An evaporator piping structure designed to prevent freezing and cracking.

Abstract

This utility model relates to the field of evaporator piping and discloses an evaporator piping structure resistant to freezing and cracking. The structure includes an evaporator piping body with an internal anti-freezing and cracking device. The anti-freezing and cracking device includes a pipe and a connecting frame. In this utility model, the evaporator piping body's insulation ring, made primarily of closed-cell polyethylene foam (EPE), offers significant advantages in pipe insulation applications. Its tight internal closed-cell structure effectively blocks air convection and heat conduction, resulting in high insulation efficiency and significantly reducing heat loss or cold dissipation of the medium (such as hot water or low-temperature refrigerant) within the pipe, thus lowering energy consumption. This improves the pipe's resistance to freezing and cracking. The heat is transferred from the heating element to the pipe through a heat-conducting layer, allowing the heat source to circulate within the pipe. These structural features effectively prevent the evaporator piping body from freezing and cracking.

Description

Technical Field

[0001] This utility model relates to the field of evaporator piping, and in particular to an evaporator piping structure that is resistant to freezing and cracking. Background Technology

[0002] Evaporator tubing is a key component in a refrigeration system, enabling the core function of "heat absorption and evaporation." It is typically made of metal tubing with excellent thermal conductivity, such as copper, aluminum, or stainless steel. Its structural design must be adapted to different refrigeration scenarios, and common forms include serpentine tubes, U-shaped tubes, and microchannel flat tubes. In the refrigeration cycle, low-temperature, low-pressure liquid refrigerant from the throttling device enters the evaporator tubing. It exchanges heat with the surrounding medium to be cooled through the tube walls. Heat from outside the tubes is transferred to the refrigerant inside, causing it to rapidly vaporize into a gaseous state after absorbing heat. Simultaneously, the temperature of the medium outside the tubes decreases, thus achieving a cooling effect. To improve heat exchange efficiency, fins are often fitted to the outside of the evaporator tubing, and the tubing layout must balance fluid resistance and heat exchange uniformity to avoid icing or decreased heat exchange efficiency due to excessively slow refrigerant flow in certain areas. Its performance directly affects the energy consumption, cooling speed, and operational stability of the entire refrigeration system.

[0003] Anti-freeze-crack evaporator piping structures are specialized structures built upon conventional evaporator piping, specifically designed to address the problem of pipe cracking due to ice expansion or material embrittlement at low temperatures. These structures typically prioritize materials with higher low-temperature toughness, such as low-temperature resistant copper alloys or modified aluminum alloys, avoiding the increased brittleness and breakage of ordinary metals at low temperatures. Structurally, they often employ a "flexible buffer design," such as replacing some straight pipe sections with slightly deformable corrugated sections or U-shaped bends. When the refrigerant inside the pipe or the outside of the pipe expands due to frost or ice formation, the slight deformation of the pipe itself absorbs the expansion stress, reducing localized pressure concentration. Additionally, in addition to conventional heat exchange fins, some scenarios may include an "anti-overcooling coating" on the outer side of the pipes. "Or it can be fitted with a low-power heating strip. The former can slow down the excessively fast freezing rate at the junction of the fins and the pipes, while the latter can automatically maintain the basic temperature of the pipes when the temperature is too low, preventing the refrigerant inside the pipes from forming solid ice blockage due to excessive cooling and thus cracking the pipes. In addition, the pipe layout will deliberately avoid "dead bends" or local liquid accumulation areas to ensure that the refrigerant can still flow smoothly under low temperature conditions, reducing the risk of pipe expansion and cracking caused by local stagnation and freezing. Ultimately, the pipes can operate stably and avoid cracking even in extremely cold environments or environments with large temperature differences between system start-up and shutdown."

[0004] Existing evaporator piping systems are crucial for stable operation and preventing safety hazards and economic losses. If the piping ruptures due to freezing at low temperatures, the refrigerant inside will leak, directly interrupting the refrigeration cycle and preventing the equipment from cooling properly. For example, a cracked evaporator piping in a refrigerator can cause food inside to spoil rapidly, while industrial refrigeration equipment may experience production stoppages due to the inability to control temperature. Refrigerant leaks not only pollute the environment but may also mix with air to form flammable and explosive gases, posing fire and explosion risks. Furthermore, leaked refrigerant can cause frostbite if it comes into contact with the human body. Therefore, a frost-resistant evaporator piping structure is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a freeze-proof evaporator pipe structure, aiming to improve the existing freeze-proof evaporator pipe structure. If the pipe breaks due to low temperature freezing, the low-temperature refrigerant inside the pipe will leak, directly causing the refrigeration cycle to be interrupted and the equipment to be unable to cool down normally. For example, if the refrigerator evaporator pipe is damaged, the food inside will spoil quickly, and industrial refrigeration equipment may cause production to stop due to the inability to control the temperature. Refrigerant leakage not only pollutes the environment, but may also mix with air to form flammable and explosive gases, posing a fire and explosion safety risk. At the same time, if the leaked refrigerant comes into contact with the human body, it may cause frostbite.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an evaporator pipe structure resistant to freezing and cracking, comprising an evaporator pipe body, wherein an anti-freezing and cracking device is provided inside the evaporator pipe body; the anti-freezing and cracking device comprises a pipe and a connecting frame, wherein an outer connecting ring is snapped onto the outer side of the pipe, an outer fixing flange is connected to the inner flange of the outer connecting ring, an insulation ring is sleeved on the side of the pipe, a first connecting ring is snapped onto the side of the insulation ring, a first fixing flange is connected to the inner flange of the first connecting ring, a second connecting ring is snapped onto the side of the insulation ring, a second fixing flange is connected to the inner flange of the second connecting ring, a heating rod is fixedly connected inside the connecting frame, a heat-conducting layer is fixedly connected inside the connecting frame, and a vibration damping device is provided on the side of the pipe.

[0007] As a further description of the above technical solution: the vibration damping device includes a base, an anti-vibration rod is fixedly connected to the side of the base, a support leg is fixedly connected to the side of the base, a protective ring one is fixedly connected to the side of the anti-vibration rod away from the base, a protective ring two is snapped onto the side of the protective ring one away from the anti-vibration rod, a connecting screw is threaded into the internal thread of the protective ring two, and a vibration damping ring is fixedly connected to the side of the protective ring one.

[0008] As a further description of the above technical solution: both the first protective ring and the second protective ring have threaded grooves inside, and the threaded grooves inside the first protective ring and the second protective ring match the size of the connecting screw.

[0009] As a further description of the above technical solution: the outer connecting ring has a flange groove inside, and the flange groove inside the outer connecting ring matches the size of the outer fixed flange.

[0010] As a further description of the above technical solution: the inside of the connecting ring is provided with a flange groove, and the size of the flange groove inside the connecting ring matches that of the fixed flange.

[0011] As a further description of the above technical solution: the inner part of the connecting ring two is provided with a flange groove, and the flange groove inside the connecting ring two matches the size of the fixed flange two.

[0012] As a further description of the above technical solution: the side of the pipe is provided with a groove, and the size of the groove on the side of the pipe matches that of the vibration damping ring.

[0013] As a further description of the above technical solution: the side of the pipe is provided with a groove, and the size of the groove on the side of the pipe matches that of the outer connecting ring.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, the evaporator pipe body is designed with a closed-cell polyethylene foam (EPE) insulation ring as the main material before use, which makes it highly advantageous in pipe insulation applications: its tight closed-cell structure can effectively block air convection and heat conduction, resulting in high insulation efficiency. It can significantly reduce heat loss or cold loss of the medium (such as hot water or low-temperature refrigerant) in the pipe, thereby reducing energy consumption. This also improves the pipe's resistance to freezing and cracking. The heat is transferred from the heating rod to the pipe through the heat-conducting layer, allowing the heat source to circulate inside the pipe. Thus, the above structure achieves the effect of preventing the evaporator pipe body from freezing and cracking.

[0016] 2. In this utility model, the vibration damping ring can be snapped onto the outside of the pipeline. The design of the vibration damping ring as a whole, mainly made of EPDM rubber, gives it many significant advantages in pipeline vibration reduction applications: it has excellent elasticity and resistance to permanent compression deformation, and can stably absorb the vibration energy generated by the pipeline due to medium flow and equipment vibration for a long time, effectively weakening vibration transmission and reducing the risk of pipeline resonance and operating noise; at the same time, the anti-vibration rod on one side of the protective ring will work with the vibration damping ring to protect the pipeline from vibration, so that it will not damage the pipeline body and the side anti-freezing cracking device due to its own vibration during operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the evaporator pipeline for preventing freezing and cracking proposed in this utility model.

[0018] Figure 2 This is a three-dimensional cross-sectional view of the evaporator piping structure for frost-resistant crack prevention proposed in this utility model.

[0019] Figure 3 This is a side cross-sectional view of an evaporator piping structure for preventing freezing and cracking, as proposed in this utility model.

[0020] Figure 4 This is a three-dimensional side view of an evaporator piping structure designed to prevent freezing and cracking, as proposed in this utility model.

[0021] Legend:

[0022] 1. Evaporator piping body; 2. Anti-freeze and crack device; 21. Pipe; 22. External connecting ring; 23. External fixed flange; 24. Insulation ring; 25. Connecting ring one; 26. Fixed flange one; 27. Connecting ring two; 28. Fixed flange two; 29. ​​Connecting frame; 210. Heating rod; 211. Heat-conducting layer; 3. Vibration damping device; 31. Base; 32. Anti-vibration rod; 33. Support leg; 34. Protective ring one; 35. Protective ring two; 36. Connecting screw; 37. Vibration damping ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-2This utility model provides an embodiment of an evaporator piping structure with anti-freezing and cracking features, including an evaporator piping body 1, with an anti-freezing and cracking device 2 installed inside the evaporator piping body 1. The anti-freezing and cracking device 2 includes a pipe 21 and a connecting frame 29. An outer connecting ring 22 is snapped onto the outer side of the pipe 21, and a slot is provided on the side of the pipe 21, with the slot matching the size of the outer connecting ring 22. This design allows the outer connecting ring 22 to be snapped onto the side of the pipe 21. An outer fixing flange 23 is connected to the inner flange of the outer connecting ring 22, and a flange groove is provided inside the outer connecting ring 22, with the groove matching the size of the outer fixing flange 23. This design allows for flanged connection to the outside via the outer fixing flange 23 and the outer connecting ring 22. An insulation ring 24 is fitted onto the side of the pipe 21, and the main material of the insulation ring 24 is designed to be... Made of closed-cell polyethylene foam (EPE), the insulation ring 24 has a connecting ring 25 snapped onto its side. The internal flange of the connecting ring 25 is connected to a fixed flange 26. The internal flange groove of the connecting ring 25 matches the size of the fixed flange 26. The insulation ring 24 has a connecting ring 27 snapped onto its side. The internal flange of the connecting ring 27 is connected to a fixed flange 28. The internal flange groove of the connecting ring 27 matches the size of the fixed flange 28. This design allows the connecting ring 25 and the connecting ring 27 to be flanged together by the fixed flanges 26 and 28. A heating rod 210 is fixedly connected inside the connecting frame 29. A heat-conducting layer 211 is fixedly connected inside the connecting frame 29. A vibration damping device 3 is provided on the side of the pipe 21.

[0025] Reference Figures 3-4 The vibration damping device 3 includes a base 31, an anti-vibration rod 32 fixedly connected to the side of the base 31, a support leg 33 fixedly connected to the side of the base 31, a protective ring 34 fixedly connected to the side of the anti-vibration rod 32 away from the base 31, a protective ring 35 snapped onto the side of the protective ring 34 away from the anti-vibration rod 32, a connecting screw 36 threadedly connected to the inside of the protective ring 35, both the protective ring 34 and the protective ring 35 having internal threaded grooves, and the internal threaded grooves of the protective ring 34 and the protective ring 35 matching the size of the connecting screw 36. This design allows the protective ring 34 and the protective ring 35 to be threadedly fixed to each other by the connecting screw 36. A vibration damping ring 37 is fixedly connected to the side of the protective ring 34, and a slot is opened on the side of the pipe 21, and the slot on the side of the pipe 21 matching the size of the vibration damping ring 37. The vibration damping ring 37 is designed to be made of EPDM rubber as the main material.

[0026] Working Principle: Before use, the evaporator pipe body 1 is first fitted with an insulation ring 24 onto the outside of the pipe 21. The insulation ring 24, made primarily of closed-cell polyethylene foam (EPE), offers significant advantages in pipe 21 insulation applications: its tight closed-cell structure effectively blocks air convection and heat conduction, resulting in high insulation efficiency. This significantly reduces heat loss or cold dissipation of media such as hot water and low-temperature refrigerant within the pipe 21, thus lowering energy consumption. The material itself possesses excellent flexibility and impact resistance, is lightweight and not easily broken, and can easily fit pipes 21 of different diameters during installation. Even with slight bends in the pipe 21, it can tightly wrap around it, while also buffering the impact of minor external collisions on the pipe 21. It also has excellent waterproof and moisture-proof properties; the closed-cell structure prevents moisture from penetrating into the insulation layer, avoiding a decrease in insulation performance or corrosion of the pipe 21 due to moisture. It is highly resistant to chemical corrosion and can adapt to various environments such as humidity and acidity / alkali. In addition, the material is non-toxic, odorless, environmentally friendly, and pollution-free. It does not contain formaldehyde or other harmful substances and is friendly to the human body and the environment. It can be safely used in industrial pipelines 21 in food, medicine and other industries where material safety requirements are strict. This improves the anti-freezing and cracking performance of the pipeline 21. The connecting ring 25 and connecting ring 27 are connected to the insulation ring 24 and the pipeline 21 through the fixing flange 26 and fixing flange 28 to prevent leakage. One side of the pipeline 21 slides into the interior of the connecting frame 29 and is fitted with the heat-conducting layer 211. The heat-conducting layer 211 transfers the temperature of the heating rod 210 to the pipeline 21, allowing the heat source to circulate inside the pipeline 21. Finally, the pipeline 21 can be connected to external equipment and pipelines through the external connecting ring 22 and the external fixing flange 23. Thus, the above structure achieves the effect of preventing the evaporator pipeline body 1 from freezing and cracking.

[0027] When the pipes 21 inside the evaporator pipe body 1 are connected to each other, the vibration damping ring 37 can be snapped onto the outside of the pipe 21. The vibration damping ring 37, primarily made of EPDM rubber, offers several significant advantages in vibration damping applications on the pipe 21: it possesses excellent elasticity and resistance to permanent compression deformation, enabling it to stably absorb vibration energy generated by medium flow and equipment vibration in the pipe 21 over a long period, effectively reducing vibration transmission and lowering the risk of pipe resonance and operating noise; simultaneously, it exhibits excellent weather resistance, high and low temperature resistance, and can operate stably in environments ranging from -40℃ to 150℃, as well as chemical corrosion resistance, adapting to various complex working conditions such as indoor and outdoor environments, humidity, and acid / alkali conditions, and is not easily damaged by environmental factors. The vibration damping ring 37 is designed to prevent aging, cracking, or performance degradation, thus significantly extending its service life. Furthermore, the material is soft and easy to process, allowing for customization into various specifications and structures to suit different pipe diameters and vibration damping requirements. During installation, it fits snugly against the outer wall of the pipe 21, requiring no complex tools for assembly, combining practicality and convenience. It is also non-toxic and environmentally friendly. The protective ring 34 and the protective ring 35 are threaded together via connecting screws 36, securing the vibration damping ring 37 to the pipe 21. The anti-vibration rods 32 on the side of the protective ring 34 work in conjunction with the vibration damping ring 37 to protect the pipe 21 from vibration damage due to its own operational vibrations, thus ensuring the effectiveness of the anti-freezing and cracking device 2 on the side.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A freeze-resistant evaporator piping structure, comprising an evaporator piping body (1), characterized in that: The evaporator pipe body (1) is equipped with an anti-freezing and cracking device (2) inside; The anti-freezing crack device (2) includes a pipe (21) and a connecting frame (29). An outer connecting ring (22) is snapped onto the outer side of the pipe (21). An outer fixed flange (23) is connected to the inner flange of the outer connecting ring (22). An insulation ring (24) is sleeved on the side of the pipe (21). A connecting ring one (25) is snapped onto the side of the insulation ring (24). A fixed flange one (26) is connected to the inner flange of the connecting ring one (25). A connecting ring two (27) is snapped onto the side of the insulation ring (24). A fixed flange two (28) is connected to the inner flange of the connecting ring two (27). A heating rod (210) is fixedly connected inside the connecting frame (29). A heat-conducting layer (211) is fixedly connected inside the connecting frame (29). A vibration damping device (3) is provided on the side of the pipe (21).

2. The evaporator piping structure for preventing freezing and cracking according to claim 1, characterized in that: The vibration damping device (3) includes a base (31), an anti-vibration rod (32) is fixedly connected to the side of the base (31), a support leg (33) is fixedly connected to the side of the base (31), a protective ring (34) is fixedly connected to the side of the anti-vibration rod (32) away from the base (31), a protective ring (35) is snapped onto the side of the protective ring (34) away from the anti-vibration rod (32), a connecting screw (36) is threaded into the internal part of the protective ring (35), and a vibration damping ring (37) is fixedly connected to the side of the protective ring (34).

3. The evaporator piping structure for preventing freezing and cracking according to claim 2, characterized in that: Both the first protective ring (34) and the second protective ring (35) have threaded grooves inside, and the threaded grooves inside the first protective ring (34) and the second protective ring (35) match the size of the connecting screw (36).

4. The evaporator piping structure for preventing freezing and cracking according to claim 1, characterized in that: The outer connecting ring (22) has a flange groove inside, and the flange groove inside the outer connecting ring (22) matches the size of the outer fixed flange (23).

5. The evaporator piping structure for preventing freezing and cracking according to claim 1, characterized in that: The connecting ring (25) has a flange groove inside, and the flange groove inside the connecting ring (25) matches the size of the fixed flange (26).

6. The evaporator piping structure for preventing freezing and cracking according to claim 1, characterized in that: The connecting ring 2 (27) has a flange groove inside, and the flange groove inside the connecting ring 2 (27) matches the size of the fixed flange 2 (28).

7. The evaporator piping structure for preventing freezing and cracking according to claim 2, characterized in that: The side of the pipe (21) is provided with a slot, and the slot on the side of the pipe (21) matches the size of the vibration damping ring (37).

8. The evaporator piping structure for preventing freezing and cracking according to claim 1, characterized in that: The side of the pipe (21) is provided with a slot, and the slot on the side of the pipe (21) matches the size of the outer connecting ring (22).

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