaporator 10, it can preferentially receive condensate reflux to ensure direct heat dissipation from the heating elements, preventing localized overheating due to insufficient liquid supply. While the second evaporator 10 is shorter, its total evaporation area is expanded by increasing the lateral expansion area or using a multi-channel structure, allowing it to operate over a larger area. The system absorbs heat input from another heat source or the environment in a dispersed manner, enhancing the overall vaporization capacity of the working fluid. The two evaporators work synergistically in the two key stages of reflux and evaporation. The first evaporator 12 focuses on ensuring rapid reflux of the condensate and efficient heat dissipation of the heating elements, while the second evaporator 10 relies on its larger evaporation area to guarantee overall heat handling capacity. This allows the system to respond quickly to localized high temperatures while maintaining overall heat dissipation balance. Thus, the combined action of the two evaporators achieves continuous and stable circulation driven by thermosiphon, improving heat dissipation efficiency and cycle reliability under multi-heat source conditions. Simultaneously, it avoids the problem of overload or idleness of a single evaporator, ensuring that the device maintains a highly efficient, balanced, and energy-saving operating state in different operating environments. In the example of this application, the second evaporator 10 can be a finned heat exchanger or a plate heat exchanger.

[0037] As a preferred example of this application, the bottom of the upper manifold 1 is provided with a plurality of ports evenly distributed along its length. The bottom end of the upper manifold 1 is directly connected to the upper end of the first evaporator 12, and the end of the upper manifold 1 near the second evaporator 10 is connected to the first connecting pipe 13. The top of the lower manifold 2 is provided with a plurality of flat pipe connection ports 16 evenly distributed along its length. The top end of the lower manifold 2 is directly connected to the lower end of the first evaporator 12, and the end of the lower manifold 2 near the second evaporator 10 is connected to the second connecting pipe 14.

[0038] In the example of this application, the bottom end of the upper manifold 1 is directly connected to the first evaporator 12, and the end near the second evaporator 10 is connected to the first connecting pipe 13. The top end of the lower manifold 2 is directly connected to the first evaporator 12, and the end near the second evaporator 10 is connected to the second connecting pipe 14. This design can shorten the flow path of the working fluid in the manifold. The working fluid of the first evaporator 12 can directly enter the manifold, and the working fluid of the second evaporator 10 can quickly flow in through the adjacent connecting pipe. This reduces the retention and flow resistance of the working fluid in the manifold, ensures the supply and return speed of the working fluid of the two evaporators, and improves the overall circulation efficiency of the system.

[0039] This application also discloses an outdoor unit, such as Figures 1-3 As shown, the unit includes a duct cavity 23 and a control cavity 24 separated by a partition plate 21. The outdoor unit condenser 20 and blades 25 are located in the duct cavity 23. The control box 22 is located in the control cavity 24 and is mounted on the partition plate 21. The first evaporator 12 is mounted on the partition plate 21. Electrical components in the control cavity 24 are attached to the surface of the first evaporator 12. The second evaporator 10 is located in the control cavity 24 to dissipate heat from the control cavity 24. The condenser 11 is located in the duct cavity 23.

[0040] In the example of this application, the outdoor unit isolates the air duct cavity 23 from the control cavity 24 through the partition plate 21 to avoid mutual heat interference between the two cavities. The first evaporator 12 is installed on the partition plate 21, and the electrical components of the control cavity 24 are attached to its surface to directly absorb the heat generated by the components. The second evaporator 10 is located in the control cavity 24 and absorbs the overall heat of the cavity. The steam generated by the two evaporators enters the condenser 11 in the air duct cavity 23 through the upper manifold 1. The condenser 11 and the blades 25 work together to dissipate the heat to the outside. The condensed working fluid flows back to the two evaporators through the lower manifold 2, forming an independent cycle of heat absorption by the components and concentrated condensation after heat absorption by the cavity, thereby achieving targeted heat dissipation.

[0041] As a preferred example of this application, a second fan 15 is provided on the second evaporator 10, and the air outlet of the second fan 15 is directed toward the heat dissipation surface of the second evaporator 10.

[0042] In the example of this application, air is directed towards the heat dissipation surface of the second evaporator 10 by the second fan 15. Forced convection accelerates the airflow over the evaporator surface, carrying away more heat and causing the working fluid inside the evaporator to condense into liquid more quickly. The condensate flows back to the bottom of the evaporator under the influence of gravity and circulation, re-participating in the heat absorption and vaporization process, thus enhancing the heat dissipation rate within the control chamber 24 and preventing heat accumulation. Preferably, the second fan 15 is an electrostatic fan.

[0043] Example 2: like Figures 7-8 As shown, the difference between this embodiment and Embodiment 1 is that: In the example of this application, the first evaporator 12 includes a U-shaped tube 3, which includes an evaporation section 4, a connecting section 5 and a reflux section 6 connected in sequence. The evaporation section 4 is longer than the reflux section 6 and forms a height difference in the vertical direction. The evaporation section 4 is used to make heat conduction contact with a heat source, and the reflux section 6 is used to receive the refrigerant recirculated from the condenser 11.

[0044] In the example of this application, a predetermined amount of working fluid is injected into the heat pipe heat dissipation device through the liquid filling pipe 9 connected to the bottom of the lower manifold 2. In the working state, the U-shaped tube 3 of the first evaporator 12 forms a closed path through the evaporation section 4, the connecting section 5, and the return section 6. The evaporation section 4 is in contact with the heat source and absorbs heat to vaporize the working fluid. The vapor flows to the condenser 11 through the connecting section 5. The condensed liquid returns to the evaporation section 4 through the return section 6 to complete the cycle. Since the evaporation section 4 is longer than the return section 6 and forms a vertical height difference, the gravity difference can be used to enhance the return flow force of the condensate to the evaporation section 4. At the same time, the longer evaporation section 4 can prolong the contact time with the heat source and improve the heat absorption effect.

[0045] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A heat pipe cooling device with dual evaporators, characterized in that, include: The condenser (11) includes a plurality of parallel flat tubes (7), with fins (8) between adjacent flat tubes (7). The first evaporator (12) has a vertically arranged evaporation chamber inside, which is in thermal contact with the heating element to absorb heat and evaporate the working fluid; The second evaporator (10) is connected in parallel with the first evaporator (12) and is used to absorb heat from the ambient heat source and to complete the circulating heat exchange of the working fluid together with the condenser. The upper manifold (1) is located above the condenser (11) and is used to guide the working fluid vapor generated by the first evaporator (12) and the second evaporator (10) to the condenser. The lower manifold (2) is located below the condenser (11) and is used to return the working fluid condensate to the first evaporator (12) and the second evaporator (10).

2. The heat pipe cooling device with dual evaporators as described in claim 1, characterized in that, The first evaporator (12) is arranged in the shape of a vertical plate, with its upper end connected to the upper manifold (1) and its lower end connected to the lower manifold (2).

3. The heat pipe cooling device with dual evaporators as described in claim 1, characterized in that, The first evaporator (12) includes a U-shaped tube (3), which includes an evaporation section (4), a connecting section (5), and a reflux section (6) connected in sequence. The evaporation section (4) is longer than the reflux section (6) and forms a height difference in the vertical direction. The evaporation section (4) is used to make heat conduction contact with the heat source. The reflux section (6) is used to receive the refrigerant working fluid returning from the condenser (11).

4. The heat pipe cooling device with dual evaporators as described in claim 1, characterized in that, The first evaporator (12) adopts a flat tube heat exchanger or a plate heat exchanger with an internal cavity structure, which includes one or more vertically arranged cavities. The flat tube (7) of the condenser (11) includes a parallel flow microchannel structure.

5. The heat pipe cooling device with dual evaporators as described in claim 4, characterized in that, The flat tube main structure of the first evaporator (12) has a cross-sectional length that is basically the same as that of the flat tube (7) in the condenser (11).

6. A heat pipe cooling device with dual evaporators as described in any one of claims 1-5, characterized in that: The upper end of the second evaporator (10) is connected to the upper manifold (1) through the first connecting pipe (13), and the connection position between the second evaporator (10) and the upper manifold (1) is set close to the connection position between the first evaporator (12) and the upper manifold (1). The lower end of the second evaporator (10) is connected to the lower manifold (2) through the second connecting pipe (14), and the connection position between the second evaporator (10) and the lower manifold (2) is set close to the connection position between the first evaporator (12) and the lower manifold (2).

7. A heat pipe cooling device with dual evaporators as described in claim 6, characterized in that, The second evaporator (10) and the first evaporator (12) form a height difference in the vertical direction, and the length of the second evaporator (10) in the vertical direction is greater than the length of the first evaporator (12) in the vertical direction.

8. The heat pipe cooling device with dual evaporators as described in claim 1, characterized in that, The bottom of the upper manifold (1) is provided with multiple ports evenly in the length direction. The bottom end of the upper manifold (1) is directly connected to the upper end of the first evaporator (12), and the end of the upper manifold (1) near the second evaporator (10) is connected to the first connecting pipe (13). The top of the lower manifold (2) is provided with multiple flat pipe connecting ports (16) evenly in the length direction. The top end of the lower manifold (2) is directly connected to the lower end of the first evaporator (12), and the end of the lower manifold (2) near the second evaporator (10) is connected to the second connecting pipe (14).

9. An outdoor unit, characterized in that, The device includes a duct cavity (23) and a control cavity (24) separated by a partition plate (21). The outdoor unit condenser (20) and blades (25) are located in the duct cavity (23). The control box (22) is located in the control cavity (24) and is mounted on the partition plate (21). The first evaporator (12) in the heat pipe heat dissipation device according to any one of claims 1 to 8 is mounted on the partition plate (21). The electrical components in the control cavity (24) are attached to the surface of the first evaporator (12). The second evaporator (10) is located in the control cavity (24) to dissipate heat from the control cavity (24). The condenser (11) is located in the duct cavity (23).

10. The outdoor unit as described in claim 9, characterized in that, A second fan (15) is provided on the second evaporator (10), and the air outlet of the second fan (15) is directed toward the heat dissipation surface of the second evaporator (10).

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