Gas-liquid separation heat exchange device
The structural design of the gas-liquid separation heat exchange device, including the guide tube, baffle column and U-shaped exhaust pipe, solves the problem of poor heat exchange effect in the existing refrigeration system, achieves full evaporation and state regulation of the refrigerant, and improves the reliability and cooling capacity of the refrigeration system.
Patent Information
- Application Number
- CN202422381251.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In existing refrigeration systems, the heat exchange device has a simple structure, resulting in poor heat exchange effect and unable to effectively avoid the impact of return steam carrying liquid on the compressor, affecting the reliability and cooling capacity of the refrigeration system.
A gas-liquid separation heat exchange device is used to limit the flow range of the gaseous refrigerant through a guide tube, allowing it to fully exchange heat with the liquid refrigerant in the heat exchange pipe. Combined with flow-blocking columns, heat dissipation fins and U-shaped exhaust pipes, the heat exchange efficiency is improved, and the lubricating oil is recovered through the Bernoulli principle to prevent the oil from affecting the system operation.
It improves the evaporation effect of the refrigerant, avoids liquid in the compressor, enhances the superheat or subcooling adjustment ability of the refrigeration system, and improves the cooling capacity and system reliability.
Smart Images
Figure CN223319315U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a gas-liquid separation heat exchange device, which is applicable to the technical field of refrigeration systems. Background Art
[0002] The refrigeration system achieves heat exchange with the outside world by driving the refrigerant to circulate continuously in the system and changing its state during the flow. After the low-temperature liquid refrigerant evaporates and vaporizes in the evaporator, it turns into gaseous refrigerant and returns to the compressor. However, in actual use, the refrigeration system often encounters situations where the refrigerant is not completely evaporated, resulting in liquid in the returned steam, or the refrigeration system is used to cool high-temperature facilities, resulting in the return steam temperature being too high. In such cases, the steam directly returning to the compressor can cause damage to the compressor. Therefore, a heat exchange device is usually installed in the existing refrigeration system to exchange heat between the gaseous refrigerant returned from the evaporator and the liquid refrigerant output from the condenser in order to adjust the steam state and prevent it from affecting the compressor. However, the structure of the existing heat exchange device is relatively simple. It simply extends the pipe that transports the liquid refrigerant into the pipe that transports the gaseous refrigerant, allowing the two to transfer heat. The heat exchange effect is poor, and it is difficult to completely avoid the impact of the poor state of the return steam on the compressor. Utility Model Content
[0003] In order to solve the defects of the above-mentioned prior art, the utility model proposes a gas-liquid separation heat exchange device.
[0004] The technical solution adopted by the utility model is a gas-liquid separation heat exchange device, comprising a tank body with an air inlet and an air outlet, a heat exchange pipe arranged in the tank body and used for heat exchange between the medium therein and the medium in the tank body, the heat exchange pipe having a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively extended to the outside of the tank body, the gas-liquid separation heat exchange device also includes a guide tube arranged in the tank body and connected to the inner wall of the tank body at one end, the heat exchange pipe is arranged on the inner side of the guide tube, the air inlet and the air outlet are opened on the inner wall of the tank body, and the air inlet and the air outlet are respectively located on the inner and outer sides of the guide tube. Specifically, the air inlet and the air outlet are connected to the output end of the evaporator and the input end of the compressor respectively, and the liquid inlet and the liquid outlet are connected to the output end of the condenser and the input end of the evaporator respectively; the flow range of the gaseous refrigerant input from the air inlet is limited to the periphery of the heat exchange pipe by the guide tube, so that the gaseous refrigerant can fully exchange heat with the liquid refrigerant in the heat exchange pipe during the flow process, thereby improving the heat exchange effect, not only making the returned refrigerant fully evaporate and avoiding liquid in the compressor; but also making it convenient to adjust the state of the gaseous or liquid refrigerant, thereby improving the ability to adjust the overheating or subcooling of the refrigeration system, facilitating increasing the cooling capacity of the refrigeration system and ensuring the reliability of the system.
[0005] Optionally, the gas-liquid separation heat exchange device further includes a flow-blocking column disposed inside the guide tube. An airflow channel for airflow is formed between the inner wall of the guide tube and the outer wall of the flow-blocking column. The heat exchange pipe is spirally coiled within the airflow channel, and the air inlet is connected to the airflow channel. The addition of the flow-blocking column further limits the range of gas flow, confining the returning gaseous refrigerant to the cylindrical airflow channel formed between the guide tube and the flow-blocking column. Furthermore, the heat exchange pipe is spirally coiled within this airflow channel, allowing the gaseous refrigerant to fully contact the heat exchange pipe, further improving the heat exchange effect.
[0006] Optionally, the gas-liquid separation device further includes a diverter tube disposed within the guide tube and connected at one end to the air inlet. A space is defined between the inner wall of the guide tube and the outer wall of the diverter tube for the heat exchange pipe to be spirally wound therein. The sidewall of the diverter tube is provided with a plurality of air holes connecting the inner cavity of the diverter tube with the space. By spirally winding the heat exchange pipe between the guide tube and the diverter tube, and by evenly and dispersedly blowing the gaseous refrigerant introduced from the air inlet into the heat exchange pipe through the air holes in the diverter tube, the gaseous refrigerant can fully contact the heat exchange pipe, further improving the heat exchange effect.
[0007] Furthermore, a number of cooling fins are provided on the outer wall of the heat exchange pipe, and there is a channel for air flow between every two adjacent cooling fins. Specifically, the cooling fins are configured as copper sheets, and each cooling fin is relatively perpendicular to the outer wall of the heat exchange pipe where it is located. The heat transfer is guided by the cooling fins, thereby improving the heat exchange effect of the heat exchange device.
[0008] Optionally, the gas-liquid separation device also includes a U-shaped exhaust pipe disposed within the tank body, an oil suction hole provided at the bottom of the exhaust pipe, one end of the exhaust pipe being connected to the air outlet, the other end of the exhaust pipe being located within the tank body and extending to the outside of the guide tube, and the bottom of the exhaust pipe extending to the bottom of the tank body. The gas within the tank body is discharged through the U-shaped exhaust pipe, and at the same time, the lubricating oil separated from the bottom of the tank body is sucked into the exhaust pipe from the oil suction hole according to the Bernoulli principle, and the lubricating oil is allowed to flow back into the compressor along with the gas refrigerant. This facilitates limiting the amount of oil in the return air by controlling the size of the oil suction hole, thereby preventing the return air from carrying a large amount of oil, which would affect the normal operation of the refrigeration system. In addition, the exhaust pipe can extend the flow time of the refrigerant within the tank body, and the U-shaped structure of the exhaust pipe can enable the gaseous refrigerant to form convection during its flow within the tank body, thereby fully mixing the refrigerant vapors at various locations within the tank body, further improving the heat exchange effect.
[0009] Furthermore, the other end of the exhaust pipe extends to a position close to one end of the guide tube, preventing the gaseous refrigerant from flowing directly into the exhaust pipe after flowing out from the other end of the guide tube, extending the flow time of the refrigerant in the tank body, and facilitating the formation of convection to evenly mix the refrigerant in various parts of the tank body.
[0010] Optionally, an oil return port is provided at the bottom of the tank body, through which the lubricating oil separated from the refrigerant is recovered and then fed back to the compressor, thereby avoiding the problem of liquid in the return air of the compressor. It is also convenient to use the oil return port as a sewage outlet to discharge impurities in the refrigeration system.
[0011] Due to the application of the above technical solution, the present invention has the following advantages over the prior art:
[0012] The gas-liquid separation heat exchange device in the utility model limits the flow range of the gaseous refrigerant input from the air inlet to the periphery of the heat exchange pipe through the guide tube, so that the gaseous refrigerant can fully exchange heat with the liquid refrigerant in the heat exchange pipe during the flow process, thereby improving the heat exchange effect. It can not only make the returned refrigerant fully evaporate and avoid liquid in the compressor; it can also facilitate the adjustment of the state of the gaseous or liquid refrigerant, thereby improving the ability to adjust the overheating or subcooling of the refrigeration system, facilitating the improvement of the cooling capacity of the refrigeration system and ensuring the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar structures or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:
[0014] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;
[0015] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the tank in the embodiment shown;
[0016] Figure 3 This is a schematic structural diagram of Example 2 of the present utility model;
[0017] Figure 4 yes Figure 3 A schematic diagram of the internal structure of the tank in the embodiment shown;
[0018] Figure 5 This is a schematic structural diagram of Example 3 of the present utility model;
[0019] The following are the descriptions of the reference numerals:
[0020] 1. Tank body; 11. Air inlet; 12. Air outlet; 13. Oil return port; 2. Heat exchange pipe; 21. Liquid inlet; 22. Liquid outlet; 3. Guide tube; 4. Flow blocking column; 41. Air flow channel; 5. Diverter pipe; 51. Accommodation space; 52. Air hole; 6. Exhaust pipe; 61. Oil suction hole. DETAILED DESCRIPTION
[0021] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.
[0022] In the description of the present invention, it should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as there is no conflict between them.
[0023] Example 1
[0024] Reference Attachment Figure 1-2 The gas-liquid separation heat exchange device in this embodiment includes a tank body 1 having an air inlet 11 and an air outlet 12, a heat exchange pipe 2 arranged in the tank body 1 and used for heat exchange between the medium therein and the medium in the tank body 1, the heat exchange pipe 2 has a liquid inlet 21 and a liquid outlet 22, and the liquid inlet 21 and the liquid outlet 22 are respectively extended to the outside of the tank body 1, the gas-liquid separation heat exchange device also includes a guide tube 3 arranged in the tank body 1 and connected to the inner wall of the tank body 1 at one end, the heat exchange pipe 2 is arranged on the inner side of the guide tube 3, the air inlet 11 and the air outlet 12 are opened on the inner wall of the tank body 1, and the air inlet 11 and the air outlet 12 are respectively located on the inner and outer sides of the guide tube 3. Specifically, the air inlet 11 and the air outlet 12 are connected to the output end of the evaporator and the input end of the compressor respectively, and the liquid inlet 21 and the liquid outlet 22 are connected to the output end of the condenser and the input end of the evaporator respectively; the flow range of the gaseous refrigerant input by the air inlet 11 is limited to the periphery of the heat exchange pipe 2 through the guide tube 3, so that the gaseous refrigerant can fully exchange heat with the liquid refrigerant in the heat exchange pipe 2 during the flow process, thereby improving the heat exchange effect, not only making the returned refrigerant fully evaporate and avoiding liquid in the compressor; but also facilitating the adjustment of the state of the gaseous or liquid refrigerant, thereby improving the ability to adjust the overheating or subcooling of the refrigeration system, facilitating the improvement of the refrigeration capacity of the refrigeration system and ensuring the reliability of the system.
[0025] In a more preferred embodiment, the gas-liquid separation heat exchange device further includes a flow-blocking column 4 disposed inside the guide tube 3. An airflow channel 41 for airflow is formed between the inner wall of the guide tube 3 and the outer wall of the flow-blocking column 4. The heat exchange pipe 2 is spirally wound within the airflow channel 41, and the air inlet 11 is connected to the airflow channel 41. The addition of the flow-blocking column 4 further limits the gas flow range, so that the returning gaseous refrigerant is confined to the cylindrical airflow channel 41 formed between the guide tube 3 and the flow-blocking column 4. The heat exchange pipe 2 is spirally wound within the airflow channel 41, so that the gaseous refrigerant can fully contact the heat exchange pipe 2, further improving the heat exchange effect.
[0026] In a more preferred embodiment, a plurality of heat dissipation fins (not shown in the drawings) are provided on the outer wall of the heat exchange pipe 2, and there is a channel for air flow between every two adjacent heat dissipation fins. Specifically, the heat dissipation fins are configured as copper sheets, and each heat dissipation fin is relatively perpendicular to the outer wall of the heat exchange pipe 2 where it is located. Heat transfer is guided by the heat dissipation fins, thereby improving the heat exchange effect of the heat exchange device.
[0027] In a more preferred embodiment, the gas-liquid separation device further includes a U-shaped exhaust pipe 6 disposed within the tank body 1 and an oil suction hole 61 defined at the bottom of the exhaust pipe 6. One end of the exhaust pipe 6 is connected to the gas outlet 12, while the other end of the exhaust pipe 6 is located within the tank body 1 and extends to the outside of the guide tube 3. The bottom of the exhaust pipe 6 extends to the bottom of the tank body 1. The gas within the tank body 1 is discharged through the U-shaped exhaust pipe 6. Simultaneously, the lubricating oil separated from the bottom of the tank body 1 is drawn into the exhaust pipe 6 through the oil suction hole 61 according to the Bernoulli principle, and the lubricating oil is returned to the compressor along with the gaseous refrigerant. This facilitates controlling the size of the oil suction hole 61 to limit the amount of oil in the return gas, thereby preventing the return gas from carrying a large amount of oil, which could affect the normal operation of the refrigeration system. Furthermore, the exhaust pipe 6 prolongs the flow time of the refrigerant within the tank body 1. The U-shaped structure of the exhaust pipe 6 also allows convection of the gaseous refrigerant during its flow within the tank body 1, resulting in thorough mixing of the refrigerant vapor throughout the tank body 1 and further improving the heat exchange effect.
[0028] In a more preferred embodiment, the other end of the exhaust pipe 6 extends to a position close to one end of the guide tube 3, so as to prevent the gaseous refrigerant from flowing out from the other end of the guide tube 3 and directly flowing into the exhaust pipe 6, thereby extending the flow time of the refrigerant in the tank body 1 and facilitating the formation of convection to evenly mix the refrigerant in various places in the tank body 1.
[0029] Example 2
[0030] Reference Attachment Figure 3-4 This embodiment differs from Embodiment 1 in that the gas-liquid separation device further includes a diverter tube 5 disposed inside the guide tube 3 and connected at one end to the air inlet 11. A receiving space 51 for the helically wound heat exchange pipe 2 is formed between the inner wall of the guide tube 3 and the outer wall of the diverter tube 5. The sidewall of the diverter tube 5 is provided with a plurality of air holes 52 connecting the inner cavity of the diverter tube 5 with the receiving space 51. By helically winding the heat exchange pipe 2 between the guide tube 3 and the diverter tube 5, and by evenly and dispersedly blowing the gaseous refrigerant introduced from the air inlet 11 toward the heat exchange pipe 2 through the air holes 52 in the diverter tube 5, the gaseous refrigerant can fully contact the heat exchange pipe 2, further improving the heat exchange effect.
[0031] Example 3
[0032] Reference Attachment Figure 5The difference between this embodiment and embodiment 1 is that an oil return port 13 is provided at the bottom of the tank body 1, which facilitates the recovery of lubricating oil separated from the refrigerant through the oil return port 13 and then returns it to the compressor. There is no need to set a U-shaped exhaust pipe in the tank body 1 to recover the oil, which reduces the difficulty of setting and completely avoids the problem of liquid in the return air of the compressor. At the same time, it is also convenient to use the oil return port 13 as a sewage outlet to discharge impurities in the refrigeration system.
[0033] Due to the application of the above technical solution, the present invention has the following advantages over the prior art:
[0034] The gas-liquid separation heat exchange device in the utility model limits the flow range of the gaseous refrigerant input from the air inlet to the periphery of the heat exchange pipe through the guide tube, so that the gaseous refrigerant can fully exchange heat with the liquid refrigerant in the heat exchange pipe during the flow process, thereby improving the heat exchange effect. It can not only make the returned refrigerant fully evaporate and avoid liquid in the compressor; it can also facilitate the adjustment of the state of the gaseous or liquid refrigerant, thereby improving the ability to adjust the overheating or subcooling of the refrigeration system, facilitating the improvement of the cooling capacity of the refrigeration system and ensuring the reliability of the system.
[0035] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.
Claims
1. A gas-liquid separation heat exchange device, comprising a tank body (1) having an air inlet (11) and an air outlet (12), a heat exchange pipe (2) arranged in the tank body (1) and used for exchanging heat between the medium in the tank body (1) and the medium in the tank body (1), the heat exchange pipe (2) having a liquid inlet (21) and a liquid outlet (22), and the liquid inlet (21) and the liquid outlet (22) are respectively provided to the outside of the tank body (1), characterized in that: The gas-liquid separation heat exchange device further comprises a guide tube (3) arranged in the tank body (1) and having one end connected to the inner wall of the tank body (1); the heat exchange pipe (2) is arranged on the inner side of the guide tube (3); the air inlet (11) and the air outlet (12) are opened on the inner wall of the tank body (1), and the air inlet (11) and the air outlet (12) are respectively located on the inner and outer sides of the guide tube (3).
2. The gas-liquid separation heat exchange device according to claim 1, characterized in that: The gas-liquid separation heat exchange device further comprises a flow-blocking column (4) arranged on the inner side of the flow guide tube (3); an air flow channel (41) for air flow to pass through is formed between the inner wall of the flow guide tube (3) and the outer wall of the flow-blocking column (4); the heat exchange pipe (2) is spirally wound and arranged in the air flow channel (41), and the air inlet (11) is connected to the air flow channel (41).
3. The gas-liquid separation heat exchange device according to claim 1, characterized in that: The gas-liquid separation heat exchange device further comprises a diverter pipe (5) arranged on the inner side of the guide tube (3) and having one end connected to the air inlet (11); an accommodating space (51) for the heat exchange pipe (2) to be spirally wound therein is formed between the inner wall of the guide tube (3) and the outer wall of the diverter pipe (5); and a plurality of air holes (52) are provided on the side wall of the diverter pipe (5) for connecting the inner cavity of the diverter pipe (5) and the accommodating space (51).
4. The gas-liquid separation heat exchange device according to claim 1, characterized in that: A plurality of heat dissipation fins are provided on the outer wall of the heat exchange pipe (2), and a channel for air flow is provided between each two adjacent heat dissipation fins.
5. The gas-liquid separation heat exchange device according to claim 1, characterized in that: The gas-liquid separation heat exchange device further comprises a U-shaped exhaust pipe (6) arranged in the tank body (1), and an oil suction hole (61) opened at the bottom of the exhaust pipe (6); one end of the exhaust pipe (6) is connected to the gas outlet (12), the other end of the exhaust pipe (6) extends to the outside of the guide tube (3), and the bottom of the exhaust pipe (6) extends to the bottom of the tank body (1).
6. The gas-liquid separation heat exchange device according to claim 5, characterized in that: The other end of the exhaust pipe (6) extends to a position close to one end of the guide tube (3).
7. The gas-liquid separation heat exchange device according to claim 1, characterized in that: An oil return port (13) is provided at the bottom of the tank body (1).