Heat exchanger

Abstract

This application relates to the field of heat exchange technology, and more particularly to a heat exchange device comprising a water tank and a coil assembly. The water tank has multiple guide holes at its bottom. The coil assembly includes several vertically arranged heat exchange tubes, the upper ends of which pass through the guide holes, and there is a gap between the sidewall of the heat exchange tube and the wall of the guide hole. By arranging the heat exchange tubes vertically and allowing the upper ends of the tubes to pass through the guide holes at the bottom of the water tank, this application improves the problems of uneven humidification of heat exchange tubes and inconsistent water temperature of the spray water received by the heat exchange tubes in existing spray heat exchangers. During operation, water in the water tank flows out from the gap between the walls of the heat exchange tubes and the guide holes, and flows downwards along the tubes. This results in high water utilization efficiency, enabling humidification of each heat exchange tube and improving the problem of inconsistent water temperature of the spray water received by different heat exchange tubes.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to heat exchange devices. Background Technology

[0002] The strong promotion of national energy conservation and emission reduction policies necessitates the application of more liquid cooling, water cooling, and natural cooling projects. Currently, spray heat exchangers are a relatively common type of heat exchanger. In the process of developing this application, the inventors discovered at least the following problems in the prior art: The existing spray heat exchanger has a horizontal arrangement of coiled pipes. The following problems will occur when humidifying: (1) the pipes above block the pipes below, making it impossible to humidify all pipes evenly; (2) the water temperature of the spray water received by the pipes in the upper and lower directions is inconsistent. Utility Model Content

[0003] This application provides a heat exchange device designed to improve the problems of uneven humidification of coil pipes and inconsistent water temperature of spray water received by humidification coils in existing spray heat exchangers.

[0004] In a first aspect, embodiments of this application provide a heat exchange device, including: The water tank has multiple drainage holes at the bottom; The coil assembly includes several vertically arranged heat exchange tubes, the upper ends of which pass through the flow guide hole, and there is a gap between the side wall of the heat exchange tube and the wall of the flow guide hole.

[0005] In some embodiments, the plurality of heat exchange tubes include a plurality of first heat exchange tubes arranged at intervals along a first horizontal direction, and the heat exchange device further includes a first manifold and a second manifold, wherein the inlets of the plurality of first heat exchange tubes are all connected to the first manifold, and the outlets of the plurality of first heat exchange tubes are all connected to the second manifold.

[0006] In some embodiments, the plurality of heat exchange tubes further include a plurality of second heat exchange tubes arranged at intervals along the first horizontal direction. The heat exchange device further includes a third manifold and a fourth manifold. The inlet ends of the plurality of second heat exchange tubes are all connected to the third manifold, and the outlet ends of the plurality of second heat exchange tubes are all connected to the fourth manifold. The first manifold, the second manifold, the third manifold, and the fourth manifold are arranged in pairs on the upper and lower sides of the coil assembly.

[0007] In some embodiments, the first heat exchange tube and the second heat exchange tube are arranged alternately along the first horizontal direction.

[0008] In some embodiments, the heat exchange device further includes a water receiving tray disposed below the coil assembly, the water receiving tray having a support base, the first manifold and the second manifold being disposed below the coil assembly and supported by the support base, the inlet end of the first manifold and the outlet end of the second manifold extending from the side of the water receiving tray.

[0009] In some embodiments, the heat exchange tube is in a near-straight, near-U, or near-serpentine shape.

[0010] In some embodiments, the gap between the sidewall of the heat exchange tube and the wall of the flow guide hole is 0.5~3mm.

[0011] In some embodiments, the heat exchange device further includes a water receiving tray, which is disposed below the coil assembly and communicates with the water tank. A water pump is provided in the flow path between the water receiving tray and the water tank.

[0012] In some embodiments, a flow regulating valve is also provided in the flow path between the water receiving tray and the water tank.

[0013] In some embodiments, the water receiving tray is provided with a water inlet.

[0014] In some embodiments, the water receiving tray is also provided with an overflow port.

[0015] In some embodiments, a drain valve is provided at the lower end or bottom of the water receiving tray.

[0016] Compared with the prior art, the technical solution provided in this application has at least the following beneficial effects: This application improves the problems of uneven humidification and inconsistent spray water temperature in existing spray heat exchangers by vertically arranging the heat exchange tubes and having the upper end of the heat exchange tubes pass through the guide holes at the bottom of the water tank. Specifically, during operation, when spray water is injected into the water tank, the water in the tank can flow out from the gap between the heat exchange tubes and the walls of the heat conduction holes, and flow down the heat exchange tubes. This results in high water utilization efficiency and enables humidification of each heat exchange tube. Furthermore, since the vertically arranged heat exchange tubes are arranged horizontally rather than vertically, the problem of inconsistent spray water temperature received by different heat exchange tubes can be improved. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the heat exchange device of this application in one embodiment; Figure 2 for Figure 1The main view; Figure 3 for Figure 2 BB-direction sectional view; Figure 4 for Figure 1 Top view; Figure 5 for Figure 1 The left view; Figure 6 for Figure 1 The right view.

[0019] Figure label: Detailed Implementation To better understand the technical solution of this utility model, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should be understood that the term "and / or" used in this article 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, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0023] This application proposes a heat exchange device 100.

[0024] Please see Figures 1-6 In this embodiment of the application, the heat exchange device 100 includes a water tank 131 and a coil assembly 110; the bottom of the water tank 131 is provided with a plurality of flow guide holes; the coil assembly 110 includes a plurality of vertically arranged heat exchange tubes, the upper end of the heat exchange tubes passing through the flow guide holes, and there is a gap L between the side wall of the heat exchange tube and the hole wall of the flow guide hole.

[0025] In this embodiment of the application, specifically, the heat exchange device 100 includes a frame 130, a water tank 131 is formed on the top of the frame 130, and a coil assembly 110 is fixed on the frame 130.

[0026] In this embodiment of the application, the heat exchange tube may be in the shape of a straight line, a U-shape, a snake-like shape, etc.

[0027] In this embodiment, the plurality of heat exchange tubes may include not only multiple heat exchange tubes arranged horizontally, but also only a single heat exchange tube, for example, the plurality of heat exchange tubes may be a single serpentine heat exchange tube. Preferably, the plurality of heat exchange tubes includes multiple heat exchange tubes, which is beneficial for shortening the flow path of the refrigerant in the heat exchange tubes, thereby improving the heat exchange efficiency of the heat exchange device 100.

[0028] In this embodiment, the heat exchange device 100 has a natural cooling mode and a liquid cooling mode. In the natural cooling mode, there is no need to inject liquid water into the water tank 131. External cold air flows through the heat exchange device 100 and exchanges heat with the refrigerant in the heat exchange tubes. In the liquid cooling mode, the water tank 131 is filled with water, which flows down the wall of the heat exchange tubes through the guide holes. During this process, the liquid water on the tube wall exchanges heat with the refrigerant in the heat exchange tubes, and some of the liquid water absorbs heat and evaporates. The operator can switch the heat exchange device 100 to a suitable working mode according to different environmental conditions. In winter or regions with low ambient temperatures, the heat exchange device 100 can operate directly in a dry state (natural cooling mode) to make full use of natural cooling, thereby achieving the purpose of water saving and energy saving.

[0029] This application's technical solution improves the problems of uneven humidification of heat exchange tubes and inconsistent water temperature of spray water received by heat exchange tubes in existing spray heat exchangers by vertically arranging the heat exchange tubes and having the upper gap L of the heat exchange tubes pass through the guide hole at the bottom of the water tank 131. Specifically, during operation, when spray water is injected into the water tank 131, the water in the water tank 131 can flow out from the gap L between the heat exchange tube and the wall of the heat conduction hole, and flow from top to bottom along the heat exchange tube pipe. The water utilization efficiency is high, and it can achieve humidification of each heat exchange tube pipe. Furthermore, since the vertically arranged heat exchange tubes are arranged horizontally rather than vertically, the problem of inconsistent water temperature of spray water received by different heat exchange tubes can be improved.

[0030] In this embodiment, water in the water tank 131 flows out through the gap L between the heat exchange tube and the wall of the heat conduction hole. This gap L can be designed to be relatively small. The smaller the gap L, the slower the outflow rate of water in the water tank 131. This allows the water tank 131 to store only a small amount of liquid water, thus requiring a smaller size. Compared with traditional spray-type heat exchange devices 100 (such as cooling towers) that require a large water tank 131, the heat exchange device 100 of this application effectively reduces water consumption, improves water utilization, and reduces the size of the heat exchange device 100.

[0031] In this embodiment, the cross-sectional shape of the heat exchanger pipe can be circular, elliptical, polygonal, etc., and the shape of the guide holes can be the same as or different from the cross-sectional shape of the heat exchanger pipe. Preferably, the shape of the corresponding guide holes is the same as the cross-sectional shape of the heat exchanger pipe. This arrangement facilitates the formation of a uniform water film on the surface of the heat exchanger pipe during water-cooled heat exchange, thereby improving the heat exchange efficiency of the heat exchanger pipe. In some embodiments, the shape of each guide hole and the cross-sectional shape of each heat exchanger pipe are both circular.

[0032] In this embodiment, the gap L between the sidewall of the heat exchange tube and the wall of the flow guide hole can be adjusted according to the actual application scenario.

[0033] Please see Figure 1 In some embodiments, the gap L between the sidewall of the heat exchange tube and the wall of the guide hole is 0.5~3mm, specifically 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm or any value between them. Within this gap L range, a water film of sufficient thickness can be formed on the surface of the heat exchange tube, which can improve water utilization while ensuring heat exchange efficiency.

[0034] In this embodiment, the width of the gap L between each heat exchange tube and its corresponding guide hole wall can be the same or different. When the cross-sectional dimensions of each heat exchange tube are the same, the width of the gap L between each heat exchange tube and its corresponding guide hole wall is consistent. This arrangement helps to improve water utilization while ensuring heat exchange efficiency.

[0035] In this embodiment of the application, the heat exchange device 100 further includes a refrigerant manifold that communicates with the heat exchange tube. The refrigerant manifold is located on the upper and lower sides of the coil assembly 110, specifically on the upper side, lower side, or both sides of the coil assembly 110.

[0036] Please see Figure 1In some embodiments, the refrigerant manifold includes a first manifold 121 and a second manifold 122 extending along a first horizontal direction S1. The plurality of heat exchange tubes includes multiple first heat exchange tubes 111, which are arranged sequentially at intervals along the first horizontal direction S1. The inlets of all the first heat exchange tubes 111 are connected to the first manifold 121, and the outlets of all the first heat exchange tubes 111 are connected to the second manifold 122. The first manifold 121 and the second manifold 122 can be simultaneously disposed on the upper or lower side of the coil assembly 110, or they can be disposed on the upper and lower sides of the coil assembly 110 respectively. Preferably, the first manifold 121 and the second manifold 122 are arranged laterally side-by-side on the upper or lower side of the coil assembly 110; by placing the first manifold 121 and the second manifold 122 on the same side of the coil assembly 110, it is beneficial to reduce the height of the heat exchange device 100.

[0037] Please see Figure 2 and Figure 3 In some embodiments, the plurality of heat exchange tubes further include multiple second heat exchange tubes 112 extending along the first horizontal direction S1. The multiple second heat exchange tubes 112 are arranged at intervals along the first horizontal direction S1. The refrigerant manifold also includes a third manifold 123 and a fourth manifold 124. The inlet ends of the multiple second heat exchange tubes 112 are all connected to the third manifold 123, and the outlet ends of the multiple second heat exchange tubes 112 are all connected to the fourth manifold 124. The first manifold 121, the second manifold 122, the third manifold 123, and the fourth manifold 124 are arranged in pairs along the second horizontal direction S2 on the upper and lower sides of the coil assembly 110. The second horizontal direction S2 is perpendicular to the first horizontal direction S1, and the second horizontal direction S2 is the air inlet and outlet direction of the heat exchange device 100. In this embodiment, the first manifold 121 can be arranged side-by-side with any one of the second manifold 122, the third manifold 123, and the fourth manifold 124 on the upper (or lower) side of the coil assembly 110, while the other two of the second manifold 122, the third manifold 123, and the fourth manifold 124 are arranged side-by-side on the lower (or upper) side of the coil assembly 110. In this embodiment, the cooling circuits connected to the outlet ends of the second manifold 122 and the fourth manifold 124 can be the same or different. During the heat exchange process, the first heat exchange tube assembly 111 and the second heat exchange tube assembly 112 can selectively participate in heat exchange, thus making the working mode of the heat exchange device 100 more possible.

[0038] In the above embodiment, the first heat exchange tube 111 and the second heat exchange tube 112 are staggered along the first horizontal direction S1. This arrangement helps to reduce the temperature difference of the cold air flowing through the first heat exchange tube 111 and the second heat exchange tube 112, improves the heat exchange uniformity of the first heat exchange tube 111 assembly and the second heat exchange tube 112 assembly, and thus helps to improve the overall heat exchange efficiency of the heat exchange device 100.

[0039] The embodiments of this application will be described in more detail below, taking the example of the first manifold 121 and the second manifold 122 being located below the coil assembly 110, and the third manifold 123 and the fourth manifold 124 being located above the coil assembly 110.

[0040] In some embodiments, the heat exchange device 100 further includes a water receiving tray 133, which is disposed below the coil assembly 110 and is used to receive unevaporated liquid water flowing down from the surface of the heat exchange tubes. In this embodiment, the liquid water received by the water receiving tray 133 can be re-injected into the water tank 131 and flow down along the wall of the heat exchange tubes again. Compared with traditional spray-type dry coolers, the heat exchange device 100 of this application realizes water recycling, achieves the purpose of water saving and energy saving, and effectively solves the problem of nozzle clogging.

[0041] Please see Figure 6 In the above embodiment, the water receiving tray 133 is formed at the lower end of the frame 130. The water receiving tray 133 is provided with a support seat (not shown in the figure). The first manifold 121 and the second manifold 122 are supported by the support seat. Along the first horizontal direction S1, an opening 133a is provided on one side of the water receiving tray 133. The inlet end of the first manifold 121 and the outlet end of the second manifold 122 extend from the opening 133a to the outside of the water receiving tray 133.

[0042] Please see Figure 5 and Figure 6 In the above embodiment, the water receiving tray 133 and the water tank 131 are connected, and a water pump 141 is provided in the flow path between the water receiving tray 133 and the water tank 131. The water pump 141 is used to guide the water in the water receiving tray 133 into the water tank 131 for reuse. Specifically, the water receiving tray 133 and the water tank 131 are connected by a connecting pipe 143, and the water pump 141 is provided in the flow path of the connecting pipe 143.

[0043] In some embodiments, a water pump 141 is installed on the flow channel at the lower end of a connecting pipe 143. The upper end of the connecting pipe 143 is provided with multiple branch pipes, each of which is provided with a spray nozzle facing the water tank 131. The liquid in the water receiving tray 133 is driven by the water pump 141 and sprayed into the water tank 131 through the spray nozzle.

[0044] Please see Figure 1 and Figure 6 In some embodiments, the frame 130 further includes two support legs 138, which are respectively located below the two ends of the water receiving tray 133 in the length direction (first horizontal direction S1). The support legs 138 are provided with mounting positions, and the water pump 141 is located at the mounting positions.

[0045] Please see Figure 4In some embodiments, a flow regulating valve 145 is also provided in the flow path between the water receiving tray 133 and the water tank 131. The flow regulating valve 145 can be used to regulate the flow rate of the spray water injected from the connecting pipe 143 into the water tank 131.

[0046] In the above embodiments, the flow regulating valve 145 can be installed on the main flow channel of the connecting pipe 143 or on the branch flow channel at the upper end of the connecting pipe 143. In one specific embodiment, there are multiple flow regulating valves 145, with one flow regulating valve 145 installed on the flow channel of each branch pipe. This arrangement allows for individual control of the spray water flow rate of each branch pipe, which is more conducive to adjusting the heat exchange uniformity of each coil assembly 110.

[0047] As the water in the water tank 131 continues to evaporate, the amount of recyclable water decreases. In this case, it is necessary to replenish the liquid water in the water circulation channel using an external water source. Specifically, the water can be replenished into the water tank 131 or into the water receiving tray 133. Since the heat exchange tubes in this application are vertically installed and the water tank 131 is located at a high position, it is not convenient to inject liquid water.

[0048] Therefore, in some embodiments, the water receiving tray 133 is provided with a water inlet 133b. An external water source can inject water into the water receiving tray 133 through the water inlet 133b, so that the heat exchange device 100 can continuously exchange heat for a long time.

[0049] In the above embodiment, the water inlet 133b is located at the upper end of the side wall of the water receiving tray 133. This arrangement enables the water receiving tray 133 to receive or store as much liquid water as possible, or to reduce the water injection resistance.

[0050] In the above embodiment, the water inlet 133b and the opening 133a are respectively arranged on opposite sides of the water receiving tray 133, and the water inlet 133b is arranged at a height higher than the opening 133a.

[0051] Please see Figure 5 In the above embodiment, a valve 137 may be provided at the water inlet 133b, through which the opening or closing of the water inlet 133b can be controlled.

[0052] Please see Figure 5 In some embodiments, the water receiving tray 133 is also provided with an overflow port 133c. The overflow port 133c can effectively prevent the water receiving tray 133 from being filled with too much water and the water from overflowing from the periphery of the water receiving tray 133.

[0053] In the above embodiments, the overflow port 133c can be set on the side where the opening 133a of the water receiving pan 133 is located or on the side where the water inlet 133b is located. The arrangement height of the overflow port 133c is lower than the height of the opening 133a. The specific arrangement height can be adjusted according to the water receiving volume or water storage volume requirements of the water receiving pan 133.

[0054] In the above embodiment, the overflow port 133c is provided with a guide pipe 136, through which the liquid overflowing from the overflow port 133c can be guided to a preset area.

[0055] Please continue reading. Figure 5 In some embodiments, a drain valve 135 is provided at the lower end or bottom of the water receiving tray 133. When the water receiving tray 133 needs to be drained and cleaned, the drain valve 135 can be opened to drain the water in the water receiving tray 133 and clean it.

[0056] The above are merely preferred embodiments of the present utility model and are 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 scope of protection of the present utility model.

Claims

1. A heat exchange device, characterized in that, include: The water tank has multiple drainage holes at the bottom; The coil assembly includes several vertically arranged heat exchange tubes, the upper ends of which pass through the flow guide hole, and there is a gap between the side wall of the heat exchange tube and the wall of the flow guide hole.

2. The heat exchange device as described in claim 1, characterized in that, The heat exchange tubes include multiple first heat exchange tubes arranged at intervals along a first horizontal direction. The heat exchange device also includes a first manifold and a second manifold. The inlets of the multiple first heat exchange tubes are all connected to the first manifold, and the outlets of the multiple first heat exchange tubes are all connected to the second manifold.

3. The heat exchange device as described in claim 2, characterized in that, The heat exchange tubes also include multiple second heat exchange tubes arranged at intervals along the first horizontal direction. The heat exchange device also includes a third manifold and a fourth manifold. The inlet ends of the multiple second heat exchange tubes are all connected to the third manifold, and the outlet ends of the multiple second heat exchange tubes are all connected to the fourth manifold. The first manifold, the second manifold, the third manifold, and the fourth manifold are arranged in pairs on the upper and lower sides of the coil assembly.

4. The heat exchange device as described in claim 3, characterized in that, Along the first horizontal direction, the first heat exchange tube and the second heat exchange tube are arranged alternately.

5. The heat exchange device as described in claim 2, characterized in that, The heat exchange device further includes a water receiving tray, which is located below the coil assembly. The water receiving tray has a support base, and the first manifold and the second manifold are located below the coil assembly and supported by the support base. The inlet end of the first manifold and the outlet end of the second manifold extend from the side of the water receiving tray.

6. The heat exchange device as described in claim 1, characterized in that, The heat exchange tube is in the form of a straight line, a U-shape, or a snake shape.

7. The heat exchange device as described in claim 1, characterized in that, The gap between the sidewall of the heat exchange tube and the wall of the flow guide hole is 0.5~3mm.

8. The heat exchange device according to any one of claims 1-7, characterized in that, The heat exchange device also includes a water receiving tray, which is located below the coil assembly. The water receiving tray is connected to the water tank, and a water pump is provided in the flow path between the water receiving tray and the water tank.

9. The heat exchange device as described in claim 8, characterized in that, A flow regulating valve is also provided in the flow path between the water receiving tray and the water tank.

10. The heat exchange device as described in claim 8, characterized in that, The water receiving tray is provided with a water inlet; and / or, The water receiving tray is also provided with an overflow outlet; and / or; A drain valve is provided at the lower end or bottom of the water receiving tray.

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