Integral aluminum finned tube evaporator for double-compressor refrigerator

Abstract

The utility model discloses an integral aluminum finned tube evaporator for a double-compressor refrigerator, which comprises two support plates arranged in parallel, and is characterized in that two independent evaporators are arranged between the two support plates and comprise a plurality of finned tubes positioned between the two support plates; finned tubes of the two independent evaporators are respectively connected by respective independent pipeline systems; the finned tube is composed of an evaporation tube and heat dissipation fins, and the evaporation tube and the heat dissipation fins are of an integrated structure formed by integrally rolling an aluminum tube. The evaporating pipes and the radiating fins are of an integrated structure formed at a time, heat resistance does not exist between pipe fins, and the overall heat exchange efficiency of the evaporator is high. The hydrophilic functional coating effectively reduces the attachment of condensate water, reduces the frosting amount, shortens the defrosting time and reduces the energy consumption; material consumption is reduced, and comprehensive cost is low; the product is small in structure and space-saving, and the effective volume of refrigeration equipment is relatively increased.

Description

Technical Field

[0001] This utility model relates to refrigeration evaporator technology, and in particular to an integrated aluminum finned tube evaporator for a dual-compressor freezer. Background Technology

[0002] The evaporator is a crucial component of a refrigerator's refrigeration system. It utilizes the fact that liquid, low-temperature refrigerant easily evaporates under low pressure, turning into vapor and absorbing heat from the medium being cooled, thus achieving the purpose of refrigeration and freezing. Its materials and structure determine the evaporator's heat exchange efficiency, directly affecting the energy efficiency rating of the refrigeration equipment.

[0003] Commercial freezers, due to their large capacity and the wide variation in the amount of food they can hold, often employ dual-compressor technology. Compared to traditional single-compressor technology, dual-compressor technology can operate under different cooling loads, achieving high efficiency and energy savings. Under low load conditions, only one compressor operates, reducing energy consumption and operating costs; under high load conditions, both compressors operate simultaneously, thereby improving cooling efficiency.

[0004] In existing technologies, commonly used evaporator types mainly include copper tube or aluminum tube finned evaporators and coaxial finned tube evaporators. For example, patent publication number CN201281500Y describes an aluminum tube finned evaporator where the straight sections at both ends of the evaporator tube are circular, and several parallel fins have insertion holes at both ends. The evaporator tube is bent in a "U" shape, with the straight sections on both sides of the bend inserted into the insertion holes on both sides of the fins. Another example is a push-in finned evaporator with patent publication number CN204987571U, where the aluminum coil is integrally formed, and the fins are manufactured by a single stamping process. The stamped fins are inserted into the aluminum coil and subjected to interference fit to form an integral expanded tube.

[0005] These publicly disclosed finned evaporators all use fins formed by punching holes, then the evaporator tubes pass through the holes and are tightened through an internal expansion process. Others use rolled finned tubes, with the evaporator tubes inserted before rolling and the finned tubes pressed onto the surface of the evaporator tubes by rolling force. Because the fin holes and evaporator tubes are mechanically expanded or rolled, gaps are unavoidable. These gaps are also prone to loosening under external force, and debris such as aluminum shavings may be squeezed into them, leading to thermal resistance between the tube and fins and reducing heat transfer efficiency. Summary of the Invention

[0006] The purpose of this utility model is to solve the above problems and provide an integral aluminum finned tube evaporator for dual-compressor freezers. Its evaporator tube and heat dissipation fins are integrally rolled from aluminum tubes. There is no thermal resistance between the tube and the fins. It has the characteristics of good heat transfer efficiency, low overall cost, convenient installation, reduced space occupied by components, and increased effective volume of the freezer.

[0007] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: an integral aluminum finned tube evaporator for a dual-compressor freezer, comprising two parallel support plates, characterized in that two independent evaporators are provided between the two support plates, the evaporator comprising a plurality of finned tubes located between the two support plates, and the finned tubes of the two independent evaporators are connected by their respective independent piping systems.

[0008] The finned tube consists of an evaporator tube and heat dissipation fins, which are integral structures rolled from aluminum tubes.

[0009] In the aforementioned integrated aluminum finned tube evaporator for a dual-compressor freezer, preferably, the independent piping system of the two independent evaporators includes a small U-tube located outside the two support plates, and an outlet end and an inlet end located at the same end of the evaporator.

[0010] In the aforementioned integrated aluminum finned tube evaporator for a dual-compressor refrigerator, preferably, the integrated heat dissipation fins and evaporation tubes, which are integrally rolled from aluminum tubes, have a continuous spiral structure.

[0011] In the aforementioned integrated aluminum finned tube evaporator for a dual-compressor freezer, preferably, the thickness of the heat dissipation fins is 0.2–0.3 mm, the spacing between the heat dissipation fins is 3–5 mm, and the height of the heat dissipation fins is 5–10 mm.

[0012] In the aforementioned integrated aluminum finned tube evaporator for a dual-compressor freezer, preferably, the two independent evaporators are arranged in a straight or oblique configuration.

[0013] In the aforementioned integrated aluminum finned tube evaporator for a dual-compressor freezer, preferably, the support plate is provided with holes that mate with the evaporator tubes.

[0014] In the aforementioned integrated aluminum finned tube evaporator for a dual-compressor freezer, preferably, the support plate is provided with heater mounting slots.

[0015] In the aforementioned integrated aluminum finned tube evaporator for a dual-compressor freezer, preferably, the evaporator tube and heat dissipation fins are provided with a hydrophilic anti-corrosion coating.

[0016] This technical solution focuses on the design and application of a dual-evaporator assembly in a large-capacity dual-system commercial freezer. It utilizes two independent refrigeration systems—dual compressors, dual condensers, and dual evaporators—to accommodate varying amounts of food. When the food volume is small (low load), only one refrigeration system operates, reducing energy consumption and operating costs. Conversely, when the food volume is large (high load), both refrigeration systems operate simultaneously to maximize refrigeration efficiency. The device organically combines the two evaporators with a support plate, significantly reducing space requirements, simplifying the assembly process, minimizing component space occupation, and increasing the effective volume of the freezer.

[0017] This device utilizes the ductility and easy rolling characteristics of aluminum to roll the evaporator tube and heat dissipation fins into a single integrated structure through a single aluminum tube, resulting in a product with no thermal resistance between the tube and fins. Compared with existing products, this significantly improves heat transfer efficiency, and since it is made of a single all-aluminum material, the overall cost is low.

[0018] This solution involves coating the entire evaporator surface with a hydrophilic anti-corrosion coating, which not only improves the corrosion resistance of the device but also reduces the surface tension of the fins, effectively reducing the adhesion of condensate and the amount of frost.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the evaporator tube and heat dissipation fins are integrally formed in one piece, there is no thermal resistance between the tube and the fins, and the overall heat exchange efficiency of the evaporator is high; the hydrophilic functional coating effectively reduces condensate adhesion, reduces the amount of frost, shortens the defrosting time, and reduces energy consumption; the amount of materials used is reduced, and the overall cost is low; the product structure is compact, saves space, and relatively increases the effective volume of the refrigeration equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of a finned tube structure according to this utility model.

[0022] Figure 3 This is a schematic cross-sectional view of the finned tube structure of this utility model.

[0023] Figure 4 yes Figure 3 A magnified schematic diagram of the structure at point M in the middle.

[0024] In the diagram: 1-finned tube, 101-evaporator tube, 102-heat dissipation fin, 2-small U-tube, 3-support plate, 4-outlet end, 5-inlet end. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0026] This embodiment describes an integrated aluminum finned tube evaporator for a dual-compressor refrigerator. (See also...) Figure 1 Two parallel support plates 3 are provided. The support plates 3 are L-shaped in general. The support plates 3 are provided with heater mounting slots and holes that cooperate with the evaporator tube 101.

[0027] Two independent evaporators are installed between two support plates 3. Each evaporator includes two finned tubes 1 located between the two support plates 3. The finned tubes 1 of the two independent evaporators are connected by their respective independent piping systems. The independent piping systems of the two independent evaporators include small U-tubes 2 located outside the two support plates 3, and an outlet end 4 and an inlet end 5 located at the same end of the evaporator. The finned tubes 1, small U-tubes 2, outlet end 4, and inlet end 5 are all connected by welding.

[0028] Finned tube 1 consists of evaporator tube 101 and heat dissipation fins 102, such as Figures 2 to 4 The evaporator tube 101 and the heat dissipation fins 102 are integral structures formed by rolling the same aluminum tube as a whole. The evaporator tube 101 is a round tube, and the heat dissipation fins 102 have a continuous spiral structure.

[0029] The thickness of the heat dissipation fins 102 is 0.2-0.3 mm, the spacing between adjacent fins is 3-5 mm, and the fin height is 5-10 mm. The internal diameter of the aluminum tubes is φ6-φ10 mm, and the number is determined by the structural dimensions of the evaporator. The two independent evaporators form a straight or oblique S-shaped structure.

[0030] The surfaces of the evaporator tube 101 and the heat dissipation fins 102 are provided with a hydrophilic anti-corrosion coating, which not only improves the corrosion resistance of the device, but also reduces the surface tension of the fins due to the hydrophilicity of the coating, effectively reducing the adhesion of condensate and reducing the amount of frost.

[0031] The above embodiments are illustrative of the present invention and not intended to limit it. Although the present invention has been described in conjunction with preferred embodiments, it should be understood that the present invention is not limited to the preferred embodiments. Those skilled in the art can make various equivalent modifications and substitutions to the technical solutions of the present invention based on its teachings. Therefore, the scope of the present invention should be defined by the claims, and all such equivalent modifications and substitutions fall within the protection scope of the present invention.

Claims

1. A unitary aluminium finned tube evaporator for dual compressor refrigerator comprising two parallelly arranged support plates (3) characterised in that Two independent evaporators are arranged between the two support plates, and the evaporators comprise a plurality of finned tubes (1) arranged between the two support plates, and the finned tubes of the two independent evaporators are connected by independent pipeline systems respectively; The finned tube is composed of an evaporation tube (101) and a heat dissipation fin (102), and the evaporation tube and the heat dissipation fin are an integrated structure formed by integral rolling of an aluminum tube.

2. The integral aluminum finned tube evaporator for dual compressor refrigerator according to claim 1, wherein The independent pipeline systems of the two independent evaporators comprise small U-shaped tubes (2) arranged outside the two support plates (3), and an outlet end (4) and an inlet end (5) arranged at the same end of the evaporator.

3. The integral aluminum finned tube evaporator for dual compressor refrigerator according to claim 1, wherein In the integrated heat dissipation fin (102) and the evaporation tube (101) formed by integral rolling of an aluminum tube, the heat dissipation fin is a continuous spiral structure.

4. The integral aluminum finned tube evaporator for a dual-compressor refrigerator according to claim 1 or 3, wherein The thickness of the heat dissipation fin (102) is 0.2-0.3 mm, the spacing between the heat dissipation fins is 3-5 mm, and the height of the heat dissipation fin is 5-10 mm.

5. The integral aluminum finned tube evaporator for dual compressor refrigerator according to claim 2, wherein The two independent evaporators are integrally formed into a straight or inclined arrangement structure.

6. A whole type aluminum finned tube evaporator for a dual compressor refrigerator according to claim 1 or 2 or 3, wherein The support plate (3) is provided with a hole position matched with the evaporation tube (101).

7. A one-piece aluminium finned tube evaporator for a dual-compressor refrigerator according to claim 1 or 2 or 3, characterised in that, The support plate (3) is provided with a heater mounting hole slot.

8. The integral aluminum finned tube evaporator of claim 1 wherein, The evaporation tube (101) and the heat dissipation fin (102) are provided with a hydrophilic anticorrosive coating on the surface.

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