Refrigerator evaporator convenient to defrost

Abstract

The utility model discloses a refrigerator evaporator convenient to defrost, which comprises two frames, a plurality of straight pipes are connected between the two frames, bent pipes are connected between the adjacent straight pipes, a plurality of fins are arranged on the straight pipes, PTC (Positive Temperature Coefficient) heating cores are arranged on the side surfaces and the bottoms of the frames, two ends of each straight pipe are welded with the frames, and the two ends of each straight pipe are welded with the corresponding frame. The straight pipes are evenly distributed between the two frames, the distance between the fins is gradually increased from top to bottom, the bottoms of the frames are connected with a bottom plate, the bottom plate is connected with the PTC heating core through heat-conducting glue, the side faces of the frames are connected with an installation plate, and the installation plate is connected with the PTC heating core through heat-conducting glue. A mounting groove matched with the PTC heating core is formed in the inner side of the mounting plate, and the PTC heating core is attached to the fins. The defrosting efficiency can be improved, the defrosting time can be shortened, and the use is safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of evaporator technology, specifically to a refrigerator evaporator that facilitates defrosting. Background Technology

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature, and it is also a consumer product that keeps food or other items at a constant low temperature. The evaporator is an important heat exchange component in the refrigerator's refrigeration system. It is the device that outputs cooling capacity in the refrigeration unit, and it mainly "absorbs heat." Specifically, the evaporator takes the low-temperature, low-pressure refrigerant liquid sent by the capillary tube, absorbs the heat from the food inside the refrigerator, and evaporates it into saturated refrigerant vapor to achieve the purpose of refrigeration.

[0003] When a refrigerator is in use, opening the door allows outside air to enter. This outside air contains moisture, which will frost up on the evaporator, affecting the refrigerator's cooling efficiency. To remove frost from the evaporator, existing defrosting devices typically install heaters below the fins. The heat emitted by these heaters melts the frost on the evaporator. These heaters are usually made of steel pipes, glass tubes, or aluminum tubes. Steel pipe heaters reach very high temperatures, posing a fire hazard; glass tube heaters are easily broken, and their internal heating wires also reach high temperatures, increasing the risk of fire and reducing safety; aluminum tube heaters have insufficient power density, requiring very long tubes to meet requirements, resulting in low efficiency and high cost. Furthermore, since the heaters are located at the bottom, it takes a considerable amount of time to melt the frost layer on top, leading to low defrosting efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a refrigerator evaporator that facilitates defrosting, which has the advantages of improving the defrosting efficiency of the frost layer on the fins, shortening the defrosting time, and being safe and reliable to use, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a refrigerator evaporator that facilitates defrosting, comprising two frames, multiple straight pipes connected between the two frames, a bent pipe connected between adjacent straight pipes, and multiple fins provided on the straight pipes, with PTC heating cores provided on the sides and bottom of the frames.

[0006] Preferably, the two ends of the straight tube are welded to the frame, and the straight tube is evenly distributed between the two frames.

[0007] Preferably, the spacing between the fins gradually increases from top to bottom.

[0008] Preferably, the bottom of the frame is connected to a base plate, and the base plate is connected to the PTC heating core by thermally conductive adhesive.

[0009] Preferably, a mounting plate is connected to the side of the frame, and the mounting plate is connected to the PTC heating core by thermally conductive adhesive.

[0010] Preferably, the inner side of the mounting plate is provided with a mounting groove that matches the PTC heating core, and the PTC heating core is attached to the fins.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model has multiple PTC heating cores, with one PTC heating core located below the fins and the other PTC heating cores distributed on one side of the frame and attached to the fins, thereby improving defrosting efficiency, shortening defrosting time, and ensuring safe and reliable use. Attached Figure Description

[0012] Figure 1 This is a frontal perspective view of the present invention;

[0013] Figure 2 This is a top perspective view of the present invention.

[0014] In the diagram: 1. Frame; 2. Straight pipe; 3. Bend; 4. Fin; 5. Mounting plate; 6. Base plate; 7. PTC heating core; 8. Mounting slot. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1 to 2 This utility model provides a refrigerator evaporator that is easy to defrost, including two frames 1, multiple straight pipes 2 connected between the two frames 1, and bent pipes 3 connected between adjacent straight pipes 2. Multiple fins 4 are provided on the straight pipes 2, and PTC heating cores 7 are provided on the sides and bottom of the frames 1.

[0017] Multiple PTC heating cores 7 can be installed. A single PTC heating core 7 is located below the fins 4, while the others are located on one side of the fins 4. The appropriate number of PTC heating cores 7 is selected based on the size of the evaporator. When there are many side-mounted PTC heating cores 7, the spacing between adjacent PTC heating cores 7 is equal, allowing for rapid heating of the frost layer on the fins 4, improving defrosting efficiency, shortening defrosting time, and ensuring safe and reliable operation. The lower fins 4 are placed in a water collection tray, a prior art technology used to collect water generated during defrosting. Ice fragments generated during defrosting fall into the water collection tray and can be heated to melt. The power of the PTC heating cores 7 can be controlled in stages through a zoned heating structure. The lower fins 4 have a thicker frost layer, so the lower end of the PTC heating core 7 has a higher power output, generating more heat for rapid defrosting.

[0018] Multiple PTC heating elements 7 are connected by leads.

[0019] The two ends of the straight pipe 2 are welded to the frame 1 to improve the stability of the connection between the two, and the straight pipe 2 is evenly distributed between the two frames 1.

[0020] The spacing between the fins 4 gradually increases from top to bottom, and the fins 4 adopt a wave-shaped structure, which can increase the heat exchange effect.

[0021] The bottom of the frame 1 is connected to the base plate 6, which is connected to the PTC heating core 7 by thermally conductive adhesive, thereby improving the stability of the connection between the base plate 6 and the PTC heating core 7.

[0022] The side of the frame 1 is connected to the mounting plate 5, which is connected to the PTC heating core 7 by thermally conductive adhesive to make the two firmly connected.

[0023] The inner side of the mounting plate 5 is provided with a mounting groove 8 that matches the PTC heating core 7. The PTC heating core 7 is attached to the fins 4 to better transfer heat to the fins 4, which facilitates defrosting operations.

[0024] The PTC heating element 7 replaces traditional steel tube heaters, glass tube heaters, or aluminum tube heaters. It features automatic temperature control; when external factors cause significant temperature fluctuations, the PTC heating element 7, relying on changes in its material properties, can quickly adjust its heating power and automatically perform positive and negative temperature compensation to maintain a constant temperature. The PTC heating element 7 does not glow red or emit an open flame when heating, consumes no oxygen, has high safety performance, and is energy-efficient.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A refrigerator evaporator for easy defrosting, comprising two frames (1), characterized in that, Multiple straight pipes (2) are connected between the two frames (1), and a bend (3) is connected between adjacent straight pipes (2). Multiple fins (4) are provided on the straight pipes (2). PTC heating cores (7) are provided on the sides and bottom of the frame (1).

2. A refrigerator evaporator for easy defrosting according to claim 1, characterized in that, The two ends of the straight pipe (2) are welded to the frame (1), and the straight pipe (2) is evenly distributed between the two frames (1).

3. A refrigerator evaporator for easy defrosting according to claim 1, characterized in that, The spacing between the fins (4) gradually increases from top to bottom.

4. A refrigerator evaporator for easy defrosting according to claim 1, characterized in that, The bottom of the frame (1) is connected to a base plate (6), and the base plate (6) is connected to the PTC heating core (7) by thermally conductive adhesive.

5. A refrigerator evaporator for easy defrosting according to claim 4, characterized in that, The frame (1) is connected to a mounting plate (5) on its side, and the mounting plate (5) is connected to the PTC heating core (7) by thermally conductive adhesive.

6. A refrigerator evaporator for easy defrosting according to claim 5, characterized in that, The mounting plate (5) has an inner side with a mounting groove (8) that matches the PTC heating core (7), and the PTC heating core (7) is attached to the fin (4).

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