Door body mounting device and refrigerator door body mounting and detecting method

Abstract

The invention relates to the field of refrigeration equipment, in particular to a door body mounting device and a refrigerator door body mounting and detecting method.The door body mounting device comprises a fixing frame used for being fixed to a refrigerator body and a limiting block connected to the front side of the fixing frame; the limiting block comprises a first limiting part extending in the transverse direction and a second limiting part vertically extending downwards from the first limiting part, the first limiting part is provided with a first limiting face extending in the transverse direction and used for limiting the position of the top face of the door body, and the second limiting part is provided with a second limiting face vertically arranged relative to the first limiting face. The second limiting face is used for limiting the position of the door body away from the side face of the hinge in the transverse direction. According to the door body installation device and the installation and detection method of the refrigerator door body, it can be guaranteed that the door body is installed at the correct position, and whether the position of the installed door body is correct or not can be detected.

Description

Technical Field

[0001] The invention relates to the field of refrigeration equipment, and in particular to a door installation device, and a method for installing and detecting a refrigerator door. Background Art

[0002] In the existing refrigerator production, the uneven height, uneven front and back, slanted and tilted doors are stubborn quality problems. The reason is that in the existing production process, the door is installed on the cabinet manually without any auxiliary devices. The installation position of the door is based on the subjective judgment of the operator. In the subsequent inspection process, there is also a lack of inspection equipment to detect the position of the door. This will cause defective products to enter the market and affect the reputation of the product. Summary of the invention

[0003] The object of the present invention is to provide a door installation device, a refrigerator door installation and detection method, which can install the door in a correct position and detect the position of the door.

[0004] To achieve the above-mentioned purpose, the present invention provides a door body installation device for installing the door body to the refrigerator body, including a fixing bracket for fixing to the body, and a limit block connected to the front side of the fixing bracket, the limit block including a first limit portion extending in a transverse direction, and a second limit portion extending vertically downward from the first limit portion, the first limit portion having a first limit surface extending in a transverse direction and used to limit the position of the top surface of the door body, the second limit portion having a second limit surface vertically arranged relative to the first limit surface, and the second limit surface being used to limit the position of the side of the door body away from the hinge in the transverse direction.

[0005] As a further improvement of the present invention, the first limiting portion extends to both sides of the second limiting portion in the transverse direction, the first limiting portion has a first limiting surface on both sides of the second limiting portion in the transverse direction, and the second limiting portion has a second limiting surface on both sides of the transverse direction.

[0006] As a further improvement of the present invention, the limit block also includes a connecting portion connecting the first limit portion and the fixed frame, the connecting portion having a third limit surface located at the rear side of the second limit portion and extending along the transverse direction, the third limit surface being arranged perpendicularly to the first limit surface, and being used to limit the position of the door body close to the side of the box body in the front-to-back direction.

[0007] As a further improvement of the present invention, the limit block also includes a locking portion extending from the connecting portion to below the fixing frame for being locked between the door body and the box body.

[0008] As a further improvement of the present invention, the fixed frame includes a frame body, adjustment blocks connected to both sides of the frame body in the transverse direction, the limit block is connected to the front side of the frame body, the adjustment block includes a sliding part slidably connected to the frame body along the transverse direction, and a clamping part extending downward from the sliding part, and the fixed frame also includes a fixing structure for fixing the relative position of the sliding part and the frame body.

[0009] As a further improvement of the present invention, the connecting portion and the fixing frame are detachably connected.

[0010] The present invention also provides a method for installing a refrigerator door, wherein the refrigerator is a single-door refrigerator, and the method uses the above-mentioned door installation device and comprises the following steps:

[0011] Connect the bottom of the door body to the first hinge located on one side in the width direction of the box body;

[0012] Fix the fixing frame to the box body, and make the limit block located at the diagonal position of the first hinge;

[0013] The top surface of the door body is fitted to the first limiting surface, and the side surface of the door body away from the first hinge in the width direction of the box body is fitted to the second limiting surface;

[0014] Use the second hinge to connect the top of the door and the box.

[0015] The present invention also provides another method for installing a refrigerator door, wherein the refrigerator is a double-door refrigerator, and the refrigerator includes a first door and a second door. The method uses the above-mentioned door installation device and includes the following steps:

[0016] Connect the bottoms of the first door body and the second door body to two first hinges located on both sides of the box body in the width direction respectively;

[0017] Fix the fixing frame to the box body, and make the limit block located between the first door body and the second door body;

[0018] The top surface of the first door body is made to fit on a first limiting surface, and the side surface of the first door body away from the first hinge in the width direction of the box body is made to fit on a second limiting surface;

[0019] Use a second hinge to connect the top of the first door body and the box body;

[0020] Make the top surface of the second door body fit with another first limiting surface, and make the side surface of the second door body away from the first hinge in the width direction of the box body fit with another second limiting surface;

[0021] Use the second hinge to connect the top of the second door body and the box body.

[0022] The present invention also provides a method for detecting a refrigerator door, wherein the refrigerator is a single-door refrigerator. The method uses the door installation device as described above and comprises the following steps:

[0023] Fix the fixing frame to the box body, and make the limit block located on the side of the door body away from the hinge in the width direction of the box body;

[0024] Determine whether the top surface of the door body and the side surface of the door body away from the hinge in the width direction of the box body can match the first limiting surface and the second limiting surface respectively;

[0025] If yes, it means the door is installed in the correct position;

[0026] If not, it means that the door is installed in the wrong position.

[0027] The present invention also provides another method for detecting a refrigerator door, wherein the refrigerator is a double-door refrigerator, and the refrigerator includes a first door and a second door. The method uses the above-mentioned door installation device and includes the following steps:

[0028] Fix the fixing frame to the box body, and make the limit block located between the first door body and the second door body;

[0029] Determine whether the top surface of the first door body and the side surface of the first door body away from the hinge in the width direction of the box body can match a first limiting surface and a second limiting surface respectively;

[0030] If yes, it means that the installation position of the first door body is correct;

[0031] If not, it means that the installation position of the first door body is wrong.

[0032] Determine whether the top surface of the second door body and the side surface of the second door body away from the hinge in the width direction of the box body can match with another first limiting surface and another second limiting surface respectively;

[0033] If yes, it means that the installation position of the second door body is correct;

[0034] If not, it means that the installation position of the second door body is wrong.

[0035] Beneficial effects of the present invention:

[0036] The present invention provides a door installation device and a refrigerator door installation and detection method, which can ensure that the door is installed at a correct position and can also detect whether the position of the installed door is correct. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the structure of the door installation device provided by the present invention when it is fixed to a refrigerator;

[0038] Figure 2 A schematic diagram of the structure of the door installation device provided by the present invention;

[0039] Figure 3 for Figure 2 Structural diagram of the middle limit block;

[0040] Figure 4 A schematic diagram of the exploded structure of the door installation device provided by the present invention;

[0041] Figure 5 This is a front view structural schematic diagram of the door body mounting device provided by the present invention when it is fixed to a refrigerator;

[0042] Figure 6 for Figure 5 The schematic diagram of the structure after the enlargement of A in the middle;

[0043] Figure 7 A schematic diagram of the side structure of the door mounting device provided by the present invention when it is fixed to a refrigerator;

[0044] Figure 8 for Figure 7 The schematic diagram of the structure after the enlargement of B in the middle;

[0045] Fig. 9 for Figure 7 The schematic diagram of the structure after enlargement at C in the middle;

[0046] Fig.10 It is a schematic diagram of the exploded structure of the refrigerator body, door body and second hinge. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the present invention, and any changes in mechanism, method, or function made by a person skilled in the art according to the embodiments are all within the protection scope of the present invention.

[0048] The terms used herein, such as "upper", "lower", "left", "right", "front", "back", etc., which indicate relative spatial positions, are used for the purpose of convenience to describe the relationship between one feature and another feature as shown in the accompanying drawings. It is understood that, depending on the placement of the product, the terms of relative spatial positions may be intended to include different orientations other than those shown in the drawings, and should not be construed as limitations on the claims. In addition, the descriptor "horizontal" used herein is not completely equivalent to being perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0049] like Figure 1As shown, the refrigerator 100 includes a box body 110, a compartment formed in the box body 110, and a door body 120 for opening and closing the compartment. An embodiment of the present invention provides a door body installation device 200, which is used to install the door body 120 to the box body 110 of the refrigerator 100 and ensure that the door body 120 can be accurately installed at a preset position. The door body 120 is generally connected to the door body 120 through two upper and lower hinges arranged on one side of the box body in the width direction, so that it can rotate relative to the box body 110 to open and close the compartment.

[0050] Continue with reference Figure 2-4 As shown in FIGS. 5-9, the door installation device 200 includes a fixing frame 10 for fixing to the box body 110, and a limiting block 20 connected to the front side of the fixing frame 10. The limiting block 20 includes a first limiting portion 21 extending in the transverse direction, and a second limiting portion 22 extending vertically downward from the first limiting portion 21. The first limiting portion 21 has a first limiting surface 211 extending in the transverse direction, and the second limiting portion 22 has a second limiting surface 221 vertically arranged relative to the first limiting surface 211. When the door body 120 is installed, the fixing frame 10 is fixed to the box body 110, the first limiting surface 211 can be fitted with the top surface of the door body 120 to define the position of the top surface of the door body 120, and the second limiting surface 221 can be fitted with the side of the door body 120 away from the hinge in the transverse direction to define the position of the side of the door body 120 away from the hinge in the transverse direction. In this way, the door body 120 can be limited to the correct position in the height direction and the transverse direction for installation.

[0051] It should be noted that, in the present invention, the transverse direction is the same as the width direction of the box body 110 and the door body 120. Figure 5 The left and right directions of the state shown are Figure 5 The up-down direction and the front-back direction of the state shown are Figure 7 Left and right orientation of the status shown.

[0052] As a preferred solution of this embodiment, the first limiting portion 21 extends to both sides of the second limiting portion 22 in the transverse direction, that is, the first limiting portion 21 and the second limiting portion 22 are generally in a "T" shape. In this case, the first limiting portion 21 has a first limiting surface 211 on both sides of the second limiting portion 22 in the transverse direction, and the second limiting portion 22 has a second limiting surface 221 on both sides of the transverse direction. The first limiting surface 211 and the second limiting surface 221 on both sides of the limiting block 20 in the transverse direction can respectively limit the position of a door body 120, so that the door body installation device 200 can be used for the installation of two opposing door bodies 120 in a double-door refrigerator 100. The double-door refrigerator is taken as an example in the drawings of the specification, but if only the matching of the limiting block 20 and one door body 120 is considered, it can be imagined that the door body installation device 200 is applied to a single-door refrigerator.

[0053] In this embodiment, the limit block 20 also includes a connecting portion 30 connecting the first limit portion 21 and the fixed frame 10. The connecting portion 30 has a third limit surface 31 located at the rear side of the second limit portion 22 and extending along the lateral direction. The third limit surface 31 is vertically arranged relative to the first limit surface 211, and can be used to limit the position of the door body 120 close to the side of the box body 110 in the front-to-back direction. In this way, the door body 120 can be limited to the correct position in the front-to-back direction for installation.

[0054] Furthermore, the limiting block 20 further includes a clamping portion 40 extending from the connecting portion 30 to the bottom of the fixing frame 10. When the door body 120 is installed, the fixing frame 10 is fixed to the box body 110, and the clamping portion 40 is clamped between the door body 120 and the box body 110. The two side surfaces of the clamping portion 40 in the front-to-back direction can respectively fit the door body 120 and the box body 110 to ensure the position of the door body 120 relative to the box body 110 in the front-to-back direction. The front side surface of the clamping portion 40 and the third limiting surface 31 should be in the same plane.

[0055] In this embodiment, the connecting part 30 is detachably connected to the fixing frame 10, and a plurality of limit blocks 20 can be designed according to the height and lateral position of the door bodies 120 of different refrigerators 100. When installing the door bodies 120 of different refrigerators 100, the limit blocks 20 can be replaced accordingly.

[0056] like Figure 2-4 As shown, the fixing frame 10 includes a frame body 11, an adjustment block 12 connected to both sides of the frame body 11 in the transverse direction, a limit block 20 connected to the front side of the frame body 11, and the adjustment block 12 includes a sliding portion 121 connected to the frame body 11 in a slidable manner in the transverse direction, and a clamping portion 122 extending downward from the sliding portion 121. The fixing frame 10 also includes a fixing structure for fixing the relative position of the sliding portion 121 and the frame body 11. The sliding of the sliding portion 121 in the transverse direction can enable the fixing frame 10 to be fixed on the box body 110 of the refrigerator 100 of different widths. After the sliding portion 121 slides to a suitable distance, the fixing structure fixes the relative position of the sliding portion 121 and the frame body 11, so that the adjacent sides of the two clamping portions 122 can clamp the two sides of the width direction of the box body 110 respectively, so that the fixing frame 10 can be fixed on the box body 110. In this embodiment, the distance between the adjacent sides of the two clamping portions 122 can be adjusted between three positions: 700 mm, 830 mm, and 905 mm.

[0057] The frame body 11 has a guide portion 111 extending in the transverse direction, and a guide groove 123 matching the guide portion 111 is provided in the adjustment block 12. The guide portion 111 and the guide groove 123 cooperate to stabilize the sliding trajectory of the adjustment block 12 relative to the frame body 11. The sliding portion 121 is also provided with a limiting groove 124 extending in the transverse direction and penetrating from the outer side surface of the adjustment block 12 to the guide groove 123. The frame body 11 is also provided with a protrusion 112 protruding from one side of the guide portion 111 into the limiting groove 124. When the adjustment block 12 slides to a certain position, the protrusion 112 can contact the side wall of the limiting groove 124 in the transverse direction. In this way, the sliding distance of the adjustment block 12 can be limited.

[0058] In this embodiment, the fixing structure includes a threaded hole 14 opened on the sliding part 121, a threaded member 15 threadedly connected to the threaded hole 14, and the threaded hole 14 passes through the outer side of the sliding part 121 to the guide groove 123, so that the tail end of the threaded member 15 can press against the guide part 111, thereby fixing the relative position of the sliding part 121 and the frame body 11, and the threaded member 15 is preferably a screw. The door body installation device 200 also includes a handle 13 connected to the frame body 11, so that the door body installation device 200 can be moved manually.

[0059] Continue with reference Figure 5-10 As shown, when the door body 120 is installed on the box body 110, it is connected to the box body 110 through a hinge, and the hinge includes a first hinge 130 and a second hinge 140. The bottom of the door body 120 is connected to the box body 110 through the first hinge 130, and the top is connected to the box body 110 through the second hinge 140, so as to realize the rotation of the door body 120 relative to the box body 110. The first hinge 130 can be first fixed to one side of the box body 110 in the width direction, and then the door body is connected to the first hinge 130. The present invention also provides a method for installing a refrigerator door, which uses the above-mentioned door installation device 200 and includes the following steps:

[0060] Connect the bottom of the door body 120 to the first hinge 130 located on one side of the box body 110 in the width direction;

[0061] Fix the fixing frame 10 to the box body 110, and make the limiting block 20 be located at the diagonal position of the first hinge 130;

[0062] The top surface of the door body 120 is attached to the first limiting surface 211, and the side surface of the door body 120 away from the first hinge 130 in the width direction of the box body 110 is attached to the second limiting surface 221;

[0063] The top of the door body 120 and the box body 110 are connected by using a second hinge 140 .

[0064] The above method can be used for the installation of the door body in a single-door refrigerator. In the above method, only the bottom of the door body 120 is connected to the box body 110 through the first hinge 130, and then the top surface of the door body 120 is attached to the first limiting surface 211, and the side of the door body 120 away from the first hinge 130 in the width direction of the box body 110 is attached to the second limiting surface 221, so that the door body 120 is limited to the correct position, and then the second hinge 140 is used to connect the top of the door body 120 and the box body 110, so that the door body 120 after installation can be kept in the correct position. After the door body 120 is installed, the door body installation device 200 can be manually removed. The above single-door refrigerator should be understood as the refrigerator 100 having a compartment opened and closed using a single door body 120, and is not limited to the entire refrigerator including only one door body 120.

[0065] The door body 120 has a decorative strip 123 at the top, and an axis hole 124 is opened on the decorative strip 123. The second hinge 140 includes a hinge body 131 and a connecting shaft 132 connected to the hinge body 131. When specifically connected, the hinge body 131 is fixed to the box body 110 by fasteners such as screws, and the connecting shaft 132 is placed in the axis hole 124. In this way, the second hinge 140 realizes the connection between the top of the door body 120 and the box body 110. After the bottom of the door body 120 is connected to the first hinge 130 located on one side in the width direction of the box body 110, the connecting shaft 132 of the second hinge 140 can be placed in the shaft hole 124 of the upper decorative strip 123 in advance, and when the top surface of the door body 120 is in contact with the first limiting surface 211, and the side of the door body 120 away from the first hinge 130 in the width direction of the box body 110 is in contact with the second limiting surface 221 to put the door body 120 in the correct position, use screws to fix the hinge body 131 to the box body 110, so that the second hinge 140 connects the top of the door body 120 and the box body 110.

[0066] In the double-door refrigerator 100, the door body 120 includes a first door body 121 and a second door body 122 respectively located on both sides of the width direction of the box body 110. The first door body 121 and the second door body 122 open and close the compartments on the side close to each other. When the first door body 121 and the second door body 122 are installed on the box body 110, the bottoms of the two are connected to the box body 110 by two first hinges 130 respectively, and the tops of the two are connected to the box body 110 by two second hinges 140 respectively.

[0067] The present invention also provides another method for installing a refrigerator door, which is an extension of the above-mentioned method for installing a single-door refrigerator door 120, and can be used to install a first door 121 and a second door 122 in a double-door refrigerator 100. The method uses the above-mentioned door installation device 200 and includes the following steps:

[0068] The bottoms of the first door body 121 and the second door body 122 are respectively connected to two first hinges 130 located on both sides of the box body 110 in the width direction;

[0069] Fix the fixing frame 10 to the box body 110, and make the limiting block 20 located between the first door body 121 and the second door body 122;

[0070] The top surface of the first door body 121 is attached to a first limiting surface 211, and the side surface of the first door body 121 away from the first hinge 130 in the width direction of the box body 110 is attached to the second limiting surface 221;

[0071] Use the second hinge 140 to connect the top of the first door body 121 and the box body 110;

[0072] The top surface of the second door body 122 is attached to another first limiting surface 211, and the side surface of the second door body 122 away from the first hinge 130 in the width direction of the box body 110 is attached to another second limiting surface 221;

[0073] Another second hinge 140 is used to connect the top of the second door body 122 and the box body 110 .

[0074] After the bottom of the first door body 121 and the second door body 122 are respectively connected to the two first hinges 130 located on the two sides in the width direction of the box body 110, the connecting shafts 132 of the two second hinges 140 can also be pre-placed in the shaft holes 124 of the decorative strips 123 of the first door body 121 and the second door body 122 respectively. The rest of the process is similar to the installation method of the door body of the above-mentioned single-door refrigerator, and will not be repeated here.

[0075] In the above method, since the first limiting portion 21 extends to both sides of the second limiting portion 22 in the lateral direction, the first limiting portion 21 has a first limiting surface 211 on both sides of the second limiting portion 22 in the lateral direction, and the second limiting portion 22 has a second limiting surface 221 on both sides in the lateral direction, that is, the first limiting surface 211 and the second limiting surface 221 on the same side can limit a door body, so the limiting portion can simultaneously limit the position of the first door body 121 and the second door body 122. In specific operations, the installation of the first door body 121 is completed first, and then the installation of the second door body 122 is completed. The above double-door refrigerator 100 should be understood as the refrigerator 100 having a compartment that is opened and closed using the first door body 121 and the second door body 122, and is not limited to the entire refrigerator only including the first door body 121 and the second door body 122. It can be seen that the sides of the first door body 121 and the second door body 121 away from the first hinge 130 are the sides of the two that are close to each other in the width direction of the box body 110 .

[0076] The door installation device 200 can also be used to detect the door 120 that has been installed to determine whether the installation position of the door 120 is correct. Specifically, the present invention provides a refrigerator door detection method, which uses the door installation device 200 and includes the following steps:

[0077] Fix the fixing frame 10 to the box body 110, and make the limiting block 20 be located on the side of the door body 120 away from the hinge in the width direction of the box body 110;

[0078] Determine whether the top surface of the door body 120 and the side surface of the door body 120 away from the hinge in the width direction of the box body 110 can match the first limiting surface 211 and the second limiting surface 221 respectively;

[0079] If yes, it means that the installation position of the door body 120 is correct;

[0080] If not, it means that the installation position of the door body 120 is wrong.

[0081] The above method can be used to detect the installation position of the door body in a single-door refrigerator. In the above method, if there is a gap between the top surface of the door body 120 and the first limiting surface 211, or between the side of the door body 120 away from the hinge in the width direction of the cabinet 110 and the second limiting surface 221, it means that the door body 120 is installed incorrectly, and the door body 120 needs to be removed from the first hinge 130 and the second hinge 140 and reinstalled.

[0082] The present invention also provides another method for installing a refrigerator door, which is an extension of the above-mentioned method for detecting a single-door refrigerator door, and can be used to detect whether the positions of the first door 121 and the second door 122 in the double-door refrigerator 100 are correct. The method uses the above-mentioned door installation device 200 and includes the following steps:

[0083] Fix the fixing frame 10 to the box body 110, and make the limiting block 20 located between the first door body 121 and the second door body 122;

[0084] Determine whether the top surface of the first door body 121 and the side surface of the first door body 121 away from the hinge in the width direction of the box body 110 can match a first limiting surface 211 and a second limiting surface 221 respectively;

[0085] If yes, it means that the installation position of the first door body 121 is correct;

[0086] If not, it means that the installation position of the first door body 121 is wrong.

[0087] Determine whether the top surface of the second door body 122 and the side surface of the second door body 122 away from the hinge in the width direction of the box body 110 can match with another first limiting surface 211 and another second limiting surface 221 respectively;

[0088] If yes, it means that the installation position of the second door body 122 is correct;

[0089] If not, it means that the installation position of the second door body 122 is wrong.

[0090] In the above method, since the first limiting portion 21 extends to both sides of the second limiting portion 22 in the lateral direction, the first limiting portion 21 has a first limiting surface 211 on both sides of the second limiting portion 22 in the lateral direction, and the second limiting portion 22 has a second limiting surface 221 on both sides of the lateral direction, that is, the first limiting surface 211 and the second limiting surface 221 on the same side can be used to detect the position of a door body, so the limiting portion can detect the positions of the first door body 121 and the second door body 122 at the same time.

[0091] In summary, the present invention provides a door installation device 200 and a method for installing and detecting a refrigerator door, which can ensure that the door 120 is installed in the correct position and can also detect whether the position of the installed door 120 is correct.

[0092] It should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0093] The above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A door installation device for installing a door to a refrigerator body, characterized in that: It includes a fixing frame for fixing to a box body, and a limiting block connected to the front side of the fixing frame, the limiting block includes a first limiting portion extending in a transverse direction, and a second limiting portion extending vertically downward from the first limiting portion, the first limiting portion has a first limiting surface extending in a transverse direction and used to limit the position of the top surface of the door body, the second limiting portion has a second limiting surface vertically arranged relative to the first limiting surface, and the second limiting surface is used to limit the position of the side of the door body away from the hinge in the transverse direction.

2. The door installation device according to claim 1, characterized in that: The first limiting portion extends to both sides of the second limiting portion in the transverse direction, the first limiting portion has a first limiting surface on both sides of the second limiting portion in the transverse direction, and the second limiting portion has a second limiting surface on both sides of the transverse direction.

3. The door installation device according to claim 1 or 2, characterized in that: The limit block also includes a connecting portion connecting the first limit portion and the fixed frame, and the connecting portion has a third limit surface located at the rear side of the second limit portion and extending along the transverse direction. The third limit surface is vertically arranged relative to the first limit surface, and is used to limit the position of the door body close to the side of the box body in the front-to-back direction.

4. The door installation device according to claim 3, characterized in that: The limiting block also includes a locking portion extending from the connecting portion to below the fixing frame for being locked between the door body and the box body.

5. The door installation device according to claim 1, characterized in that: The fixed frame includes a frame body, adjustment blocks connected to both sides of the frame body in the transverse direction, the limit block is connected to the front side of the frame body, the adjustment block includes a sliding part slidably connected to the frame body along the transverse direction, and a clamping part extending downward from the sliding part, and the fixed frame also includes a fixing structure for fixing the relative position of the sliding part and the frame body.

6. The door installation device according to claim 3, characterized in that: The connecting portion and the fixing frame are detachably connected.

7. A method for installing a refrigerator door, wherein the refrigerator is a single-door refrigerator, characterized in that: Using the door installation device as claimed in claim 1 includes the following steps: Connect the bottom of the door body to the first hinge located on one side in the width direction of the box body; Fix the fixing frame to the box body, and make the limit block located at the diagonal position of the first hinge; The top surface of the door body is fitted to the first limiting surface, and the side surface of the door body away from the first hinge in the width direction of the box body is fitted to the second limiting surface; Use the second hinge to connect the top of the door and the box.

8. A method for installing a refrigerator door, wherein the refrigerator is a double-door refrigerator, and the refrigerator comprises a first door and a second door, wherein: Using the door installation device as claimed in claim 2 includes the following steps: Connect the bottoms of the first door body and the second door body to two first hinges located on both sides of the box body in the width direction respectively; Fix the fixing frame to the box body, and make the limit block located between the first door body and the second door body; The top surface of the first door body is made to fit on a first limiting surface, and the side surface of the first door body away from the first hinge in the width direction of the box body is made to fit on a second limiting surface; Use a second hinge to connect the top of the first door body and the box body; Make the top surface of the second door body fit with another first limiting surface, and make the side surface of the second door body away from the first hinge in the width direction of the box body fit with another second limiting surface; The second door top is connected to the box body by using a second hinge.

9. A method for detecting a refrigerator door, wherein the refrigerator is a single-door refrigerator, characterized in that: Using the door installation device as claimed in claim 1 includes the following steps: Fix the fixing frame to the box body, and make the limit block located on the side of the door body away from the hinge in the width direction of the box body; Determine whether the top surface of the door body and the side surface of the door body away from the hinge in the width direction of the box body can match the first limiting surface and the second limiting surface respectively; If yes, it means the door is installed in the correct position; If not, it means that the door is installed in the wrong position.

10. A method for detecting a refrigerator door, wherein the refrigerator is a double-door refrigerator, and the refrigerator comprises a first door and a second door, wherein: Using the door installation device as claimed in claim 2 includes the following steps: Fix the fixing frame to the box body, and make the limit block located between the first door body and the second door body; Determine whether the top surface of the first door body and the side surface of the first door body away from the hinge in the width direction of the box body can match a first limiting surface and a second limiting surface respectively; If yes, it means that the installation position of the first door body is correct; If not, it means that the installation position of the first door body is wrong. Determine whether the top surface of the second door body and the side surface of the second door body away from the hinge in the width direction of the box body can match with another first limiting surface and another second limiting surface respectively; If yes, it means that the installation position of the second door body is correct; If not, it means that the installation position of the second door body is wrong.

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