Energy-saving finned evaporator

Abstract

The utility model belongs to the technical field of finned evaporators, and particularly relates to an energy-saving finned evaporator which comprises an evaporator body and fins, and the evaporator body comprises evaporating pipes, a first inlet and a first outlet which are parallel to one another; a bent pipe is arranged between the mutually parallel evaporation pipes; the fins comprise a plurality of large fins and small fin groups; protruding parts for increasing the flowing area of refrigerant fluid are arranged on the portions, between the adjacent large fins, of the evaporation pipe. According to the energy-saving finned evaporator, the evaporator body and the fins are mainly improved, and the protruding parts including the upper protruding parts and the lower protruding parts are arranged on the evaporating pipes of the evaporator body, so that the heat exchange area is increased; according to the large fins, traditional straight fins are improved to be in a corrugated shape, and the small fin sets are arranged between the adjacent large fins, so that the contact area between air and the fins can be increased; the first small fins and the second small fins are in a corrugated shape so as to reduce the air flowing resistance and increase the contact area.

Description

Technical Field

[0001] This utility model relates to the field of finned evaporator technology, specifically an energy-saving finned evaporator. Background Technology

[0002] Finned evaporators are key components widely used in heat exchange systems for refrigeration and heating. They mainly consist of two parts: evaporator tubes and fins. Their working principle is based on the heat exchange process. The refrigerant flows inside the evaporator tubes, absorbing a large amount of heat through evaporation, thus lowering the temperature of the evaporator tubes. The fins are tightly arranged on the outer wall of the evaporator tubes. There are various types of finned evaporators, with the tube-fin type being the most common. It consists of a series of tubes and fins fitted onto the tubes. Currently, the evaporator tubes in this type are straight tubes, and the fins are straight plates, resulting in generally low heat exchange efficiency, which needs improvement.

[0003] Therefore, we propose an energy-saving finned evaporator to solve the above problems. Utility Model Content

[0004] In view of the problems existing in the above and / or existing energy-saving finned evaporators, this utility model is proposed, which can solve the problems mentioned above.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0006] An energy-saving finned evaporator includes an evaporator body and fins. The evaporator body includes parallel evaporation tubes for refrigerant to flow through, a first inlet, and a first outlet communicating with the first inlet. Bends are provided between the parallel evaporation tubes.

[0007] The fins include a number of large fins arranged in parallel between the mutually parallel evaporator tubes, and a number of small fin groups that increase the heat exchange area are arranged between adjacent large fins.

[0008] The evaporator tubes between adjacent large fins are provided with protrusions to increase the flow area of ​​the refrigerant.

[0009] The evaporator tube is arranged horizontally, and the large fins are arranged vertically. The large fins are provided with insertion holes, and the evaporator tube is inserted into the large fins through the insertion holes.

[0010] The bend includes a first bend near the first inlet and a second bend away from the first inlet, and the evaporator body forms a continuous reversing structure through the first bend, the second bend and the evaporator tube.

[0011] At least one heat exchange chamber is formed between adjacent evaporator tubes and adjacent large fins, and the heat exchange chamber is provided with a group of small fins.

[0012] The small fin group has at least one first small fin and one second small fin, one end of the first small fin is perpendicularly connected to a large fin, and one end of the second small fin is perpendicularly connected to the opposite large fin.

[0013] The first and second small fins are arranged alternately.

[0014] Two adjacent small fin groups in the horizontal direction are symmetrically arranged with the large fin between the two adjacent small fin groups as the axis of symmetry.

[0015] The protrusion includes an upper protrusion and a lower protrusion symmetrically arranged with the evaporator tube as the axis of symmetry, and both the upper and lower protrusions protrude outward in an arc shape.

[0016] The first and second bends are U-shaped tubes, and the evaporator tube is a straight tube.

[0017] The large fin is a corrugated fin that reduces airflow resistance.

[0018] Compared with existing technologies:

[0019] This utility model mainly improves the evaporator body and fins through an energy-saving finned evaporator. The evaporator body is provided with protrusions on the evaporation tube, including upper protrusions and lower protrusions, so as to increase the heat exchange area.

[0020] The large fins improve the traditional straight fins into a corrugated shape, and small fin groups are set between adjacent large fins, which can increase the contact area between air and fins.

[0021] The first and second small fins are corrugated to reduce airflow resistance and increase contact area. Attached Figure Description

[0022] Figure 1 A perspective view of the protrusion provided on the evaporator tube in this utility model;

[0023] Figure 2 This is a front view of the evaporator tube with a protrusion in this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the evaporator tube in this utility model, which has a protrusion and large and small fins.

[0025] Figure 4 for Figure 3 A schematic diagram of the structure of A in the middle;

[0026] Figure 5 This is a schematic diagram of the structure of the large fins in this utility model, which are corrugated in shape. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description will be provided in conjunction with the appendix. Figures 1-5 The embodiments of this utility model will be described in further detail.

[0028] This utility model provides an energy-saving finned evaporator, which mainly improves the evaporator body 1 and the fins 2. The evaporator body is provided with a protrusion 111 on the evaporation tube 11 to increase the flow area of ​​the refrigerant; the fins are improved from traditional straight fins to corrugated shape, which can increase the contact area between air and fins by 10%-30%.

[0029] Some specific implementation examples are as follows:

[0030] The evaporator body 1 includes parallel evaporator tubes 11 through which refrigerant flows, a first inlet 12, and a first outlet 13 communicating with the first inlet 12. The parallel evaporator tubes 11 are connected by bends 14. The bends 14 include a first bend 141 near the first inlet 12 and a second bend 142 away from the first inlet 12. The evaporator body 1 forms a continuous reversing structure through the first bend 141, the second bend 142, and the evaporator tubes 11. The first bend 141 and the second bend 142 are U-shaped tubes, and the evaporator tubes 11 are straight tubes.

[0031] Then, a protrusion 111 is provided on the evaporator tube 11 to increase the flow area of ​​the refrigerant. The protrusion 111 includes an upper protrusion 1111 and a lower protrusion 1112 symmetrically arranged with the evaporator tube 11 as the axis of symmetry. Both the upper protrusion 1111 and the lower protrusion 1112 protrude outward in an arc shape to increase the heat exchange area.

[0032] Furthermore, in conjunction with fins, some specific embodiments are as follows:

[0033] The fins 2 include a plurality of large fins 21 arranged in parallel between the mutually parallel evaporator tubes 11, and a plurality of small fin groups 22 for increasing the heat exchange area are provided on adjacent large fins 21; the evaporator tubes 11 between adjacent large fins 21 are provided with protrusions 111 for increasing the flow area of ​​the refrigerant.

[0034] The evaporator tube 11 is arranged horizontally, and the large fin 21 is arranged vertically. The large fin 21 is provided with a plug hole 211, and the evaporator tube 11 is plugged into the large fin 21 through the plug hole 211.

[0035] In some application scenarios, such as cool storage, cold storage corridors, fresh food storage, and controlled atmosphere storage, the spacing between adjacent large fins 21 varies. Typically, a 4mm-5mm spacing air cooler is selected. This is because in relatively high-temperature environments, the air moisture content is relatively high. A smaller fin spacing can ensure the heat exchange area while efficiently utilizing the heat and moisture exchange process between the air and the fins, thereby improving the overall heat exchange efficiency. Therefore, the design of the upper protrusion 1111 and the lower protrusion 1112 changes accordingly. Typically, the horizontal width of the upper protrusion 1111 and the lower protrusion 1112 is 4mm-5mm, and the vertical height is 1mm-2mm. The upper protrusion 1111 and the lower protrusion 1112 adopt an outwardly protruding arc-shaped structure, distributed in a periodic arrangement with the large fins 21. Through a combination of experimental and numerical simulation methods, the optimal arrangement density of the protrusions is determined, which can effectively disrupt the air boundary layer, enhance air lateral disturbance, and increase the surface heat transfer coefficient by 20%-30%.

[0036] The upper protrusion 1111 and the lower protrusion 1112 can be manufactured integrally with the evaporator tube 11 or in other ways, such as by welding. The material is copper tube, which has excellent thermal conductivity (thermal conductivity coefficient of 398W / (m·K)) and good processing performance, and can meet the requirements of refrigerant flow and heat exchange in the tube.

[0037] Of course, the above-described protrusion embodiment is not a limitation. The upper protrusion 1111 and the lower protrusion 1112 can be other shapes or structures, such as trapezoids, waves, etc.

[0038] In some further embodiments, the large fin 21 is a corrugated fin to reduce airflow resistance. In fluid mechanics research, the corrugated shape can reduce airflow resistance and increase the contact area. In this embodiment, a corrugated fin with a height of 5-10 mm and a spacing of 4-5 mm is used. Compared with traditional straight fins, it is expected to increase the contact area between air and fins by 30%-40%.

[0039] In a further embodiment, at least one heat exchange chamber 3 is formed between adjacent evaporator tubes 11 and adjacent large fins 21. The heat exchange chamber 3 is provided with a small fin group 22, which can increase the contact area between air and fins. The small fin group 22 has at least one first small fin 221 and one second small fin 222.

[0040] In this embodiment, one end of the first small fin 221 is perpendicularly connected to the large fin 21, and one end of the second small fin 222 is perpendicularly connected to the opposite large fin 21. Of course, this embodiment is not a limitation of the invention. One end of the first small fin 221 and the large fin 21 can be connected at a certain angle, and one end of the second small fin 222 and the opposite large fin 21 can be connected at a certain angle.

[0041] In a further embodiment, the first small fin 221 and the second small fin 222 are arranged alternately with at least one small fin.

[0042] In a further embodiment, two adjacent small fin groups 22 in the horizontal direction are symmetrically arranged with the large fin 21 between the two adjacent small fin groups 22 as the axis of symmetry.

[0043] In a further embodiment, the first small fin 221 and the second small fin 222 may be corrugated to reduce airflow resistance and increase contact area.

[0044] The fins mentioned above are made of aluminum alloy materials with good thermal conductivity and corrosion resistance, such as 6063 aluminum alloy, which has a thermal conductivity of up to 201 W / (m·K), effectively transferring heat and having good corrosion resistance, which can extend the service life of the evaporator.

[0045] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy efficient finned evaporator characterized by: The evaporator comprises an evaporator body and fins, the evaporator body comprises evaporating pipes parallel to each other and used for circulating refrigerant liquid, a first inlet and a first outlet connected with the first inlet; and the evaporating pipes are connected by elbow pipes; The fins comprise a plurality of large fins arranged parallel to each other between the evaporating pipes, and a plurality of small fin groups are arranged between adjacent large fins; The evaporating pipes between adjacent large fins are provided with protrusions for increasing the flow area of the refrigerant liquid.

2. An energy saving finned evaporator as claimed in claim 1 wherein: The evaporating pipes are arranged transversely, the large fins are arranged longitudinally, the large fins are provided with insertion holes, and the evaporating pipes are inserted into the large fins through the insertion holes.

3. An energy saving finned evaporator as claimed in claim 1 or 2, wherein: The elbow pipes comprise a first elbow pipe close to the first inlet and a second elbow pipe away from the first inlet, and the evaporator body comprises a continuous reversing structure formed by the first elbow pipe, the second elbow pipe and the evaporating pipes.

4. An energy saving finned evaporator as claimed in claim 3 wherein: At least one heat exchange cavity is formed between adjacent evaporating pipes and adjacent large fins, and the heat exchange cavity is provided with a small fin group.

5. An energy saving finned evaporator as claimed in claim 3 wherein: The small fin group comprises at least a first small fin and a second small fin, one end of the first small fin is connected perpendicularly to one large fin, and one end of the second small fin is connected perpendicularly to the opposite large fin.

6. An energy saving finned evaporator as claimed in claim 5 wherein: The first small fin and the second small fin are arranged alternately.

7. An energy saving finned evaporator as claimed in claim 5 wherein: Two adjacent small fin groups in the horizontal direction are arranged symmetrically with the large fins between the two small fin groups as the symmetry axis.

8. An energy saving finned evaporator as claimed in claim 1 wherein: The protrusions comprise upper protrusions and lower protrusions arranged symmetrically with the evaporating pipes as the symmetry axis, and the upper protrusions and the lower protrusions are outwardly arc-shaped protrusions.

9. An energy saving finned evaporator as claimed in claim 3 wherein: The first elbow pipe and the second elbow pipe are U-shaped pipes, and the evaporating pipes are straight pipes.

10. An energy saving finned evaporator as claimed in claim 3 wherein: The large fins are corrugated fins.

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