Electric air door frame of air-cooled refrigerator

Abstract

The utility model discloses an electric air door frame of an air-cooled refrigerator and belongs to the technical field of air-cooled refrigerators. The rigid conductive plastic open square frame is formed by injection molding by taking a PA (Polyamide) carbon fiber composite conductive material as a heating base material; the rigid conductive plastic open square frame is positioned and fixed on the air door frame through a first convex column, a second convex column and a third convex column which are arranged on the air door frame and are provided with umbrella-shaped barbs, a baffle plate, a first positioning pin and a second positioning pin; the three convex columns and the tuyere surrounding edge form a cavity; the first section of frame strip located on the outer side of the long surrounding edge on the right side is wavy. The air door frame with the defrosting function is simple in defrosting structure, easy and convenient to assemble, high in universality, efficient, reliable and capable of easily achieving production automation.

Description

TECHNICAL FIELD

[0001] The utility model relates to air-cooled refrigerator technical field, especially air-cooled refrigerator electric air door frame. BACKGROUND

[0002] Air-cooled refrigerator electric air door is installed in air-cooled control channel, and the supply of cold air is regulated by controlling the opening and closing of air door.

[0003] The defrosting structure of the air-cooled refrigerator electric air door is to set silica gel heating wire outside the joint of the air door and the surrounding edge, which is a flexible part, difficult to install, high in manufacturing cost, and difficult to realize production automation. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of air-cooled refrigerator electric air door frame, it is provided with rigid conductive plastic open square frame outside the air port surrounding edge of contact connection with air door, the rigid conductive plastic open square frame is made into by using PA carbon fiber composite conductive material as heating base material and through injection molding, and in the first section of the open square frame, it uses wave-shaped frame strip, so, simple structure, strong universality, high production efficiency, assembly quick, reliable, efficient, and easy to realize production automation.

[0005] The technical solution provided by the utility model is as follows:

[0006] The utility model provides an air -cooled refrigerator electric air door frame, including air door frame, the rectangular air port is equipped with the surrounding edge of two long and the surrounding edge of two short of opposite in the lower central part of air door frame, and the air door is matched with the surrounding edge top contact connection, the short surrounding edge outside of air door frame is equipped with the baffle and vertical cylindrical first convex column and first positioning pin, second positioning pin respectively on the both sides of baffle on the air port upper end part, vertical cylindrical second convex column and third convex column are equipped with respectively on the air door frame outside of long surrounding edge lower part, and the outside of surrounding edge is equipped with the rigid conductive plastic open square frame with the surrounding edge shape matched contact connection, the opening part of rigid conductive plastic open square frame is equipped with the first connecting part with first terminal and the second connecting part with second terminal respectively, and the rigid conductive plastic open square frame is positioned and fixed in the cavity formed between first convex column, second convex column, third convex column and air port surrounding edge through first convex column, second convex column, third convex column and baffle, first positioning pin, second positioning pin, the first section frame strip of rigid conductive plastic open square frame is located in the left side long surrounding edge outside is wavy, and the second section frame strip of rigid conductive plastic open square frame is located in the right side long surrounding edge outside is linear, the rigid conductive plastic open square frame adopts PA carbon fiber composite conductive material and is compressed integrally, the first connecting part is equipped with first terminal, and the second connecting part is equipped with second terminal.

[0007] The frame strip of the rigid conductive plastic open square frame is square strip-shaped, and the first connecting part and the second connecting part are both flat plate-shaped; the cross-sectional area of the first connecting part and the second connecting part is 1.5-2 times larger than the cross-sectional area of the first section frame strip and the second section frame strip of the rigid conductive plastic open square frame. An insulating paint layer is coated on the outer surface of the rigid conductive plastic open square frame.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] (1) The utility model adopts PA carbon fiber composite conductive material as the heating base material of the rigid conductive plastic open square frame, can be made into various different shapes and matched rigid open square frames with the air port surrounding edge by injection molding, and since the first section frame strip 2-3 is wavy, it can be applied to various different specifications, capacities and air port sizes of air-cooled refrigerator electric air doors, and is also conducive to realizing production automation.

[0010] (2) Since the wind door frame air outlet surrounding edge perimeter of various different types and specifications of air-cooled refrigerator is quite different, but the electric power required for the wind door heating defrosting is basically the same, when the heating material for manufacturing the heating body is determined, the resistivity p is determined, and the cross-sectional area of the heating body is also determined, so the length of the rigid conductive plastic open frame can be designed according to the air outlet surrounding edge perimeter of the air-cooled refrigerator with the largest capacity; Since the left side long surrounding edge outer side space of the wind door frame is relatively wide, the first section of frame strip 2-3 is designed in a wave shape, and the frame strips of other sections are in a straight line, so that various different capacities of air-cooled refrigerator from the largest capacity to the smallest capacity can be matched and connected with the air outlet surrounding edge by changing the wave amplitude of the first section of frame strip 2-3 in a wave shape; Therefore, it has the advantages of strong universality, good processability, low production cost, high production efficiency and the like.

[0011] (3) The rigid conductive plastic open frame is positioned and fixed in the surrounding edge outer side cavity through the first convex column, the baffle, the second convex column and the third convex column, so it is convenient, reliable and efficient to operate, and is conducive to production automation. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of an air-cooled refrigerator electric wind door frame.

[0013] Figure 2 is Figure 1 E-E sectional view schematic diagram.

[0014] Figure 3 is Figure 1 D-D sectional view schematic diagram.

[0015] Figure 4 is Figure 1 the rigid conductive plastic open frame structure schematic diagram. DETAILED DESCRIPTION

[0016] The utility model will be further described in detail through the following examples.

[0017] Referring to Figures 1 to 4As shown, an electric air door frame of a forced air refrigerator comprises an air door frame 1, a rectangular air port 1-1 is arranged in the middle of the lower part of the air door frame 1, the air port 1-1 is provided with a surrounding edge 1-2 composed of two opposite long surrounding edges 1-2-1 and two opposite short surrounding edges 1-2-2, an air door is connected with the top of the surrounding edge 1-2 in a matching contact mode, a baffle 1-3, a vertically arranged cylindrical first protruding column 1-4, a first positioning pin 1-7 and a second positioning pin 1-2 are arranged on the air door frame 1 beside the outside of the short surrounding edge 1-2-2 of the upper end of the air port 1-1, a vertically arranged cylindrical second protruding column 1-5 and a third protruding column 1-6 are arranged on the air door frame 1 beside the outside of the lower part of the long surrounding edge 1-2-1, a rigid conductive plastic open square frame 2 is arranged on the outside of the surrounding edge 1-2 and is connected with the surrounding edge 1-2 in a matching contact mode, the open part of the rigid conductive plastic open square frame 2 is provided with a first connecting part 2-1 with a first connecting terminal 3-1 and a second connecting part 2-2 with a second connecting terminal 3-2, the rigid conductive plastic open square frame 2 is positioned and fixed in a cavity formed between the first protruding column 1-4, the second protruding column 1-5, the third protruding column 1-6 and the air port surrounding edge 1-2 through the first protruding column 1-4, the second protruding column 1-5, the third protruding column 1-6 and the baffle 1-3, the first positioning pin 1-7 and the second positioning pin 1-8, the first section frame strip 2-3 of the rigid conductive plastic open square frame 2 beside the outside of the left long surrounding edge 1-2-1 is in a wavy shape, the second section frame strip 2-4 beside the outside of the right long surrounding edge 1-2-2 is in a straight line shape, the rigid conductive plastic open square frame 2 is integrally compressed by using PA carbon fiber composite conductive material, the first connecting part 2-1 is provided with the first connecting terminal 3-1, and the second connecting part 2-2 is provided with the second connecting terminal 3-2.

[0018] The frame strip of the rigid conductive plastic open square frame 2 is in a square strip shape, the first connecting part 2-1 and the second connecting part 2-2 are both in a flat plate shape, and the cross-sectional area of the first connecting part 2-1 and the second connecting part 2-2 is 1.5-2 times larger than the cross-sectional area of the first section frame strip 2-1 and the second section frame strip 2-2 of the rigid conductive plastic open square frame 2.

[0019] The outer surface of the rigid conductive plastic open square frame 2 is coated with a layer of insulating paint.

[0020] The air door frame 1 is made of plastic injection molding, and the first connecting terminal 3-1 and the second connecting terminal 3-2 are both made of metal, for example, copper material.

[0021] The heating base material of the rigid conductive plastic open square frame 2 is PA carbon fiber composite conductive material, and the resistivity p = 3.6 x 10 -3Ω·m; the working voltage of the rigid conductive plastic open square frame 2 is DC 12V, and the electric power is 1W, which can meet the defrosting requirements of the electric air door. Since the rigid conductive plastic open square frame 2 has high brittleness, the cross-sectional area of the frame strip should not be too large, otherwise the length of the frame strip will increase, but it should not be too small, otherwise the frame strip will be easily broken and damaged. According to practical experience, the cross-sectional area of the frame strip is 5mm 2 left and right is the most appropriate. Through conventional calculation, the length of the frame strip of the rigid conductive plastic open square frame 2 is 200mm, which is slightly larger than the perimeter of the air-cooled refrigerator electric air door air port surrounding edge of the maximum capacity. By adjusting the amplitude of the first wave-shaped frame strip 2-3, it can be applied to various large, medium and small capacity air-cooled refrigerators, so it has strong versatility.

[0022] On the automatic production line, the mechanical hand puts the rigid conductive plastic open square frame 2 into the space formed by the baffle 1-3, the first protruding column 1-4, the first positioning pin 1-7, the second positioning pin 1-8, the surrounding edge 1-2, the second protruding column 1-5 and the third protruding column 1-6 on the air door frame, and at the same time, the umbrella-shaped barb is hot-pressed on the upper part of the first protruding column 1-4, the second protruding column 1-5 and the third protruding column 1-6. The first protruding column 1-4 and its umbrella-shaped barb are used to fix the rigid conductive plastic open square frame 2, and the second protruding column 1-5 and its umbrella-shaped barb and the third protruding column 1-6 and its umbrella-shaped barb are used to position and limit the rigid conductive plastic open square frame 2. There is a gap between the frame strip and the corresponding surrounding edge 1-2, the bottom plane of the second protruding column 1-5 and its umbrella-shaped barb, and the bottom plane of the third protruding column 1-6 and its umbrella-shaped barb, which is used to accommodate the cold shrinkage and thermal expansion amount of the rigid conductive plastic open square frame 2 when it changes from -40℃ to +70℃, to ensure that the rigid conductive plastic open square frame 2 will not be broken and will not be out of the defined position during operation.

[0023] The outer surface of the rigid conductive plastic open square frame 2 needs to be coated with a layer of insulating paint, which can slow down the aging of the conductive plastic in the humid environment of the refrigerator, and prevent the conductive plastic from increasing the resistivity due to water absorption, thereby causing the electric power of the rigid conductive plastic open square frame 2 to decrease, which seriously affects its defrosting effect.

[0024] The air door frame 1 equipped with the rigid conductive plastic open square frame 2 is tested and inspected: the air door frame 1 is dropped from 1.2m high to the cement floor in the drop test from three directions XYZ, and the rigid conductive plastic open square frame 2 in the air door frame 1 will not be broken and / or fall off. It exceeds the requirements of the drop test specified in the international GB / T35720-2017.

Claims

1. A motorized air door frame for a forced air refrigerator, comprising an air door frame (1) having a rectangular air opening (1-1) in the lower center portion, the air opening (1-1) having a surrounding edge (1-2) formed by two opposite long surrounding edges (1-2-1) and two opposite short surrounding edges (1-2-2), and an air door being in contact with the top of the surrounding edge (1-2), characterized in that: The air door frame (1) beside the outer side of the short surrounding edge (1-2-2) of the upper end of the tuyere (1-1) is provided with a baffle (1-3), a vertically arranged cylindrical first protruding column (1-4), and a first positioning pin (1-7) and a second positioning pin (1-8) respectively located on both sides of the baffle (1-3). The air door frame (1) beside the outer side of the lower part of the long surrounding edge (1-2-1) is respectively provided with a vertically arranged cylindrical second protruding column (1-5) and a third protruding column (1-6). A rigid conductive plastic open square frame (2) is provided on the outer side of the surrounding edge (1-2) and is in contact and connection with the shape of the surrounding edge (1-2). The opening part of the rigid conductive plastic open square frame (2) is respectively provided with a first connecting part (2-1) with a first wiring terminal (3-1) and a second connecting part (2-2) with a second wiring terminal (3-2). The rigid conductive plastic open square frame (2) is positioned and fixed in the cavity formed between the first protruding column (1-4), the second protruding column (1-5), the third protruding column (1-6), and the surrounding edge (1-2) of the air door by the first protruding column (1-4), the second protruding column (1-5), the third protruding column (1-6), the baffle (1-3), the first positioning pin (1-7), and the second positioning pin (1-8). The first section frame strip (2-3) beside the outer side of the long surrounding edge (1-2-1) on the left side of the rigid conductive plastic open square frame (2) is in a wave shape, and the second section frame strip (2-4) beside the outer side of the long surrounding edge (1-2-1) on the right side is in a straight line shape. The rigid conductive plastic open square frame (2) is made of PA carbon fiber composite conductive material and is integrally compressed. The first connecting part (2-1) is provided with a first wiring terminal (3-1), and the second connecting part (2-2) is provided with a second wiring terminal (3-2).

2. The electric damper housing for a forced air refrigerator according to claim 1, wherein: The frame strip of the rigid conductive plastic open square frame (2) is in a square strip shape, and the first connecting part (2-1) and the second connecting part (2-2) are both in a flat plate shape. The cross-sectional area of the first connecting part (2-1) and the second connecting part (2-2) is 1.5-2 times larger than the cross-sectional area of the first section frame strip (2-3) and the second section frame strip (2-4) of the rigid conductive plastic open square frame (2).

3. The electric damper housing of the air-cooled refrigerator according to claim 1, wherein: The outer surface of the rigid conductive plastic open square frame (2) is coated with a layer of insulating paint.

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