Lightweight, high heat transfer internal and external coil heat exchangers

Abstract

This utility model provides a lightweight, high-heat-exchange-capacity internal and external coil heat exchanger, relating to the field of heat exchanger technology. It addresses the problem that the contact distance between the inner side of the flow channel and the exhaust gas is the greatest, and the outer side of the flow channel obstructs the contact, making it difficult to fully contact and exchange heat with the high-temperature exhaust gas. This results in poor overall heat exchange uniformity of the cold liquid, ultimately causing the exhaust gas to still carry a large amount of residual heat. The device includes: an outer heat exchange cylinder; a return pipe fixedly connected to the external joint of the outer heat exchange cylinder; another set of the connecting joints connected to an external exhaust pipe; a return heat exchange pipe inside the cold flow tube; and an external exhaust inner cylinder fixedly connected to the inside of the outer heat exchange cylinder. Through a dual-flow design of primary annular heat exchange and secondary center heat exchange, the spiral cold flow tube in the inner flow cavity first completes preliminary heat exchange with the hot gas, and then, through the return heat exchange tube nested in the center of the cold flow tube, the residual heat gas directly contacts the cold liquid inside the cold flow tube.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, and more specifically, it relates to a lightweight, high-heat-exchange-capacity internal and external coil heat exchanger. Background Technology

[0002] In fields such as heating, hot water supply, and industrial heating, heat pump systems have seen their application scope continuously expand due to their advantages of high energy utilization efficiency and strong environmental protection. As the core power component of the heat pump system, the operating status of the compressor directly determines the system's energy consumption and lifespan. In actual working conditions, if the exhaust temperature and exhaust pressure are too high after the refrigerant is compressed by the compressor, it can easily lead to carbonization of the compressor lubricating oil and aging of the seals, which in turn can cause increased mechanical wear and a decrease in cooling and heating efficiency. In severe cases, it can even cause the compressor to shut down and be damaged. In order to maintain lightweight and high heat exchange efficiency, a heat exchanger is needed.

[0003] Based on existing technology, it has been found that existing heat exchangers mostly rely on the flow of cold liquid to achieve heat exchange with exhaust gas. However, when the cold liquid flows in the flow channel, the contact distance between the cold liquid and the exhaust gas is the farthest on the inner side of the flow channel. Moreover, due to the obstruction of the cold liquid on the outer side, it is difficult to fully contact the high-temperature exhaust gas and complete the heat exchange. This results in poor overall heat exchange uniformity of the cold liquid, and ultimately causes the exhaust gas to still carry a large amount of residual heat, and the heat exchange efficiency does not meet expectations. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model relates to a lightweight, high-heat-exchange-capacity internal and external coil heat exchanger. This addresses the issue that the contact distance between the inner side of the flow channel and the exhaust gas is the farthest, and the outer side of the flow channel is blocked by the cold liquid, making it difficult to fully contact the high-temperature exhaust gas and complete heat exchange. This results in poor overall heat exchange uniformity of the cold liquid, ultimately causing the exhaust gas to still carry a large amount of residual heat.

[0005] This utility model provides a lightweight, high-heat-exchange-capacity internal and external coil heat exchanger, achieved through the following specific technical means:

[0006] A lightweight, high-heat-exchange-capacity internal and external coil heat exchanger includes: an outer heat exchange cylinder; an inner flow cavity inside the outer heat exchange cylinder; an external connector at the top of the outer heat exchange cylinder; a cold flow tube inside the inner flow cavity; two flow divider connectors fixedly connected to the outside of the two pipe openings of the outer heat exchange cylinder; flow divider side pipes fixedly connected to the outside of the two flow divider connectors; butt connectors fixedly connected to the ends of the two flow divider side pipes; a return flow pipe fixedly connected to the outside of the connectors of the outer heat exchange cylinder; an external drain pipe connected to another set of butt connectors; a return heat exchange tube inside the cold flow tube; and an external drain inner cylinder fixedly connected to the inside of the outer heat exchange cylinder.

[0007] Preferably, the heat exchange outer cylinder is configured as an annular structure; a set of joints is fixedly connected to the outer wall of the heat exchange outer cylinder; and two pipe openings are provided on the heat exchange outer cylinder.

[0008] Preferably, the inner flow cavity is connected to the joint on the outer heat exchange cylinder; the outer joint is connected to the inner flow cavity.

[0009] Preferably, both ends of the cold flow pipe are connected to the two openings of the heat exchange outer cylinder, respectively; the other end of the return flow pipe is connected to a set of connectors.

[0010] Preferably, the two ends of the reflux heat exchange tube are fixedly connected to the inside of the two stream side tubes, and the two ends of the reflux heat exchange tube are connected to the two sets of butt joints.

[0011] Preferably, the bottom of the outer discharge inner cylinder is provided with a connector; the top of the outer discharge inner cylinder is connected to the other end of the outer discharge pipe.

[0012] The lightweight, high-heat-exchange-capacity internal and external coil heat exchanger proposed in this invention has the following beneficial effects:

[0013] 1. This heat exchanger adopts a dual-flow design with primary annular heat exchange and secondary central heat exchange. First, the spiral cold flow tube in the inner flow cavity completes the initial heat exchange with the hot gas. Then, through the return heat exchange tube nested in the center of the cold flow tube, the residual heat of the hot gas directly contacts the cold liquid inside the cold flow tube, avoiding the problem of insufficient heat exchange of the inner cold liquid and improving the overall heat exchange efficiency.

[0014] 2. The cold flow tubes are arranged in a spiral shape, which prolongs the residence time of the cold liquid in the inner flow cavity compared to straight pipes, and at the same time expands the contact area between the cold liquid and the hot gas. Combined with the annular space design of the inner flow cavity, the hot gas can diffuse evenly in the annular gap, avoiding local airflow congestion, further ensuring heat exchange uniformity, and avoiding local overheating or heat exchange dead zones caused by uneven airflow in traditional heat exchangers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional assembly structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the three-dimensional assembly structure of this utility model from a bottom view.

[0017] Figure 3 This is an exploded structural diagram of the present invention.

[0018] Figure 4 This is an exploded bottom view structural diagram of this utility model.

[0019] Figure 5 This is a partial cross-sectional structural diagram of the present invention.

[0020] Figure 6 This utility model is composed of Figure 5 A schematic diagram of the enlarged structure of part A.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1. Heat exchange outer cylinder; 2. Inner flow cavity; 3. External connector; 4. Cold flow tube; 5. Flow divider connector; 6. Flow divider side tube; 7. Butt connector; 8. Return pipe; 9. External drain pipe; 10. Return heat exchange tube; 11. External drain inner cylinder. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0024] Example 1: As shown in the attached document Figure 1 To be continued Figure 6As shown: This utility model provides a lightweight, high-heat-exchange-capacity internal and external coil heat exchanger, including: an outer heat exchange cylinder 1; the outer heat exchange cylinder 1 is used to assist in the installation and fixation of other structures of the device, so as to facilitate the overall stability of the heat exchanger and facilitate the heat exchange and exhaust of hot gas; the inner cavity 2 is provided inside the outer heat exchange cylinder 1; the inner cavity 2 is used to transport the hot gas, so as to facilitate sufficient contact with the cold flow tube 4, so as to facilitate the heat exchange between the cold liquid and the hot gas; the top of the outer heat exchange cylinder 1 is provided with an external connector 3; the external connector 3 is used to connect to the gas transmission pipeline. To facilitate the delivery of hot air to the inner flow cavity 2; the inner flow cavity 2 is equipped with a cold flow pipe 4; the cold flow pipe 4 is used to transport the cold liquid, making it spirally transported within the inner flow cavity 2 for convenient heat exchange; two flow divider joints 5 are fixedly connected to the outside of the two pipe openings of the heat exchange outer cylinder 1; the flow divider joints 5 are used to connect the heat exchanger's connection nodes in conjunction with the flow divider side pipes 6 and the connectors 7, to facilitate the delivery of cold liquid and hot air; the flow divider side pipes 6 are fixedly connected to the outside of the two flow divider joints 5; the flow divider side pipes 6 are used to assist in connecting the heat exchanger's connection nodes. The two branch pipes 6 are connected to each other, and the return heat exchange tubes 10 are connected in conjunction with the return pipe 8 to facilitate the hot gas to undergo a spiral flow process. The ends of the two branch pipes 6 are respectively fixed with connectors 7. The connectors 7 are used to assist in connecting the two branch pipes 6 to the return pipe 8 and the external exhaust pipe 9. The heat exchange outer cylinder 1 is fixed to the outside of the joint with the return pipe 8. The return pipe 8 is used to connect the inner flow cavity 2 to the return heat exchange tube 10 in conjunction with the branch pipes 6 to facilitate the hot gas to re-enter the interior of the inner flow cavity 2. Another set of connectors 7 is connected to the external exhaust pipe 9. The external discharge pipe 9 is used to connect the return heat exchange pipe 10 and the external discharge inner cylinder 11 in conjunction with the diversion side pipe 6, so as to discharge the hot gas that has undergone secondary heat exchange. The cold flow pipe 4 is equipped with a return heat exchange pipe 10. The return heat exchange pipe 10 is used to recirculate the hot gas through the internal arrangement of the cold flow pipe 4. The gas heat is fully exchanged through central heat exchange and secondary recirculation, which facilitates the utilization of heat energy. The heat exchange outer cylinder 1 is fixedly connected to the internal arrangement of the external discharge inner cylinder 1. The external discharge inner cylinder 11 is used to discharge the hot gas after sufficient heat exchange.

[0025] Example 2: Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 6 As shown, the heat exchange outer cylinder 1 is configured as an annular structure; a set of joints is fixedly connected to the outer wall of the heat exchange outer cylinder 1; and two pipe openings are provided on the heat exchange outer cylinder 1.

[0026] The inner flow cavity 2 is connected to the joint on the outer heat exchange cylinder 1; the outer joint 3 is connected to the inner flow cavity 2.

[0027] The two ends of the cold flow pipe 4 are connected to the two pipe openings of the heat exchange outer cylinder 1 respectively; the other end of the return flow pipe 8 is connected to a set of connectors 7.

[0028] The two ends of the reflux heat exchange tube 10 are fixed inside the two stream side tubes 6 respectively, and the two ends of the reflux heat exchange tube 10 are connected to the two sets of butt joints 7 respectively.

[0029] The bottom of the outer discharge inner cylinder 11 is provided with a connector; the top of the outer discharge inner cylinder 11 is connected to the other end of the outer discharge pipe 9.

[0030] The specific usage and function of this embodiment are as follows:

[0031] In this invention, during use, external hot gas enters the outer connector 3 through a gas delivery pipe and then enters the inner flow cavity 2 of the heat exchange outer cylinder 1 through the outer connector 3. At this time, within the annular space of the inner flow cavity 2, the cold flow pipe 4 is conveying coolant along a spiral path. The coolant enters from one end of the heat exchange outer cylinder 1 and exits from the other end. The hot gas diffuses in an annular manner within the inner flow cavity 2, making full contact with the outer wall of the cold flow pipe 4. Through heat conduction, it transfers heat to the coolant within the cold flow pipe 4, completing the first stage of heat exchange. This stage can quickly remove most of the heat from the hot gas. After the first stage of heat exchange, the hot gas diffuses along the annular space within the inner flow cavity 2 to the pipe opening areas at both ends of the heat exchange outer cylinder 1. Guided by the flow divider 5, it enters the flow divider side pipe 6. Subsequently, the hot gas enters the return flow pipe through the connecting connector 7. Pipe 8, supplied by the return pipe 8 to the joint on the outer wall of the heat exchange outer cylinder 1, finally enters the return heat exchange tube 10 nested inside the cold flow tube 4. At this time, the hot gas in the return heat exchange tube 10 flows along the central axis, while the cold liquid in the cold flow tube 4 is wrapped around the return heat exchange tube 10 along a spiral path. The hot gas passes through the tube wall of the return heat exchange tube 10 and directly contacts the cold liquid inside the cold flow tube 4, transferring the residual heat to the cold liquid and completing the secondary central heat exchange. The low-temperature gas that has completed the secondary heat exchange is discharged from the other end of the return heat exchange tube 10 and re-enters the corresponding diversion side pipe 6, and enters the external discharge pipe 9 through the connector 7. Finally, the low-temperature gas is supplied by the external discharge pipe 9 to the external discharge inner cylinder 11, and is connected to the external exhaust pipe through the joint at the bottom of the external discharge inner cylinder 11 to achieve stable external discharge.

[0032] The following points should be noted in this article:

[0033] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0034] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0035] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. Lightweight, high-heat-exchange-capacity internal and external coil heat exchangers, including: A heat exchange outer cylinder (1); characterized in that: the heat exchange outer cylinder (1) is provided with an inner flow cavity (2); the top of the heat exchange outer cylinder (1) is provided with an outer connector (3); the inner flow cavity (2) is provided with a cold flow pipe (4); two pipe openings of the heat exchange outer cylinder (1) are respectively fixedly connected to a flow divider connector (5); the two flow divider connectors (5) are respectively fixedly connected to a flow divider side pipe (6); the ends of the two flow divider side pipes (6) are respectively fixedly connected to a butt connector (7); the joint of the heat exchange outer cylinder (1) is fixedly connected to a return flow pipe (8); another set of butt connectors (7) is connected to an external discharge pipe (9); the cold flow pipe (4) is provided with a return heat exchange pipe (10); the heat exchange outer cylinder (1) is fixedly connected to an external discharge inner cylinder (11).

2. The lightweight, high-heat-exchange-rate internal and external coil heat exchanger according to claim 1, characterized in that: The heat exchange outer cylinder (1) is configured as an annular structure; a set of joints is fixedly connected to the outer wall of the heat exchange outer cylinder (1); and two pipe openings are provided on the heat exchange outer cylinder (1).

3. The lightweight, high-heat-exchange-rate internal and external coil heat exchanger according to claim 1, characterized in that: The inner flow cavity (2) is connected to the joint on the heat exchange outer cylinder (1); the outer joint (3) is connected to the inner flow cavity (2).

4. The lightweight, high-heat-exchange-rate internal and external coil heat exchanger according to claim 1, characterized in that: The two ends of the cold flow pipe (4) are connected to the two ports of the heat exchange outer cylinder (1); the other end of the return pipe (8) is connected to a set of connectors (7).

5. The lightweight, high-heat-exchange-rate internal and external coil heat exchanger according to claim 1, characterized in that: The two ends of the reflux heat exchange tube (10) are respectively fixed inside the two stream side tubes (6), and the two ends of the reflux heat exchange tube (10) are respectively connected to the two sets of butt joints (7).

6. The lightweight, high-heat-exchange-rate internal and external coil heat exchanger according to claim 1, characterized in that: The bottom of the outer discharge inner cylinder (11) is provided with a connector; the top of the outer discharge inner cylinder (11) is connected to the other end of the outer discharge pipe (9).

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