CN110081659B

CN110081659B - Door frame assembling structure of freezer and corner joint thereof

Info

Publication number: CN110081659B
Application number: CN201811074573.3A
Authority: CN
Inventors: 蔡雨霖
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-01-25
Filing date: 2018-09-14
Publication date: 2021-10-08
Anticipated expiration: 2038-09-14
Also published as: TWI637137B; CN110081659A; TW201932771A

Abstract

An assembling structure of a door frame of a freezer and a corner joint thereof comprise a corner joint and a pair of door frames. The corner joint comprises a pair of n-shaped joints and a pair of bent bodies, each n-shaped joint is provided with at least one penetrating hole, and each bent body is provided with a first tilting part at the joint. Each door frame comprises a joint groove and a butting part, wherein two ends of each joint groove are provided with a set of openings, each U-shaped connector and each bending body are sleeved on each joint groove through one set of openings of each door frame, each butting part butts against the top of each bending body, each U-shaped connector is positioned between each butting part and the side of each joint groove, a space is formed between each U-shaped connector and one side of each joint groove, which is provided with each butting part, and each door frame can be continuously pulled towards the direction of the joint part during locking to ensure that no gap is generated on the outer side of the joint part of the two door frames, so that the characteristics of preventing external water drops from flowing into the interior, beautifying the appearance and the like can be achieved.

Description

Door frame assembling structure of freezer and corner joint thereof

Technical Field

The invention relates to a door frame assembly structure of a refrigerator and a corner joint thereof, in particular to a door frame assembly structure of a refrigerator and a corner joint thereof, which can prevent a gap from being generated at the outer side of a joint where two door frames are positioned at corners.

Background

Referring to fig. 1-1 to 3, a conventional door frame assembly 1 for a freezer includes a corner connector 2 and a pair of door frames 3, wherein the corner connector 2 includes a pair of n-shaped connectors 20 and a pair of bent bodies 21 extending outward and bent downward at one end to be connected to the outside of each of the n-shaped connectors 20.

Wherein one end of one of the connectors 20 is vertically connected to one end of the other connector 20, the top of each connector 20 is flat, and each connector 20 comprises at least one through hole 200 and a groove 201 on the other side and communicating with the through hole 200, and each groove 201 is communicated and connected with a collecting part 202.

One end of one of the bending bodies 21 is vertically connected to one end of the other bending body 21, and each bending body 21 is straight and flat. Each door frame 3 includes a joint groove 30, the bottom side of each joint groove 30 is open, and a set of openings 31 are formed at two ends of each joint groove 30.

In practice, the worker first fits each of the connectors 20 and each of the bent bodies 21 into each of the engaging grooves 30 through one of the openings 31 of each of the door frames 3, and the top surface of each of the connectors 20 abuts against the middle cross member 32 of each of the engaging grooves 30, and each of the grooves 201 faces outward. Then, a plurality of screws respectively extend through each of the through holes 200 from each of the grooves 201 toward each of the engaging grooves 30 and penetrate through the corresponding screw holes of each of the cross members 32, so that each of the screws is screwed into each of the screw holes to connect and fix each of the door frames 3 with the corner connectors 2. The wires electrically connecting the electrical components on the freezer are thereafter collected in the channel 201 and rest on the collection portion 202.

When each screw is pressed to tightly break each n-shaped connector 20, two sides of the corner extend towards the direction of each screw locking prescription, so that the joint of the n-shaped connectors 20 is deviated to generate a gap at the outer side of the joint 33 of the door frame 3, thereby not only affecting the appearance, but also easily allowing the external water to flow to the inside through the gap of the joint 33, and further improving the necessity.

Disclosure of Invention

The invention aims to provide a door frame assembling structure of a freezer and a corner joint thereof, wherein a first tilting part is arranged at the joint of each bending body, each door frame is provided with a joint groove and a butting part, each bending body is butted against the butting part to ensure that a space is formed between the top of each U-shaped joint body and one side of each joint groove provided with each butting part by utilizing the first tilting part, and each door frame at two sides can be continuously pulled towards the joint direction during locking to ensure that no gap is generated at the outer side of the joint of the two door frames, thereby preventing external water drops from flowing into the interior, achieving the characteristics of attractiveness and the like.

In accordance with the above objects, the present invention provides an assembling structure of a door frame of a freezer, which includes a corner joint and a pair of door frames. The corner joint comprises a pair of n-shaped joints and a pair of bending bodies which respectively extend outwards and are connected with the lower part of the outer side of each n-shaped joint in a bending way with one end downwards, wherein one end of one n-shaped joint is vertically connected with one end of the other n-shaped joint, each n-shaped joint is provided with at least one penetrating hole, one end of one bending body is vertically connected with one end of the other bending body, and each bending body is provided with a first tilting part at the joint.

Each door frame comprises a joint groove and an abutting part which is accommodated in the joint groove and connected to the middle side of the joint groove. Wherein, the bottom side of each joint groove is open, two ends of each joint groove are provided with a set of openings, each abutting part protrudes towards the direction of the opening of the bottom side, each reverse-U-shaped connector and each bending body are sleeved in each joint groove through one set of openings of each door frame, each abutting part abuts on the top of each bending body, each reverse-U-shaped connector is positioned between each abutting part and the side of each joint groove, and a distance is formed between the top of each reverse-U-shaped connector and one side of each joint groove provided with each abutting part.

Furthermore, the angle of each first tilting part is 0.5-2 degrees.

Furthermore, a second tilting portion, a flat portion and the first tilting portion are sequentially disposed from the outer end to the joint portion of the outer side of each bending body.

Further, the angle of each second tilting part is 0.5-2 degrees.

Furthermore, the top of each U-shaped connector is gradually inclined from the outer end to the connection position.

Furthermore, the distance between the top of each U-shaped connector and the top of each bent body is gradually decreased from 3.4 mm to 2.8 mm.

Furthermore, the top of each connector is inclined inward and downward near the joint, so that a first slope section at the outer side and a second slope section at the inner side are formed at the top of each connector, and each second slope section comprises at least one through hole.

Further, the inward downward inclination angle of each second slope section is set to 0.5-2 °.

Furthermore, the invention provides a corner joint of a door frame of a freezer cabinet, which is applied to a door frame assembling structure of the freezer cabinet and comprises a corner joint, wherein the corner joint comprises a pair of n-shaped connectors and a pair of bending bodies, one end of each bending body extends outwards and is connected with the lower part of the outer side of each n-shaped connector in a bending way, one end of one n-shaped connector is vertically connected with one end of the other n-shaped connector, each n-shaped connector is provided with at least one penetrating hole, one end of one bending body is vertically connected with one end of the other bending body, and each bending body is provided with a first tilting part at the joint.

Furthermore, the angle of each first tilting part is 0.5-2 degrees.

Further, the angle of each second tilting part is 0.5-2 degrees.

The invention is characterized in that:

1. when each abutting part abuts against the top of each bending body, the distance is formed between the top of each U-shaped connector and one side of each joint groove, which is provided with each abutting part, by each first tilting part. When a plurality of screws respectively penetrate through each penetrating hole from the other side to each joint groove, the material of each door frame corresponding to each screw moves towards each inverse-U-shaped joint body to gradually reduce each distance, and at the moment, one end of each door frame close to the joint part moves towards the joint part to be connected, so that the outer side of the joint part where the two door frames are connected cannot generate a gap, external water drops can be prevented from flowing into the interior, and the door frame is attractive.

2. And then, the second tilting part, the leveling part and the first tilting part are sequentially arranged on the outer side of each bending body from the outer end to the joint, the original distance of each distance is increased by the second tilting part, the distance space between each n-shaped connector and one side of each abutting part arranged in each joint groove is increased, namely, more materials at the position, corresponding to each screw, of each door frame can move towards each n-shaped connector, and gaps can not be generated on the outer side of the joint where the two door frames are connected.

3. Furthermore, the top of each of the connectors is formed into an inclined shape gradually decreasing from the outer end to the joint, so that the distance between each of the connectors and the side of each of the engaging grooves where each of the abutting portions is disposed is gradually increased. When the screws are locked, the distance between each n-shaped connector and one side of each abutting part arranged on each joint groove is larger at the joint, which means that more materials at the position of each door frame corresponding to each screw can move towards each n-shaped connector, and at the moment, one end of each door frame close to the joint moves towards the joint more and does not generate gaps at the outer side of the joint of the two door frames.

4. Because the inner side of the joint is difficult to process, the top of each connector is further provided with the first slope section and the second slope section, so that a larger space is formed between the inner side of each connector and one side of each joint groove provided with each abutting part. When the screws are locked, the material of each door frame corresponding to each screw moves towards each inverted U-shaped connector to gradually reduce each interval, and because the space between each second slope section and one side of each joint groove provided with each abutting part is larger, more material of each door frame corresponding to each screw moves towards each inverted U-shaped connector, at the moment, one end of each door frame close to the joint part moves towards the inner side of the joint part more, and no gap is generated on the inner side of the joint part of the two door frames.

Drawings

Fig. 1-1 is a perspective view of a corner joint in a door frame assembly of a conventional freezer.

Fig. 1-2 is a cross-sectional view of fig. 1-1 at a location a-a.

Fig. 2 is an exploded perspective view of a corner joint and a door frame of a conventional door frame assembly structure of a freezer.

Fig. 3 is a sectional view of a rotary joint and a door frame of a conventional door frame assembly structure of a freezer.

Fig. 4-1 is a perspective view of a corner joint in the door frame assembly of the freezer of the present invention.

Fig. 4-2 is a cross-sectional view of fig. 4-1 at location B-B.

Fig. 4-3 is an enlarged view of a portion of fig. 4-2 at position C.

Fig. 4-4 is an enlarged view of a portion of fig. 4-2 at position D.

Fig. 5 is an exploded perspective view of the corner joint and the door frame of the door frame assembly of the freezer of the present invention.

Fig. 6-1 is a perspective view of the corner joint and the door frame of the door frame assembly of the freezer of the present invention.

FIG. 6-2 is a cross-sectional view of the screw assembly of FIG. 6-1 at position E-E.

FIG. 6-3 is a schematic cross-sectional view of the screw assembly of FIG. 6-1 at position E-E (second).

Fig. 7-1 is a perspective view of the corner joint and the door frame of the door frame assembly of the freezer of the present invention.

Fig. 7-2 is a cross-sectional view of fig. 7-1 assembled with the screw at position F-F.

FIG. 7-3 is a cross-sectional view of the screw assembly of FIG. 7-1 at position G-G.

Fig. 7-4 is a cross-sectional view of the screw assembly of fig. 7-1 at position G-G (second).

Wherein the reference numerals are:

door frame assembly structure 1 corner joint 2 of freezer

Hole 200 for penetrating the connector 20

Groove 201 collection portion 202

Bending body 21 door frame 3

Engaging groove 30 and receiving opening 31

The connecting part 33 of the transverse material 32

Door frame assembling structure 4 corner joint 5 of freezer

Penetration hole 60 of reverse-U-shaped connector 6

Collecting part 62 of groove 61

Outer end 63 and top 64

First slope segment 640 second slope segment 641

First raised part 70 of bending body 7

Flat portion 71 and second raised portion 72

Outer end 73 door frame 8

Engaging groove 80 abutting portion 81

Sleeve opening 82 horizontal material 83

Spacing 84 screw hole 85

Splice 86 spacer 87

The angles theta 1, theta 2 and theta 3 of the screw 9

Heights H1, H2

Detailed Description

The purpose, technical content, features and efficacy of the present invention will be more readily understood by the following detailed description of the combination and use of the structures of the present invention with the accompanying drawings.

Referring to fig. 4-1 to 5 and 6-2, a door frame assembly structure 4 of a freezer according to the present invention includes a corner connector 5 and a door frame 8 made of a material softer than the corner connector 5. The corner connector 5 comprises a pair of connectors 6 and a pair of bent bodies 7 extending outward and bent downward at one end to connect with the outside of each connector 6.

Wherein one end of one of the connectors 6 is vertically connected to one end of the other connector 6, each connector 6 has at least one through hole 60 and a groove 61 on the other side communicating with each through hole 60. Wherein the groove 61 of one of the n-shaped connectors 6 is communicated with the groove 61 of the other one of the n-shaped connectors 6, and at least one collecting part 62 is arranged in at least one of the grooves 61, and wires electrically connected with electrical components on the freezer can be collected in the groove 61 and lean on the collecting part 62.

One end of one of the bent bodies 7 is vertically connected to one end of the other bent body 7, and a first raised portion 70 is disposed at a joint of each bent body 7, and an angle Θ 1 of each first raised portion 70 is 0.5-2 °.

Each door frame 8 includes an engaging groove 80 and an abutting portion 81 received in the engaging groove 80 and connected to the middle rail 83 of the engaging groove 80. Wherein, the bottom side of each joint groove 80 is open, and a set of openings 82 are formed at two ends of each joint groove 80, and each abutting portion 81 protrudes towards the opening direction of the bottom side. Each of the connectors 6 and each of the bent bodies 7 are sleeved into each of the engaging grooves 80 through one of the openings 82 of each of the door frames 8, each of the abutting portions 81 abuts against the top of each of the bent bodies 7, each of the connectors 6 is located between each of the abutting portions 81 and the side of each of the engaging grooves 80, and a space 84 is formed between the top 64 of each of the connectors 6 and one of the cross members 83 of each of the engaging grooves 80 where each of the abutting portions 81 is located.

Referring to fig. 5 to 7-2, each door frame 8 and the corner connector 5 are assembled, each abutting portion 81 is disposed to abut on the top of each bent body 7, and each gap 84 is formed between the top 64 of each connector 6 and the cross member 83 of each engaging groove 80, which is provided with each abutting portion 81, by each first raised portion 70. After a plurality of screws 9 respectively extend from each of the grooves 61 to each of the engaging grooves 80 and through each of the extending holes 60, a screw hole 85 is formed through a corresponding portion of each of the cross members 83.

Then, each screw 9 is moved toward each rail 83, and the material of each door frame 8 corresponding to each screw 9 is moved toward each U-shaped connector 6 because it is softer than the corner connector 5, so that each space 84 is gradually reduced. At this time, one end of each door frame 8 close to the joint 86 moves toward the joint 86 to connect, so that no gap is generated outside the joint 86 where the two door frames 8 are connected, thereby preventing external water drops from flowing into the interior and achieving the characteristics of beauty and the like.

Further, as shown in fig. 4-1 to 7-2, in an embodiment, a second tilted portion 72, a flat portion 71 and the first tilted portion 70 are sequentially disposed from the outer end 73 to the joint 86 outside each of the bent bodies 7, wherein an angle Θ 2 of each of the second tilted portions 72 is 0.5 ° to 2 °. The invention is that the second tilting part 72, the flat part 71 and the first tilting part 70 are sequentially arranged from the outer end 73 to the joint 86 outside each bending body 7, the first tilting part 70 can make the original distance of each distance 84 from small to large, and the distance space between each inverted-U-shaped connector 6 and each joint groove 80 provided with the cross material 83 at one side of each abutting part 81 is enlarged, namely, more materials at the position of each door frame 8 corresponding to each screw 9 can move towards each inverted-U-shaped connector 6, and gaps can not be generated at the outer side of the joint 86 connected with the door frame 8.

Further, in one embodiment, referring to FIGS. 4-1-7-2, the top 64 of each of the connectors 6 is tapered from the outer end 63 to the junction 86, i.e., from the height H2 at the outer end 63 to the height H1 at the inner end. In this embodiment, the distance between the top 64 of each of the pi-shaped connectors 6 and the top of each of the bent connectors 7 is gradually decreased from 3.4 mm to 2.8 mm. The top 64 of each U-shaped connector 6 is arranged to be inclined gradually from the outer end 63 to the joint 86, so that the distance between each U-shaped connector 6 and each cross member 83 at one side of each abutting part 81 arranged in each joint groove 80 is gradually increased. When the screws 9 are locked, since the distance between each of the connectors 6 and the cross bar 83 of each of the abutting portions 81 of each of the engaging grooves 80 is greater at the connecting portions 86, it means that more material is moved toward each of the connectors 6 at the positions of each of the door frames 8 corresponding to each of the screws 9, and at this time, one end of each of the door frames 8 near the connecting portions 86 is moved toward the connecting portions 86 more and a gap is not generated at the outer sides of the connecting portions 86 where the door frames 8 are connected.

Further, referring to fig. 4-1 to 7-4, the top 64 of each of the connectors 6 is inclined inward and downward by an angle Θ 3 near the joint 86, such that the top 64 of each of the connectors 6 forms a first slope segment 640 at the outer side and a second slope segment 641 at the inner side, each of the first slope segment 640 and the second slope segment 641 respectively faces different angles, and each of the second slope segments 641 has at least one through hole 60. In this embodiment, each of the n-shaped connectors 6 has two through holes 60, wherein one through hole 60 is disposed on the first slope segment 640, and the other through hole 60 is disposed on the second slope segment 641, but the invention is not limited thereto.

Because the top 64 of each of the connectors 6 is formed with the first slope segment 640 and the second slope segment 641, and the inward inclination angle of the second slope segment 641 is larger than that of the first slope segment 640, the inner side of each connector 6 and each of the connecting grooves 80 are provided with a space 87 with another angle and larger space between the cross members 83 at one side of each abutting portion 81. Wherein, the inward downward inclination angle Θ 3 of each second slope segment 641 is set to 0.5 ° to 2 °.

When the screws 9 are locked, the material of each door frame 8 corresponding to each screw 9 moves toward each of the connectors 6 to gradually reduce each of the gaps 87, and since the space between each second slope segment 641 and each of the engaging grooves 80 and the gap 87 between the cross members 83 at one side of each of the abutting portions 81 is large, more material of each door frame 8 corresponding to each screw 9 moves toward each of the connectors 6, and at this time, one end of each door frame 8 close to the connector 86 moves toward the inner side of the connector 86 to prevent gaps from being generated at the inner side of the connector 86 where the door frame 8 is connected.

In summary, the following features can be achieved through the above technical features:

1. when each abutting portion 81 abuts on the top of each bending body 7, the first tilting portion 70 makes the space 84 formed between the top 64 of each n-shaped connector 6 and the cross bar 83 of each abutting portion 81 at one side of each engaging groove 80. When each screw 9 passes through each penetrating hole 60 from the other side to each engaging groove 80, the material of each door frame 8 corresponding to each screw 9 moves toward each n-shaped connector 6 to gradually reduce each distance 84, and at this time, one end of each door frame 8 near the connecting part 86 moves toward the connecting part 86 to be connected, so that no gap is generated outside the connecting part 86 where the two door frames 8 are connected, thereby preventing external water drops from flowing into the interior and achieving the characteristics of beauty and the like.

2. The second tilted part 72, the flat part 71 and the first tilted part 70 are sequentially arranged from the outer end 73 to the joint 86 outside each bent body 7, the first tilted part 70 increases the original distance of each distance 84, the distance space between each inverted-U-shaped connector 6 and the cross material 83 on one side of each abutting part 81 arranged in each joint groove 80 increases, that is, more material at the position of each door frame 8 corresponding to each screw 9 moves towards each inverted-U-shaped connector 6, and gaps are not generated at the outer side of the joint 86 where the two door frames 8 are connected.

3. Furthermore, the top 64 of each of the connectors 6 is inclined gradually from the outer end 63 to the joint 86, so that the distance between each of the connectors 6 and each of the grooves 80 has a cross member 83 at one side of each of the abutting portions 81, which is gradually increased. When the screws 9 are locked, since the distance between each of the connectors 6 and the cross bar 83 of each of the abutting portions 81 of each of the engaging grooves 80 is greater at the connecting portions 86, it means that more material is moved toward each of the connectors 6 at the positions of each of the door frames 8 corresponding to each of the screws 9, and at this time, one end of each of the door frames 8 near the connecting portions 86 is moved toward the connecting portions 86 more and a gap is not generated at the outer sides of the connecting portions 86 where the door frames 8 are connected.

4. Because the inside of the connection portion 86 is difficult to handle, the top 64 of each of the connectors 6 is further provided with the first slope section 640 and the second slope section 641, so that the space 87 is formed between the inside of each of the connectors 6 and the cross member 83 of each of the abutting portions 81 of each of the engaging grooves 80. And each second slope section 641 has at least one through hole 60, when the screws 9 are locked, the material of each door frame 8 corresponding to each screw 9 will move toward each n-shaped connector 6 to make each interval 87 gradually decrease, because the space of the interval 87 between each second slope section 641 and each joint groove 80 provided with the cross material 83 at one side of each abutting portion 81 is larger, more material of each door frame 8 corresponding to each screw 9 will move toward each n-shaped connector 6, at this time, one end of each door frame 8 close to the joint 86 will move toward the inner side of the joint 86 more, and no gap will be generated at the inner side of the joint 86 where the two door frames 8 are connected.

However, the foregoing is only a preferred embodiment of the present invention, which is for the purpose of enabling those skilled in the art to understand the present invention and to implement the invention, and is not intended to limit the scope of the invention; therefore, it is intended that all equivalent changes or modifications in the shape, structure and characteristics described in the claims of the present invention are included in the scope of the claims of the present invention.

Claims

1. A door frame assembly structure of a freezer is characterized in that the door frame assembly structure of the freezer comprises:

a corner joint, which comprises a pair of reverse-U-shaped connectors and a pair of bending bodies respectively extending outwards and bending downwards at one end to be connected with the lower part of the outer side of each reverse-U-shaped connector, wherein one end of one reverse-U-shaped connector is vertically connected with one end of the other reverse-U-shaped connector, each reverse-U-shaped connector is provided with at least one penetrating hole, and one end of one bending body is vertically connected with one end of the other bending body; and

each door frame comprises a joint groove and an abutting part which is accommodated in the joint groove and connected to the middle side of the joint groove; wherein, the bottom side of each joint groove is open and two ends of each joint groove are provided with a set of openings, each abutting part protrudes towards the direction of the opening of the bottom side, each reverse-U-shaped connector and each bending body are sleeved in each joint groove through one set of openings of each door frame, each abutting part abuts on the top of each bending body, each reverse-U-shaped connector is positioned between each abutting part and the side of each joint groove, and a distance is formed between the top of each reverse-U-shaped connector and one side of each joint groove provided with each abutting part;

the connecting position of the door frames is a connecting position, a first tilting part is arranged at the connecting position of each bending body, and a flat part and the first tilting part are sequentially arranged from the outer end to the connecting position of the outer side of each bending body.

2. The door frame assembly structure of a freezer cabinet as claimed in claim 1, wherein the angle of each first raised portion raised with respect to the flat portion is 0.5 ° to 2 °.

3. The door frame assembly structure of freezer according to claim 1 or 2, wherein a second raised portion, the flat portion and the first raised portion are sequentially disposed from the outer end to the joint of the outer side of each bent body.

4. The door frame assembly structure of freezer door according to claim 3, wherein the angle of each second raised portion raised with respect to the flat portion is 0.5 ° to 2 °.

5. The door frame assembly of a freezer as claimed in claim 1, wherein the top of each of the n-shaped connectors is inclined gradually from the outer end to the junction.

6. The door frame assembly according to claim 5, wherein the distance between the top of each of the n-shaped connectors and the top of each of the n-shaped connectors is gradually decreased from 3.4 mm to 2.8 mm.

7. The door frame assembly according to claim 5, wherein the top of each of the connectors is further inclined inward and downward near the connection portion, such that the top of each of the connectors has a first slope section located at an outer side and a second slope section located at an inner side, and each of the second slope sections has at least one through hole.

8. The freezer door frame assembly structure of claim 7, wherein each of the second sloped sections has an inwardly sloped angle of 0.5 ° to 2 °.

9. The utility model provides an use freezer door frame corner joint at freezer door frame package assembly which characterized in that, this freezer door frame corner joint contains:

a corner joint, which comprises a pair of reverse-U-shaped connectors and a pair of bending bodies respectively extending outwards and bending downwards at one end to be connected with the lower part of the outer side of each reverse-U-shaped connector, wherein one end of one reverse-U-shaped connector is vertically connected with one end of the other reverse-U-shaped connector, each reverse-U-shaped connector is provided with at least one penetrating hole, one end of one bending body is vertically connected with one end of the other bending body, each bending body is provided with a first tilting part at a joint, and the outer side of each bending body is sequentially provided with a flat part and the first tilting part from the outer end to the joint;

wherein the connection position is a position where one end of one of the connectors is vertically connected with one end of the other connector.

10. The corner joint of a freezer door frame of claim 9, wherein each first raised portion is raised at an angle of 0.5 ° to 2 ° relative to the flat portion.

11. The corner joint of freezer door frame according to claim 9 or 10, wherein a second raised portion, the flat portion and the first raised portion are sequentially disposed from the outer end to the joint of the outer side of each bent body.

12. The corner joint of a freezer door frame of claim 11, wherein each second raised portion is raised at an angle of 0.5 ° to 2 ° relative to the flat portion.

13. The corner fitting of a door frame for a refrigerator according to claim 9, wherein the top of each of the n-shaped fittings is inclined gradually from the outer end to the junction.

14. The corner fitting of a cabinet door frame for a refrigerator according to claim 13, wherein the distance between the top of each n-shaped fitting and the top of each n-shaped fitting is gradually decreased from 3.4 mm to 2.8 mm.

15. The corner joint of freezer door frame according to claim 13, wherein the top of each n-shaped connector is further inclined inward and downward near the joint, such that the top of each n-shaped connector is formed with a first slope section at the outer side and a second slope section at the inner side, and each second slope section comprises at least one through hole.

16. The freezer door frame corner joint of claim 15, wherein each of the second sloped sections has an inwardly downwardly sloped angle of 0.5 ° to 2 °.