Finned tube heat exchanger with grooves

Abstract

The utility model provides a finned tube heat exchanger with grooves, which comprises fins, and heat exchange tubes are arranged on the fins in a penetrating manner. Grooves are formed in the fins, electric heating pipes used for defrosting the fins are arranged in the grooves, and the outer walls of the electric heating pipes abut against the inner walls of the grooves of the fins. Each fin is provided with a windward side face located at the upper air opening, an air supply side face located at the lower air opening and a connecting side face connecting the windward side face and the air supply side face. The outer walls of the electric heating pipes abut against the inner walls of the fin grooves, so that the contact area of the electric heating pipes and the fin grooves is increased, the heat transfer efficiency is improved, and the defrosting effect is improved; the grooves extend along the curve, the contact area of the electric heating pipes and the fins can be increased, the heat transfer efficiency is improved, and the defrosting effect is improved.

Description

Technical Field

[0001] The utility model relates to a fin tube heat exchanger, in particular to a fin tube heat exchanger with grooves. Background Art

[0002] Finned tube heat exchanger (also called finned tube evaporator) is a commonly used heat exchanger currently, widely used in the refrigeration equipment industry, and can be used as an evaporator and condenser.

[0003] In the prior art, Chinese patent CN204188032U discloses a finned-tube heat exchanger comprising fins and heat exchange tubes. The fins are provided with ribs, which have heat transfer performance and can improve the heat transfer capacity of the entire heat exchanger. The fins are also provided with fin holes to enhance the heat transfer performance of the fin surface. The inner tube of the heat exchange tube is provided with a threaded structure, which can not only increase the heat transfer area, but also make the flow of the refrigerant in the tube turbulent, thereby improving the convection heat transfer coefficient in the tube. However, the excessively low evaporation temperature of the finned-tube heat exchanger easily causes the evaporator to frost quickly, thereby affecting the heat transfer performance of the evaporator.

[0004] Therefore, in the prior art, heating wires are added to fin-tube heat exchangers to prevent frost on the fins. For example, Chinese Patent CN216245775U discloses a fin-tube heat exchanger in which a heating wire is installed on the air inlet side of the refrigerant tube. This fin-tube heat exchanger can prevent frost on the fins and prevent the water generated by defrosting from freezing after flowing down. However, the heating wire is installed on the air inlet side of the refrigerant tube. The heat generated by the heating wire is transferred to the fins through thermal radiation, resulting in relatively low heat transfer efficiency, which is not conducive to energy saving and efficient defrosting.

[0005] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0006] The purpose of the utility model is to address the deficiencies of the prior art and thus provide a fin-tube heat exchanger with grooves that performs defrosting by means of efficient heat conduction.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A fin-tube heat exchanger with a groove comprises a fin, on which a heat exchange tube is passed; the fin is provided with a groove, in which an electric heating tube for defrosting the fin is arranged, and the outer wall of the electric heating tube abuts the inner wall of the fin groove; the fin has a windward side located at the upwind outlet, an air supply side located at the downwind outlet, and a connecting side connecting the windward side and the air supply side.

[0009] Preferably, the groove on the fin is located on the windward side.

[0010] Preferably, the groove on the fin is located on the air supply side.

[0011] Preferably, both the windward side surface and the air supply side surface are provided with grooves.

[0012] Preferably, the groove on the fin is located on the connecting side.

[0013] Preferably, the connecting side surface includes a vertical side surface and a bottom side surface; and the groove on the connecting side surface is provided on the vertical side surface.

[0014] Preferably, the groove on the connecting side is provided on the bottom side.

[0015] Preferably, the groove is a straight groove body or a curved groove body.

[0016] Preferably, the groove is semi-cylindrical, rectangular or T-shaped.

[0017] The present invention has substantial features and progress over the prior art. Specifically, the present invention has the following advantages:

[0018] 1. The outer wall of the electric heating tube abuts against the inner wall of the fin groove to increase the contact area between the electric heating tube and the fin groove, improve the heat transfer efficiency, and improve the defrosting effect.

[0019] 2. The groove is extended along the curve, which can increase the contact area between the electric heating tube and the fin, improve the heat transfer efficiency, and improve the defrosting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a top view of Example 2 of a fin-tube heat exchanger with grooves of the present invention.

[0021] Figure 2 It is a schematic structural diagram of Example 1 of the fin-tube heat exchanger with grooves of the present invention from a top view.

[0022] Figure 3 It is a schematic structural diagram of a cross-section of Example 4 of the fin-tube heat exchanger with grooves of the present invention.

[0023] Figure 4 It is a schematic structural diagram of a side view of Example 3 of the fin-tube heat exchanger with grooves of the present invention.

[0024] Figure 5 It is a schematic structural diagram of a side view of Example 8 of the fin-tube heat exchanger with grooves of the present invention.

[0025] Figure 6 It is a schematic structural diagram of a top view of embodiment 10 of the fin-tube heat exchanger with grooves of the present invention.

[0026] In the picture:

[0027] 11. fin; 12. heat exchange tube; 13. groove;

[0028] 21. Windward side; 22. Air supply side; 24. Vertical side. DETAILED DESCRIPTION

[0029] The following is a specific implementation method, combined with Figures 1 to 6 , the technical solution of the utility model is further described in detail.

[0030] Example 1:

[0031] A fin-tube heat exchanger with grooves comprises fins 11, and heat exchange tubes 12 are passed through the fins 11.

[0032] The fin 11 is provided with a groove 13, in which an electric heating tube for defrosting the fin 11 is arranged. The outer wall of the electric heating tube abuts against the inner wall of the groove 13 on the fin 11 to increase the contact area between the electric heating tube and the groove 13 on the fin 11 and improve the heat transfer efficiency.

[0033] The fin 11 has a windward side surface 21 located at the upwind port, an air supply side surface 22 located at the downwind port, and a connecting side surface connecting the windward side surface 21 and the air supply side surface 22. Specifically, the connecting side surface includes a vertical standing side surface 24 and a horizontal bottom side surface located at the bottom surface of the fin 11.

[0034] Furthermore, the groove 13 on the fin 11 is located on the windward side 21 .

[0035] Furthermore, the groove 13 is a groove body extending along a straight line.

[0036] Furthermore, the cross-sectional profile of the groove 13 is semicircular.

[0037] Example 2:

[0038] The difference between this embodiment and embodiment 1 is that, in this embodiment, the groove 13 on the fin 11 is located on the air supply side surface 22 .

[0039] Example 3:

[0040] The difference between this embodiment and embodiment 1 is that, in this embodiment, the groove 13 is provided on the vertical side surface 24 .

[0041] Example 4:

[0042] The difference between this embodiment and embodiment 1 is that, in this embodiment, the groove 13 is provided on the bottom side.

[0043] It is understandable that Examples 1 to 4 can be combined arbitrarily. For example, Example 1 and Example 3 can be combined to obtain Example 5.

[0044] Example 5:

[0045] The difference between this embodiment and embodiment 1 is that, in this embodiment, the grooves on the fins are provided on the windward side and the vertical side.

[0046] It is understandable that Examples 1 to 4 can be combined arbitrarily. For example, Example 1 and Example 4 can be combined to obtain Example 6.

[0047] Example 6:

[0048] The difference between this embodiment and embodiment 1 is that, in this embodiment, the grooves on the fin are provided on the windward side and the bottom side.

[0049] It is understandable that Examples 1 to 4 can be combined arbitrarily, for example, Example 2 and Example 3 can be combined to obtain Example 7.

[0050] Example 7:

[0051] The difference between this embodiment and embodiment 1 is that, in this embodiment, the grooves on the fins are provided on the air supply side surface and the vertical side surface.

[0052] Example 8:

[0053] The difference between this embodiment and any of the above embodiments is that, in this embodiment, the groove 13 is a groove body extending along a curve.

[0054] Example 9:

[0055] The difference between this embodiment and any of the above embodiments is that, in this embodiment, the cross-sectional profile of the groove is rectangular.

[0056] Example 10:

[0057] The difference between this embodiment and any one of the above embodiments 1 to 8 is that, in this embodiment, the cross-sectional profile of the groove 13 is T-shaped.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A fin tube heat exchanger with grooves, characterized in that: It includes fins, and heat exchange tubes are passed through the fins; The fin is provided with a groove, and an electric heating tube for defrosting the fin is provided in the groove, and the outer wall of the electric heating tube abuts against the inner wall of the fin groove; The fin has a windward side surface located at an upwind port, an air supply side surface located at a downwind port, and a connecting side surface connecting the windward side surface and the air supply side surface.

2. The fin-tube heat exchanger with grooves according to claim 1, characterized in that: The groove on the fin is located on the windward side.

3. The fin-tube heat exchanger with grooves according to claim 1, characterized in that: The groove on the fin is located on the air supply side.

4. The fin-tube heat exchanger with grooves according to claim 1, characterized in that: The windward side surface and the air supply side surface are both provided with grooves.

5. The fin-tube heat exchanger with grooves according to any one of claims 1 to 4, characterized in that: The groove on the fin is located on the connecting side.

6. The fin-tube heat exchanger with grooves according to claim 5, characterized in that: The connecting side includes a vertical side and a bottom side; The groove on the connecting side surface is arranged on the standing side surface.

7. The fin-tube heat exchanger with grooves according to claim 6, characterized in that: The groove on the connecting side is provided on the bottom side.

8. The fin-tube heat exchanger with grooves according to claim 7, characterized in that: The groove is a straight groove body or a curved groove body.

9. The fin-tube heat exchanger with grooves according to claim 8, characterized in that: The groove is semi-cylindrical, rectangular or T-shaped.

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