A small-bore evaporator

Abstract

The utility model discloses a small pipe diameter evaporator, including multiple heat exchange fins and heat exchange tube coil subassembly, the transverse pipe portion of heat exchange tube coil subassembly is clamped in the corresponding through -hole of all heat exchange fins, heat exchange tube coil subassembly includes at least two groups of heat exchange coil, heat exchange coil is composed of multiple transverse pipe portions and multiple U-shaped elbow pipe portions, the length of every heat exchange coil is consistent, the import end of all heat exchange coils is at the same side, and the export end of all heat exchange coils is at the same side of another side. Its heat exchange tube coil subassembly is composed of multiple heat exchange coils, all heat exchange coils are equipped with an import and an export, thereby making its refrigerant flow be big, guaranteeing heat exchange efficiency, and, the pipe diameter of the heat exchange coil that it adopts is small, makes its improved heat exchange coefficient, and its volume reduces, weight reduces, cost reduces.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchanger processing equipment, and more specifically to a small-diameter evaporator. Background Technology

[0002] The tube-fin evaporator has a compact structure and excellent heat exchange performance. It is not only suitable for single-phase fluid flow, but also of great value for phase change heat transfer.

[0003] Currently, tube-fin evaporators have gradually achieved a reduction in diameter from 9.52mm to 7mm to 5mm. By reducing the diameter of the copper tubes in the tube-fin evaporator, the consumption of copper and aluminum materials and the amount of refrigerant charged can be significantly reduced, thereby meeting the cost reduction needs of enterprises.

[0004] The outer diameter of heat exchange tubes in existing evaporators is generally 5mm or more, resulting in a large amount of copper usage. Furthermore, in terms of heat exchange performance, thinner tubes have a higher heat transfer coefficient than thicker tubes. Therefore, using thinner tubes to manufacture heat exchange tubes can significantly reduce costs while maintaining heat exchange efficiency and requiring less copper. However, such a structure is currently unavailable. Additionally, existing evaporators typically have only one inlet and one outlet, with the internal heat exchange tubes arranged in an S-shaped coil. This limited refrigerant flow leads to excessive refrigerant pressure drop, resulting in a lower average temperature difference and consequently reduced heat exchange capacity. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a small-diameter evaporator. Its heat exchange coil assembly consists of multiple heat exchange coils, each with an inlet and an outlet, which results in a large refrigerant flow rate and ensures heat exchange efficiency. Furthermore, the small diameter of the heat exchange coils improves the heat transfer coefficient, and the evaporator is also smaller in size, lighter, and cheaper.

[0006] The solution of this utility model to the aforementioned technical problem is: A small-diameter evaporator includes multiple heat exchange fins and heat exchange tube coil assemblies. The transverse tube portion of the heat exchange tube coil assembly is inserted into the corresponding through holes of all the heat exchange fins. The heat exchange tube coil assembly includes at least two sets of heat exchange coils. The heat exchange coil consists of multiple horizontal tube sections and multiple U-shaped bends; Each heat exchange coil has the same length; The inlet ends of all heat exchange coils are on the same side, and the outlet ends of all heat exchange coils are on the same side of the other side.

[0007] The heat exchanger coil assembly includes four sets of heat exchanger coils; All heat exchange coils extend laterally in an S-shape, and the four sets of heat exchange coils are evenly distributed on all heat exchange fins from top to bottom.

[0008] Each heat exchange coil consists of ten horizontal tube sections and nine U-shaped bends connected to form an S-shaped horizontally coiled tube body.

[0009] The outstanding effect of this utility model is: Compared with existing technologies, its heat exchanger coil assembly consists of multiple heat exchanger coils, each with an inlet and an outlet, resulting in a large refrigerant flow rate, reduced refrigerant pressure drop, and guaranteed heat exchange efficiency. Furthermore, the transverse tube section and U-shaped bend section of the heat exchanger coil are made with tubes with a diameter of 4mm to 4.9mm. The small tube diameter improves the heat transfer coefficient, and the volume, weight, and cost are reduced. Attached Figure Description

[0010] Figure 1 This is a partial structural schematic diagram of the present invention; Figure 2 This is a partial top view of the present invention; Figure 3 This is a partial structural diagram of the present invention with the front fixing plate removed; Figure 4 This is a partial structural schematic diagram of the heat exchanger coil assembly of this utility model; Figure 5 This is a schematic diagram of the refrigerant flow of this utility model. Detailed Implementation

[0011] For example, see below. Figures 1 to 5 As shown, a small-diameter evaporator includes multiple heat exchange fins 10 and a heat exchange tube coil assembly 20. The transverse tube portion of the heat exchange tube coil assembly 20 is inserted into the corresponding through holes of all the heat exchange fins 10. The heat exchange tube coil assembly 20 includes at least two sets of heat exchange coils 21. The heat exchange coil 21 consists of multiple horizontal tube sections and multiple U-shaped bends; Each heat exchange coil 21 has the same length; The inlet ends of all heat exchange coils 21 are on the same side, and the outlet ends of all heat exchange coils 21 are on the same side of the other side.

[0012] Furthermore, the heat exchanger coil assembly 20 includes four sets of heat exchanger coils 21; All heat exchange coils 21 extend laterally in an S-shape, and the four sets of heat exchange coils 21 are evenly distributed from top to bottom on all heat exchange fins 10.

[0013] Furthermore, each heat exchange coil 21 is composed of ten transverse tubes and nine U-shaped bends connected to form an S-shaped horizontal coiled tube body. The ends of two adjacent transverse tubes on the same side are welded and fixedly connected through the corresponding U-shaped bends. Then, the other end of one transverse tube is welded and fixedly connected to the end of the adjacent transverse tube on the same side through the corresponding U-shaped bends. All transverse tubes and U-shaped bends are connected in this way to form an S-shaped horizontal coil.

[0014] Meanwhile, the front end of the leftmost horizontal tube of all heat exchange coils 21 extends out of the front wall of the left side of the frontmost heat exchange fin 10 and is connected to the same outlet connection pipe 30, and the central axis of the front end of the leftmost horizontal tube of all heat exchange coils 21 is on the same vertical line.

[0015] A main outlet connector 31 is connected to one side wall of the outlet connection pipe 30.

[0016] The outlet connecting pipe 30 has multiple side connectors 32 connected to its side plate. The front end of the leftmost transverse pipe of all heat exchange coils 20 is connected to the corresponding side connector 32. All side connectors 32 have the same length, so the flow length of all heat exchange coils 21 is the same. This design ensures that the refrigerant flow in all heat exchange coils 21 is consistent, guaranteeing the uniformity of refrigerant flow and heat exchange.

[0017] Furthermore, the transverse tube section and U-shaped bend section of the heat exchange coil 21 are made of tubes with a diameter of 4mm to 4.9mm. In this embodiment, the transverse tube section and U-shaped bend section of the heat exchange coil 21 use tubes with a diameter of 4mm, which reduces the amount of copper used in the same length compared to existing heat exchange coils with diameters (all greater than 5mm), thus reducing manufacturing costs. Moreover, the use of 4mm copper tubes to make the heat exchange coil 21 increases the heat transfer coefficient and improves the heat exchange effect. In addition, the small size of the heat exchange coil 21 with a diameter of 4mm allows for the installation of four heat exchange coils 21 in this embodiment, thereby increasing the total refrigerant flow rate per unit time and improving the heat exchange effect.

[0018] Furthermore, the heat exchange coil 21 is a copper tube, and the heat exchange fins 10 are aluminum fins.

[0019] Furthermore, the upper left and lower left portions of all heat exchange fins 10 are formed with mounting through holes for the transverse tube portions of which the heat exchange coil 20 is not installed.

[0020] The mounting holes for the horizontal tubes without heat exchange coils 20 are located at the upper and lower parts of the heat exchange fins 10. Since the middle part of the tube-fin evaporator has the largest heat exchange capacity, placing the mounting holes for the horizontal tubes without heat exchange coils 20 at the upper and lower parts of the heat exchange fins 10 will not affect the heat exchange effect in the middle part. At the same time, since there are no horizontal pipes installed at the mounting holes for the horizontal tubes without heat exchange coils 20 at the upper and lower parts of the heat exchange fins 10, the airflow at the corresponding positions is smoother, ensuring the air velocity.

[0021] Furthermore, the front end of the rightmost horizontal tube section of all heat exchange coils 21 is the inlet end, which extends out of the front wall of the right side of the frontmost heat exchange fin 10, and the central axis of the front end of all the rightmost horizontal tube sections is on the same vertical line.

[0022] In this embodiment, during installation, the front end of the transverse tube section of the heat exchanger coil assembly 20 is fixed to the same front fixing plate, and the rear end of the transverse tube section of the heat exchanger coil assembly 20 is fixed to the same rear fixing plate.

[0023] Meanwhile, in this embodiment, the left side of the lowest heat exchange coil 21 has two horizontal tubes aligned vertically, while the left side of the highest heat exchange coil 21 has only one horizontal tube. This increases the airflow heat exchange area of ​​the lower heat exchange coil 21. Since the condensate produced by the evaporator flows downward, it reduces the airflow velocity at the bottom of the evaporator, and the condensate film increases the thermal resistance, affecting the heat exchange effect below. Increasing the airflow heat exchange area of ​​the lower heat exchange coil 21 can improve the heat exchange effect below, thus ensuring the heat exchange effect of the lower heat exchange coil 21.

[0024] Finally, the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model, and the patent protection scope of the present utility model should be defined by the claims.

Claims

1. A small-diameter evaporator, comprising a plurality of heat exchange fins (10) and a heat exchange tube coil assembly (20), wherein the transverse tube portion of the heat exchange tube coil assembly (20) is engaged in the corresponding through holes of all the heat exchange fins (10), characterized in that: The heat exchanger coil assembly (20) includes at least two sets of heat exchanger coils (21). Each heat exchange coil (21) has the same length.

2. The small-diameter evaporator according to claim 1, characterized in that: The heat exchanger coil assembly (20) includes four sets of heat exchanger coils (21). All heat exchange coils (21) extend laterally in an S-shape and are evenly distributed from top to bottom on all heat exchange fins (10).

3. The small-diameter evaporator according to claim 1, characterized in that: Each heat exchange coil (21) consists of multiple transverse tube sections and multiple U-shaped bends; the inlet ends of all heat exchange coils (21) are on the same side, and the outlet ends of all heat exchange coils (21) are on the same side of the other side.

4. A small-diameter evaporator according to claim 3, characterized in that: Each heat exchange coil (21) consists of an S-shaped horizontal coiled tube body formed by ten horizontal tube sections and nine U-shaped bends.

5. A small-diameter evaporator according to claim 1, characterized in that: The front end of the leftmost horizontal tube of all heat exchange coils (21) extends out of the front wall of the left side of the frontmost heat exchange fin (10) and is connected to the same outlet connection pipe (30). The main outlet connector (31) is connected to one side wall of the outlet connection pipe (30).

6. A small-diameter evaporator according to claim 5, characterized in that: The outlet connecting pipe (30) has multiple side connectors (32) connected to its side plate, and the front end of the leftmost horizontal pipe of all heat exchange coils (20) is connected to the corresponding side connector (32).

7. A small-diameter evaporator according to claim 1, characterized in that: The transverse tube section and U-shaped bend section of the heat exchange coil (21) are made of tubes with a diameter of 4 mm to 4.9 mm.

8. A small-diameter evaporator according to claim 1, characterized in that: The heat exchange coil (21) is a copper tube, and the heat exchange fins (10) are aluminum fins.

9. A small-diameter evaporator according to claim 1, characterized in that: The upper left and lower left portions of all heat exchange fins (10) are formed with mounting through holes for the transverse tube portion of the heat exchange coil (21) that is not installed.

10. A small-diameter evaporator according to claim 1, characterized in that: The front end of the rightmost horizontal tube section of all heat exchange coils (21) is the inlet end, which extends out of the front wall of the right side of the frontmost heat exchange fin (10).

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