Heat exchange device for water chilling unit

Abstract

The heat exchange device comprises a shell, the top of the shell is fixedly connected with a liquid inlet pipe, the bottom of the side, away from the liquid inlet pipe, of the shell is fixedly connected with a liquid outlet pipe, one side of the shell is fixedly connected with a rear end cover, and the other side of the shell is fixedly connected with a front end cover. The inner side of the front end cover is fixedly connected with a partition plate, the inner side of the shell is fixedly connected with a baffle plate, and the inner side of the baffle plate is fixedly connected with a tube bundle. According to the device, a sealing assembly is arranged, a threaded sleeve is rotated, a threaded column is gradually contained in the threaded sleeve, at the moment, a sliding plate slides along the inner side of a sealing shell, a limiting sleeve gets close to an inserting ring, and therefore the space where a hollow sealing ring is located is compressed, and under the joint limitation of the limiting sleeve and the inserting ring, the hollow sealing ring expands towards the inner side; therefore, the refrigerant can be prevented from leaking from the two ends of the tube bundle.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and specifically to a heat exchange device for a chiller unit. Background Technology

[0002] In modern industry and many other fields, chillers are a crucial piece of equipment, widely used in air conditioning systems, industrial cooling processes, and other scenarios. Their core function is to achieve a cooling effect through heat exchange between refrigerant and chilled water. Within a chiller, the heat exchange device plays a vital role, directly affecting the overall heat exchange efficiency and operational stability of the unit.

[0003] In existing technologies, the connection between heat exchanger tubes and tube sheets is often a weak point in heat exchangers where leaks are prone to occur. Common connection methods include expansion joints and welding. If the expansion joint process is improper, it may lead to a loose connection between the heat exchanger tubes and tube sheets; poor welding quality and welding defects can also easily cause leakage problems during operation. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is as follows: a heat exchange device for a chiller unit, comprising: a shell, an inlet pipe fixedly connected to the top of the shell, an outlet pipe fixedly connected to the bottom of the shell on the side away from the inlet pipe, a rear end cover fixedly connected to one side of the shell, a front end cover fixedly connected to the other side of the shell, a partition plate fixedly connected to the inner side of the front end cover, a baffle plate fixedly connected to the inner side of the shell, and a tube bundle fixedly connected to the inner side of the baffle plate. Refrigerant enters the interior of the front end cover from the inlet connecting pipe connected to the upper part of the front end cover and enters the tube bundle above. After completing heat exchange, the fluid returns to the front end cover through the tube bundle and gathers below the partition plate, and is finally discharged through the outlet pipe.

[0005] A sealing assembly is provided, wherein the outer side of the sealing assembly is fixedly connected to both sides of the inner wall of the housing. The sealing assembly includes a sealing shell, a sliding plate slidably connected to the inner side of the sealing shell, a threaded sleeve rotatably connected to the inner side of the sliding plate, a threaded post threadedly connected to the inner wall of the threaded sleeve, an insertion ring fixedly connected to the inner side of the sealing shell, a limit sleeve slidably connected to the outer side of the insertion ring, a hollow sealing ring being engaged with the inner side of the limit sleeve, the outer side of the sealing shell being fixedly connected to both sides of the inner wall of the housing, and the outer side of the sealing shell being fixedly connected to the outer side of the partition plate. By rotating the threaded sleeve, the threaded post gradually retracts into the threaded sleeve, at which time the sliding plate slides along the inner side of the sealing shell.

[0006] Preferably, the outer side of the threaded column is fixedly connected to the inner side of the sealing shell, the outer side of the limiting sleeve is fixedly connected to the outer side of the sliding plate, and the outer side of the hollow sealing ring is in contact with the inner side of the insertion ring. When the limiting sleeve moves closer to the insertion ring, it can compress the space where the hollow sealing ring is located. At this time, under the joint restriction of the limiting sleeve and the insertion ring, the hollow sealing ring expands inward.

[0007] Preferably, the inner wall of the sealing shell is fixedly connected to both ends of the tube bundle, the inner wall of the sliding plate is fixedly connected to the outer wall of the tube bundle, the inner side of the hollow sealing ring is in contact with the outer wall of the tube bundle, and the hollow sealing ring remains in close contact with the outer wall of the tube bundle when it expands inward.

[0008] Preferably, baffles are fixedly connected to both sides of the outer wall of the baffle, and the baffles are arranged linearly along the outer wall of the baffle. The baffles are set to further disturb the flow state of the fluid, so as to form a more complex turbulence.

[0009] Preferably, the outer wall of the tube bundle is fixedly connected with heat dissipation fins, and the heat dissipation fins are linearly arranged along the central axis of the tube bundle. By setting heat dissipation fins, the heat exchange area between the tube bundle and the fluid is further increased, so that heat can be transferred between the fluid and the tube bundle more quickly and fully.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. This invention further disrupts the fluid flow by incorporating a baffle plate, creating more complex turbulence within the casing. Additionally, heat dissipation fins further increase the heat exchange area between the tube bundle and the fluid, allowing for faster and more efficient heat transfer. The turbulent fluid flow better washes the tube bundle surface, reducing thermal resistance and further improving heat exchange efficiency.

[0012] 2. This utility model, by setting a sealing component, rotates the threaded sleeve, causing the threaded post to gradually retract into the threaded sleeve. At this time, the sliding plate slides along the inner side of the sealing shell, causing the limiting sleeve to move closer to the insertion ring, thereby compressing the space where the hollow sealing ring is located. Under the joint restriction of the limiting sleeve and the insertion ring, the hollow sealing ring expands inward, keeping it tightly attached to the outer wall of the tube bundle, thereby preventing refrigerant from leaking from both ends of the tube bundle. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the sealing assembly of this utility model;

[0016] Figure 4 This is a structural schematic diagram of part A of this utility model;

[0017] Figure 5 This is an exploded view of the sealing component of this utility model.

[0018] In the diagram: 1. Shell; 2. Inlet pipe; 3. Outlet pipe; 4. Front cover; 5. Rear cover; 6. Divider plate; 7. Baffle plate; 8. Baffle plate; 9. Tube bundle; 10. Sealing assembly; 11. Heat dissipation fins; 101. Sealing shell; 102. Sliding plate; 103. Insertion ring; 104. Limiting sleeve; 105. Hollow sealing ring; 106. Threaded post; 107. Threaded sleeve. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0020] Example: Please refer to Figure 1 - Figure 5 This utility model provides a technical solution: a heat exchange device for a chiller unit, comprising:

[0021] The housing 1 has an inlet pipe 2 fixedly connected to its top, an outlet pipe 3 fixedly connected to its bottom (the side away from the inlet pipe 2), a rear end cover 5 fixedly connected to one side, and a front end cover 4 fixedly connected to the other side. A partition plate 6 is fixedly connected to the inner side of the front end cover 4. A baffle plate 7 is fixedly connected to the inner side of the housing 1, and a tube bundle 9 is fixedly connected to the inner side of the baffle plate 7. Baffle plates 8 are fixedly connected to both sides of the outer wall of the baffle plate 7, and the baffle plates 8 are linearly arranged along the outer wall of the baffle plate 7. Heat dissipation fins 11 are fixedly connected to the outer wall of the tube bundle 9, and the heat dissipation fins 11 are linearly arranged along the central axis of the tube bundle 9. After the chiller unit starts, refrigerant flows from the front end cover 4... The inlet pipe connected at the top enters the front cover 4 and flows above the partition plate 6. The fluid entering the upper tube bundle 9 flows in the tube side of the tube bundle 9, and then the fluid reaches the rear cover 5 through the tube bundle 9. From the rear cover 5, the fluid enters the lower tube bundle 9 and flows again in the tube side of the tube bundle 9. After completing the flow in the lower tube bundle 9 and the heat exchange with the outside fluid, the fluid returns to the front cover 4 through the tube bundle 9 and gathers below the partition plate 6, and is finally discharged through the outlet pipe 3. During this process, after the heat exchange fluid inlet pipe 2 enters the shell 1, the flow path of the fluid will change under the action of the baffle plate 7, forming a zigzag flow trajectory. This zigzag flow mode allows the fluid to laterally scour the tube bundle 9 multiple times, greatly increasing the contact opportunity and contact time between the fluid and the tube bundle 9. At the same time, the baffle plate 8 is set to further disturb the flow state of the fluid, making it form a more complex turbulent flow. Heat dissipation fins 11 are added to further increase the heat exchange area between the tube bundle 9 and the fluid, allowing heat to be transferred more quickly and fully between the fluid and the tube bundle 9. The turbulent fluid can better scour the surface of the tube bundle 9, reducing thermal resistance and further improving heat exchange efficiency.

[0022] A sealing assembly 10 is fixedly connected to both sides of the inner wall of the housing 1 on its outer side. The sealing assembly 10 includes a sealing shell 101, a sliding plate 102 slidably connected to the inner side of the sealing shell 101, a threaded sleeve 107 rotatably connected to the inner side of the sliding plate 102, a threaded post 106 threadedly connected to the inner wall of the threaded sleeve 107, a plug ring 103 fixedly connected to the inner side of the sealing shell 101, a limit sleeve 104 slidably connected to the outer side of the plug ring 103, a hollow sealing ring 105 snapped into the inner side of the limit sleeve 104, the outer side of the sealing shell 101 fixedly connected to both sides of the inner wall of the housing 1, the outer side of the sealing shell 101 fixedly connected to the outer side of the partition plate 6, the outer side of the threaded post 106 fixedly connected to the inner side of the sealing shell 101, the outer side of the limit sleeve 104 fixedly connected to the outer side of the sliding plate 102, and the hollow sealing ring 105... The outer side of the sealing assembly 101 contacts the inner side of the insertion ring 103, the inner wall of the sealing shell 101 is fixedly connected to both ends of the tube bundle 9, the inner wall of the sliding plate 102 is fixedly connected to the outer wall of the tube bundle 9, and the inner side of the hollow sealing ring 105 contacts the outer wall of the tube bundle 9. By setting the sealing assembly 10, refrigerant can be prevented from leaking from both ends of the tube bundle 9. When installing the sealing assembly 10, by rotating the threaded sleeve 107, the threaded post 106 is gradually retracted into the threaded sleeve 107. At this time, the sliding plate 102 slides along the inner side of the sealing shell 101, causing the limiting sleeve 104 to move closer to the insertion ring 103, thereby compressing the space where the hollow sealing ring 105 is located. At this time, under the joint restriction of the limiting sleeve 104 and the insertion ring 103, the hollow sealing ring 105 expands inward and remains tightly attached to the outer wall of the tube bundle 9, thereby preventing refrigerant from leaking from both ends of the tube bundle 9.

[0023] Working principle:

[0024] After the chiller unit is started, the refrigerant enters the interior of the front cover 4 through the inlet connecting pipe connected to the upper part of the front cover 4 and flows above the partition plate 6. The fluid entering the upper tube bundle 9 flows in the tube side of the tube bundle 9, and then the fluid reaches the rear cover 5 through the tube bundle 9. The fluid enters the lower tube bundle 9 from the rear cover 5 and flows in the tube side of the tube bundle 9 again. After completing the flow in the lower tube bundle 9 and the heat exchange with the outside fluid, the fluid returns to the front cover 4 through the tube bundle 9 and gathers below the partition plate 6, and is finally discharged through the liquid outlet pipe 3.

[0025] During this process, after the heat exchange fluid enters the shell 1 through the inlet pipe 2, the flow path of the fluid changes under the action of the baffle 7, forming a zigzag flow trajectory. This zigzag flow pattern allows the fluid to laterally scour the tube bundle 9 multiple times, greatly increasing the contact opportunities and contact time between the fluid and the tube bundle 9. Simultaneously, the baffle 8 further disrupts the fluid flow state, creating a more complex turbulent flow. The heat dissipation fins 11 further increase the heat exchange area between the tube bundle 9 and the fluid, allowing heat to be transferred more quickly and fully between the fluid and the tube bundle 9. The turbulent fluid can better scour the surface of the tube bundle 9, reducing thermal resistance and further improving heat exchange efficiency.

[0026] By setting the sealing assembly 10, refrigerant leakage from both ends of the tube bundle 9 can be prevented. When installing the sealing assembly 10, by rotating the threaded sleeve 107, the threaded post 106 is gradually retracted into the threaded sleeve 107. At this time, the sliding plate 102 slides along the inner side of the sealing shell 101, causing the limiting sleeve 104 to move closer to the insertion ring 103, thereby compressing the space where the hollow sealing ring 105 is located. At this time, under the joint restriction of the limiting sleeve 104 and the insertion ring 103, the hollow sealing ring 105 expands inward and remains tightly attached to the outer wall of the tube bundle 9, thereby preventing refrigerant leakage from both ends of the tube bundle 9.

[0027] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A heat exchange device for a chiller unit, characterized in that, include: The shell (1) has an inlet pipe (2) fixedly connected to its top, an outlet pipe (3) fixedly connected to the bottom of the shell (1) on the side away from the inlet pipe (2), a rear end cover (5) fixedly connected to one side of the shell (1), a front end cover (4) fixedly connected to the other side of the shell (1), a partition plate (6) fixedly connected to the inside of the front end cover (4), a baffle plate (7) fixedly connected to the inside of the shell (1), and a tube bundle (9) fixedly connected to the inside of the baffle plate (7). A sealing assembly (10) is fixedly connected to both sides of the inner wall of the housing (1) on its outer side. The sealing assembly (10) includes a sealing shell (101). A sliding plate (102) is slidably connected to the inner side of the sealing shell (101). A threaded sleeve (107) is rotatably connected to the inner side of the sliding plate (102). A threaded post (106) is threadedly connected to the inner wall of the threaded sleeve (107). A plug ring (103) is fixedly connected to the inner side of the sealing shell (101). A limit sleeve (104) is slidably connected to the outer side of the plug ring (103). A hollow sealing ring (105) is snapped into the inner side of the limit sleeve (104).

2. The heat exchange device for a chiller unit according to claim 1, characterized in that: The outer side of the sealing shell (101) is fixedly connected to both sides of the inner wall of the shell (1), and the outer side of the sealing shell (101) is fixedly connected to the outer side of the partition plate (6).

3. The heat exchange device for a chiller unit according to claim 1, characterized in that: The outer side of the threaded post (106) is fixedly connected to the inner side of the sealing shell (101), the outer side of the limiting sleeve (104) is fixedly connected to the outer side of the sliding plate (102), and the outer side of the hollow sealing ring (105) is in contact with the inner side of the plug ring (103).

4. A heat exchange device for a chiller unit according to claim 1, characterized in that: The inner wall of the sealing shell (101) is fixedly connected to both ends of the tube bundle (9), the inner wall of the sliding plate (102) is fixedly connected to the outer wall of the tube bundle (9), and the inner side of the hollow sealing ring (105) is in contact with the outer wall of the tube bundle (9).

5. A heat exchange device for a chiller unit according to claim 1, characterized in that: The baffle (7) has two fixed connections to the two sides of its outer wall, and the baffle (8) is arranged linearly along the outer wall of the baffle (7).

6. A heat exchange device for a chiller unit according to claim 1, characterized in that: The outer wall of the tube bundle (9) is fixedly connected with heat dissipation fins (11), and the heat dissipation fins (11) are arranged linearly along the central axis of the tube bundle (9).

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