Compound coil structure for air-cooled water-source heat pump unit

Abstract

The utility model discloses a kind of composite coil structure for air-cooled cold source type air-water cooling unit, it is related to air-cooled cold source type air-water cooling unit, including multiple circumferential array distribution fin plate and respectively first coil and second coil on the fin plate, wherein: the second coil is located in the first coil inner distribution, and interlayer cavity is formed between the two;The first coil is barrel type;The second coil is divided into frustum and cylinder type according to structure.The utility model greatly increases the effective heat exchange area in limited space, so that refrigerant and air flowing through the outside of coil can be more fully heat exchanged, so as to significantly improve the overall refrigeration capacity and heat exchange efficiency of the entire coil group.

Description

Technical Field

[0001] This utility model relates to an air-cooled cold source air-water chiller unit, specifically a composite coil structure for an air-cooled cold source air-water chiller unit. Background Technology

[0002] Air-cooled chillers use air as the cooling source (through forced heat exchange via a fan), and the entire unit is installed outdoors. Their advantages include a simple system, no need for a water system or cooling tower, and easy installation. Disadvantages include a significant decrease in cooling efficiency (COP) during hot seasons, high energy consumption, and relatively loud noise from the condenser fan.

[0003] Referring to a Chinese patent publication, publication number CN101089518A, publication date 2007-12-19, a wind-cooled and water-cooled dual evaporator hot water unit is disclosed.

[0004] In the prior art, including the aforementioned patents, the structure of the composite coil plays a crucial role in the cooling effect. However, limited by advancements in materials science, existing technologies primarily improve the composite coil by modifying its structure to enhance cooling performance. Utility Model Content

[0005] The purpose of this invention is to provide a composite coil structure for air-cooled cold source type air-water chiller units to solve the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a composite coil structure for an air-cooled, water-cooled chiller unit, comprising multiple finned plates arranged in a circumferential array and a first coil and a second coil respectively disposed on the finned plates, wherein:

[0007] The second coil is located inside the first coil, and a cavity is formed between the two;

[0008] The first coil is barrel-shaped;

[0009] The second coil is divided into frustum type and cylindrical type according to its structure.

[0010] Preferably, the circumferential radius of the second coil section is larger than the circumferential radius of the first coil section.

[0011] Preferably, the first coil and the second coil have the same axial length.

[0012] Preferably, the pitch of the first coil is one-third of the pitch of the second coil, and the pitch of the second coil is greater than 1 cm.

[0013] Preferably, the outer surface of the finned plate is consistent with the outer contour of the second coil.

[0014] Preferably, the finned plate is divided into a finned part and an arc-shaped horizontal plate disposed at the end of the finned part and distributed inside the first coil.

[0015] Furthermore, the side spacing between the arc-shaped transverse plates of the multiple finned plates does not exceed 1.5cm.

[0016] Preferably, the arc-shaped horizontal plate is distributed adjacent to the sidewall of the first coil.

[0017] Preferably, the fin portion has rectangular grooves that are equidistantly distributed along the axial length direction and located between the first coil and the second coil;

[0018] The inner walls of the opposite sides of the rectangular groove are respectively provided with extensions that protrude outwards and are distributed in a horizontal manner.

[0019] Preferably, the two extensions on one of the rectangular grooves are distributed along the axial length direction and are distributed relative to each other.

[0020] Preferably, a mounting bracket is also included, which is welded to the plurality of said fin plates.

[0021] In the above technical solution, the composite coil structure for an air-cooled, cold-source air-water chiller provided by this utility model has the following beneficial effects: the first coil and the second coil together form a dense and efficient three-dimensional heat exchange matrix. By greatly increasing the effective heat exchange area within a limited space, the refrigerant and the air flowing outside the coil can exchange heat more fully, thereby significantly improving the overall cooling capacity and heat exchange efficiency of the entire coil assembly.

[0022] Secondly, the second coil is innovatively designed with a frustum-shaped lower section and a cylindrical upper section. The frustum-shaped structure forms a flow channel that matches the bottom contour of the cylindrical first coil, gradually narrowing from top to bottom. This flow channel generates a Venturi effect on the incoming cooling air, accelerating the air velocity in the key heat transfer area at the bottom, effectively disrupting the air boundary layer, enhancing turbulence, and thus significantly increasing the local heat transfer coefficient at this point. The entire coil structure forms different heat transfer zones at the top, middle, and bottom. As air flows through, it comes into contact with coils of different shapes, achieving efficient gradient heat transfer and avoiding the heat transfer dead zones present in traditional single-structure designs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the structure of the first coil and the second coil provided in the embodiments of this utility model;

[0026] Figure 3 Provided for the embodiments of this utility model Figure 1 A schematic diagram of the exploded structure;

[0027] Figure 4 This is a schematic diagram of the structure of the finned plate provided in an embodiment of the present utility model;

[0028] Figure 5 Provided for the embodiments of this utility model Figure 4 A side view structural diagram.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Fin plate; 11. Fin section; 12. Arc-shaped horizontal plate; 13. Rectangular groove; 14. Extension section; 2. First coil; 3. Second coil; 31. Frustum type; 32. Cylindrical type; 4. Mounting bracket. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0032] Please see Figure 1-5 This utility model provides a technical solution: a composite coil structure for an air-cooled, cold-source type air-water chiller unit, including the following embodiments:

[0033] The composite coil structure includes a mounting frame 4, multiple finned plates 1, a first coil 2, and a second coil 3. The multiple finned plates 1 are arranged in a circumferential array and are fixedly connected to the mounting frame 4 by welding or other methods to form a stable skeleton structure.

[0034] The first coil 2 is barrel-shaped (i.e., cylindrical spiral coil) and is inserted through all the finned plates 1. The second coil 3 is also inserted through all the finned plates 1 and is located within the internal space of the first coil 2. The second coil 3 is structurally divided into upper and lower parts: the lower part is frustum-shaped 31 (i.e., conical spiral coil), and the upper part is cylindrical 32 (i.e., cylindrical spiral coil). The first coil 2 and the second coil 3 are not in direct contact, forming a continuous sandwich cavity 100.

[0035] In this embodiment, the circumferential radius of the second coil 3 is larger than that of the first coil 2. This design allows the second coil 3 to be spatially closer to the inner fin plate 1, while the first coil 2 is closer to the outer side, thus rationally allocating space.

[0036] The first coil 2 and the second coil 3 have the same axial length, which ensures the regularity of the entire composite coil structure in the length direction and the integrity of the heat exchange area.

[0037] The pitch of the first coil 2 is designed to be one-third of the pitch of the second coil 3, and the pitch of the second coil 3 is greater than 1 cm. This design allows the outer first coil 2 to be wound more tightly to maximize the heat exchange area in a limited space; while the inner second coil 3 is wound relatively loosely, which helps to reduce airflow resistance and complements the dense structure of the first coil 2, optimizing the overall heat exchange and flow field.

[0038] During operation, cooling air, driven by a fan, flows axially through a channel formed by a circumferential array of finned plates 1. The air first exchanges heat with the external first coil 2, and then some air enters the interlayer cavity 100 for secondary heat exchange with the internal second coil 3. The frustoconical second coil 31 guides and accelerates the airflow, enhancing heat exchange. This structure, through the coordinated operation of the inner and outer coils, significantly increases the effective heat exchange area and improves heat exchange efficiency.

[0039] Example 2

[0040] Please see Figure 4 Based on Embodiment 1, this embodiment further optimizes the structure of the finned plate 1.

[0041] The finned plate 1 is structurally divided into a finned portion 11 and an arc-shaped horizontal plate 12. The finned portion 11 constitutes the main body of the plate. The arc-shaped horizontal plates 12 are disposed at the ends of the finned portion 11 and are distributed inside the first coil 2. The arc-shaped horizontal plates 12 of multiple finned plates 1 together form an approximately closed cylindrical inner wall.

[0042] The side spacing between the arc-shaped transverse plates 12 of two adjacent fin plates 1 does not exceed 1.5 cm. This narrow gap ensures structural strength while allowing some airflow to pass through, forming a specific internal flow channel.

[0043] Furthermore, the arc-shaped horizontal plate 12 is distributed adjacent to the sidewall of the first coil 2, meaning that the outer surface of the arc-shaped horizontal plate 12 is very close to the inner wall of the first coil 2. This allows the arc-shaped horizontal plate 12 to effectively transfer heat from the first coil 2 to the interior and guides the airflow to flow more closely against the inner wall of the first coil 2, enhancing the heat exchange effect inside the first coil 2 and making the internal flow field more orderly.

[0044] Example 3

[0045] Please see Figure 5 Based on Embodiment 2, this embodiment features a more refined design for the fin section 11 to further enhance airflow disturbance and heat exchange performance.

[0046] On the fin portion 11, rectangular grooves 13 are equidistantly distributed along the axial length direction. These rectangular grooves 13 are located within the interlayer cavity 100 region between the first coil 2 and the second coil 3.

[0047] On the inner walls of opposite sides of each rectangular groove 13, there are extensions 14 protruding outwards. These extensions 14 are distributed horizontally.

[0048] Specifically, the two extensions 14 on a rectangular groove 13 are distributed along the axial length direction and are opposite to each other. This design makes the extensions 14 act like a series of tiny guide vanes or baffles, extending into the airflow passing through the interlayer cavity 100.

[0049] When air flows through the interlayer cavity 100, these horizontally distributed extensions 14 can effectively cut and disturb the airflow that might otherwise be smooth, generating a large number of controllable micro-vortices. These vortices can significantly disrupt the thermal boundary layer of the air, making the heat exchange between the core airflow and the coil wall and fin surface more intense, thereby greatly enhancing the turbulent heat transfer effect.

[0050] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A composite coil structure for an air-cooled, water-cooled chiller unit, characterized in that, It includes multiple finned plates (1) arranged in a circumferential array and a first coil (2) and a second coil (3) respectively threaded onto the finned plates (1), wherein: The second coil (3) is located inside the first coil (2), and a sandwich cavity (100) is formed between the two. The first coil (2) is barrel-shaped; The second coil (3) is divided into frustum type (31) and cylindrical type (32) according to its structure.

2. The composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 1, characterized in that, The circumferential radius of the second coil (3) is greater than the circumferential radius of the first coil (2).

3. The composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 1, characterized in that, The first coil (2) and the second coil (3) have the same axial length.

4. The composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 1, characterized in that, The pitch of the first coil (2) is one-third of the pitch of the second coil (3), and the pitch of the second coil (3) is greater than 1cm.

5. The composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 1, characterized in that, The outer surface of the finned plate (1) is consistent with the outer contour of the second coil (3).

6. The composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 1, characterized in that, The finned plate (1) is divided into a finned part (11) and an arc-shaped horizontal plate (12) disposed at the end of the finned part (11) and located inside the first coil (2). Furthermore, the side spacing of the arc-shaped horizontal plates (12) of the multiple finned plates (1) does not exceed 1.5cm.

7. The composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 6, characterized in that, The arc-shaped horizontal plate (12) is distributed adjacent to the side wall of the first coil (2).

8. The composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 6, characterized in that, The fin portion (11) has rectangular grooves (13) that are equidistantly distributed along the axial length direction and located between the first coil (2) and the second coil (3). The inner walls of the opposite sides of the rectangular groove (13) are respectively provided with extensions (14) that protrude outward and are distributed in a horizontal state.

9. A composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 8, characterized in that, Two extensions (14) on one of the rectangular grooves (13) are distributed along the axial length direction and are distributed relative to each other.

10. The composite coil structure for an air-cooled, cold-source type air-water chiller unit according to claim 1, characterized in that, It also includes a mounting bracket (4), which is welded to multiple of the finned plates (1).

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