Air source heat pump hot and cold water unit

Abstract

The utility model discloses an air source heat pump cold and hot water unit, including heat pump machine case, heat exchanger group and axial flow fan. Heat exchanger group fixed mounting in the heat pump machine case inside and combination form cavity structure, the top surface of heat pump machine case is equipped with top cover, axial flow fan is fixed in the top cover inside, is used for guiding the airflow inside cavity to export upwards. Heat exchanger group includes several fin plates and fixed at its surface's refrigerant fin pipe, fin board one end is equipped with warping, bottom surface is equipped with wing convex part, forms the narrow pipe effect channel between adjacent warping, to optimize airflow guide and promote heat exchange efficiency. The structure can prolong the contact time with fin board before the airflow enters, and realizes the acceleration disturbance in the narrow pipe area, combines the oblique arrangement of fin board, reasonable air gap and rectangular surrounding structure, realizes the air source heat pump cold and hot water unit of high heat exchange efficiency, stable operation, low noise.

Description

Technical Field

[0001] This utility model relates to the field of heat pump technology, specifically to an air source heat pump chiller / hot water unit. Background Technology

[0002] Air source heat pump chillers, as devices that utilize low-grade heat energy from the air to achieve cooling or heating, are widely used in residential, commercial, and industrial fields due to their advantages such as energy saving, environmental protection, and wide applicability. Existing air source heat pump units typically employ a finned heat exchanger structure, which involves installing several metal fins around the refrigerant pipes to increase the contact area between the air and the heat exchange surface, thereby improving heat exchange efficiency. In this type of structure, the conventional fins are mostly arranged in a straight line, and the refrigerant pipes are often mechanically expanded or partially welded to the fins for fixation, with airflow following a straight path between the fins.

[0003] However, existing technologies still have the following shortcomings: First, the ability of flatly arranged fins to guide airflow is limited. The contact time between external air entering the heat exchanger assembly and the fin surface is short, and the airflow turbulence near the heat exchange surface is insufficient, resulting in limited heat exchange efficiency. Second, the fin ends lack optimized structural design for airflow velocity and pressure, easily leading to airflow separation, eddies, and increased flow resistance, further affecting heat exchange performance. Third, if the connection between the refrigerant pipes and fins relies solely on partial welding or simple mechanical fixing, poor contact or loosening can easily occur during long-term operation and thermal cycling, leading to decreased heat transfer performance and increased energy consumption. Furthermore, some heat exchanger assemblies are structurally concentrated only on one side of the equipment or in a localized area, failing to fully utilize the airflow path and resulting in insufficient external airflow contact area, which also affects the overall heat exchange capacity.

[0004] Therefore, existing air source heat pump chiller units still have considerable room for improvement in terms of airflow guidance, heat exchange efficiency, refrigerant pipe fixing stability, and overall structural layout. There is an urgent need for a new technical solution that improves the fin end structure, airflow channel design, and heat exchanger arrangement to enhance the unit's heat exchange efficiency, operational stability, and reduce energy consumption. Utility Model Content

[0005] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by this utility model is as follows: an air source heat pump chiller unit, including a heat pump casing, a heat exchanger assembly, and an axial fan. The heat exchanger assembly is fixedly installed inside the heat pump casing and forms a surrounding cavity structure for heat exchange with external air; the top surface of the heat pump casing is provided with a top cover, which is located above the internal cavity of the heat exchanger assembly; the axial fan is fixedly installed inside the top cover and is used to guide the airflow inside the cavity upward. The heat exchanger assembly includes several fins and refrigerant fin tubes fixed to the surface of the fins. The refrigerant fin tubes are fixedly connected to the fins and communicate with the compressor unit inside the heat pump casing to realize the circulation of refrigerant liquid. One end of the fin has a warped portion, and the bottom surface of the warped portion has a wing protrusion. An air gap is formed between adjacent fins, and a narrow tube effect channel is formed between adjacent warped portions through the wing protrusion and the surface of the warped portion, thereby achieving optimized airflow guidance and heat exchange effect.

[0007] In a preferred example, the connection between the warped portion and the fin is an arc-shaped structure. This structure can guide the airflow to flow smoothly along the surface of the fin and the warped portion, reduce airflow separation and vortex generation, reduce flow resistance, ensure airflow stability, and thus improve the uniformity and efficiency of the heat exchange process.

[0008] In a preferred example, the cross-section of the wing protrusion is a streamlined structure, with its front end smoothly transitioning to the bottom surface of the warped portion. This helps to reduce the resistance of the airflow when entering the narrow tube region, while enhancing the acceleration effect at the channel contraction position. This causes the airflow to create disturbances when passing through the refrigerant fin tube and fin surface, further improving the heat exchange efficiency.

[0009] In a preferred embodiment, the refrigerant finned tubes and fins are fixedly connected by full-circumference welding or mechanical expansion, which can ensure the sealing and heat transfer stability of the refrigerant finned tubes during long-term operation, prevent refrigerant leakage, extend the service life of the heat exchanger unit, and ensure the stable operation of the unit under hot and cold cycles.

[0010] In a preferred embodiment, the fins are arranged at an angle along the height of the heat exchanger assembly, with an angle ranging from 5° to 15°. This allows the external airflow to enter the heat exchanger assembly at an angle, increasing the contact area between the airflow and the fin surface, reducing flow losses caused by direct airflow, and improving heat exchange efficiency.

[0011] In a preferred example, the air gap width between adjacent fins is 3mm to 5mm, which achieves an optimal balance between the narrow tube effect and the heat exchange area. This ensures both the acceleration effect of the airflow in the channel and sufficient heat exchange contact area, thereby achieving stable and efficient heat exchange.

[0012] In a preferred example, the heat exchanger assembly is arranged in a rectangular ring around the perimeter of the heat pump casing, allowing external air to enter simultaneously from multiple directions, effectively expanding the airflow contact area and improving the overall heat exchange performance.

[0013] In a preferred embodiment, the axial fan is connected to the top cover via a vibration isolation bracket, which can effectively absorb and isolate the vibration generated during fan operation, reduce the transmission of vibration to the top cover and other structures of the heat pump casing, reduce operating noise, and improve the comfort and durability of the unit.

[0014] Specifically, through the optimized design of the above structure, this utility model can reduce the speed and extend the contact time of air before it enters the heat exchanger group, and accelerate and turbulent the airflow in the narrow tube area, thereby improving heat exchange efficiency, reducing energy loss and improving the stability of unit operation, and is suitable for high-efficiency cooling and heating applications under various environmental conditions.

[0015] The beneficial effects achieved by this utility model are as follows:

[0016] 1. In this utility model, by providing a warped portion at one end of the fin and a wing protrusion on the bottom surface of the warped portion, and forming a narrow tube effect channel between adjacent warped portions, the incoming airflow speed is reduced in front of the channel and fully contacts the fin surface, thereby improving the heat exchange contact efficiency; the airflow is accelerated due to the cross-sectional contraction when passing through the narrow tube channel, and rapidly expands at the outlet to reduce pressure, effectively preventing heat from accumulating inside, thereby significantly improving the overall heat exchange performance of the heat exchanger group.

[0017] 2. In this utility model, the warped part and the fin plate adopt an arc-shaped transition, and the fin protrusion is designed as a streamlined structure, so that the airflow flows smoothly along the surface of the fin plate and the warped part, reducing airflow separation and vortex formation, and reducing flow resistance; at the same time, the refrigerant fin tube and the fin plate are fixed by full-circumferential welding or mechanical expansion to ensure the heat transfer stability and sealing of the refrigerant. Combined with the inclined fin plate, reasonable air gap width and rectangular surrounding arrangement structure, the contact area of ​​the external airflow is maximized, further improving the heat exchange efficiency and operational stability of the air source heat pump chiller unit, and reducing operating noise. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0019] Figure 2 This is a top view schematic diagram of an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the heat exchanger assembly and fin structure according to an embodiment of the present invention;

[0021] Figure 4This is a partial cross-sectional schematic diagram of a heat exchanger assembly according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the finned plate and the finned tube according to an embodiment of the present invention.

[0023] Figure label:

[0024] 100. Heat pump casing; 110. Top cover;

[0025] 200. Heat exchanger assembly; 210. Fin plate; 220. Refrigerant finned tube; 211. Warped section; 212. Blade protrusion; 300. Axial fan. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0027] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0028] The following describes, with reference to the accompanying drawings, some embodiments of an air-source heat pump chiller / hot water unit provided by this utility model.

[0029] Combination Figures 1-5 As shown, this utility model provides an air source heat pump chiller / hot water unit, including a heat pump housing 100, a heat exchanger assembly 200, and an axial fan 300. The heat exchanger assembly 200 is fixedly installed inside the heat pump housing 100, and the heat exchanger assemblies 200 are combined to form a surrounding cavity structure for heat exchange with external air. A top cover 110 is provided on the top surface of the heat pump housing 100, located above the internal cavity of the heat exchanger assembly 200, for covering and protecting the upper structure of the heat exchanger assembly 200. The axial fan 300 is fixedly installed inside the top cover 110, and generates a suction effect during operation, guiding the airflow inside the heat exchanger assembly 200 upwards, thereby forming a stable air circulation path.

[0030] The heat exchanger assembly 200 includes several fins 210 and refrigerant finned tubes 220 fixed to the surface of the fins 210. The refrigerant finned tubes 220 are fixedly arranged on the surface of the fins 210 by welding and are connected to the compressor unit inside the heat pump housing 100 so that the refrigerant liquid can circulate in the refrigerant finned tubes 220, thereby completing the heat transfer between the refrigerant and the air.

[0031] like Figure 4 and Figure 5As shown, one end of the fin 210 is provided with a warped portion 211, and the bottom surface of the warped portion 211 is further provided with a wing protrusion 212. An air gap is formed between adjacent fins 210 to allow external air to enter the heat exchanger assembly 200. The adjacent warped portions 211 form a narrow channel through the upper wing protrusion 212 and the lower warped portion 211 surface, which reduces the velocity of the incoming airflow before flowing into the narrow channel, thereby increasing the contact time between the airflow and the surface of the fin 210 and improving the heat exchange effect.

[0032] In this embodiment, the connection between the warped portion 211 and the fin 210 is an arc-shaped structure. This structure helps to guide the airflow to flow smoothly along the surface of the fin 210 and the warped portion 211, avoiding airflow separation or vortex formation at corners, thereby reducing flow resistance and maintaining airflow stability.

[0033] In this embodiment, the cross-section of the wing protrusion 212 adopts a streamlined structure, and its front end is smoothly connected to the bottom surface of the warped portion 211, thereby reducing airflow resistance and enhancing the acceleration effect when the airflow enters the narrow tube area, so that the airflow forms a stronger disturbance when passing through the surface of the refrigerant fin tube 220 and the fin plate 210, thereby improving the heat exchange efficiency.

[0034] In this embodiment, the refrigerant finned tube 220 and the finned plate 210 are preferably fixedly connected by full-circumferential welding or mechanical expansion. This connection method can ensure the sealing and heat transfer stability of the refrigerant finned tube 220 during long-term operation, prevent refrigerant leakage, and extend the service life of the heat exchanger assembly 200.

[0035] In this embodiment, the fins 210 are arranged at an angle along the height of the heat exchanger assembly 200, with an angle ranging from 5° to 15°. This inclined arrangement helps guide the external airflow into the heat exchanger assembly 200 at an angle, thereby increasing the contact area between the airflow and the surface of the fins 210 and reducing flow losses caused by direct airflow.

[0036] In this embodiment, the air gap width between adjacent fins 210 is set to 3mm to 5mm. This air gap size achieves a balance between the narrow tube effect and the heat exchange area, ensuring both the acceleration effect of the airflow in the channel and sufficient heat exchange contact area.

[0037] In this embodiment, the heat exchanger group 200 is arranged in a rectangular ring, that is, the heat exchanger group 200 is continuously arranged around the inner cavity of the heat pump casing 100, so that external air can enter from four directions of the unit at the same time, which significantly increases the heat exchange area and heat exchange efficiency.

[0038] The axial fan 300 is connected to the top cover 110 by a vibration isolation bracket. When the axial fan 300 is running, the vibration isolation bracket can effectively absorb and isolate vibration, preventing vibration from being transmitted to the top cover 110 and other structures of the heat pump casing 100, thereby reducing operating noise and extending the service life of the fan and the unit.

[0039] During use, the compressor unit and axial fan 300 inside the heat pump housing 100 are started. External air enters the heat exchanger assembly 200 through the air gap between the fins 210 under the suction of the fan, and flows along the narrow tube channel formed by the fins 210, the warped part 211 and the wing protrusion 212. It exchanges heat with the surface of the fins 210 on which the refrigerant fin tubes 220 are arranged, realizing the energy transfer between the air and the refrigerant, and completing the cooling or heating process.

[0040] Working principle and usage process of this utility model:

[0041] In use, this invention utilizes an axial fan 300 mounted on the top surface of the heat pump housing 100 to draw external air horizontally into the outer surface of the heat exchanger assembly 200. During the inflow, the air first enters the internal cavity of the heat exchanger assembly 200 through the air gap between adjacent fins 210. Because one end of the fin 210 has a warped portion 211, and the bottom surface of the warped portion 211 has a wing protrusion 212, a narrow channel is formed between adjacent warped portions 211 through the wing protrusion 212 and the surface of the warped portion 211. This slows the airflow before it enters the channel, enhancing the heat exchange effect between the airflow and the surface of the fin 210.

[0042] When airflow passes through the narrow tube channel, the contraction of the channel shape causes a rapid increase in airflow velocity and pressure, resulting in efficient turbulence on the surfaces of the refrigerant finned tube 220 and finned plate 210, thus improving heat exchange efficiency. After passing through the narrow tube channel, the airflow rapidly expands at the outlet, reducing pressure and temperature, preventing heat accumulation inside and further enhancing the heat exchange effect. The refrigerant finned tube 220 contains circulating refrigerant liquid connected to the compressor unit. During the heat exchange process between the airflow and the finned plate 210, the refrigerant liquid completes the corresponding heat absorption or release processes, realizing the energy conversion between air and refrigerant.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air-source heat pump chiller / hot water unit, characterized in that, include: The heat pump housing (100), heat exchanger assembly (200), and axial fan (300) are provided. The heat exchanger assembly (200) is fixed inside the heat pump housing (100) and the inner sides are combined to form a cavity structure. The top surface of the heat pump housing (100) is provided with a top cover (110) located on the top surface of the cavity inside the heat exchanger assembly (200). The axial fan (300) is fixed inside the top cover (110) and is used to guide the airflow inside the cavity to be output upward. The heat exchanger assembly (200) includes several fins (210) and refrigerant fin tubes (220) fixed to the surface of the fins (210). The refrigerant fin tubes (220) are welded to the surface of the fins (210) and connected to the compressor unit inside the heat pump housing (100) for refrigerant liquid circulation. One end of the fin (210) is provided with a warped portion (211), and the bottom surface of the warped portion (211) is provided with a wing protrusion (212). An air gap for airflow entry is provided between adjacent fins (210). A narrow tube effect is formed between adjacent warped portions (211) through the upper wing protrusion (212) and the lower warped portion (211) surface.

2. The air source heat pump chiller / hot water unit according to claim 1, characterized in that, The connection between the warped portion (211) and the fin (210) is an arc-shaped structure, which is used to guide the airflow to flow smoothly along the surface of the fin (210) and the warped portion (211), reducing airflow separation and vortex generation.

3. The air source heat pump chiller / hot water unit according to claim 1, characterized in that, The wing protrusion (212) has a streamlined cross-section, and its front end smoothly transitions to the bottom surface of the warped part (211) to reduce airflow resistance and enhance the acceleration effect of airflow in the narrow tube area.

4. The air source heat pump chiller / hot water unit according to claim 1, characterized in that, The refrigerant finned tube (220) and the finned plate (210) are connected by full-circumference welding or mechanical expansion to ensure the stability of refrigerant heat transfer and improve heat exchange efficiency.

5. The air source heat pump chiller / hot water unit according to claim 1, characterized in that, The fins (210) are arranged at an inclination of 5° to 15° along the height of the heat exchanger assembly (200) to guide the external airflow to form an oblique flow path into the heat exchanger assembly (200).

6. The air source heat pump chiller / hot water unit according to claim 1, characterized in that, The air gap width between adjacent fins (210) is 3mm to 5mm to achieve an optimal balance between the narrow tube effect and the heat exchange area.

7. The air source heat pump chiller / hot water unit according to claim 1, characterized in that, The heat exchanger assembly (200) is arranged in a rectangular ring around the inner cavity of the heat pump casing (100) to increase the contact area with external airflow.

8. The air source heat pump chiller / hot water unit according to claim 1, characterized in that, The axial fan (300) and the top cover (110) are connected by a vibration isolation bracket to reduce vibration transmission during fan operation and reduce operating noise.

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