A water chiller plate tube evaporator

Abstract

The utility model discloses a cold water set pipe plate type evaporator relates to cold water set evaporator technical field, and its technical scheme is: including evaporator tube shell, evaporator tube shell bottom is equipped with refrigerant import fixedly, and the top of evaporator tube shell is equipped with refrigerant evaporation export fixedly, and the beneficial effect of a kind of cold water set pipe plate type evaporator is: through innovative modularization design, pipe plate type heat exchange subassembly is designed as detachable structure, when corrosion, fouling or damage appear to heat exchange pipe, heat exchange plate and other components, operating personnel only need to unscrew left cover assembly, right cover assembly and the fastening bolt of evaporator tube shell, can extract pipe plate type heat exchange subassembly, realize the disassembly and replacement of single heat exchange pipe and heat exchange plate, do not need to disassemble entire evaporator, this design greatly simplifies maintenance process, significantly reduces maintenance cost, effectively improves the maintainability and service life of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of chiller evaporators, specifically to a tube sheet evaporator for chillers. Background Technology

[0002] As the core heat exchange equipment, the performance of the tube sheet evaporator in a chiller unit directly affects the energy efficiency and stability of the entire refrigeration system. Traditional tube sheet evaporators typically have heat exchange copper tubes fixedly installed inside the evaporator shell, and heat exchange efficiency is improved by processing fins on the surface of the copper tubes or using special coatings.

[0003] When existing evaporator heat exchange components are corroded, scaled, or damaged, the copper tubes are tightly integrated with the shell and other components, making direct disassembly and replacement impossible. Often, the entire evaporator needs to be disassembled, resulting in high maintenance costs and long cycles, which seriously affects the normal operation and service life of the equipment. Utility Model Content

[0004] To address this issue, this utility model provides a tube sheet evaporator for a chiller unit. The tube sheet heat exchange components are detachable, which solves the problem that when the heat exchange components of the evaporator are corroded, scaled, or damaged, they cannot be directly disassembled and replaced because the copper tubes are tightly connected to the shell and other components, often requiring the entire evaporator to be disassembled.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tube-plate evaporator for a chiller unit, comprising an evaporator shell, a refrigerant inlet fixedly disposed at the bottom of the evaporator shell, a refrigerant evaporation outlet fixedly disposed at the top of the evaporator shell, a left sealing cap assembly and a right sealing cap assembly respectively disposed on both sides of the evaporator shell, a tube-plate heat exchange assembly disposed inside the evaporator shell, the left sealing cap assembly comprising a left sealing cap, the left sealing cap having a heat exchange medium distribution chamber and a heat exchange medium return chamber disposed inside the left sealing cap, a heat exchange medium inlet fixedly disposed on one side of the heat exchange medium distribution chamber, and a heat exchange medium return chamber having a... The heat exchange medium outlet is fixedly provided on the side. A left sealing ring is embedded on one side of the left cover, and multiple left heat exchange tube sealing rings are embedded on one side of the left cover. The right cover assembly includes a right sealing ring embedded on one side of the right cover, and multiple right heat exchange tube sealing rings embedded on one side of the right cover. The tube sheet heat exchange assembly includes two connecting plates. A side abutment is fixedly provided on one side of each of the two connecting plates. Multiple heat exchange tube insertion holes are opened inside each of the two connecting plates. Heat exchange tubes are inserted into the multiple heat exchange tube insertion holes. Multiple heat exchange plates are opened outside the heat exchange tubes. A central abutment is fixedly inserted into the multiple heat exchange plates.

[0006] Preferably, the two ends of the evaporator shell are fixedly connected to the left and right sealing caps respectively by fastening bolts.

[0007] Preferably, the connecting plate is located inside the evaporator shell and is sealed to the evaporator shell.

[0008] Preferably, one end of the connecting disc contacts one side wall of the left cover and is sealed and connected by the left sealing ring.

[0009] Preferably, the other end of the connecting plate contacts one side wall of the right cover and is sealed to the right side wall of the right cover by a right sealing ring.

[0010] Preferably, the side abutment post is in close contact with the adjacent middle abutment post, and the adjacent middle abutment posts are also in close contact with each other.

[0011] Preferably, one end of the heat exchange tube is in contact with the sealing ring of the left heat exchange tube, and the other end of the heat exchange tube is in contact with the sealing ring of the right heat exchange tube.

[0012] Preferably, the heat exchange plate is sleeved on the outside of multiple heat exchange tubes and slidably connected to the multiple heat exchange tubes.

[0013] The present invention has the following advantages:

[0014] Through innovative modular design, the tube sheet heat exchanger assembly is designed as a detachable structure. When components such as heat exchange tubes and heat exchange plates are corroded, scaled, or damaged, operators only need to unscrew the fastening bolts between the left and right sealing components and the evaporator shell to pull out the tube sheet heat exchanger assembly. This allows for the disassembly and replacement of individual heat exchange tubes and heat exchange plates without disassembling the entire evaporator. This design greatly simplifies the maintenance process, significantly reduces maintenance costs, and effectively improves the maintainability and service life of the equipment.

[0015] By cooperating with the side support columns, middle support columns, sealing rings, heat exchange tubes, and heat exchange plates, a stable internal structural system is constructed. The side support columns and middle support columns are tightly connected to form a rigid support frame. Combined with the positioning constraint of the heat exchange tubes by the sealing rings and the sliding connection design between the heat exchange plates and heat exchange tubes, the tube sheet heat exchange assembly can work together to maintain its position when subjected to various external forces such as external pressure, fluid impact, and vibration. This prevents relative movement or misalignment and ensures the integrity of the heat exchange structure, thereby ensuring that the evaporator can carry out heat exchange efficiently and stably, and improving the energy efficiency and stability of the entire refrigeration system. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 A schematic diagram of the overall structure of this utility model;

[0019] Figure 2 A three-dimensional view of the evaporator shell segmentation state provided for this utility model;

[0020] Figure 3 Exploded perspective view of the tube sheet heat exchanger assembly provided by this utility model;

[0021] Figure 4 A partial sectional perspective view of the left sealing component provided by this utility model;

[0022] Figure 5 Provided by this utility model Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 A partial sectional perspective view of the right sealing component provided by this utility model;

[0024] Figure 7 Provided by this utility model Figure 6 Enlarged view of section B in the middle.

[0025] In the diagram: 1 Evaporator shell, 2 Refrigerant inlet, 3 Refrigerant evaporation outlet, 4 Left cover assembly, 41 Left cover, 42 Heat exchange medium inlet, 43 Heat exchange medium distribution chamber, 44 Heat exchange medium return chamber, 45 Heat exchange medium outlet, 46 Left sealing ring, 47 Left heat exchange tube sealing ring, 5 Right cover assembly, 51 Right cover, 52 Right sealing ring, 53 Right heat exchange tube sealing ring, 6 Tube sheet heat exchange assembly, 61 Connecting plate, 62 Side support column, 63 Heat exchange tube insertion hole, 64 Heat exchange tube, 65 Heat exchange plate, 66 Middle support column. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] See attached document Figure 1 - Appendix Figure 7 This utility model provides a tube-plate evaporator for a chiller unit, including an evaporator shell 1, a refrigerant inlet 2 fixedly disposed at the bottom of the evaporator shell 1, a refrigerant evaporation outlet 3 fixedly disposed at the top of the evaporator shell 1, a left sealing cap assembly 4 and a right sealing cap assembly 5 respectively disposed on both sides of the evaporator shell 1, and a tube-plate heat exchange assembly 6 disposed inside the evaporator shell 1. The left sealing cap assembly 4 includes a left sealing cap 41, inside which are a heat exchange medium distribution chamber 43 and a heat exchange medium return chamber 44. A heat exchange medium inlet 42 is fixedly disposed on one side of the heat exchange medium distribution chamber 43, and a heat exchange medium outlet 45 is fixedly disposed on one side of the heat exchange medium return chamber 44. A left sealing ring 46 is embedded on one side of the left cover 41, and multiple left heat exchange tube sealing rings 47 are embedded on one side of the left cover 41. The right cover assembly 5 includes a right sealing ring 52 embedded on one side of the right cover 51, and multiple right heat exchange tube sealing rings 53 embedded on one side of the right cover 51. The tube sheet heat exchange assembly 6 includes two connecting plates 61. A side support post 62 is fixedly provided on one side of each of the two connecting plates 61. Multiple heat exchange tube insertion holes 63 are opened inside each of the two connecting plates 61. Heat exchange tubes 64 are inserted into the multiple heat exchange tube insertion holes 63. Multiple heat exchange plates 65 are opened outside the heat exchange tubes 64. A central support post 66 is fixedly inserted into the multiple heat exchange plates 65.

[0028] In this implementation scheme, in order to enable the evaporator to disassemble and replace the internal heat exchange tubes 64 and heat exchange plates 65, when the tube sheet heat exchange assembly 6 needs to be disassembled and maintained, the operator only needs to use tools to unscrew the fastening bolts at the connection between the left cover assembly 4 and the right cover assembly 5 and the evaporator tube shell 1, so as to release the fixed connection between the left cover 41 and the right cover 51 and the evaporator tube shell 1. At this time, the tube sheet heat exchange assembly 6 loses its external restraint and can be easily pulled out from the evaporator tube shell 1. Since the heat exchange plate 65 is sleeved on the outside of the heat exchange tube 64 and is slidably connected to the heat exchange tube 64, and the heat exchange tube insertion hole 63 on the connecting plate 61 is inserted into the heat exchange tube 64, the heat exchange tube 64 can be easily pulled out from the heat exchange tube insertion hole 63 of the connecting plate 61, thereby realizing the individual disassembly and replacement of the heat exchange tube 64 and the heat exchange plate 65. This modular design greatly simplifies the maintenance process, significantly reduces maintenance costs and time costs, and effectively improves the maintainability and service life of the equipment.

[0029] To achieve a seal at the connection points between the evaporator shell 1, left cover 41, right cover 51, and connecting plate 61, preventing leakage during use, this device employs the following technical solution: Both ends of the evaporator shell 1 are fixedly connected to the left cover 41 and right cover 51 respectively using fastening bolts. The connecting plate 61 is located inside the evaporator shell 1 and is sealed to it. One end of the connecting plate 61 contacts one side wall of the left cover 41 and is sealed through a left sealing ring 46. The other end of the connecting plate 61 contacts one side wall of the right cover 51 and is sealed through a right sealing ring 52. Regarding the sealing connection, both ends of the evaporator shell 1 are fixedly connected to the left cover 41 and right cover 51 respectively using fastening bolts. The pre-tightening force applied by the fastening bolts ensures that the left cover 41 and right cover 51 are tightly fitted to the evaporator shell 1. The left cover 41, with the aid of the left sealing ring 46… The left cover 51 is tightly fitted with one end of the connecting plate 61 and one end of the evaporator tube shell 1. At the same time, multiple left heat exchange tube sealing rings 47 are embedded on one side of the left cover 41 and tightly fitted with one end of multiple heat exchange tubes 64 respectively. The left sealing ring 46 and the left heat exchange tube sealing ring 47 undergo elastic deformation to fill the tiny gaps between the components, effectively preventing refrigerant and heat exchange medium leakage. The right cover 51 is tightly fitted with one end of the connecting plate 61 and one end of the evaporator tube shell 1 with the help of the right sealing ring 52, while multiple right heat exchange tube sealing rings 53 are in close contact with the other end of the heat exchange tube 64. Its sealing principle is the same as that of the left cover 41. The sealing structures of the left and right covers work together to tightly wrap the left and right heat exchange tube sealing rings of the heat exchange tube 64, further strengthening the sealing performance at the connection, ensuring that the entire evaporator maintains good sealing performance during operation, avoiding refrigerant and heat exchange medium leakage, and providing reliable protection for the safe, stable and efficient operation of the equipment.

[0030] To ensure that the components of the tube sheet heat exchanger 6 do not move when the left and right covers 41 and 51 abut against it from both sides, the device employs the following technical solution: the side abutment column 62 is in close contact with the adjacent middle abutment column 66, and the adjacent middle abutment columns 66 also maintain close contact with each other; one end of the heat exchange tube 64 is in contact with the left heat exchange tube sealing ring 47, and the other end of the heat exchange tube 64 is in contact with the right heat exchange tube sealing ring 53; the heat exchange plate 65 is sleeved on the outside of the multiple heat exchange tubes 64 and slidably connected to the multiple heat exchange tubes 64; the side abutment column 62 is in close contact with the adjacent middle abutment column 66, and the adjacent middle abutment columns 66 also maintain close contact with each other, forming a stable support frame structure. This frame acts like a rigid network, connecting... The tube sheet heat exchanger assembly 64, including the receiving plate 61, heat exchange plate 65, and heat exchange tube 64, is closely connected, enabling the entire assembly to work together under external pressure. This prevents relative movement or misalignment of internal components and ensures the integrity of the heat exchange structure. Through the cooperation of the side support column 62, the middle support column 66, the sealing ring, and the heat exchange tube 64 and heat exchange plate 65, the pressure applied by the left cover 41 and right cover 51 is evenly distributed to each component of the tube sheet heat exchanger assembly 6. This allows the entire assembly to withstand various external forces during evaporator operation, such as the flow pressure of the refrigerant and heat exchange medium, the thermal stress caused by temperature changes, and vibrations during equipment operation. This maintains a stable working state, ensuring efficient and reliable operation of the evaporator and extending the service life of the equipment.

[0031] The usage process of this utility model is as follows: In actual use, during the evaporation heat exchange process, the heat exchange medium flows into the heat exchange medium distribution chamber 43 through the heat exchange medium inlet 42. Due to the special structural design of the distribution chamber, the heat exchange medium can be evenly distributed to multiple heat exchange tubes 64 at the bottom. The heat exchange tubes 64 and the heat exchange plates 65 sleeved on the outside together form a high-efficiency heat exchange structure, which greatly increases the heat exchange area and significantly improves the heat exchange efficiency. During the flow of the heat exchange medium in the heat exchange tubes 64, it fully exchanges heat with the refrigerant outside the tubes. Then, it is turned by the right cover 51 and flows into multiple heat exchange tubes 64 at the top. Finally, it is collected in the heat exchange medium return chamber 44 and flows out from the heat exchange medium outlet 45. At the same time, the refrigerant enters the interior of the evaporator shell 1 through the refrigerant inlet 2 and fully contacts the outer surface of the heat exchange tubes 64 and the heat exchange plates 65. It absorbs the heat transferred by the heat exchange medium and undergoes evaporation phase change. The gaseous refrigerant is discharged from the refrigerant evaporation outlet 3, completing the key link of the evaporator in the refrigeration cycle.

[0032] When the tube sheet heat exchanger assembly 6 needs to be disassembled and maintained, the operator only needs to use tools to unscrew the fastening bolts at the connection between the left cover assembly 4, the right cover assembly 5 and the evaporator tube shell 1, so as to release the fixed connection between the left cover 41, the right cover 51 and the evaporator tube shell 1. At this time, the tube sheet heat exchanger assembly 6 loses its external restraint and can be easily pulled out from the evaporator tube shell 1. Since the heat exchange plate 65 is sleeved on the outside of the heat exchange tube 64 and is slidably connected to the heat exchange tube 64, and the heat exchange tube insertion hole 63 on the connecting plate 61 is inserted into the heat exchange tube 64, the heat exchange tube 64 can be easily pulled out from the heat exchange tube insertion hole 63 of the connecting plate 61, thereby realizing the individual disassembly and replacement of the heat exchange tube 64 and the heat exchange plate 65. This modular design greatly simplifies the maintenance process, significantly reduces maintenance costs and time costs, and effectively improves the maintainability and service life of the equipment.

[0033] Regarding the sealing connection, both ends of the evaporator shell 1 are fixedly connected to the left cover 41 and the right cover 51 respectively by fastening bolts. The pre-tightening force applied by the fastening bolts ensures that the left cover 41 and the right cover 51 are tightly fitted to the evaporator shell 1. The left cover 41 is tightly fitted to one end of the connecting plate 61 and one end of the evaporator shell 1 by means of the left sealing ring 46. At the same time, multiple left heat exchanger tube sealing rings 47 are embedded on one side of the left cover 41 and are tightly fitted to one end of multiple heat exchanger tubes 64 respectively. The left sealing rings 46 and the left heat exchanger tube sealing rings 47 undergo elastic deformation, filling the tiny gaps between the components and effectively blocking the gaps. In case of refrigerant and heat exchange medium leakage, the right cover 51 is tightly fitted with one end of the connecting plate 61 and one end of the evaporator tube shell 1 by means of the right sealing ring 52, while multiple right heat exchange tube sealing rings 53 are in close contact with the other end of the heat exchange tube 64. Its sealing principle is the same as that of the left cover 41. The sealing structures of the left and right covers work together, and together with the left and right heat exchange tube sealing rings that tightly wrap the heat exchange tube 64, the sealing performance at the connection is further enhanced, ensuring that the entire evaporator maintains good sealing performance during operation, avoiding refrigerant and heat exchange medium leakage, and providing a reliable guarantee for the safe, stable and efficient operation of the equipment.

[0034] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A tube-plate evaporator for a water chiller unit, comprising an evaporator tube shell (1), characterized in that: The evaporator shell (1) is fixedly provided with a refrigerant inlet (2) at the bottom and a refrigerant evaporation outlet (3) at the top. The evaporator shell (1) is provided with a left cover assembly (4) and a right cover assembly (5) on both sides. The evaporator shell (1) is provided with a tube sheet heat exchange assembly (6) inside. The left cover assembly (4) includes a left cover (41). The left cover (41) is provided with a heat exchange medium distribution chamber (43) and a heat exchange medium return chamber (44) inside. A heat exchange medium inlet (42) is fixedly provided on one side of the heat exchange medium distribution chamber (43), and a heat exchange medium outlet (45) is fixedly provided on one side of the heat exchange medium return chamber (44). A left sealing ring (45) is embedded on one side of the left cover (41). 6) The left cover (41) is provided with a plurality of left heat exchange tube sealing rings (47) embedded on one side. The right cover assembly (5) includes a right cover (51) with a right sealing ring (52) embedded on one side. The right cover (51) is provided with a plurality of right heat exchange tube sealing rings (53) embedded on one side. The tube sheet heat exchange assembly (6) includes two connecting plates (61). Each of the two connecting plates (61) is provided with a side abutment (62) fixed on one side. Each of the two connecting plates (61) is provided with a plurality of heat exchange tube insertion holes (63). Each of the plurality of heat exchange tube insertion holes (63) is provided with a heat exchange tube (64). Each of the heat exchange tubes (64) is provided with a plurality of heat exchange plates (65). Each of the plurality of heat exchange plates (65) is provided with a central abutment (66) fixedly inserted inside.

2. The tube sheet evaporator for a chiller unit according to claim 1, characterized in that: The two ends of the evaporator shell (1) are fixedly connected to the left cover (41) and the right cover (51) respectively by fastening bolts.

3. The tube sheet evaporator for a chiller unit according to claim 1, characterized in that: The connecting plate (61) is located inside the evaporator shell (1) and is sealed to the evaporator shell (1).

4. A tube sheet evaporator for a chiller unit according to claim 1, characterized in that: One end of the connecting plate (61) contacts the side wall of the left cover (41) and is sealed and connected by the left sealing ring (46).

5. A tube sheet evaporator for a chiller unit according to claim 1, characterized in that: The other end of the connecting plate (61) contacts one side wall of the right cover (51) and is sealed to the right side wall of the right cover (51) by the right sealing ring (52).

6. A tube sheet evaporator for a chiller unit according to claim 1, characterized in that: The side abutment post (62) is in close contact with the adjacent middle abutment post (66), and the adjacent middle abutment posts (66) are also in close contact with each other.

7. A tube sheet evaporator for a chiller unit according to claim 1, characterized in that: One end of the heat exchange tube (64) is in contact with the left heat exchange tube sealing ring (47), and the other end of the heat exchange tube (64) is in contact with the right heat exchange tube sealing ring (53).

8. A tube sheet evaporator for a chiller unit according to claim 1, characterized in that: The heat exchange plate (65) is sleeved on the outside of the multiple heat exchange tubes (64) and is slidably connected to the multiple heat exchange tubes (64).

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