Multilayer heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and discloses a multi-layer heat exchanger. The multi-layer heat exchanger comprises a plurality of heat exchanger bodies which are sequentially overlapped in the vertical direction, and the heat exchange efficiency is high. Each heat exchanger body comprises a water outlet collecting pipe, a main water outlet pipe and a gas communicating element. The water outlet collecting pipe is vertically arranged, one end of the main water outlet pipe is communicated with the water outlet collecting pipe, and the distance between the main water outlet pipe and the top of the water outlet collecting pipe meets a set value. An exhaust valve is arranged on the main water outlet pipe, the gas communication element is located in the water outlet collecting pipe and the main water outlet pipe, one end of the gas communication element is located on the inner top of the water outlet collecting pipe and communicated with the water outlet collecting pipe, and the other end of the gas communication element is communicated with the exhaust valve. The multi-layer heat exchanger is high in heat exchange efficiency.

Description

Technical Field

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

[0002] A heat exchanger (also known as a heat exchange device or heat exchanger) is a device used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements. It is an industrial application of convective heat transfer and heat conduction. Generally, such as Figure 1 As shown, the heat exchanger includes a main inlet pipe 220', an inlet manifold 120', a radiating coil 500', an outlet manifold 110', and a main outlet pipe 210' connected in sequence. The heat exchanger housing is placed vertically. The inlet manifold 120' and the outlet manifold 110' are spaced apart and arranged vertically in parallel on one side of the heat exchanger housing. The main inlet pipe 220' is located at the bottom of the inlet manifold 120', and the main outlet pipe 210' is located at the top of the outlet manifold 110'. An air vent valve 300' is installed on the main outlet pipe 210'. To improve working efficiency, multiple heat exchangers are often stacked together, typically a double-layer heat exchanger. In actual installation, when the two heat exchangers are stacked together, the main outlet pipe 210' of the lower heat exchanger and the main inlet pipe 220' of the upper heat exchanger are very close together, making it very inconvenient and difficult to operate the pipes during installation. Therefore, the main outlet pipe 210' of the heat exchanger is usually adjusted downwards to increase the distance between the main inlet pipe 220' of the upper heat exchanger and the main outlet pipe 210' of the lower heat exchanger, facilitating installation. However, this installation method causes the gas inside the heat exchanger to concentrate at the top of the outlet manifold 110'. If the traditional venting method is used, the pressure difference increases due to the change in height, making it difficult for the gas to escape, and the accumulated gas volume inside also increases, affecting the performance of the heat exchanger.

[0003] Therefore, there is an urgent need to develop a multilayer heat exchanger to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer heat exchanger with high heat exchange efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A multi-layer heat exchanger includes multiple heat exchanger bodies, which are stacked sequentially along a vertical direction. Each heat exchanger body includes:

[0007] A water outlet manifold, wherein the water outlet manifold is vertically installed;

[0008] A main water outlet pipe, one end of which is connected to the water outlet collection pipe, and the vertical distance between the top of the main water outlet pipe and the top of the water outlet collection pipe meets a set value. An air vent valve is provided on the main water outlet pipe.

[0009] A gas communication element is located inside the water outlet manifold and the main water outlet pipe. One end of the gas communication element is located at the top of the water outlet manifold and is connected to the water outlet manifold. The other end of the gas communication element is connected to the vent valve.

[0010] As an optional technical solution for a multi-layer heat exchanger, the gas communication element includes an exhaust pipe, one end of which extends into the top of the water outlet manifold, and the other end of which is connected to the exhaust valve.

[0011] As an optional technical solution for multi-layer heat exchangers, the set value is not less than 20 cm.

[0012] As an optional technical solution for multi-layer heat exchangers, the main outlet pipe is vertically connected to the outlet manifold.

[0013] As an optional technical solution for a multi-layer heat exchanger, the heat exchanger body also includes a main inlet pipe, an inlet manifold, and coils. The inlet manifold and the outlet manifold are spaced apart and arranged vertically in parallel. One end of the main inlet pipe is connected to the inlet manifold near its bottom. The coils are arranged in layers and their two ends are connected to the bottom of the inlet manifold and the top of the outlet manifold, respectively.

[0014] As an optional technical solution for multi-layer heat exchangers, the main water inlet pipe is vertically connected to the water inlet manifold.

[0015] As an optional technical solution for multi-layer heat exchangers, the heat exchanger body also includes heat dissipation fins, which are evenly distributed on the coil.

[0016] As an optional technical solution for a multi-layer heat exchanger, the heat exchanger body also includes multiple inlet water distribution pipes and multiple outlet water distribution pipes. The inlet water distribution pipes are respectively connected to the inlet water collection pipe and the coil, and the outlet water distribution pipes are respectively connected to the coil and the outlet water collection pipe.

[0017] As an optional technical solution for a multi-layer heat exchanger, the multi-layer heat exchanger further includes a partition plate located between two adjacent heat exchanger bodies. Each heat exchanger body is provided with an end plate at both ends along a first direction, and the inlet manifold, the coil, and the outlet manifold all pass through the end plate on the corresponding side.

[0018] As an optional technical solution for a multi-layer heat exchanger, the heat exchanger body is further provided with box plates at both ends along the second direction. The box plates and the end plates are sequentially and alternately connected around the coil. The second direction is perpendicular to the first direction.

[0019] The beneficial effects of this utility model are:

[0020] The multi-layer heat exchanger provided in this embodiment includes multiple heat exchanger bodies stacked vertically, resulting in high heat exchange efficiency. Each heat exchanger body includes an outlet water manifold, a main outlet water pipe, and a gas communication element. One end of the main outlet water pipe is connected to the outlet water manifold, which collects the water to be discharged during heat exchange for easy flow out from the main outlet water pipe. The vertical distance between the top of the main outlet water pipe and the top of the outlet water manifold meets a set value, preventing the main outlet water pipe of the upper heat exchanger body from being too close to the main inlet water pipe of the lower heat exchanger body, which could affect the operator's connection operations. An exhaust valve is provided on the main outlet water pipe. One end of the gas communication element is located at the top of the outlet water manifold and connected to it, while the other end is connected to the exhaust valve, facilitating the discharge of gas located at the top of the outlet water manifold, improving the heat exchange efficiency of the heat exchanger body, and thus enhancing the heat exchange efficiency of the multi-layer heat exchanger. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a double-layer heat exchanger in the background technology;

[0022] Figure 2 This is a first structural schematic diagram of the multilayer heat exchanger provided in this embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the second structure of the multilayer heat exchanger provided in this embodiment of the present invention;

[0024] Figure 4 yes Figure 3 Enlarged view at point A;

[0025] Figure 5 This is a schematic diagram of the third structure of the multilayer heat exchanger provided in this embodiment of the utility model;

[0026] Figure 6 yes Figure 5 Enlarged view at point B.

[0027] In the picture:

[0028] 110' Outlet manifold; 120' Inlet manifold; 210' Main outlet pipe; 220' Main inlet pipe; 300' Air vent valve; 500' Coil;

[0029] 110. Outlet manifold; 120. Inlet manifold; 210. Main outlet pipe; 220. Main inlet pipe; 300. Air vent valve; 400. Gas connection element; 500. Coil; 610. Outlet branch pipe; 620. Inlet branch pipe; 700. Partition plate; 800. Box plate; 900. End plate. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] The multi-layer heat exchanger provided in this embodiment has high heat exchange efficiency.

[0035] Specifically, such as Figures 2 to 6As shown, the multi-layer heat exchanger includes multiple heat exchanger bodies, which are stacked vertically in sequence. Each heat exchanger body includes an outlet water manifold 110, a main outlet water pipe 210, and a gas communication element 400. The outlet water manifold 110 is vertically arranged, and one end of the main outlet water pipe 210 is connected to the outlet water manifold 110, with the vertical distance between the top of the main outlet water pipe 210 and the top of the outlet water manifold 110 meeting a set value. An air vent valve 300 is provided on the main outlet water pipe 210. The gas communication element 400 is located inside the outlet water manifold 110 and the main outlet water pipe 210, with one end of the gas communication element 400 located at the top of the outlet water manifold 110 and connected to it, and the other end of the gas communication element 400 connected to the air vent valve 300.

[0036] Based on the above design, one end of the main outlet pipe 210 is connected to the outlet manifold 110, which collects the water to be discharged from the heat exchanger for easy flow out from the main outlet pipe 210. The vertical distance between the top of the main outlet pipe 210 and the top of the outlet manifold 110 meets the set value, so that when multiple heat exchanger bodies are stacked, the main outlet pipe 210 of the upper heat exchanger body and the main inlet pipe 220 of the lower heat exchanger body are not too close, which would affect the operator's connection operation. The main outlet pipe 210 is equipped with an exhaust valve 300. One end of the gas communication element 400 is located inside the top of the outlet manifold 110 and is connected to the outlet manifold 110. The other end of the gas communication element 400 is connected to the exhaust valve 300, which can facilitate the discharge of gas located at the top of the outlet manifold 110, improve the heat exchange efficiency of the heat exchanger body, and thus improve the heat exchange efficiency of the multi-layer heat exchanger.

[0037] In this embodiment, continue as follows Figure 3 and Figure 4 As shown, the gas communication element 400 includes an exhaust pipe, one end of which extends into the top of the water outlet manifold 110, and the other end of which is connected to the exhaust valve 300. The exhaust pipe has a simple structure and low cost.

[0038] Considering the angle from which the operator's hand enters and exits, the set value should not be less than 20 cm. For example, it can be 20 cm, 22 cm, 25 cm, 26 cm, or 30 cm, etc.

[0039] Optionally, the number of heat exchanger bodies in a multi-layer heat exchanger can be two, three, four, or five, etc.

[0040] In this embodiment, there are two heat exchanger bodies.

[0041] Optionally, the main outlet pipe 210 is vertically connected to the outlet manifold 110, which facilitates installation and allows the water after heat exchange to flow from the outlet manifold 110 to the main outlet pipe 210 for discharge.

[0042] Furthermore, the heat exchanger body also includes a main inlet pipe 220, an inlet manifold 120, and a coil 500. The inlet manifold 120 and the outlet manifold 110 are spaced apart and arranged vertically in parallel. One end of the main inlet pipe 220 is connected to the bottom of the inlet manifold 120. The coil 500 is coiled in layers, with both ends connected to the bottom of the inlet manifold 120 and the top of the outlet manifold 110, respectively. The connection between one end of the main inlet pipe 220 and the bottom of the inlet manifold 120 prevents the water collected in the inlet manifold 120 from flowing into the coil 500 too quickly, which would affect the heat exchange efficiency. In this embodiment, the main inlet pipe 220 is vertically connected to the inlet manifold 120, which facilitates installation and allows the water requiring heat exchange to flow from the main inlet pipe 220 to the inlet manifold 120 for discharge.

[0043] To increase the heat exchange efficiency of the multi-layer heat exchanger, the heat exchanger body also includes heat dissipation fins, which are evenly distributed on the coil 500.

[0044] In this embodiment, the heat exchanger body also includes multiple inlet water distribution pipes 620 and multiple outlet water distribution pipes 610. The inlet water distribution pipes 620 are respectively connected to the inlet water collection pipe 120 and the coil 500, and the outlet water distribution pipes 610 are respectively connected to the coil 500 and the outlet water collection pipe 110.

[0045] Optionally, the multi-layer heat exchanger also includes a partition 700, which is located between two adjacent heat exchanger bodies to separate and support the heat exchanger bodies. Each end of the heat exchanger body is provided with an end plate 900 along the first direction (x direction in the figure). The inlet manifold 120, the coil 500, and the outlet manifold 110 all pass through the end plate 900 on the corresponding side to protect the coil 500.

[0046] Furthermore, the heat exchanger body is provided with box plates 800 at both ends along the second direction (y direction in the figure). The box plates 800 and end plates 900 are connected in an alternating manner to surround the coil 500 and protect the coil 500.

[0047] It should be noted that the second direction is perpendicular to the first direction.

[0048] In this embodiment, the box panel 800 is made of aluminum foil.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A multi-pass heat exchanger, characterized by, The heat exchanger comprises a plurality of heat exchanger bodies arranged in a vertical direction, each of the heat exchanger bodies comprising: a water outlet header (110) arranged vertically; a total water outlet pipe (210) in communication with the water outlet header (110) at one end, and the vertical distance between the total water outlet pipe (210) and the top of the water outlet header (110) meets a set value, and the total water outlet pipe (210) is provided with an exhaust valve (300); a gas communication element (400) located in the water outlet header (110) and the total water outlet pipe (210), one end of the gas communication element (400) is located in the top of the water outlet header (110) and in communication with the water outlet header (110), and the other end of the gas communication element (400) is in communication with the exhaust valve (300).

2. The multi-layer heat exchanger of claim 1, wherein, The gas communication element (400) comprises an exhaust pipe, one end of the exhaust pipe extends into the top of the water outlet header (110), and the other end of the exhaust pipe is in communication with the exhaust valve (300).

3. The multi-layer heat exchanger of claim 1, wherein, The set value is not less than 20 cmm.

4. The multi-layer heat exchanger of claim 1, wherein, The total water outlet pipe (210) is connected vertically to the water outlet header (110).

5. The multi-layer heat exchanger of claim 1, wherein, The heat exchanger body further comprises a total water inlet pipe (220), a water inlet header (120) and a coil pipe (500), the water inlet header (120) is arranged vertically and spaced apart from the water outlet header (110), one end of the total water inlet pipe (220) is in communication with the water inlet header (120) near the bottom, and the coil pipe (500) is arranged in layers and both ends are in communication with the bottom of the water inlet header (120) and the top of the water outlet header (110) respectively.

6. The multi-layer heat exchanger of claim 5, wherein, The total water inlet pipe (220) is connected vertically to the water inlet header (120).

7. The multi-layer heat exchanger of claim 5, wherein, The heat exchanger body further comprises a plurality of water inlet branch pipes (620) and a plurality of water outlet branch pipes (610), the water inlet branch pipes (620) are connected to the water inlet header (120) and the coil pipe (500) respectively, and the water outlet branch pipes (610) are connected to the coil pipe (500) and the water outlet header (110) respectively.

8. The multi-layer heat exchanger of claim 5, wherein, The multi-layer heat exchanger further comprises a partition plate (700) located between two adjacent heat exchanger bodies, and the heat exchanger body is provided with an end plate (900) at both ends in a first direction, and the water inlet header (120), the coil pipe (500) and the water outlet header (110) are arranged through the end plate (900) on the corresponding side.

9. The multi-layer heat exchanger of claim 5, wherein, The heat exchanger body is further provided with a box plate (800) at both ends in a second direction, and the box plate (800) and the end plate (900) are connected in turn and staggered to surround the coil pipe (500), and the second direction is perpendicular to the first direction.

10. The multi-layer heat exchanger of claim 9, wherein, ​

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