Integrally-formed evaporator outlet pipe connector
The evaporator outlet pipe connector, integrally formed by hydraulic pressing, solves the problem of weak points at the welded joint, achieves smooth fluid transition and uniform stress distribution, and improves the pressure resistance of the evaporator and the stability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-04-10
AI Technical Summary
The existing welding connection method for evaporator outlet pipe has problems such as weak welding and weld defects, which leads to leakage risks, affects system performance and safety, and stress concentration at the weld joint is prone to causing failure.
The evaporator outlet pipe connector, integrally formed using a hydraulic pressing process, includes a first outlet pipe, a variable diameter transition section, and a second outlet pipe. The seamless connection enables a smooth fluid transition, eliminates welded joints, evenly distributes stress, and improves pressure resistance.
It improves the stability and service life of the evaporator, reduces the risk of leakage and rupture, and ensures the safe and efficient operation of the system.
Smart Images
Figure CN224108391U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to evaporator outlet pipe relay technical field especially one -piece forming's evaporator outlet pipe relay, BACKGROUND
[0002] The design of reducing the diameter of the evaporator outlet pipe is an important engineering detail in refrigeration / heat pump systems, mainly based on fluid mechanics, thermodynamics and system optimization requirements. From the perspective of fluid mechanics and thermodynamics, in-depth analysis shows that small pipe diameter has unique advantages inside the evaporator. Due to the relatively narrow space of small pipe diameter, the flow rate of fluid will be significantly increased when flowing in it, and the degree of turbulence will also be enhanced. This high-speed and turbulent flow state greatly promotes the heat exchange between the refrigerant and the surrounding environment, greatly improving the heat exchange efficiency of the evaporator. Therefore, in order to achieve efficient heat exchange process, small pipe diameter design is usually adopted inside the evaporator.
[0003] However, if the small pipe diameter is still maintained when the refrigerant flows out of the evaporator into the outlet pipe, a series of problems will be caused which are not conducive to the operation of the system. Small pipe diameter will cause greater flow resistance, which means that the refrigerant needs to overcome greater resistance during flow. The increase of resistance will make the suction pressure of the compressor too low, thereby affecting the operating efficiency of the whole system. According to the principle of thermodynamics, the energy efficiency ratio of the system is closely related to the suction pressure of the compressor, and the too low suction pressure will cause the energy efficiency ratio of the system to decrease, resulting in waste of energy.
[0004] In order to solve the above problems, in the design of the evaporator, the diameter of the outlet pipe is usually changed to a large diameter. After the diameter is changed, the flow space of the gas is increased, and the flow rate is correspondingly reduced, which helps to reduce the pressure loss of the evaporated gas in the pipeline. The reduction of pressure loss makes the refrigerant flow more smoothly, so that the evaporation process is more sufficient, which improves the refrigeration or heating effect of the system, and also improves the energy efficiency ratio of the system.
[0005] At present, the most common way of changing the diameter of the outlet pipe of the evaporator on the market is to weld the rough pipe and the relay pipe after they are connected. In this way, the outer diameter of the relay pipe is smaller than that of the rough pipe, and the change of pipe diameter is realized by connecting and welding. Although this method can meet the needs of diameter change to some extent, it also has obvious disadvantages. Since two pipes are connected together, the welding place becomes a potential risk point. During the welding process, problems such as weak welding and defects in the welding seam may occur, which may cause gas leakage. Gas leakage not only affects the performance of the system and reduces the refrigeration or heating effect, but also may pollute the environment and even pose a safety hazard. UTILITY MODEL CONTENTS
[0006] The utility model overcomes the defects in the prior art, provides a kind of integrally formed evaporator outlet pipe relay, adopts water pressure technology integrally formed, eliminates the welding joint produced by traditional multi-section welding mode, makes the weak point that outlet pipe relay whole structure does not exist due to welding.Under the working environment of long-term bearing high pressure, high-speed fluid impact, integrally formed structure can evenly disperse stress, avoids the problem of stress concentration at welding joint, greatly improves the pressure resistance, reduces the risk of leakage, rupture and other failures caused by stress concentration, effectively guarantees the stability and service life of system.
[0007] In order to solve the above technical problems, the utility model is realized by the following technical scheme:
[0008] An integrally formed evaporator outlet pipe relay, comprising a first outlet pipe, a variable-diameter transition section and a second outlet pipe, which are integrally formed by water pressure process;Wherein the inner diameter of the first outlet pipe is larger than that of the second outlet pipe, and the variable-diameter transition section is used to connect the first outlet pipe and the second outlet pipe;
[0009] The second outlet pipe extends to the inside of the evaporator to increase the fluid flow rate and form turbulent flow.
[0010] The first outlet pipe extends to the outside of the evaporator to reduce the pressure loss of evaporated gas in the pipeline.
[0011] Further, the variable-diameter transition section is tapered or streamlined, and is seamlessly connected to the two pipes by water pressure process.
[0012] Further, the second outlet pipe comprises a slanted section, a parallel section, a curved section and a vertical variable-diameter section connected in sequence.
[0013] Further, the first outlet pipe is provided with a vertical docking port near the variable-diameter transition section.
[0014] Further, the included angle between the slanted section and the parallel section is between 30° and 40°.
[0015] Further, the first outlet pipe and the vertical docking port are not on the same axis.
[0016] Further, the length of the variable-diameter transition section is 3 to 6 mm.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] The outlet pipe relay is integrally formed by using the water pressure process, welding joints generated by the traditional multi-section welding mode are eliminated, and the outlet pipe relay integral structure does not have the weak point caused by welding. In the working environment of long-term bearing high pressure and high-speed fluid impact, the integrally formed structure can uniformly disperse stress, avoids the problem of stress concentration at the welding joint, greatly improves the pressure resistance, reduces the risk of leakage, rupture and other failures caused by stress concentration, and effectively guarantees the stability and service life of the system. BRIEF DESCRIPTION OF DRAWINGS
[0019] The accompanying drawings are used to provide a further understanding of the utility model, together with the embodiments of the utility model, to explain the utility model, and do not constitute a limitation on the utility model, in the drawings:
[0020] Figure 1 is the overall structure schematic diagram of the outlet pipe relay of the utility model embodiment;
[0021] Figure 2 is the traditional outlet pipe relay structure schematic diagram.
[0022] In the drawing: 1, first outlet pipe; 101, vertical butt joint; 2, reducing transition section; 3, second outlet pipe; 301, inclined section; 302, parallel section; 303, elbow section; 304, vertical reducing section; A1, thick pipe section; A2, relay pipe insertion section. DETAILED DESCRIPTION
[0023] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and do not limit the utility model.
[0024] As Figure 1 shown, the integrally formed evaporator outlet pipe relay includes a first outlet pipe 1, a reducing transition section 2 and a second outlet pipe 3, which are integrally formed by the water pressure process; wherein the inner diameter of the first outlet pipe 1 is greater than the inner diameter of the second outlet pipe 3, and the reducing transition section 2 is used to connect the first outlet pipe 1 and the second outlet pipe 3; the second outlet pipe 3 extends to the inside of the evaporator to increase the fluid flow rate and form a turbulent flow; the formation of the turbulent flow is crucial to improve the heat transfer efficiency inside the evaporator, which can enhance the heat exchange between the fluid and the evaporator wall, make the heat transfer more uniform and rapid, and thus improve the refrigeration or evaporation effect of the entire evaporator.
[0025] The second outlet pipe 1 extends to the outside of the evaporator to reduce the pressure loss of the evaporated gas in the pipeline, and a large pressure loss in the gas conveying process will cause energy waste and reduce the system efficiency, the design optimizes the pipeline structure, reduces the resistance of gas flow, ensures that the evaporated gas can be smoothly conveyed with low energy loss, and improves the external conveying efficiency of the system.
[0026] Compared with the outlet pipe adapter of the traditional multi-section welding, the water pressure process integrated forming mode can eliminate the welding joint, so that the outlet pipe adapter has no weak point and the pressure resistance is improved.
[0027] The variable-diameter transition section 2 is taper or streamline taper design, which not only conforms to the principle of fluid mechanics, can make the fluid transition smoothly in the variable-diameter process, reduce energy loss, but also realizes seamless connection with the two end pipes through water pressure process, which ensures that the fluid will not leak and turbulent when flowing through the variable-diameter transition section, further improves the stability and efficiency of the system.
[0028] The second outlet pipe 3 includes a slope section 301, a parallel section 302, a turning section 303 and a vertical variable-diameter section 304 connected in sequence. The included angle between the slope section 301 and the parallel section 302 is between 30° and 40°, preferably 36°. At this angle, the fluid can smoothly transition from the slope section to the parallel section, reducing flow resistance and energy loss, while also helping to maintain the turbulent state of the fluid and improve heat transfer efficiency.
[0029] The first outlet pipe 1 is also provided with a vertical docking interface 101 near the variable-diameter transition section 2, which is used to dock the gas shunt pipe to realize fluid transmission and exchange between different functional modules, and meet the diversified use requirements of the system.
[0030] The first outlet pipe 1 and the vertical docking interface 101 are not on the same axis.
[0031] The length of the variable-diameter transition section 2 is 3 to 6 mm, preferably 4 mm. The appropriate length can make the fluid realize smooth pressure and flow rate change in the variable-diameter transition section, avoiding the problems of increased energy loss or unstable fluid flow caused by too long or too short length.
[0032] As shown in FIG. 1, the variable-diameter transition section 2 is arranged between the first outlet pipe 1 and the second outlet pipe 3. Figure 2As shown, the conventional evaporator outlet pipe joint is formed by sleeving a thick pipe section A1 and a secondary pipe A2, the inner diameter of the thick pipe section A1 is larger than that of the secondary pipe A2, and the two are sleeved together and then welded, in the welding process, the welding area will undergo a process of high-temperature heating and rapid cooling, which will cause the metal structure at the welding joint to change, thereby forming a complex stress distribution, and stress concentration problems are extremely likely to occur. Stress concentration is like a "time bomb" buried in the structure, which greatly reduces the strength of the welding joint and makes it more prone to deformation and damage when subjected to external forces. At the same time, the sealing performance of the welding joint is also difficult to effectively guarantee, and welding defects such as pores and slag may occur during the welding process, which will damage the integrity of the welding joint and cause the sealing performance to deteriorate. Even after strict detection and treatment after welding is completed, it is difficult to completely eliminate these potential sealing risks.
[0033] In actual working environment, the evaporator outlet pipe joint needs to withstand long-term high-pressure and high-speed fluid impact. High pressure means that the pressure inside the pipe is large, which puts higher requirements on the structural strength of the pipe; high-speed fluid will cause strong scouring and wear on the inner wall of the pipe. In such harsh working conditions, the weak points of stress concentration and poor sealing at the welding joint will be further amplified. Over time, these weak points are extremely likely to cause leakage, rupture and other failures. Once leakage occurs, not only will it cause waste of fluid, but it may also cause pollution and damage to surrounding equipment and the environment; rupture failure is even more serious, which may cause the entire system to shut down, affecting the normal production, and even may cause safety accidents. The occurrence of these failures will seriously affect the stability and service life of the system, increase the maintenance cost and operation risk of the equipment, and cause huge economic losses to the enterprise.
[0034] The evaporator outlet pipe joint of the utility model is integrally formed by using water pressure process, which eliminates the welding joint generated by the traditional multi-section welding method, so that the overall structure of the outlet pipe joint does not have weak points caused by welding. In the working environment of long-term high-pressure and high-speed fluid impact, the integrally formed structure can uniformly disperse stress, avoiding the problem of stress concentration at the welding joint, greatly improving the pressure resistance, reducing the risk of leakage, rupture and other failures caused by stress concentration, and effectively guaranteeing the stability and service life of the system.
[0035] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. An integrally formed evaporator outlet tube extension, characterized by, The first outlet pipe (1), the variable-diameter transition section (2) and the second outlet pipe (3) are integrally formed by the water pressure process; the inner diameter of the first outlet pipe (1) is larger than that of the second outlet pipe (3), and the variable-diameter transition section (2) is used for connecting the first outlet pipe (1) and the second outlet pipe (3); The second outlet pipe (3) extends to the inside of the evaporator to increase the fluid flow rate and form a turbulent flow; The first outlet pipe (1) extends to the outside of the evaporator to reduce the pressure loss of the evaporated gas in the pipeline.
2. The integrally formed evaporator outlet tube extension of claim 1, wherein, The variable-diameter transition section (2) is tapered or streamlined and is seamlessly connected with the pipes at both ends by the water pressure process.
3. The integrally formed evaporator outlet tube extension of claim 2, wherein, The second outlet pipe (3) comprises a slanted section (301), a parallel section (302), a curved section (303) and a vertical variable-diameter section (304) connected in sequence.
4. The integrally formed evaporator outlet tube extension of claim 3, wherein, The first outlet pipe (1) is further provided with a vertical docking interface (101) near the variable-diameter transition section (2).
5. The integrally formed evaporator outlet tube extension of claim 4, wherein, The included angle between the slanted section (301) and the parallel section (302) is between 30° and 40°.
6. The integrally formed evaporator outlet tube extension of claim 5 wherein, The first outlet pipe (1) and the vertical docking interface (101) are not on the same axis.
7. The integrally formed evaporator outlet tube extension of any of claims 1-6, wherein, The length of the variable-diameter transition section (2) is 3-6 mm.