Positioning device for refrigerator test

Abstract

The utility model relates to the technical field of refrigerator testing equipment, and discloses a positioning device for refrigerator testing. The positioning device comprises a bottom plate, a peripheral side plate, a first distance measuring module and an image distance measuring module, wherein the bottom plate comprises a first bottom plate, a first connecting plate and a second bottom plate which are connected in a bending manner, the first bottom plate abuts against the top wall of the refrigerator to be tested, and the first connecting plate abuts against the right side wall of the refrigerator to be tested; the peripheral side plate comprises a first side plate extending in the vertical direction, the bottom end of the first side plate is provided with an inclined side plate extending downwards in the direction away from the first side plate, the inclined side plate is connected with the first bottom plate through a second connecting plate, and the second connecting plate abuts against the rear side wall of the refrigerator to be tested; the first distance measuring module is arranged on the second bottom plate and used for measuring the distance between the second bottom plate and the placement surface of the refrigerator to be tested; the image ranging module is arranged on the inclined side plate and used for obtaining the distance between the image ranging module and the test equipment and the included angle between the test equipment and the image ranging module.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerator testing equipment, for example, to a positioning device for refrigerator testing. Background Art

[0002] At present, there are often many electronic devices in modern families, such as microwave ovens, televisions, computers, etc. These devices may generate electromagnetic interference when working. If the electromagnetic compatibility of the refrigerator is poor, it may be affected by these interferences, resulting in abnormal operation or performance degradation. At the same time, the electromagnetic radiation generated by the refrigerator itself may also interfere with other devices, affecting the overall use effect of household appliances. Therefore, before the refrigerator leaves the factory, it is necessary to conduct electromagnetic compatibility testing on the prototype to ensure that the refrigerator itself does not generate too much electromagnetic radiation to avoid interfering with the operation of other devices in the environment; that is, by conducting electromagnetic compatibility testing, it can be ensured that the refrigerator can work normally in a complex electromagnetic environment and improve the reliability and stability of the product. Specifically, electromagnetic compatibility testing includes two aspects of evaluation: electromagnetic interference (EMI) and electromagnetic immunity (EMS). Among them, the electromagnetic interference test is to verify whether the refrigerator will generate electromagnetic interference exceeding the specified limit when working, so as to ensure that it will not interfere with other electronic equipment; the electromagnetic immunity test is to verify whether the refrigerator can maintain normal operation when subjected to external electromagnetic interference, and will not have problems such as performance degradation or failure.

[0003] In the related art, when conducting electromagnetic compatibility test items on refrigerators, it is necessary to use customized line design to place the prototype and test equipment (artificial power network).

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The test equipment, namely the artificial power network, is small in size and needs to be plugged in and out for each test, which can easily cause position changes and affect the consistency and accuracy of the test results.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiment of the present disclosure provides a positioning device for refrigerator testing to ensure the consistency and accuracy of the test results.

[0009] In some embodiments, the positioning device for refrigerator testing includes a bottom plate, a surrounding side plate, a first ranging module and an image ranging module; wherein the bottom plate includes a first bottom plate, a first connecting plate and a second bottom plate that are bent and connected, the first bottom plate abuts against the top wall of the refrigerator to be tested, and the first connecting plate abuts against the right side wall of the refrigerator to be tested; the surrounding side plate includes a first side plate extending vertically, the bottom end of the first side plate is provided with an inclined side plate extending downward and away from the first side plate, the inclined side plate is connected to the first bottom plate by a second connecting plate, and the second connecting plate abuts against the rear side wall of the refrigerator to be tested; the first ranging module is arranged on the second bottom plate, and is used to measure the distance between the second bottom plate and the placement surface of the refrigerator to be tested; the image ranging module is arranged on the inclined side plate, and is used to obtain the distance between the image ranging module and the test equipment, and the angle between the test equipment and the image ranging module.

[0010] In some embodiments, the peripheral side panel also includes: a second side panel, which is bent and connected to the first side panel; the positioning device also includes: a calculation module, which determines the distance between the test equipment and the refrigerator to be tested according to the distance between the second bottom plate and the placement surface of the refrigerator to be tested, the distance between the inclined side panel and the test equipment, and the angle between the test equipment and the image ranging module; a display module, which is electrically connected to the calculation module and is used to determine the distance between the test equipment and the refrigerator to be tested.

[0011] In some embodiments, the peripheral side panels also include a third side panel and a fourth side panel extending vertically and bent and connected, wherein the first side panel, the second side panel, the third side panel and the fourth side panel are bent and connected in sequence; the positioning device also includes: a second ranging module, which is respectively arranged on the second side panel, the third side panel and the fourth side panel, and is used to measure the distance between the second side panel, the third side panel or the fourth side panel and the corresponding wall.

[0012] In some embodiments, the positioning device also includes: a top plate, fixedly disposed on the top end of the peripheral side plate, parallel to the first bottom plate; a third ranging module, disposed on the top plate, for measuring the distance between the top plate and the corresponding top wall.

[0013] In some embodiments, the first ranging module includes an infrared ranging module or a laser ranging module.

[0014] In some embodiments, the second ranging module includes an infrared ranging module or a laser ranging module.

[0015] In some embodiments, the third ranging module includes an infrared ranging module or a laser ranging module.

[0016] In some embodiments, the positioning device further includes: a first magnetic sheet, which is disposed on the first bottom plate and attracts the top wall of the refrigerator to be tested.

[0017] In some embodiments, the positioning device further includes: a second magnetic sheet, which is disposed on the first connecting plate and is attracted to the right side wall of the refrigerator to be tested.

[0018] In some embodiments, the positioning device further includes: a third magnetic sheet, which is disposed on the second connecting plate and attracts the front side wall of the refrigerator to be tested.

[0019] The positioning device for refrigerator testing provided by the embodiment of the present disclosure can achieve the following technical effects:

[0020] When performing an electromagnetic compatibility test on a refrigerator to be tested, the test equipment (artificial power network) is placed behind the rear side wall of the refrigerator. By making the first bottom plate abut against the top wall of the refrigerator to be tested, the first connecting plate abut against the right side wall of the refrigerator to be tested, and the second connecting plate abut against the rear side wall of the refrigerator to be tested, the positioning device can be installed at the top of the refrigerator close to the right side wall; the distance between the second bottom plate and the placement surface of the refrigerator to be tested can be determined by the first ranging module; the distance between the refrigerator to be tested and the test equipment can be accurately and real-time determined by the distance between the image ranging module and the test equipment, and the angle between the test equipment and the image ranging module. The tester can adjust the position of the test equipment according to the test data of the distance between the refrigerator to be tested and the test equipment, so as to ensure the consistency and accuracy of the test results.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of a positioning device for refrigerator testing provided by an embodiment of the present disclosure;

[0024] Figure 2 is a structural schematic diagram of another positioning device for refrigerator testing provided by an embodiment of the present disclosure;

[0025] Figure 3 is a structural schematic diagram of another positioning device for refrigerator testing provided by an embodiment of the present disclosure;

[0026] Figure 4 is a schematic structural diagram of a positioning device for refrigerator testing provided by an embodiment of the present disclosure after installation;

[0027] Figure 5is a schematic structural diagram of another positioning device for refrigerator testing provided by an embodiment of the present disclosure after installation;

[0028] Figure 6 It is a schematic diagram of the structure of another positioning device for refrigerator testing provided by an embodiment of the present disclosure after installation.

[0029] Reference numerals:

[0030] 01. Refrigerator to be tested; 02. Test equipment; 10. Bottom plate; 110. First bottom plate; 120. First connecting plate; 130. Second bottom plate; 140. Second connecting plate; 20. Side plate; 210. First side plate; 211. Inclined side plate; 220. Second side plate; 230. Third side plate; 240. Fourth side plate; 30. First distance measuring module; 40. Image distance measuring module; 50. Display module; 60. Second distance measuring module; 70. Top plate; 80. Third distance measuring module. DETAILED DESCRIPTION

[0031] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0032] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0034] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0035] Unless otherwise stated, the term "plurality" means two or more.

[0036] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0037] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0039] At present, there are often many electronic devices in modern families, such as microwave ovens, televisions, computers, etc. These devices may generate electromagnetic interference when working. If the electromagnetic compatibility of the refrigerator is poor, it may be affected by these interferences, resulting in abnormal operation or performance degradation. At the same time, the electromagnetic radiation generated by the refrigerator itself may also interfere with other devices, affecting the overall use effect of household appliances. Therefore, before the refrigerator leaves the factory, it is necessary to conduct electromagnetic compatibility testing on the prototype to ensure that the refrigerator itself does not generate too much electromagnetic radiation to avoid interfering with the operation of other devices in the environment; that is, by conducting electromagnetic compatibility testing, it can be ensured that the refrigerator can work normally in a complex electromagnetic environment and improve the reliability and stability of the product. Specifically, electromagnetic compatibility testing includes two aspects of evaluation: electromagnetic interference (EMI) and electromagnetic immunity (EMS). Among them, the electromagnetic interference test is to verify whether the refrigerator will generate electromagnetic interference exceeding the specified limit when working, so as to ensure that it will not interfere with other electronic equipment; the electromagnetic immunity test is to verify whether the refrigerator can maintain normal operation when subjected to external electromagnetic interference, and will not have problems such as performance degradation or failure.

[0040] When conducting electromagnetic compatibility tests on refrigerators, custom line design is required to place the prototype and test equipment (artificial power network). However, the test equipment, namely the artificial power network, is small in size and needs to be plugged in and out for each test, which can easily cause position changes and affect the consistency and accuracy of the test results.

[0041] The embodiment of the present disclosure provides a positioning device for refrigerator testing to ensure the consistency and accuracy of the test results.

[0042] Combination Figures 1 to 6 As shown, the positioning device for refrigerator testing provided by the embodiment of the present disclosure includes a bottom plate 10, a peripheral side plate 20, a first distance measuring module 30 and an image distance measuring module 40; wherein the bottom plate 10 includes a first bottom plate 110, a first connecting plate 120 and a second bottom plate 130 connected by bending, the first bottom plate 110 abuts against the top wall of the refrigerator to be tested 01, and the first connecting plate 120 abuts against the right side wall of the refrigerator to be tested 01; the peripheral side plate 20 includes a first side plate 210 extending vertically, and the bottom end of the first side plate 210 is provided with a downward and away from the first side plate The inclined side plate 211 extends in the direction of the plate 210, and the inclined side plate 211 is connected to the first bottom plate 110 through the second connecting plate 140, and the second connecting plate 140 abuts against the rear side wall of the refrigerator to be tested 01; the first ranging module 30 is arranged on the second bottom plate 130, and is used to measure the distance between the second bottom plate 130 and the placement surface of the refrigerator to be tested 01; the image ranging module 40 is arranged on the inclined side plate 211, and is used to obtain the distance between the image ranging module 40 and the test equipment 02, and the angle between the test equipment 02 and the image ranging module 40.

[0043] Optionally, by constructing the bottom plate 10 as a first bottom plate 110, a first connecting plate 120 and a second bottom plate 130 that are bent and connected, and constructing the bottom end of the first side plate 210 to be provided with an inclined side plate 211 extending downward and away from the first side plate 210, and connecting the inclined side plate 211 to the first bottom plate 110 via the second connecting plate 140, the first bottom plate 110 can be abutted against the top wall of the refrigerator 01 to be tested, the first connecting plate 120 can be abutted against the right side wall of the refrigerator 01 to be tested, and the second connecting plate 140 can be abutted against the rear side wall of the refrigerator 01 to be tested, so that the positioning device for refrigerator testing can be conveniently installed at the upper right corner and at the rear of the refrigerator 01 to be tested, so as to avoid other objects or equipment blocking the line of sight of the positioning device during the test.

[0044] The second bottom plate 130 is provided with a first distance measuring module 30, which is used to measure the distance between the second bottom plate 130 and the placement surface of the refrigerator 01 to be tested, which can be regarded as the height of the refrigerator 01 to be tested; the inclined side plate 211 is provided with an image distance measuring module 40, which is used to obtain the distance between the image distance measuring module 40 and the test device 02, and the angle between the test device 02 and the image distance measuring module 40. The image distance measuring module 40 is a depth camera.

[0045] It should be noted that, combined with Figure 6As shown, the angle between the test device 02 and the image ranging module 40 refers to: the angle between: the edge of the top wall of the refrigerator to be tested 01 close to the image ranging module 40 and the projection of the line connecting the test device 02 and the image ranging module 40 on the plane where the top wall of the refrigerator to be tested 01 is located.

[0046] The positioning device for refrigerator testing determines the distance d between the test device 02 and the refrigerator to be tested according to the distance h between the second bottom plate 130 and the placement surface of the refrigerator to be tested 01, the distance l between the image ranging module 40 and the test device 02, and the angle α between the test device 02 and the image ranging module 40, that is, d = (h 2 +l 2 ) 1 / 2 *sinα. In this way, according to the distance d between the refrigerator to be tested and the testing equipment in real time, the tester can adjust the position of the testing equipment to ensure the consistency and accuracy of the test results.

[0047] The image ranging module 40 recognizes the coordinates (x, y) of the artificial power network through the color image, and then obtains the depth information of the point (x, y) according to the depth image to obtain the distance l between the image ranging module 40 and the test equipment (artificial power network).

[0048] Optionally, the positioning device for refrigerator testing also includes a control module, in which the distance from the first distance measuring module 30 to the first base plate 110 is pre-stored, so that the distance obtained by the first distance measuring module 30 can be corrected and a correction value h' can be obtained to obtain the distance between the top wall and the placement surface of the refrigerator 01 to be tested, that is, the height of the refrigerator 01 to be tested.

[0049] In this scheme, the distance from the lower edge of the refrigerator prototype to the test equipment (artificial power network) is not directly collected by the depth camera. Instead, the distance from the top wall edge of the refrigerator to the test equipment, the height of the refrigerator, and the angle between the test equipment and the positioning device are determined by the positioning device used for refrigerator testing and then calculated. In this way, obstacles such as debugging devices and protrusions set on the rear side wall that block the depth measurement of the deep image ranging module during the test can be avoided, thereby improving the measurement accuracy.

[0050] In addition, the positioning device for refrigerator testing also includes a memory module. By using the positioning device for refrigerator testing provided by the embodiment of the present invention, the test data of the distance between the refrigerator to be tested and the test equipment can be calculated in real time for the position of the test equipment, the test equipment and the refrigerator to be tested at the current position can be tested, and the test results can be recorded and stored for easy retrieval.

[0051] By using the positioning device for refrigerator testing provided by the embodiment of the present disclosure, when performing an electromagnetic compatibility test on the refrigerator to be tested, the test equipment (artificial power network) is placed behind the rear side wall of the refrigerator, and the positioning device can be installed at a position close to the right side wall of the top of the refrigerator by making the first bottom plate abut against the top wall of the refrigerator to be tested, the first connecting plate abut against the right side wall of the refrigerator to be tested, and the second connecting plate abut against the rear side wall of the refrigerator to be tested; the distance between the second bottom plate and the placement surface of the refrigerator to be tested can be determined by the first ranging module; the distance between the refrigerator to be tested and the test equipment can be accurately and real-time determined by the distance between the image ranging module and the test equipment, and the angle between the test equipment and the image ranging module, and the tester can adjust the position of the test equipment according to the test data of the distance between the refrigerator to be tested and the test equipment, so as to ensure the consistency and accuracy of the test results.

[0052] Optionally, the surrounding side panel 20 also includes: a second side panel 220, which is bent and connected to the first side panel 210; the positioning device for refrigerator testing also includes: a calculation module, which determines the distance between the test device 02 and the refrigerator to be tested 01 according to the distance between the second bottom plate 130 and the placement surface of the refrigerator to be tested 01, the distance between the inclined side panel 211 and the test device 02, and the angle between the test device 02 and the image ranging module 40; a display module 50, which is electrically connected to the calculation module and is used to measure the distance between the test device 02 and the refrigerator to be tested 01.

[0053] The calculation module determines the distance d between the test device 02 and the refrigerator to be tested according to the distance h between the second bottom plate 130 and the placement surface of the refrigerator to be tested 01, the distance l between the image ranging module 40 and the test device 02, and the angle α between the test device 02 and the image ranging module 40, that is, d=(h 2 +l 2 ) 1 / 2 *sinα.

[0054] The calculation results obtained by the calculation module can be displayed in real time on the display module, so that the tester can obtain real-time measurement results. In this way, the tester's time can be saved and the consistency and accuracy of the test results can be guaranteed.

[0055] Optionally, the calculation module is electrically connected to the control module to obtain a correction value, thereby improving the accuracy of the test result.

[0056] Optionally, the peripheral side panel 20 also includes a third side panel 230 and a fourth side panel 240 extending vertically and being bent and connected, wherein the first side panel 210, the second side panel 220, the third side panel 230 and the fourth side panel 240 are bent and connected in sequence; the positioning device for refrigerator testing also includes: a second ranging module 60, which is respectively arranged on the first side panel 210, the second side panel 220, the third side panel 230 and the fourth side panel 240, and is used to measure the distance between the first side panel 210, the second side panel 220, the third side panel 230 or the fourth side panel 240 and the corresponding wall.

[0057] By setting the second ranging module 60, the distance between the first side panel 210, the second side panel 220, the third side panel 230 or the fourth side panel 240 and the corresponding wall can be determined, so as to determine the distance between the refrigerator to be tested 01 and each wall, so as to ensure the accuracy of the test position of the refrigerator to be tested 01.

[0058] Optionally, the positioning device for refrigerator testing also includes: a top plate 70, fixedly disposed on the top of the peripheral side plate 20, parallel to the first bottom plate 110; a third distance measuring module 80, disposed on the top plate 70, for measuring the distance between the top plate 70 and the corresponding top wall.

[0059] The third distance measuring module 80 can be used to determine the distance between the top plate 70 and the corresponding wall, so as to determine the distance between the refrigerator to be tested 01 and the corresponding top wall, thereby ensuring the accuracy of the test position of the refrigerator to be tested 01 .

[0060] Optionally, the first distance measuring module 30 includes an infrared distance measuring module or a laser distance measuring module.

[0061] Optionally, the second distance measuring module 60 includes an infrared distance measuring module or a laser distance measuring module.

[0062] Optionally, the third ranging module 80 includes an infrared ranging module or a laser ranging module.

[0063] Preferably, in this solution, the first distance measuring module 30, the second distance measuring module 60, and the third distance measuring module 80 are infrared distance measuring modules.

[0064] Optionally, the positioning device for refrigerator testing further includes: a first magnetic sheet, which is disposed on the first bottom plate 110 and attracts the top wall of the refrigerator 01 to be tested.

[0065] Since the outer shell of the refrigerator to be tested 01 is usually a sheet metal part, that is, the top wall is metal, the first magnetic sheet arranged on the first bottom plate 110 can attract the top wall of the refrigerator to be tested 01 to avoid displacement of the positioning device used for refrigerator testing, thereby ensuring the stability of the setting position, thereby improving the accuracy of the ranging results, and further improving the accuracy of the electromagnetic compatibility test results.

[0066] Optionally, the positioning device for refrigerator testing further includes: a second magnetic sheet, which is disposed on the first connecting plate 120 and attracts the right side wall of the refrigerator 01 to be tested.

[0067] By providing the second magnetic sheet on the first connecting plate 120 , the stability of the positioning device for refrigerator testing can be further improved to avoid displacement.

[0068] Optionally, the positioning device for refrigerator testing further includes: a third magnetic sheet, which is disposed on the second connecting plate 140 and attracts the front side wall of the refrigerator 01 to be tested.

[0069] By providing the third magnetic sheet on the second connecting plate 140 , the stability of the positioning device for refrigerator testing can be further improved to avoid displacement.

[0070] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A positioning device for refrigerator testing, characterized in that: include: The bottom plate includes a first bottom plate, a first connecting plate and a second bottom plate which are bent and connected, the first bottom plate abuts against the top wall of the refrigerator to be tested, and the first connecting plate abuts against the right side wall of the refrigerator to be tested; The peripheral side plate comprises a first side plate extending in a vertical direction, the bottom end of the first side plate is provided with an inclined side plate extending downward and away from the first side plate, the inclined side plate is connected to the first bottom plate by a second connecting plate, and the second connecting plate abuts against the rear side wall of the refrigerator to be tested; A first distance measuring module is provided on the second bottom plate and is used to measure the distance between the second bottom plate and the placement surface of the refrigerator to be tested; The image ranging module is arranged on the inclined side plate, and is used to obtain the distance between the image ranging module and the test equipment, and the angle between the test equipment and the image ranging module.

2. The positioning device according to claim 1, characterized in that: The side plate also includes: A second side plate, bent and connected to the first side plate; The positioning device also includes: A calculation module, which determines the distance between the test device and the refrigerator to be tested according to the distance between the second bottom plate and the placement surface of the refrigerator to be tested, the distance between the inclined side plate and the test device, and the angle between the test device and the image ranging module; The display module is electrically connected to the calculation module and is used to test the distance between the device and the refrigerator to be tested.

3. The positioning device according to claim 2, characterized in that: The peripheral side plate further includes a third side plate and a fourth side plate extending vertically and being bent and connected, wherein the first side plate, the second side plate, the third side plate and the fourth side plate are bent and connected in sequence; The positioning device also includes: The second distance measuring modules are respectively arranged on the second side plate, the third side plate and the fourth side plate, and are used to measure the distance between the second side plate, the third side plate or the fourth side plate and the corresponding wall.

4. The positioning device according to claim 3, characterized in that: Also includes: A top plate, fixedly arranged on the top end of the peripheral side plate and parallel to the first bottom plate; The third distance measuring module is arranged on the top plate and is used to measure the distance between the top plate and the corresponding top wall.

5. The positioning device according to claim 4, characterized in that: The first distance measuring module includes an infrared distance measuring module or a laser distance measuring module.

6. The positioning device according to claim 4, characterized in that: The second distance measuring module includes an infrared distance measuring module or a laser distance measuring module.

7. The positioning device according to claim 4, characterized in that: The third distance measuring module includes an infrared distance measuring module or a laser distance measuring module.

8. The positioning device according to any one of claims 1 to 7, characterized in that: Also includes: The first magnetic sheet is arranged on the first bottom plate and attracts the top wall of the refrigerator to be tested.

9. The positioning device according to any one of claims 1 to 7, characterized in that: Also includes: The second magnetic sheet is arranged on the first connecting plate and attracts the right side wall of the refrigerator to be tested.

10. The positioning device according to any one of claims 1 to 7, characterized in that: Also includes: The third magnetic sheet is arranged on the second connecting plate and attracts the front side wall of the refrigerator to be tested.

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