Heat exchange structure of capillary tube and return tube
By incorporating fins, corrugated tubes, and a counter-current arrangement between the capillary tube and the return tube, combined with an insulation layer and a spiral guide plate, the problem of insufficient heat transfer in existing technologies is solved, achieving more efficient heat exchange and more stable structural operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2026-04-10
AI Technical Summary
In existing capillary and reflux tube heat exchange structures, the heat exchange between the hot fluid and the cold fluid mainly relies on direct conduction through the tube wall and simple convection, resulting in insufficient heat transfer and ineffective cooling or heating.
The design incorporates fins on the outer wall of the capillary tube and a corrugated section wound around the outside of the return tube, combined with a counter-current arrangement, to increase the contact area and flow path, thereby enhancing heat exchange. The inner wall is equipped with a spiral guide plate, and the outer wall uses an insulation layer and metal mesh to enhance the heat transfer path. Metal sheets and rock wool materials are used to improve heat dissipation efficiency.
It improves the sufficiency and efficiency of heat exchange, enhances the uniformity of temperature difference distribution between hot and cold fluids, and improves the energy utilization efficiency and structural stability of the system.
Smart Images
Figure CN224108400U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to capillary technology field, specifically to a capillary and the heat exchange structure of return pipe. BACKGROUND
[0002] The capillary in air conditioning equipment is an important throttling component, which plays a key role in the system. It is a long and uniform inner diameter copper pipe, which does not need complex adjusting mechanism, and throttles and depressurizes the refrigerant by its length and inner diameter. The high temperature and high pressure refrigerant liquid discharged by the compressor enters the capillary after being condensed in the condenser. Due to the small diameter and certain length of the capillary, the refrigerant produces resistance, so that the pressure of the refrigerant gradually decreases when passing through, and the refrigerant changes from high pressure liquid to low pressure liquid, and absorbs heat in the process of pressure reduction, and the temperature also decreases. Subsequently, the low pressure and low temperature refrigerant enters the evaporator to absorb heat and achieve refrigeration effect.
[0003] At present, in some heat exchange structures, the contact mode of the capillary and the return pipe is relatively simple, which makes the heat exchange between the hot fluid and the cold fluid mainly depend on the direct conduction and simple convection of the pipe wall, the heat transfer path is relatively single, and the heat transfer is not sufficient, which leads to the fact that the cold fluid cannot be fully heated or the hot fluid cannot be effectively cooled. UTILITY MODEL CONTENT
[0004] The utility model aims to provide a capillary and the heat exchange structure of return pipe, to solve the above-mentioned deficiencies in the prior art.
[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a capillary and the heat exchange structure of return pipe, comprising: a capillary, the outer wall of the capillary is provided with a fin, one end of the capillary is connected with a wave section pipe, the capillary is wound and arranged on the outside of the return pipe, and the outer wall of the return pipe is provided with a heat preservation layer.
[0006] Further, the capillary and the return pipe adopt counter flow arrangement mode.
[0007] Further, the outer side of one end of the heat preservation layer is provided with a metal mesh.
[0008] Further, one end of the heat preservation layer is connected with a support, the both ends of the support are provided with rubber pads, and the top of the support is connected with a connecting rod.
[0009] Further, the inner wall of the return pipe is connected with a spiral guide plate.
[0010] Further, the capillary adopts copper material containing zinc.
[0011] In the above technical solution, the heat exchange structure of the capillary tube and the return pipe has the beneficial effects of the utility model:
[0012] The utility model discloses a corrugated section pipe is designed, and the fluctuation shape makes the contact point of fluid in the flowing process and pipe wall increase, and heat transfer path shortens, and heat exchange is more sufficient, and the capillary tube that is wound and arranged at the outside of return pipe can also increase the contact area between capillary tube and return pipe, improves the heat exchange efficiency, and the spiral winding mode can also prolong the flowing path of fluid in the capillary tube, and increases the heat exchange time.
[0013] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, not for limiting the present disclosure.
[0014] The present application provides a summary of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.
[0016] Figure 1 The three-dimensional structure schematic diagram provided by the utility model embodiment is shown in the figure.
[0017] Figure 2 The three-dimensional structure schematic diagram provided by the utility model embodiment is shown in the figure.
[0018] Figure 3 The three-dimensional structure schematic diagram provided by the utility model embodiment is shown in the figure.
[0019] Figure 4 The partial structure schematic diagram provided by the utility model embodiment is shown in the figure.
[0020] Explanation of reference signs:
[0021] 1, heat preservation layer;2, wave section pipe;3, metal net;4, support;5, connecting rod;6, rubber pad;7, capillary tube;8, fin;9, return pipe;10, spiral guide plate. DETAILED DESCRIPTION
[0022] To make the purposes, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.
[0023] Please refer to Figures 1-4 A heat exchange structure of capillary tube and return pipe, comprising: a capillary tube 7, the outer wall of the capillary tube 7 is provided with fins 8, one end of the capillary tube 7 is connected with a wave section pipe 2, the capillary tube 7 is wound outside the return pipe 9, the outer wall of the return pipe 9 is provided with a heat preservation layer 1, and the capillary tube 7 and the return pipe 9 adopt a counter-flow arrangement mode.
[0024] In the further provided embodiments of the utility model, the capillary tube 7 is wound outside the return pipe 9, and the capillary tube 7 is tightly wound on the outer wall of the return pipe 9, and this structure can increase the contact area between the capillary tube 7 and the return pipe 9 and improve the heat exchange efficiency. Meanwhile, the spiral winding mode can also prolong the flow path of the fluid in the capillary tube 7 and increase the heat exchange time, and the fins 8 provided on the outer wall of the capillary tube 7 can further increase the heat exchange area. The fins 8 adopt a metal sheet structure and are uniformly distributed on the outer wall of the capillary tube 7. The fins 8 can effectively improve the heat dissipation efficiency of the capillary tube 7 and accelerate the heat transfer speed, the heat preservation layer 1 provided on the outer wall of the return pipe 9 is rock wool, the heat loss of the fluid in the return pipe 9 is reduced, the energy utilization efficiency of the system is improved, the wave section pipe 2 connected with one end of the capillary tube 7 is designed, the fluctuating shape of the wave section pipe 2 increases the contact points between the fluid and the pipe wall during the flow process, the heat transfer path is shortened, the heat exchange is more sufficient, and the hot fluid and the cold fluid flow in opposite directions by adopting the counter-flow arrangement mode of the capillary tube 7 and the return pipe 9. During the counter-flow process, the temperature difference distribution of the hot fluid and the cold fluid on the entire heat exchange surface is relatively uniform, and a large average temperature difference can be maintained at all times.
[0025] Further, a metal mesh 3 is installed outside one end of the heat preservation layer 1, a support 4 is connected with one end of the heat preservation layer 1, rubber pads 6 are arranged at both ends of the support 4, a connecting rod 5 is connected with the top of the support 4, spiral guide plates 10 are connected with the inner wall of the return pipe 9, and the capillary tube 7 adopts a copper material containing zinc.
[0026] In the further provided embodiment of the utility model, the metal net 3 is arranged between the return pipe 9 and the wave section pipe 2, can form an additional heat conduction channel between the two pipes, increase the heat transfer path, improve the heat exchange efficiency, the rubber pad 6 arranged at both ends of the support 4 can not only fix the capillary tube 7 on the outside of the return pipe 9, but also can absorb the vibration generated when the equipment starts, and the spiral guide plate 10 can guide the spiral motion of the hot fluid in the return pipe 9, increase the disturbance degree of the fluid, reduce the thickness of the boundary layer, thereby strengthen the convective heat transfer, the capillary tube 7 is made of copper material containing zinc, the addition of zinc can improve the strength and hardness of copper, compared with pure copper, the performance is better in bearing pressure and resisting deformation, in the actual heat exchange structure operation process, the impact force and pressure change generated by fluid flow can be better resisted, the risk of pipeline deformation, rupture and the like is reduced, and long-term stable operation of the structure is ensured.
[0027] In the utility model, the capillary tube 7 is wound and arranged on the outside of the return pipe 9, the capillary tube 7 is tightly wound on the outer wall of the return pipe 9, this structure can increase the contact area between the capillary tube 7 and the return pipe 9, improve the heat exchange efficiency. Meanwhile, the spiral winding mode can also prolong the flow path of the fluid in the capillary tube 7, increase the heat exchange time, and the fins 8 arranged on the outer wall of the capillary tube 7 can further increase the heat exchange area. The fins 8 adopt a metal sheet structure and are uniformly distributed on the outer wall of the capillary tube 7. The existence of the fins 8 can effectively improve the heat dissipation efficiency of the capillary tube 7 and accelerate the heat transfer speed. The heat preservation layer 1 arranged on the outer wall of the return pipe 9 is rock wool, the heat loss of the fluid in the return pipe 9 is reduced, the energy utilization efficiency of the system is improved, and the wave section pipe 2 connected to one end of the capillary tube 7 is designed. The undulating shape increases the contact points of the fluid with the pipe wall during flow, shortens the heat transfer path, and the heat exchange is more sufficient. By arranging the capillary tube 7 and the return pipe 9 in a counterflow arrangement, the hot fluid and the cold fluid flow in opposite directions. During the counterflow process, the temperature difference distribution of the hot fluid and the cold fluid on the entire heat exchange surface is relatively uniform, and a large average temperature difference can be maintained at all times.
[0028] The above only describes certain exemplary embodiments of the utility model in a descriptive manner, without doubt, for ordinary skilled person in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the utility model claims.
Claims
1. A heat exchange structure of capillary and return pipe, comprising: Capillary (7), characterized in that: the outer wall of the capillary (7) is provided with fins (8), one end of the capillary (7) is connected with a wave section pipe (2), the capillary (7) is wound outside the return pipe (9), the outer wall of the return pipe (9) is provided with a heat preservation layer (1).
2. The heat exchange structure of a capillary tube and a return tube according to claim 1, wherein The capillary (7) and the return pipe (9) adopt a countercurrent arrangement mode.
3. The heat exchange structure of a capillary tube and a return tube according to claim 1, wherein One end of the heat preservation layer (1) is provided with a metal mesh (3) outside.
4. The heat exchange structure of a capillary tube and a return tube according to claim 1, wherein One end of the heat preservation layer (1) is connected with a support (4) outside, both ends of the support (4) are provided with rubber pads (6), and the top of the support (4) is connected with a connecting rod (5).
5. The heat exchange structure of a capillary tube and a return tube according to claim 1, wherein The inner wall of the return pipe (9) is connected with a spiral guide plate (10).
6. The heat exchange structure of a capillary tube and a return tube according to claim 1, wherein The capillary (7) adopts a copper material containing zinc.