An air energy coil assembly

Abstract

This utility model belongs to the field of air source heat pump coil technology, specifically referring to an air source heat pump coil assembly, including a shell and a single tube. The shell has a cylindrical hollow structure, and a fixing plate is installed on the top of the shell. The fixing plate is horizontally covered on the top of the shell, and the fixing plate has through holes. Two sets of through holes are arranged symmetrically, and connecting components are installed in the corresponding through holes. The single tube passes through the connecting components and the through holes. The two sets of single tubes pass through the two connecting components and the through holes respectively. The tube segments located inside the shell are spirally wound to form a coil. The connecting components include a threaded sleeve, a nut, and a trapezoidal rubber ring. Double sealing is achieved through the cooperation of the trapezoidal rubber ring and the elastic rubber ring. The annular step of the trapezoidal rubber ring and the annular convex edge of the elastic rubber ring form an interference fit, which can actively compensate for the aging gap of the rubber ring after long-term use. At the same time, the ease of assembly is significantly improved, and the installation time is greatly shortened.

Description

Technical Field

[0001] This utility model belongs to the field of air source heat pump coil technology, specifically referring to an air source heat pump coil assembly. Background Technology

[0002] Air source heat pump coil units are core heat exchange components in air source heat pumps, air conditioners, and other equipment. Their connection stability and sealing performance directly determine the equipment's lifespan. In existing technologies, to address the problems of "over-welding, corrosion, and perforation" that easily occur with traditional welded hard connections, some solutions adopt a soft connection structure of "base, nut sleeve, and rubber ring." However, this still has shortcomings: First, the base and equipment mounting plate are mostly fixed with screws, making the installation process cumbersome; second, the rubber ring relies solely on compression for sealing, and long-term use can lead to seal failure due to aging of the contact surface; third, the coil is positioned within the casing solely by its spiral shape, and vibrations during equipment operation can easily cause the coil to shift or collide with and wear against the casing. Utility Model Content

[0003] To address the aforementioned problems of cumbersome installation of flexible connections, easy seal failure, and easy displacement of coils, this utility model provides an air source coil assembly that achieves simplified structure, reliable sealing, and convenient assembly.

[0004] To achieve the above functions, the technical solution adopted by this utility model is as follows: An air source heat pump coil assembly includes a shell and a single tube. The shell has a cylindrical hollow structure. A fixing plate is installed on the top of the shell. The fixing plate horizontally covers the top of the shell. The fixing plate has through holes. Two sets of through holes are arranged symmetrically. Connecting components are installed in the through holes. The single tube passes through the connecting components and the through holes. The two sets of single tubes pass through the two connecting components and the through holes respectively. The tube segments located inside the shell are spirally wound to form a coil. The connecting components include a threaded sleeve, a nut, and a trapezoidal rubber ring. The threaded sleeve is installed on the fixing plate. The threaded sleeve is installed at the position corresponding to the through hole. The trapezoidal rubber ring is connected to the bottom of the nut. The nut and the threaded sleeve are screwed together to fit the thread. An annular step is provided on the outer wall of the trapezoidal rubber ring.

[0005] As a preferred embodiment of this utility model, an elastic rubber ring is provided inside the through hole, and an annular protrusion is provided on the outer wall of the elastic rubber ring, and the annular protrusion is interference-fitted with the annular step.

[0006] As a preferred technical solution of this utility model, an arc-shaped positioning plate is provided inside the outer shell. Two sets of arc-shaped positioning plates are arranged opposite each other. Elastic telescopic rods are evenly connected between the arc-shaped positioning plates and the inner sidewall of the outer shell. The two sets of arc-shaped positioning plates are in contact with the outer wall of the coil to limit the radial displacement of the coil.

[0007] As a preferred technical solution of this utility model, the arc-shaped positioning plate is made of heat-resistant rubber material and has anti-slip texture to further enhance the stability of the fit with the coil.

[0008] As a preferred embodiment of this utility model, the cross-section of the trapezoidal rubber ring is an isosceles trapezoid, with the width of the upper base being greater than the width of the lower base.

[0009] Compared with the prior art, the present invention achieves the following beneficial effects by adopting the above structure: 1. Double sealing is achieved through the combination of "trapezoidal rubber ring and elastic rubber ring". The annular step of the trapezoidal rubber ring and the annular convex edge of the elastic rubber ring form an interference fit, which can actively compensate for the aging gap after long-term use of the rubber ring. In addition, the cross section of the trapezoidal rubber ring is an isosceles trapezoid. When the nut is screwed on, it will generate a dual force of radial compression and axial compaction on the rubber ring, resulting in stronger sealing surface fit and effectively avoiding the aging failure problem of "single compression seal". 2. The integrated connection assembly adopts direct assembly with threaded sleeves and screw-on nuts. Each connection assembly does not require additional drilling or screwing, which significantly improves the ease of assembly and greatly shortens the installation time. 3. Two sets of opposing arc-shaped positioning plates inside the outer casing are connected to the inner wall of the outer casing through evenly distributed elastic telescopic rods. They can adapt to the spiral shape of the coil, fit tightly against the outer wall of the coil, and limit its radial displacement. At the same time, the anti-slip texture on the surface of the arc-shaped positioning plates can further enhance the fit stability and avoid collision and wear between the coil and the outer casing during equipment operation. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of an air source heat pump coil assembly proposed in this utility model; Figure 2 This is a bottom view of the housing of an air source coil assembly proposed in this utility model; Figure 3 This is a cross-sectional view of a fixing plate for an air source coil assembly proposed in this utility model. Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0011] Among them, 1. Outer shell, 101. Arc-shaped positioning plate, 102. Elastic telescopic rod, 2. Single tube, 3. Fixing plate, 301. Through hole, 302. Elastic rubber ring, 303. Annular protrusion, 4. Connecting assembly, 401. Threaded sleeve, 402. Nut, 403. Trapezoidal rubber ring, 404. Annular step, 5. Coil. Detailed Implementation

[0012] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. 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 scope of protection of this utility model.

[0013] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0014] like Figures 1-4 As shown, the present invention provides an air source heat pump coil assembly, including a housing 1 and a single tube 2. The housing 1 has a cylindrical hollow structure. A fixing plate 3 is installed on the top of the housing 1. The fixing plate 3 is horizontally covered on the top of the housing 1. The fixing plate 3 has through holes 301. Two sets of through holes 301 are arranged symmetrically. A connecting component 4 is installed in the through hole 301. The single tube 2 passes through the connecting component 4 and the through hole 301. The two sets of single tubes 2 pass through the two connecting components 4 and the through holes 301 respectively. The tube segments located inside the housing 1 are spirally wound to form a coil 5.

[0015] The connecting component 4 includes a threaded sleeve 401, a nut 402, and a trapezoidal rubber ring 403. The threaded sleeve 401 is installed on the fixing plate 3, and the threaded sleeve 401 is installed at the position corresponding to the through hole 301. The trapezoidal rubber ring 403 is connected to the bottom of the nut 402. The cross section of the trapezoidal rubber ring 403 is an isosceles trapezoid, and the width of the upper base is greater than the width of the lower base. The nut 402 is screwed into the thread of the threaded sleeve 401. An annular step 404 is provided on the outer wall of the trapezoidal rubber ring 403. An elastic rubber ring 302 is provided in the through hole 301. An annular protrusion 303 is provided on the outer wall of the elastic rubber ring 302. The annular protrusion 303 and the annular step 404 are interference fit.

[0016] An arc-shaped positioning plate 101 is provided inside the outer casing 1. Two sets of arc-shaped positioning plates 101 are arranged opposite each other. Elastic telescopic rods 102 are evenly connected between the arc-shaped positioning plates 101 and the inner side wall of the outer casing 1. The two sets of arc-shaped positioning plates 101 are in contact with the outer wall of the coil 5 to limit the radial displacement of the coil 5. The arc-shaped positioning plates 101 are made of heat-resistant rubber material and have anti-slip texture to further enhance the stability of the contact with the coil 5.

[0017] In practical use, the fixing plate 3 is horizontally placed on top of the outer casing 1, ensuring that the mounting holes of the fixing plate 3 are aligned with the positioning holes on the top of the outer casing 1. The trapezoidal rubber ring 403 is then placed on one end of the single tube 2, and the nut 402 is screwed into the outside of the single tube 2. Subsequently, the end of the single tube 2 with the nut 402 and the trapezoidal rubber ring 403 is inserted through the threaded sleeve 401 on the upper surface of the fixing plate 3, passing through the threaded sleeve 401 and the elastic rubber ring 302 in sequence, until the lower end of the single tube 2 enters the interior of the outer casing 1. The nut 402 is rotated to engage with the threaded sleeve 401. When the nut 402 descends to the point where the annular step 404 of the trapezoidal rubber ring 403 contacts the annular protrusion 303 of the elastic rubber ring 302, it is continued to be slowly tightened until the annular step 404 and the annular protrusion 303 form an interference fit, completing the sealing assembly of the single set of connecting components 4. Repeat the above operations to complete the assembly of another set of single tube 2 connecting components 4. The two single tube 2 sections located inside the outer shell 1 are wound into a coil 5 according to the design spiral parameters. The position of the coil 5 inside the outer shell 1 is adjusted to ensure that the center of the coil 5 is coaxial with the center of the outer shell 1. The two sets of arc-shaped positioning plates 101 are placed opposite each other inside the outer shell 1 so that the inner side wall of the arc-shaped positioning plate 101 is in contact with the outer wall of the coil 5. The length of the elastic telescopic rod 102 is adjusted to ensure that the two sets of arc-shaped positioning plates 101 together restrict the radial displacement of the coil 5.

[0018] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An air source heat pump coil assembly, comprising a housing (1) and a single tube (2), wherein the housing (1) has a cylindrical hollow structure, characterized in that: A fixing plate (3) is installed on the top of the outer shell (1). The fixing plate (3) is horizontally covered on the top of the outer shell (1). The fixing plate (3) has a through hole (301). Two sets of through holes (301) are arranged symmetrically. A connecting component (4) is installed in the through hole (301). The single tube (2) passes through the connecting component (4) and the through hole (301). The two sets of single tubes (2) pass through the two connecting components (4) and the through hole (301) respectively. The tube segment located inside the outer shell (1) is spirally wound. The coil is formed (5); the connecting component (4) includes a threaded sleeve (401), a nut (402) and a trapezoidal rubber ring (403). The threaded sleeve (401) is installed on the fixing plate (3). The threaded sleeve (401) is installed at the position corresponding to the through hole (301). The trapezoidal rubber ring (403) is connected to the bottom of the nut (402). The nut (402) is screwed into the thread of the threaded sleeve (401) to be compatible. The outer wall of the trapezoidal rubber ring (403) is provided with an annular step (404).

2. An air source heat pump coil assembly according to claim 1, characterized in that: An elastic rubber ring (302) is provided inside the through hole (301), and an annular protrusion (303) is provided on the outer wall of the elastic rubber ring (302). The annular protrusion (303) is interference-fitted with the annular step (404).

3. An air source heat pump coil assembly according to claim 1, characterized in that: An arc-shaped positioning plate (101) is provided inside the outer shell (1). Two sets of arc-shaped positioning plates (101) are arranged opposite each other. An elastic telescopic rod (102) is uniformly connected between the arc-shaped positioning plate (101) and the inner side wall of the outer shell (1).

4. An air source heat pump coil assembly according to claim 3, characterized in that: The arc-shaped positioning plate (101) is made of heat-resistant rubber and has anti-slip texture.

5. An air source heat pump coil assembly according to claim 1, characterized in that: The trapezoidal rubber ring (403) has an isosceles trapezoidal cross section, with the upper base width being greater than the lower base width.

Images