Gravity heat pipe heat exchanger

Abstract

The utility model provides a gravity assisted heat pipe heat exchanger, which belongs to the technical field of heat exchangers and comprises a first channel for a first heat exchange working medium to circulate and a second channel for a second heat exchange working medium to circulate. A plurality of gravity assisted heat pipes are connected between the first channel and the second channel; one part of each gravity heat pipe is located in the first channel, and the other part of each gravity heat pipe is located in the second channel; a plurality of flow guide plates are arranged in the first channel and divide the first channel into a plurality of flow guide compartments, and every two adjacent flow guide compartments are communicated; the flowing direction of the first heat exchange working medium in each flow guide compartment is perpendicular to the flowing direction of the second heat exchange working medium in the second channel, and the flowing directions of the first heat exchange working medium in every two adjacent flow guide compartments are opposite. According to the utility model, the heat exchange between the heat exchange working medium and the gravity assisted heat pipe is more sufficient, and the heat exchange effect is improved; the flow distance of the heat exchange working medium is increased, the effective heat exchange time between the heat exchange working medium and the gravity assisted heat pipe is prolonged, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and in particular to a gravity heat pipe heat exchanger which can adapt to heat exchange between low-temperature flue gas and cold water. Background Art

[0002] The statements in this section merely provide background technology related to the present invention and do not necessarily constitute prior art.

[0003] Heat pipe heat exchanger is a heat exchange device that uses heat pipe elements for phase change heat transfer. At present, due to the high efficiency, flexibility and reliability of heat pipes, they have been widely used in waste heat recovery, air conditioning dehumidification, electronic equipment heat dissipation, medical equipment temperature control and other fields.

[0004] The commonly used gas-liquid heat pipe heat exchanger currently uses water as the cooling medium on its condensing side. However, the existing water-side heat exchange structure design has problems such as insufficient heat exchange with the heat pipe, large cooling water flow resistance, low flow rate and insufficient disturbance. These factors will cause the temperature difference between the cooling water inlet and outlet to decrease, which in turn affects the overall heat exchange efficiency of the heat pipe heat exchanger. Utility Model Content

[0005] The purpose of the utility model is to provide a gravity heat pipe heat exchanger that can adapt to heat exchange between low-temperature flue gas and cold water, so as to solve at least one technical problem existing in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a gravity heat pipe heat exchanger, comprising a first channel for a first heat exchange medium to flow, and a second channel for a second heat exchange medium to flow; a plurality of gravity heat pipes are connected between the first channel and the second channel; a portion of each of the gravity heat pipes is located in the first channel to perform heat exchange with the first heat exchange medium, and a portion of each of the gravity heat pipes is located in the second channel to perform heat exchange with the second heat exchange medium;

[0008] A plurality of guide plates are arranged in the first channel, and the plurality of guide plates divide the first channel into a plurality of guide compartments, and two adjacent guide compartments are connected; the flow direction of the first heat exchange medium in each guide compartment is perpendicular to the flow direction of the second heat exchange medium in the second channel, and the flow directions of the first heat exchange medium in two adjacent guide compartments are opposite; the guide compartment that the first heat exchange medium first enters is the first guide compartment, and the guide compartment that the first heat exchange medium last flows out of is the terminal guide compartment.

[0009] Furthermore, the first channel includes a water tank connected to the second channel, one end of the water tank is provided with a first inlet for the first heat exchange medium to flow into the first guide compartment, and the other end of the water tank is provided with a first outlet for the first heat exchange medium to flow out of the terminal guide compartment.

[0010] Furthermore, the water tank includes two first side plates connected to the second channel and arranged opposite to each other; and two adjacent guide plates are respectively connected to two opposite first side plates.

[0011] Furthermore, the second channel includes a channel body connected to the two first side plates, one end of the channel body is provided with a second inlet for the second heat exchange medium to flow in, and the other end of the channel body is provided with a second outlet for the second heat exchange medium to flow out.

[0012] Furthermore, at least one gravity heat pipe is disposed in each of the flow-conducting compartments.

[0013] Furthermore, the channel body is in the shape of a cuboid.

[0014] Furthermore, the bottom height of the water tank gradually decreases in the direction from the first inlet to the first outlet.

[0015] Furthermore, the bottom height of the channel body gradually decreases in the direction from the second inlet to the second outlet, and a condensed water outlet is provided on a side close to the second outlet.

[0016] Furthermore, a plurality of heat exchange fins are sequentially arranged on the radial end surface of the portion of the gravity heat pipe extending into the second channel.

[0017] Furthermore, the heat exchange fins are annular.

[0018] The utility model has the following beneficial effects: it can make the heat exchange between the heat exchange medium and the gravity heat pipe more complete, thereby improving the heat exchange effect; it increases the flow distance of the heat exchange medium, prolongs the effective heat exchange time between the heat exchange medium and the gravity heat pipe, and improves the heat exchange efficiency.

[0019] Additional aspects and advantages of the present invention will be partially given in the following description, which will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a three-dimensional structural diagram of the gravity heat pipe heat exchanger described in Example 1 of the utility model.

[0022] Figure 2 This is a three-dimensional structural diagram of the gravity heat pipe heat exchanger described in Example 1 of the utility model after removing the top plate of the water tank.

[0023] Figure 3 This is a top view of the structure of the gravity heat pipe heat exchanger described in Example 1 of the utility model after removing the top plate of the water tank.

[0024] Figure 4 This is a side structural diagram of the gravity heat pipe heat exchanger described in Example 1 of the utility model after removing the top plate of the water tank.

[0025] Figure 5 for Figure 4 Structural section view along AA axis.

[0026] Figure 6 This is a three-dimensional structural diagram of a single gravity heat pipe of the gravity heat pipe heat exchanger described in Example 1 of the utility model.

[0027] Figure 7 This is a bottom view of the structure of the gravity heat pipe heat exchanger described in Example 1 of the utility model.

[0028] Figure 8 This is a three-dimensional structural diagram of the gravity heat pipe heat exchanger described in Example 2 of the utility model.

[0029] Fig. 9 This is a three-dimensional structural diagram of the gravity heat pipe heat exchanger described in Example 2 of the utility model after removing the top plate of the water tank.

[0030] Fig.10 This is a top view of the structure of the gravity heat pipe heat exchanger described in Example 2 of the utility model after removing the top plate of the water tank.

[0031] Fig.11 This is a side structural diagram of the gravity heat pipe heat exchanger described in Example 2 of the utility model after removing the top plate of the water tank.

[0032] Fig.12 for Fig.11 Structural section view along AA axis.

[0033] Fig.13This is a bottom view of the structure of the gravity heat pipe heat exchanger described in Example 2 of the utility model.

[0034] Among them: 1-first channel; 2-second channel; 3-gravity heat pipe; 4-guide plate; 5-guide compartment; 6-water tank; 7-first inlet; 8-first outlet; 9-first side plate; 10-channel body; 11-second inlet; 12-second outlet; 13-heat exchange fins; 14-top plate; 15-first bottom plate; 16-end plate; 17-second bottom plate; 18-connecting inclined plate; 19-second side plate; 20-trapezoidal plate; 21-condensate outlet; 22-rounded corner; 23-external circular tube. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below by the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0036] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which the present invention belongs.

[0037] It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have a meaning consistent with that in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless as defined herein.

[0038] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or groups thereof.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0040] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] In the description of this specification, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present technology and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present technology.

[0042] Unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in this technology can be understood according to specific circumstances.

[0043] To facilitate the understanding of the present invention, the present invention is further explained below with reference to specific embodiments in conjunction with the accompanying drawings, and the specific embodiments do not constitute a limitation on the embodiments of the present invention.

[0044] Those skilled in the art should understand that the drawings are merely schematic diagrams of embodiments, and the components in the drawings are not necessarily necessary for implementing the present invention.

[0045] like Figures 1 to 7 As shown, this embodiment 1 provides a gravity heat pipe heat exchanger, including a first channel 1 for a first heat exchange medium to flow, and a second channel 2 for a second heat exchange medium to flow; a plurality of gravity heat pipes 3 are connected between the first channel 1 and the second channel 2. Among them, the gravity heat pipe is also a thermosyphon, which is a type of heat pipe. Like ordinary heat pipes, it uses the vaporization and condensation of the medium and the automatic circulation of the medium without external power to transfer heat. The difference between it and ordinary heat pipes is that there is no liquid wick in the pipe, and the condensate flows back from the condensation section to the evaporation section not by the capillary force generated by the liquid wick, but by the gravity of the condensate itself. Therefore, the thermosyphon is also called a gravity heat pipe.

[0046] In this embodiment, a part of each of the gravity heat pipes 3 is located in the first channel 1 to perform heat exchange with the first heat exchange medium, and a part of each of the gravity heat pipes 3 is located in the second channel 2 to perform heat exchange with the second heat exchange medium. There is a temperature difference between the first heat exchange medium and the second heat exchange medium. For example, the temperature of the second heat exchange medium flowing in the second channel 2 is higher than the temperature of the first heat exchange medium in the first channel 1. The first channel 1 is above the second channel 2. A part of the gravity heat pipe 3 in the second channel 2 performs heat exchange with the second heat exchange medium as an evaporation section, and a part of the gravity heat pipe 3 in the first channel 1 performs heat exchange with the first heat exchange medium as a condensation section. The medium in the gravity heat pipe 3 absorbs the heat of the second heat exchange medium in the evaporation section and vaporizes, and rises to the condensation section to transfer the heat to the first heat exchange medium, thereby realizing heat exchange between the first heat exchange medium and the second heat exchange medium.

[0047] For example, in this embodiment, the first heat exchange medium can be water, and the second heat exchange medium can be flue gas. Flue gas flows into the second channel 2 from one end of the second channel 2. The flue gas flowing into the second channel 2 has a high temperature and is hot flue gas. After heat exchange with the gravity heat pipe 3, it flows out of the second channel 2 from the other end of the second channel 2. The flue gas flowing out of the second channel 2 has a lower temperature and becomes cold flue gas. Water flows into the first channel 1 from one end of the first channel 1. The water flowing into the first channel 1 has a low temperature and is cold water. After heat exchange with the gravity heat pipe 3, it flows out of the first channel 1 from the other end of the first channel 1. The water flowing out of the first channel 1 has a higher temperature and becomes hot water. In summary, hot flue gas flows into the second channel 2 from one end of the second channel 2, and heat exchanges with the evaporation section of the gravity heat pipe 3 in the second channel 2. The hot flue gas transfers heat to the working medium in the evaporation section. The working medium in the evaporation section vaporizes and rises to the condensation section. The vaporized hot working medium in the condensation section exchanges heat with the water in the first channel 1. After transferring heat to the water, it condenses and liquefies and flows into the evaporation section.

[0048] Among them, a plurality of guide plates 4 are arranged in the first channel 1, and the plurality of guide plates 4 divide the first channel 1 into a plurality of guide compartments 5, and two adjacent guide compartments 5 are connected; the first heat exchange medium flows from one guide compartment 5 to another adjacent guide compartment 5, and the flow direction of the first heat exchange medium in each guide compartment 5 is perpendicular to the flow direction of the second heat exchange medium in the second channel 2, and the flow directions of the first heat exchange medium in two adjacent guide compartments 5 are opposite, thereby increasing the flow distance of the first heat exchange medium in the first channel 1, thereby improving the heat exchange effect and heat exchange efficiency. For example, in this embodiment, the flow direction of the flue gas in the second channel 2 is to enter from the left end of the second channel 2 and flow to the right end of the second channel. The flow direction of the flue gas is the first direction, and the setting direction of the guide plate 4 is perpendicular to the first direction. The water that first flows into the first channel 1 flows along the guide plate 4, flows to the other end of the guide plate 4, and then flows into another adjacent guide compartment 5. In the other adjacent guide compartment 5, the flow direction of the water is exactly opposite to the flow direction in the previous guide compartment 5, and so on, until it flows out of the last guide compartment 5. The guide compartment 5 that the first heat exchange working medium first enters is the first guide compartment, and the guide compartment 5 that the first heat exchange working medium finally flows out of is the terminal guide compartment.

[0049] In this embodiment, the first channel 1 includes a water tank 6 connected to the second channel 2, one end of the water tank 6 is provided with a first inlet 7 for the first heat exchange medium to flow into the first guide compartment, and the other end of the water tank 6 is provided with a first outlet 8 for the first heat exchange medium to flow out of the terminal guide compartment. Specifically, the water tank 6 includes two first side plates 9 connected to the second channel 2 and arranged opposite to each other, and the water tank 6 may also include a first bottom plate 15 connected to the second channel 2, both sides of the first bottom plate 15 are connected to a first side plate 9, both ends of the first bottom plate 15 are connected to an end plate 16, the tops of the two first side plates 9 and the two end plates 16 are connected to a top plate 14, and the first bottom plate 15, the top plate 14 and the two first side plates 9 and the two end plates 16 together surround the water tank 6. Among them, two adjacent guide plates 4 are respectively connected to two opposite first side plates 9.

[0050] For example, in this embodiment, Figure 2As shown, the guide compartment 5 that the first heat exchange medium first enters is the first guide compartment, the front end of the guide plate 4 on the far left is connected to the first side plate 9 on the front side, the bottom end is connected to the first bottom plate 15, the top end is connected to the top plate 14, and the end plate 16 on the left end forms the first guide compartment, and there is a gap between the rear end of the guide plate 4 on the far left and the first side plate 9 on the rear side. The rear end of the guide plate 4 adjacent to the guide plate 4 forming the first guide compartment is connected to the first side plate 9 on the rear side, its bottom end is also connected to the first bottom plate 15, its top end is also connected to the top plate 14, and there is a gap between its front end and the first side plate 9 on the front side. The adjacent guide plates 4 are arranged in sequence as described above, and the first heat exchange medium in the first guide compartment flows from the gap on the rear side to the second guide compartment adjacent to the first guide compartment, and the second heat exchange medium in the second guide compartment flows from the gap on the front side to the third guide compartment adjacent to the second guide compartment, until it flows out of the water tank 6 from the terminal guide compartment.

[0051] In this embodiment, in order to reduce the resistance of the first heat exchange medium when it flows and turns between two adjacent guide compartments, the portion where the guide plate 4 and the first side plate 9 are connected is set to be a rounded corner 22 .

[0052] like Figure 2 As shown, in this embodiment, the number of the guide plates 4 is 11, which is an odd number, and a total of 12 guide compartments 5 are formed. The guide plate 4 at the far left is connected to the first side plate 9 at the front side, and the guide plate 4 at the far right is also connected to the first side plate 9 at the front side. The first inlet 7 and the first outlet 8 are both arranged on the first side plate 9 at the front side. In specific applications, the number of the guide plates 4 is not limited by the above number. Those skilled in the art can set the number of guide plates 4 according to specific circumstances, such as 10 or 12, or more. Of course, the more the number of guide plates 4 is set, the longer the flow distance of the first heat exchange medium in the first channel 1. When the number of the guide plates 4 is an even number, the guide plate 4 at the far left and the guide plate 4 at the far right are arranged on different first side plates 9, and similarly, the first inlet 7 and the first outlet 8 are also arranged on different first side plates 9, respectively.

[0053] The above-mentioned first inlet 7 and first outlet 8 are arranged in such a manner that the first inlet 7 is arranged on the first side plate 9 on the front side. If the first inlet 7 is arranged on the first side plate 9 on the rear side in the figure, the rear end of the leftmost guide plate 4 is first connected to the first side plate 9 on the rear side. Similarly, whether the first outlet 8 is arranged on the first side plate 9 on the front side or on the first side plate 9 on the rear side is related to whether the number of guide plates 4 is odd or even. The fundamental principle is based on the flow direction of the first heat exchange medium in the terminal guide compartment. For example, if the first heat exchange medium flows from the first side plate 9 on the rear side to the first side plate 9 on the front side in the terminal guide compartment, the first outlet 8 is arranged on the first side plate 9 on the front side; if the first heat exchange medium flows from the first side plate 9 on the front side to the first side plate 9 on the rear side in the terminal guide compartment, the first outlet 8 is arranged on the first side plate 9 on the rear side.

[0054] In this embodiment, the second channel 2 includes a channel body 10 connected to the two first side plates 9, one end of the channel body 10 is provided with a second inlet 11 for the second heat exchange medium to flow in, and the other end of the channel body 10 is provided with a second outlet 12 for the second heat exchange medium to flow out. Specifically, in this embodiment, the channel body 10 includes a second bottom plate 17, both sides of the second bottom plate 17 are connected to a second side plate 19, both ends of the second bottom plate 17 are connected to a trapezoidal plate 20, both ends of the two second side plates 19 are also connected to a trapezoidal plate 20, and the top ends of the two second side plates 19 are also connected to a trapezoidal plate 20. In this way, both ends of the channel body 10 include four trapezoidal plates 20, the four trapezoidal plates 20 at the left end together surround the second inlet 11, and the four trapezoidal plates 20 at the right end together surround the second outlet 12. In this embodiment, the second inlet 11 and the second outlet 12 surrounded by the trapezoidal plates 20 are both quadrangular pyramid-shaped, and the smaller holes surrounded by the four trapezoidal plates 20 face outward.

[0055] In this embodiment, the first bottom plate 15 of the water tank 6 is located at the top of the channel body 10, and together with the two second side plates 19 and the second bottom plate 17, the channel body 10 is in the shape of a rectangular parallelepiped, and the shape of the water tank 6 is also in the shape of a rectangular parallelepiped. The channel body 10, the second inlet 11 and the second outlet 12 together form the second channel 2. The tops of the two second side plates 19 are connected to the first bottom plate 15 and the first side plate 9 of the water tank 6 through a connecting inclined plate 18, and then the two ends of the first bottom plate 15 are also connected to a trapezoidal plate 20 through a connecting inclined plate 18.

[0056] In this embodiment, Figures 1 to 7As shown, the first inlet 7 and the second inlet 11 are located at the same end, and the first outlet 8 and the second outlet 12 are located at the same end, so that the overall flow direction of the first heat exchange medium in the first channel 1 is consistent with the flow direction of the second heat exchange medium in the second channel 2. In specific applications, the first inlet 7 and the second inlet 11 can be set at different ends, and the first outlet 8 and the second outlet 12 are also located at different ends. For example, the first inlet 7 is located at the left end of the water tank 6, and the second inlet 11 is located at the right end of the channel body 10, the first outlet 8 is located at the right end of the water tank 6, and the second outlet 12 is located at the left end of the channel body 10. In this way, the first heat exchange medium flows into the water tank 6 from the first inlet 7 and then flows out of the water tank 6 from the first outlet 8, while the second heat exchange medium flows into the channel body 10 from the second inlet 11 and flows out of the channel body 10 from the second outlet 12. In this way, the overall flow directions of the first heat exchange medium and the second heat exchange medium are opposite, which can greatly improve the heat exchange effect and heat exchange efficiency.

[0057] In this embodiment, in order to increase the flow rate of the first heat exchange medium in the water tank 6, the bottom height of the water tank 6 gradually decreases in the direction from the first inlet 7 to the first outlet 8. Figure 5 As shown, the thickness of the first bottom plate 15 gradually decreases from the left end to the right end, that is, the thickness of the left end of the first bottom plate 15 is the thickest. The first heat exchange medium flows into the water tank 6 from the first inlet 7, and after heat exchange, flows out of the water tank 6 from the first outlet 8. The whole flow is from high to low, thereby increasing the flow speed of the first heat exchange medium.

[0058] In order to improve the heat exchange efficiency and heat exchange quality between the second heat exchange medium and the gravity heat pipe 3, a plurality of heat exchange fins 13 are sequentially arranged on the radial end surface of the portion of the gravity heat pipe 3 extending into the second channel 2 (i.e., the evaporation section). Figure 6 As shown, the heat exchange fins 13 are annular and are sequentially sleeved and connected to the gravity heat pipe 3 from top to bottom. Similarly, the portion of the gravity heat pipe 3 extending into the water tank 6 (i.e., the condensation section) can also be provided with the same heat exchange fins. However, in this embodiment, in order to consider reducing the influence of the flow disturbance of the first heat exchange medium, the heat exchange fins 13 are not provided in the condensation section.

[0059] Specifically, the gravity heat pipe 3 passes through the first bottom plate 15, so that a portion of it is located in the channel body 10 as an evaporation section. In a specific embodiment, a socket connected to the channel body 10 can also be provided on the first bottom plate 15, and a sealing ring is provided around the socket. The gravity heat pipe 3 passes through the socket so that a portion of it extends into the channel body 10 as an evaporation section.

[0060] At least one gravity heat pipe 3 is disposed in each of the flow guiding compartments 5. For example, one gravity heat pipe 3 or at least two gravity heat pipes 3 may be disposed in each of the flow guiding compartments 5. Figure 2 , Figure 3 As shown, a total of 30 gravity heat pipes are provided, with 3 and 2 being provided in two adjacent flow guide compartments 5 respectively.

[0061] The gravity heat pipe heat exchanger is applied to the heat exchange between hot flue gas and cold water. For example, when cold water flows into the water tank 6 from the first inlet 7, the hot flue gas flows into the channel body 10 from the second inlet 11. The hot flue gas transfers heat to the evaporation section of the gravity heat pipe 3 in the channel body 10. The working medium in the evaporation section is vaporized and rises to the condensation section to transfer heat to the cold water in the water tank 6. The gaseous working medium is liquefied by the cold water and then sinks to the evaporation section. The hot flue gas meets the liquefied medium in the evaporation section and condenses to produce condensed water. In this embodiment, Figure 7 As shown, a condensed water outlet 21 is provided at the bottom of the right end of the second bottom plate 17, so that the condensed water can flow out of the channel body 10. In this embodiment, in order to ensure that the condensed water can flow out of the channel body 10, the bottom height of the channel body is gradually reduced in the direction from the second inlet 11 to the second outlet 12, that is, the thickness of the second bottom plate 17 gradually decreases from the left end to the right end, that is, the thickness of the left end of the second bottom plate 17 is the thickest. In the channel body 10, the condensed water generated on the gravity heat pipe 3 flows along the second bottom plate 17 to the right end, and flows out of the channel body 10 through the condensed water outlet 21.

[0062] like Figures 8 to 13 As shown, a gravity heat pipe heat exchanger is provided in this embodiment 2. Different from the embodiment 1, the ends of the quadrangular pyramid-shaped second inlet 11 and the second outlet 12 at both ends of the channel body 10 are connected with an external circular tube 23 to facilitate the connection of a circular flue gas duct. In addition, different from the embodiment 1, the first outlet 8 is arranged on the end plate 16 at the end away from the first inlet 7, rather than on the first side plate 9. Specifically, the position of the first outlet 8 on the end plate 16 is close to the side of the first side plate 9 on the front side or the side of the first side plate 9 on the rear side, and is arranged according to the same principle as the flow direction of the first heat exchange medium in the guide compartment 5 in the embodiment 1. For example, if the first heat exchange medium flows from the first side plate 9 at the rear side to the first side plate 9 at the front side in the terminal flow guide compartment, the position of the first outlet 8 on the end plate 16 is close to the first side plate 9 at the front side; if the first heat exchange medium flows from the first side plate 9 at the front side to the first side plate 9 at the rear side in the terminal flow guide compartment, the position of the first outlet 8 on the end plate 16 is close to the first side plate 9 at the rear side. In this embodiment 2, the first inlet 7 is arranged on the first side plate at the front side, and the number of the guide plates 4 is the same as that in the embodiment 1, both of which are 11, and the position of the first outlet 8 on the end plate 16 is close to the first side plate 9 at the front side in the figure.

[0063] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution disclosed in the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work should be included in the scope of protection of the utility model.

Claims

1. A gravity heat pipe heat exchanger, comprising a first channel (1) for a first heat exchange medium to flow through, and a second channel (2) for a second heat exchange medium to flow through; characterized in that: A plurality of gravity heat pipes (3) are connected between the first channel (1) and the second channel (2); a portion of each gravity heat pipe (3) is located in the first channel (1) to perform heat exchange with the first heat exchange medium, and a portion of each gravity heat pipe (3) is located in the second channel (2) to perform heat exchange with the second heat exchange medium; A plurality of guide plates (4) are provided in the first channel (1), the plurality of guide plates (4) divide the first channel (1) into a plurality of guide compartments (5), and two adjacent guide compartments (5) are connected; the direction in which the first heat exchange medium flows in each of the guide compartments (5) is perpendicular to the direction in which the second heat exchange medium flows in the second channel (2), and the directions in which the first heat exchange medium flows in two adjacent guide compartments (5) are opposite; the guide compartment (5) into which the first heat exchange medium first enters is the first guide compartment, and the guide compartment (5) out of which the first heat exchange medium last flows is the terminal guide compartment.

2. The gravity heat pipe heat exchanger according to claim 1, characterized in that: The first channel (1) comprises a water tank (6) connected to the second channel (2); one end of the water tank (6) is provided with a first inlet (7) for the first heat exchange medium to flow into the first flow guide compartment; the other end of the water tank (6) is provided with a first outlet (8) for the first heat exchange medium to flow out of the terminal flow guide compartment.

3. The gravity heat pipe heat exchanger according to claim 2, characterized in that: The water tank (6) comprises two first side plates (9) connected to the second channel (2) and arranged opposite to each other; two adjacent guide plates (4) are respectively connected to two opposite first side plates (9).

4. The gravity heat pipe heat exchanger according to claim 3, characterized in that: The second channel (2) comprises a channel body (10) connected to the two first side plates (9); one end of the channel body (10) is provided with a second inlet (11) for the second heat exchange medium to flow in; the other end of the channel body (10) is provided with a second outlet (12) for the second heat exchange medium to flow out.

5. The gravity heat pipe heat exchanger according to claim 1, characterized in that: At least one gravity heat pipe (3) is arranged in each of the flow-conducting compartments (5).

6. The gravity heat pipe heat exchanger according to claim 4, characterized in that: The channel body (10) is in the shape of a rectangular parallelepiped.

7. The gravity heat pipe heat exchanger according to claim 2, characterized in that: The bottom height of the water tank (6) gradually decreases in the direction from the first inlet (7) to the first outlet (8).

8. The gravity heat pipe heat exchanger according to claim 4, characterized in that: The bottom height of the channel body gradually decreases in the direction from the second inlet (11) to the second outlet (12), and a condensed water outlet (21) is provided on a side close to the second outlet (12).

9. The gravity heat pipe heat exchanger according to any one of claims 1 to 8, characterized in that: A plurality of heat exchange fins (13) are sequentially arranged on the radial end surface of the portion of the gravity heat pipe (3) extending into the second channel (2).

10. The gravity heat pipe heat exchanger according to claim 9, characterized in that: The heat exchange fin (13) is annular.

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