Sewage heat exchanger for hot water unit

Abstract

The utility model discloses a sewage heat exchanger for a hot water unit, which relates to the technical field of heat exchangers, aims to solve the problems of heat exchangers, and comprises a plurality of groups of heat exchange modules which are arranged in parallel, and the plurality of groups of heat exchange modules are jointly connected with an output pipe and an input pipe. Each group of heat exchange modules comprises a plurality of groups of heat exchange mechanisms, each heat exchange mechanism comprises a separation connector, a straight-through connector and a heat exchange assembly, the separation connectors and the straight-through connectors are both provided with connecting plugs, and the two ends of each heat exchange assembly are both connected with the connecting plugs on the separation connectors and the straight-through connectors in an inserted mode. The outer side of the connecting plug is further coaxially sleeved with a limiting cylinder so as to wrap a connecting point between the heat exchange assembly and the connecting plug.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and particularly relates to a sewage heat exchanger for a hot water unit. Background Art

[0002] The effective utilization of energy has attracted increasing attention. The heat recovery hot water unit is a device that recovers the waste heat of bathing water or domestic sewage according to the heat pump principle, and is a device that efficiently produces hot water driven by a small amount of electric energy. This kind of device needs to be used in cooperation with a sewage heat exchanger. Since such sewage contains a large amount of organic grease, and the flow rate is extremely unstable, and coupled with many factors such as large temperature fluctuations, it has led to difficult problems in the research and development of the cooperative heat exchanger.

[0003] In order to avoid dirt blockage and corrosion of the inner pipe, the existing heat exchangers are generally made of non-metallic materials. Since most of the structures are non-standard parts, the connections between the plates and components generally use PE hot melting or special glue. According to the usage conditions, the immersion layout is usually adopted. However, the effect of using glue is greatly affected by temperature and technique. The adhesive is extremely easy to age in sewage with large temperature fluctuations for a long time. When grease contacts the PE material, a reaction will occur, decomposing a large amount of ethylene components, polluting the environment. At the same time, using glue or PE hot melting is usually a fixed connection. Once the connection is completed, it can only be disassembled by a destructive method, which will undoubtedly increase unnecessary costs and difficulties for maintenance and repair.

[0004] The joints of the existing heat exchangers are directly exposed to the water flow. Since the impact force of the sewage flow rate change is not fixed, continuous stress will be generated on the weak points under long-term scouring, resulting in the disconnection of the connection points. Some passage connection points on the plates will be deformed under the long-term stress impact of the water flow, affecting the operation of the entire heat exchanger. Content of the Utility Model

[0005] To solve the above problems, that is, the problem that the connection between the plates and components of the heat exchanger using PE hot melting or glue is not convenient for maintenance and is easily affected by the water flow stress, the utility model provides a sewage heat exchanger for a hot water unit, which includes multiple groups of heat exchange modules arranged in parallel. Multiple groups of the heat exchange modules are commonly connected with an output pipe and an input pipe. Each group of the heat exchange modules includes multiple groups of heat exchange mechanisms. The heat exchange mechanism includes a partition connection head, a straight-through connection head, and a heat exchange component. Plug connectors are arranged on both the partition connection head and the straight-through connection head. Both ends of the heat exchange component are inserted into the plug connectors on the partition connection head and the straight-through connection head. A limiting cylinder is coaxially sleeved outside the plug connector to wrap the insertion point between the heat exchange component and the plug connector.

[0006] A further setting of the present utility model is that: eight plug connectors are provided on both the partition connector and the straight-through connector, the heat exchange assembly includes eight heat exchange tubes, and both ends of the heat exchange tubes are respectively inserted into the corresponding plug connectors on the partition connector and the straight-through connector; a partition is provided inside the partition connector, the partition is arranged at the middle position of the partition connector, and four plug connectors are respectively arranged on both sides of the partition.

[0007] A further setting of the present utility model is that: a raised tenon is provided on the outer wall of the plug connector.

[0008] A further setting of the present utility model is that: two raised tenons are provided, and the two raised tenons are arranged vertically.

[0009] A further setting of the present utility model is that: the partition connectors of multiple groups of the heat exchange mechanisms are connected in series, adjacent two partition connectors are connected by a connecting piece, and both ends of the multiple partition connectors connected in series are respectively communicated with the output pipe and the input pipe.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. By inserting the heat exchange tube into the plug connector, the detachable connection between the heat exchange tube and the plug connector can be realized, thereby replacing the existing PE hot melt connection or gluing. Further, it can avoid the decomposition of environmental pollutants caused by the contact between the PE material and grease. At the same time, the detachable connection can also make the later maintenance of the device simpler and more convenient.

[0012] 2. By providing the limiting cylinder, it can prevent the heat exchange tube and the plug connector from being directly exposed under the water flow, further avoiding the damage to the insertion point of the heat exchange tube and the plug connector caused by the impact of the water flow, and avoiding the deformation of the plug connector, which affects the heat exchange work. Description of the Drawings

[0013] Figure 1 Shows the structural schematic diagram of the present utility model.

[0014] Figure 2 Shows the structural schematic diagram of the heat exchange module.

[0015] Figure 3 Shows the structural schematic diagram of the heat exchange mechanism.

[0016] Figure 4 Shows the structural schematic diagram of the partition connector.

[0017] Figure 5 Shows the cross-sectional view of the partition connector.

[0018] Figure 6 Shows the cross-sectional view of the straight-through connector.

[0019] Reference numerals: 1, heat exchange module; 11, partition connector; 111, partition plate; 12, straight-through connector; 13, heat exchange tube; 14, connecting piece; 2, output pipe; 3, input pipe; 4, socket; 41, raised tenon; 5, limiting cylinder. Detailed implementation manners

[0020] The preferred implementation manners of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0021] The present utility model provides a sewage heat exchanger for a hot water unit, which includes three groups of heat exchange modules 1 arranged in parallel. The output end of the heat exchange module 1 is communicated with an output pipe 2, and the input end of the heat exchange module 1 is communicated with an input pipe 3. Sewage is input into the heat exchange module 1 through the input pipe 3 and is output through the output pipe 2 after heat exchange through the heat exchange module 1.

[0022] The heat exchange module 1 includes three groups of heat exchange mechanisms arranged in series. The heat exchange mechanism includes a partition connector 11, a straight-through connector 12 and a heat exchange component. Eight sockets 4 are evenly arranged on the partition connector 11, and the socket 4 is welded to the partition connector 11. Eight sockets 4 are also evenly arranged on the straight-through connector 12, and the socket 4 is also welded to the straight-through connector 12.

[0023] The heat exchange component includes eight heat exchange tubes 13. The two ends of the heat exchange tube 13 are respectively inserted into the sockets 4 on the partition connector 11 and the straight-through connector 12, and the eight heat exchange tubes 13 are respectively arranged corresponding to the eight sockets 4 on the partition connector 11 and the straight-through connector 12.

[0024] By inserting and connecting the heat exchange tube 13 with the socket 4, the detachable connection between the heat exchange tube 13 and the socket 4 can be realized, thereby making the connection between the heat exchange tube 13 and the socket 4 simpler and more convenient, and making the maintenance and repair of the later equipment more convenient.

[0025] Eight limiting cylinders 5 are respectively welded on the partition connector 11 and the straight-through connector 12. The eight limiting cylinders 5 are arranged corresponding to the eight sockets 4, and the limiting cylinder 5 is coaxially sleeved on the socket 4. Therefore, when connecting the heat exchange tube 13 with the socket 4, one end of the heat exchange tube 13 needs to be inserted into the limiting cylinder 5 and then inserted into the socket 4 in the limiting cylinder 5.

[0026] It should be noted that the heat exchange tube 13 is connected to the limiting cylinder 5 by interference fit, which can further fix the heat exchange tube 13 by the limiting cylinder 5 to ensure the stability of the heat exchange tube 13. At the same time, the limiting tube can also protect the insertion point between the heat exchange tube and the plug connector 4, preventing the insertion point from being exposed to the water flow and avoiding the impact of the sewage water flow on the insertion point.

[0027] A partition 111 is welded inside the partition connector 11 to divide the partition connector 11 into two independent cavities. The partition 111 is arranged in the middle of the partition connector 11, that is, four plug connectors 4 are respectively arranged on both sides of the partition 111. Refer to Figure 2 , sewage is input from one end of the partition connector 11 and flows into the straight-through connector 12 through the four heat exchange tubes 13. Both ends of the straight-through connector 12 are closed. In this way, the water flow will flow into the other four heat exchange tubes 13 and flow into the other cavity of the partition connector 11 through the heat exchange tubes 13, and is output from the partition connector 11 through this cavity.

[0028] The three partition connectors 11 in the same heat exchange module 1 are connected in series, and the connection positions are connected by the connecting piece 14 to enable the partition connectors 11 to be detachably connected. Then, when the three heat exchange mechanisms are deviated during installation, the three groups of heat exchange mechanisms can be adjusted to the same horizontal plane by loosening the connecting piece 14 to ensure the stable heat exchange of the heat exchanger.

[0029] A convex tenon 41 is integrally arranged on the outer wall of the plug connector 4. Two convex tenons 41 are arranged on each plug connector 4, and the two convex tenons 41 are arranged vertically. When the heat exchange tube 13 is inserted into the plug connector 4, the convex tenon 41 can play a tightening role, making the insertion of the heat exchange tube 13 and the plug connector 4 more stable.

[0030] During operation, sewage is transported into the three groups of heat exchange modules 1 by the input pipe 3. In the heat exchange module 1, first, it is input into four heat exchange tubes 13 of one of the heat exchange mechanisms from the input end of a partition connector 11 connected to the input pipe 3, and then flows into the other four heat exchange tubes 13 through the corresponding straight-through connector 12. Then, it is transported into the next heat exchange mechanism through the partition connecting pipe, and so on, until it is transported into the output pipe 2 and output by the output pipe 2.

[0031] In summary, the detachable connection between the heat exchange tube 13 and the socket 4 can be achieved by inserting the heat exchange tube 13 into the socket 4 in the present utility model, thereby replacing the existing PE hot melt connection or gluing. Further, it can avoid the decomposition of environmental pollutants due to the contact between the PE material and grease. At the same time, the detachable connection can make the later maintenance of the device simpler and more convenient. By providing the limiting cylinder 5, it can prevent the heat exchange tube 13 and the socket 4 from being directly exposed to the water flow, further avoiding the damage to the insertion point of the heat exchange tube 13 and the socket 4 caused by the impact of the water flow, and preventing the deformation of the socket 4 from affecting the heat exchange work.

[0032] Although the present utility model has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0033] In the description of the present utility model, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] In addition, it should be noted that in the description of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles, or devices / equipment.

[0036] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.

Claims

1. A sewage heat exchanger for a hot water unit, characterized in that: The invention comprises a plurality of groups of heat exchange modules (1) arranged in parallel, wherein the plurality of groups of heat exchange modules (1) are commonly connected to an output pipe (2) and an input pipe (3), and each group of heat exchange modules (1) comprises a plurality of groups of heat exchange mechanisms, wherein the heat exchange mechanisms comprise a separation connector (11), a straight connector (12) and a heat exchange component, wherein the separation connector (11) and the straight connector (12) are both provided with plug connectors (4), and both ends of the heat exchange component are plugged into the plug connectors (4) on the separation connector (11) and the straight connector (12), and a limiting cylinder (5) is coaxially sleeved on the outer side of the plug connector (4) to wrap the plug connection point between the heat exchange component and the plug connector (4).

2. The sewage heat exchanger for a hot water unit according to claim 1, characterized in that: The partition connector (11) and the straight connector (12) are both provided with eight plug connectors (4); the heat exchange assembly comprises eight heat exchange tubes (13); both ends of the heat exchange tubes (13) are respectively plugged into corresponding plug connectors (4) on the partition connector (11) and the straight connector (12); a partition (111) is provided inside the partition connector (11); the partition (111) is provided in the middle of the partition connector (11); and four plug connectors (4) are respectively provided on both sides of the partition (111).

3. The sewage heat exchanger for a hot water unit according to claim 1, characterized in that: A protruding tenon (41) is provided on the outer wall of the plug connector (4).

4. The sewage heat exchanger for a hot water unit according to claim 3, characterized in that: Two protruding tenons (41) are provided, and the two protruding tenons (41) are arranged up and down.

5. The sewage heat exchanger for a hot water unit according to claim 1, characterized in that: The plurality of groups of the separation connectors (11) of the heat exchange mechanism are connected in series, two adjacent separation connectors (11) are connected via a connector (14), and both ends of the plurality of separation connectors (11) connected in series are respectively connected to the output pipe (2) and the input pipe (3).

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