Refrigerator evaporator with remarkable defrosting effect and using method

Abstract

The refrigerator evaporator comprises a fixing frame, a plurality of cooling fins and a plurality of straight pipes are connected into the fixing frame, the straight pipes penetrate through the cooling fins, a bent pipe is connected between the upper straight pipe and the lower straight pipe, a plurality of PTC heating cores are connected into the fixing frame, and the PTC heating cores are connected into the fixing frame. The PTC heating core is fixedly connected with the radiating fin, the PTC heating core is obliquely arranged, the radiating fin is provided with two connecting grooves, the connecting grooves are connected with a mounting plate, the mounting plate is internally provided with a second mounting hole and a mounting groove, the second mounting hole is matched with the straight pipe, the mounting groove is connected with the PTC heating core, and the end part of the mounting plate is connected with a flange. The heat generated by the PTC heating core can quickly perform defrosting operation, so that the defrosting time is shortened, the efficiency is high, peripheral parts are effectively prevented from being burnt by high temperature, the electrical safety and reliability of the whole machine are ensured, meanwhile, the temperature of a storage chamber of the refrigerator is prevented from rising too quickly, and the deterioration phenomenon of food is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of evaporators, and in particular to a refrigerator evaporator with significant defrosting effect and a use method thereof. Background Art

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature. It is also a civilian product that keeps food or other foods at a constant low temperature. It can be seen everywhere in life, production and scientific research.

[0003] The evaporator is one of the important components of the refrigerator. Its main function is to convert the low-temperature and low-pressure liquid refrigerant into gas by absorbing heat, thereby reducing the temperature of the surrounding air or food to achieve the effect of refrigeration and preservation. During the refrigeration process of the refrigerator, the water vapor in the air in the box condenses into frost or ice on the surface of the evaporator. As the frost layer increases, if it is not defrosted, the frost layer will become thicker and thicker, the thermal resistance of the evaporator will increase, and the heat exchange efficiency will decrease. The thicker the frost layer, the more it will cause the air duct to be blocked, and the refrigerator's refrigeration capacity will gradually deteriorate, or even fail to refrigerate.

[0004] When defrosting, the existing evaporator is usually equipped with electric heating at the bottom for defrosting. The defrosting temperature is unevenly distributed, which is not conducive to energy saving and has low defrosting efficiency. At the same time, it will cause the local temperature of the refrigerator to be high and the temperature around the food to fluctuate greatly, affecting the quality of the food. Summary of the invention

[0005] The purpose of the present invention is to provide a refrigerator evaporator with significant defrosting effect, which has the advantages of being able to quickly perform defrosting operations, shortening defrosting time, being highly efficient, and effectively avoiding food spoilage, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a refrigerator evaporator with significant defrosting effect, comprising a fixed frame, wherein a plurality of heat dissipation fins and a plurality of straight tubes are connected inside the fixed frame, wherein the straight tubes penetrate the heat dissipation fins, and a bent tube is connected between the upper and lower straight tubes, and a plurality of PTC heating cores are connected inside the fixed frame, wherein the PTC heating cores are fixedly connected to the heat dissipation fins, and the PTC heating cores are arranged at an angle.

[0007] Preferably, the heat dissipation fin is provided with two connecting grooves, the connecting groove is connected to a mounting plate, a second mounting hole and a mounting groove are provided in the mounting plate, the second mounting hole matches the straight tube, and the mounting groove is connected to a PTC heating core.

[0008] Preferably, the end of the mounting plate is connected with a flange.

[0009] Preferably, the connecting groove is connected with a second folded edge, and the second folded edge is welded to the mounting plate.

[0010] Preferably, the heat dissipating fin is provided with a mounting hole 1, the mounting hole 1 matches the straight tube, and the mounting hole 1 is connected with a folded edge 1, and the folded edge 1 is welded to the straight tube.

[0011] Preferably, a bottom plate is detachably connected to the bottom of the fixing frame, and the bottom plate is connected to the PTC heating core via a thermally conductive adhesive.

[0012] Preferably, two limiting protrusions are connected to the top of the bottom plate, and the PTC heating core is located between the two limiting protrusions.

[0013] Preferably, the straight pipe is welded to the fixing frame, and the straight pipe is welded to the bent pipe.

[0014] A method for using a refrigerator evaporator with significant defrosting effect comprises the following steps: Step 1: After assembling the bent pipe, straight pipe, heat sink fins and mounting plate, apply thermal conductive glue on the outside of the PTC heating core, and then insert it into the mounting groove of the mounting plate to install the upper PTC heating core. Apply thermal conductive glue to the bottom of the PTC heating core and place it between the two limiting protrusions to fix the PTC heating core and the bottom plate, which is convenient for installing the lower PTC heating core; Step 2: When there is frost on the heat sink fins, the PTC heating core starts working, and the heat generated can quickly melt the frost in a short time with high efficiency.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is provided with multiple PTC heating cores, and the PTC heating cores are distributed in the heat dissipation fins. When a frost layer is attached to the heat dissipation fins, the heat generated by the PTC heating cores can quickly perform defrosting operations, shortening the defrosting time with high efficiency, effectively avoiding high temperature from damaging surrounding components, ensuring the electrical safety and reliability of the whole machine, and at the same time avoiding the refrigerator storage room temperature from rising too quickly, effectively avoiding food spoilage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front perspective view of the present invention; Figure 2 It is a schematic diagram of the connection structure between the bottom plate and the fixing frame of the present invention; Figure 3 It is a schematic diagram of the heat dissipation fin structure of the present invention; Figure 4 It is a left side view of the mounting plate of the present invention; Figure 5 A three-dimensional diagram of the mounting plate of the present invention; Figure 6 It is a schematic diagram of the connection structure between the mounting plate and the heat dissipation fins of the present invention; Figure 7 It is a schematic diagram of the structure of various installation methods of the PTC heating core of the present invention.

[0017] In the figure: 1. fixing frame; 2. bent pipe; 3. straight pipe; 4. heat dissipation fin; 5. mounting plate; 6. PTC heating core; 7. limiting protrusion; 8. bottom plate; 9. mounting hole one; 10. folded edge one; 11. folded edge two; 12. connecting groove; 13. distance plate; 14. processing hole; 15. mounting hole two; 16. mounting groove; 17. flange. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 6 The present invention provides a refrigerator evaporator with significant defrosting effect, including a fixed frame 1, a plurality of heat dissipation fins 4 and a plurality of straight tubes 3 are connected inside the fixed frame 1, the straight tubes 3 penetrate the heat dissipation fins 4, a bent tube 2 is connected between the upper and lower straight tubes 3, a plurality of PTC heating cores 6 are connected inside the fixed frame 1, the PTC heating cores 6 are fixedly connected to the heat dissipation fins 4, and the PTC heating cores 6 are inclined.

[0020] There are multiple layers of heat dissipation fins 4 in the fixed frame 1, and two PTC heating cores 6 are arranged on the heat dissipation fins 4, and are distributed front and back. When defrosting, the PTC heating core 6 starts to work, and the heat radiates from the inside to the outside, which can quickly melt the frost and achieve the internal disintegration of the frost with high efficiency and short time. It effectively prevents the surrounding components from being burned by high temperature, ensures the electrical safety and reliability of the whole machine, and at the same time prevents the refrigerator storage room temperature from rising too quickly, effectively preventing food from spoiling.

[0021] The installation method of the PTC heating core 6 can be selected according to the size of the evaporator, such as Figure 7 As shown in the figure, there are four installation methods. The first is that a PTC heating core 6 is provided on each layer of heat dissipation fins 4. The second is the interval distribution, with one, two or three layers between the upper and lower PTC heating cores 6. The third is the S-shaped distribution, with one, two or three layers between the upper and lower PTC heating cores 6. The fourth is that the PTC heating core 6 located at the bottom is installed more densely and is more sparsely located near the top, which is convenient for defrosting operations and improves defrosting efficiency. The corresponding installation method is selected according to the actual situation, which is less economical and has strong applicability.

[0022] The heating power of the PTC heating core 6 near the bottom is relatively large, that is, a high-power PTC heating core 6 is installed at the air inlet, and less or less low-power PTC heating core 6 is installed at the air outlet.

[0023] The heat dissipation fin 4 is provided with two connecting grooves 12, and the connecting groove 12 is connected to the mounting plate 5. The mounting plate 5 is provided with a second mounting hole 15 and a mounting groove 16. The second mounting hole 15 matches the straight tube 3. The mounting groove 16 is connected to the PTC heating core 6. The opening of the mounting groove 16 faces outward, which is convenient for inserting the PTC heating core 6 into the mounting groove 16 for installation and fixation.

[0024] The end of the mounting plate 5 is connected with a flange 17 , which guides the PTC heating core 6 , and can quickly introduce the PTC heating core 6 into the mounting groove 16 , thus shortening the installation time.

[0025] The two inner surfaces of the installation groove 16 are a, and the angle between the two a is 1-2°, which is not parallel. On the one hand, the PTC heating core 6 can be installed quickly, and on the other hand, a and the PTC heating core 6 can fit better to transfer heat evenly.

[0026] The connection groove 12 is connected with a folded edge 11 2 which is welded to the mounting plate 5 . The folded edge 11 2 can increase the contact area with the mounting plate 5 . The weld is longer, thereby improving the stability of the connection between the heat dissipating fin 4 and the mounting plate 5 .

[0027] The heat dissipation fin 4 is provided with a mounting hole 9, which matches the straight tube 3, and is connected with a folded edge 10, which is welded to the straight tube 3. The folded edge 10 can increase the contact area with the straight tube 3 and improve the stability of the connection between the heat dissipation fin 4 and the mounting plate 5.

[0028] The bottom of the fixed frame 1 is detachably connected to a base plate 8, and the base plate 8 is connected to the PTC heating core 6 by thermally conductive adhesive. The base plate 8 is placed in the water receiving tray, that is, the PTC heating core 6 is located in the water receiving tray. Frost and ice cubes fall into the water receiving tray, and the PTC heating core 6 quickly melts them. At the same time, the radiated heat is also transferred to the bottom frost layer of the evaporator, thereby accelerating the defrosting efficiency.

[0029] Two limiting protrusions 7 are connected to the top of the base plate 8, and the PTC heating core 6 is located between the two limiting protrusions 7. During installation, the PTC heating core 6 can be limited by the limiting protrusions 7, so that the PTC heating core 6 is in a suitable installation position to avoid skewing and deviation, thereby serving the purpose of auxiliary positioning.

[0030] Two processing holes 14 are provided on the heat sink 4, and the processing holes 14 are connected with the distance plates 13. The distance plates 13 can ensure that the distances between adjacent heat sink fins 4 are equal, especially for the heat sink fins 4 densely packed at the top, so as to achieve high installation efficiency without manual calibration.

[0031] The straight pipe 3 is welded to the fixed frame 1, and the straight pipe 3 is welded to the bent pipe 2, and the installation of the mounting plate 5 is also fixed by welding, realizing an integrated design, reducing thermal resistance, and significantly improving the cooling efficiency.

[0032] The multiple PTC heating cores 6 are connected in parallel via lead wires.

[0033] A method for using a refrigerator evaporator with significant defrosting effect comprises the following steps: Step 1: After the elbow 2, straight tube 3, heat sink fin 4 and mounting plate 5 are assembled, apply thermal conductive glue on the outside of the PTC heating core 6, and then insert it into the mounting groove 16 of the mounting plate 5 to install the upper PTC heating core 6. Apply thermal conductive glue to the bottom of the PTC heating core 6 and place it between the two limiting protrusions 7 to fix the PTC heating core 6 and the bottom plate 8, so as to facilitate the installation of the lower PTC heating core 6; Step 2: When there is a frost layer on the heat dissipation fins 4, the PTC heating core 6 is turned on to work, and the heat generated can quickly melt the frost layer in a short time with high efficiency.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A refrigerator evaporator with a significant defrosting effect, comprising a fixing frame (1), characterized in that: A plurality of heat dissipation fins (4) and a plurality of straight tubes (3) are connected inside the fixed frame (1); the straight tubes (3) penetrate the heat dissipation fins (4); a bent tube (2) is connected between the upper and lower straight tubes (3); a plurality of PTC heating cores (6) are connected inside the fixed frame (1); the PTC heating cores (6) are fixedly connected to the heat dissipation fins (4), and the PTC heating cores (6) are arranged at an angle.

2. A refrigerator evaporator with significant defrosting effect according to claim 1, characterized in that: The heat dissipation fin (4) is provided with two connection grooves (12), the connection grooves (12) are connected to a mounting plate (5), a second mounting hole (15) and a mounting groove (16) are provided in the mounting plate (5), the second mounting hole (15) matches the straight tube (3), and the mounting groove (16) is connected to a PTC heating core (6).

3. The refrigerator evaporator with significant defrosting effect according to claim 2, characterized in that: The end of the mounting plate (5) is connected with a flange (17).

4. The refrigerator evaporator with significant defrosting effect according to claim 2, characterized in that: The connection groove (12) is connected to a second folded edge (11), and the second folded edge (11) is welded to the mounting plate (5).

5. The refrigerator evaporator with significant defrosting effect according to claim 1, characterized in that: The heat dissipation fin (4) is provided with a mounting hole one (9), the mounting hole one (9) matches the straight tube (3), and the mounting hole one (9) is connected with a folded edge one (10), and the folded edge one (10) is welded to the straight tube (3).

6. The refrigerator evaporator with significant defrosting effect according to claim 1, characterized in that: The bottom of the fixing frame (1) is detachably connected to a bottom plate (8), and the bottom plate (8) is connected to the PTC heating core (6) via a heat-conducting adhesive.

7. A refrigerator evaporator with significant defrosting effect according to claim 6, characterized in that: Two limiting protrusions (7) are connected to the top of the bottom plate (8), and the PTC heating core (6) is located between the two limiting protrusions (7).

8. The refrigerator evaporator with significant defrosting effect according to claim 1, characterized in that: The straight pipe (3) is welded to the fixed frame (1), and the straight pipe (3) is welded to the bent pipe (2).

9. The method for using a refrigerator evaporator with significant defrosting effect according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: After the bent tube (2), the straight tube (3), the heat sink fins (4), and the mounting plate (5) are assembled, a thermal conductive adhesive is applied to the outer side of the PTC heating core (6), and the PTC heating core (6) is then inserted into the mounting groove (16) of the mounting plate (5) to install the upper PTC heating core (6). A thermal conductive adhesive is applied to the bottom of the PTC heating core (6), and the PTC heating core (6) is placed between the two limiting protrusions (7) to fix the PTC heating core (6) and the bottom plate (8), so as to facilitate the installation of the lower PTC heating core (6); Step 2: When a frost layer is attached to the heat dissipation fins (4), the PTC heating core (6) is turned on to generate heat that can quickly melt the frost layer in a short time with high efficiency.

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